At this point, the balancing FET may be configured to discharge discharging a corresponding voltage of the second measurement voltage value of the at least one cell and the balancing resistor is characterized by consuming the discharged voltage.

Here, the second reference voltage value may be greater than the first reference voltage value.

A method for preventing overvoltage of a battery, in which one or more cells are provided, includes: a first voltage measurement step for measuring a voltage of each cell; a first overvoltage determination step for comparing a first measurement voltage value of at least one cell of the one or more cells measured in the first voltage measurement step with a prescribed first reference voltage to determine whether the cell is overvoltage; a cutoff signal output step for outputting a cutoff signal for cutting off an inflow of a charge current, when the at least one cell is determined to be in overvoltage in the first overvoltage determination step; a second voltage measurement step for measuring a voltage of the at least one cell which has been determined to be in overvoltage in the first overvoltage determination step; a second overvoltage determination step for comparing a second measurement voltage value of at least one cell measured in the second voltage measurement step with a prescribed second reference voltage value to determine whether the cell is in overvoltage; a balancing FET turn-on signal output step for outputting a turn-on signal to the balancing FET, when the at least one cell is determined to be in overvoltage in the second overvoltage determination step; and an overvoltage discharge step in which a voltage of the at least one cell is discharged, the at least one cell having been determined to be in overvoltage in the second overvoltage determination step.