电池模组复合液冷散热的实验研究与数值分析

针对一种新型复合液冷散热的圆柱电池模组进行了实验与数值研究。电池模组内106颗圆柱电池正交排列,电池的底部通过电绝缘板与液冷板连接,中上部通过热扩散板以及导热柱与底部的液冷板相连。在单体电池3C放电、液冷流量为10 L/min时,实验测得电池模组的最高温度约为41.99℃,而相同条件下的数值仿真结果则为41.86℃,表明仿真模型合理可行。但是电池模组的温差约为5.68℃,超出电池热管理所要求的极限温度范围。对包括导热柱直径、导热柱高度以及热扩散板厚度在内不同结构参数进行了优化。优化后的电池模组的温差降为3.96℃,与传统单纯底部液冷结构相比,降低了约22.35%。

Experimental and Numerical Study of a Liquid-Cooled Battery Module

Experimental study and numerical investigations of a liquid-cooled cylindrical battery module are presented.In the battery module,106 cylindrical batteries are arranged in square array on the cold plate allowing axially downward heat dissipation,whereas the upper parts are connected with a common heat spreader plate and adjacent thermal columns,to conduct heat to the cold plate in the radial direction.The maximum temperature of the battery module monitored in the experimental test is about 41.99℃when the discharging rate is 3C and the flow rate is 10 L/min.While the temperature obtained by the numerical simulation under the same boundary conditions is about 41.86℃,which authenticates the present simulation model.Then,the structure optimization is conducted since the temperature difference of the battery module(baseline)is about 5.68℃.The studied structural parameters include the diameter and height of the thermal column,and the thickness of the heat spreader plate.Finally,the temperature difference of the battery module is about 3.96℃after optimization,which is 22.35%lower than the conventional bottom liquid cooling battery module.