A health indicator extraction and optimization framework for lithium-ion battery degradation modeling and prognostics

Datong Liu, Jianbao Zhou, Haitao Liao, Yu Peng, Xiyuan Peng

Research output: Contribution to journalArticlepeer-review

235 Scopus citations


Maximum releasable capacity and internal resistance are often used as the health indicators (HIs) of a lithium-ion battery for degradation modeling and estimation of remaining useful life (RUL). However, the maximum releasable capacity is usually difficult to estimate in online applications due to complex operating conditions in the field. Moreover, measuring the internal resistance is too expensive to be implemented on-line. In this paper, an HI extraction and optimization framework requiring only the operating parameters of lithium-ion batteries is proposed for battery degradation modeling and RUL estimation. The framework carries out raw HI extraction, transformation, correlation analysis, and verification and evaluation to achieve HI enhancement. In particular, the Box-Cox transformation is adopted to improve the correlation between the extracted HI and the battery's actual degradation state. To estimate the battery's RUL using the enhanced HI, an optimized relevance vector-machine algorithm is utilized, which can be performed in a flexible and agile way. Experimental studies using two different industrial testing data sets illustrate the high efficiency and adaptability of the proposed framework in lithium-ion battery degradation modeling and RUL estimation.

Original languageEnglish (US)
Article number7018028
Pages (from-to)915-928
Number of pages14
JournalIEEE Transactions on Systems, Man, and Cybernetics: Systems
Issue number6
StatePublished - Jun 1 2015


  • Box-Cox transformation
  • correlation analysis
  • health indicator (HI)
  • lithium-ion battery
  • prognostics and health management (PHM)
  • remaining useful life (RUL)

ASJC Scopus subject areas

  • Software
  • Control and Systems Engineering
  • Human-Computer Interaction
  • Computer Science Applications
  • Electrical and Electronic Engineering


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