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Determining the limits and effects of high-rate cycling on lithium iron phosphate cylindrical cells
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Holloway, Justin, Maddar, Faduma, Lain, Michael J., Loveridge, Melanie, Copley, Mark, Kendrick, Emma and Greenwood, David G. (2020) Determining the limits and effects of high-rate cycling on lithium iron phosphate cylindrical cells. Batteries, 6 (4). 57. doi:10.3390/batteries6040057
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Official URL: https://doi.org/10.3390/batteries6040057
Abstract
The impacts on battery cell ageing from high current operation are investigated using commercial cells. This study utilised two tests−(i) to establish the maximum current limits before cell failure and (ii) applying this maximum current until cell failure. Testing was performed to determine how far cycling parameters could progress beyond the manufacturer’s recommendations. Current fluxes were increased up to 100 C cycling conditions without the cell undergoing catastrophic failure. Charge and discharge current capabilities were possible at magnitudes of 1.38 and 4.4 times, respectively, more than that specified by the manufacturer’s claims. The increased current was used for longer term cycling tests to 500 cycles and the resulting capacity loss and resistance increase was dominated by thermal fatigue of the electrodes. This work shows that there is a discrepancy between manufacturer-stated current limits and actual current limits of the cell, before the cell undergoes catastrophic failure. This presumably is based on manufacturer-defined performance and lifetime criteria, as well as prioritised safety factors. For certain applications, e.g., where high performance is needed, this gap may not be suitable; this paper shows how this gap could be narrowed for these applications using the testing described herein.
| Item Type: | Journal Article | ||||||||||||||||||
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| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering | ||||||||||||||||||
| Divisions: | Faculty of Science > WMG (Formerly the Warwick Manufacturing Group) | ||||||||||||||||||
| SWORD Depositor: | Library Publications Router | ||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Lithium ion batteries , Lithium ion batteries -- Thermal conductivity, Storage batteries | ||||||||||||||||||
| Journal or Publication Title: | Batteries | ||||||||||||||||||
| Publisher: | MDPI | ||||||||||||||||||
| ISSN: | 2313-0105 | ||||||||||||||||||
| Official Date: | 23 November 2020 | ||||||||||||||||||
| Dates: |
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| Date of first compliant deposit: | 14 December 2020 | ||||||||||||||||||
| Volume: | 6 | ||||||||||||||||||
| Number: | 4 | ||||||||||||||||||
| Article Number: | 57 | ||||||||||||||||||
| DOI: | 10.3390/batteries6040057 | ||||||||||||||||||
| Status: | Peer Reviewed | ||||||||||||||||||
| Publication Status: | Published | ||||||||||||||||||
| Access rights to Published version: | Open Access | ||||||||||||||||||
| RIOXX Funder/Project Grant: |
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