Power supply device for vehicle

摘要

A power supply device includes a refrigeration cycle having a compressor, a motor, an inverter-integrated charger, a heat exchanger unit, and a controller having a determining unit. The inverter-integrated charger selectively controls operation of the motor using electrical power of a battery and charge of the battery with external power. The heat exchanger unit cools a cooling-necessary part of the inverter-integrated charger using refrigerant in the refrigeration cycle. When the vehicle is stopped and the battery is charged with the external power, the controller makes the inverter-integrated charger serve as: a charger to perform the charge of the battery; or an inverter to control the operation of the motor, thereby driving the compressor, upon determination that the cooling-necessary part needs to be cooled by the determining unit.

主权项

1. A power supply device adapted to be disposed in a vehicle having a battery, the power supply device comprising:
a refrigeration cycle for air conditioning that includes a compressor, a condenser, an expansion valve, and an evaporator; a motor that is configured to drive the compressor; an inverter-integrated charger that is configured to selectively control operation of the motor using electrical power of the battery and charge of the battery with external power; a heat exchanger unit that is disposed in the refrigeration cycle and configured to cool a cooling-necessary part of the inverter-integrated charger using refrigerant in the refrigeration cycle, wherein the heat exchanger unit is a refrigerant reservoir portion in which liquid-phase refrigerant in the refrigeration cycle is stored; a controller that is configured to control operation of the inverter-integrated charger and that includes a determining means for determining whether the cooling-necessary part needs to be cooled, wherein when a traveling function of the vehicle is stopped and the battery is charged with the external power, the controller makes the inverter-integrated charger serve as: a charger to perform the charge of the battery, or an inverter to control the operation of the motor, thereby driving the compressor, upon determination that the cooling-necessary part needs to be cooled by the determining means; and a second level detecting unit that is configured to detect a level of liquid-phase refrigerant stored in the refrigerant reservoir portion, wherein the controller stops the drive of the compressor and makes the inverter-integrated charger serve as the charger to perform the charge of the battery when the level of liquid-phase refrigerant becomes equal to or higher than a second predetermined level.