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{White:2022:10.1016/j.applthermaleng.2022.118573,
author = {White, G and Hales, A and Patel, Y and Offer, G},
doi = {10.1016/j.applthermaleng.2022.118573},
journal = {APPLIED THERMAL ENGINEERING},
pages = {1--12},
title = {Novel methods for measuring the thermal diffusivity and the thermal conductivity of a lithium-ion battery},
url = {http://dx.doi.org/10.1016/j.applthermaleng.2022.118573},
volume = {212},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Thermal conductivity is a fundamental parameter in every battery pack model. It allows for the calculation of internal temperature gradients which affect cell safety and cell degradation. The accuracy of the measurement for thermal conductivity is directly proportional to the accuracy of any thermal calculation. Currently the battery industry uses archaic methods for measuring this property which have errors up to 50 %. This includes the constituent material approach, the Searle’s bar method, laser/Xeon flash and the transient plane source method. In this paper we detail three novel methods for measuring both the thermal conductivity and the thermal diffusivity to within 5.6 %. These have been specifically designed for bodies like lithium-ion batteries which are encased in a thermally conductive material. The novelty in these methods comes from maintaining a symmetrical thermal boundary condition about the middle of the cell. By using symmetric boundary conditions, the thermal pathway around the cell casing can be significantly reduced, leading to improved measurement accuracy. These novel methods represent the future for thermal characterisation of lithium-ion batteries. Continuing to use flawed measurement methods will only diminish the performance of battery packs and slow the rate of decarbonisation in the transport sector.
AU  - White,G
AU  - Hales,A
AU  - Patel,Y
AU  - Offer,G
DO  - 10.1016/j.applthermaleng.2022.118573
EP  - 12
PY  - 2022///
SN  - 1359-4311
SP  - 1
TI  - Novel methods for measuring the thermal diffusivity and the thermal conductivity of a lithium-ion battery
T2  - APPLIED THERMAL ENGINEERING
UR  - http://dx.doi.org/10.1016/j.applthermaleng.2022.118573
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000800476500002&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://www.sciencedirect.com/science/article/pii/S1359431122005233?via%3Dihub
UR  - http://hdl.handle.net/10044/1/97894
VL  - 212
ER  -
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