储能科学与技术 ›› 2021, Vol. 10 ›› Issue (2): 671-678.doi: 10.19799/j.cnki.2095-4239.2020.0346

• 储能测试与评价 • 上一篇    下一篇

电动汽车用动力电池系统循环寿命试验

樊彬1(), 姜成龙1(), 林春景1, 李玉鹏1, 余八一2, 张晋杰1, 张良1, 高孟洋1, 王伟1, 解坤1, 常宏1   

  1. 1.中国汽车技术研究中心有限公司,天津 300300
    2.中国质量认证中心,北京 100070
  • 收稿日期:2020-10-20 修回日期:2020-11-23 出版日期:2021-03-05 发布日期:2021-03-05
  • 作者简介:樊彬(1986—),男,高级工程师,研究方向为锂离子电池测试评价技术,E-mail:fanbin@catarc.ac.cn|姜成龙,工程师,主要从事动力电池测评技术研究,E-mail:jiangchenglong@catarc.ac.cn
  • 基金资助:
    国家重点研发计划(2018YFB0104100)

Experimental study on the cycle life of electric vehicle battery systems

Bin FAN1(), Chenglong JIANG1(), Chunjing LIN1, Yupeng LI1, Bayi YU2, Jinjie ZHANG1, Liang ZHANG1, Mengyang GAO1, Wei WANG1, Kun XIE1, Hong CHANG1   

  1. 1.China Automotive Technology and Research Center Co. , Ltd. , Tianjin 300300, China
    2.China Quality Certification Centre, Beijing 100070, China
  • Received:2020-10-20 Revised:2020-11-23 Online:2021-03-05 Published:2021-03-05

摘要:

本文以三元体系电池单体及系统为研究对象,研究了单体电池内阻、压差等因素对电池系统循环寿命变化规律的影响;确定了电池系统循环寿命的拟合公式,该三元体系动力电池系统在循环过程中放电容量遵循幂函数衰减变化规律,为预测和评估动力电池系统的实际使用寿命提供依据。同时分析了动力电池单体在不同温度及不同充放电深度下的容量变化规律。

关键词: 动力电池系统, 循环寿命, 内阻, 单体压差, 寿命拟合, 一致性

Abstract:

In this work, the factors that influence the cycle life of battery systems, such as the internal resistance, temperature, and the voltage difference between the cells, were systematically studied. We determined a fitting equation for the cycle life of battery systems and found that their discharge capacity showed an exponential decay. This characteristic can serve as a basis to predict and estimate the actual service life of battery systems. We also studied the capacity variation of battery cells for different discharge depths at different temperatures.

Key words: battery cells and systems, cycle life, internal resistance, cell voltage difference, life fit consistency

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