Fault Diagnosis of Lithium-Ion Batteries Based on the Historical Trajectory of Remaining Discharge Capacity

被引:0
|
作者
Jiang, Jiuchun [1 ]
Qu, Bingrui [2 ]
Liu, Shuaibang [1 ]
Yan, Huan [2 ]
Zhang, Zhen [2 ]
Chang, Chun [2 ]
机构
[1] Beijing Inst Technol, Shenzhen Automot Res Inst, Shenzhen 518118, Peoples R China
[2] Hubei Univ Technol, Hubei Key Lab High Efficiency Utilizat Solar Energ, Wuhan 430000, Peoples R China
来源
APPLIED SCIENCES-BASEL | 2024年 / 14卷 / 23期
关键词
lithium-ion battery; fault diagnosis; medium and long time scale; historical trajectory;
D O I
10.3390/app142310895
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
In recent years, the number of safety accidents in new-energy electric vehicles due to lithium-ion battery failures has been increasing, and the lithium-ion battery fault diagnosis technology is particularly important to ensure the safe operation of electric vehicles. This paper proposes a method for lithium-ion battery fault diagnosis based on the historical trajectory of lithium-ion battery remaining discharge capacity in medium and long time scales. The method first utilizes the sparrow search algorithm (SSA) to identify the parameters of the second-order equivalent circuit model of the lithium-ion battery, and then estimates the state of charge (SOC) of the lithium-ion battery using the extended Kalman filter (EKF). The remaining discharge capacity is estimated according to the SOC, and finally the feature vectors are used to diagnose the faults using box plots on the medium and long time scales. Experimental results verify that the root mean squared error (RSME) and mean absolute error (MAE) of the proposed SOC estimation method are 0.0049 and 0.0034, respectively. This method can accurately identify the faulty single cell in a battery pack with low-capacity single cells and promptly detect any abnormalities in the single cell when a micro-short circuit fault occurs.
引用
收藏
页数:13
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