Fransson, M;
Broche, L;
Buckwell, M;
Pfaff, J;
Reid, H;
Kirchner-Burles, C;
Pham, M;
... Shearing, P; + view all
(2023)
Sidewall breach during lithium-ion battery thermal runaway triggered by cell-to-cell propagation visualized using high-speed X-ray imaging.
Journal of Energy Storage
, 71
, Article 108088. 10.1016/j.est.2023.108088.
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Abstract
With the rapid deployment of Li-ion batteries (LiBs) in a range of applications, it is crucial to ensure their safe operation. Therefore, it is necessary to investigate the rapid thermal runaway failure that LiBs can undergo if improperly operated or subjected to abuse scenarios so that hazardous events can be avoided or mitigated. Sidewall breaches or ruptures of LiBs during thermal runaway are considered the most hazardous failure scenario, resulting in hot abrasive flare from the casing of the cell that can impinge on neighbouring cells and lead to the propagation of thermal runaway throughout a battery pack. Yet, the process leading up to the sidewall breach is not well understood due to the extreme difficulty in visualizing such a failure in commercially relevant cells. With the application of a newly developed chamber for remote-controlled abuse testing of batteries coupled with simultaneous X-ray imaging, we demonstrate here for the first time an in-situ visualization of a sidewall breach. By further applying spatiotemporal mapping techniques, the internal thermal runaway events leading up to the sidewall breach can be analyzed in detail. Subsequently, the speed of the electrode layer delamination could be calculated to a speed of 0.6 m/s. These new insights bring more clarity regarding this phenomenon, that in turn can help battery designers improve battery safety.
| Type: | Article |
|---|---|
| Title: | Sidewall breach during lithium-ion battery thermal runaway triggered by cell-to-cell propagation visualized using high-speed X-ray imaging |
| DOI: | 10.1016/j.est.2023.108088 |
| Publisher version: | http://dx.doi.org/10.1016/j.est.2023.108088 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Technology, Energy & Fuels, Lithium -ion battery, Failure testing, Battery safety, Thermal runaway, Sidewall breach, Synchrotron, 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/10188135 |
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