方形锂离子电池挤压损伤仿真方法研究  

Research on simulation method of damage for squaring lithium-ion battery

作　　者：祝茂宇 何见超 刘飞 李辉 ZHU Maoyu;HE Jianchao;LIU Fei;LI Hui(SVOLT Energy Technology(Wuci)Co.,Ltd.,Wuci,Jiangsu Province,214000,China)

机构地区：[1]蜂巢能源科技(无锡)有限公司,江苏无锡214000

出　　处：《电池工业》2024年第5期258-265,共8页Chinese Battery Industry

基　　金：国家重点研发计划“车载储能系统安全评估技术与装备”(项目号2021YFB2501500)。

摘　　要：随着新能源汽车的普及,动力电池的安全性问题也逐渐受到关注。其中,电池单体在不同外部载荷作用下的损伤研究对电池包的结构设计至关重要。本文首先从试验角度探寻了电芯在不同方向挤压下的失效过程机理,然后建立了不同方向挤压电芯的损伤预测模型,可实现不同方向挤压作用下的电芯失效边界的预测及部分挤压场景下极片变形量预测,并将仿真计算结果与试验实测值进行了对比,验证了仿真模型预测结果的准确度。通过仿真确定了电池单体的损伤极限形变量和所能承受的最大挤压力,为电池包的结构设计提供了重要参考依据。With the popularity of new energy vehicles,the safety of power batteries has gradually attracted attention,among which the damage research of battery cells under different external loads is the basis for the structural design of battery packs.In this paper,the failure process mechanism of extrusion in different directions is explored from the experimental point of view,and then the damage prediction model of extrusion cell in different directions is established,which can realize the prediction of the failure boundary of the cell under the action of extrusion in different directions and the prediction of the deformation of the pole piece under the partial extrusion scenario.The accuracy of the simulation model is verified.The damage limit shape variable and the maximum extrusion pressure of the battery were determined by simulation,which provided an important reference for the structural design of the battery pack.

关 键 词：电池 有限元模型 挤压方向 损伤边界 

分 类 号：TM911[电气工程—电力电子与电力传动]