We acknowledge the support of the Natural Sciences and Engineering Council of Canada (NSERC), which invests annually over $1 billion in people, discovery and innovation. EECOMOBILITY (ORF) & HEVPD&D CREATE We acknowledge the support of the Ontario Research Fund: Research Excellence Program. Battery Manufacturer: LG Chem Type: Lithium-Ion (LMO) Cell Voltage Max/Min: 4.2/3.0 V Pack Configuration.: 86S 5P Number of Cells: 430 Nominal Cell Voltage: 3.7 V Nominal System Voltage: 318.2 V Rated Pack Capacity: 75 Ah Rated Pack Energy: 23 kWh Weight of Pack: 303 Kg Cooling: Active – Liquid Cooling Pack Location: Two Sections: (1) Behind Rear Seats (2) Under Rear Seats Constrains and Objectives Electro - Thermal Model Main Battery Pack Secondary Battery Pack Battery Pack Design and Thermal Management Centre for Mechatronics and Hybrid Technology (CMHT) Mechanical Engineering McMaster University Raven Chen Thermal Model Electrical Model = − 1 − ̇ 1 = − 1 1 1 1 + 1 1 = + − · = − + − Current Current Temperature Where, the second equation describes the dynamic voltage across the RC circuit parameters & function of SOC and Where, C is heat capacity (J/K) R is heat transfer resistance (K/W) Q is the rate of heat generated (W) • Design and dimension of battery pack based on suitable models • General work procedure to select battery technology and battery design constrains – evaluate suitable battery technologies to specify electric and thermal termination – battery management systems to predict state of charge, health, function – battery thermal management system to operate cooling and heating effectively Battery designed with ribs can increase the heat transfer rate. Explosive View of a VW Pack Battery Parameters • The heat can be a source to warm up the cabin in cold weather conditions. Single cell Conduction between cells Cell provided by NRC Type: Lithium-Silicon Nominal Cell Voltage: 4.0V Nominal Module Voltage: 48 V Module Configuration.: 5 Parallel Strings of 12 Cells in Series Pack Configuration: 7 Modules in Series Number of Cells: 420 Nominal Pack Voltage: 336V Rated Pack Capacity: 75 Ah Rated Pack Energy: 25kWh Weight of Pack: ? Pack Location: In front of the vehicle ? Cooling: Air Cooling • Locate the pack in the front of a vehicle for improving heat transfer. • Air cooling of a battery creates a high potential for energy savings and heat recovery. Battery pack • The operation of most Li-ion cells should be limited to a temperature of 20°C to 40°C. • Temperature differences between cells should maintain below 5°C. ›

Battery Pack Design and Thermal Managementhevpdd.ca/wp-content/uploads/2019/08/EECOMOBILITY... · battery design constrains – evaluate suitable battery technologies to specifyelectric

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Page 1: Battery Pack Design and Thermal Managementhevpdd.ca/wp-content/uploads/2019/08/EECOMOBILITY... · battery design constrains – evaluate suitable battery technologies to specifyelectric

We acknowledge the support of the NaturalSciences and Engineering Council of Canada(NSERC) which invests annually over $1billion in people discovery and innovation

EECOMOBILITY (ORF) ampHEVPDampD CREATE

We acknowledge the support ofthe Ontario Research FundResearch Excellence Program

Battery Manufacturer LG ChemType Lithium-Ion (LMO) Cell Voltage MaxMin 4230 V Pack Configuration 86S 5PNumber of Cells 430Nominal Cell Voltage 37 V Nominal System Voltage 3182 VRated Pack Capacity 75 Ah Rated Pack Energy 23 kWh Weight of Pack 303 KgCooling Active ndash Liquid Cooling Pack Location Two Sections (1) Behind Rear Seats (2) Under Rear Seats

Constrains and Objectives

Electro-Thermal Model

Main Battery Pack

Secondary Battery Pack

Battery Pack Design and Thermal ManagementCentre for Mechatronics and Hybrid Technology(CMHT)Mechanical Engineering McMaster UniversityRaven Chen

Thermal ModelElectrical Model

119881119881119879119879 = 119881119881119874119874119874119874119874119874 minus 1198811198811 minus 119868119868119877119877119904119904

1198811 = minus1

119877119877111986211986211198811198811 +

11198621198621119868119868

119889119889119879119879119888119888119889119889119889119889

=119876119876119862119862119888119888

+119879119879119904119904 minus 119879119879119888119888119877119877119888119888 119862119862119888119888

119889119889119879119879119904119904119889119889119889119889

=119879119879119894119894119894119894 minus 119879119879119904119904

119862119862119888119888119888119888119894119894119888119888119877119877119888119888119888119888119894119894119888119888+119879119879119904119904 minus 119879119879119888119888119862119862119888119888119888119888119894119894119888119888119877119877119888119888

CurrentCurrent

Temperature

Wherethe second equation describes the dynamicvoltage across the RC circuitparameters 119877119877amp119862119862 119886119886119886119886119886119886 function of SOC and 119879119879

WhereC is heat capacity (JK)R is heat transfer resistance (KW)Q is the rate of heat generated (W)

bull Design and dimension of battery pack based on suitable models

bull General work procedure to select battery technology and battery design constrains

ndash evaluate suitable battery technologies to specify electric and thermal termination

ndash battery management systems to predict state of charge health function

ndash battery thermal management system to operate cooling and heating effectively

Battery designed with ribs can increase the heat transfer rate

Explosive View of a VW PackBattery Parameters

bull The heat can be a source to warm up the cabin in cold weather conditions

Single cell Conduction between cells

Cell provided by NRCType Lithium-Silicon Nominal Cell Voltage 40VNominal Module Voltage 48 V Module Configuration 5 Parallel Strings of 12 Cells in SeriesPack Configuration 7 Modules in Series Number of Cells 420Nominal Pack Voltage 336VRated Pack Capacity 75 Ah Rated Pack Energy 25kWhWeight of Pack Pack Location In front of the vehicle Cooling Air Cooling

bull Locate the pack in the front of a vehicle for improving heat transfer bull Air cooling of a battery creates a high potential for energy savings and heat recovery

Battery pack

bull The operation of most Li-ion cells should be limited to a temperature of 20degC to 40degC

bull Temperature differences between cells should maintain below 5degC

rsaquo119881119881119879119879