Data-driven battery health prognosis with partial-discharge information

Chunyang Zhao*, Peter Bach Andersen, Chresten Træholt, Seyedmostafa Hashemi

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

The unpredictability of battery degradation behavior is a challenging issue impeding the development of battery applications, due to the complexity of the degradation and the limitation of state measurement methods. Nowadays, with accessible battery aging datasets and machine learning algorithms, there are opportunities for data-driven battery health prognosis. However, most of the previous work is restricted in the scope of full-discharge capacity records extrapolation, which has insufficient prospects in real-life applications. In this work, we propose using partial discharge information for degradation estimation and prediction. Our Gaussian process regression model achieves good performance by limited partial discharge information without requirements of feature selection. The accurate battery health prognosis in 300 cycles can be carried out by one partial-discharge cycle at any degradation stage. The capacity estimation gives around 1 % root mean square error (RMSE) when using 30 % information on the discharge process. As full-cycle discharge is not required, the proposed model can diagnose the battery state of health (SOH) with a limited portion of battery operation information extracted during the discharge process and reduce the effort of capacity tests. Further development of this method brings opportunities for battery state evaluation and prediction in real applications with better applicability and accuracy.
Original languageEnglish
Article number107151
JournalJournal of Energy Storage
Volume65
Number of pages12
ISSN2352-152X
DOIs
Publication statusPublished - 2023

Keywords

  • Battery degradation
  • Partial Discharge
  • Data-driven model
  • State of health
  • Gaussian process regression

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