电池模组液冷板冲压结构设计及其散热性能研究

Research on stamping structure design and heat dissipation performance of liquid-cooling plate for battery module

为了探究液冷板冲压结构对电池模组散热性能的影响,对液冷板的冲压结构参数进行了分析与设计,采用CFD(计算流体动力学)流固热耦合数值计算方法,对不同液冷板流道结构参数下的散热性能、能耗以及均温性能进行了分析。结果表明:减小中心流道宽度,液冷系统的散热均温性能提升明显;中心流道宽度W5等于7 mm时,平均温度降低了2.5%,而最大温差降低了7.7%。流道深度越小,系统的散热均温性能越好,能耗亦大幅增加;流道深度为2 mm时,平均温度下降了26.9%,最大温差下降了32.7%,流阻升高了3.4倍。添加强化传热结构后,液冷系统的平均温度降低了3.8%、最大温差下降了15.1%;相比整体区域添加强化传热结构,部分区域添加强化传热结构可以减小流阻、降低能耗,而不引起系统的散热均温性能的显著变化。

In order to investigate the effects of stamping structure for liquid-cooling plate on the heat dissipation performance of battery module,the stamping structure parameters of liquid-cooling plate were analyzed and designed,and CFD(Computational Fluid Dynamics)fluid-solid thermal coupled numerical calculation method was used to analyze the heat dissipation performance,energy consumption,and uniform temperature performance under various flow channel structure parameters of liquid-cooling plate.The results show that when the width of central flow channel decreases,the heat dissipation and temperature uniformity performances of the liquid-cooling system are significantly improved.When the width of central flow channel W5 is equal to 7 mm,the average temperature drops by 2.5%and the maximum temperature difference decreases by 7.7%.The smaller the depth of flow channel is,the better the heat dissipation and temperature uniformity performances of liquid-cooling system are,and the energy consumption increases significantly.When the depth of flow channel is 2 mm,the average temperature decreases by 26.9%,the maximum temperature difference decreases by 32.7%,and the flow resistance increases by 3.4 times.The average temperature drops by 3.8%in liquid-cooling system adding the enhanced heat transfer structure,and the maximum temperature difference decreases by 15.1%.Compared with adding an enhanced heat transfer structure in the whole area,adding enhanced heat transfer structure in some area can reduce the flow resistance and energy consumption without causing significant changes in the heat dissipation and temperature uniformity performances of the system.