碳纤维复合材料电池箱强制风冷散热分析

Analysis of Forced Air Cooling and Heat Dissipation in Carbon Fiber Composite Battery Boxes

由于碳纤维电池箱散热性能较差的问题,针对电池箱内部的散热系统进行设计,包括电池模组布置以及箱体内风扇的排布方式。构建电池箱和电池模组模型并导入COMSOL,对磷酸铁锂电池建立电热耦合模型。通过五种不同的风扇排布方式,使密闭电池箱内部形成不同的空气内循环。仿真结果表明,双风扇-X方向吹风的风扇排布方式对电池模组散热有最优效果,电池模组最高温度为40.5℃,与无风扇情况对比,最高温度降低了9.4℃。对密闭碳纤维电池箱的散热系统设计具有参考意义。

Due to the poor heat dissipation performance of carbon fiber battery boxes,a design was carried out for the internal heat dissipation system of the battery box,including the arrangement of battery modules and the arrangement of fans inside the box.Build battery box and battery module models and import them into COMSOL to establish an electric thermal coupling model for lithium iron phosphate batteries.By using five different fan arrangements,different air circulation is formed inside the sealed battery box.The simulation results show that the fan layout with dual fans blowing in the-X direction has the best effect on the heat dissipation of the battery module.The maximum temperature of the battery module is 40.5℃,and compared with the situation without a fan,the maximum temperature is reduced by 9.4℃.The design of the heat dissipation system for sealed carbon fiber battery boxes has reference significance.