【作者】 李书华； 唐正； 吴钇陶； 王鹏； 汪永嘉；

【Author】 Li Shuhua;Tang Zheng;Wu Yitao;Wang Peng;Wang Yongjia;School of Automotive and Transportation Engineering,Hefei University of Technology;Pan Asia Technical Automotive Center Co.,Ltd.;

【机构】 合肥工业大学汽车与交通工程学院； 泛亚汽车技术中心有限公司；

【摘要】 为了提升动力电池热管理系统在充放电和热失控工况下的安全性能,本文提出了一种集气凝胶隔热垫、相变材料和液冷系统三种措施于一体的复合式动力电池热管理结构。在极端充放电循环工况和热失控工况下,验证了该热管理结构的有效性。在此基础上,通过基于改进的非支配排序遗传算法(Non-dominated Sorting Genetic AlgorithmⅡ,NSGA-Ⅱ)的多目标优化算法对该热管理结构进行优化。与优化前相比,极端充放电工况下,动力电池最高温度降低了15.03%,电池间最大温差降低了11.75%;热失控工况下,未发生热失控电池的最高温度降低了49.76%。该设计可有效阻断热失控传播,进一步提升热管理系统的性能。更多还原

【Abstract】 To improve the safety of the battery thermal management system under the charge-discharge cycle conditions and thermal runaway conditions,this paper proposes a composite battery thermal management system that integrates three measures:airgel heat insulation pad,phase change material and liquid cooling system.The effectiveness of the thermal management structure proposed is verified under extreme charge-discharge cycle conditions and thermal runaway conditions.On this basis,the thermal management structure is optimized with a multi-objective optimization algorithm based on NSGA-Ⅱ(Non-dominated Sorting Genetic Algorithm Ⅱ).Compared to the initial structure,the optimized structure results in a 15.03% reduction and a ll.75% reduction in the highest temperature and the maximum temperature difference between batteries,respectively,under extreme charge-discharge cycle conditions.And the maximum temperature of the battery without thermal runaway decreases by 49.76%,which further improves the performance of the thermal management structure.更多还原