Evolion Li-ion battery - Saft BatteriesThe Evolion is a Li-ion battery system. The battery system or module includes two main parts, a Li-ion cell pack and electronics. Both combine

Evolion® Li-ion battery

Technical manual

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1. Introduction 4

2. Electrochemical principles 4

3. Evolion construction 5

Contents

3.1 Module characteristics

3.2 Interface features 7

3.3 Main functional features 8

3.4 Front cover features 8

4.1 Application summary

4.2 The electronic switch (mosfets) 10

4.3 Operating modes 11

4.4 Internal electronic load 11

4.5 Internal heater 12

4.6 Cell balancing 12

4.7 System level and cell level current interrupt devices 12

4.8 Safety limits during operation 13

4.9 Module self test during startup 14

4. Evolion operation 9

5. Cell and module voltages 15

6. Internal resistance 16

7. Discharging 16

5.1 Normal operating voltage limits

5.2 Cell self discharge 15

5.3 Open Circuit Voltage (OCV) as a function of State of Charge (SoC) 15

7.1 Discharge performance factors

7.2 Maximum discharge current 18

7.3 Low voltage disconnect 18

8. Charging 19 8.1 Maximum re-charge current (IMR)

8.2 Power system set points 21

8.3 Re-charge time 21

8.4 Heat sink dissipation in charge regulated mode 22

9. Gassing and ventilation 22 9.1 Cell venting in operation

9.2 The probability of an internal short 23

9.3 Released gas characteristics 23

10. Service life 23

11. Communication 26

12. Black box 26

13. Special operations 27 13.1 Massive paralleling

13.2 Thermal characteristics in cycling 28

13.3 Adding modules to existing bus 29

14. Abusive operations 30

15. Battery sizing 30 15.1 Autonomy sizing

Appendix A: Part number reference 32Appendix B: Glossary 32Appendix C: Performance rate tables 33Appendix D: Derating factors for sizing 33Appendix E: Alarms and troubleshooting 36Appendix F: BMST versions 42

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The Saft Evolion® is suited for many different applications and environments and its compact size and high energy density allow it to

deliver the highest performance from a smallest volume and weight. The Evolion offers a unique combination of high float charging life

and high cycling performance in the same technology.

The Evolion is a Li-ion battery system. The battery system or module includes two main parts, a Li-ion cell pack and electronics. Both

combine together to make a smart battery module. The module operates in a single package and as a standalone 48 Vdc unit. It can

communicate to/from the application (dry contact signal and RS485 transmission bus) and can report its status using the user friendly

Saft DiagWinBMS communication kit.

This manual gives the technical features, operating characteristics and operating limits of the Saft Evolion module when it is applied in

standby applications and frequent cycling applications.

1. Introduction

2. Electrochemical principlesThe electrochemical pack of Li-ion cells is the heart of the module. The cells use the NCA (Nickel Cobalt Aluminum) electrochemistry.

NCA refers to the active material mixture of the positive electrode. The mixture includes metal oxides in a composition of LiNiXCoyAlzO2,

hence, a Nickel Cobalt Aluminum mixture or NCA.

The positive electrode stores lithium ions through intercalation during discharge. The negative electrode is composed of graphite

active material. It stores lithium ion through intercalation during charge. Refer to Figure 1.

Figure 1. The reaction mechanism of the lithium-ion cell.

5

The Evolion is a single 48 V module. The main components include a 14 cell pack of VL80E and two main electronic printed circuit

boards. A Battery Management System Telecom (BMST) is built into each module. With its microprocessor combined with the BMST

software (or firmware), the BMST optimizes the performance and protects the Evolion against situations like over charge, over and

under discharge, over and under temperature or over current. No external BMS is used. Each Evolion can be installed and operated

independently regardless of the number connected on the same power bus.

The BMST also allows communication via RS485 bus with the Saft Evolion Toolbox supervision software, for diagnostics or application

controller and its software, for feedback control. It can also integrate to the application alarm panel using a dry contact signal.

3. Evolion construction

A spirally wound electrode coil is used. The electrodes are made by depositing the active materials, mixed with a binder and

conductive agents, on a current collector. A metallic copper is used for the negative current collector and a metallic aluminum is

used for the positive current collector. A non-conductive separator material is interleaved in the coil to prevent short-circuiting of the

positive and negative and allow the electrolyte to conduct the lithium ions.

The electrolyte consists of a proprietary mixture of alkyl carbonates and lithium salt. A vinylene carbonate additive is used for negative

electrode SEI formation (Solid-Electrolyte Interface). The electrolyte is non-aqueous. The electrolyte conducts lithium ions from the

positive to the negative during charge and discharge.

The Li-ion electrochemistry accepts charge current with approximately 100 % coulombic efficiency over all temperature ranges. Unlike

aqueous battery technologies (Ni-Cd and Lead acid), the Li-ion electrochemistry does not use side reactions, like water electrolysis,

even when fully charged. Overcharging will not occur with Li-ion technology. Once the cell is fully charged, an insignificant amount of

charge current will be accepted by the cells. The Saft NCA lithium ion cell is sealed and does not produce or exhaust any gases during

normal operation.

The reaction mechanism of lithium-ion batteries is represented by Figure 1. The positive and negative materials facilitate intercalation

of lithium ions. The net effect of the charge and discharge reaction is the movement of lithium ions back and forth between the

electrodes. The corresponding flow of electrons in the external circuit is proportional to the ion flow between the electrodes. There is

no lithium metal formed in the NCA Li-ion electrochemistry used in the Evolion and therefore there are no hazards associated to that.

The Li-ion cell pack operates in a system combined with electronics (see section Evolion construction). The system is designed with

redundant safety functions to make sure the cells never exceed a preset operating level. One of the main safety factors is the cell

temperature limits. The Evolion operates normally and safely in the temperature range from - 40°C to + 75°C (- 40°F to + 167°F).

Important note: Chemical instability begins at above + 80°C (+ 176°F).

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3.1 Module characteristics

Parameter Value

Typical capacity @ C/8 A and 25ºC 77 Ah

Rated capacity @ C/8 A and 25ºC 74 Ah



Width 216 mm (8.50 inches) equivalent to 5 RU

Depth 404 mm (15.91 inches)

Height 260 mm (10.24 inches) equivalent to 6 RU

Weight 30 kg (66 lbs)

Case Material Polycarbonate, UL94 V0 compliant

Protection index (IP)IP20 It is also waterproof when immersed in water up to 6 inches (15.2 cm) from the bottom when mounted right side up.

Nominal voltage 48 Vdc

Maximum voltage 56 Vdc

Minimum voltage 42 Vdc (internal Low Voltage Disconnect or LVD)

Maximum charge current @ 20ºC (Note 1) 32 Amps

Maximum discharge current @ 20ºC (Note 2) 44 Amps

Operating temperature range - 40ºC / + 75ºC (- 40ºF / + 167ºF)

Storage temperature range - 40ºC / + 75ºC (- 40ºF / + 167ºF)

Maximum relative humidity 95 % (non condensing)

Maximum operating altitude 3000 meters (9843 feet)

Insulation resistance @ 500 Vac 1 Mohm

Dielectric resistance 500 Vrms

BMST version See Appendix F

Note 1: The maximum charge current is a function of the measured battery temperature and represents the limit where the regulated charge mode will be activated. See section Charging for more details. The values are given for BMST software version 0.57 and later.

Note 2: The maximum discharge current is a function of the measured battery temperature and represents the limit where the battery will not discharge if exceeded. See section Discharging for more details. The values are given for BMST software version 0.57 and later.

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3.2 Interface features

# Interface feature Description

1 Power terminalsThe terminal cover caps are IP2X compliant. The connecting hardware is M6 and the maximum torque is 6 Nm (53 in lbs). The maximum cable size that can be routed in the cable channels is a 16 mm2 section or gauge 6 AWG. 36 Vdc minimum is needed to automatically wake up the module.

2 RJ45 connections

The RJ45 protection caps are IP3X compliant. Both 8 pin connectors are connected in parallel and can be used interchangeably to access the signals. All the pins are 1500 Vdc isolated.

Pin Type Description1 RS485+ transmission bus

Modbus communication protocol2 RS485- transmission bus3 Ground (isolated from power terminals)

4 Wake up (referenced to Ground) 12 Vdc signal5 Not used6 Not used7 Dry contactor (not polarized) 100 mA/60 Vdc max., CLOSED = alarm or power

down, OPEN = no alarm8 Dry contactor (not polarized)

3 LED’sFour LED’s are used and are numbered 1 through 4. During operation they give information about the module operating mode, i.e., charge, float charge or discharge and its alarm state. They provide SOC information when the SOC button is pushed.

4 ON/OFF button

This button toggles the Evolion module OFF or ON. When OFF no LED’s are lit and the unit remains in sleep mode.

ON = press 2 seconds

OFF = press 4 seconds

Important: High discharge current, due pre-charging a capacitance on the rectifier output circuit may open, the replaceable fuse. As a general rule, never use the ON/OFF button to turn the Evolion ON after the power terminals are connected to the application.

5 SOC button This button gives the module SOC indicated on the 4 LED’s.

6 Heat sink Dissipates the extra power when the module has regulated charge mode active. The metal surface offers a grounding connection point that uses an M3 screw.

7 Handles Hand lifting points.

8 Label Manufactured information.

9 Vent ports Allows gas escape in the abnormal event of cell venting.

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3.3 Main functional features

# Interface feature Description

1 Cell pack

The series connected cells are configured in a high energy dense cell pack. Each cell is equipped with an internal current interrupt device. In case the maximum internal pressure or a maximum current level is exceeded, this device opens the current flow in the series pack. Additionally, each cell is designed to open and allow abnormally high pressure to vent. This controlled venting minimizes the risk of a flare up event. Further, each cell is spaced and externally sleeved with an optimal distance in order to prevent thermal propagation from one cell to another, in the unlikely event of a cell flare up.

