电池包侧面碰撞仿真响应特性和安全性分析

Analysis of response characteristics and safety of battery pack side impact simulation

为了探究电池包箱体及其内部结构的安全性问题,结合企业某款纯电动汽车的电池包几何模型,采用均质化的建模方法建立包含电池箱体、电池模组、模组固定支架、连接螺钉、电芯连接铜片及其他结构件的精细化电池包有限元模型,并考虑电池包的实际安装位置,进行整车侧面碰撞仿真分析。从车体结构、电池箱体、电池包内部模组等多个层面综合评价电池包碰撞安全性,结果表明,在侧面碰撞过程中电池包没有短路风险,满足法规中对碰撞后电池包安全性的相关要求。

In order to explore the impact of the battery pack box and its internal structure on the safety of the battery pack,a modeling method as homogeneous was used to establish a detailed finite element model of the battery pack including the battery box,battery module,module fixing bracket,connecting screws,copper sheet connectingbattery core and other structural parts.And the simulation analysis of the vehicle’s side collision was performed.Comprehensively evaluated the safety of the battery pack from the car body structure,battery box,internal module of the battery pack,etc.The results showed that there was no risk of short circuit during the side collision,which met the relevant requirements of the regulations on the safety of the battery pack after the collision.