Finegan, DP;
Darst, J;
Walker, W;
Li, Q;
Yang, C;
Jervis, R;
Heenan, TMM;
... Darcy, E; + view all
(2019)
Modelling and experiments to identify high-risk failure scenarios for testing the safety of lithium-ion cells.
Journal of Power Sources
, 417
pp. 29-41.
10.1016/j.jpowsour.2019.01.077.
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Abstract
Intentionally inducing worst-case thermal runaway scenarios in Li-ion cells on-demand is a definitive way to test the efficacy of battery systems in safely mitigating the consequences of catastrophic failure. An internal shortcircuiting (ISC) device is implanted into three 18650 cell designs: one standard, one with a bottom vent, and one with a thicker casing. Through an extensive study of 228 cells, the position at which thermal runaway initiates is shown to greatly affect the tendency of cells to rupture and incur side-wall breaches at specific locations. The risks associated with each failure mechanism and position of the ISC device are quantified using a custom calorimeter that can decouple the heat from ejected and non-ejected contents. Causes of high-risk failure mechanisms, such as bursting and side-wall breaches, are elucidated using high-speed synchrotron X-ray imaging at 2000 frames per second and image-based 3D thermal runaway computational models, which together are used to construct a comprehensive description of external risks based on internal structural and thermal phenomena.v
| Type: | Article |
|---|---|
| Title: | Modelling and experiments to identify high-risk failure scenarios for testing the safety of lithium-ion cells |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.jpowsour.2019.01.077 |
| Publisher version: | https://doi.org/10.1016/j.jpowsour.2019.01.077 |
| Language: | English |
| Additional information: | Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/BY/4.0/) |
| Keywords: | Li-ion battery, Calorimetry, Thermal runaway, Modelling, X-ray imaging |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10069640 |
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