Secure power source structure for startup of electric power supply device

A starting power securing structure of an electric power supply device which includes an electric power invert portion that performs a DC/AC invert of the electric power supplied from an electric vehicle via a first power cable provided with a first connection plug connectable to a charging connector of the electric vehicle and lowers a voltage of the electric power, and an electric power output portion that outputs the electric power subjected to the DC/AC invert and the voltage drop to an outside, the structure comprising:

• a built-in battery mounted on the electric power supply device and configured to store an electric power;
• an operation control portion provided in the electric power supply device and configured to control an operation of the electric power invert portion;
• and
• a discharging control portion provided in the electric vehicle and configured to control a discharging of a driving battery mounted on the electric vehicle to the charging connector,
• wherein the built-in battery is configured to supply the electric power stored in the built-in battery to the operation control portion and the first connection plug in a state of being electrically connected to the operation control portion and the first connection plug, whereby the electric power is supplied to the discharging control portion via the first connection plug, the electric power invert portion become performable so that the electric power can be transmitted from the electric vehicle to the electric power supply device.