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An Expert of Energy Storage Solutions. Narada lead-carbon battery Dedicated to energy storage By Walter. Jin [email protected] +86-18917365151

Narada lead carbon battery

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Page 1: Narada lead carbon battery

An Expert of Energy Storage Solutions.

Narada lead-carbon battery

Dedicated to energy storage

By Walter. Jin

[email protected]

+86-18917365151

Page 2: Narada lead carbon battery

The REX-C series battery

Page 3: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Narada REX-C series batteries are deigned for application of energy storage with patented lead-carbon technology,

combined features of both capacitor and lead acid battery, especially in condition of Partial Status of Charge (PSoC)

• No sulfation problem at negative

• Design life above 20 years (20oC)

• 5~10 times more lifespan at PSoC

• High specific power, fast charging

• About 40% more charge acceptance

About Renewable Energy eXtra-Carbon battery

Product definition Lead-carbon battery series

Page 4: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Product overview of 2VREXC Lead-carbon battery series

The product family of Renewable Energy eXtra-Carbon (2V series)

Page 5: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Illustration of dimension Lead-carbon battery series

231mm

40

8m

m 3

96

mm

120mm

13

0m

m

282mm

Dimension of REX-C 1000

Page 6: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Model Voltage Rated capacity Dimension (L*W*H) Weight

REXC-200 2V 200Ah 227.0*96.0*303.0mm 17.0kg

REXC-400 2V 400Ah 227.0*170.0*303.0mm 32.0kg

REXC-600 2V 600Ah 231.0*180.0*408.0mm 46.0kg

REXC-800 2V 800Ah 231.0*231.0*408.0mm 60.0kg

REXC-1000 2V 1000Ah 231.0*282.0*408.0mm 75.0kg

REXC-1500 2V 1500Ah 232.0*322.0*514.0mm 110.0kg

REXC-2000 2V 2000Ah 232.0*456.0*514.0mm 155.0kg

REXC-2000 REXC-1000 REXC-400

Product overview of 2VREXC Lead-carbon battery series

Page 7: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Brief information

12REXC series batteries is 12V version of REXC series

products, which is slim and compact, suitable for on-

site installation. It is especially designed for cabinet

unit, widely applied in residential energy storage.

Product overview of 12VREXC Lead-carbon battery series

Page 8: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Model Voltage Rated capacity Dimension (L*W*H) Weight

12REXC70 12V 60Ah 280.0*180.0*244.0mm 30.0kg

12REXC120 12V 100Ah 290.5*224.0*294.0mm 56.0kg

12REXC200 12V 165Ah 438.0*224.0*294.0mm 79.5kg

6REXC240 6V 200Ah 264.0*224.0*294.0mm 58.0kg

6REXC300 6V 250Ah 338.0*224.0*294.0mm 61.0kg

Product overview of 12VREXC Lead-carbon battery series

12REXC200 6REXC300 12REXC70

Page 9: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

With a wide range of output power

Modular design for easier configuration

Robust design with high system reliability

Compact and less space occupancy

It is an economical storage solution, consists of

12REXC series batteries, whose capacity could be

freely configured according to actual requirement

Brief information

Residential storage cabinet Lead-carbon battery series

Page 10: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

DC

AC

Hybrid inverter

PV array

Load

Batteries

Smart meter Grid

Monitoring

Residential storage solution Lead-carbon battery series

Page 11: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Storage cabinet in the system Lead-carbon battery series

Inverter

Battery

cabinet

PV module

Monitoring

Load

Switch

Smart meter

Page 12: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Illustration of installation Lead-carbon battery series

Step one

Fix two side columns

on to bottom board

Step two

Insert back board into

the slot of side column

Step three

Load four pieces of

12V of REXC batteries

Page 13: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Dimension of storage cabinet Lead-carbon battery series

16

17

.0m

m

1124.0mm 361.5mm

53

9.0

mm

Page 14: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Voltage Capacity Battery type Rated voltage Cabinet units

Low voltage series system

4 kWh 12REX200

48V 1

5 kWh 60V 2

6 kWh 6REX300

48V 2

9 kWh 72V 3

Medium voltage series system

12 kWh 12REX200 144V 3

18 kWh 6REX300 144V 6

7 kWh 12REXC70 228V 5

High voltage series system

8 kWh 12REXC70 264V 6

24 kWh

12REX200

288V 6

28 kWh 336V 7

32 kWh 384V 8

Residential storage cabinet Lead-carbon battery series

Page 15: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Detailed schema of REXC Lead-carbon battery series

