复合液冷电池热管理模组结构性能优化设计  

Optimized Design of Structural Performance for Composite Liquid-Cooled Battery Thermal Management Modules

作　　者：唐伟哲 梁伟[1] 徐峰 张晓鹏 沈浩 TANG Weizhe;LIANG Wei;XU Feng;ZHANG Xiaopeng;SHEN Hao(School of Mechatromechanical and Vehicle Engineering,Chongqing Jiaotong University,Chongqing 400074,China)

机构地区：[1]重庆交通大学机电与车辆工程学院,重庆400074

出　　处：《汽车工程学报》2025年第1期22-30,共9页Chinese Journal of Automotive Engineering

基　　金：重庆市自然科学基金面上项目(CSTB2022NSCQ-MSX1444)。

摘　　要：在试验验证单电池生热模型准确性的基础上,提出了一种耦合相变材料(PCM)的液冷系统热管理电池模组,采用数值模拟方法定量研究了冷道数量、流速、冷道布置、冷板厚度对电池组最高温度和温度均匀性的影响。结果表明,在4 C放电倍率、35℃时,3条冷道时改变冷却液的流速对电池模组的最高温度和最大温差影响最大,冷却液流速超过0.2 m/s,电池模组散热性能提升不再显著;在冷道数量相同的条件下,冷却液进出口交错分布的电池组间温度和轴向温度均匀性最好;在冷却流速和冷道数量相同的条件下,冷板厚度增大能同时降低电池模组的最高温度和最低温度,在冷道数量为3时,厚度到达8 mm之后对温度的影响不再显著。Based on the experimental validation of a single-cell heat generation model,this paper proposes a thermal management battery module for a liquid-cooled system integrated with phase change material(PCM).The effects of the number of cooling channels,flow rate,cold channel arrangement and cooling plate thickness on the maximum temperature and temperature uniformity of the battery pack are quantitatively studied by using numerical simulation methods.The results show that at the discharge rate of 4 C and 35℃,altering the coolant flow rate in three cooling channels can greatly affect the maximum temperature and the maximum temperature difference of the battery module.Furthermore,once the coolant flow rate exceeds 0.2 m/s,the heat dissipation performance of the battery module does not show significant improvement.With the same number of cooling channels,the best temperature uniformity between battery packs and along the axial direction is achieved with a staggered distribution of coolant inlets and outlets.When the cooling flow rate and the number of cooling channels remain constant,increasing the thickness of the cooling plate can reduce both the maximum and minimum temperatures of the battery module.However,once the thickness reaches 8 mm with three cooling channels,further changes in temperature become negligible.

关 键 词：相变材料 冷道设计 最高温度 温度均匀性 

分 类 号：TM912[电气工程—电力电子与电力传动]