Patent attributes
A vehicular power supply system includes a first power supply mounted on a vehicle, a first power supply line connected to the first power supply and disposed on one side in a width direction or a front-rear direction of the vehicle, a second power supply mounted on the vehicle, that is different from the first power supply, a second power supply line connected to the second power supply and disposed on another side in the width direction or the front-rear direction of the vehicle, a third power supply line in which one end is connected to the first power supply line and another end is connected to the second power supply line, and a power semiconductor that switches between short-circuiting and opening of the third power supply line.