2 BMST busbar board

The cell pack is connected with a BMST busbar board. The BMST busbar board is located just under the top cover and it provides several functions. It is a power supply, a microcontroller, it monitors cells’ voltage, it measures temperature, it balances cell voltages, it provides redundant monitoring, it measures network & module voltage, it generates alarms, it provides external communication, it provides the front panel HMI, heats the cells and measures current.

3 BMST power board

The BMST busbar board interconnects with the BMST power board. It is located just under the front face and it provides several functions. It is the charge control, the discharge control, includes a mosfet test and provides the overcurrent protection. It mounts the module power terminals, BMST reset button and replaceable fuse. The front cover is removable to access the reset button and the replaceable fuse. Refer to the figure and table below.

# Front cover feature Description

1 Power terminals

Power connection to the bus. Use only approved power cables provided by Saft or equivalent (with continuous current carrying capability of 63 Amps). The maximum torque is 6 N·m (53 in·lbs).

Important: If the power terminals are reverse connected to the rectifier output the battery will not start. If the ON/OFF button is forced to start the Evolion ON, then alarm 27 and 47 will activate and the Evolion will be in safe mode.

2 BMST reset button

Push button micro switch is recessed in hole and it is used to reset the BMST microprocessor in case of a software trap or an emergency alarm.

3 Replaceable fusePower fuse rated at “60 A”. Use only approved fuse provided by Saft or equivalent (supplier: Ferraz Shawmut, type: 2.5 URGS 17/60). See Figure 4 for fuse limit characteristics. Protects the Evolion against external short circuit.

3.4 Front cover features

steady Emergency alarm

steady Software trap

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The Evolion is designed for 48 Vdc nominal power systems. The applications can be grid connected or off grid and the Evolion can

remain on float or cycled frequently over its useful life.

4.1 Application summaryThe Evolion is a standalone battery system.

The Evolion is designed for installation in indoor or outdoor sites. The temperature can be controlled or uncontrolled. The enclosure,

compartment or area where the Evolion is placed should have a minimum protection index of IP55.

The Evolion discharges with rates equal to 2 hours of autonomy and higher runtimes. It re-charges fully in 3 to 24 hours (from a full

discharge). Typical applications include standby power for remote terminals, BTS, customer premises, underground vaults, huts and

DPCO for good power grid or poor power grid regions and in hybrid power and solar applications for off grid sites.

The Evolion is connected to the application with power cables and with an optional communication cable. Units can be connected in

parallel to increase the battery bank capacity and power but it is never allowed to build a series to increase the system voltage. The

Evolion can only operate on a 48 V bus.

The dimensions are optimized to fit with good volumetric efficiency in a standard 19” (upright orientation) and a standard 23”

equipment rack (sideways orientation). The module interface features are front accessed which allows it to adapt well in confined

roadside cabinet compartments. When the Evolion is integrated in the application, the following functions are built into each module.

4. Evolion operation

Figure 2. Schematic view of Evolion connected to application.

The following BMST software versions are compatible to connect and operate in parallel.

BMST software version Parallel connect and operate

0.55 & 0.56 OK

0.57 & 0.58 OK OK

0.59 & 1.00 OK

Upgrading all operating Evolions to the latest BMST software version is always recommended. Contact your local Saft representative

to upgrade procedure details.

See the Figure 2 below for a schematic view of Evolion installed in the application. For more details about the “Switch”, see chapter

The electronic switch (mosfets).

• Compatibility with typical telecom rectifiers

(60 V maximum rated output)

• Charge current regulation

• Low voltage discharge cut-off (42 V)

• Safety disconnecting through system level micro-controller

and mosfet contactor

• Safety disconnecting through system level redundant

hardware safety chain or fuses

• Safety disconnecting through cell level current interrupt

devices

• LED’s, dry contact signal and RS485 communication bus

• Operation status through LED’s and RS485 bus

• State of charge and state of health status through LED’s and

RS485 bus

• Automated internal heater operation

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Figure 3. Schematic view of the electronic switch (mosfets) in the Evolion.

# Application parameter Description

1 Load limits

Each module can provide and accept up to 44 A of discharge/charge current. To avoid damaging the BMST power board, the maximum total system discharge load should be below 130 Amps. If the total system discharge load exceeds 130 Amps, regardless of the number of parallel Evolion modules, it is necessary to implement an external protection device like a Saft specified breaker (per Evolion or pair of Evolions) and/or an electronically controlled contactor(s) piloted by a signal by measured Evolion parameters (via RS485 or external measurement). See details in the chapter Massive paralleling.

2 Re-charge limits

The Evolion uses an automatically actuated charge regulated mode, so normally sized rectifier outputs are compatible with Evolion operation. If a minimum re-charge time is needed, it is necessary to control the charge output to avoid charge regulated mode and possible damage to the BMST power board. The rated output of the charger should be 60 V maximum. A higher rated output allow a high current or high voltage transients, for a short time, even if the set point is lower than 60 V. In charge regulated mode, the typical re-charge time can be up to 24 hours. See details in the chapter Massive paralleling.

3 Communication/alarms

The transmission protocol is RS485. The communication protocol is Modbus. Application controllers can communicate with the Evolion or parallel connected Evolions to receive information or command the Evolion’s state. A dry contact signal is also actuated (normally closed) when customer specified alarms are exceeded or the module power is OFF.

# Switch Description

1 Discharge Mosfet driver for discharge acted on by BMST microcontroller

2 Redundant discharge Mosfet driver for discharge with delay time acted on by the redundant hardware safety chain

3 Fast charge Mosfet driver for charge acted on by the BMST microcontroller

4 Redundant charge Mosfet driver for charge with time delay acted on by the redundant hardware safety chain

5 Slow charge Mosfet driver for regulated charge acted on by the BMST microcontroller

4.2 The electronic switch (mosfets)The Evolion operates with 6 modes. The modes are invoked by controlling the state of an electronic switch circuit (combined with

diodes). The switch circuit is located on the BMST power board. The electronic switches are acted on by the BMST microcontroller

or the redundant hardware safety chain. The electronic switch state depends on the measured value of the single module’s state

variables, i.e., voltage, temperature and current. See the Figure 3 below for a schematic overview of the electronic switch (mosfets)

located on the BMST power board.

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4.3 Operating modesIn all modes except sleep mode, the terminal voltage is present, the RS485 communication is active, the LED’s operate and the dry

contactor operates. Each Evolion controls its own switch state, independent of other parallel connected modules, without the need of

an external master battery management module.

Mode Schematic Description

Regulated charge

Charge current is accepted anytime the network voltage is higher than the Evolion terminal voltage. Current is accepted through the current regulation device. If the charge current exceeds the maximum allowed charge current (See Charging section), the charge regulated mode becomes active. The current will be limited and the excess charge energy dissipates through the front face heat sink. The surface of the heat sink will be “hot” during which is normal for regulated charge mode. The Evolion checks every 60 seconds if the maximum charge current is still exceeded by direct connecting for a short time (see Fast charge mode) and measuring the current. Regulated charge mode will remain active as long as the charge current exceeds the maximum allowed charge current. Discharge is always allowed and switching is done with no time delay.

Fast charge

Charge current is accepted anytime the network voltage is higher than the Evolion terminal voltage. The cells are directly connected to the network voltage. If the charge current does not exceed the maximum allowed charge current (See Charging section), the Fast charge mode stays active. Anytime the charge current exceeds the maximum allowed charge current, the Charge regulated mode will become active. Discharge is always allowed and switching is done with no time delay.

Float charge

Same as Fast charge mode but in this case the network voltage is equal to the Evolion voltage and the current accepted by the Evolion cells is zero. The network only provides power (65 mA) for internal electronics. Discharge is always allowed and switching is done with no time delay.

Forbidden charge

Regulated charge, fast charge and float charge modes are disabled. This situation appears when a limit is exceeded, i.e., minimum or maximum cell or battery voltage. Discharge is always allowed and switching is done with no delay.

Discharge

Discharge current occurs anytime the network voltage is less than the Evolion terminal voltage (AC power outage). The battery continues to discharge until the minimum voltage of 42 V where it switches to the sleep mode. The battery automatically begins charging, with no switching delay, when the network voltage (AC power) returns.

Sleep and Safe

The switch is open. No current can pass in charge or discharge and the LED’s do not operate. There is no output voltage on the terminals.

4.4 Internal electronic loadAn internal electronic load keeps the Evolion’s automatic functionality alive. There are two scenarios, i.e., sleep mode and all other

modes. The low power consumption is supplied from the 48 Vdc circuit.

Sleep mode (OFF) 120 micro-amps @ 42 VdcAll other operating modes, Nominal (ON) 65 milli-amps @ 56 Vdc

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4.5 Internal heaterThe Evolion uses an internal heater to optimize its performance. The internal heater operates as a function of the measured module

temperature. It works in all modes of operation except sleep and safe modes. The load to the heater is supplied from the 48 Vdc

circuit. Approximately 60 Watts of heat is generated when the heater is ON.

The internal heater raises the module temperature at a rate of approximately 8ºC per hour (14.4ºF per hour) and can be considered

linear between - 40ºC to + 10ºC (heater operation range). Never apply external insulation around the Evolion. This may cause local

overheating or local hot spots that could damage the module.

