摘要
动力电池包受到局部挤压发生短路失效会影响电动汽车正常行驶,甚至发生严重事故,侧向挤压和底部托底是局部挤压的典型工况,对其进行研究十分必要。利用Hypermesh软件分别建立电池包侧挤压和底部托底仿真模型并进行分析计算。基于力、速度载荷研究挤压力与变形关系,发现速度载荷在一定范围内与力载荷效果具有一致性,且合理选择速度参数可节省计算时间。不同形状几何体托底电池包时,异物尖锐度和托底面积是影响底板变形程度的主要因素。该仿真研究可为电池包侧挤压分析参数设置和异物托底变形评判提供重要参考。
The short-circuit failure of the power battery pack caused by local compression will affect the normal driving of electric vehicles,and even cause serious accidents.Side extrusion and bottom impact are typical cases,which are necessary to study.The simulation models of side extrusion and bottom impact conditions were established with Hypermesh,then performing analysis and calculation.Based on different loads of force and speed,the relationship between the side extrusion force and deformation of the battery pack was studied,and it was found that the velocity load was consistent with the force load effect within a certain range.Reasonable velocity parameters could save calculation time.The sharpness of geometric objects and the supporting area were the main factors affecting the accuracy of deformation of the bottom plate.This simulation study can provide an important reference for the battery pack side extrusion analysis parameter setting and foreign body support deformation evaluation.
作者
朱红霞
胡淼
李欣
ZHU Hongxia;HU Miao;LI Xin(Lingyun Industrial Co.,Ltd.,Shanghai 201708,China)
出处
《电源技术》
CAS
北大核心
2021年第6期740-743,共4页
Chinese Journal of Power Sources
关键词
电池包
侧挤压
底部托底
仿真分析
battery pack
side extrusion
bottom impact
simulation analysis
作者简介
朱红霞(1986-),女,河北省人,工程师,硕士,主要研究方向为新能源动力电池包机械性能。
