Abstract: The power supply system includes: a fuel cell, capable of generating power; a power storage device, storing power generated by the fuel cell; and a control device, controlling at least the fuel cell. The control device, under a tendency that power consumption of a load at least connected with the fuel cell and the power storage device decreases, determines a first lower limit power based on power generated by the fuel cell before a predetermined time, causes the fuel cell to generate second power equal to or greater than the first lower limit power when first power generated by the fuel cell determined based on a power supplied to the load drops below the first lower limit power, and determines the first lower limit power with a tendency that the greater the generated power, the greater a difference between the generated power and the first lower limit power is increased.

Abstract: An ECU of a fuel cell system determines whether or not temperature information exceeds a temperature threshold for determination when receiving a signal related to power generation stop of a fuel cell stack during operation of a moving body. When the temperature information exceeds the determination temperature threshold, the ECU performs a stop control for stopping power generation of the fuel cell stack. On the other hand, when the temperature information is equal to or lower than the determination temperature threshold, the ECU performs an idle control for generating electric power smaller than electric power consumed by the air pump.

Abstract: A fuel cell system includes a fuel cell and a secondary battery used as power sources of a power supply target object, and a control device for controlling driving of the power supply target object. The control device determines whether a predetermined condition required for activation of the fuel cell is satisfied, permits a battery-driven mode in which the power supply target object is driven using only the secondary battery when the predetermined condition is satisfied, and prohibits the battery-driven mode when the predetermined condition is not satisfied.

Abstract: A control unit of a fuel cell system measures or estimates an amount of nitrogen in an anode flow field, performs a first comparison by comparing the amount of nitrogen with the first threshold amount, performs a second comparison by comparing a differential pressure calculated by subtracting a cathode pressure value indicating a pressure inside a cathode flow field from an anode pressure value indicating a pressure inside the anode flow field with the second threshold pressure when the amount of nitrogen in the anode flow field is greater than the first threshold amount in the first comparison, and controls opening and closing of a valve based on the result of the first comparison and the result of the second comparison.

Abstract: A control unit of a fuel cell system opens a second valve at the time of closing a first valve, and maintains the same operating state of a compressor before closing the first valve and after opening the second valve.

Abstract: A control unit of a fuel cell system estimates an amount of nitrogen in an anode flow field, performs a first comparison by comparing the estimated amount of nitrogen with a first threshold amount, performs a second comparison by comparing a target power generation amount as a target amount of power generation by a fuel cell stack with a second threshold amount in a case where the estimated amount of nitrogen in the anode flow field exceeds the first threshold amount in the first comparison, and controls opening and closing of a first valve and opening and closing of the second valve based on a result of the first comparison and a result of the second comparison.

Abstract: A control unit estimates a discharged fuel gas amount, i.e., an amount of fuel gas discharged from the outlet of a cathode flow field, of a fuel exhaust gas introduced from a communication flow path to the inlet of the cathode flow field and then flowing through a cathode. The control unit calculates an oxygen-containing gas amount necessary for dilution at the time of discharge into the atmosphere, from the estimated discharged fuel gas amount, and sets a discharge amount of the air pump, based on the calculated oxygen-containing gas amount.

Abstract: A fuel cell system performs a first control of stopping power generation of a fuel cell stack by closing a supply-side stop valve during power generation of the fuel cell stack, and a second control of driving an air pump by using surplus power generated in a moving body to thereby discard the surplus power. If a closed state of the supply-side stop valve is detected when the first control and the second control start to be executed, the air pump is driven in a predetermined state.

Abstract: When controlling the power generation state of a fuel cell stack based on a generated current command value, a control device sets the generated current command value based on a generated power command value and a generated voltage acquired by a voltage sensor such that the following expression is satisfied, regardless of whether a bleed valve is opened or closed: generated current command value=generated power command value/generated voltage.

Abstract: A control unit estimates a discharged fuel gas amount, i.e., an amount of fuel gas discharged from the outlet of a cathode flow field, of a fuel exhaust gas introduced from a communication flow path to the inlet of the cathode flow field and then flowing through a cathode. The control unit calculates an oxygen-containing gas amount necessary for dilution at the time of discharge into the atmosphere, from the estimated discharged fuel gas amount, and sets a discharge amount of the air pump, based on the calculated oxygen-containing gas amount.

