主办：陕西省汽车工程学会
ISSN 1671-7988  CN 61-1394/TH
创刊：1976年
汽车实用技术

汽车实用技术 ›› 2024, Vol. 49 ›› Issue (9): 1-5.DOI: 10.16638/j.cnki.1671-7988.2024.009.001

• 新能源汽车 •    

电芯膨胀力叠加关系研究

程 强，韦助荣，吴 宝，李茂文   

  1. 合肥国轩高科动力能源有限公司
  • 发布日期:2024-05-11
  • 通讯作者: 程 强
  • 作者简介:程强（1991－），男，硕士，工程师，研究方向为动力电池包性能开发，E-mail:chengqiang@gotion.com.cn。
  • 基金资助:
    国家重点研发计划项目（2021YFB2012504）。

Research on the Superposition Relationship of Cell Expansion Force

CHENG Qiang, WEI Zhurong, WU Bao, LI Maowen   

  1. Hefei Gotion High-tech Power Energy Company Limited
  • Published:2024-05-11
  • Contact: CHENG Qiang

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摘要： 随着新能源行业的兴起，高比能、低成本、高成组效率的模组设计已成为主流趋势。 然而锂离子电池在充放电过程中会发生鼓胀，导致电芯循环寿命降低。且电芯到模组级别膨 胀力呈增大趋势，过大的膨胀力会使模组端侧板发生破坏。文章基于电芯膨胀力叠加关系的 研究，分别对单体电芯、2P1S、1P2S、3P1S、1P3S、4P1S、1P4S 以及 3P4S 模组进行了测试， 得出电芯串并联方式对模组膨胀力大小的影响可以忽略不计，且模组膨胀力的大小与电芯的 个数呈对数函数的关系。通过预测不同成组方式模组膨胀力的大小，为安全模组设计提供指 导意义。

关键词: 新能源；模组；膨胀力；叠加关系

Abstract: With the rise of the new energy industry, module design with high specific energy, low cost, and high assembly efficiency has become the mainstream trend. However, lithium-ion batteries may experience bulging during the charging and discharging process, which can lead to a decrease in the cycling life of the cells. Moreover, the expansion force from the cell to the module level is increasing, and excessive expansion force can cause damage to the module end and side plates. This article is based on the study of the superposition relationship of the expansion force of the cells, tested single cell, 2P1S, 1P2S, 3P1S, 1P3S, 4P1S, 1P4S, and 3P4S modules, the influence of the series and parallel connection of cells on the expansion force of the module can be ignored. And the expansion force of the module is a logarithmic function of the number of cells. Provide guidance for the design of safety modules by predicting the expansion force of modules in different grouping methods.

Key words: New energy; Module; Expansion force; Superposition relationship