| Title |
Numerical Study on Thermal Runaway by Temperatures, Appearance Sizes, and Cathode Active Materials in Cylindrical Lithium-Ion Batteries |
| Authors |
Myung Bo Gang ; Min Gyun Kim ; Nam Jin Kim |
| DOI |
https://doi.org/10.6110/KJACR.2021.33.12.633 |
| Keywords |
배터리; 리튬이온; 에너지저장장치; 열폭주; 활물질 Battery; Lithium-ion; ESS; Thermal runaway; Active material |
| Abstract |
Lithium-ion batteries for electrical vehicle and large-scale energy storage applications have developed significantly in recent years. However, as ESS fires frequently occur, the safety issue is still a major technical challenge. It has become a key factor retarding further deployment of lithium-ion batteries. Especially, thermal runaway is the key scientific problem in battery safety research. The phenomena follows a mechanism of chain reactions, during which the decomposition reaction of battery component materials occurs one after another. Therefore, in this study, we performed a numerical analysis on the thermal runaway phenomenon by oven temperatures, appearance sizes, and cathode active materials in cylindrical lithium-ion batteries using a two-dimensional analysis model. Results showed that two-dimensional simulation results were generally matched with three-dimensional simulation. Also, as Ni content, oven temperature, and appearance size increased, the thermal runaway phenomenon occurred rapidly and the thermal stability tended to be decreased. |