Safety

valve 1

Negative

terminal

Positive

terminal

Battery

housing

Safety

valve 2

Battery

cover lid

Battery

bus-bar

Battery

terminal

Page 16: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Batteries comparison-1 Lead-carbon battery series

Parameter REXC HTB OPzV Conventional

Technologies AGM AGM Gel AGM

Service life (80%DOD) 5 years 3.5 years 4 years 0.5 years

Temp. Range -40℃ to 55℃ -40℃ to 80℃ -40℃ to 55℃ -40℃ to 55℃

Initial Capacity ★★★ ★★★ ★★ ★★

Internal resistance ★★★ ★★★ ★★ ★★★

High current ★★★ ★★★ ★★ ★★★

Fast charging ★★★ ★★★ ★ ★★

PSOC performance ★★★★ ★★★ ★★ ★

Anti-water loss ★★★ ★★★★ ★★ ★★

Anti-therm. runaway ★★★ ★★★★ ★★★ ★★

Cycle life >80%DOD ★★★★ ★★ ★★★ ★

Cycle life <80%DOD ★★★★ ★★★ ★★★ ★★

Float life ★★★ ★★★★ ★★★ ★★

Page 17: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Batteries comparison-2 Lead-carbon battery series

Items Lead-carbon Lithium-ion Remarks

Lifespan 5000 cycles @50% DOD

6000 cycles @60% DOD

Battery recovery 30% 0 No good recovery for Li battery

System safety ★★★★ ★★

The electrolyte of lead-carbon

is inorganic, much more stable,

up to 2000AH, less quantity

Investment cost (WH) ★★★★ ★★ Half initial cost for lead-carbon

BMS cost 5% 20% High stability for lead carbon,

with less quantity of batteries

Efficiency 90% 95%

Temperature range -40oC ~ +50oC +15oC ~ +30oC No low temp. for Li battery

Page 18: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Research project of ALABC Lead-carbon battery series

> Advanced Lead-Acid Battery Consortium (ALABC) is an authoritative organization of lead batteries

> Narada is the first and the only Chinese enterprise who was sponsored by R&D Program of ALABC

> The vice president of ALABC Boris Monahov has highly praised Narada for its advanced technology

Cooperation with specialists of ALABC Project launching of lead-carbon battery

Page 19: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Research project of ALABC Lead-carbon battery series

Contract signature for the Research Agreement

Page 20: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Authorization for membership by ALABC

Research project of ALABC Lead-carbon battery series

Page 21: Narada lead carbon battery

The background of REXC

Page 22: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Main advantages of lead-acid Why lead-carbon battery?

Market share of various batteries

Lead

Li-ion

Zn-MnO2

Alkaline

NiMH

Li primary

Ni-Cd

68%

13%

6.5%

6.1%

3.7% Main advantages

Mature technology more than 100 years

Best group property, easy for operation

The highest recycling rate up to 95%

Low cost and high cost performance

More safety and operational reliability

Wide temperature range for operation

Large monomer capacity to 10000AH

Page 23: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Market forecast of battery Why lead-carbon battery?

According to the forecast, we can find that the technology of lead will dominate market share

**Source: John Craig, BCI, State of the Industry, 124 BCI Convention, Phoenix, AZ (USA), 2012

Market share of batteries for energy storage

Mark

et

perc

en

tag

e (

%)

Lead Lithium Nickel

Page 24: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Lead carbon = Game changer Why lead-carbon battery?

Lead-Carbon: A Game Changer for Alternative

The current status

The Obama Administration has recently funded scientific

projects for research and development of lead carbon

Applicant Fund Project

Exide Technology with Axion Power 34.3M$

Advanced lead acid battery manufacturing based on lead

carbon technology, meeting the demand for micro & mild HEV

East Penn Manufacturing Co. 32.5M$

Ultra battery manufacturing (combination of lead acid and super capacitor) meeting the demand for micro& mild HEV

Page 25: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

New dimension required Why lead-carbon battery?

