the role of cell geometry when selecting tab or surface cooling to minimise cell degradation论文.pdf

eTransportation 5 (2020) 100073
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The role of cell geometry when selecting tab or surface cooling to
minimise cell degradation
Oskar Dondelewski , Teddy Szemberg O’Connor , Yan Zhao , Ian A. Hunt ,
*
Alexander Holland , Alastair Hales , Gregory J. Offer , Yatish Patel
Department of Mechanical Engineering, Imperial College London, Exhibition Road, SW7 2AZ, London, United Kingdom
article info abstract
Article history: Thermal management of lithium ion batteries is critical to maintain cells at their optimum temperature
Received 31 March 2020 and balance performance with degradation. Previous work has shown tab cooling to be better for per-
Received in revised form formance and lifetime, but only if sufficient heat removal can be achieved, which depends in part on cell
21 May 2020
geometry. In this paper, a large form-factor pouch cell is shown to suffer from faster degradation when
Accepted 8 June 2020
tab-cooled although still benefitting from higher useable energy. This paper introduces the ratio of
Available online 25 July 2020
surface-to-tab cell cooling coefficient, CCCratio, as a qualitative measure to assess a cell’s suitability for tab
cooling. For low CCC cells, tab cooling results in more useable energy and lower degradation rates
Keywords: