Abstract
In order to develop a deeper understanding of the behaviour of commercial automotive lithium-ion pouch cells under short-circuiting conditions, two scenarios were experimentally investigated and compared. Firstly, experiments were conducted by internally shorting 15 Ah cells by full nail penetration using three different nail materials; copper, steel and plastic. A second set of experiments involved externally shorting the cell tabs using an external circuit with a range of resistance values. In both scenarios the cell electrical and thermal response were determined by the shorting resistance. In the case of nail penetration there was a clear distinction between the outcome of the conducting and non-conducting nails, although the outcome using conducting nails suffered from poor reproducibility. The poor reproducibility was attributed to the variation in the contact resistance between the nail and the cell layers. Correlating the outcome of both tests can be used to estimate the shorting resistance and construct the current profile during nail penetration test.
| Original language | English |
|---|---|
| Pages (from-to) | 211-217 |
| Number of pages | 7 |
| Journal | Journal of Energy Storage |
| Volume | 16 |
| Early online date | 6 Feb 2018 |
| DOIs | |
| Publication status | Published - 1 Apr 2018 |
Funding
The authors would like to thank colleagues and staff members at WMG, University of Warwick and Jaguar Land Rover (JLR). This work was supported by WMG and Innovate UK through the WMG centre High Value Manufacturing Catapult. The engineering doctorate of the first author is jointly funded by the EPSRC , HVM Catapult and JLR .
Keywords
- Abuse testing
- Electric vehicles
- External short circuit
- Lithium-ion cells
- Nail penetration
- Safety
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering
