Identifying the Cause of Rupture of Li-Ion Batteries during Thermal Runaway
- Univ. College London (United Kingdom). Electrochemical Innovation Lab, Department of Chemical Engineering
- NASA Johnson Space Center, Houston, TX (United States)
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Harwell Science and Innovation Campus, Didcot, Oxford (United Kingdom). Diamond Light Source
- ESRF-The European Synchrotron, Grenoble (France)
- National Physical Laboratory, Teddington, Middlesex (United Kingdom)
As the energy density of lithium-ion cells and batteries increases, controlling the outcomes of thermal runaway becomes more challenging. If the high rate of gas generation during thermal runaway is not adequately vented, commercial cell designs can rupture and explode, presenting serious safety concerns. Here, ultra-high-speed synchrotron X-ray imaging is used at >20 000 frames per second to characterize the venting processes of six different 18650 cell designs undergoing thermal runaway. For the first time, the mechanisms that lead to the most catastrophic type of cell failure, rupture, and explosion are identified and elucidated in detail. The practical application of the technique is highlighted by evaluating a novel 18650 cell design with a second vent at the base, which is shown to avoid the critical stages that lead to rupture. The insights yielded in this study shed new light on battery failure and are expected to guide the development of safer commercial cell designs.
- Research Organization:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- Grant/Contract Number:
- AC36-08GO28308
- OSTI ID:
- 1431246
- Report Number(s):
- NREL/JA--5400-71248
- Journal Information:
- Advanced Science, Journal Name: Advanced Science Journal Issue: 1 Vol. 5; ISSN 2198-3844
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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