(中南大学 冶金与环境学院，长沙 410083)
摘 要: 基于COMSOL MULTIPHYSICS 平台建立三维热仿真模型，定量分析不同工作电流条件下的温度分布。结果表明：单体及模块最高温度集中在中心区域，温度呈辐射状由内向外逐渐降低。在换热系数20 W/(m2·K)作用下，低于8C倍率放电可使单体电池工作在正常温度范围，而使三并五串电池模块最高温度在正常范围，放电电流应低于5C；在5C倍率下放电结束后，荷电状态(SOC)为0模块中心电池最高温度达到322.88 K，比同倍率绝热条件下单体最高温度仅低2.81 K。
关键字: 锂离子电池；热模型；温度分布；仿真
（School of Metallurgy and Environment, Central South University, Changsha 410083, China）
Abstract:A three-dimensional thermal simulation model was established based on the finite element commercial software COMSOL MULTIPHYSICS to analyze the influence of different discharge rates on temperature distribution. The results show that the highest temperature locates at the central area, and the temperature decreases from inside to outside. Besides, the single cell can work well below 8C discharge current when the coefficient of heat transfer is set to 20 W/(m2·K), but 5C for the module. The highest temperature of the central cell of the module under 5C is 322.88 K, only 2.81 K lower than that of single lithium-ion battery working at adiabatic condition nearly.
Key words: lithium-ion battery; thermal model; temperature distribution; simulation
