IN-VEHICLE POWER SUPPLY DEVICE

摘要

Provided is an in-vehicle power supply device which suppresses decrease of the supply voltage to a first load caused by the electric current to a second load. According to the present invention, a first wiring line connects the first load and a main electricity storage device with each other; a second wiring line connects the first load and a sub electricity storage device with each other; the resistance of the second wiring line is lower than the resistance of the first wiring line; a third wiring line connects the second load and the main electricity storage device with each other; a fourth wiring line connects the second load and the sub electricity storage device with each other; and the resistance of the fourth wiring line is higher than the resistance of the third wiring line.