基于有限元模型的动力电池冷却系统优化设计  

Optimization Design of Power Battery Cooling System Based on Finite Element Analysis

作　　者：丁亚运 于红丞 乾超群 徐海军 张礼元 DING Yayun;YU Hongcheng;QIAN Chaoqun;XU Haijun;ZHANG Liyuan(School of Automotive Studies,Tongji University,Shanghai 201804,China;Shanghai Yirui Automobile Technology Co.,Ltd.,Shanghai 201800,China)

机构地区：[1]同济大学汽车学院,上海201804 [2]上海翼锐汽车科技有限公司,上海201800

出　　处：《汽车零部件》2023年第10期34-38,共5页Automobile Parts

摘　　要：为满足某车用动力电池冷却系统热扩散稳定性的要求,对车用动力电池冷却系统进行结构设计及分析。利用3D绘图软件CATIA对动力电池冷却系统零部件进行结构设计,再通过STAR-CCM+对冷却板流道建立仿真模型,包括设定材料物性及电池模组放电发热功率等。对流道及温度场进行仿真分析,验证模型流道设计的正确性和可行性。在此基础上,确定冷却系统工作时各个液冷板的温度。各个液冷板及模组的温度差应控制在5℃以内,通过对相关流道管径进行结构优化来保证各个液冷板冷却液的流量均衡。最后,仿真计算常温高速行车、高温冷却、低温加热3种工况下冷却系统的有效性。结果表明,设计的冷却系统流道结构满足热扩散稳定性要求。In order to meet the requirements of thermal diffusion stability of a vehicle power battery cooling system,the structure of the vehicle power battery cooling system is designed and analyzed.The 3D drawing software CATIA is used to design the structure of the components of the power battery cooling system,and then the simulation model of the cooling plate channel is established through star CCM+,including setting the material properties and the discharge heating power of the battery module.The flow channel and temperature field are simulated and analyzed to verify the correctness and feasibility of the model flow channel design.On this basis,the temperature of each liquid cooling plate of the cooling system is determined.In order to control the temperature difference between each liquid cooling plate and module within 5℃,the structure of the relevant channel diameter is optimized to ensure the balance of the coolant flow of each liquid cooling plate.Finally,the effectiveness of the cooling system is simulated under three working conditions:normal temperature and high-speed driving,high-temperature cooling and low-temperature heating.The results show that the designed channel structure of the cooling system meets the requirements of thermal diffusion stability.

关 键 词：车用动力电池 冷却系统 液冷板 热扩散 温度均匀性 

分 类 号：U469.72[机械工程—车辆工程]