• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2018, Vol. 54 ›› Issue (8): 157-164.doi: 10.3901/JME.2018.08.157

• 运载工程 • 上一篇    下一篇

车用电池包结构动力学建模及分析方法研究

兰凤崇1,2, 黄培鑫1,2, 陈吉清1,2, 刘金1,2   

  1. 1. 华南理工大学机械与汽车工程学院 广州 510640;
    2. 广东省汽车工程重点实验室 广州 510640
  • 收稿日期:2017-07-25 修回日期:2018-02-01 出版日期:2018-04-20 发布日期:2018-04-20
  • 通讯作者: 陈吉清(通信作者),女,1966年出生,博士,教授,博士研究生导师。主要研究方向为车身结构优化及汽车环境适应性。E-mail:chjq@scut.edu.cn
  • 作者简介:兰凤崇,男,1959年出生,博士,教授博士研究生导师。主要研究方向为汽车结构与安全及汽车环境适应性。E-mail:fclan@scut.edu.cn;黄培鑫,男,1991年出生。主要研究方向为电池包复杂安全理论及结构安全设计。E-mail:15913174264@163.com;刘金,男,1991年出生。主要研究方向为电池包复杂安全理论及结构安全设计。E-mail:2292765570@qq.com
  • 基金资助:
    广东省科技计划(2014B010106002,2015B010137002,2016A050503021,2016B090918089)和NAIS (2017X-0028)资助项目。

Study on the Method of Structural Dynamic Modeling and Analyzing of the EV's Battery Pack

LAN Fengchong1,2, HUANG Peixin1,2, CHEN Jiqing1,2, LIU Jin1,2   

  1. 1. School of Mechanical & Automotive Engineering, South China University of Technology, Guangzhou 510640;
    2. Guangdong Provincial Key Laboratory of Automotive, Guangzhou 510640
  • Received:2017-07-25 Revised:2018-02-01 Online:2018-04-20 Published:2018-04-20

摘要: 汽车动力电池包多由单体电池、模组、壳体、电器联接部件及管理系统装配成整体,在变温、振动环境下完成充放电功能。其性能的可靠和安全直接决定了电动汽车的正常运行。研究复杂电池包结构的动力学建模和分析,探索其内部精细结构以及整体电池包的动力学响应,是车用电池包开发和结构、性能优化的迫切需要。提出了基于单体等效力学参数和实际接触连接条件的复杂电池包系统建模和动力学分析方法,结合电池包开发实例,建立各部分子模型并进行试验验证,通过优化算法确定最佳接触参数;对比集中质量模型、简化连接模型、接触模型的模态仿真结果,验证所建模型的有效性和精度,说明建模方法的可行性;获得了实例电池包内部关键电接触点在随机振动下的响应,发现同一振动工况下不同位置触点的加速度响应差异很大,呈现很强的不均匀性。给出了螺栓连接的电池包装配体动力学精细化建模方法和分析思路,对同类型电池包结构设计、安全性分析有实际意义。

关键词: 车用电池包, 单体建模, 动力学分析, 接触模态

Abstract: The EV's battery packs whose reliability and security performance directly determine the EV's normal operation mostly assembled into integration by battery cells, modules, shell, electrical connection components and management system, completing the charge and discharge function under the vibration and varying temperature environment. It's an urgent need to study on dynamic modeling and analyze of complicated battery packs and explore the dynamic response of internal fine structure and the whole integration during the developing and optimizing procedure of battery packs. The method of complicated battery packs systemic dynamic modeling and analyzing based on the cell's equivalent mechanical parameters and actual contact conditions is proposed. Combined with the development of a battery pack instance, each sub-model is established and under experimental verification. The optimum contact parameters are determined by optimization algorithm. The simulation results of mass-concentrated model, connection-simplified model and contact-considered model are compared to experimental result to verify the validity and accuracy of the model and the feasibility of the method. The random vibration responses of instance's internal key electrical contact points are achieved and show that different positions have big difference under a same vibration excitation and the responses are highly non-uniform distribution. The method of dynamic modeling and analyzing of bolt-connected battery pack is proposed and has practical significance to the design and safety analysis of the same type battery packs.

Key words: cell modeling, contact modal, dynamic analysis, EV's battery pack

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