基于整车系统的动力电池包底部碰撞安全性试验研究  

Safety Test Study of Power Battery Pack Bottom Impact Based on Vehicle System

作　　者：习波波 商恩义 李月明 王鹏翔 周大永 XI Bobo;SHANG Enyi;LI Yueming;WANG Pengxiang;ZHOU Dayong(Zhejiang Key Laboratory of Automobile Safety Technology,Geely Automobile Research Institute(Ningbo)Co.,Ltd.,Ningbo Zhejiang 315336,China)

机构地区：[1]浙江省汽车安全技术研究重点试验室,吉利汽车研究院(宁波)有限公司,浙江宁波315336

出　　处：《汽车零部件》2022年第1期76-81,共6页Automobile Parts

基　　金：国家重点研发计划资助(2018YFE0192900)。

摘　　要：为提升电动汽车的行车安全性,揭示电动汽车车用动力电池包底部在机械滥用下的力学特征及行为特点,对电池包底部碰撞工况进行事故统计分析,设计了一种整车工况下电池包底部机械滥用的碰撞测试方案,探索电池包底部机械滥用过程中电池电压及结构等变化。结果表明:新能源汽车动力电池底部与障碍物作用过程为跳跃式接触,变形模式为锯齿波式;试验后模组内部结构凹陷变形及损坏无法识别,车辆若继续充放电使用,行车风险较大。最后指出当前底部碰撞工况存在的问题及未来研究重点,为新能源电池底部防护开发提供了相应的测试方法及研究依据。To improve the driving safety of electric vehicles,and the mechanical characteristics and behavior characteristics of the battery pack bottom of electric vehicle under mechanical abuse were revealed.Based on the investigation and statistical analysis of related vehicle bottom impacted condition accident,the collision test scheme for battery pack bottom mechanical abuse under vehicle condition was designed,and the changes of battery voltage and structure were explored in the process of mechanical abuse at the bottom of battery pack.The test results show that the action process between the bottom of the power battery of new energy vehicle and obstacle is leaping contact,and the deformation mode is sawtooth wave.After the test,the deformation and damage of the battery internal structure of the module couldn't be identified easily.If the vehicle continues to use after battery charged and discharged,it is risky during driving.Finally,the problems existing in the bottom impact condition and the focus of future research were pointed out,and the corresponding test method and research basis were provided for the development of new energy battery bottom protection.

关 键 词：电池包 机械滥用 底部碰撞 安全性 底部防护 

分 类 号：U467.14[机械工程—车辆工程]