Overcharge and thermal destructive testing of lithium metal oxide and lithium metal phosphate batteries incorporating optical diagnostics
| Autor: | Frank Austin Mier, Caralyn A. Coultas-McKenney, Michael Hargather, Rudy Morales, Jason K. Ostanek |
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| Rok vydání: | 2017 |
| Předmět: |
Overcharge
Renewable Energy Sustainability and the Environment Chemistry Lithium iron phosphate Oxide Analytical chemistry Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Chamber pressure chemistry.chemical_compound Schlieren Destructive testing Lithium Electrical and Electronic Engineering Composite material 0210 nano-technology Short circuit |
| Zdroj: | Journal of Energy Storage. 13:378-386 |
| ISSN: | 2352-152X |
| DOI: | 10.1016/j.est.2017.08.003 |
| Popis: | Lithium batteries have a tendency to fail violently under adverse conditions leading to the rapid venting of gas. Overcharge, thermal heating, and a combination of the two conditions are applied here to investigate the gas venting process. A test chamber has been constructed with data recordings including chamber pressure and temperature, battery voltage, current, and surface temperature as functions of time throughout the charging and failure processes. High-speed imaging and schlieren flow visualization are used to visualize the gas venting process. A direct comparison between lithium iron phosphate based K2 26650 and lithium nickel manganese cobalt oxide LG 18650 cells is made through a test series of the three failure methods. Failure under thermal, overcharge, and thermal-overcharge conditions are generally similar in terms of the gas venting process, but are observed to have increasingly energetic failures. The thermal-overcharge abuse condition demonstrates an ability to reconnect via internal short circuit even after an initial electrical failure seen as the refusal to accept charge. This reconnection is associated with a secondary, more energetic failure which can produce weak shock pressure waves. |
| Databáze: | OpenAIRE |
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