4.6 Cell balancingThe Evolion is equipped with automatic and dynamic cell balancing circuits. The cell balancing is active in charge and floating modes

and it is not active in discharge mode. It is also intermittently active while the module is in storage. A separate balancing circuit is

applied to each cell. The cell balancing is only active for cells that are too high in voltage.

During cell balancing, the extra energy supplied from the high voltage cell is dissipated as heat.

Cell balancing is not active all the time. The cell balancing process starts when,

• cell voltage is greater than or equal to 3.5 V AND

• module temperature is less than 55ºC (131ºF) AND

• cell voltage is greater than or equal to 30 mV higher than the lowest cell voltage

The cell balancing process stops when,

• cell voltage is lower than 3.5 V OR

• module temperature is above 55ºC (131ºF) OR

• cell voltage is less than or equal to 20 mV higher than the lowest cell voltage.

The balancing current for a single cell ranges between 75 mA to 85 mA. It operates by loading a single cell with 46.5 Ω and is only

active between 3.5 Vpc to 4.0 Vpc during charge. If any cell voltage ever increases higher than 100 mV from the lowest cell voltage, the

unbalanced cell alarm will be activated by the BMST.

In sleep mode, while the Evolion is in storage, cell balancing occurs automatically. Every hour, the system automatically checks if the

balancing process needs to be activated. This feature allows the Evolion to begin normal operation in the application, even after a long

storage period, without the need to do an equalization charge.

4.7 System level and cell level current interrupt devicesEach cell includes a current interrupt that is actuated, automatically, if the internal cell pressure exceeds 9 ± 2 bars or if the cell

current exceeds 180 Amps. If the current interrupt of one cell opens, the current to the Evolion module will stop.

Additionally, there are 3 system level current interrupt devices included in each Evolion. The redundant devices include the (a)

electronic switch - mosfets (primary) and (b) a 60 Amp user replaceable fuse (secondary) and (c) and a 75 Amp fuse (tertiary); built into

the BMST busbar board and it is not replaceable.

For example, if a safety value, i.e., current, voltage, temperature, etc., is exceeded for up to a period of 1 second, the electronic

switch (primary current interrupt) will operate open (safe mode). When it operates, it can tolerate current up to 130 Amps (charge or

discharge). If it operates when the current is higher than this, damage may occur.

The secondary current interrupt device is the 60 A replaceable fuse (See section Front cover features). Figure 4 illustrates the opening

characteristics of the primary and secondary interrupt devices.

Heater ON when the module temperature is below 10ºC (50ºF)

Heater OFF when the module temperature is above 15ºC (59ºF)

Heater load (Float charge mode) 1.1 Amps

Heater load (Discharge mode) 1.0 Amps

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If the electronic switch opens due to a major alarm, in most cases the major alarm will reset automatically, after the fault condition is

corrected, and the electronic switch will in turn close to continue normal operation. If the 60 Amp replaceable fuse ever opens, it must

be replaced in order to make the Evolion operable. See Evolion installation and operation instruction for details.

Important note: If the redundant 75 Amp fuse ever opens (tertiary protection), the unit must be replaced.

Important note: If an Evolion module is exposed to 130 Amps or more of discharge load or re-charge current, even for a short time, the

mosfets on the BMST power board may be damaged if the 60 Amp replaceable fuse doesn’t act. In that case the module must be replaced.

4.8 Safety limits during operationEach Evolion measures and controls its own state. It operates independently regardless of the number of modules that are connected

in parallel and without the need of an external master BMS. Safety limits are defined and are controlled based on the measured state

of the module or cell.

There are two types of alarms.

Type LED indication Operation mode when active

Major alarm steady Safe mode (stops module operation)

Warning alarm steady Nominal mode (continues module operation)

When either alarm occurs, the LED’s indicate which. Additionally, a dry contact signal can be actuated (pins 7 and 8 on the RJ45) anytime a

major or warning alarm is activated. The alarm outputs are set by the user and are configurable using the Evolion Toolbox software.

Additionally, the alarm signal is communicated on the RS485 transmission bus. The Modbus communication protocol can be used to

communicate the alarm states to the application. See more details in the Evolion communication user manual.

Most major and warning alarms will automatically reset when the limit value is no longer exceeded (hysteresis included). In some

cases, the alarm will not reset or can only be reset by either cycling ON and OFF the charger/rectifier output or providing a BMST reset.

A summary of the main operational safety limits are given in the Figure 5.

For more details, see Appendix E Alarms and troubleshooting.

Current/unit (A)

Dev

ice

open

ing

time

(ms)

10 100 1000 10000

1E+10

1E+09

100000000

10000000

1000000

100000

10000

1000

100

10

1

0.1

0.01

0.001

Mosfet contactor (primary)

Replaceable fuse (secondary)

Max. Mosfet Amps (130 A)

Max. Dchg Amps/module (44 A)

Figure 4. The opening characteristics of the primary and secondary current interrupt devices in the Evolion. The replaceable fuse curve will shift left or right depending on temperature (130 A to 200 A at 1 second).

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Figure 5. Main operation safety limits of the Evolion.

4.9 Module self test during startupOn startup, a self-test is performed anytime the Evolion is awakened from the sleep mode by either,

• pressing the ON/OFF

• applying the rectifier output to the power terminals (minimum 36 Vdc)

• applying a 12 Vdc signal to pin 4 of the RJ45

The functions that are checked on start up include,

• Charger overvoltage (Alarm 27)

• Charger reverse polarity (Safe mode and Alarm 27 & 47)

• Mosfets or Fuse Blown (Safe mode and Alarm 47), tested if no charger is present

• Safety redundant channel (Safe mode and Alarm 47)

• Current not in the deadzone (Safe mode and Alarm 47)

• Software and Parameters CRC invalid (Safe mode and Alarm 47)

• Memory check invalid (Safe mode and Alarm 47)

The duration of the self-test takes less than 3 seconds. Each parallel module in an Evolion battery bank may not start and finish the

self-test at the same time. In that case, a “soft start” or “ramp in” feature on the rectifier output is useful. This feature helps to prevent

one Evolion (the first to complete its self test) from bearing all the output charge current.The battery will not operate until the self-test

is complete.

During discharge mode, the following function is self-tested.

• Heater (Alarm 44)

During float charge mode, the following function is self-tested.

• Fuse (Alarm 29)

During normal or safe mode operation, the following functions are self-tested.

• Safety redundant channel (Safe mode and alarm 47)

• Software and Parameters CRC invalid (Safe mode and Alarm 47)

• Memory check invalid (Safe mode Alarm 47)

Cell voltageVdc Alarm #

1.691 1 BMST reset2.150 13 BMST or charger reset2.550 12 auto reset (IMD = 0)3.0004.0004.050 10 auto reset (IMR = 0 @ 4.08 V)4.150 11 auto reset (forbidden charge)4.244 1 BMST reset

Module temperatureºC ºF Alarm #

- 40 - 40 16 auto reset- 30 - 22 9 auto reset- 10 14 8 auto reset55 131 6 auto reset75 167 7 auto reset85 184 1 BMST reset

Module voltageVdc Alarm #42 36 BMST or charger reset5657 35 auto reset (forbidden charge)

Module currentA Alarm #

- 63 46 auto reset- 53 2 BMST or charger reset

1.1 x IMD* 24 BMST or charger reset1.1 x IMR** 23 auto reset

53 2 auto reset63 46 auto reset

fuse*** 29 BMST or charger reset

Legend

Redundant hardware alarm (mosfet contactor opens)Major alarm (mosfet contactor opens)Warning alarm (signal only)Normal operation range

* see section Maximum discharge current** see section Maximum re-charge current*** see section System level and cell level current interrupt devices

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The Evolion is designed to provide low power to the application for autonomies ranging from 2 hours and 5 days. When providing this

duty, the voltage of the Evolion operates with the typical voltage range of a 48 V nominal telecom bus.

5.1 Normal operating voltage limitsThe Evolion operates in a range of 42 Vdc to 56 Vdc measured on the module terminals.

At 56 Vdc or an average cell voltage of 4.0 Vdc, the state of charge (SoC) is 100 %. In that state, the charge current accepted by the

Evolion is approximately equal to the internal electronic load and the cells’ self-discharge rate, which is typically less than 0.1 A.

At 42 Vdc or an average cell voltage of 3.0 Vdc, the SoC is 0 %. A low voltage disconnect (LVD) is automatically operated anytime a

module decreases to 42 Vdc (alarm #36). In that case, the Evolion module will remain active in safe mode until it automatically goes

into sleep mode to avoid over discharge.

The operating voltage must be higher than 49 Vdc to keep the cell balancing circuits active during re-charge. The typical float voltage

range is 54.6 (86% SoC) to 56.0 Vdc (100% SoC). The maximum State of Charge (SoC) of the Evolion is directly proportional to the

charge set point voltage. For every 1 V less than 56.0 V, the Evolion will stabilize at approximately 10% less than 100% SOC.

5.2 Cell self dischargeThe cell self-discharge rate depends on the temperature.

Temperature (°C/°F) % per week 20/68 0.60

40/104 0.85 0.85

5.3 Open Circuit Voltage (OCV) as a function of State of Charge (SoC)The measured OCV is directly proportional to the %SoC. A linear approximation can be used. See the table and diagram below.

OCV intercept (Fractional %SOC = 0) 46.62 VOCV Slope (0 to 1 where 1 = 100 %) 9.38 V per %SOC

5. Cell and module voltages

%SOC

OC

V (o

pen

circ

uit v

olta

ge)

0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00

56

55

54

53

52

51

50

49

48

47

46

45

44

43

42

OCV (Linear) = 9.38 x (fractional %SOC) + 46.62

OCV of the Evolion module

Linear (Approximation)

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The module OCV can be measured at the terminals, by turning the unit ON. While under load, an approximation of the OCV can be

measured if the current, either charge or discharge, is less than 4.9 Amps (at 25 ºC and higher).

