Power supply control apparatus and electric discharge method

A power supply control apparatus that controls a power supply, the power supply having

• a fuel cell,
• a gas supply unit configured to supply oxidant gas to the fuel cell, and
• a power converter having a plurality of switching elements and configured to convert electric power output from the fuel cell,
• the power supply control apparatus comprising:
• a switching control device configured to switch each of the plurality of switching elements between an on state and an off state alternately;
• and
• a discharge control device configured to, when residual charge remaining in the fuel cell is being discharged,
• control the gas supply unit such that the oxidant gas is not supplied to the fuel cell,
• in a first period, control the switching control device such that an on time that is a time during which at least one switching element of the plurality of switching elements is maintained in the on state is longer than the on time allowed to be taken during an operation of the fuel cell and the at least one switching element is switched between the on state and the off state alternately, and
• in a second period subsequent to the first period, control the switching control device such that the at least one switching element continues to maintain the on state.