Will a Hot Car Battery Explode While Charging?

[McJourney]

Car battery heating up during charging will not cause an explosion. It is quite normal for a car battery to become hot while charging, as the electrolyte inside reaches a boiling state during the process. Therefore, when touched by hand, the battery naturally feels hot, and theoretically, there is no risk of explosion. However, if the battery overheats abnormally, it may lead to thermal runaway, causing the battery to swell. Such abnormal heating usually indicates severe sulfation of the car battery, which requires immediate repair. The method to repair battery sulfation is as follows: discharge the battery, pour out the original electrolyte, and then charge it with a low current while keeping the liquid temperature between 20 to 40 degrees Celsius. After completing the charging process, the sulfation issue will be resolved, and the battery capacity can generally recover to over 80%.