Vibration Durability Testing of Nickel Manganese Cobalt Oxide (NMC) Lithium-Ion 18,650 Battery Cells

James Michael Hooper, James Marco, Gael Henri Chouchelamane and Christopher Lyness
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James Michael Hooper: Warwick Manufacturing Group (WMG), University of Warwick, Coventry CV4 7AL, UK
James Marco: Warwick Manufacturing Group (WMG), University of Warwick, Coventry CV4 7AL, UK
Gael Henri Chouchelamane: Jaguar Land Rover, Banbury Road, Warwick, Coventry CV35 0XJ, UK
Christopher Lyness: Jaguar Land Rover, Banbury Road, Warwick, Coventry CV35 0XJ, UK

Energies, 2016, vol. 9, issue 1, 1-27

Abstract: Electric vehicle (EV) manufacturers are employing cylindrical format cells in the construction of the vehicles’ battery systems. There is evidence to suggest that both the academic and industrial communities have evaluated cell degradation due to vibration and other forms of mechanical loading. The primary motivation is often the need to satisfy the minimum requirements for safety certification. However, there is limited research that quantifies the durability of the battery and in particular, how the cells will be affected by vibration that is representative of a typical automotive service life (e.g., 100,000 miles). This paper presents a study to determine the durability of commercially available 18,650 cells and quantifies both the electrical and mechanical vibration-induced degradation through measuring changes in cell capacity, impedance and natural frequency. The impact of the cell state of charge (SOC) and in-pack orientation is also evaluated. Experimental results are presented which clearly show that the performance of 18,650 cells can be affected by vibration profiles which are representative of a typical vehicle life. Consequently, it is recommended that EV manufacturers undertake vibration testing, as part of their technology selection and development activities to enhance the quality of EVs and to minimize the risk of in-service warranty claims.

Keywords: vehicle vibration; electric vehicle (EV); Li-ion battery ageing; durability (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2016
References: View complete reference list from CitEc
Citations: View citations in EconPapers (11)

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