摘要
近年来动力锂电池在新能源车上的应用越来越广泛,同时储能单元锂电池的热安全问题受到广泛关注。利用COMSOL Multiphysics软件对集总参数化的锂离子电池组液冷系统进行几何建模与热分析,研究并对比有液冷系统与被动散热系统对工作电池温度的影响,在此基础上进一步探究电池的放电倍率、冷却液温度和冷却液流速对液冷系统冷却效果的影响。结果表明:高放电倍率会导致电池组最大温度与最大温差上升;在考虑冷却成本的情况下,当环境温度为20℃时,20℃为冷却液的最适温度;冷却液流速对电池组散热性能的影响较小。在液冷系统的作用下,电池组温度能够得到有效控制,为优化液冷系统提供了有力的参考。
Recently,the application of power lithium batteries in new energy vehicles has become increasingly widespread,and the thermal safety issues of energy storage units,particularly lithium-ion batteries,have received extensive attention.Geometrical modelling and thermal analysis of the battery pack by utilizing COMSOL Multiphysics software to simulate the lumped parameterized lithium-ion battery pack liquid cooling system was performed.Then the impact of the liquid cooling system or passive cooling system on the operating temperature of the battery were investigated and compared,and the effects of battery discharge multiplier,coolant temperature,and coolant flow rate on the cooling efficiency of the liquid cooling system were further explored.The results indicated that a high discharge rate led to an increase in both the maximum temperature of the battery pack and the maximum temperature difference.Considering cooling costs,a coolant temperature of 20℃was found to be optimal when the ambient temperature was 20℃.The coolant flow rate had a relatively minor impact on the thermal performance of the battery pack.By implementing the liquid cooling system,the temperature of the battery pack could be effectively controlled,providing a strong reference for optimizing the liquid cooling system.
作者
袁国豪
吴肖龙
李曦
YUAN Guohao;WU Xiaolong;LI Xi(School of Information Engineering,Nanchang University,Nanchang 330031,China;School of Artificial Intelligence and Automation,Huazhong University of Science and Technology,Wuhan 430074,China)
出处
《南昌大学学报（工科版）》
CAS
2024年第3期377-385,共9页
Journal of Nanchang University(Engineering & Technology)
基金
国家自然科学基金资助项目(62203204,U2066202)
江西省自然科学基金资助项目(20232BAB202028)。
关键词
锂离子电池组
液冷系统
电池组建模
散热分析
lithium-ion battery pack
liquid cooling system
battery pack modeling
thermal analysis
