基于微通道液冷的动力电池热管理性能分析

Thermal Management Performance Analysis of Power Battery Based on Microchannel Liquid Cooling

为了对电池进行有效的热管理,文章提出一种采用微通道液体冷却的热管理方式,并基于COMSOL软件对一款磷酸铁锂软包电池仿真研究,分析了不同放电倍率下冷却剂流量、冷却剂入口温度对电池模组冷却性能的影响。结果表明,采用冷却方式可以将电池组的最大温差及最高温度均控制在允许的区间;增加冷却剂流量可以在一定程度上降低电池组的最高温度和最大温差,但是需要考虑泵送功的损失;降低冷却剂入口温度是降低电池模组最高温度的有效方式,冷却剂入口温度对电池组温度一致性影响很小。

For the battery to effectively thermal management,this paper proposes a thermal management method using microchannel liquid cooling.Based on COMSOL software,a simulation study of a lithium iron phosphate flexible battery was conducted to analyze the influence of coolant flow rate and coolant inlet temperature on the cooling performance of the battery module at different discharge rates.The results show that the maximum temperature difference and maximum temperature of the battery pack can be controlled in the allowed range by cooling method.Increasing coolant flow can reduce the maximum temperature and temperature difference of the battery pack to a certain extent,but the loss of pumping power needs to be considered.Reducing the coolant inlet temperature is an effective way to reduce the maximum temperature of the battery module,and the coolant inlet temperature has little influence on the temperature consistency of the battery pack.