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Volume 15
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10.3390/en15228458
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Article

State-Partial Accurate Voltage Fault Prognosis for Lithium-Ion Batteries Based on Self-Attention Networks

by
Huaqin Zhang
1,2,3,
Jichao Hong
1,2,3,*,
Zhezhe Wang
2,3 and
Guodong Wu
1
1
Key Laboratory of Conveyance Equipment, Ministry of Education, East China Jiaotong University, Nanchang 330013, China
2
School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China
3
Shunde Innovation School, University of Science and Technology Beijing, Foshan 528000, China
*
Author to whom correspondence should be addressed.
Energies 2022, 15(22), 8458; https://doi.org/10.3390/en15228458
Submission received: 1 October 2022 / Revised: 5 November 2022 / Accepted: 9 November 2022 / Published: 12 November 2022
(This article belongs to the Topic Battery Design and Management)
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Abstract

Multiple faults in new energy vehicle batteries can be diagnosed using voltage. To find voltage fault information in advance and reduce battery safety risk, a state-partitioned voltage fault prognosis method based on the self-attention network is proposed. The voltage data are divided into three parts with typical characteristics according to the charging voltage curve trends under different charge states. Subsequently, a voltage prediction model based on the self-attention network is trained separately with each part of the data. The voltage fault prognosis is realized using the threshold method. The effectiveness of the method is verified using real operating data of electric vehicles (EVs). The effects of different batch sizes and window sizes on model training are analyzed, and the optimized hyperparameters are used to train the voltage prediction model. The average error of predicted voltage is less than 2 mV. Finally, the superiority and robustness of the method are verified.
Keywords: electric vehicles; battery systems; self-attention mechanism; voltage prediction; fault prognosis electric vehicles; battery systems; self-attention mechanism; voltage prediction; fault prognosis

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MDPI and ACS Style

Zhang, H.; Hong, J.; Wang, Z.; Wu, G. State-Partial Accurate Voltage Fault Prognosis for Lithium-Ion Batteries Based on Self-Attention Networks. Energies 2022, 15, 8458. https://doi.org/10.3390/en15228458

AMA Style

Zhang H, Hong J, Wang Z, Wu G. State-Partial Accurate Voltage Fault Prognosis for Lithium-Ion Batteries Based on Self-Attention Networks. Energies. 2022; 15(22):8458. https://doi.org/10.3390/en15228458

Chicago/Turabian Style

Zhang, Huaqin, Jichao Hong, Zhezhe Wang, and Guodong Wu. 2022. "State-Partial Accurate Voltage Fault Prognosis for Lithium-Ion Batteries Based on Self-Attention Networks" Energies 15, no. 22: 8458. https://doi.org/10.3390/en15228458

APA Style

Zhang, H., Hong, J., Wang, Z., & Wu, G. (2022). State-Partial Accurate Voltage Fault Prognosis for Lithium-Ion Batteries Based on Self-Attention Networks. Energies, 15(22), 8458. https://doi.org/10.3390/en15228458

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