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Experimental modal analysis of lithium-ion pouch cells

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Hooper, James Michael and Marco, James (2015) Experimental modal analysis of lithium-ion pouch cells. Journal of Power Sources, Volume 286 . pp. 247-259. doi:10.1016/j.jpowsour.2015.03.098 ISSN 0378-7753.

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Official URL: http://dx.doi.org/10.1016/j.jpowsour.2015.03.098

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Abstract

If future electric and hybrid electric vehicle batteries are to be designed such that the impact of vibration induced resonance is minimized, engineers tasked with the design of the vehicle’s energy storage system must have a rigorous understanding of key system attributes such as the natural frequencies of the cell, the level of damping present and the mode shapes induced within the battery under mechanical load. This paper describes the underpinning theory and experimental method employed when using the impulse excitation technique to quantify the natural frequencies and mode shapes of a commercially available 25 Ah Nickel Manganese Cobalt Oxide (NMC) Laminate Pouch Cell. Experimental results are presented for fifteen cells at five different values of state of charge (SOC). The results indicate that irrespective of the energy content within the cell, the same four modes of vibration (torsion and bending) exist within a frequency range of 191 Hz – 360 Hz. This is above the frequency range (0 - 150 Hz) typically associated with road-induced vibration. The results also indicate that the cell’s natural frequencies of vibration and damping do not vary with changing values of SOC.

Item Type: Journal Article
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
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): Automobiles -- Vibration, Electric vehicles, Hybrid electric vehicles, Electric batteries -- Testing, Active noise and vibration control
Journal or Publication Title: Journal of Power Sources
Publisher: Elsevier S.A.
ISSN: 0378-7753
Official Date: 1 July 2015
Dates:
DateEvent
1 July 2015Published
17 March 2015Available
15 March 2015Accepted
12 February 2015Updated
11 December 2014Submitted
Volume: Volume 286
Number of Pages: 13
Page Range: pp. 247-259
DOI: 10.1016/j.jpowsour.2015.03.098
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access (Creative Commons)
Date of first compliant deposit: 29 December 2015
Date of first compliant Open Access: 29 December 2015
Funder: Engineering and Physical Sciences Research Council (EPSRC), Innovate UK, Jaguar PLC
Grant number: EP/I01585X/1 (EPSRC)

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