CHARGING-CONTROL DEVICE AND CHARGING-CONTROL METHOD

To perform charging control of a secondary battery efficiently. A charging control apparatus 1 that controls a state of charge of a secondary battery installed in a vehicle by a regulator possessed by an alternator is provided. The charging control apparatus includes a calculating unit (control part 10) that calculates an SOC indicating a state of charge of a secondary battery, a determining unit (control part 10) that performs determination of whether the SOC calculated in the calculating unit is greater than a predetermined threshold, and a controlling unit (control circuit 15) that controls the regulator in such a manner that, in a case where it is determined by the determining unit that the SOC is greater than the predetermined threshold, a power generation voltage of the alternator comes to a low state, and in a case where it is determined that the SOC is less than the predetermined threshold, a power generation voltage of the alternator comes to a high state.