Abstract: The heat dissipation of lithium-ion battery pack has been an important factor affecting the power performance and safety of electro mobile. In this paper, a one-dimensional simulation model of liquid cooling system of lithium-ion battery pack was built based on AMESim software, in order to explore the effect of different cooling pipeline designs on the heat dissipation of lithium-ion battery pack. By comparing and analyzing the cooling effect of four different cooling structures, it is found that the maximum temperature and temperature difference of 4th structure are the lowest and the cooling effect is the best. The results show that the position of inlet and outlet of the flow passage, the branching situation of each branch and the contact area of the flow passage and the battery pack have different degrees of influence on the heat dissipation performance of the battery pack. The cooling effect of the battery pack can be significantly improved, the maximum temperature of the battery pack can be reduced, and the temperature uniformity of the battery pack can be improved by reasonable flow passage arrangement. This provides a reference for the structure design of liquid cooling system of lithium-ion battery.

Key words: Battery thermal management; Liquid cooling; AMESim; Thermal analysis

摘要： 锂离子电池组的散热问题是影响电动汽车动力性和安全性的重要因素。论文基于 AMESim 软件搭建了锂离子电池模组液冷散热系统的一维仿真模型，探究了不同冷却流道设 计对锂离子电池组散热效果的影响。对设计的四种不同冷却结构的散热效果进行对比分析， 发现方案四的最高温度及温差最低，冷却效果最佳。结果表明，流道进出口位置、各支路分 流情况及流道与电池组的接触面积等因素均对电池组的散热性能产生不同程度的影响，通过 合理的流道排布可以显著改善电池组的冷却效果，降低电池组最高温度，提高电池组温度均 匀性，这为锂离子电池液体冷却系统结构设计提供了参考依据。

关键词: 电池热管理；液冷；AMESim；热分析