Time-domain parameter extraction method for Thévenin-equivalent circuit battery models

A. Hentunen, Teemu Lehmuspelto, Jussi Suomela

Research output: Contribution to journalArticleScientificpeer-review

Abstract

This paper presents an analytical time-domain-based parameter identification method for Thévenin-equivalent circuit-based lithium-ion battery models. The method is based on the analysis of voltage-relaxation characteristics of pulse discharge and pulse charge experiments, and the method can be used for both discharge and charge operation with any number of parallel resistor-capacitor branches. The use of the method is demonstrated for a second-order model and validated with a real-world duty cycle. Experimental results for a commercial lithium-ion battery module are presented.
Original languageEnglish
Pages (from-to)558-566
JournalIEEE Transactions on Energy Conversion
Volume29
Issue number3
DOIs
Publication statusPublished - 2014
MoE publication typeA1 Journal article-refereed

Keywords

  • Batteries
  • battery management systems (BMSs)
  • electric vehicles (EVs)
  • equivalent circuits
  • parameter extraction

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