In emerging markets, lead-acid batteries need to run in PSOC cycling duty (20% to 80% SOC)

in order to ensure affluent power output and good charge acceptance under these scenarios

100%

80%

20%

0%

1881 1960 1980 Today

Sta

te o

f ch

arg

e

Start Battery

$1.5 Billion

Motive Battery

$3.5 Billion

Standby Battery

$6 Billion

PSOC Battery

New market

Market demand of charging with various duties

Page 26: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Methods of evaluation Why lead-carbon battery?

Time (minute)

C R

ate

DO

D

Fast utility cycling

Time (hour)

C R

ate

DO

D

Slow energy cycling Cycle life test under PSOC status for utility scale (10% DOD)

VRLA life cycle data (S. Drouihet, B.L. Johnson,1997 NREL)

Depth Of Discharge

Cycl

es

to f

ail

ure

Energy: Low rate

Deep cycling

Utility: High rate

Shallow cycling

Page 27: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Advantage in Utility model Why lead-carbon battery?

The test result of frequency smoothing simulation on various batteries by Sandia National Laboratories

Cycle life test under PSOC status for utility scale (10% DOD)

Pro

po

rtio

n o

f in

itia

l ca

paci

ty (

%)

Cycles

Wind battery

VRLA battery C&D CPV

Lithium-ion

Lead-carbon

8 times longer!

Time (minute)

C R

ate

DO

D

Utility Model

Page 28: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Advantage in Energy model Why lead-carbon battery?

Time (hour)

C R

ate

DO

D

Energy Model

The test result of peak-shaving simulation on various batteries by Sandia National Laboratories

Cycle life test under PSOC status for PV hybrid (70% DOD)

Pro

po

rtio

n o

f in

itia

l ca

paci

ty (

%)

Cycles

12 times longer!

80% of initial capacity

Furukawa Lead-carbon

East Penn Lead-carbon

VRLA battery

Page 29: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Among other lead technologies Why lead-carbon battery?

New batteries Main features

Bipolar lead-acid Lead consumption reduced 50%, high capacity

Bipolar ear spiral Ultra high rate discharge, high energy density

Ceramic membrane Long cyclic life and high efficiency of charging

Foamy graphite To replace lead grid with less lead consumption

Lead-carbon Prolonged lifespan, fast charging, no sulfate

Specific energy Specific power Cyclic lifespan

Lead carbon Other types Lead carbon Other types Lead carbon Other types

Page 30: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Milestone of lead-carbon Why lead-carbon battery?

Dr. Lam Lan found

that sulfation risk

can be reduced

under HRPSoC

status if carbon

added into the

negative plate

Year 1997 Australian Csiro

has developed out

an ultra-battery

with capacitor and

negative plate

connected in

parallel inside

Year 2000

East penn became

the authorized

manufacturer of

many projects

sponsored by

ALABC for lead-

carbon battery

Year 2006

The utility storage

project of 3.6MWh

from East Penn

has been accepted

by the PJM grid

Year 2012

The R&D program

of lead-carbon

from Exide, Axion,

East penn….has

been financed by

Obama office for

20 million dollars

Year 2009

Page 31: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Electrical diagram of 3MW storage system

For frequency regulation Why lead-carbon battery?

13.8 KV

Grid

900KW

Inverter

4 strings lead-

carbon battery

3.6MWh storage system for 3MW of

frequency regulation installed by EPM

BESS

Master

Controller

Page 32: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

System development model for energy storage

24 hour period

Batt

ery

sta

te o

f ch

arg

e

Application of lead-carbon Why lead-carbon battery?

Discharging to provide power

reservation or sales of peak price

Charging acceptance during

contingent transmission

Battery in standby operation

with certain residual capacity

For transmission

For power reservation

Page 33: Narada lead carbon battery

Core Technologies

Page 34: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

The principle of lead-carbon Lead-carbon technology

The lead-carbon battery is a perfect combination, which contains advantages of high energy capacity and density

from lead-acid battery, as well as high power rate, fast charging and long cyclic lifespan from ultra capacitor

