PCM与液体协同冷却的电池组热仿真研究  

Thermal simulation research on battery pack cooled by PCMand liquid

作　　者：王印霜 邹得球[1] 贺瑞军 马群 WANG Yinshuang;ZOU Deqiu;HE Ruijun;MA Qun(Faculty of Maritime and Transportation,Ningbo University,Ningbo Zhejiang 315211,China)

机构地区：[1]宁波大学海运学院,浙江宁波315211

出　　处：《电源技术》2021年第10期1292-1297,共6页Chinese Journal of Power Sources

基　　金：浙江省自然科学基金项目(LY17E060001);宁波市自然科学基金项目(2019A610012)。

摘　　要：采用在定型复合相变材料内部构建液体通道设计,实现相变材料与液体协同冷却,可以改善电池组传热能力,提升电池组电性能和延长循环寿命。利用ANSYS软件建立了三维模型,在此基础上进行冷却通道结构、冷却液的流速、入口温度、通道壁厚和热导率对电池组冷却效果的影响的仿真,仿真计算数据表明:(1)冷却通道结构采用并行通道方式可显著降低电池模块最高温度,改善温度均匀性;(2)提高冷却液流速可降低电池组最高温度和温差,当流速>0.15 m/s后,继续提高流速,电池组冷却效果的改善不明显;(3)电池组温度随着通道的热导率的提高而降低,当热导率>3 W/(m·K)时,继续提高热导率,电池组的温度降低不明显。The liquid channel was designed to construct the liquid channel inside the shaped composite phase change material.It could improve the heat transfer ability,enhance the electrical performance and prolong the cycle life of the battery pack.The three-dimensional model was established using ANSYS software,the heat transfer characteristics were simulated and analyzed,and the model was verified with the experimental results.On this basis,the effects of cooling channel structure,coolant velocity and inlet temperature,channel wall thickness and thermal conductivity on the cooling effect of the battery pack were studied.The results show that:(1)The parallel channel can significantly reduce the maximum temperature of the battery module and improve the temperature uniformity.(2)Increasing the coolant flow rate can reduce the maximum temperature and temperature difference of the battery pack.When the flow rate is greater than 0.15 m/s,the cooling effect of the battery pack is not significantly improved by increasing the flow rate;(3)The temperature of the battery decreases with the increase of thermal conductivity of the channel.When the thermal conductivity is greater than 3 W/(m·K),the temperature of the battery does not decrease significantly with the increase of thermal conductivity.

关 键 词：数值模拟 动力电池组 协同冷却 热管理 强化传热 

分 类 号：TM912[电气工程—电力电子与电力传动]