Finegan, DP;
Tjaden, B;
Heenan, TMM;
Jervis, R;
Michiel, MD;
Rack, A;
Hinds, G;
... Shearing, PR; + view all
(2017)
Tracking internal temperature and structural dynamics during nail penetration of lithium-ion cells.
Journal of the Electrochemical Society
, 164
(13)
A3285-A3291.
10.1149/2.1501713jes.
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Abstract
Mechanical abuse of lithium-ion batteries is widely used during testing to induce thermal runaway, characterize associated risks, and expose cell and module vulnerabilities. However, the repeatability of puncture or ‘nail penetration’ tests is a key issue as there is often a high degree of variability in the resulting thermal runaway process. In this work, the failure mechanisms of 18650 cells punctured at different locations and orientations are characterized with respect to their internal structural degradation, and both their internal and surface temperature, all of which are monitored in real time. The initiation and propagation of thermal runaway is visualized via high-speed synchrotron X-ray radiography at 2000 frames per second, and the surface and internal temperatures are recorded via infrared imaging and a thermocouple embedded in the tip of the penetrating nail, respectively. The influence of the nail, as well as how and where it penetrates the cell, on the initiation and propagation of thermal runaway is described and the suitability of this test method for representing in-field failures is discussed.
| Type: | Article |
|---|---|
| Title: | Tracking internal temperature and structural dynamics during nail penetration of lithium-ion cells |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1149/2.1501713jes |
| Publisher version: | http://dx.doi.org/10.1149/2.1501713jes |
| Language: | English |
| Additional information: | Copyright © The Author(s) 2017. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited. |
| Keywords: | Lithium ion batteries, Nail penetration, 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-pp.ucl.ac.uk/id/eprint/10041414 |
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