Patent ID: 11938840
Assignee: NISSAN MOTOR CO., LTD.
Field: Transport (Mechanical engineering)
Classification: CPC B  H  Y | IPC B  H

Claim 4:
5. The control method for a fuel cell system according to claim 1, wherein:
the fuel cell system further includes a battery as a vehicle power supply, and a charging connector configured to be connected to a charging unit of an external charger,
the battery is configured to be charged by at least one of a fuel cell stack and the external charger, and
the control method further comprises:
determining whether the battery is charged by the external charger; and
in response to determining that the battery is charged by the external charger:
calculating a third energy cost required when the battery is charged to a target charge quantity by the external charger;
controlling the fuel cell to continue operation to maintain the temperature of the fuel cell at the warm-up temperature as long as a sum of the first energy cost and the third energy cost is larger than the second energy cost.