Determining the limits and effects of high-rate cycling on lithium iron phosphate cylindrical cells
| Autor: | Michael J. Lain, Mark Copley, Faduma M. Maddar, David Greenwood, Justin Holloway, Emma Kendrick, Melanie Loveridge |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
cycle life
Work (thermodynamics) Materials science thermal fatigue Nuclear engineering TK Energy Engineering and Power Technology Lithium-ion battery chemistry.chemical_compound lcsh:TK1001-1841 Electrochemistry high rate cycling battery aging Electrical and Electronic Engineering Lithium iron phosphate cell failure lcsh:Production of electric energy or power. Powerplants. Central stations lcsh:Industrial electrochemistry chemistry Catastrophic failure Electrode Current (fluid) lithium ion battery Capacity loss Cycling lcsh:TP250-261 |
| Zdroj: | Batteries Volume 6 Issue 4 Batteries, Vol 6, Iss 57, p 57 (2020) |
| ISSN: | 2313-0105 |
| Popis: | The impacts on battery cell ageing from high current operation are investigated using commercial cells. This study utilised two tests&ndash (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&rsquo 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&rsquo 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. |
| Databáze: | OpenAIRE |
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