The internal resistance of the Evolion module varies with temperature and age due to the change in the cells’ electrochemical

impedance. About ½ of the total Evolion resistance is associated to the cells at 25 ºC. The internal resistance increases approximately

20 % when at 10 ºC and decreases by approximately 20 % when at 55 ºC. It is independent of the SoC.

Additionally, the internal resistance increases in normal aging during its useful life. The typical end of life resistance is approximately

double when 20 % of its beginning of life capacity is lost over its useful life.

Module T (°C / °F) Internal resistance (Ri) at beginning of life (± 15 %)25 / 77 0.045 Ω

When the network voltage is lower than the Evolion’s terminal voltage, the module begins discharging. The available discharge

capacity is utilized to a low voltage cut-off at 42 Vdc.

The available capacity is a function of discharge current. See Figure 6 for the typical discharge characteristics representing runtimes

of approximately 2 hours (1750 W), 4 hours (925 W), 8 hours (485 W) and 16 hours (240 W).

6. Internal resistance

7. Discharging

Figure 6. The typical discharge characteristics of the Evolion at 25ºC.

% of Nominal Capacity

Uni

t Vol

tage

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 110%

5655545352515049484746454443424140

Nominal Capacity = C8 = 77Ah

1750 W

925 W

485 W

240 W

The discharge characteristics at different temperature are show in Figure 7. The factor affecting these characteristics is the internal

impedance of the cells.

Note: The internal heater maintains the Evolion’s internal temperature higher than 10 ºC. Discharge curves at less than 10 ºC are for

information and not representative of normal operation mode.

The discharge starts and continues until one of the following conditions is met.

• The network voltage becomes equal to or higher than the module voltage

• The battery voltage reaches 42 Vdc or a cell voltage reaches 2.5 Vdc

• The ON/OFF button is pressed for at least 4 seconds

17

% of Nominal Capacity

Uni

t Vol

tage

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 110%

56555453525150494847464544434241403938373635

Nominal Capacity = C8 = 77Ah

0ºC

+ 5ºC

+ 25ºC

+ 40ºC

Figure 7. Discharge characteristics of the Evolion at 1750 W and at different temperatures.

7.1 Discharge performance factorsThe Evolion has a rated capacity and energy based on a fully charged battery at 56 Vdc and at 25°C (77°F) when discharged at the 8

hour discharge rate for 8 hours of runtime to a 42 Vdc cut-off. When conditions deviate from this, the available capacity on discharge is

affected and can be accounted for by the following derating factors.

Variable Type Description Diagram

fT

Low temperature derating without heater operation

Accounts for the decrease in utilized discharge capacity between 10°C to 25°C (50°F to 77°F). External factor.

fTh

Low temperature derating with heater operation

Accounts for the decrease in utilized discharge capacity below 10°C. External factor.

fVch

Lower than 56.0 Vdc charge voltage set point

Accounts for the lower state of charge encountered when the charge setpoint is below 56 Vdc. External factor.

fEODV

Higher than 42.0 Vdc discharge cut-off voltage

Accounts for the decrease in the utilized discharge capacity when the discharge cut-off voltage is higher than 42.0 Vdc. External factor.

faging

End of life performance Accounts for the guarantee of performance at the end of predetermined life (years). External factor.

fIL

Internal loadAccounts for internal load of the Evolion or the heartbeat load for the micro circuits. Accounted for in the performance table or rate table.

All derating factors except fIL are external factors and must be accounted for separately when conducting a sizing calculation. The

factor fIL is automatically included in the performance table or rate table and does not need to be applied separately. See chapter

Battery sizing for more details on the application of these derating factors.

To estimate the value for each external derating factor, use the graphs in Appendix D.

Important note: Pressing the ON/OFF button while the module is loaded with charge or discharge current may damage the power

board. It is recommended to breaker open the load or rectifier output before pushing the ON/OFF button.

• The maximum discharge current is exceeded (see section Maximum discharge current)

18

7.2 Maximum discharge currentA maximum discharge current is defined for the Evolion module. This maximum level optimizes the useful life of the Evolion and

particularly for frequent cycling applications. If the maximum re-charge current (with some included tolerance) is ever encountered by

a module, it will automatically stop the discharge (alarm #24) from continuing by opening the electronic switch (mosfet). See section

Safety limits during operation for more details.

IMD is the maximum discharge current.

The Figure 8 shows the maximum discharge current in the operating temperature range.

Each module measures and controls its own maximum discharge current protection.

See section Thermal characteristics for more details about current limits associated with module temperature.

Figure 8. The maximum discharge current of the Evolion as a function of module temperature.

7.3 Low voltage disconnectA low voltage disconnect will open the electronic switch (mosfets) when the module voltage decreases to 42 Vdc. When actuated, the

module continues operation in safe mode. In safe mode, the module is awake (voltage at the terminals, LED’s operating, RS485 active,

etc.) and waiting for AC power to return when it will accept the charge current available from the rectifier output. In the safe mode, the

module will consume 65 milli-amps while remaining awake and waiting for the rectifier output.

Eventually, the module will transition to sleep mode, if one cell ever decreases below 3.0 V for more than 3 hours while in safe mode,

and in this case the internal electronic load is minimized (120 micro-amps). This prevents a higher internal electronic self-discharge

rate which forces cells to decrease below a critical low voltage too fast. In the sleep mode, the module will automatically wake-up and

begin nominal mode operation when the charger/rectifier power returns.

Important note: If the module turns OFF by reaching the low voltage disconnect (42 Vdc), it is necessary to begin re-charging within 14

days. The module may become damaged due to cell over discharge and in that case it will need to be replaced.

Module temperature (ºC)

(ºF)

IMD

(Am

ps)

-40 -30 -20 -10 0 10 20 30 40 50 60 70

-40 -22 -4 14 32 50 68 86 104 122 140 15850

45

40

35

30

25

20

15

10

5

0

Internal heater operation

IMD

19

When the network voltage is higher than the Evolion terminal voltage, the module begins charging. The Evolion re-charges with a

typical constant current/constant voltage (CC/CV) profile. The maximum and recommended re-charge set point is 56.0 Vdc +/- 0.5%.

The temperature compensated voltage control is not necessary. There is no risk of thermal runaway in float operation since there is

no heat producing side reactions. Unlike traditional technologies that accept overcharge current and consume water and generate

hydrogen and oxygen gas, the Li-ion electrochemistry will not accept overcharge current or spill any excess energy after it reaches

a full charge state or even while re-charging in any phase. When it is fully charged to its setpoint voltage (56.0 Vdc = 100 %), no more

current will be accepted by the cells (see Float mode).

During re-charge and until it is fully charged, the Evolion accepts charge current with close to 100 % coulombic efficiency. It is the

same efficiency at all operating temperatures. The maximum SoC it will attain is equal to the set point voltage (see chapter Open

Circuit Voltage (OCV) as a function of State of Charge (SoC)). If the re-charge set point is less than 56 Vdc, the maximum obtained %SoC

of the Evolion will also decrease. It decreases approximately 10 % for each 1 volt less than 56.0 Vdc. The re-charge set-point should

always be higher than 49 Vdc to make sure the cell balancing circuits will remain active during charge operation.

An example of the CC/CV re-charge characteristics is shown in Figure 9. It is the typical characteristics of the fast charge mode using

32 A of re-charge current per module. In this example, the Evolion is fully charged in approximately 3 hours. With 100 % coulombic

charge efficiency, with every 1 Ah re-charged there is 1 Ah of discharge capacity available to be utilized on the next discharge.

8. Charging

Figure 9. The typical CC/CV re-charge characteristics of an Evolion

8.1 Maximum re-charge current (IMR)The maximum re-charge current (IMR) gives the maximum allowed re-charge current for the fast charge mode. This maximum current

level is defined to optimize the useful life of the Evolion and to ensure safe operation, in particular for frequent cycling applications. Figure

10 illustrates 3 different curves, i.e., IMR, 0.85 x IMR and 0.75 x IMR.

In general, avoiding the charge regulated mode in operation is the best way to guarantee the highest efficiency offered by the Evolion.

If charge regulated mode ever becomes active, a large part of the re-charge energy will be consumed as heat and dissipated on the

front heat sink. To avoid the charge regulated mode, controlling the output current of the rectifier shelf is necessary. Controlling

the output to limit the available re-charge current can be done by either dimensioning the installed rectifier capacity or setting the

re-charge current set point. Use the following as a guide.

Charge time (h)

Uni

t vol

tage

(V),

Cur

rent

(A)

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2

60

54

48

42

36

30

24

18

12

6

0

100%

90%

80%

70%

60%

50%

40%

30%

20%

10%

0%

% Available Capacity

Charge Amps

Unit Voltage

20

IMD. In general operating at or close to IMR risks activating the charge regulated mode. For all practical purposes, operating with IMR is

not recommended. However, for applications using only one installed Evolion and where cycling is infrequent (once per week or longer

interval), if operating with IMR, it should avoid the charge regulated mode since a re-charge current margin factor is used in the Evolion.

0.85 x IMR. The default setting for this factorized IMR is 0.85 multiplied by the IMR. This factor (0.85) can be changed in each Evolion

using the Evolion Toolbox software. In operation, this factorized value of IMR. is available through the RS485/Modbus communication

bus of the Evolion. It is typically used as output current control parameter. If ever the output current of the power system ever

becomes equal to or above the 0.85 x IMR value, then the output charge current should be adjusted lower in order to avoid the charge

regulated mode.

