Enhanced Wavelet Transform Dynamic Attention Transformer Model for Recycled Lithium-Ion Battery Anomaly Detection

Xin Liu (), Haihong Huang, Wenjing Chang, Yongqi Cao and Yuhang Wang
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Xin Liu: School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China
Haihong Huang: School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China
Wenjing Chang: State Grid Anhui Ultra High Voltage Company, No. 397, Tongcheng South Road, Baohe District, Hefei 230000, China
Yongqi Cao: School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China
Yuhang Wang: School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China

Energies, 2024, vol. 17, issue 20, 1-15

Abstract: Rapid advancements in electric vehicle (EV) technology have highlighted the importance of lithium-ion (Li) batteries. These batteries are essential for safety and reliability. Battery data show non-stationarity and complex dynamics, presenting challenges for current monitoring and prediction methods. These methods often fail to manage the variability seen in real-world environments. To address these challenges, we propose a Transformer model with a wavelet transform dynamic attention mechanism (WADT). The dynamic attention mechanism uses wavelet transform. It focuses adaptively on the most informative parts of the battery data to enhance the anomaly detection accuracy. We also developed a deep learning model with an improved Transformer architecture. This architecture is tailored for the complex dynamics of battery data time series. The model accounts for temporal dependencies and adapts to non-stationary behavior. Experiments on public battery datasets show our approach’s effectiveness. Our model significantly outperforms existing technologies with an accuracy of 0.89 and an AUC score of 0.88. These results validate our method’s innovation and effectiveness.

Keywords: Transformer; electric vehicle technology; lithium-ion batteries; wavelet transform; non-stationarity; complex dynamics (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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