Conventional Lead-acid Internal mixed Lead-carbon Lead and carbon in parallel

Pb

+

C

PbO2 PbO2 PbO2

C

Pb

Pb

Page 35: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

The principle of lead-carbon Lead-carbon technology

Discharge >

Charge >

Pb + HSO4- - 2e

- Pb

2+ + SO4

2- + H

+

PbSO4 precipitation

Dissolution

PbSO4 Pb2+

+ SO42-

+ 2e- + H

+

Dissolution

Pb + HSO4

- precipitation

Pb2+

PbSO4

PbSO4

Pb Pb Pb

Pb

EAC

Pb2+

Pb2+

Pb2+

Pb2+

Pb2+

Lead-acid battery Lead-carbon battery Pb

+

C

Pb PbO2 PbO2

Lead sulfate irreversibly accumulated on surface of the

negative plate into a layer, which is dense and coarse

The sulfation can be successfully restrained, as a result,

the charging acceptance and lifespan can be improved

Page 36: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Four sorts of lead-carbon Lead-carbon technology

Full carbon in negative

- Long cycle life, high specific power

- Low efficiency of charge & discharge

- Axion Power

Partial carbon in negative

- Excellent long cycle life

- Complicated manufacture

- CSIRO, Furukawa, East Penn

3D carbon in negative

Quite high specific energy & power -

3D structure makes cost quite high -

Firefly Energy, CEA-INES -

Special carbon in negative

Extraordinary HRPSoC cyclic lifespan -

Much easier for industrialization -

Narada authorized by ALABC -

Page 37: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Failures of lead-acid battery Lead-carbon technology

Pb

Grid

PbSO4

HSO4- HSO4

- HSO4

-

2e-

2e-

H2 H2

H2 H2

Low rate discharge High rate discharge Recharge

Corrosion of positive grid

Cap

aci

ty (

%)

Cycles

Inactivation

of interface

Substance

abscission

Failure of

negatives

Ideal status

Page 38: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Main functions

More additional locations of nucleation

Intercalation of hydrogen into graphite

Influence of Electro-osmotic pumping

Restriction upon growth of crystalloid

Evolution of hydrogen over impurities

Conductivity & capacitive contribution

Oxidation reaction on carbon surface

The mechanism of carbon Lead-carbon technology

HR

PS

oC

cycl

es

(tim

es)

Particle size (μm)

Act

ive c

arb

on

Carbon

Carbon

Carbon

Carbon

Page 39: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

The mechanism of carbon Lead-carbon technology

--- Provide enough HSO4- and H

+

as a storage container of acid

Acid storage

--- Improve chemical crystallization

Pb2+

PbSO4 during discharging

--- Improve chemical dissolution

PbSO4 Pb2+

during charging

Pb

PbSO4

Grid

Carbon

Conventional battery plate

Battery plate with active carbon

High rate discharge

High rate Charge

High rate discharge

High rate Charge

Page 40: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

The mechanism of carbon Lead-carbon technology

--- Set up 3D structural network, to

provide active positions for PbSO4

Structure builder

--- Inside of conventional electrode,

there are too many spongy lead

--- Inside of lead-carbon electrode,

there are only big & bulky PbSO4

Comparison on surface

Comparison internally

Lead-carbon Conventional

Lead-carbon Conventional

Page 41: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

The phase transition from PbSO4 to Pb --- “R”and adsorptions and desorptions of electric charges ---“C”

The negative plate of lead-carbon battery is just like innumerable R-C micro-circuitry in parallel connection

Initial period of charging Final period of charging Stable period of charging

The mechanism of carbon Lead-carbon technology

Buffer as a capacitor

Page 42: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Well-chosen components Lead-carbon technology

AGM separator and active carbon

Patented alloy of grid Innovative safety valve

Pre-disperse and formation

Page 43: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Well-chosen components Lead-carbon technology

Unique carbon formulation in active

substance of negative, which could

restrain sulfate and improve cyclic life

efficiently under partial SOC status

Special carbon material

Made from ultrafine glass fiber with

high strength, which has excellent

ability in absorbability as well as

maintenance of electrolyte material

Special AGM separator

Page 44: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Well-chosen components Lead-carbon technology

The carbon materials are evenly

dispersed in aqueous solution with

high speed, that successfully makes

lead and carbon particles mixed

Special pre-disperse tech.

After so many experiments, Narada

found out an exclusive procedure of

formation, that can enhance both the

capacity and cyclic life of batteries

Special formation process

Page 45: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Special carbon formulation Lead-carbon technology

Narada has researched on many materials, such as active carbon, carbon fiber, carbon nanotube, graphene….etc.

