某型号电池包螺栓松脱问题仿真分析  

Analysis on bolt connection looseness of pack battery

作　　者：张娜娜 李园园 牟莹莹 郑玉龙 ZHANG Nana;LI Yuanyuan;MOU Yingying;ZHENG Yulong(Weichai Power Co.,Ltd.,Weifang,Shandong Province,261000,China)

机构地区：[1]潍柴动力股份有限公司,山东潍坊261000

出　　处：《电池工业》2024年第6期305-308,共4页Chinese Battery Industry

摘　　要：针对某型号电池包进行横向随机振动测试时螺栓松脱的现象,搭建电池包有限元模型,施加螺栓预紧力,并且根据测试的加速度曲线在电池包固定点施加载荷,探究螺栓预紧力下降趋势,提出两种优化方案。结果表明:电池包在振动过程中前后两侧的螺栓预紧力下降显著,容易松脱,与测试结果一致;增加螺栓头接触面积对螺栓放松有益,但是影响并不大;变更螺栓规格为M8,螺栓预紧力基本不下降,可以有效防止螺栓松脱。With the aim at the looseness of pack bolt connection under transverse vibration load,the finite element model is established to investigate the decreasing trend of bolt preload.The modal is applied initial bolt preload.An alternating acceleration load is applied to the fixed points of pack battery.The results shows that the preload of bolts on both sides of pack decrease significantly.The phenomenon was consistent with the test.In order to optimize the design,the paper proposes two optimization schemes.Firstly,it has no obvious benefit that increasing the contact area between bolt head and plate.Secondly,the method of changing the bolt specification to M8 is carried out,which solves the problem of bolt connection looseness.

关 键 词：螺栓松脱 有限元仿真 振动载荷 螺栓预紧力 

分 类 号：TM911[电气工程—电力电子与电力传动]