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Frequency domain non-linear characterisation and analysis of lithium-ion battery electrodes

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Fan, Chuanxin, O'Regan, K., Li, Liuying, Kendrick, E. and Widanage, Widanalage Dhammika (2021) Frequency domain non-linear characterisation and analysis of lithium-ion battery electrodes. Journal of Energy Storage, 36 . 102371. doi:10.1016/j.est.2021.102371

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Official URL: https://doi.org/10.1016/j.est.2021.102371

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Abstract

As an electrochemical system, the current voltage relationship of a lithium-ion battery is non-linear. The accuracy of conventional models for lithium-ion cells always suffer from non-linear dynamic behavior, especially at low SoC levels and high current levels, which limits practical applications of battery models in reality. In-depth understanding and characterization of the non-linear relationship can provide valuable insight to improve the accuracy of battery modeling. In this paper, a frequency domain non-linearity characterization approach using odd random-phase multisines signals is performed on a three-electrode experimental set-up of a commercial 5Ah cylindrical 21700 cell. This allowed the distortions towards the full-cell voltage to be separated into the corresponding electrodes and identify the nature of non-linearity as odd or even order. The results demonstrate that the even order non-linearity from the cathode is the main contributor towards the full-cell voltage of the lithium-ion battery while the non-linearity from the anode starts to dominate at very low (

Item Type: Journal Article
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group)
Library of Congress Subject Headings (LCSH): Lithium ion batteries , Storage batteries , Electric batteries -- Electrodes
Journal or Publication Title: Journal of Energy Storage
Publisher: Elsevier
ISSN: 2352-152X
Official Date: April 2021
Dates:
DateEvent
April 2021Published
11 February 2021Available
31 January 2021Accepted
Volume: 36
Article Number: 102371
DOI: 10.1016/j.est.2021.102371
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
09ESWM21Warwick Manufacturing Grouphttp://viaf.org/viaf/123628346
UNSPECIFIEDinstitute of digital engineeringhttps://www.ideuk.org/
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