Abstract: An ECU of a fuel cell system determines whether or not temperature information exceeds a temperature threshold for determination when receiving a signal related to power generation stop of a fuel cell stack during operation of a moving body. When the temperature information exceeds the determination temperature threshold, the ECU performs a stop control for stopping power generation of the fuel cell stack. On the other hand, when the temperature information is equal to or lower than the determination temperature threshold, the ECU performs an idle control for generating electric power smaller than electric power consumed by the air pump.

Abstract: The power supply system includes: a fuel cell, capable of generating power; a power storage device, storing power generated by the fuel cell; and a control device, controlling at least the fuel cell. The control device, under a tendency that power consumption of a load at least connected with the fuel cell and the power storage device decreases, determines a first lower limit power based on power generated by the fuel cell before a predetermined time, causes the fuel cell to generate second power equal to or greater than the first lower limit power when first power generated by the fuel cell determined based on a power supplied to the load drops below the first lower limit power, and determines the first lower limit power with a tendency that the greater the generated power, the greater a difference between the generated power and the first lower limit power is increased.

Abstract: A drive upper limit electrical energy for an air compressor is set variably in correspondence with vehicle velocity Vv. In this manner, for example, surplus power generation electrical energy of a fuel cell stack is consumed (discarded) by the air compressor in a range where NV (noise and vibration) of the air compressor does not give passengers any sense of discomfort.

Abstract: A fuel cell system includes a FC, a TRC, an oxygen-containing gas supply apparatus, a battery, and an ECU. The ECU is capable of performing power consumption control which allows the oxygen-containing gas supply apparatus to consume electrical energy during regeneration of the TRC. The ECU is configured to determine a charge margin with respect to a charge limitation value of the battery, in a manner that the charge margin set after the power consumption control starts becomes smaller than the charge margin set before the power consumption control is performed.

Abstract: A fuel cell system includes a fuel gas leakage sensor provided in a housing chamber to detect leakage of a fuel gas from a fuel cell to an inside of a housing chamber. Circuitry is configured to close at least one of a first valve and a second valve when the fuel gas leakage sensor detects the leakage of the fuel gas. The circuitry is configured to control the fuel cell to generate electric power using the fuel gas in the fuel cell while the at least one of the first valve device and the second valve device is closed when the fuel gas leakage sensor detects the leakage of the fuel gas.

Abstract: A fuel cell vehicle includes a fuel cell, a first electric component, a second electric component, a battery, a first switch, a second switch, and circuitry. The first electric component is to operate the fuel cell. The second electric component is not to be used to operate the fuel cell. The first switch is to electrically connect the first electric component to the battery to supply electric power from the battery to the first electric component. The second switch is to electrically connect the second electric component to the battery to supply electric power from the battery to the second electric component. The circuitry is configured to control the first switch to electrically connect the first electric component to the battery and to control the second switch not to electrically connect the second electric component to the battery when the fuel cell is started.

Abstract: A fuel cell system includes a FC, a TRC, an oxygen-containing gas supply apparatus, a battery, and an ECU. The ECU is capable of performing power consumption control which allows the oxygen-containing gas supply apparatus to consume electrical energy during regeneration of the TRC. The ECU is configured to determine a charge margin with respect to a charge limitation value of the battery, in a manner that the charge margin set after the power consumption control starts becomes smaller than the charge margin set before the power consumption control is performed.

Abstract: A drive upper limit electrical energy for an air compressor is set variably in correspondence with vehicle velocity Vv. In this manner, for example, surplus power generation electrical energy of a fuel cell stack is consumed (discarded) by the air compressor in a range where NV (noise and vibration) of the air compressor does not give passengers any sense of discomfort.

Abstract: A fuel cell vehicle includes a lid, a switch, a sensor, and circuitry. The lid opens and closes a fuel inlet through which fuel gas is to be supplied to a tank. The switch takes an opening position to open the lid and a closing position to close the lid. The sensor detects whether the lid opens or closes the fuel inlet. The circuitry is configured to prohibit the fuel cell vehicle from travelling when the sensor detects that the lid opens the fuel inlet while the switch takes the opening position.

Abstract: A fuel cell vehicle includes a fuel cell, a first electric component, a second electric component, a battery, a first switch, a second switch, and circuitry. The first electric component is to operate the fuel cell. The second electric component is not to be used to operate the fuel cell. The first switch is to electrically connect the first electric component to the battery to supply electric power from the battery to the first electric component. The second switch is to electrically connect the second electric component to the battery to supply electric power from the battery to the second electric component. The circuitry is configured to control the first switch to electrically connect the first electric component to the battery and to control the second switch not to electrically connect the second electric component to the battery when the fuel cell is started.