Health Prediction for Lithium-Ion Batteries Under Unseen Working Conditions

Yunhong Che, Florent Forest, Yusheng Zheng, Le Xu, Remus Teodorescu

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Battery health prediction is significant while challenging for intelligent battery management. This article proposes a general framework for both short-term and long-term predictions of battery health under unseen dynamic loading and temperature conditions using domain-adaptive multitask learning (MTL) with long-term regularization. First, features extracted from partial charging curves are utilized for short-term state of health predictions. Then, the long-term degradation trajectory is directly predicted by recursively using the predicted features within the multitask framework, enhancing the model integrity and lowering the complexity. Then, domain adaptation (DA) is adopted to reduce the discrepancies between different working conditions. Additionally, a long-term regularization is introduced to address the shortcoming that arises when the model is extrapolated recursively for future health predictions. Thus, the short-term prediction ability is maintained while the long-term prediction performance is enhanced. Finally, predictions are validated through aging experiments under various dynamic loading profiles. By using partial charging capacity–voltage data, the results show that the early-stage long-term predictions are accurate and stable under various working profiles, with root mean square errors below 2% and fitting coefficients surpassing 0.86.
Original languageEnglish
Article number10500447
JournalIEEE Transactions on Industrial Electronics
VolumePP
Issue number99
Pages (from-to)1-11
Number of pages11
ISSN1557-9948
DOIs
Publication statusPublished - 2024

Keywords

  • Aging
  • Batteries
  • Degradation
  • Feature extraction
  • Loading
  • Predictive models
  • Testing
  • health and trajectory prediction
  • multi-task learning
  • transfer learning
  • Battery
  • domain adaptation (DA)

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