基于微通道扁管复合冷却电池热管理仿真分析

Simulation analysis of battery thermal management based on microchannel flat tube composite cooling

为解决锂离子电池在高温环境下寿命衰减的问题,设计了一种基于微通道扁管的电池热管理系统,并对其冷却能力进行了理论分析和数值模拟。微通道扁管冷却型电池模块在最大连续放电倍率下的最高温度为32.22℃,最大温差7.05℃。为降低电池模块温度的不均匀性,进一步开发了结合相变材料和热解石墨片的两种复合冷却热管理系统。改善后的复合冷却模型可将电池的最高温度控制在26.16℃,最大温差控制在0.95℃。

In order to solve the problem of lithium-ion battery life decay in high temperature environment,a battery thermal management system based on microchannel flat tube was designed,and its cooling capacity was analyzed theoretically and numerically.The maximum temperature of microchannel flat tube cooling battery module was 32.22℃and the maximum temperature difference was 7.05℃under maximum continuous discharging rate.In order to reduce the non-uniformity of the battery module temperature,two kinds of composite cooling heat management systems were developed,which combined phase change materials and pyrolytic graphite sheet.The improved composite cooling model could control the maximum temperature of the battery at 26.16℃and the maximum temperature difference at 0.95℃.