Abstract: A controller for a fuel cell system controls generated power of a fuel cell stack by switching a generation state of the fuel cell stack based on a state of charge of a power storage device. The generation state includes a first generation state, in which the fuel cell stack is caused to generate a first generated power, a second generation state, in which the fuel cell stack is caused to generate a second generated power greater than the first generated power, and a third generation state, in which the fuel cell stack is caused to generate a third generated power greater than the second generated power. The controller calculates a power reference value indicating an actual result of power generation of the fuel cell stack from the detected generated power of the fuel cell stack, and updates the second generated power based on the power reference value.

Abstract: The present disclosure stabilizes power generation of a fuel cell stack in an environment in which an oxygen concentration in a fuel cell system readily decreases. In a case where it is detected that the oxygen concentration is lower than a predetermined concentration or where a phenomenon caused by the oxygen concentration being lower than the predetermined concentration is detected, processing to increase a flow rate of air supplied to the fuel cell stack or processing to ventilate the interior of the fuel cell stack by controlling an operation of a ventilation unit is performed.

Abstract: A forklift includes a fuel cell system. The fuel cell system includes a battery stack and a capacitor and is electrically connected to a vehicle system. The vehicle system includes a control valve that switches supply of hydraulic oil to a power steering cylinder and a cargo-handling cylinder, a cargo-handling pump that supplies hydraulic oil stored in a hydraulic oil tank to the control valve, a cargo-handling motor that drives the cargo-handling pump, and an on-load valve that returns the hydraulic oil from the control valve to the hydraulic oil tank. The fuel cell system operates the fuel cell system to execute a warm-up control. A vehicle ECU continues supplying power from the fuel cell stack to the cargo-handling motor during the execution of the warm-up control.

Abstract: A forklift includes a fuel cell system. The fuel cell system includes a battery stack and a capacitor and is electrically connected to a vehicle system. The vehicle system includes a control valve that switches supply of hydraulic oil to a power steering cylinder and a cargo-handling cylinder, a cargo-handling pump that supplies hydraulic oil stored in a hydraulic oil tank to the control valve, a cargo-handling motor that drives the cargo-handling pump, and an on-load valve that returns the hydraulic oil from the control valve to the hydraulic oil tank. The fuel cell system operates the fuel cell system to execute a warm-up control. A vehicle ECU continues supplying power from the fuel cell stack to the cargo-handling motor during the execution of the warm-up control.

Abstract: A fuel cell vehicle includes a fuel cell stack, which is connected to an in-vehicle electric load, a power storage device, which is connected to the fuel cell stack so as to be connected in parallel to the in-vehicle electric load, a state-of-charge sensor, which detects a state of charge of the power storage device, and circuitry that controls the power generated by the fuel cell stack based on the detected state of charge of the power storage device. The in-vehicle electric load includes a driving motor, which is driven based on operation of an operating member. When the state of charge of the power storage device detected by the state-of-charge sensor falls to or below a threshold value, the circuitry executes a restriction process to apply restriction on driving of the driving motor.

Abstract: A fuel cell vehicle includes a fuel cell stack, which is connected to an in-vehicle electric load, a power storage device, which is connected to the fuel cell stack so as to be connected in parallel to the in-vehicle electric load, a state-of-charge sensor, which detects a state of charge of the power storage device, and circuitry that controls the power generated by the fuel cell stack based on the detected state of charge of the power storage device. The in-vehicle electric load includes a driving motor, which is driven based on operation of an operating member. When the state of charge of the power storage device detected by the state-of-charge sensor falls to or below a threshold value, the circuitry executes a restriction process to apply restriction on driving of the driving motor.

Abstract: A fuel cell vehicle includes an in-vehicle electric load, a fuel cell stack, which is electrically connected to the in-vehicle electric load, a power storage device, which is electrically connected to the fuel cell stack so as to be electrically connected in parallel to the in-vehicle electric load, a state-of-charge sensor, which is configured to detect a state of charge of the power storage device, and circuitry that is configured to switch, in multiple stages, a power generated by the fuel cell stack based on the state of charge of the power storage device detected by the state-of-charge sensor. The circuitry is configured to set, at least at one of the multiple stages, a power generation command value in accordance with selected one of a plurality of operation modes that have different power generation command values.