The invention relates to a fuel cell system (100) having at least one fuel cell stack (101), an air path (10), wherein air from the surroundings reach the fuel cell stack (101) via the air path (10), an exhaust gas path (12), a fuel line (20), wherein fuel is transported to the fuel cell stack (101) via the fuel line (20). According to the invention, the air path (10) is connected to a cooling line (30) via a branch (33), wherein the cooling line (30) is connected to a PDU unit (32).

The fuel cell control system includes: a reactor; an air compressor, wherein the air compressor has a compressing cavity, the compressing cavity has a gas inlet and a gas outlet, a rotatable pressure wheel is disposed inside the compressing cavity, and the gas outlet is in communication with the reactor; a control flow channel, wherein a first end of the control flow channel is in communication with the gas-intake side of the pressure wheel, a second end of the control flow channel is in communication with the wheel-back side of the pressure wheel, and the control flow channel is provided with a return valve for regulating the flow rate of the control flow channel; and a central control unit, wherein the central control unit is communicatively connected to the return valve to control the opening degree of the return valve.

A fuel cell power generation system is provided with: at least one fuel cell module each of which includes a fuel cell having a fuel-side electrode, an electrolyte, and an oxygen-side electrode; at least one fuel supply line for supplying a fuel gas to the fuel-side electrode included in the at least one fuel cell module; at least one oxidizing gas supply line for supplying an oxidizing gas to the oxygen-side electrode included in the at least one fuel cell module; and a most downstream exhaust fuel gas line through which an exhaust fuel gas discharged from a most downstream module that is disposed most downstream in a flow of the fuel gas among the at least one fuel cell module flows. The most downstream exhaust fuel gas line is configured to supply the exhaust fuel gas to the oxygen-side electrode included in any of the fuel cell modules.

A fuel cell power generation system is provided with: at least one fuel cell module each of which includes a fuel cell having a fuel-side electrode, an electrolyte, and an oxygen-side electrode; at least one fuel supply line for supplying a fuel gas to the fuel-side electrode included in the at least one fuel cell module; at least one oxidizing gas supply line for supplying an oxidizing gas to the oxygen-side electrode included in the at least one fuel cell module; and a most downstream exhaust fuel gas line through which an exhaust fuel gas discharged from a most downstream module that is disposed most downstream in a flow of the fuel gas among the at least one fuel cell module flows. The most downstream exhaust fuel gas line is configured to supply the exhaust fuel gas to the oxygen-side electrode included in any of the fuel cell modules.

The present invention is a hydrogen exhaust device for fuel cell. A tail gas discharge device for a fuel cell system includes a steam trap, a buffer solenoid valve, a buffer tank and a drain solenoid valve. The steam trap can collect water from wet hydrogen. The buffer tank is a hollow cavity structure such as a tank. Preferably, the steam trap has an upper cover, a main body, a lower cover and a filter. The upper cover has a wet hydrogen inlet, a pressure sensor, a dry hydrogen outlet and a temperature sensor. The lower cover has a liquid storage cavity and a filter support part. The filter has a filter filler and a filter intake channel.

A cooling control method of a fuel cell is provided. The method includes estimating a temperature of a separator based on heat exchange between the separator formed between unit cells of a fuel cell stack and coolant flowing through a cooling line between the separators. A ratio of coolant passing through a heat exchange device to coolant bypassing the heat exchange device is adjusted based on the estimated temperature of the separator. Additionally, a rotation speed of a pump for circulating coolant for cooling the fuel cell stack is adjusted based on the estimated temperature of the separator.

A control device for a fuel cell vehicle includes a power limiter limiting power of a fuel cell when a temperature correlation value correlated to a temperature of the fuel cell indicates that the temperature is equal to or higher than a temperature threshold, a calculation unit calculating a weight of a towed vehicle, a gradient acquirer acquiring upward gradients at respective points on a planned traveling route, a predictor predicting whether the power of the fuel cell is limited when the fuel cell vehicle is traveling along the planned traveling route in a towing travel state, and a controller issuing, when the predictor predicts that the power of the fuel cell is limited, an alert that a vehicle speed of the fuel cell vehicle is expected to decrease when the fuel cell vehicle is traveling along the planned traveling route in the towing travel state.

A control device for a fuel cell vehicle includes a power limiter limiting power of a fuel cell when a temperature correlation value correlated to a temperature of the fuel cell indicates that the temperature is equal to or higher than a temperature threshold, a calculation unit calculating a weight of a towed vehicle, a gradient acquirer acquiring upward gradients at respective points on a planned traveling route, a predictor predicting whether the power of the fuel cell is limited when the fuel cell vehicle is traveling along the planned traveling route in a towing travel state, and a controller issuing, when the predictor predicts that the power of the fuel cell is limited, an alert that a vehicle speed of the fuel cell vehicle is expected to decrease when the fuel cell vehicle is traveling along the planned traveling route in the towing travel state.

A fuel cell stack has a plurality of fuel cells arranged in a row, each of them comprising a membrane separating the electrodes, with ports for the respective supply and drainage of a fuel and an oxidizer and with a tensioning device for pressing the fuel cells together, wherein the tensioning device is formed by a band and spring system having an integrated force transducer, the signal of which can be relayed to a controller for determining the moisture content based on the moisture-dependent swelling behavior of the membrane of each fuel cell. A fuel cell device with such a fuel cell stack as well as a motor vehicle having such a fuel cell device are also provided.

The present invention relates to a protective reformer device (10) for the protection of an anode section (112) of a fuel cell stack (110) against oxidizing damage during a heating-up process, having a gas duct (20) with a gas inlet (22) and a gas outlet (24) for conducting fuel gas from an anode feed section (120) of the fuel cell stack (110), wherein a catalytic converter section (30) is arranged in the gas duct (20) for a catalytic oxidation of at least part of the fuel gas into a protective gas for feeding to the anode section (112), wherein, furthermore, the gas duct (20) has a temperature control device (40) in thermally transmitting contact with the catalytic converter section (30) for an active temperature control of the catalytic converter section (30).