Patent ID: 11914001
Assignee: HYUNDAI MOTOR COMPANY
Field: Transport (Mechanical engineering)
Classification: CPC G  B  Y | IPC B  G

Claim 9:
10. An open-circuit diagnosis method for a power control device positioned between a power distribution device connected to output terminals of a first power supply and a second power supply and including a processor, the open-circuit diagnosis method comprising:
determining, by the processor, a possibility of an open-circuit fault of a vehicle power source based on a current flowing through a power control switch that selectively connects or separates main power output from the first power supply and auxiliary power output from the second power supply; and
determining, by the processor, whether it is possible to drive an electric load with an output power of the second power supply alone and determining an open-circuit position based on an output of the first power supply when there is the possibility of the open-circuit fault,
wherein the open-circuit position is between the power distribution device and the power control device or between the first power supply and the power distribution device.