EV Battery Cooling System

This demo shows an Electric Vehicle (EV) battery cooling system. The battery packs are located on top of a cold plate which consists of cooling channels to direct the cooling liquid flow below the battery packs. The heat absorbed by the cooling liquid is transported to the Heating-Cooling Unit. The Heating-Cooling Unit consists of three branches to switch operating modes to cool and heat the battery. The Heater represents an electrical heater for fast heating of the batteries under low temperature conditions. The Radiator uses air-cooling and/or heating when the batteries are operated stably. The Refrigerant system is used for cooling the overheated batteries. The refrigeration cycle is represented by the amount of heat flow extracted from the cooling liquid. The system is simulated under either FTP-75 drive cycle or fast charge scenarios with different environment temperatures.

Model

Battery Subsystem

Cold Plate Subsystem

Cooling Plate (Pack 1) Subsystem

Heating-Cooling Unit Subsystem

Refrigerant Subsystem

Radiator Subsystem

Heater Subsystem

Pump Controller

Air Stream

Environment

Simulation Results from Scopes

Simulation Results from Simscape Logging

This figure shows the performance of series of four lithium-ion battery packs. The data used for each cell is based on T. Huria, M. Ceraolo, J. Gazzarri,R. Jackey. "High Fidelity Electrical Model with Thermal Dependence for Characterization and Simulation of High Power Lithium Battery Cells," IEEE International Electric Vehicle Conference, March 2012.

This figure shows the total heat flow rate generated by batteries, the total heat flow into to the coolant and the total heat flow extracted from the coolant, and the contribution of each cooling system.

This figure shows the mechanical energy input for the cooling system.