Degradation in parallel-connected lithium-ion battery packs under thermal gradients
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| Publicat a: | Communications Engineering vol. 3, no. 1 (Dec 2024), p. 2 |
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| Autor principal: | |
| Altres autors: | , |
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Springer Nature B.V.
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| Accés en línia: | Citation/Abstract Full Text Full Text - PDF |
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| 001 | 2910045927 | ||
| 003 | UK-CbPIL | ||
| 022 | |a 2731-3395 | ||
| 024 | 7 | |a 10.1038/s44172-023-00153-5 |2 doi | |
| 035 | |a 2910045927 | ||
| 045 | 2 | |b d20241201 |b d20241231 | |
| 100 | 1 | |a Naylor Marlow, Max |u Imperial College London, Dyson School of Design Engineering, London, UK (GRID:grid.7445.2) (ISNI:0000 0001 2113 8111) | |
| 245 | 1 | |a Degradation in parallel-connected lithium-ion battery packs under thermal gradients | |
| 260 | |b Springer Nature B.V. |c Dec 2024 | ||
| 513 | |a Journal Article | ||
| 520 | 3 | |a Practical lithium-ion battery systems require parallelisation of tens to hundreds of cells, however understanding of how pack-level thermal gradients influence lifetime performance remains a research gap. Here we present an experimental study of surface cooled parallel-string battery packs (temperature range 20–45 °C), and identify two main operational modes; convergent degradation with homogeneous temperatures, and (the more detrimental) divergent degradation driven by thermal gradients. We attribute the divergent case to the, often overlooked, cathode impedance growth. This was negatively correlated with temperature and can cause positive feedback where the impedance of cells in parallel diverge over time; increasing heterogeneous current and state-of-charge distributions. These conclusions are supported by current distribution measurements, decoupled impedance measurements and degradation mode analysis. From this, mechanistic explanations are proposed, alongside a publicly available aging dataset, which highlights the critical role of capturing cathode degradation in parallel-connected batteries; a key insight for battery pack developers.Max Naylor Marlow and coworkers investigate the effects of thermal gradients on lifetime degradation of parallel-string battery systems. They experimentally demonstrate previously overlooked cathode impedance growth is a key contributor to the heterogeneities on pack degradation, providing insights for battery developers. | |
| 653 | |a Impedance | ||
| 653 | |a Lithium-ion batteries | ||
| 653 | |a Heat treating | ||
| 653 | |a Cathodes | ||
| 653 | |a Charge distribution | ||
| 653 | |a Temperature gradients | ||
| 653 | |a Aging | ||
| 653 | |a Temperature | ||
| 653 | |a Positive feedback | ||
| 653 | |a Electric vehicles | ||
| 653 | |a Current distribution | ||
| 653 | |a Degradation | ||
| 653 | |a Strings | ||
| 653 | |a Boundary conditions | ||
| 653 | |a Parallel connected | ||
| 653 | |a Lithium | ||
| 653 | |a Rechargeable batteries | ||
| 700 | 1 | |a Chen, Jingyi |u Imperial College London, Dyson School of Design Engineering, London, UK (GRID:grid.7445.2) (ISNI:0000 0001 2113 8111) | |
| 700 | 1 | |a Wu, Billy |u Imperial College London, Dyson School of Design Engineering, London, UK (GRID:grid.7445.2) (ISNI:0000 0001 2113 8111) | |
| 773 | 0 | |t Communications Engineering |g vol. 3, no. 1 (Dec 2024), p. 2 | |
| 786 | 0 | |d ProQuest |t Science Database | |
| 856 | 4 | 1 | |3 Citation/Abstract |u https://www.proquest.com/docview/2910045927/abstract/embedded/7BTGNMKEMPT1V9Z2?source=fedsrch |
| 856 | 4 | 0 | |3 Full Text |u https://www.proquest.com/docview/2910045927/fulltext/embedded/7BTGNMKEMPT1V9Z2?source=fedsrch |
| 856 | 4 | 0 | |3 Full Text - PDF |u https://www.proquest.com/docview/2910045927/fulltextPDF/embedded/7BTGNMKEMPT1V9Z2?source=fedsrch |