ELECTRIC POWER SUPPLYING DEVICE

An electric power supplying device including: a first sensing section that senses a first output current from a first DCDC converter provided between a high-voltage system and an auxiliary device system; a second sensing section that senses a second output current from a second DCDC converter provided between the high-voltage system and the auxiliary device system; a third sensing section that senses a third output current from an auxiliary device battery connected to the auxiliary device system; and a control section that controls output of the second DCDC converter on the basis of results of sensing of output currents by the first sensing section, the second sensing section and the third sensing section.