A method of operating an aircraft includes providing a fuel cell system to power the aircraft, providing an airflow path through the fuel cell system, sensing a change mass air flow rate supplied to a compressor of the fuel cell system, and at least one of adjusting a restriction of airflow entering the airflow path in response to the sensed change in mass air flow rate, adjusting a restriction of airflow exiting the airflow path in response to the sensed change in mass air flow rate, and adjusting an air scoop to gather a different amount of air into the airflow path. A method of operating an aircraft includes sensing a change in ambient pressure supplied to an airflow path and adjusting a restriction of airflow exiting the airflow path in response to a sensed change in ambient pressure.

A fuel cell vehicle includes: a fuel cell; a storage portion to store produced water that is produced as a result of power generation by the fuel cell; a drainage valve for switching between a storage state and a drainage state of discharging the produced water from the storage portion to the outside of the fuel cell vehicle; a road information acquisition portion configured to acquire road information on roads on which the fuel cell vehicle travels; and a controller configured to drainage valve control operation. The controller sets a road region meeting a first condition defined in advance regarding road information and that permits the drainage state as a first road region where the drainage state is permitted, and the controller performs drainage if a drainage implementation condition defined in advance, including traveling of the fuel cell vehicle in the first road region, is fulfilled.

A fuel cell vehicle includes: a fuel cell; a storage portion to store produced water that is produced as a result of power generation by the fuel cell; a drainage valve for switching between a storage state and a drainage state of discharging the produced water from the storage portion to the outside of the fuel cell vehicle; a road information acquisition portion configured to acquire road information on roads on which the fuel cell vehicle travels; and a controller configured to drainage valve control operation. The controller sets a road region meeting a first condition defined in advance regarding road information and that permits the drainage state as a first road region where the drainage state is permitted, and the controller performs drainage if a drainage implementation condition defined in advance, including traveling of the fuel cell vehicle in the first road region, is fulfilled.

A fuel cell recovery control system and method are provided to supply hydrogen to the cathode of a fuel cell stack to remove an oxide film formed on a platinum surface of the cathode. The performance of the fuel cell stack is recovered in accordance with the oxide film removal. In addition, electric power generated during the performance recovery of the fuel cell stack is consumed in an inverter and, as such, overcharge of a battery is prevented.

A charging apparatus is applied to a new energy vehicle. The new energy vehicle includes a first battery and a second battery. The first battery provides driving power for the new energy vehicle, and the second battery supplies power to a vehicle-mounted load device. The apparatus includes a charging unit and a general-purpose unit. The charging unit includes a DC-DC circuit and a BMS. The general-purpose unit includes a control module, a communication module, and an auxiliary power supply module. The auxiliary power supply module supplies power to the charging unit and the control module. The control module is configured to control the charging unit to provide electric energy of the first battery to the second battery. According to the apparatus provided in this application, a volume and a weight of the charging apparatus can be reduced, a service life of a battery can be prolonged.

The present disclosure provides a system and a method for guiding hydrogen charging, which may estimate a remaining hydrogen chargeable amount (remaining hydrogen storage amount), a charging time, and the like of a hydrogen charging station, and provide the estimated information to another vehicle to be charged through an Internet network when a driver charges hydrogen in a hydrogen tank of his/her fuel cell vehicle at the hydrogen charging station, such that the driver of the vehicle to be charged may recognize a maximum chargeable amount and a required charging time for a hydrogen tank of a vehicle to be charged for each hydrogen charging station, thereby allowing the fuel cell vehicles to visit the hydrogen charging station and smoothly charge hydrogen.

The present disclosure provides a system and a method for guiding hydrogen charging, which may estimate a remaining hydrogen chargeable amount (remaining hydrogen storage amount), a charging time, and the like of a hydrogen charging station, and provide the estimated information to another vehicle to be charged through an Internet network when a driver charges hydrogen in a hydrogen tank of his/her fuel cell vehicle at the hydrogen charging station, such that the driver of the vehicle to be charged may recognize a maximum chargeable amount and a required charging time for a hydrogen tank of a vehicle to be charged for each hydrogen charging station, thereby allowing the fuel cell vehicles to visit the hydrogen charging station and smoothly charge hydrogen.

A method of correcting error of hydrogen pressure sensor of vehicle fuel cell system, may checking, whether an opening ratio of a hydrogen pressure regulation valve is in a normal range by use of data map; checking whether a hydrogen purge valve is opened when the opening ratio of the hydrogen pressure valve is not within the normal range; changing the opening ratio of the hydrogen pressure regulation valve at least one time when the hydrogen purge valve is determined as being opened, and detecting two or more measurement values of the hydrogen pressure sensor at two or more different opening ratios of the hydrogen pressure regulation valve; and comparing, the two or more measurement values of the hydrogen pressure sensor detected at the two more opening ratios, respectively with predetermined pressure values corresponding to the opening ratios, and correcting errors between the measurement values and the predetermined pressure values.

A method of correcting error of hydrogen pressure sensor of vehicle fuel cell system, may checking, whether an opening ratio of a hydrogen pressure regulation valve is in a normal range by use of data map; checking whether a hydrogen purge valve is opened when the opening ratio of the hydrogen pressure valve is not within the normal range; changing the opening ratio of the hydrogen pressure regulation valve at least one time when the hydrogen purge valve is determined as being opened, and detecting two or more measurement values of the hydrogen pressure sensor at two or more different opening ratios of the hydrogen pressure regulation valve; and comparing, the two or more measurement values of the hydrogen pressure sensor detected at the two more opening ratios, respectively with predetermined pressure values corresponding to the opening ratios, and correcting errors between the measurement values and the predetermined pressure values.

A fuel cell stack formed by stacking a plurality of power generation cells together in a vehicle width direction and a voltage control unit including a voltage controller and a control case are mounted in a front box of a fuel cell vehicle. The control case is joined to a stack case in a manner that the control case is provided adjacent to the stack case in a direction perpendicular to the stacking direction of the plurality of power generation cells. A cell voltage detection unit is provided between the fuel cell stack and a voltage control unit.