1 Hebei Key Laboratory of Electric Machinery Health Maintenance & Failure Prevention, North China Electric Power University, Baoding 071003, Hebei, China 2 Hebei Engineering Research Center for Advanced Manufacturing & Intelligent Operation and Maintenance of Electric Power Machinery, North China Electric Power University, Baoding 071003, Hebei, China 3 Tianjin Product Quality Inspection Technology Research Institute, Electrical Technology Science Research Center, Tianjin 300384, China
Abstract: To meet the requirements of safety operation of lithium-ion batteries (LIBs) under mechanical abuse, a combined approach of experimental testing and finite element simulation was employed to investigate the deformation responses and failure mechanisms of LIBs under different compression conditions. A self-built three-dimensional digital image correlation platform was utilized to conduct compression experiments on 18650 cylindrical cells, and the mechanical-electro-thermal response behaviors of LIBs under various compression conditions were investigated, including plane compression, local indentation, and spherical indentation. Additionally, a multiphysics coupling model of cylindrical LIBs under compression loads was established using COMSOL Multiphysics. The influence of loading methods on the compression response of LIBs was discussed in detail, and the comparison of the simulated results with the experimental results showed good consistence. The research results indicate that consistent response characteristics are exhibited under plane compression and local compression conditions. The load-bearing capacity reaches its peak and then declines rapidly. Moreover, the peak force of the battery under plane compression is higher than that under local indentation, and the load-bearing capacity of the cell increases with the state of charge (SOC). This work offers valuable insights for the multifunctional design and safety assessment of LIBs.
通讯作者:
* 张新春,工学博士,华北电力大学机械工程系副教授,河北省电力机械装备健康维护与失效预防重点实验室副主任。2011年1月在北京交通大学力学系工程力学专业博士毕业后到华北电力大学工作至今。目前主要从事新型功能/智能材料与结构、新能源电池、冲击动力学等方面的研究工作。发表论文70余篇,包括International Journal of Impact Engineering、International Journal of Mechanical Sciences、Journal of Sandwich Structures and Materials、Defence Technology、International Journal of Applied Mechanics、Thin-Walled Structures、《爆炸与冲击》等。xczhang@ncepu.edu.cn
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