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https://www.ias.ac.in/article/fulltext/jcsc/115/05-06/0465-0472

Impedance spectroscopy; sealed lead-acid batteries; state-of-health; state-of-charge; internal resistance.

A reliable diagnostics of lead-acid batteries would become mandatory with the induction of an improved power net and the increase of electrically assisted features in future automobiles. Sparse-impedance spectroscopic technique described in this paper estimates the internal resistance of sealed automotive lead-acid batteries in the frequency range 10 Hz-10 kHz, usually produced by the alternators fitted in the automobiles. The state-of-health of the battery could be monitored from its internal resistance.

B Hariprakash¹ S K Martha¹ A K Shukla¹

1. Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560 012, India