Apparatus and method for controlling power of vehicle

An apparatus for controlling power of a vehicle, the apparatus comprising:

• a first load and a second load;
• a first power supply supplying power to at least one of the first load and the second load from a main battery;
• a second power supply supplying power to at least one of the first load and the second load from an auxiliary battery supplied with and charged by the power from the main battery;
• a switch set including a plurality of switches intermitting lines between the first load, the second load, the first power supply, and the second power supply;
• and
• a power controller checking a state of the vehicle and controlling a turn-on or a turn-off for the plurality of switches in response to the checked state of the vehicle,
• wherein in response to the checked state that an engine state of the vehicle is an engine cranking state, the power controller separates the first power supply and the second power supply from each other and controls the switches so that the power of the first power supply is supplied to the second load and the power of the second power supply is supplied to the first load.

A method for controlling power of a vehicle, the method comprising:

• checking a state of the vehicle;
• and
• controlling a turn-on or a turn-off for a plurality of switches intermitting lines between a first power supply supplying power to at least one of a first load and a second load from the first load, the second load, and a main battery in response to the checked state of the vehicle, and a second power supply supplying power to at least one of the first load and the second load from an auxiliary battery supplied with and charged by the power from the main battery,
• wherein the controlling of the turn-on or the turn-off for the plurality of switches includes:
• when a fault occurs in the auxiliary battery, separating the second power supply from the first load and the second load, and controlling the plurality of switches so that the power of the second power supply is blocked from being supplied to the first load and the second load.