Impedance-based and circuit-parameter-based battery models for HEV power systems

J. H. Jang, J. Y. Yoo

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


The relationship between voltage and current inside a battery, or the impedance, plays an important role in the simulation and design of hybrid electric vehicle (HEV) power systems. This paper proposes a new approach employing the Bode plot for evaluation of equivalent circuit parameters for a lithium polymer battery (LiPB) for HEV application. The main concept of the proposed circuit-parameter-based model approach is the application of a transfer function used to process the frequency response of the battery for calculation of accurate circuit parameters. Additionally, the Bode plot is also applied to derive the impedance-based model directly from frequency response measurements for short time simulations and practical use in the HEV. Two methods for battery modeling are proposed and verified experimentally with the voltage-current profile of a conventional HEV using the battery measured in this paper. The results show that the proposed circuit-parameter-based technique provides a satisfactory battery equivalent circuit model.

Original languageEnglish
Pages (from-to)615-623
Number of pages9
JournalInternational Journal of Automotive Technology
Issue number5
Publication statusPublished - 2008 Oct

Bibliographical note

Funding Information:
ACKNOWLEDGEMENT−This work has been supported by the Ministry of Commerce, Industry and Energy of Republic of Korea.

Copyright 2008 Elsevier B.V., All rights reserved.


  • Battery modeling
  • Circuit parameter
  • Electrical equivalent circuit
  • HEV
  • Impedance
  • LiPB

ASJC Scopus subject areas

  • Automotive Engineering


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