电池模组热扩散精准建模及高效仿真研究  

Study on Accurate Modeling and Efficient Simulation of Thermal Runaway Propagation of Battery Modules

作　　者：邝男男 胡帛涛 栗国 赵光磊 冯爽 许立坤 Kuang Nannan;Hu Botao;Li Guo;Zhao Guanglei;Feng Shuang;Xu Likun(CATARC(Tianjin)Automotive Engineering Research Institute Co.,Ltd.,Tianjin 300300)

机构地区：[1]中汽研(天津)汽车工程研究院有限公司,天津300300

出　　处：《汽车工程》2024年第4期652-661,共10页Automotive Engineering

摘　　要：电池系统热失控扩散仿真是电池系统研发过程中的重要环节,其结果能够为电池系统安全设计优化提供指导建议。因此,在满足系统模型精度的前提下,为大幅提高研发效率,非常有必要对热失控扩散的数学模型进行合理简化。本文采用“单体-模组”的研究思路,基于传统热失控试验和数值模拟的结果,构建了以归一性生热方程为核心的简化电池模组热失控扩散模型,研究模型准确性及计算效率。结果表明:简化模型的计算时间为37 min,而相同条件下传统模型的计算时间为90 min左右,在模型精度达到90%的前提下,计算时间缩短了约2/3,显著降低了计算成本。本文的研究对电池包级别的热扩散高效快速仿真提供技术参考。The simulation of thermal runaway propagation in battery systems is an important step in the de‐velopment process of battery systems,the results of which can provide guidance and suggestions for the optimization of battery system safety design.Therefore,it is necessary to simplify the thermal runaway propagation model reason‐ably in order to significantly improve research and development efficiency while meeting the accuracy of the system model.Based on the traditional thermal runaway test and numerical simulation results of the cell,by adopting the re‐search approach of"cell-module",a simplified thermal runaway propagation model for battery modules with the normalized heat generation equation as the core is constructed in this paper to study the accuracy and computational efficiency of the model.The results show that the computational time of the simplified thermal runaway propagation model for battery modules is 37 minutes,while the computational time of the traditional module model is about 90 minutes under the same conditions.With the accuracy of the models reaching 90%,the computational time is short‐ened by about 2/3,significantly reducing the computational cost.The research in this paper provides technical refer‐ence for efficient and fast simulation of thermal propagation at the battery pack level.

关 键 词：锂离子电池 热失控 热扩散 热扩散模型 模型简化 

分 类 号：U469.7[机械工程—车辆工程] TM912[交通运输工程—载运工具运用工程]