0.75 x IMR. This guideline of IMR is the recommended level of maximum charge current when operating without communication control

with the recifier power system. The maximum re-charge current setpoint of the power system or maximum installed rectification for

re-charge and load can be determined using this guideline in combination with the maximum (or minimum) anticipated application

temperature. For example, if the highest temperature anticipated is 60 ºC, the corresponding 0.75 x IMR value is approximately 25 Amps

per Evolion module. So it would follow that the maximum installed output power or the set point for the maximum re-charge current

would use this for the maximum value. In this case, the charge regulated mode should be avoided when operated in the anticipated

temperature range.

For the charge regulated mode, if the IMR is ever encountered by an Evolion module, it will automatically activate the charge regulated

mode of operation. In this mode, the current will decrease to approximately 4 Amps (with the set point voltage at 56 Vdc). The

re-charge time will be approximately 24 hours to reach a full state of charge if fully discharged. When the charge regulated mode

is active, the module will direct connect once every minute in order to check if the current is still too high. If it is, it returns to charge

regulated mode.

The maximum allowed re-charge current is a function of the module temperature. See Figure 10.

Figure 10. The maximum re-charge current of the Evolion

If the Evolion is connected at - 40ºC (- 40ºF), no charge will be accepted until the Evolion temperature increases. After connecting and

powering on, the heater will be activated ON (see chapter Internal heater). If the temperature is less than - 30ºC (- 20ºF), the module will

operate in forbidden charge mode until the temperature rises above - 30ºC (- 20ºF). After, charge current starts to be accepted.

When connecting several Evolions in parallel, the current sharing between branches will vary due to normal variations in the module’s

internal impedance, the module’s state of charge, the module’s temperature and the application conditions. To avoid the charge

regulated mode, make sure to right size the charger output or set the maximum charge current to never exceed 0.75 x IMR. At 0.75 x

IMR, it will sufficiently account for normal current sharing variations. See further details in chapter Massive paralleling.

For frequent cycling applications where several cycles are solicited from the Evolion each day, the maximum re-charge current must

be set in order to manage the thermal characteristics of the module. Use Table 1 as guide.

Module temperature (ºC)

(ºF)

IMR

(Am

ps)

-40 -30 -20 -10 0 10 20 30 40 50 60 70

-40 -22 -4 14 32 50 68 86 104 122 140 15850

45

40

35

30

25

20

15

10

5

0

Internal heater operation

0.75 x IMR

0.85 x IMR

IMR

21

8.2 Power system set pointsIn order to optimize the power system operation and set points with the Evolion, use Table 2 as a guideline.

Table 2. Power system set point guide

# Type Setting

a. Single level voltage 56.0 Vdc ± 0.5%

b. Temperature compensated voltage control Disabled or turned OFF.

c. Maximum re-charge current See Table 1 (to manage thermal behavior)

d. Ramp in voltage/current (soft start)

When the AC powers ON, output voltage/current should ramp up to single level voltage over at least 1 minute.

e. Default rectifier output voltage When AC powers ON, if the rectifier controller is not available or working, make sure to set the default rectifier output voltage to 46 V maximum.

f. Low voltage disconnect (if used) 45 Vdc ± 1%

8.3 Re-charge timeThe re-charge time needed depends on the %DOD, available charge current and re-charge mode (charge regulated or fast charge). For

the charge regulated mode, a minimum of 24 hours is required for re-charge of the Evolion, from a full discharged state. In charge

regulated mode, the current accepted by the Evolion is approximately 4 Amps.

When in fast charge mode, the re-charge time is a function of the re-charge current available during the constant current phase and

%DOD of the last discharge. See Figure 11.

Figure 11. The re-charge time to reach full state of charge of the Evolion.

Depth of discharge (%)

Tim

e to

a fu

ll sta

te o

f cha

rge

(h)

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%

5

4

3

2

1

0

42 A

32 A

26 A

20 A

Table 1. Maximum re-charge current to manage thermal behavior of Evolion

Cycling Frequency Maximum allowed Amps per Evolion (Note 1)

More than 4x per day 163x to 4x per day 212x to 3x per day 241x to 2x per day 32Less than 1x per day Less than IMR

Note 1: The re-charge current can never be above IMR to avoid charge regulated mode of operation. Make sure to use the lowest value.

22

When integrating the Evolion in the application make sure to avoid obstructing all of the vent ports.

It is recommended to discuss venting strategy with your Saft representative in order to conclude on the need to implement venting

channels and suppression systems. See more details in the chapter Cell Venting in operation.

The Evolion is a sealed battery system. In normal operation the module never releases any gas.

The cells are designed to open and vent if a maximum internal cell pressure is ever encountered. In the controlled venting process,

the cell’s internal pressure will equilibrate with the atmosphere permitting the release of the cell gas. The module is designed with

channels and vent ports in order to allow the gas to escape from the module. See figure below.

9. Gassing and ventilation

8.4 Heat sink dissipation in charge regulated modeWhen charge regulated mode is active, the heat sink on the front face dissipates the excess charge energy when the re-charge current

decreases to approximately 4 Amps.

The generated heat is a function of the module temperature. The following table summarizes heat dissipated to the environment from

the heat sink when the network voltage is set at 56.0 Vdc charge level.

Ambient temperature (ºC) Dissipated power (Watts)0 22.7

10 20.5

20 18.2

25 17.0

30 15.9

40 13.6

50 11.4

60 9.1

23

9.1 Cell venting in operationThe probability for a cell venting during operation in the Evolion is very low. When considering the redundant and independent safety

mechanisms included on the cell level and the system level, there is a zero probability that an external influence of voltage or current

will force the cells in the Evolion to an unsafe state to vent. Based on history and experience, the only mechanism that would cause a

cell to vent and release gas is an internal cell short.

9.2 The probability of an internal shortIf a cell shorts, it will discharge rapidly and cause the temperature to rise quickly. At one point the maximum cell pressure will be

exceeded and the cell will vent gas.

The calculated probability of a single cell to experience an internal Short Circuit (SC) is linked to the number of cell in the module and is

equal to,

λcell SC = 4.9x10-10 per hour

The probability for an internal SC event for a single Evolion module is equal to,

λEvolion module SC = (4.9 x 10-10) x (14 cells) = 6.9 x 10-9 per hour

Important note: The electrolyte is flammable.

Important note: Never expose the Evolion to a temperature higher than 80°C (176°F). The electrochemistry may become unstable.

In the very low probability case of a cell internal short and venting, the Evolion’s cell pack is designed to prevent propagation of a cell

venting event to an adjacent cell.

9.3 Released gas characteristicsIn case of a cell venting event and the released gas is assumed to combust completely (worst case assumption), the gas composition

released through the Evolion vent ports is given in the following table.

Gas element Symbol % by volume

Nitrogen N2 65 %

Carbon dioxide CO2 27 %

Carbon monoxide CO 3 %

Combustion residue - 5 %

Assuming the worst case of total combustion, the total gas volume is estimated to be 500 liters to 800 liters with a venting rate of

approximately 40 to 110 liters/second and it releases at approximately 300°C to 500°C (572°F to 932°F).

Important note: The combustion residue (conductive carbon dust) and high temperatures during a cell venting event may contaminate

or cause damage to other equipment in the same zone. To prevent contamination or possible damage, it is recommended to contain or

to exhaust the released to a safe area. Contact your Saft representative for further details.

The service life of the Evolion depends on calendar time usage and the cyclic duty. As the Evolion ages in use, the available capacity

decreases and its internal resistance increases. Both mechanisms are irreversible. For life estimations, the calendar aging and cyclic

aging are considered separately when discussing factors that affect each. It is considered that 20 % loss of capacity represents end of life.

The factors that impact the calendar aging are:

• %SOC

• Module temperature

10. Service life

24

Factor Impacts How it impacts life

%SOC Calendar life The higher the %SOC the lower the expected life and vice versa. Note that the expected life at 100 % SOC and 20 ºC is more than 20 years.

Module temperature Calendar life The higher the temperature the lower the expected life and vice versa.

Level of re-charge current Cycling life The higher the re-charge current the lower the expected life and vice versa.

%DOD Cycling life The higher the %DOD the lower the expected life and vice versa.

Factors included Impacts

Level of re-charge current Cycling life

%DOD Cycling life


%SOC Calendar life

Module temperature Calendar life

Since these factors vary greatly between applications, the Evolion’s life expectancy is expressed in calendar life and in cycling life,

separately. In that case, the cycling life is given and is independent of the temperature and %SOC. In the same way, the calendar life is

given and is independent of level of re-charge current and %DOD in cycling. See Figures 12 and 13.

Figure 12. The calendar life of the Evolion

The factors that impact the cyclic aging are:

• Level of re-charge current (% of IMR)

• Depth of discharge

The following table summarizes these factors and how they impact the life of the Evolion.

Figure 13. The cycling life of the Evolion

Temperature (ºC)

Cal

enda

r lif

e (y

ears

)

0 20 25 30 35 40

20

18

16

14

12

10

8

6

4

2

0

Evolion (100 % SOC)

Re-charge = 0.75 x IMREnd of life = -20 % capacity

Depth of discharge (%)

Num

ber

of c

ycle

s

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%

10000000

1000000

100000

10000

1000

25



%DOD Cycling life

%SOC Calendar life




%DOD Cycling life

%SOC Calendar life


Reported %SOH Corresponding %SOC

Figure 15. Operation life expectation with 4 cycles per day.

Figure 16. Evolion State of Health (SOH)

Figure 14. Operation life expectation with 1 cycle per day.

The total expected operational life can be estimated if the frequency of cycling is known. For this estimation, all four factors that affect life

are included. The curves given in Figure 14 and Figure 15 show few operating scenarios including 1 cycle per day and 4 cycles per day.

