Battery management system and driving method thereof

A battery management system, comprising:

• a sensing unit for measuring a cell voltage and a cell current of each of a plurality of battery cells;
• a Main Control Unit (MCU) for measuring a State Of Charge (SOC) of each of the battery cells by using the cell voltage and the cell current of each of the battery cells and transmitting a battery cell control signal for controlling charge and discharge;
• and
• a cell balancing unit for balancing the battery cells according to the battery cell control signal,
• wherein the MCU comprises:
• a cell balancing discharge amount measurement unit for measuring a cell balancing discharge amount of each of the battery cells;
• and
• a controller for comparing a difference value between a maximum value among the cell balancing discharge amounts of the battery cells and each of the cell balancing discharge amounts to determine a short battery cell in which the difference value is greater than a reference value from among the battery cells.