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A Review of state-of-charge indication of batteries by means of a.c. impedance measurements

Rodrigues, Shalini and Munichandraiah, N and Shukla, AK (2000) A Review of state-of-charge indication of batteries by means of a.c. impedance measurements. In: Journal of Power Sources, 87 (1-2). pp. 12-20.

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A non-destructive estimation of the state-of-charge (SoC) of batteries facilitates optimum utilization of the battery for a given application, as well as evaluation of its state-of-health. Among various methods, a.c. impedance spectroscopy over a wide range of frequencies provides a variety of parameters which are functions of the SoC of a given battery. These parameters and their variation with SoC depend on the type of battery and on the experimental conditions. The impedance data of sealed commercial cells are rather tedious to analyze since the results are generally the combined parameters of both the positive and the negative electrodes. Separation of the parameters which correspond to the individual electrodes involves assumptions, the validity of which is open to question. Nevertheless, systematic linear and reproducible variations of measurable or computable impedance parameters with battery condition are useful indicators of the SoC in a non-destructive way. The present review consolidates the literature on the prediction of the SoC of batteries by means of a.c. impedance measurements.

Item Type: Journal Article
Publication: Journal of Power Sources
Publisher: Elsevier
Additional Information: Copyright of this article belongs to Elsevier.
Keywords: a.c. impedance;State-of-charge;Primary batteries;Secondary batteries
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 30 Jun 2006
Last Modified: 19 Sep 2010 04:29
URI: http://eprints.iisc.ac.in/id/eprint/7661

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