电气工程学报 ›› 2022, Vol. 17 ›› Issue (2): 38-48.doi: 10.11985/2022.02.005

• 特邀专栏:电气化交通中的电能变换与利用新技术 • 上一篇    下一篇

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循环使用与储存条件对石墨/LiCoO2电池寿命的影响分析*

张博钊(), 苟斌(), 徐燕璋()   

  1. 西南交通大学电气工程学院 成都 610031
  • 收稿日期:2022-02-28 修回日期:2022-05-20 出版日期:2022-06-25 发布日期:2022-08-08
  • 通讯作者: 苟斌 E-mail:a229139742@163.com;bingo57350@126.com;a17731391685@163.com
  • 作者简介:张博钊,男,1996年生,硕士研究生。主要研究方向为储能系统能量与健康管理技术。E-mail: a229139742@163.com
    徐燕璋,男,1998年生,硕士研究生。主要研究方向为储能系统能量与健康管理技术。E-mail: a17731391685@163.com
  • 基金资助:
    *中央高校基本科研业务费专项资金资助项目(2682021CX035)

Effect Analysis of Recycling and Storage Conditions on Graphite/LiCoO2 Battery Life

ZHANG Bozhao(), GOU Bin(), XU Yanzhang()   

  1. School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031
  • Received:2022-02-28 Revised:2022-05-20 Online:2022-06-25 Published:2022-08-08
  • Contact: GOU Bin E-mail:a229139742@163.com;bingo57350@126.com;a17731391685@163.com

摘要:

锂离子电池被广泛应用于能量储存,电池老化的影响在整个使用寿命中限制了其性能。一方面通过分析石墨/LiCoO2电池在不同荷电状态(State of charge, SOC)范围采取循环试验的数据,量化了平均SOC和SOC的变化(∆SOC)对锂离子电池可用容量衰减的影响,并建立循环老化模型;另一方面,通过分析石墨/LiCoO2电池不同SOC储存状态和不同储存温度寿命试验数据,揭示了储存条件变化对锂电池健康状态衰退过程的影响规律,并建立日历老化模型。分析结果可以应用于电池实际循环使用和静置储存优化设置。

关键词: 锂离子电池, 荷电状态, 循环老化, 日历老化

Abstract:

Lithium-ion batteries are used for energy storage in a wide array of applications, and the effects of battery ageing limit their performance and occur throughout their whole life. On the one hand, the influence of the average SOC and SOC changes(∆SOC) on the available capacity decay of lithium-ion batteries is quantified by analyzing the data of the graphite/LiCoO2 batteries in different state of charge(SOC) ranges, and a cycle aging model is established. On the other hand, by analyzing the test data of different SOC storage states and different storage temperature life of graphite/LiCoO2 batteries, the influence of storage condition changes on the decay process of lithium battery state of health is revealed, and a calendar aging model is established. The analysis results can be applied to the actual battery cycle use and static storage optimization settings.

Key words: Lithium-ion battery(LIB), state of charge(SOC), cycle aging, calendar aging

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