Determination of supercapacitor metrics using a magnitude-only method

Impedance spectroscopy is a powerful tool to study the frequency behavior of supercapacitors, but it comes with pricy hardware and postprocessing routines. Here we present a non-impedance method to extract the fractional-order model parameters (R s , C α , α) of a supercapacitor-assumed to be equiva...

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Bibliographic Details
Published in2016 IEEE International Symposium on Circuits and Systems (ISCAS) pp. 1186 - 1189
Main Authors Maundy, B. J., Elwakil, A., Freeborn, T., Allagui, A.
Format Conference Proceeding Journal Article
LanguageEnglish
Published IEEE 01.05.2016
Subjects
Batteries
Biomedical measurement
Circuits
Constants
Equivalence
Fractional circuits
Hardware
Impedance
Integrated circuit modeling
Mathematical models
Negative feedback
Parameters
Spectroscopy
Supercapacitors
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Summary:Impedance spectroscopy is a powerful tool to study the frequency behavior of supercapacitors, but it comes with pricy hardware and postprocessing routines. Here we present a non-impedance method to extract the fractional-order model parameters (R s , C α , α) of a supercapacitor-assumed to be equivalent to a series association of a resistance with a constant phase element-using the magnitude response of a measurement circuit consisting of a large bandwidth operational amplifier with negative feedback. The theory behind the measurement circuit, along with the extraction method of the model parameters, and validation within 1% error using simulated and experimental results from a commercial supercapacitor are presented and discussed.
Bibliography:ObjectType-Article-2
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SourceType-Conference Papers & Proceedings-2
ISSN:2379-447X
DOI:10.1109/ISCAS.2016.7527458