The Evolion includes a State of Health (SOH) alarm (Alarm 53) feature. The SOH at the beginning of life is 100 % and it is equal to the

Evolion having 100 % of its capacity available when fully charged. At the end of its life, the SOH signal is 0 % and it is equal to the

Evolion having 70 % of its beginning of life capacity. See Figure 16.

%DOD

%DOD

Ava

ilabl

e ca

paci

ty

Ope

ratio

nal l

ife (y

ears

)O

pera

tiona

l life

(yea

rs)

# of

Cyc

les

(kilo

-cyc

les)

# of

Cyc

les

(kilo

-cyc

les)

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100

20

18

16

14

12

10

8

6

4

2

0

20

18

16

14

12

10

8

6

4

2

0

100 %

33 %

20 %

0 %

100 %

80 %

76 %

70 %

0 %

0 %

-30 %

7.300

6.570

5.840

5.110

4.380

3.650

2.920

2.190

1.460

0.730

0.000

29.20

26.28

23.36

20.44

17.52

14.60

11.68

8.76

5.84

2.92

0.000

20ºC (68ºF)

30ºC (86ºF)

35ºC (95ºF)

40ºC (104ºF)

20ºC (68ºF)

30ºC (86ºF)

35ºC (95ºF)

40ºC (104ºF)

1 cycle per dayRe-charge rate = 0.75 x IMREnd of life = -20% capacitykcycles/year = 0.365

4 cycle per dayRe-charge rate = 0.50 x IMREnd of life = -20% capacitykcycles/year = 1.46

Aging fact: Saft NCA electrochemistry ages linearly with up to 30% decrease in available capacity.(warning alarm 53)

Calendar life limited

Calendar life limited

Cycling life limited

Cycling life limited

26

The Evolion communicates both a dry contact signal (alarming) and on an RS485/Modbus network as a slave.

For alarming, each Evolion module measures and controls its own alarm output signal. The alarm output signal is given both by

the LED’s and the RJ45 connectors on the front face. A complete list of alarm signals and troubleshooting guidelines are included in

Appendix E.

The alarm signals are either a warning alarm or a major alarm, can be commanded to operate the dry contactor on pin 7 and pin 8 of

the RJ45 connectors. This is a customer settable parameter. See Evolion DiagWinBMS & Bootloader communication software I/O for

more details on setting up pin 7 and pin 8 dry contactor.

The alarm signal is always available on the RS485 transmission bus as well. Using the Modbus communication protocol, the external

application can communicate with the Evolion. Refer to the Evolion communication user manual for more details.

Signal connections are made using the communication cable provided with each Evolion. Refer to the Evolion I/O (shipped with each

module) for more details and see the example in Figure 17.

11. Communication

Figure 17. Example of parallel connected Evolion using RJ45 connection cable.

The Evolion utilizes a black box function. The black box stores variable values from historical operation, such as SOC, temperature,

voltage, current, alarms, minimum, maximum or cumulative values of numerous parameters. The black box can only be accessed by

Saft qualified personnel. For more information, contact your local Saft representative.

12. Black box

Install RJ45 resistor cap provided for communication (end module) p/n 773455Application:

• Dry contact (pin7 & pin8)• RS485 bus (pin1 & pin2)• Wake up signal (pin3 & pin4)

Parallel connected RJ45p/n 772518

Type ProtocolTransmission protocol RS485Communication protocol ModbusPhysical connection RJ45

The Evolion allows communication to your personal computer and to the application.

27

13.1 Massive parallelingSince the Evolion operates stand alone and is not limited by an external BMS, massive paralleling for power or for capacity is possible.

If the total discharge does not exceed 130 A or 5 kW, connecting any number of Evolion on the same bus, in theory, is acceptable.

In practice, balancing the branches through cable matching and meticulous double checking during installation is necessary. An

unbalance branch can cause a cascading of overcurrent problems.

If the total discharge load exceeds 5 kW or 130 Amps case, the use of external current interrupt devices should be considered. Using

external current interrupt devices eliminate the risk of damaging the BMST power board or overloading the replaceable fuse (60 Amp).

Table 3 and Figure 18 summarize the paralleling constraints of the Evolion when massive paralleling.

13. Special operations

Total discharge load is less than 5 kW or 130 A Total discharge load is more than 5 kW or 130 A

Charge No external devices needed paralleling to increase capacity is OK.

Avoiding current limit mode is necessary.

• dimension maximum re-charger current to be 0.75 x IMR

• pilot the current limit feature on the output of charger using variable IMR_C from the RS485 bus

Discharge No external devices needed paralleling to increase capacity is OK.

Use external current interrupt device(s).

Interrupt device options may include:

(a) auto actng MCB (Saft specified)

(b) pilot contactor using RS485 bus or dry contactor signal

Table 3. Massive paralleling implementation guidelines.

Figure 18. Two conceivable ways to use external current interrupt devices with over 130 A or 5 kW of discharge load. See detailed description of (a) and (b) below illustration.

28

(a) Auto acting – breaker

This external interrupt method will allow the manual resetting of the external breaker if an overload condition exists. A single breaker

is used for each Evolion or on pair of parallel connected Evolions. The breaker acts with specific time/current characteristics. Consult

with your local Saft representative for more details on the breaker type.

(b) Contactor – RS485, dry contactor

This external interrupt method will allow the automatic opening and closing of an external contactor piloted by the RS485/Modbus.

The dry contact communication with the parallel connected Evolions will also work by using a low %SOC or 42 V LVD signal. Options to

use several distributed contactors or one main contactor is conceivable. If several distributed contactors are used, then the contactors

must act “simultaneously” when the opening signal is commanded.

13.2 Thermal characteristics in cyclingHeat is generated during charge and discharge. The amount of heat generated is directly proportional to the level of current and the

internal resistance of the Evolion. The Evolion may accumulate heat in frequent cycling applications.

For frequent cycling application limiting the current on charge and discharge will also limit the maximum steady state temperature of

the Evolion in cycling. A good rule of thumb is to not exceed 25 Amps of re-charge current per Evolion in applications where more than

2 cycles per day and less than 5 cycles per day are needed.

Examples of frequent cycling applications include poor AC grid cycling and hybrid power cycling. In both cases the Evolion charges and

discharges continuously from one cycle to the next where there is no/or little floating or resting between cycles.

In order to estimate the maximum temperature difference (dTmax) a correlation can be used to calculate it. The Evolion typically

reaches a peak temperature in frequent cycling at the end of the re-charge part of the cycle. After about 3 days of continuous cycling,

this peak temperature or dTmax will stabilize. To estimate this dTmax, the following equations can be used. First calculate Irms using

Equation 1 and the values of charge and discharge current planned for continuous cycling use (per each Evolion). After, plug the result

of Equation 1 into Equation 2 to estimate the dTmax.

Equation 1

Irms weighted average current for one cycle (result used to input to dTmax equation below)

ICh Charge current for one module (each cycle), from sizing output

IDch Discharge current for one module (each cycle), from sizing output

tCh Time on charge for 1 cycle, from sizing output

tDch Time on discharge for 1 cycle, from sizing output

tcycle Total time for one cycle (tCh + tDch)

Equation 2

dTmax Maximum expected stabilized temperature difference from the ambient environment

Irms weighted average current for one cycle

A correlation of dTmax to Irms is shown if Figure 19. The results of actual test data are indicated and compared to Equation 2.

Unit 1

bus

bus

Unit 2 Unit 3 Unit n

+

+ + + +

-

- - - -

29

Figure 19. Corelation of dTmax as a function of Irms.

The estimation of dTmax can assist in determining if the IMD or IMR may be a constraint in operation. For example, in a hybrid power

application, the higher the charger current lower the operation time. However, with the thermal limits of the Evolion, one must

anticipate whether the dTmax of the Evolion will force too low of a limit for IMR or IMD.

If the expected environment temperature, in one part of the season, is 40 ºC and the calculated dTmax is 18 ºC, then the Evolion should

be anticipated to reach and stabilize up to 58 ºC at the end of charge. Constraints of IMR and IMD at this stabilized temperature should

be reviewed to make sure they do not limit operation by activating regulated charge mode (exceeding IMR) or open circuiting during

discharge (exceeding IMD).

13.3 Adding modules to existing busWhen adding an Evolion to an existing power bus, the maximum voltage difference for the modules to be added is 2 V from the bus set

point. This maximum allowed voltage difference prevents the inrush current sharing between modules to exceed 44 A and thus avoid

the charge regulated mode. See Figure 20.

Figure 20. Schematic of maximum allowed voltage difference when connecting to existing Evolion on a charged bus.

OPTION 2 – For any number of direct connected Evolions, using the same length of cable for each will make sure to balance the resistance.

dV = 2V maximum

56 V

54 V

I rms

dT m

ax

0 5 10 15 20 25 30 35

35

30

25

20

15

10

5

0

dTmax (experimental measurements)

dTmax = 1.0549 (Irm

s)

Irms =

1 cycle for example

I2 Ch + I2 DchtDch

tcycle

tCh

tcycle

30

The Evolion automatically protects against abusive operation.

There are two basic approaches to size the Evolion. For autonomy sizing or frequent cycling sizing contact your local Saft

representative for further assistance.

14. Abusive operations

15. Battery sizing

Abusive operation Protection description

Reverse connection to power terminalsThe Evolion will not start if there is a reverse connection. It will remain in sleep mode. If the ON/OFF button is forced ON, then the Evolion will wake up in safe mode with Alarm 27 and 47.

External short circuit Replaceable fuse will act.

