Frequency domain parametric estimation of fractional order impedance models for Li-ion batteries

Freja Vandeputte, Noel Hallemans, Jishnu Ayyangatu Kuzhiyil, Nessa Fereshteh Saniee, Widanalage Dhammika Widanage, John Lataire

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Samenvatting

The impedance of a Li-ion battery contains information about its state of charge (SOC), state of health (SOH) and remaining useful life (RUL). Commonly, electrochemical impedance spectroscopy (EIS) is used as a nonparametric data-driven technique for estimating this impedance from current and voltage measurements. In this article, however, we propose a consistent parametric estimation method based on a fractional order equivalent circuit model (ECM) of the battery impedance. Contrary to the nonparametric impedance estimate, which is only defined at the discrete set of excited frequencies, the parametric estimate can be evaluated in every frequency of the frequency band of interest. Moreover, we are not limited to a single sine or multisine excitation signal. Instead, any persistently exciting signal, like for example a noise excitation signal, will suffice. The parametric estimation method is first validated on simulations and then applied to measurements of commercial Samsung 48X cells. For now, only batteries in rest, i.e. at a constant SOC after relaxation, are considered.
Originele taal-2English
Titel22nd World Congress of the International Federation of Automatic Control
RedacteurenHideaki Ishii, Yoshio Ebihara, Jun-ichi Imura, Masaki Yamakita
UitgeverijIFAC - PapersOnLine
Pagina's4325-4330
Aantal pagina's6
Volume56
Uitgave2
ISBN van geprinte versie2405-8963
DOI's
StatusPublished - feb 2023
EvenementIFAC World Congress 2023: The 22nd World Congress of the International Federation of Automatic Control - Yokohama, Japan
Duur: 9 jul 202314 jul 2023
https://www.ifac2023.org/

Publicatie series

NaamIFAC-PapersOnLine
Nummer2
Volume56
ISSN van elektronische versie2405-8963

Conference

ConferenceIFAC World Congress 2023
Land/RegioJapan
StadYokohama
Periode9/07/2314/07/23
Internet adres

Bibliografische nota

Publisher Copyright:
Copyright © 2023 The Authors. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/)

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