To provide a fuel cell system configured to reduce the drying of the inside of the fuel cell stack and increase the power generation performance of the fuel cell stack by reducing a circulation gas flow rate during high temperature operation. Disclosed is a fuel cell system comprising: a fuel cell stack, an ejector, a first injector which supplies fuel gas to the ejector, a second injector which has a smaller fuel gas injection amount than the first injector and which supplies the fuel gas to the ejector, a third injector which supplies the fuel gas to fuel electrodes of the fuel cell stack, a fuel gas supplier, a first supply flow path, a second supply flow path which enables the supply of the fuel gas from the third injector to the fuel electrodes of the fuel cell stack, a circulation flow path, a temperature detector, and a controller.

A fuel cell system includes a fuel cell stack, an oxidizing gas supply system, a fuel gas supply system, a current control circuit configured to control an output current of the fuel cell stack, a control unit configured to control power generation of the fuel cell stack, and the output current of the current control circuit, the control unit controlling the current control circuit to adjust the output current thereby adjusting a heating value of the fuel cell stack; and a monitoring unit configured to monitor abnormal fuel gas generation, the abnormal fuel gas generation corresponding to a state where the fuel gas in excess of a predetermined allowable amount exists in the cathode. When the monitoring unit detects the abnormal fuel gas generation during execution of a warm-up operation to allow the fuel cell stack to generate heat with a predetermined target heating value, the control unit reduces the output current by reducing the target heating value.

A system includes an electrical storage device that stores an electric power generated by a fuel cell, an electric load to which the electric power is supplied using the electric power of the fuel cell and/or the electrical storage device, and an electric power control part that controls supply of the electric power to the electric load, and the electric power control part performs warming-up control of the fuel cell when an electric power requested to be generated at the fuel cell is less than a predetermined value, and causes the fuel cell to generate an electric power that is greater than the electric power requested to be generated at the fuel cell and causes to store excess electric power in the electrical storage device when the electric power requested to be generated at the fuel cell is equal to or greater than the predetermined value.

A fuel cell system includes: a plurality of fuel cell units of which each includes a fuel cell, an air supply pipe, an air supply device, an air discharge pipe, and a control unit; and an exhaust pipe connected to the plurality of air discharge pipes and configured to discharge exhaust gas to the outside of the fuel cell system. The control units of the plurality of fuel cell units are configured such that, when one or more fuel cell units included in the plurality of fuel cell units are operating to generate electric power and each of the remainder of the plurality of fuel cell units is not operating to generate electric power, the control unit of the fuel cell unit that is not operating to generate electric power activates the air supply device of the corresponding fuel cell unit.

The power system includes a fuel cell stack, a system accessory, a battery, and a control device. The control device executes, based on a state of a vehicle and the battery, one of the following processes: a normal power generation process during which the control device makes a net output greater than 0; a first idling stop process during which the control device makes the net output equal to or less than 0 while continuing operation of the system accessory and power generation by the stack; a second idling stop process during which the control device makes the net output less than 0 by stopping the power generation while continuing the operation of the system accessory; and a third idling atop process during which the control device makes the net output equal to 0, by stopping both the operation of the system accessory and the power generation.

Introduced is an fuel cell power net including a fuel cell configured to generate power through a reaction between a fuel gas and an oxidizing gas, a power storage device configured to be charged with power generated by the fuel cell or discharged to supply power, a main line configured to electrically connect the fuel cell and the power storage device to each other; a main relay disposed on the main line so as to break or make an electrical connection between the fuel cell and the power storage device, a bypass line which is branched from the main line, bypasses the main relay, and is connected to the power storage device, a bypass relay disposed on the bypass line so as to break or make an electrical connection of the bypass line, and a controller configured to control the main relay or the bypass relay such that the power stored in the storage device is supplied to the fuel cell while the power generation of the fuel cell is stopped.

A vehicle includes a drive battery unit including a battery unit case, a pair of left and right battery side frames, and a plurality of fixing members. The drive battery unit is fixed to the vehicle. The battery unit case includes a left side wall and a right side wall. One of the pair of left and right battery side frames is disposed on a left side of the left side wall of the battery unit case. Another of the pair of left and right battery side frames is disposed on a right side of the right side wall of the battery unit case. Each of the fixing members is fixed to the pair of left and right battery side frames, and a length of each of the fixing members in the front-rear direction is longer than a length thereof in the vehicle width direction.

A fuel cell vehicle includes a fuel cell and a junction box. The fuel cell includes at least one cell stack including a plurality of unit cells in a stacked configuration, heaters disposed at end portions of the at least one cell stack, current collectors disposed at the end portions of the at least one cell stack, a terminal block electrically connecting the current collectors and the heaters to the junction box, a positive bus bar and a negative bus bar electrically connecting the current collectors to the terminal block, and a positive wire and a negative wire electrically connecting the heaters to the terminal block. The junction box includes a first switching unit disposed between the positive wire and the positive bus bar, and a second switching unit disposed between the negative wire and the negative bus bar.

A system and method for predictive fuel cell management system for an integrated hydrogen-electric engine is disclosed. The system includes a fuel cell stack having a plurality of fuel cells and a computer having a memory and one or more processors. The one or more processors configured to predict, during a first phase of energy demand on the integrated hydrogen-electric engine, an impending occurrence of a second phase of energy demand on the integrated hydrogen-electric engine, wherein the second phase of energy demand includes a predetermined energy demand; and generate a predetermined amount of energy from the plurality of fuel cells based on the predicted second phase of energy demand prior to starting the second phase of energy demand to improve energy efficiency and performance of the integrated hydrogen-electric engine.

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.