Temperature, voltage or current outside of acceptable range See chapter safety limits during operation and Appendix E Alarms and troubleshooting.

Connecting Evolion in series

Never install Evolion batteries in any series connections. Failure to follow these safety precautions may lead to irreversible damage of internal electronics and failure of built in safety features. If inadvertent series connects are noticed immediately disconnect batteries and run DiagWinBMS software to check health status of module.

Sizing method Typical applicationsAutonomy sizing Telecom backup good grid and poor grid, photovoltaic

Frequent cycling Consult with your local Saft representative for life and thermal optimization.

15.1 Autonomy sizingTo determine the # of Evolion modules needed to provide a minimum autonomy, use the following equation along with the performance

rate tables and external derating factors. See the chapter Discharge performance factors and the rate table and graphs in Appendix C

and D for more details.

31

An example is given:

The customer needs to backup a remote roadside cabinet (remote terminal) for 4 hours. The average yearly outside temperature is

29 ºC. The coldest temperature is 0 ºC. The load is 120 Amps. The performance should be guaranteed for 10 years.

32

Appendix A: Part number reference

Appendix B: Glossary

# Saft P/N Description

3. 771285 Fuse, replaceable, 60 A

4. 771473IO Installation and operation instructions

5. 771492 -xx

Evolion module, -xx is the parameter file variant.

-09 RS_speed = 1

-10 RS_speed = 0

-11 Standard

-12 Alarm #35 and #36 output to dry contact

6. 772309 Communication kit, USB key and converter cable

7. 772509 Evolion packaging box, UN3480

8. 772517 Cable NEG, 1000 mm, black cable, black heat shrink

9. 772518 Communication cable, inter module

10. 773455 RJ45 Resistor cap

11. 773456 Converter cable

12. 774884 Busbar kit, 4x Evolion, 1 meter communication cable to application

13. 780680 Cable POS, 1000 mm, black cable, red heat shrink

Term Definition

BMST Battery Management System Telecom

BMU Battery Management Unit (not used with Evolion)

DoD % Depth of Discharge

Dry contactor open or close signal, no voltage or current supplied, free contact

EOL End of Life

HMI Human Machine Interface

IMD Maximum Discharge Current

IMR Maximum Re-charge Current

LVD Low Voltage Disconnect

MBMM Master Battery Management Module (not used with Evolion)

OCV Open Circuit Voltage

PFC Potential Free Contact, referred to as dry contact sometimes

SEI Solid Electrolyte Interface or the passivation layer on the negative electrode

SMPS Switch Mode Power Supply

SMU Safety Monitoring Unit (not used with Evolion)

SoC % State of Charge

SOC State of Charge

SOH State of Health

33

Appendix C: Performance rate tables

Appendix D: Derating factors for sizing

fT – derating factor for temperature between 10ºC (50ºF) and 25ºC (77ºF). No derating factor is applied over 25ºC. Use either fT or fTh , both should not be applied.

Lowest temperature (ºC)

Der

atin

g fa

ctor

(fT)

10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

100%

99%

98%

97%

96%

95%

94%

93%

92%

91%

90%

2-hour rate

4-hour rate

8-hour rate

Performances are based on the typical capacity C8 = 77 Ah

Per

mod

ule 42 V

end voltageAutonomy (hours)

2 3 4 8 10 12 16 24Amps 37.4 25.1 19.0 9.63 7.74 6.48 4.89 3.24Watts 1810 1229 933 485 389 326 248 164Avg V 48.5 48.9 49.2 50.4 50.4 50.4 50.7 50.7

Per

mod

ule 42 V

end voltageAutonomy (days)

1 2 3 4 5Amps 3.24 1.59 1.04 0.76 0.60Watts 164 81 53 39 30Avg V 50.7 50.7 50.7 50.7 50.7

Performance rate tables include:- fIL (~ 2 % of rated Ah per 24 hours of runtime)- 56 V charge to fully charged state at 25˚C (77˚F)- 42 V cut-off at end of discharge and 25˚C (77˚F) at the beginning of discharge

34

fTh – derating factor for less than 10ºC taking into account the heater load. Use either fT or fTh , both should not be applied.

fVch – derating factor charge voltage lower than 56 V.

Charge voltage setpoint (V)

Autonomy (hours)

Der

atin

g fa

ctor

(fV

ch)

Der

atin

g fa

ctor

(fTh)

49 50 51 52 53 54 55 56

0 2 4 6 8 10 12 14 16 18 20 22 24

100%

90%

80%

70%

60%

50%

40%

30%

20%

10%

0%

100%

95%

90%

85%

80%

75%

70%

65%

60%

2-hour rate

4-hour rate

8-hour rate

Heater control

always ON control always OFF

- 40ºC 10ºC 15ºC 75ºC - 40ºF 50ºF 59ºF 167ºF ON OFF

35

fEODV – derating factor for cut-off voltage higher than 42 V.

faging – derating factor for aging.

Average environment temperature (ºC)

Autonomy (hours)

Der

atin

g fa

ctor

(fag

ing)

Der

atin

g fa

ctor

(fEO

DV)

0 5 10 15 20 25 30 35 40 45

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32

100%

95%

90%

85%

80%

75%

70%

65%

60%

55%

50%

100%

95%

90%

85%

80%

75%

70%

65%

60%

43.2 V

44.4 V

45.6 V

46.8 V

5 years

10 years

15 years

20 years

36

Appendix E: Alarms and troubleshootingUse the Evolion Toolbox software to diagnose active alarms. See Evolion Toolbox Software Technical Manual for more details.

n° Fault code is active (major alarm) with open electronic switch (mosfet); Evolion operates in safe mode.n° Warning alarm is active with closed electronic switch; Evolion operates in normal mode.Generic n°

Buffer n° Description Fault condition Possible cause and notes Recommended action guide

1 1Emergency Alarm (redundant hardware)

Emergency redundant hardware channel is active during 3 s

Cell voltage > 4.244 V ± 61 mV

Cell voltage < 1.691 V ± 48 mV

Temp. > 84.5 °C ± 1.9 °C

• Redundant safety feature independent of microprocessor indicating software may be faulty

• Too long period of rest after complete discharge (42 V cutoff)and before start charge

• Too much frequent cycling causing module temperature to stabilize too high

• Too high ambient temperature

• Cell may be imbalanced or balancing circuit may not be working

• Too high cell self-discharge in other cells

1. Correct fault condition.

2. Disconnect and remove Evolion from operation.

3. Push front face reset button or send a reset micro command (ON/OFF button can also reset the micro).

4. Continue operation without fault.

5. If fault persists, contact your local Saft representative.

2 2Battery Mosfets activation on short circuit

Battery current > 53 A during 2 s

• Redundant safety feature in microprocessor

• Refer to alarm 23 and 24 and 29

1. Disconnect Evolion.


3. Check replaceable fuse (replace if necessary).

4. OFF then ON charger output or OFF then ON Evolion (if module is offline).

5. Connect and continue operation without fault.


Fault codes are indicated here

37



6 3A cell is going over temperature – 1st level

Module temperature > 55 °C during 2 s

• Too much frequent cycling causing module temperature to stabilize too high particularly in high temperature environment

• Too high ambient temperature


2. Evolion auto resets after correction of cause and fault condition.



7 4A cell is over temperature – 2nd level

Module temperature > 75 °C during 2 s


• Refer to alarm 6Refer to alarm 6.

8 5A cell is going under temperature – 1st level

Module temperature < - 10 °C during 2 s

• Internal heater may not be working (refer to alarm 44)

• Module stored and installed in cold environment


2. Continue operation after installation to allow heater to operate (approx.. 8°C per hour).

3. Evolion auto resets after correction of fault condition.



9 6A cell is under temperature – 2nd level

Module temperature < - 30 °C during 2 s


• Refer to alarm 8Refer to alarm 8.

10 7A cell is going over charge – 1st level

Cell voltage > 4,05 V during 2 s

• Too high voltage setting on charge

• Cell voltage may be imbalanced or balancing circuit may not be working

• Refer to alarm 60

• At 4.08 V, IMR_C will be zero and as a result regulated charge mode will be active.


1. Check charger output voltage and correct fault condition.

2. Continue float operation for 1 or a few days (depends on level of imbalance).

3. Voltage must be above 3.5 V per cell to have balancing circuits active.

4. Temperature of the module must be lower than 55° C for balancing circuits to be active.

5. Evolion auto resets after correction of cause and fault condition while in floating.

6. Alarm will be reset automatically after the cell voltage difference is within allowed limit.



11 8A cell is over charge – 2nd level

Cell voltage > 4,15 V during 2 s


• Forbidden charge mode active


Refer to alarm 10

38



12 9A cell is going under voltage

Cell voltage < 2,55 V during 2 s

• Too long period of rest after complete discharge (42 V cutoff) and before start charge

• ON/OFF button left ON in long storage

• Too high cell self-discharge

• Too high cell dispersion at end of complete discharge


• At 2.5 V, IMD_C will be zero and as a result the electronic switch will open in safe mode.


• At 3.0 V, the module will go into sleep mode automatically after 1 hour.

