Patent ID: 8937400
Filing Date: 2015-01-20
Classification: B60L,B60R,Y02T

Abstract:
1. A power supply apparatus for a vehicle which supplies electric power to a power supply unit and charges electric power from the power supply unit to a main battery of an electric vehicle, a plug-in hybrid vehicle or a vehicle with electrically driven auxiliary units via a power port used for charging, wherein the vehicle includes a plurality of power inverter circuits which are connected to a common storage unit in parallel, the plurality of power inverter circuits include an electric power transferring power inverter circuit connected to the power port via an electric power transferring electric path, and are divided into a first category including the electric power transferring power inverter circuit and a second category, the power supply apparatus comprising a connection prohibiting unit which realizes a state in which the power inverter circuit included in the first category is electrically connected to the storage unit, and the power inverter circuit included in the second category is disconnected from the storage unit, the vehicle includes a rotating machine which is mechanically coupled to drive wheels, and one or more auxiliary electric loads, the plurality of power inverter circuits include a main unit power inverter circuit which is operated to control power applied to the drive wheels by the rotating machine, and at least one auxiliary unit power inverter circuit which is interposed between the one or more auxiliary electric loads and the storage unit and is operated to control the auxiliary unit, the electric power transferring power inverter circuit includes the auxiliary unit power inverter circuit, the main unit power inverter circuit is included in the second category, the connection prohibiting unit includes a first relay which opens and closes between an input terminal of the power inverter circuit included in the first category and the storage unit, and a second relay which opens and closes between an input terminal of the power inverter circuit included in the second category and the storage unit, the auxiliary unit power inverter circuits include at least one of the power inverter circuits included in the second category in addition to the electric power transferring power inverter circuit, each of the power inverter circuits included in the second category is connected to a capacitor at a side of the input terminal with respect to the second relay, and when the first relay is closed and the second relay is opened, each of the capacitors corresponding to the main unit power inverter circuit and the auxiliary unit power inverter circuit included in the second category is not charged from the electric power transferring electric path.