基于新型流道液冷板的动力电池热管理性能  

Study on thermal management performance of power batteries based on new flow passage liquid cooling plate

作　　者：李潇 陈江英 李翔晟[1] LI Xiao;CHEN Jiang-ying;LI Xiang-sheng(Imastitute of Mechanical and Electrical Engineering,Central South University of Forestry Science and Technology,Changsha Hunan 410004,China;Automotive Engineering Institute,Zotye Holding Group,Hangzhou Zhejiang 310018,China)

机构地区：[1]中南林业科技大学机电工程学院,湖南长沙410004 [2]众泰控股集团汽车工程研究院,浙江杭州310018

出　　处：《电源技术》2020年第10期1438-1442,共5页Chinese Journal of Power Sources

基　　金：湖南省自然科学基金省市联合项目(14JJ5014)。

摘　　要：为了强化动力电池热管理系统的性能,提高电池组的散热能力和温度一致性,提出了一种基于对角双向流道结构的液冷板新设计方案。以多排布置的方形锂离子电池组为研究对象,借鉴Bernardi生热速率模型,运用Flotherm有限元分析软件建立液冷式锂离子电池组热管理系统的CFD仿真模型,通过调节该液冷板的结构参数,对冷板结构进行优化,满足系统的散热能力和温度一致性要求。研究结果表明:该液冷板在满足散热能力的同时能够很好地控制电池组的温度一致性,电池组的最大温差为2.4℃,相较于其他两种结构形式的液冷板,其温度一致性优势明显;通过调节该液冷板中矩形流道的宽度、相关流道的间距和冷却液流动速度,散热能力和温度一致性得到加强,最大温差极限可降至1.0℃,保证电池组处于合适的工作温度范围内。In order to enhance the performance of the thermal management system of power batteries,improve the heat dissipation capacity and temperature consistency of the battery pack,a new design idea(scheme)of the liquid cooling plate based on the diagonal two-way passage structure was proposed.Taking the square lithium-ion battery pack with multi row arrangement as the research object,the Bernardi heat generation rate model was used for reference,and the CFD simulation model of the thermal management system of the liquid cooling lithium-ion battery pack was established by using Flotherm finite element analysis software.By adjusting the structural parameters of the liquid cooling panel,the structure of the cold panel was optimized to meet the requirements of the heat dissipation capacity and temperature consistency of the system.The results show that the liquid cooling plate can control the temperature consistency of the battery pack while satisfying the heat dissipation capacity.The maximum temperature difference of the battery pack is 2.4℃,which has obvious advantages over the other two types of liquid cooling plate.By adjusting the width of the rectangular passage,the spacing of the relevant passages and the flow speed of the liquid cooling plates,the consistency of the heat dissipation capacity and the temperature is enhanced,and the maximum temperature difference can be reduced to 1.0℃,so as to ensure that the battery pack is in the proper working temperature range.

关 键 词：锂离子电池 热管理 液冷板结构 双向流道 仿真模型 

分 类 号：TM912[电气工程—电力电子与电力传动]