Page 46: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Special carbon formulation Lead-carbon technology

Distribution of pore size Distribution of particle size

Size of particle (μm) Pore size (nm)

Vo

lum

e (

%)

Po

re v

olu

me.

dV

/dD

(cm

3g

-1n

m-1

) 1# 1532m2/g

2# 2435m2/g

Page 47: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Special carbon formulation Lead-carbon technology

Capacitive features Hydrogen evolution

Cu

rren

t (m

A)

Potential (V v.s Hg/Hg2SO4) Potential (V v.s Hg/Hg2SO4)

Cu

rren

t (m

A)

Page 48: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Three influence factors of carbon on hydrogen evolution: 1. sort; 2. impurity content; 3. specific surface,

The sort as well as quantity of carbons affect the evolution greatly: the more carbon, the lower over potential

Vo

ltag

e (

V)

Special carbon formulation Lead-carbon technology

Hydrogen evolution affected by different sorts of carbon formulation

AC1 AC2 AC3 Graphite CB

Page 49: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Special carbon formulation Lead-carbon technology C

urr

en

t (A

)

Potential (V)

Carbon V.S. over potential

Narada carbon

Others carbon

Regular negative

Lead Carbon Fiber

Optimum additive content of carbons

Inhibitors for less hydrogen evolution

Special fibers with better conductivity

Page 50: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Special carbon formulation Lead-carbon technology

Narada has developed 50 kinds of carbon formulation together with National institute of chemical defense

Narada carbon with special formulation in HRPSoC performance

Dis

charg

e v

olt

ag

e (

V)

Cycles

6 times longer!

Page 51: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Cyclic performance REXC battery performance

The cyclic performance of 2V200Ah REXC battery between 30% SoC and 80% SoC in peak shaving application

Discharge capacity curves under PSOC status (30%~80%)

Dis

charg

e c

ap

aci

ty (

%)

Cycles

Narada REXC

Conventional

Page 52: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Cyclic performance REXC battery performance

The cyclic performance of 2V500Ah REXC battery between 80% SoC and 40% SoC in peak shaving application

Discharge capacity curves under PSOC status (80%~40%)

Dis

charg

e c

ap

aci

ty (

%)

Cycles

Narada REXC

Conventional

Page 53: Narada lead carbon battery

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High efficiency of conversion REXC battery performance

According to the test result from third party CNAS national lab: Report Number 20121115

which shows that the conversion efficiency of lead carbon (at 80%SOC) can be above 90%

The efficiency comparison of energy conversion under 80% SOC

Eff

icie

ncy

of

en

erg

y c

on

vers

ion

(%

)

Test group

Lead-carbon Conventional Tubular gel

Page 54: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

High rate performance REXC battery performance

Lead-carbon Conventional Tubular gel

Residual capacity curves under PSOC status (80%~40%)

Cycles

Resi

du

al

cap

aci

ty (

%)

According to the test result from third party CNAS national lab: Report Number 20130428,

the PSOC cyclic life of lead-carbon is 5times of tubular gel and 10times of conventional one

Page 55: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Cyclic performance REXC battery performance

Frequency regulation with profile b-5-cell 400Ah according to IEC 61427-2 Clause 6.2 endurance test

Cyclic life test of IEC 61427-2: 6.2 (Frequency Regulation)

Dis

charg

e v

olt

ag

e o

f 5

cell

s in

seri

es

(V)

Cycles

Maximum charging voltage <2.4Vpc

Minimum discharging voltage >1.8Vpc

Page 56: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Cyclic performance REXC battery performance

According to INTERTEK test: SH10100844-001 Test Report as well as the IEC61427 solar standard,

Narada lead-carbon can endure more than 16 group tests, which is 5 times of international standard

Residual Capacity of REXC-600 at 80% DOD and C10 condition

Resi

du

al

cap

aci

ty (

Ah

)

Cycles*150

80%DOD and C10

Page 57: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

The Duration test of discharge for Narada REXC-1000 battery in South Africa: routine test of C10

capacity after every 120 cycles, with constant discharging of 100A current till to 2V (end voltage)

The cycle life of lead-carbon battery under 80% DOD

Du

rati

on

of

dis

charg

e (

Min

)

Cycles

Discharging: 100A to 2V

Charging1: 90A to 2.35Vpc

Charging2: 2.35Vpc until 5A

Charging3: 2.35Vpc for 10min

Cyclic performance REXC battery performance

Page 58: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

According to the test result from third party CNAS national lab: Report Number 20111010

which shows that 105% residual capacity remains after 580 group cycles (3500 sub cycles)

