BATTERY MANAGEMENT SYSTEM, BATTERY MANAGEMENT METHOD, BATTERY PACK, AND ELECTRIC VEHICLE

A battery management system according to the present disclosure includes a sensing unit to generate a sensing signal indicating a voltage and a current of a battery, a memory unit to store over-potential management information including a reference peak value and a reference peak voltage value, and a control unit to command first constant-current charging using a maximum allowable C-rate to a charging circuit when the reference peak value is equal to or larger than a threshold peak value, in response to a charge request. The control unit determines a first differential capacity curve indicating a correlation between the voltage and differential capacity of the battery in a threshold voltage range based on the sensing signal collected during the first constant-current charging. The control unit determines a first main peak value and a first main peak voltage value indicating a differential capacity and a voltage of a first peak of the first differential capacity curve, respectively. The control unit updates the reference peak value and the reference peak voltage value to be equal to the first main peak value and the first main peak voltage value, when the first main peak value is less than the threshold peak value.