Power supply device for vehicle

The invention provides a power supply device for a vehicle that can prevent a capacitor discharged on a path in which a power supply provided inside a vehicle and a charging port of a direct current power source are connected. The power supply device is provided with components of a quick charging port (9) which is connected with the direct current power source (10); capacitors (31,32,33) connected between the positive pole and the negative pole of the quick charging port (9); an electrical load (4) connected to the power source (51); a first switch (11) that turns on and off a path connectingthe positive pole of the quick charging port (9) to the capacitors (31,32,33); and a second switch (12) which turns on and off a path for connecting a negative electrode of the quick charging port (9) to the capacitors (31,32,33), wherein the capacitors (31,32,33), the first switch (11), and the second switch (12) are connected in parallel to the electric load (4). 提供能够防止设置在车辆内部的电源与直流电源的充电口连接的路径上的电容器放电的车辆用电源装置。具备：快速充电口(9