Impacts of External Short Circuit on Lithium-ion Battery Performance under Different Duration Time

External short circuit (ESC) is one of the most ubiquitous faults that may occur during the battery utilization in electric vehicles (EVs). ESC causes the high temperature rise and may destroy the battery if it lasts long enough. However, the damage generation characters between the ESC occurrence and the battery destruction are not clear. In this study, the ESC characters under the varying duration time and the damage impacts are investigated. A novel experimental study on the ESC with incremental duration is proposed and the damage effects are analyzed via the changes of the battery characters, Secondly, the battery destruction is proved to be abruptly generated right after a critical time. The electrochemical mechanism implied with critical time is analyzed. Finally, the curved surface of the ESC critical time against the varying battery working conditions is disclosed.