A fuel cell system includes: a fuel cell unit; a temperature acquiring unit acquiring an ambient temperature of a first fuel cell stack of the fuel cell unit; and a power generation control unit. The power generation control unit is configured to, when required power for the fuel cell unit is less than a predetermined threshold value, temporarily stop power generation of the first fuel cell stack and to switch the first fuel cell stack from stopped power generation to power generation when a continuous power generation stopped time of the first fuel cell stack is greater than a predetermined time such that the continuous power generation stopped time is shorter when the ambient temperature is equal to or lower than a predetermined temperature based on a temperature at which liquid water in the first fuel cell stack freezes than when the ambient temperature is higher than the predetermined temperature.

A fuel cell system is equipped with a fuel cell unit that is composed of a plurality of fuel cells including a first fuel cell and a second fuel cell, a first supply device and a second supply device that supply reactive gas to the first fuel cell and the second fuel cell respectively, and a control device that controls running of the first fuel cell and the second fuel cell and operation of the first supply device and the second supply device. The control device suspends electric power generation by the first fuel cell and drives the first supply device to hold an opening circuit voltage of the first fuel cell within a target range, and suspends electric power generation by the second fuel cell and stops driving the second supply device when an output P required of the fuel cell unit is equal to 0.

A fuel cell having a structure for detachably mounting a cell-monitoring connector thereon includes separators arranged to be spaced apart from each other in a first direction, each of the separators including a receiving recess arranged in one side thereof, and hook-shaped gaskets respectively disposed on the separators and located around the receiving recess. The cell-monitoring connector includes a housing, at least a portion of the housing being received in a receiving space defined by the receiving recess, and connection terminals inserted into the housing to be connected to the separators. The housing includes a body inserted into the receiving space in a second direction that intersects the first direction, and a lever portion including a latching protrusion configured to be latched to or separated from a corresponding gasket among the hook-shaped gaskets by a pressing operation.

An operation control system of a fuel cell is provided. The system includes a fuel cell stack and a motor connected to the fuel cell stack via a main bus end to receive power. A booster is disposed between a load and the fuel cell stack of the main bus end to adjust an output voltage of the fuel cell stack. A high-voltage battery is connected between a load and the booster of the main bus end and a voltage sensor is connected between the booster and the fuel cell stack of the main bus end to measure an output voltage of the fuel cell stack.

The invention relates to a fuel cell stack having at least two segments of individual fuel cells arranged in parallel in terms of fluid, said segments being arranged in series relative to one another in terms of fluid. It is provided that the fuel cell stack is set up to vary the number of individual fuel cells in at least one segment.

A power generation apparatus of the present disclosure includes a power generation unit equipped with a fuel cell, an oxygen-containing gas supply unit configured to supply an oxygen-containing gas to the power generation unit, and a controller configured to control power generation by the power generation unit. The controller reduces power generation by the power generation unit when an operation status of the oxygen-containing gas supply unit satisfies a first predetermined condition and, simultaneously, temperature associated with the power generation apparatus satisfies a second predetermined condition.

According to a control method for a hybrid vehicle that is caused to run by a drive motor as a load being supplied with electric power of a battery and electric power generated by an electric generator, a total distance to empty is calculated on the basis of a shortage of a generating power output of the electric generator with respect to a required running power output and an amount of charge remaining in the battery. Specifically, a length of time for which the shortage of the generating power output of the electric generator with respect to the required running power output is covered by the amount of charge remaining in the battery is calculated, and a distance that the hybrid vehicle can run for this length of time is set as a total distance to empty.

Provided is a two-power-supply load driving fuel cell system capable of improving the durability of the fuel cell and the power efficiency of the system. Even if the variation of a load terminal voltage occurs, the variation of the output terminal of an FC can be suppressed due to the high-speed operation of an FCVCU including an SiC-FET, enabling the durability of the FC to be ensured. In addition, since IGBTs are employed in a BATVCU having large average passing power, the power loss of a fuel cell system can be reduced. It is therefore possible to construct a system that takes advantage of the characteristics of the switching elements used in the FCVCU and the BATVCU.

A fuel cell system includes a fuel cell that generates electricity using a fuel gas and air, an air supply that supplies air to the fuel cell, a temperature meter that measures a temperature of the fuel cell, and a controller. The controller controls the air supply to increase an amount of air to be supplied to the fuel cell in response to the temperature of the fuel cell exceeding one of a plurality of predetermined temperatures.

A fuel cell system includes: first and second injectors; first and second ejectors; a first circulation passage configured to circulate anode gas that has passed the first ejector between the first fuel cell and the first ejector; a second circulation passage configured to circulate the anode gas that has passed the second ejector between the second fuel cell and the second ejector; a communication passage communicating with the first and second circulation passages; a switching valve configured to switch the communication passage to a communication state where the first and second circulation passages communicate with each other or to a cutoff state where the first and second circulation passages are cut off; and a controller configured to scavenge the first fuel cell by injecting the anode gas with the first injector, while the first fuel cell stops power generation in the communication state.