Imperial College London
Alternate

Prof Gregory Offer

Faculty of Engineering, Department of Mechanical Engineering

Professor in Electrochemical Engineering
 
 
 
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Contact

 

+44 (0)20 7594 7072gregory.offer Website

 
 
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Location

 

720City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Marzook:2022:10.1016/j.est.2022.105217,
author = {Marzook, MW and Hales, A and Patel, Y and Offer, G and Marinescu, M},
doi = {10.1016/j.est.2022.105217},
journal = {Journal of Energy Storage},
pages = {1--9},
title = {Thermal evaluation of lithium-ion batteries: Defining the cylindrical cell cooling coefficient},
url = {http://dx.doi.org/10.1016/j.est.2022.105217},
volume = {54},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Managing temperatures of lithium-ion cells in battery packs is crucial to ensuring their safe operation. However, thermal information provided on typical cell datasheets is insufficient to identify which cells can be easily thermally managed. The Cell Cooling Coefficient (CCC) aims to fill this gap, as a metric that defines the thermal dissipation from a cell when rejecting its own heat. While the CCC has been defined and used for pouch cells, no similar measure has been proven for cylindrical cells. This work successfully defines and measures the CCC for cylindrical cells under base cooling (CCCBase), defined as the heat rejected through the base divided by the temperature difference from the base to positive cap. Using a non-standard, electrically optimised connection, the maxima for CCCBase of an LG M50T (21700) and Samsung 30Q (18650) cell are successfully measured to be 0.139 and 0.115 W K−1, respectively. Even though the 21700 has a higher CCCBase, indicating that the cell can be cooled more efficiently, comparing the CCCBase per area the 18650 can reject 13 % more heat for a given cooled area. A worked example demonstrates the equal importance of understanding heat generation alongside the CCC, for both cell design and down selecting cells.
AU  - Marzook,MW
AU  - Hales,A
AU  - Patel,Y
AU  - Offer,G
AU  - Marinescu,M
DO  - 10.1016/j.est.2022.105217
EP  - 9
PY  - 2022///
SN  - 2352-152X
SP  - 1
TI  - Thermal evaluation of lithium-ion batteries: Defining the cylindrical cell cooling coefficient
T2  - Journal of Energy Storage
UR  - http://dx.doi.org/10.1016/j.est.2022.105217
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000829817200004&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://www.sciencedirect.com/science/article/pii/S2352152X22012166?via%3Dihub
UR  - http://hdl.handle.net/10044/1/98852
VL  - 54
ER  -
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