车用三元锂电池的面外挤压响应特性仿真及失效分析OA
Out-of-plane compression response simulation and failure analysis of automotive ternary lithium-ion batteries
针对车用三元锂电池机械滥用条件下的内短路失效问题,采用实验与仿真相结合的方法,探究三元锂电池的面外挤压响应特性.首先,通过电池单体与内芯的准静态加载实验,结合实验现象与载荷-位移曲线分析电池失效过程.接着,采用参数优化方法确定关键失效参数,建立外壳-内芯耦合的三元锂电池有限元模型.仿真结果表明,所建立的模型能准确表征电池在挤压工况下的力学特性,短路失效位移与失效载荷的预测精度分别达到 92.8%和 96.4%.最后,通过对比分析不同挤压工况下的变形响应,探究受压工况与内短路失效的关联机制,为电池失效评估提供理论依据.
To investigate the internal short circuit failure of automotive ternary lithium-ion batteries under mechanical abuse,this study combines experimental and simulation methods to analyze out-of-plane compression response characteristics of batteries.Initially,quasi-static loading experiments were conducted on both batteries and jellyrolls,and failure process analyzed through experimental observa-tions and loading-displacement curves.Subsequently,key failure parameters were determined via parameter optimization,enabling the establishment of a finite element model coupling battery's shell and jellyroll.Results demonstrate that the proposed model accurately captures the mechanical behavior under compression,achieving prediction accuracies of 92.8%for short-circuit failure displacement and 96.4%for failure load.Furthermore,by comparing the deformation responses under different compres-sion conditions,the correlation between mechanical abuse and internal short circuit failure was revealed.The research provides theoretical basis for failure assessments of lithium-ion batteries.
黎衍;刘亚铭;于潇雁;姚立纲
福州大学机械工程及自动化学院,福建 福州 350108福州大学机械工程及自动化学院,福建 福州 350108福州大学机械工程及自动化学院,福建 福州 350108福州大学机械工程及自动化学院,福建 福州 350108
交通工程
三元锂电池挤压响应特性内短路失效机械滥用
ternary lithium-ion batterycompression response characteristicsshot circuit failuremechanical abuse
《福州大学学报（自然科学版）》 2026 (1)
25-31,7
科技部国家重点研发计划资助项目(2022YFB4702401)
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