Thermal Management of Lithium-ion Batteries for Electric Vehicles through Immersion Cooling

Direct contact liquid immersion cooling is receiving increased attention as a potential battery thermal management method. This method offers greater cell thermal homogenization and increased pack performance through enhanced rates of heat transfer. However, limited published literature exists on this thermal management method, particularly on module arrangements. This study presents an experimental investigation of a battery module consisting of four LiFePO
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cylindrical cells connected electrically in parallel and completely immersed in the dielectric fluid Novec 7000. The module is subjected to increasing constant current discharge rates to a maximum of 3C, examining the thermal performance of the proposed method and its capability to minimize cell-to-cell temperature difference, particularly under two-phase conditions.