车载动力电池包的有限元分析及轻量化设计  

Finite Element Analysis and Lightweight Design of Vehicle Power Battery Pack

作　　者：鲁春艳[1] 田菲[1] 万长东[1] LU Chun-yan;TIAN Fei;WAN Chang-dong(School of Mechano-Electronic Engineering,Suzhou Vocational University,Suzhou 215100,China)

机构地区：[1]苏州市职业大学机电工程学院,江苏苏州215100

出　　处：《机械工程与自动化》2022年第1期84-87,共4页Mechanical Engineering & Automation

基　　金：江苏省自然科学基金(BK20171225);苏州市科技计划项目(SYG202044);苏州市职业大学创新基金项目(SVU2019CX01)。

摘　　要：为了实现动力电池包的轻量化,并避免电池包在使用时产生的频率共振问题,对动力电池包的3种典型工况进行结构强度分析及模态响应分析。采用变密度法建立了以电池包柔度最小为优化目标、单元节点位移为设计变量、电池包的刚度和模态为约束条件的优化数学模型,对电池包上盖进行形貌优化。根据优化结果对电池包进行结构改进,改进后的电池包强度、刚度均大幅提高,低阶频率提高,避开了激振频率,电池包结构更加合理,证明了优化的可行性。同时电池包箱体质量减轻了8.67%,达到了轻量化的目的。In order to achieve the lightness of the battery pack and avoid the frequency resonance problem of the battery pack in use, the structural strength analysis and modal response analysis of the three typical working conditions of the battery pack were carried out, and the variable density method was adopted to establish the optimization objective of the minimum flexibility of the battery pack, and the displacement of the cell node was the design variable. The upper cover of the battery pack was optimized by optimizing the mathematical model with the constraints of stiffness and modal. According to the optimization results, the structure of the battery pack is improved, the strength and stiffness of the improved battery pack are greatly improved, the low order frequency is improved, and the excitation frequency is avoided. The structure of the battery pack is more reasonable, which proves the feasibility of the optimization. At the same time, the weight of the whole package is reduced by 8.67%, achieving the purpose of lightweight.

关 键 词：动力电池包 有限元分析 轻量化设计 

分 类 号：TP391.7[自动化与计算机技术—计算机应用技术] U469.72[自动化与计算机技术—计算机科学与技术]