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Lithium-ion battery state of health prognostication employing multi-model fusion approach based on image coding of charging voltage and temperature data

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  • Zhang, Wencan
  • He, Hancheng
  • Li, Taotao
  • Yuan, Jiangfeng
  • Xie, Yi
  • Long, Zhuoru

Abstract

The employment of readily obtainable parameters, including voltage and temperature, derived from the battery management system facilitates the real-time evaluation of lithium-ion batteries health status. However, the complex aging mechanisms and noise interference inherent in lithium-ion batteries present substantial challenges to accurate estimation. Hence, this research proposes a multi-model fusion approach utilizing Gramian Angular Field encoding to accurately predict the health status of lithium-ion batteries. Battery voltage and temperature data are acquired through system aging experiments. The Gramian Angular Field-based image encoding transforms these data into images, accentuating the subtle characteristics of the data and thereby enhancing its recognizability by neural networks. Subsequently, two-dimensional Convolutional Neural Networks are employed to extract features from the images, followed by one-dimensional Convolutional Neural Networks to reduce the dimensions of the feature matrix. The battery health status is then predicted utilizing Long Short-term Memory Networks. The culmination is the evaluation of the model performance through the application of quantitative error metrics. The study results show that the method can pinpoint the prediction error to within 2%, significantly improving accuracy over traditional prediction methods. It proves the great potential of direct data, such as voltage and temperature, in predicting battery health.

Suggested Citation

  • Zhang, Wencan & He, Hancheng & Li, Taotao & Yuan, Jiangfeng & Xie, Yi & Long, Zhuoru, 2024. "Lithium-ion battery state of health prognostication employing multi-model fusion approach based on image coding of charging voltage and temperature data," Energy, Elsevier, vol. 296(C).
    • Handle: RePEc:eee:energy:v:296:y:2024:i:c:s0360544224008673
    DOI: 10.1016/j.energy.2024.131095
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    References listed on IDEAS

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    1. Zhang, Jiarui & Mao, Lei & Liu, Zhongyong & Yu, Kun & Hu, Zhiyong, 2025. "A Bayesian transfer learning framework for assessing health status of Lithium-ion batteries considering individual battery operating states," Applied Energy, Elsevier, vol. 382(C).
    2. Bing Chen & Yongjun Zhang & Jinsong Wu & Hongyuan Yuan & Fang Guo, 2025. "Lithium-Ion Battery State of Health Estimation Based on Feature Reconstruction and Transformer-GRU Parallel Architecture," Energies, MDPI, vol. 18(5), pages 1-19, March.

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