Experimental Analysis of a Novel Cooling Material for Large Format Automotive Lithium-Ion Cells

Daniel Worwood, James Marco, Quirin Kellner, Elham Hosseinzadeh, Ryan McGlen, David Mullen, Kevin Lynn and David Greenwood
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Daniel Worwood: WMG, University of Warwick, Coventry CV4 7AL, UK
James Marco: WMG, University of Warwick, Coventry CV4 7AL, UK
Quirin Kellner: WMG, University of Warwick, Coventry CV4 7AL, UK
Elham Hosseinzadeh: WMG, University of Warwick, Coventry CV4 7AL, UK
Ryan McGlen: AAVID Thermacore Europe, Ashington NE63, UK
David Mullen: AAVID Thermacore Europe, Ashington NE63, UK
Kevin Lynn: AAVID Thermacore Europe, Ashington NE63, UK
David Greenwood: WMG, University of Warwick, Coventry CV4 7AL, UK

Energies, 2019, vol. 12, issue 7, 1-32

Abstract: Cooling the surface of large format batteries with solid conductive plates, or fins, has an inherent advantage of reducing the number of liquid seals relative to some mini-channel cold plate designs, as liquid is not passed through the numerous individual plates directly. This may reduce the overall pack leakage risk which is of utmost importance due to safety concerns associated with the possibility of a cell short circuit and thermal runaway event. However, fin cooling comes at a cost of an increased thermal resistance which can lead to higher cell temperatures and a poorer temperature uniformity under aggressive heat generation conditions. In this paper, a novel graphite-based fin material with an in-plane thermal conductivity 5 times greater than aluminium with the same weight is presented for advanced battery cooling. The thermal performance of the fin is benchmarked against conventional copper and aluminium fins in an experimental programme cycling real 53 Ah pouch cells. The results from the extensive experimental testing indicate that the new fin can reduce both the peak measured temperature and surface temperature gradient by up to 8 °C and 5 °C respectively, when compared to aluminium fins under an aggressive electric vehicle duty-cycle.

Keywords: lithium-ion; pouch-cell; battery thermal management; graphite; fin cooling (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: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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