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Extraction of the parameters of a fractional order equivalent circuit model based on time-domain relaxation measurements

Heim, Christopher and Wagner, Norbert and Strunz, Werner and Friedrich, K. Andreas (2017) Extraction of the parameters of a fractional order equivalent circuit model based on time-domain relaxation measurements. International Workshop on Impedance Spectroscopy (IWIS), 27.-29.Sept. 2017, Chemnitz.

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Abstract

In this work we apply concepts from fractional calculus to achieve a time-domain description of parallel resistor-constant-phase-elements for the accurate fitting of time-domain current-step responses. To achieve an accurate description of the fractional equivalent circuit in the time domain we formulate an equation based on the Mittag-Leffler function from fractional mathematics. Advantages of this approach allow a direct evaluation of impedance parameters for the assumed equivalent circuit model function without any further transformation to the frequency domain. To this end we explore the ability of fractional order models to fit the time-domain response of a system and if the real impedance spectrum could be reproduced by comparisons to actually measured impedance spectra of 18650 cells.

Item URL in elib:https://elib.dlr.de/114679/
Document Type:Conference or Workshop Item (Poster)
Title:Extraction of the parameters of a fractional order equivalent circuit model based on time-domain relaxation measurements
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Heim, Christopherchristopher.heim (at) dlr.deUNSPECIFIED
Wagner, NorbertNorbert.Wagner (at) dlr.dehttps://orcid.org/0000-0002-2596-8689
Strunz, Wernerzahner-elektrikUNSPECIFIED
Friedrich, K. Andreasandreas.friedrich (at) dlr.deUNSPECIFIED
Date:28 September 2017
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Relaxation Lithium-Ionenbatterien Ersatzschaltbild Impedanzspektrokopie
Event Title:International Workshop on Impedance Spectroscopy (IWIS)
Event Location:Chemnitz
Event Type:international Conference
Event Dates:27.-29.Sept. 2017
Organizer:TU Chemnitz
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Electrochemical Energy Storage
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Electrochemical Prcesses (Batteries)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Wagner, Dr.rer.nat. Norbert
Deposited On:01 Dec 2017 12:50
Last Modified:31 Jul 2019 20:12

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