Dis

charg

ing

tim

e (

Min

)

Cycles*60

Cyclic performance REXC battery performance

The cycle life of lead-carbon battery under 30% DOD

The end of life with 60% rated capacity as clients request

The end of life with 60% rated capacity as standard

Page 59: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Cyclic life of lead carbon battery under different DOD

Cycl

e l

ife (

tim

es)

Depth of discharge (DOD)

Cyclic performance REXC battery performance

Page 60: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Cyclic performance for HEV REXC battery performance

Narada start-stop battery >

Comparison of cyclic performance for HEV application

Lead-carbon Conventional

Ni-NiMH cell

Cycles

En

d o

f d

isch

arg

e v

olt

ag

e (

V)

4 times longer!

Page 61: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Cyclic performance for HEV REXC battery performance

The cycle life of lead-carbon battery for HEV can reach 250,000 times, far more than 30,000 as standard

Cyclic performance for start-stop batteries (SBA-S0101)

Th

e v

olt

ag

e o

f d

isch

arg

e (

V)

Cycles

Lead-carbon

Conventional A

Conventional B

Page 62: Narada lead carbon battery

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High rate performance REXC battery performance

At stimulation of power smoothing, the lifespan reach nearly 180,000 cycles, equivalent to 12 years operation

Cyclic performance under high rate PSOC status

Fin

al

vo

ltag

e o

f d

isch

arg

e (

V)

Cycles

• Discharge at 2C for 15s

• Charge at 2C for 15s

End of discharge voltage 10.3V

Page 63: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

High rate performance REXC battery performance

Mitigated polarization in charge and discharge of lead carbon battery enables the

delivering of enhanced high rate performance as well as high current characteristics

The cell voltage curves during High Rate PSoC cycling

Vo

ltag

e (

V)

Time (s)

Narada REXC

Conventional

600mV

100mV

Page 64: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

High rate performance REXC battery performance

According to the test result from third party INTERTEK: SH12070808-001 Test Result

which shows that the lead-carbon batteries from Narada can be discharged at 10C rate

The discharge performance test under high current

Vo

ltag

e (

V)

Time (s)

10C (750A)

8C (600A)

6C (450A)

Page 65: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

At 50% SOC with a constant voltage of 2.4V at 0˚C, the test result shows the charge acceptance of

Narada lead-carbon battery reaches 2.8, which is higher than target value 2.0 as a standards of BESS

The comparison of charging acceptance performance

Ch

arg

ing

Acc

ep

tan

ce

Test cells

Charging performance REXC battery performance

Lead-carbon Conventional

Page 66: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

According to the test result from third party INTERTEK: SH10100844-001 Test Report, which shows

that the lead-carbon battery of Narada can be 95% charged within 1hour and fully charged in 2hour

Charging performance REXC battery performance

Fast recharging after 100% depth of discharging

Ch

arg

ing

cu

rren

t (A

)

Time (h)

Efficie

ncy

of ch

arg

ing

acce

pta

nce

(%)

Charging capacity

Charging current

Page 67: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

The carbon helps to enlarge the porosity at negative, so as to improve transmission and diffusion of sulfuric acid

inside lead paste. As a result, the HRPSoC performance can be highly improved with higher charging acceptance

Conductance performance REXC battery performance

Carbon Conductivity

AC1 0.33S cm

AC2 0.34S cm

AG 41.16S cm

The conductance of lead-carbon battery

Co

nd

uct

an

ce (

s)

Control AC1 AC2 AG

• The improvement of carbon conductance will enhance battery performance

Page 68: Narada lead carbon battery

REXC storage system

Page 69: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Narada Energy Storage System

Brief introduction

Narda ESS is a smart management system of

energy, ideally for micro-grid solutions, in order

to smooth power, track grid load and shave peak

Page 70: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Application of Narada ESS Narada ESS introduction

Solar power

Wind power

Traditional Transmission

Auxiliaries

Commercial

Industrial

Residential

Energy consumption Energy production

Energy delivery

Page 71: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Main 4 sorts of scenarios Narada ESS introduction

Narada ESS system Grid modulation

Island Off-grid

Giant On-grid

Urban Micro-grid

Page 72: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Narada ESS introduction The diagram of energy system

