Frequency Domain Analysis For Electrochemical Supercapacitors

Valeriy Martynyuk, Denis Makaryshkin, Juliy Boyko

Abstract

The paper deals with the problem of creating a non-linear model of the electrochemical supercapacitors and measuring their electrical parameters in wide frequency range. Formalization of the model as a non-linear equivalent circuit enables to explain non-linear behavior of electrochemical supercapacitors such as dependence of their capacity and electrical series resistance (ESR) on the different voltage levels and frequencies. In order to determine the non-linear supercapacitor equivalent circuit parameters we carry out the impedance measurements and then perform fitting of obtained measurement results by means of impedance function, which describes the electrochemical supercapacitor non-linear properties with greater accuracy.

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IMEKO-TC4-2007-008.pdf

DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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