Power supply circuit protection device

A power circuit protection device for a vehicle, the vehicle comprising a power storage device used as a driving power source for the vehicle, a drive motor to receive a supply of electricity stored in the power storage device, and a charging terminal to charge the power storage device, the power circuit protection device comprising:

• a relaying device for alternatively forming a first circuit that connects the power storage device and the driving motor, and a second circuit that connects the power storage device and the charging terminal;
• a fuse device interposed between the power storage device and the relaying device, the fuse device comprising:
• a first fuse;
• a second fuse;
• and
• a switching mechanism for switching a connection destination of the power storage device between the first fuse and the second fuse in an alternative manner;
• and
• a control device for controlling the relaying device and the fuse device, the control device being configured to control the switching mechanism such that the second fuse is connected to the power storage device when the control device controls the relaying device so that the second circuit is connected to the control device upon receiving a predetermined charging request, and
• wherein a time until the second fuse is blown under a predetermined current condition is longer than a time until the first fuse is blown under the same current condition.