Batteries PCS

DC combiner

DC

DC

AC

PV array

DC combiner

Inverter

DC

DC

AC

DC

DC

Wind

Diesel

Loads

AC

AC

AC

Transformer

400V 400V 10KV

Page 73: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

• Cells → Modules → String

• Power & Capacity configurable

• To store and release energy

1. Battery pack group

• AC to DC conversion (charge)

• DC to AC conversion (discharge)

2. Power Convert System

• Smart ventilation system

3. Accessories

Structural sections Narada ESS introduction

Page 74: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

24

38

mm

12192mm

REXC-600 batteries

A

C

A

C

A

C

A

C

Thermal management

door Lights Lights

BMS

BMS

Sensor Nozzle

Structural sections Narada ESS introduction

Vertical view of lead-carbon batteries with racks in 40feet container

door door

Thermal management

Page 75: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Highlights of Narada ESS

BMS

Special BMS control

Smart thermal management

Intelligent SCADA system

Active balance technology

Page 76: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

1. Active balance technology Highlights of Narada ESS

Battery of

big capacity

Battery of

Small capacity

In a battery pack, the one with small capacity will easily get over charge

and over discharge, so the service life of whole pack shall be influenced

Active balance technology

With such technology, the energy could be

transferred and balanced between each battery

in the pack at any time without any energy loss

Page 77: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Unify battery performance by active balance technology at ay time

> Charging balance > Discharging balance

Longer battery life Easier maintenance Better protection

1. Active balance technology Highlights of Narada ESS

Page 78: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

2. Special BMS control Highlights of Narada ESS

SCADA

BMS

Narada PCS controller

• Highly precise current temperature

• High efficient balance controlling

• Highly precise voltage inspection

• Active balance for heavy current

• Multiple protection for safety

• Practical evaluation of SoC

• Records of historical events

• Better user experience

• Smart BMS interface

• High reliability

Main characters of Narada BMS

Page 79: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

2. Special BMS control Highlights of Narada ESS

Build up a mathematic model for storage system by software, then analyze and calculate to optimize

structural parameter, save response time, prevent influence from harmonics, and to improve power quality

Controlling schematism

PV array

Grid

Controller

Batteries

Charging unit

BMS

Inverter

By pass

Central control

Load

Host PC

Power line

Communication

Page 80: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

3. Thermal management Highlights of Narada ESS

Optimize the operational temperature by the unique ventilation system

Enhance energy availability Unify the performance of each battery

Page 81: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

3. Thermal management Highlights of Narada ESS

Ventilation system

Air condition and inlet

Page 82: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

4. Monitoring platform Highlights of Narada ESS

Real-time monitoring and remote control on the energy storage system

Friendly interface Distributed datalog Multiple protocol Flexible setup

Monitoring system

Ethernet MODBUS TCP/IP

Ethernet IEC104/TEC6158C

Battery units

CAN bus

PCS

Unit detection

Local database

Page 83: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

4. Monitoring platform Highlights of Narada ESS

Interface of Narada SCADA

Page 84: Narada lead carbon battery

Residential projects

Page 85: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

• PV generation: 5KWp

• Storage capacity: 24KWh

• Battery type: REXC-500

• Battery quantity: 24pcs

• Project date: 2015.10

Project Details

Residential solution of Narada HESS Perth city, Australia

Page 86: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

• PV generation: 5KWp

• Storage capacity: 12KWh

• Battery type: 12REXC-500

• Battery quantity: 12pcs

• Project date: 2013.08

Project Details

Residential solution of Narada HESS Mount Toolebewong, Australia

Page 87: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

• PV generation: 100KWp

• Storage capacity: 96KWh

• Battery type: REXC-500

• Battery quantity: 96pcs

• Project date: 2014.07

Project Details

Commercial solution of Narada HESS Copenhagen, Denmark

Page 88: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

• PV generation: 3.7KWp

• Storage capacity: 9.6KWh

• Battery type: 6REXC-300

• Battery quantity: 8pcs

• Project date: 2016.03

Project Details

Residential solution of Narada HESS Dover, Great Britain

Page 89: Narada lead carbon battery

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Residential solution of Narada HESS Dover, Great Britain

Page 90: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

• PV generation: 3KWp

• Storage capacity: 7.2KWh

• Battery type: 6REXC-300

• Battery quantity: 8pcs

• Project date: 2013.10

Project Details

Residential solution of Narada HESS Melbourne, Australia

Page 91: Narada lead carbon battery

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Residential solution of Narada HESS Melbourne, Australia

