动力锂离子电池风冷散热CFD仿真  

An simulation study on lithium-ion battery pack for air cooling heat dissipation on CFD

作　　者：王盛 任润国 尉庆国[1] 袁文奇 WANG Sheng;REN Runguo;WEI Qingguo;YUAN Wenqi(School of Energy and Power Engineering,North University of China,Taiyuan 030051,China;Shanxi New Energy Vehicle Industry Co.,Ltd.,Jinzhong 030600,China;Inner Mongolia First Machinery Group Co.,Ltd.,Baotou 014032,China)

机构地区：[1]中北大学能源与动力工程学院,太原030051 [2]山西新能源汽车工业有限公司,山西晋中030600 [3]内蒙古第一机械集团有限公司,内蒙古包头014032

出　　处：《重庆理工大学学报(自然科学)》2023年第11期103-112,共10页Journal of Chongqing University of Technology:Natural Science

基　　金：国家自然科学基金项目(51905496)。

摘　　要：为解决电动赛车在FSEC竞赛中动力电池散热不良的问题,基于赛事各工况,采用CFD数值仿真和正交试验相结合的方法,以电池最高温度和温差最小化作为优化目标,针对赛事各工况下存在的散热问题对赛车的电池包散热系统进行分析和优化。通过模拟赛事工况下的实车跑动试验和仿真计算,优化后的散热系统较原系统在整体温控、温度均一性和散热稳定性方面均有大幅度提升。优化后的散热系统能满足FSEC赛事各个工况下的散热要求,在最高温度和最大温差方面的优化率可达15.08%和86.58%,优化效果显著。整个优化过程采用正交试验法进行,并将电池包温度的均布性和电池箱体热量的聚集情况等过程性因素作为辅助优化指标,遴选最优散热方案。相对于全面试验法整个探究过程简洁高效,对其他汽车风冷散热系统的设计和优化有一定的借鉴和参考价值。To address the poor battery heat dissipation in electric racing cars at FSEC,this paper aims to optimize the maximum battery temperature and minimum temperature differences through an integration of CFD numerical simulation and orthogonal tests.Under various working conditions,the existing problems of the battery heat dissipation system of a racing car is analyzed and a optimized cooling system is proposed.The new system markedly improves the overall battery temperature control,cooling system structure and heat dissipation stability compared to the previous ones.In addition,it meets the thermal requirements of the FSEC event under various operating conditions,with an optimization rate of 15.08%for the maximum temperature and 86.58%for the maximum temperature difference.The whole optimization process is completed by employing the orthogonal test method.The process-related factors including the homogeneity of the battery temperature distribution and the heat accumulation of battery compartment serve as a reference indicators for the selection of the optimal heat dissipation solution.The orthogonal test method is less complex and more efficient compared with the full-scale test method,and thus may provide some insights for the design and optimization of other automotive air-cooling heat dissipation systems.

关 键 词：流体仿真 风冷散热 正交试验 锂离子电池 

分 类 号：TM912[电气工程—电力电子与电力传动]