A method for battery management, comprising steps in the following order: measuring, by an auxiliary control unit and independently by a main control unit, a voltage value of a battery cell included in a battery pack, outputting, by the auxiliary control unit, a signal for melting a fuse via a first line electrically connecting the auxiliary control unit to a first node when the voltage value measured by the auxiliary control unit is higher than a preset first reference voltage value, the signal having a current value enough to melt the fuse; determining (S309a), by the main control unit, whether the signal to melt the fuse is received from the auxiliary control unit via a second line, the second line being branched off from the first line at the first node, the second line connecting the main control unit to the first node; if the signal to melt the fuse is received from the auxiliary control unit, determining (S309b), by the main control unit, whether the voltage value measured by the main control unit is higher than a preset second reference voltage value; if the voltage value measured by the main control unit is higher than a preset second reference voltage value, turning on, by the main control unit, a fuse switch to allow the signal to melt the fuse outputted from the auxiliary control unit to flow into the fuse, the fuse switch being provided between the first node and the fuse; if the voltage value measured by the main control unit is not higher than a preset second reference voltage value, outputting, by the main control unit, a malfunction signal indicating that the auxiliary control unit has malfunctioned. measuring, by an auxiliary control unit and independently by a main control unit, a voltage value of a battery cell included in a battery pack, outputting, by the auxiliary control unit, a signal for melting a fuse via a first line electrically connecting the auxiliary control unit to a first node when the voltage value measured by the auxiliary control unit is higher than a preset first reference voltage value, the signal having a current value enough to melt the fuse; determining (S309a), by the main control unit, whether the signal to melt the fuse is received from the auxiliary control unit via a second line, the second line being branched off from the first line at the first node, the second line connecting the main control unit to the first node; if the signal to melt the fuse is received from the auxiliary control unit, determining (S309b), by the main control unit, whether the voltage value measured by the main control unit is higher than a preset second reference voltage value; if the voltage value measured by the main control unit is higher than a preset second reference voltage value, turning on, by the main control unit, a fuse switch to allow the signal to melt the fuse outputted from the auxiliary control unit to flow into the fuse, the fuse switch being provided between the first node and the fuse; if the voltage value measured by the main control unit is not higher than a preset second reference voltage value, outputting, by the main control unit, a malfunction signal indicating that the auxiliary control unit has malfunctioned.