基于CFD的某电动车电池包结构设计及热分析  

Design and Thermal Analysis of an Electric Vehicle Battery Pack Based on CFD

作　　者：杨润泽[1] 程鑫 Yang Runze;Cheng Xin(Hubei Key Laboratory of Automotive Power Train and Electronic Control,Hubei University of Automotive Technology,Shiyan 442002,China)

机构地区：[1]湖北汽车工业学院汽车动力传动与电子控制湖北省重点实验室

出　　处：《湖北汽车工业学院学报》2019年第3期34-38,共5页Journal of Hubei University Of Automotive Technology

基　　金：汽车零部件技术湖北省协同创新项目(2015XTZX04);湖北省教育厅科学研究项目(B2015123)

摘　　要：建立了某电动车电池包3维模型,并采用数值模拟方法分析了电池包自然对流和强制通风冷却时的稳态温度场,结果表明2种方式都不能较好地满足电池的散热要求;据此设计了5种结构改进方案。通过CFD模拟发现:在电池包中部设置开口挡板并依次错位布置进风口、通风口和出风口,可以达到较好的散热效果,电池包最高温度下降了8.3℃、最大温差下降了7.3℃、单体电池的最大温差下降了6.1℃。A three-dimensional model of an electric vehicle battery pack was established,and the steady-state temperature fields of the battery pack during natural and forced convection were analyzed by numerical simulation.The results show that the two methods can not satisfy the demand of cooling.Hereby,five schemes of battery pack structure improvement were designed.Based on CFD simulation,it is found that the opening baffle is arranged in the middle of the battery pack,and the air inlet,vent and outlet are arranged in a dislocation mode to achieve better cooling performance,the maximum tem?perature of the battery pack is reduced by 8.3℃,the maximum temperature difference is reduced by 7.3℃,the maximum temperature difference of the single battery is reduced by 6.1℃.

关 键 词：电池热管理 自然对流 强制对流 温度场 

分 类 号：U469.72[机械工程—车辆工程] TM912[交通运输工程—载运工具运用工程]