| abstract |
A power supply device for a vehicle suppresses an overcurrent from flowing through a switch when the switch is switched by providing redundancy and suppressing a voltage difference between batteries. A power supply device (S) for a vehicle, comprising: a first power storage device (50A) having a first power storage element (53A), a second power storage device (50B) having a second power storage element (53B), A state in which the first power storage device (50A) is connected in parallel to the second power storage device (50B) and a state in which the first power storage device (50A) is disconnected from the second power storage device (50B) A switch (SW1) for switching between them, and a switch control unit (70), the above-mentioned first power storage element (53A) and the above-mentioned second power storage element (53B) are power storage devices having a flat region in the SOC-OCV characteristic device, the switch control unit (70) performs switching of the switch (SW1) from off to Open toggle. |