混合动力客车锂离子电池组散热分析与优化

Heat Dissipation Analysis and Optimization of Li-Ion Battery Pack in Hybrid Bus

针对某客车集团一辆插电式混合动力客车在实车实验时出现的锂离子动力电池组温度过高的问题,在AMESim软件中搭建了该客车锂离子电池组的串联风冷散热模型,得到了锂离子电池组的实时温度变化情况,分析了电池组温度过高的原因,提出优化该客车原有电池组散热结构的必要性;针对原因进行散热结构的优化设计,利用Fluent软件仿真分析锂离子电池组的温度场和速度场,验证优化效果。结果表明所提出的优化方案能够解决本客车出现的散热问题,达到良好的散热效果。

Contrapose the problem of the high temperature of the Li-ion power battery in a vehicle experiment of a plug-in hybrid bus of a passenger car company, the series air-cooled heat dissipation model of Li-ion battery of this bus was built with AMESim software.The temperature change of the Li-ion battery pack was obtained, the reason for the high temperature of the battery pack was analyzed, and the necessity of optimizing the cooling structure of the existing battery pack was proposed. The optimization design of the heat dissipation structure was carried out, and the temperature field and velocity field of the Li-ion battery pack were analyzed by Fluent software to verify the optimization effect.The results show that the proposed optimization solution can solve the problem of heat dissipation of the bus, and achieve a good cooling effect.