Investigation on the heat generation and heat sources of cylindrical NCM811 lithium-ion batteries

Experimental and simulation investigation on suppressing thermal runaway in battery pack

“…The direct cause of overcharging is the failure of the battery management system (BMS) protection measures to promptly cut off the charging current when the power battery is fully charged, resulting in charging beyond the capacity of the power battery. Overcharging typically results in heating and gas generation, primarily stemming from Ohmic heat and side reaction heat 14 , 15 . Research has found that the heat generated by batteries is directly proportional to the charging current, indicating that ohmic heat is one of the main reasons for heat generation during the charging process.…”