PA/EG耦合风冷电池热管理系统轻量研究

Study on Light Weight of Battery Thermal Management System with PA/EG Coupled Air Cooling

本文提出了一种将复合相变材料(石蜡(PA)混合膨胀石墨(EG))与空冷相耦合的电池热管理方案(简称APE-BTMS),该系统中电池中部采用PA/EG进行冷却,电池的上下端采用空冷(空气流速为1.23 m/s)。APEBTMS的主要目的是,将电池的工作温度冷却到最佳温度范围的同时,减轻整个电池热管理系统的质量。实验结果表明:APE-BTMS-45模型在相同的条件下展现了最佳的冷却性能;同时,基于COMSOL建立APE-BTMS数值模型,进行更加精细地轴向厚度和不同环境温度下对APE-BTMS冷却性能加以对比,经数值模拟结果进一步验证,APEBTMS-45在对比数据中具有最佳的冷却性能,并可最大轻量216.71 kg。本文的研究结果可为基于相变材料的电池热管理系统的设计开发提供参考和数据支撑。

In this paper,a battery thermal management system based on air cooling coupled with the composite phase change materials cooling(referred to as APE-BTMS)is proposed,in which the composite phase change materials(PA/EG)are obtained by mixing the paraffin wax(PA)and the expanded graphite(EG).In this system,the middle part of the battery is cooled by PA/EG,and the upper and lower ends of the battery are cooled by air with the air velocity of 1.23 m/s.The main purpose of APE-BTMS is to reduce the total weight of the battery thermal management system while cooling the working temperature of the battery to the optimal temperature range.The experimental results show that the APE-BTMS-45 model has the best cooling performance under the same conditions.A numerical model of APE-BTMS based on COMSOL is established to compare the cooling performance of APE-BTMS at different ambient temperatures and more finely axial thickness.The numerical simulation results further verify that APE-BTMS-45 has the best cooling performance in the comparative data,and can reduce the weight by 216.71 kg at maximum.The research results of this paper can provide reference and data support for the design and development of battery thermal management system(BTMS)based on phase change materials.