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An exploration of Li-ion cell relaxation using EIS

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Barai, Anup, Guo, Yue, McGordon, Andrew and Jennings, P. A. (Paul A.) (2014) An exploration of Li-ion cell relaxation using EIS. In: FISITA world automotive congress, Maastricht, Netherlands, 2-6 Jun 2014

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Abstract

This paper describes a systematic study of the effect of cell relaxation after a charge or discharge event. The EIS technique was used to investigate how the properties of the cells changed with time after charge or discharge up to a maximum of 15 hours. It was found that different chemistries show different relaxation rates and frequency dependence of Ro and Rd. The cells still showed a relaxation at 15 hours after a charge/discharge event. A suggested compromise of measurement accuracy and test length is to measure the properties of cells 4 hours after a charge/discharge event.

Item Type: Conference Item (Paper)
Subjects: T Technology > TL Motor vehicles. Aeronautics. Astronautics
Divisions: Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group)
Library of Congress Subject Headings (LCSH): Lithium ion batteries
Official Date: 2014
Dates:
DateEvent
2014Available
Status: Peer Reviewed
Publication Status: Published
Funder: Warwick Manufacturing Group
Conference Paper Type: Paper
Title of Event: FISITA world automotive congress
Type of Event: Conference
Location of Event: Maastricht, Netherlands
Date(s) of Event: 2-6 Jun 2014
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