Supercapacitor impedance in time and frequency domains

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Title:	Supercapacitor impedance in time and frequency domains
Author:	Cuadras Tomàs, Àngel; Ovejas Benedicto, Victòria Júlia
Other authors:	Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica; Universitat Politècnica de Catalunya. GRUP ISI - Grup d'Instrumentació, Sensors i Interfícies
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.
Subject(s):	-Àrees temàtiques de la UPC::Enginyeria electrònica::Components electrònics -Supercapacitors -Time-domain analysis -Component -Supercapacitor -Impedance -Measurements -State of charge -Noise -Supercondensadors -Circuits elèctrics -- Anàlisi
Rights:	Attribution-NonCommercial-NoDerivs 3.0 Spain http://creativecommons.org/licenses/by-nc-nd/3.0/es/
Document type:	Article - Published version Conference Object
Published by:	IEEE
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