基于交通事故统计的电池包底部碰撞研究  

Study on the Collision of Battery Pack Bottom Based on Traffic Accident Statistics

作　　者：王月 辛鹏程 周大永 李钢 唐莉 王鹏翔 Wang Yue;Xin Pengcheng;Zhou Dayong;Li Gang;Tang Li;Wang Pengxiang(Geely Auto Research Institute Co.,Ltd.,Ningbo 315336)

机构地区：[1]吉利汽车研究院(宁波)有限公司,宁波315336

出　　处：《汽车工程》2021年第11期1730-1735,共6页Automotive Engineering

基　　金：浙江省汽车安全技术研究重点实验室开放基金(GL/20-002X)资助。

摘　　要：为降低新能源车电池包底部碰撞导致的潜在起火风险,本文中通过对交通事故统计分析研究,总结了电池包底部碰撞的典型工况,包括向上撞击和水平撞击。建立了电池包底部碰撞分析的有限元模型,并对不同工况进行了仿真。结果表明:在向上撞击工况中,对电池包造成损伤的主要由于Z向速度冲击的作用。其中锥形地障可直接导致底壳失效,在壳体不失效的条件下,半球头地障的损伤较为严重;水平撞击工况中整车最小离地间隙位置和电池包前部防护结构的设计对该工况有重大影响。In order to reduce the potential fire risk caused by the collision on the bottom of battery pack in new energy vehicle,the typical conditions of upward collision onbattery bottom are summarized,including upward collision on battery bottom and horizontal collision based on statistical analysis on traffic accidents.A finite element model for the collision analysis on battery bottom is built with simulation on different conditions conducted.The re⁃sults show that in the condition of upward collision,the damage of battery pack is mainly caused by the action of speed shock alone Z direction.Among them,cone-shaped ground obstaclecan directly lead to the failure of battery bottom,in the condition without housing failure,semi-spherical ground obstacle will cause severer damage,and in the condition of horizontal collision,the determination of the position of minimumground clearance and the design of the front protection structure of battery pack have significant influences.

关 键 词：电池包 碰撞 典型工况 

分 类 号：U469.7[机械工程—车辆工程] U491.3[交通运输工程—载运工具运用工程]