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The effect of test conditions on the relative performance of cylindrical lithium-ion cells
File(s)
Author(s)
Marzook, M Waseem
Eaton, James
Samieian, Mohammad Amin
Patel, Yatish
Offer, Gregory
Type
Journal Article
Abstract
The quickest and simplest way to benchmark cells against one another is through the comparison of datasheets and rapid standardised testing of cells. However, typical datasheets provide information based on cells tested under constant current load profiles in controlled ambient temperature. These test conditions are unrepresentative of most real applications. This work selects and benchmarks six 21700 cylindrical cells under four different test categories and two cooling conditions, to determine if relative performance of cells translates from standardised current and thermal conditions to more realistic currents and conditions. It is found that these cells perform very differently under different thermal boundary conditions, changing their capacity and thermal percentile rankings with respect to one another by up to 20 %. Furthermore, when tested under a drive cycle, many of these cells display percentile ranking changes of up to 30 % from a constant current equivalent cycle. This work demonstrates the need to test battery cells under accurate, application-focused conditions to correctly compare performance. Cell testing should use application-specific thermal and electrical setups, and application relevant load cycles. The assumption that the cell that performs best under standardised conditions will perform best under the real application is shown to be false.
Date Issued
2025-01-01
Date Acceptance
2024-11-01
Citation
Journal of Energy Storage, 2025, 105
URI
URL
DOI
ISSN
2352-152X
Publisher
Elsevier
Journal / Book Title
Journal of Energy Storage
Volume
105
Copyright Statement
© 2025 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
License URL
Identifier
10.1016/j.est.2024.114485
Subjects
BATTERY
Energy & Fuels
HEAT-GENERATION
Science & Technology
Technology
Publication Status
Published
Article Number
114485
Date Publish Online
2024-11-24