Journal of Hebei University of Water Resources and Electric Engineering

Journal of Hebei University of Water Resources and Electric Engineering ›› 2025, Vol. 35 ›› Issue (2): 67-75.DOI: 10.16046/j.cnki.issn2096-5680.2025.02.012

• New Energy Engineering • Previous Articles     Next Articles

Finite Element Analysis and Structural Optimization of Power Battery Box for New Energy Electric Vehicle

LI Wenbin1,2, ZHANG Wanming1,2, ZHANG Zhen1,2, ZHANG Pengcheng1,2, ZHANG Shuai1   

  1. 1. Department of Mechanical Engineering, Hebei University of Water Resources and Electric Engineering, 061001, Cangzhou, Hebei, China;
    2. Industrial Manipulator Control and Reliability Technology Innovation Center of Hebei, 061001, Cangzhou, Hebei, China
  • Received:2024-05-23 Revised:2024-08-26 Online:2025-06-30 Published:2025-07-04

新能源电动汽车动力电池箱有限元分析及结构优化

李文斌1,2, 张万明1,2, 张振1,2, 张鹏程1,2, 张帅1   

  1. 1.河北水利电力学院机械工程系,河北省沧州市黄河西路49号 061001;
    2.河北省工业机械手控制与可靠性技术创新中心,河北省沧州市黄河西路49号 061001
  • 作者简介:李文斌(1990-),男,河北沧州人,讲师,主要研究方向:机械创新设计与轻量化研究。E-mail:277973944@qq.com
  • 基金资助:
    沧州市科技计划自筹经费项目(213101001);河北水利电力学院基本科研业务费研究项目(SYKY2316)

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Abstract: To predict the static and dynamic characteristics of the power battery box under typical working conditions and reduce the actual test times and costs, the strength and modal analysis of a certain type of electric vehicle power battery box is carried out to reduce the weight and improve the low-order mode. Based on the Cell To Pack (CTP) design methodology, this research accomplished the conceptual design of CTP type large module box scheme. The finite element analysis method and technology are used to analyze the load bearing and static and dynamic characteristics of the battery box under the actual working conditions, and then the wall thickness of the five regions of the battery box has been optimized.. The optimized box structure meets the safety requirements of mechanical strength and stiffness under collision extrusion andsudden braking impact conditions, reduces the weight of the box structure by 17 %, and increases the first-order mode by 14 %. The optimized power battery box still meets the safety requirements under typical working conditions under the condition of mass reduction, improves the low-order mode, and effectively avoids the excitation area.

Key words: power battery box, finite element, static and dynamic characteristics, lightweigh

摘要： 为预测动力电池箱典型工况下的静动态特性,减少实际测试次数和成本,对某型电动汽车动力电池箱进行强度和模态分析,减重的同时提升低阶模态;研究依据Cell To Pack设计方法,完成CTP式大模组箱体方案设计。应用有限元分析方法及技术,分析电池箱实际工况下的承载及静动态特性表现,进而从壁厚对电池箱体五区域进行优化;优化后的箱体结构满足碰撞挤压和急刹冲击工况下机械强度、刚度的安全性要求,减轻箱体结构重量17%,一阶模态提升14%;优化后的动力电池箱在减重的情况下,仍满足典型工况下的安全性要求,提升了低阶模态,有效避开激振区域。

关键词: 动力电池箱, 有限元, 静动态特性, 轻量化

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