锂离子电池模组液冷散热设计

Lithium-ion battery module liquid cooling heat dissipation design

为了提高电池模组的散热效果,建立了电池模组的液冷散热模型,并且在常用的蛇形流道和并行流道的基础上对流道结构进行改进。利用Fluent软件仿真技术分析对比在不同结构下电池模组的散热效果,选定最佳流道结构。研究分析在不同冷却液进出口位置、流量、初始温度以及流道结构参数下模组的散热性能,结果表明:两侧液冷板的冷却液进口位置分别设计在电池上下端时的液冷散热效果相对较好;增大冷却液流速能够显著改善模组的散热效果;冷却液的初始温度降低能使模组的最高温度变小,但模组的温度均匀性会变差;流道结构参数对模组最大温差有一定程度的影响,对模组最高温度影响较小。

To improve the cooling effect of the battery module,the liquid cooling heat dissipation model of the battery module was established,and the flow channel structure was improved on the basis of the common serpentine channel and parallel channel.Fluent software simulation technology was used to analyze and compare the cooling effect of the battery modules under different structures,and the optimal flow channel structure was selected.The cooling performance of the modules was studied and analyzed under different coolant inlet and outlet positions,flow rates,initial temperatures and flow channel structural parameters.The results show that the liquid cooling effect is relatively good when the coolant inlet positions of the two liquid cooling plates are respectively designed at the upper and lower ends of the battery.The cooling effect of the modules can be significantly improved by increasing the flow rate of the coolant.Lowering the initial coolant temperature can reduce the maximum temperature of the module,but at the same time,the temperature uniformity of the module will become worse.The maximum temperature difference of the module is affected by the structural parameters of the flow passage to a certain extent,but the maximum temperature of the module is less affected.