In-vehicle backup power source control apparatus and in-vehicle backup power source apparatus

An in-vehicle backup power source control apparatus that controls power supply from a power storage unit that is an in-vehicle battery, in an in-vehicle power source system that includes a power source unit and the power storage unit and in which power from the power source unit is supplied to a power supply target via a power path, the apparatus comprising:

• a first discharge unit that performs a first discharge operation of supplying a discharge current that is based on power supply from the power storage unit, to the power path via a first discharge path;
• a second discharge unit that performs a second discharge operation of supplying a discharge current that is based on power supply from the power storage unit, toward the power supply target via a second discharge path that is different from the first discharge path;
• a first control unit that causes the first discharge unit to perform the first discharge operation when power supply that is based on the power source unit enters a failure state;
• and
• a second control unit that causes the second discharge unit to perform the second discharge operation when power supply that is based on the power source unit enters the failure state and at least the first discharge operation that is performed by the first discharge unit is in an abnormal state,
• wherein a switch unit that switches between an on-state and an off-state is provided on the power path on the power supply target side relative to a connection portion of the first discharge path,
• the switch unit permits power supply from the power source unit side to the power supply target side in the on-state, and shuts off power supply from the power source unit side to the power supply target side in the off-state,
• the second discharge path is electrically connected on the power supply target side relative to the switch unit on the power path, and
• when power supply that is based on the power source unit enters the failure state and at least the first discharge operation that is performed by the first discharge unit is in the abnormal state, the second control unit switches the switch unit to the off-state.