汽车工程 ›› 2021, Vol. 43 ›› Issue (9): 1285-1290.doi: 10.19562/j.chinasae.qcgc.2021.09.003

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基于表面温度和增量容量的锂电池健康状态估计

林名强1,2(),吴登高1,2,郑耿峰3,武骥4,5   

  1. 1.福州大学电气工程与自动化学院,福州 350108
    2.中国科学院海西研究院泉州装备制造研究所,晋江 362216
    3.福建省特种设备检验研究院,福州 350008
    4.合肥工业大学汽车与交通工程学院,合肥 230009
    5.安徽省智能汽车工程实验室,合肥 230009
  • 收稿日期:2021-05-18 修回日期:2021-06-30 出版日期:2021-09-25 发布日期:2021-09-26
  • 通讯作者: 林名强 E-mail:kdlmq@fjirsm.ac.cn
  • 基金资助:
    国家自然科学基金(61903114);工信部智能制造综合标准化项目(GXSP20181001);泉州市科技计划项目(2020C010R)

Estimation Method of State of Health of Lithium Battery Based on Surface Temperature and Incremental Capacity

Mingqiang Lin1,2(),Denggao Wu1,2,Gengfeng Zheng3,Ji Wu4,5   

  1. 1.Collage of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350108
    2.Quanzhou Equipment Manufacturing Research Institute,Haixi Research Institute,Chinese Academy of Sciences,Jinjiang 362216
    3.Fujian Special Equipment Inspection and Research Institute,Fuzhou 350008
    4.Department of Vehicle Engineering,Hefei University of Technology,Hefei 230009
    5.Anhui Intelligent Vehicle Engineering Laboratory,Hefei 230009
  • Received:2021-05-18 Revised:2021-06-30 Online:2021-09-25 Published:2021-09-26
  • Contact: Mingqiang Lin E-mail:kdlmq@fjirsm.ac.cn

摘要:

本文中提出了一种基于电池表面温度和增量容量的健康状态(SOH)估计方法,分析了恒流充电过程中的温度变化曲线,从温度变化曲线中提取了3个几何特征作为健康因子,并与增量容量曲线的峰值结合作为反向传播神经网络的输入来建立模型估算SOH。试验结果验证了该方法的有效性,SOH平均估计误差仅在2%以下。

关键词: 锂离子电池, 健康状态, DT曲线, 神经网络

Abstract:

In this paper, a state of health (SOH) estimation method based on the surface temperature and incremental capacity of battery is proposed. The differential temperature curves during constant charging are analyzed, from which three geometric features are extracted as health factors, and combined with the peak value of incremental capacity curve as the input of BP neural network to establish a model for SOH estimation. The results of the test verify the effectiveness of the method, and the average error of SOH estimation is less than 2%.

Key words: lithium?ion battery, state of health, differential temperature curse, neural network