1. This alarm is active normally in storage or when not connected in operation or at the end of discharge.

2. Begin refreshing charge procedure immediately

3. Evolion auto resets after correction of cause and fault condition.



13 10A cell is under voltage

Cell voltage < 2,15 V during 2 s



1. This alarm is active normally in storage or when not connected in operation.

2. Begin refreshing charge procedure immediately

3. Reset the module.a. For single connected module,

turn output power from rectifier OFF and then ON and after the fault should reset.

b. For parallel connected modules, BMST reset or Evolion OFF/ON is necessary



14 11 Mosfet temperature out of range

If at least one mosfet has a temperature out of range during 1s (-40° C < T < 120 °C)

• Sensor failure short circuit or open

• BMST power board may be damaged

• Refer to alarm 40 and 41

1. Contact your local Saft representative if it persists

15 12 Cell voltage out of range

If at least one cell has a voltage out of range during 2s (1.5 V < V < 4.5 V)

• Voltage measurement circuit failure

• BMST busbar board may be damaged

• Refer to alarm 10, 11, 12 and 13


1. Contact your local Saft representative if it persists.

16 13 Cell temperature out of range

If at least one cell has a temperature out of range during 2 s (- 40 °C < T < 120 °C)

• Sensor failure short circuit or open


• Refer to alarm 6, 7, 8 or 9



19 14 High battery supply BMST supply voltage > 32 V during 0.5 s

• Internal fault check function

• Possible faulty BMST electronics


20 15 Battery 12 V supply is low

BMST supply voltage < 11.5 V during 0.5 s




39



23 16 Over current in charge

Measured charge battery current > MAX(1.1 x IMR ; 0) during 1 s

• Regulated charge mode active (normal mode of operation)

• Transient or continuous charge current available from the rectifier output exceeds maximum allowed charge current with margin factor

• Voltage between parallel connected modules too high

• Refer to technical manual sections for control of maximum output charge current control as a function of IMR_C or IMR factorized (in function of the module temperature).

• Every 1 minute the fast charge mode will be temporarily active.

1. If Modbus/RS485 is used, check communication cable between modules and SMPS controller is correct.

2. If no Modbus/RS485 is used, correct the maximum current output settings of the SMPS.

3. If the total re-charge current available exceeds 130 A, regardless of the number of parallel connected Evolion, the output current should be regulated to not operate with charge regulated mode active.

4. Contact your local Saft representative for further details.

24 17 Over current in discharge

Measured discharge battery current > MAX(1,1 x IMD ; 0) during 1 s

• Transient or continuous discharge current exceeds maximum allowed discharge current with margin factor


1. Check and re-size as necessary the number of Evolion necessary for the discharge load. Consult with your local Saft representative as necessary.






25 18 SOC invalid SOC calculation detected invalid • Software issue 1. Contact your local Saft

representative if it persists.

26 19 SOH invalid SOH calculation detected invalid • Software issue 1. Contact your local Saft

representative if it persists.

27 20 Charger overvoltageBattery voltage > 57 V during 2 s or Reverse polarity

• Self-test on startup feature


• Evolion connected with reverse polarity to output power and powered ON with ON/OFF

• Forbidden charge mode is active.

1. Correct fault condition by setting output voltage to the recommended level.

2. Evolion auto resets (must be in forbidden charge or regulated charge mode) after correction of cause and fault condition.



40



29 21 Fuse blown

Voltage between cells and network is different by ± 2 V during more than 10 minutes.

• Charge or discharge current exceeded the maximum time = f(current) curve for replaceable fuse.

• Evolion connected to output of rectifier and turned ON when AC power is OFF.


1. Disconnect Evolion and turn OFF.

2. Check replaceable fuse (replace if necessary).

3. Turn ON Evolion. The alarm is auto reset after the good fuse is detected in place.

4. Connect and continue operation without fault.


33 22 Low SOC – 1st level SOCmin ≤ 20 % during 3 s

• The SOC of the Evolion is below 20 % in storage or in normal operation.

• Long storage without refreshing charge.

• Long discharge consuming 80 % of the full charged capacity.

• Too short time re-charge after a full discharge.

1. Re-charge above 20 %.

2. Evolion auto resets after correction (5 % hysteresis) of cause and fault condition.



34 23 Low SOC – 2nd level SOCmin ≤ 10 % during 3 s

• The SOC of the Evolion is below 10 % in storage or in normal operation.

• Long storage without refreshing charge.

• Long discharge consuming 90 % of the full charged capacity.

• Too short time re-charge after a full discharge.

1. Re-charge above 10 %.

2. Evolion auto resets after correction (5 % hysteresis) of cause and fault condition.



35 24Battery voltage above limit

Battery voltage > 57 V during 2 s

• Forbidden charge mode active


1. Correct fault condition setting output voltage at recommended level.

2. Evolion auto resets after correction (must be in discharge mode to decrease cell voltage) of cause and fault condition.



36 25 Battery voltage below limit

Battery voltage < 42 V during 2 s

• Low voltage disconnect in normal operation for complete discharge

1. Begin re-charge within 14 days of reaching this limit.






41



37 26SOC not adjusted during the required time

SOC not adjusted for more than 1 month

• Continuous cycling with charging and discharging current always above allowed limit.

• No floating mode encountered for minimum allowed time.

1. Perform a full charge with more than 5 minutes in floating mode.

2. Alarm is automatically cleared.



40 27 A mosfet is going over temperature

Mosfet Temperature > 100 °C during 1 s

• Internal fault detection function

• Faulty BMST power board

• Ambient temperature too high

1. Continue operation.


41 28 A mosfet is over temperature

Mosfet Temperature > 110 °C during 1 s

• Redundant safety feature of microprocessor


1. Continue operation to allow temperature to decrease in safe mode.


44 29 Heater failure The heater self-test failed


• Faulty BMST busbar board

• Safety thermostat faulty/open

• Ambient temperature too high

1. Continue operation to allow temperature to decrease.


46 30Battery current sensor out of range (lost)

Battery current < -63 A OR > 63 A during 2 s

• Current measurement circuit failure


• Refer to alarm 23 and 24


47 31 Autotest failure

If Built-In-Tests (PowerON, Continuous) failed (it is considered as failed after 3 consecutive unsuccessfull tries)

• See self-test section in technical manual for details.

1. Disconnect the Evolion from application.

2. Turn the Evolion OFF and then ON again.



53 32 Low SOH SOHmin < 20 % during 3 s

• Life time of the Evolion is within 20 % of the End of Life (EoL).

1. Module to be checked for replacement

2. Contact your local Saft representative.

54 33 Inconsistent temperatures

Maximum module temperature gap > 10 °C during 2 s


• Cell operation issue

• Faulty BMST busbar board

1. Continue operation until temperature decreases below limit.


55 34 Low µc supply voltage (3.3 V)

If 3.3 V supply is enable and if 3.3 V is not detected for 0.1 s




56 35 Low µc supply voltage (5 V)

If 5 V supply is enable and if 5 V is not detected for 0.1 s




42



60 36 Unbalanced cells

[NewSocMaxCalculate = 1 (soc refreshed)] AND [minimum SOC > 25 %] AND [cell voltage difference > 100 mV] AND [minimum cell voltage > 3.5 V for 2 s]


• Possible faulty BMST busbar board

1. Continue float operation for 1 or a few days (depends on level of imbalance).

2. Voltage must be above 3.5 V per cell to have balancing circuits active.

3. Temperature of the module must be lower than 55 °C for balancing circuits to be active.

4. Alarm will be reset automatically after the cell voltage difference is within allowed limit.


68 37 IMD/IMR from algorithm are invalid

If the IMD/IMR calculation function is in error state and reinitialization failed

• Software issue 1. Contact your local Saft representative if it persists.

70 38Outputs from the AlgoSaftGetPowerPred function are invalid

If the Power Prediction calculation function is in error state


71 0Microprocessor cycle overtaking or cycle error

Software cycle duration is greater than expected duration (according to the mode)


Appendix F: BMST versionsUSB Key P/N BMST software

version Evolion P/N DiagWinBMS software Bootloader HMI RS485/USB

converter

772520-01 V0.51 771492-01 V1.16 N/A Brainboxes

772520-04 V0.54B 771492-04B V1.19C N/A Brainboxes

772520-05 V0.55 771492-05 V1.19F V1.13 FTDI

772520-06 V0.56 771492-06 V1.19F V1.13 FTDI

772520-07 V0.57 771492-07 V1.19H V1.13 FTDI

772520-08 V0.58 771492-08 V1.19H V1.13 FTDI

772520-09 V0.59 771492-09 V 2.9 V.1.17 FTDI

77520-09 (latest- REV) V1.00 771492-09 ** Evolion

Toolbox software V1.17 FTDI

** - variable indicates parameter file version

Saft12, rue Sadi Carnot93170 Bagnolet - FranceTel. : +33 1 49 93 19 18Fax : +33 1 49 93 19 64www.saftbatteries.com

Doc No.: 21880-2-0115

Edition: January 2015

Data in this document is subject to change without notice and becomes contractual only after written confirmation.

Photo credits: Saft, Fotolia

Produced in the UK by Arthur Associates Limited

Société par Actions Simplifiée au capital de 31 944 000 €

RCS Bobigny B 383 703 873

As part of its environmental commitment, Saft gives priority to recycled raw materials over virgin raw materials, reduces its plants’

air and water releases year after year, minimizes water usage, reduces fossil energy consumption and associated CO2 emissions, and

ensures that its customers have recycling solutions for their spent batteries.

Regarding industrial batteries, Saft maintains long-standing partnerships with collection companies in most EU countries, in North

America and in other countries. This collection network receives and dispatches our customers’ batteries at the end of their lives to

fully approved recycling facilities, in compliance with the laws governing trans-boundary waste shipments.

Saft has selected a recycling process for industrial lithium-ion cells with very high recycling efficiency. A list of our current collection

points is available on our website. In other countries Saft assists users of its batteries in finding environmentally sound recycling

solutions. Please contact your sales representative for further information.

Saft is committed to the highest standardsof environmental stewardship

Documents

Evolion Li-ion battery - Saft BatteriesThe Evolion is a Li-ion battery system. The battery system or module includes two main parts, a Li-ion cell pack and electronics. Both combine