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State of energy estimation of lithium-ion battery based on long short-term memory optimization Adaptive Cubature Kalman filter

Author

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  • Enguang Hou
  • Heyan Song
  • Zhen Wang
  • Jingshu Zhu
  • Jiarui Tang
  • Gang Shen
  • Jiangang Wang

Abstract

State of energy (SOE) is an important parameter to ensure the safety and reliability of lithium-ion battery (LIB) system. The safety of LIBs, the development of artificial intelligence, and the increase in computing power have provided possibilities for big data computing. This article studies SOE estimation problem of LIBs, aiming to improve the accuracy and adaptability of the estimation. Firstly, in the SOE estimation process, adaptive correction is performed by iteratively updating the observation noise equation and process noise equation of the Adaptive Cubature Kalman Filter (ACKF) to enhance the adaptive capability. Meanwhile, the adoption of high-order equivalent models further improves the accuracy and adaptive ability of SOE estimation. Secondly, Long Short-term Memory (LSTM) is introduced to optimize Ohmic internal resistance (OIR) and actual energy (AE), further improving the accuracy of SOE estimation. Once again, in the process of OIR and AE estimation, the iterative updating of the observation noise equation and process noise equation of ACKF were also adopted to perform adaptive correction and enhance the adaptive ability. Finally, this article establishes a SOE estimation method based on LSTM optimized ACKF. Validate the LSTM optimized ACKF method through simulation experiments and compare it with individual ACKF methods. The results show that the ACKF estimation method based on LSTM optimization has an SOE estimation error of less than 0.90% for LIB, regardless of the SOE at 100%, 65%, and 30%, which is more accurate than the SOE estimation error of ACKF alone. It can be seen that this study has improved the accuracy and adaptability of LIB’s SOE estimation, providing more accurate data support for ensuring the safety and reliability of lithium batteries.

Suggested Citation

  • Enguang Hou & Heyan Song & Zhen Wang & Jingshu Zhu & Jiarui Tang & Gang Shen & Jiangang Wang, 2024. "State of energy estimation of lithium-ion battery based on long short-term memory optimization Adaptive Cubature Kalman filter," PLOS ONE, Public Library of Science, vol. 19(7), pages 1-19, July.
    • Handle: RePEc:plo:pone00:0306165
    DOI: 10.1371/journal.pone.0306165
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    References listed on IDEAS

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    1. Tian, Yong & Huang, Zhijia & Tian, Jindong & Li, Xiaoyu, 2022. "State of charge estimation of lithium-ion batteries based on cubature Kalman filters with different matrix decomposition strategies," Energy, Elsevier, vol. 238(PC).
    2. Ma, Wentao & Guo, Peng & Wang, Xiaofei & Zhang, Zhiyu & Peng, Siyuan & Chen, Badong, 2022. "Robust state of charge estimation for Li-ion batteries based on cubature kalman filter with generalized maximum correntropy criterion," Energy, Elsevier, vol. 260(C).
    3. Xin Qiao & Zhixue Wang & Enguang Hou & Guangmin Liu & Yinghao Cai, 2022. "Online Estimation of Open Circuit Voltage Based on Extended Kalman Filter with Self-Evaluation Criterion," Energies, MDPI, vol. 15(12), pages 1-22, June.
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