Optimization of Lithium-Ion Battery Pouch Cell for Maximization of Energy Density while Preventing Internal Short Circuit Caused by Separator Failure under Crush Load

被引:9
|
作者
Kim, Ji-San [1 ]
Lee, Dong-Chan [2 ]
Lee, Jeong-Joo [1 ]
Kim, Chang-Wan [2 ]
机构
[1] Konkuk Univ, Grad Sch Mech Engn, Seoul 05029, South Korea
[2] Konkuk Univ, Sch Mech Engn, Seoul 05029, South Korea
基金
新加坡国家研究基金会;
关键词
Lithium-ion battery; Internal short circuit; Energy density; Optimization; Separator failure; Crush load; MECHANICAL-PROPERTIES; DESIGN; PERFORMANCE; SIMULATION; THICKNESS; BEHAVIOR; MODEL;
D O I
10.1149/1945-7111/abebf5
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Lithium-ion batteries (LIBs) for electric vehicles are exposed to large deformations and damage caused by vehicle accidents. Therefore, there exists an internal short circuit (ISC) risk owing to separator failure. This paper proposes a framework for optimizing the energy density while preventing the separator failure of a LIB pouch cell. In this study, the separator failure of the pouch cell was evaluated according to the SAE J2464 crush test standard using a representative sandwich (RS) mechanical model. The energy density and power density performance were evaluated by constant current discharge using an electrochemical model. The constraints of the optimization process were the separator strain evaluated by the crush test and the power density of the initial design. The optimal solution was obtained using a metamodel and global optimization algorithm. The optimization improved the energy density by 9.57% and ensured the safety of the LIB pouch cell separator under a crush load.
引用
收藏
页数:9
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