基于PCM的锂电池模块仿真模拟研究

Simulation of Lithium Battery Module with PCM

本文主要针对电动汽车锂电池热管理进行研究,为了增强电池散热和提高电池模块温度分布均匀性,提出了一种基于相变材料(Phase Change Material,PCM)的热管理方式。利用ANSYS Fluent建立了一个三维数值模型,为了更符合实际锂电池放电,调用了双电势多尺度多维度电池模型(Multi-scale Multi-dimensional Method,MSMD),分别对自然对流和基于相变材料的电池模块在不同放电倍率和不同环境温度下进行了仿真模拟研究,结果表明:基于PCM的电池组在PCM起作用后,在25℃和35℃环境温度下分别使电池组表面最高温度平均降低了14.93℃和16.24℃,最大温差分别平均降低了2.13℃和1.98℃。

This article focuses on the thermal management of lithium batteries for electric vehicles.In order to enhance battery heat dissipation and improve the temperature distribution uniformity of battery modules,an additional phase change material(PCM)thermal management method is proposed.A three-dimensional numerical model was established using ANSYS Fluent.In order to more accurately meet the actual lithium battery discharge,a dual-potential multi-scale multidimensional method(MSMD)was called.The battery module has been simulated and studied at different discharge rates and different ambient temperatures.The results show that after the PCM is added to the battery pack,the maximum surface temperature of the battery pack is reduced by 14.93℃and 16.24℃at 25℃and 35℃ambient temperature,respectively,and the maximum temperature difference is reduced by 2.13℃and 1.98℃,respectively.