基于CFD数值模拟的动力锂电池温度场研究  

Research of Temperature Field of Power Lithium Battery Based on CFD Numerical Simulation

作　　者：张洪利 王飞 任城 熊皓俊 李兰友 杨爱喜 Zhang Hongli;Wang Fei;Ren Cheng;Xiong Haojun;Li Lanyou;Yang Aixi

机构地区：[1]杭州职业技术学院,浙江杭州310018 [2]奇瑞新能源汽车股份有限公司,安徽芜湖241000

出　　处：《时代汽车》2025年第5期122-124,150,共4页Auto Time

基　　金：2023年度高校国内访问工程师“校企合作项目”项目“电动汽车动力锂电池热管理与散热机理及控制关键技术研究”的研究成果(编号:FG2023044,项目主持人:张洪利);杭州职业技术学院高层次人才科研启动费,技术开发项目“智能移动自卸充电车开发”(编号:2023HX051);浙江省高职教育“十四五”第二批教学改革项目“科教融汇赋能‘大师育匠’拔尖式人才培养的策略与路径研究”(编号:jg20240113)。

摘　　要：采用CFD数值模拟对新能源汽车动力锂电池包内部温度场进行分析,电池包采取强制风冷方式,冷却气流流量为140m3/h。设定汽车夏季运行环境温度35℃和40℃,冷却气流温度为25℃和30℃,对某型号电池包在1C放电倍率和1.5C充电倍率,共四种工况下数值模拟分析其内部温度场分布,得出电池包内部气流速度流线图、气流温度流线图、电池包内部切面温度云图、电池模组表面温度云图以及表面平均温度值等结果。对比四种工况下的模拟分析结果,随着靠近电池包出口区域距离减小,电池模组表面温度明显上升,模组4表面温度最高,且温度最高区域在模组的中央;各模组内部切面温度呈现阶梯状分布,模组4切面温度最高;工况1和工况2下各模组表面温度满足设计要求,工况3和工况4下需进一步优化电池包模组和冷却流道。The internal temperature fi eld of electric vehicle power lithium battery pack was analyzed with CFD numerical simulation.The battery pack adopted forced air cooling mode,and the cooling fl ow rate was 140 m3/h.The ambient temperature of the vehicle in summer was set at 35℃and 40℃,and the cooling air temperature was set at 25℃and 30℃.The internal temperature fi eld distribution of the battery pack was analyzed numerically under four working conditions of 1C discharge rate and 1.5C charge rate.The airfl ow velocity diagram,airfl ow temperature diagram,section temperature image of battery pack,surface temperature image of battery module,and average surface temperature of battery pack were obtained.Comparing with the simulation analysis results under the four conditions,the surface temperature of battery module increases obviously with the decrease of the distance near the outlet area of the battery pack.The surface temperature of module 4 is the highest,and the highest temperature area is in the center of the battery module.The section temperature of each module presents a stepped distribution,and the section temperature of module 4 is the highest.The surface temperature of each module meets the design requirements under working conditions 1 and 2,and the battery module and cooling channel should be further optimized under working conditions 3 and 4.

关 键 词：数值模拟 CFD 动力锂电池 放电倍率 温度场 

分 类 号：TM9[电气工程—电力电子与电力传动]