Supercapacitor impedance in time and frequency domains

Author

Cuadras, Angel ; Ovejas, Victoria-Julia

Author_Institution

Instrum., Sensors & Interfaces Group (ISI), Univ. Politec. Catalunya, Castelldefels, Spain

fYear

2012

fDate

20-23 March 2012

Firstpage

1

Lastpage

6

Abstract

In this contribution we estimate supercapacitor impedance from temporal measurements from two points of view: i) fitting a predefined model to the temporal data and ii) transform time domain analysis to frequency domain to obtain a generalized impedance. A comparison between both methods is provided. In the temporal analyses we started with an a priori model: data was fitted to a three-model parameter. In the frequency domain, we obtained the impedance after temporal data conversion without an initial model. Frequency approach is limited by supercapacitor noise. We concluded that the frequency domain approach is preferable, and shows good agreement with conventional impedance spectroscopy techniques.

Keywords

frequency-domain analysis; supercapacitors; time-domain analysis; a priori model; frequency approach; frequency domains; generalized impedance; impedance spectroscopy techniques; supercapacitor impedance; supercapacitor noise; temporal data conversion; three-model parameter; transform time domain analysis; impedance; noise; state of charge; supercapacitor; temporal measurements;

fLanguage

English

Publisher

ieee

Conference_Titel

Systems, Signals and Devices (SSD), 2012 9th International Multi-Conference on

Conference_Location

Chemnitz

Print_ISBN

978-1-4673-1590-6

Electronic_ISBN

978-1-4673-1589-0

Type

conf

DOI

10.1109/SSD.2012.6198096

Filename

6198096