Extracting equivalent circuit parameters of lead-acid cells from sparse impedance measurements

Sudarshan Rao Nelatury, Pritpal Singh

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


A method for extracting the equivalent circuit parameters of a lead-acid battery from sparse (only three) impedance spectroscopy observations at three different frequencies is outlined. The method is ideal for finding the parameters in an equivalent circuit consisting of bulk resistance, a reaction resistance and a constant phase element (CPE). Electrochemical impedance spectroscopy (EIS) measurements were made on spirally wound 2.5 Ah lead-acid cells. The equivalent circuit parameters found using our method closely compare with those extracted from the EIS measurements. The complete EIS spectrum calculated using the estimated circuit parameters at all other frequencies also closely matched the actual measurements.

Original languageEnglish (US)
Pages (from-to)621-625
Number of pages5
JournalJournal of Power Sources
Issue number2
StatePublished - Nov 14 2002

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering


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