An experimental study on prototype lithium-sulfur cells for ageing analysis and state-of-health estimation

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dc.contributor.authorShateri, Neda
dc.contributor.authorAuger, Daniel J.
dc.contributor.authorFotouhi, Abbas
dc.contributor.authorBrighton, James
dc.date.accessioned2021-07-08T10:48:15Z
dc.date.available2021-07-08T10:48:15Z
dc.date.issued2021-02-16
dc.description.abstractLithium-Sulfur (Li-S) batteries offer a potential for higher gravimetric energy density in comparison to lithium-ion batteries. Since they behave quite different from lithium-ion batteries, distinctive approaches to state estimation and battery management are required to be developed specifically for them. This paper describes an experimental work to model and perform real-time estimation of the progression of use-induced ageing in prototype Li-S cells. To do that, state-of-the-art 19 Ah Li-S pouch cells were subject to cycling tests in order to determine progressive changes in parameters of a nonlinear equivalent-circuit-network (ECN) model due to ageing. A state-of-health (SoH) estimation algorithm was then designed to work based on identifying ECN parameters using Forgetting-Factor Recursive Least Squares (FFRLS). Two techniques, nonlinear curve fitting and Support Vector Machine (SVM) classification, were used to generate SoH values according to the identified parameters. The results demonstrate that Li-S cell’s SoH can be estimated with an acceptable level of accuracy of 96.7% using the proposed method under realistic driving conditions. Another important outcome was that the ‘power fade’ in Li-S cells happens at a much slower rate than the ‘capacity fade’ which is a useful feature for applications where consistency of power delivery is important.en_UK
dc.identifier.citationShateri N, Auger DJ, Fotouhi A, Brighton J. (2021) An experimental study on prototype lithium-sulfur cells for ageing analysis and state-of-health estimation. IEEE Transactions on Transportation Electrification, Volume 7, Number 3, September 2021, pp. 1324-1338en_UK
dc.identifier.issn2332-7782
dc.identifier.urihttps://doi.org/10.1109/TTE.2021.3059738
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/16857
dc.language.isoenen_UK
dc.publisherIEEEen_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectSVM Classifieren_UK
dc.subjectState of Health Estimationen_UK
dc.subjectParameter Identificationen_UK
dc.subjectexperimental testen_UK
dc.subjectLithium-Sulfur Batteryen_UK
dc.titleAn experimental study on prototype lithium-sulfur cells for ageing analysis and state-of-health estimationen_UK
dc.typeArticleen_UK

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