Page 92: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

• PV generation: 6KWp

• Storage capacity: 76.8KWh

• Battery type: 12REXC-200

• Battery quantity: 8pcs

• Project date: 2015.07

Project Details

Residential solution of Narada HESS Hangzhou city, Zhejiang, China

Page 93: Narada lead carbon battery

Stored Energy Solutions for a Demanding World! More references

Residential solution of Narada HESS Hangzhou city, Zhejiang, China

Page 94: Narada lead carbon battery

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Residential solution of Narada HESS Hangzhou city, Zhejiang, China

Page 95: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

• PV generation: 6.24KWp

• Storage capacity: 14.4KWh

• Battery type: 6REXC-300

• Battery quantity: 16pcs

• Project date: 2015.04

Project Details

Residential solution of Narada HESS Eaglemont, Australia

Page 96: Narada lead carbon battery

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Residential solution of Narada HESS Eaglemont, Australia

Page 97: Narada lead carbon battery

Large-scale projects

Page 98: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Xuzhou city, Jiangsu province, China

Industrial storage for GCL-silicon

Project highlights

The first commercialized storage project for enterprises,

which shows economical efficiency of narada batteries

• Storage power: 1.5MWp

• Storage capacity: 12MWp

• Battery type: REXC-1000

• Battery quantity: 6300pcs

• Project date: 2016.09

Page 99: Narada lead carbon battery

Stored Energy Solutions for a Demanding World! More references

Xuzhou city, Jiangsu province, China

Industrial storage for GCL-silicon

Page 100: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Zhenjiang city, Jiangsu province, China

Industrial storage for Acetech

Project highlights

The 2nd commercialized storage project for enterprises,

also shows economical efficiency of narada batteries

• Storage power: 750KWp

• Storage capacity: 8MWp

• Battery type: REXC-1000

• Battery quantity: 4032pcs

• Project date: 2016.12

Page 101: Narada lead carbon battery

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Katwaria Sarai, New Delhi, India

Energy storage project for Grid India

Page 102: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Xuzhou city, Jiangsu province, China

Industrial storage for GCL-silicon

Project highlights

The first oversea project of energy storage, which consists

of both Narada lead-carbon battery and lithium battery

• Storage capacity: 1MWh

• Pb-C batteries: 500KWh

• Li-ion batteries: 500KWh

• Function: Frequency modulation

• Project date: 2016.08

Page 103: Narada lead carbon battery

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Katwaria Sarai, New Delhi, India

Energy storage project for Grid India

Page 104: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Changping district, Beijing, China

CNR micro-grid demonstration

Project highlights

Two operational modes: On-grid and islanding power to

shift peak load and realize the central energy management

• PV generation: 275KWp

• Storage capacity: 1MWh

• Battery type: REXC-400

• Battery quantity: 350pcs

• Project date: 2013.10

Page 105: Narada lead carbon battery

Stored Energy Solutions for a Demanding World! More references

Changping district, Beijing, China

CNR micro-grid demonstration

Page 106: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Olympic park, Beijing, China

Hanergy FE power station

Project highlights

It generates 70KWh power per day to satisfy electricity demand

for 400 people, that can be installed in half hour by 4 persons

• PV generation: 19.2KWp

• Storage capacity: 144KWh

• Battery type: REXC-1000

• Battery quantity: 72pcs

• Project date: 2014.09

Page 107: Narada lead carbon battery

Stored Energy Solutions for a Demanding World! More references

Olympic park, Beijing, China

Hanergy FE power station

Page 108: Narada lead carbon battery

Stored Energy Solutions for a Demanding World!

Dong Fushan island, Zhejiang province, China

Guodian PV-wind-diesel & storage

Project highlights

The second largest micro-grid system by 2010, also

equipped with desalinization plants of sea water

• PV generation: 100KWp

• Wind generation: 210KWp

• Battery type: REXC-1000

• Storage capacity: 560KWh

• Project date: 2010.11

Page 109: Narada lead carbon battery

Stored Energy Solutions for a Demanding World! More references

Dong Fushan island, Zhejiang province, China

Guodian PV-wind-diesel & storage

Page 110: Narada lead carbon battery

Thanks!