Abstract: An air shut-off valve apparatus for a fuel cell system is provided. The apparatus includes a valve body having an inlet-side air passage through which supply air flows and an outlet-side air passage through which exhaust air flows. A valve flap is installed in the valve body to open or close the inlet-side air passage and the outlet-side air passage. An inlet-side check valve is opened when pressure of the supply air is greater than or equal to a predetermined pressure, to guide the supply air into the fuel cell stack through the inlet-side air passage even while the valve flap is closed. An outlet-side check valve is opened when pressure of the exhaust air is greater than or equal to a predetermined pressure, to guide the exhaust air released from the fuel cell stack to flow through the outlet-side air passage even while the valve flap is closed.

Abstract: A humidifier for a fuel cell includes a body, first and second humidifying spaces formed inside the body, an exhaust gas inlet and an exhaust gas outlet for supplying exhaust gas released from the fuel cell stack into the first and second humidifying spaces, a passing space formed inside the body and directly or indirectly communicated with the second humidifying space and the fuel cell stack. The inflow gas flows into the passing space from the first humidifying space. A valve is installed in the passing space to allow the inflow gas introduced into the passing space to flow into the fuel cell stack with or without passing through or to allow some of the inflow gas introduced into the passing space to flow into the fuel cell stack passing through the second humidifying space and others of the inflow gas introduced into the fuel cell stack without passing through the second humidifying space.

Abstract: An apparatus and a method for controlling a humidification amount of a membrane humidifier for a fuel cell are provided. The humidification amount of the membrane humidifier relative to air supplied to a stack is changed by adjusting a difference in partial pressure of moisture between the inside and the exterior of a hollow fiber membrane that constitutes the membrane humidifier for a fuel cell.

Abstract: A humidifier for a fuel cell includes: a bundle of hollow fiber membranes disposed therein, such that an intake gas flows inside the bundle of hollow fiber membranes; a housing configured to accommodate the bundle of hollow fiber membranes, such that an exhaust gas, which has a higher humidity than the intake gas, flows inside the housing; and a guide member disposed in the housing to restrict a movement of the bundle of hollow fiber membranes inside the housing. Coolant flows through the guide member to cool the exhaust gas to promote condensation of the exhaust gas.

Abstract: A structure of a fuel cell system and a controlling method thereof are provided. The structure of the fuel cell system includes a flow sensor that is configured to detect a flow of air introduced into the fuel cell system and an air compressor that is configured to compress the introduced air and has an air foil bearing to maintain minimum driving revolutions per minute or greater. Additionally, the system includes a flow adjuster that is connected to the fuel cell system. Accordingly, since an amount of air corresponding to a required amount of air of the fuel cell system is supplied by limiting or recirculating an excessive air supply while securing durability and durability of abrasion of the air compressor to which the air foil bearing is applied, a dry phenomenon of the fuel cell system including a stack due to the excessive supply of air is prevented.

Abstract: An apparatus and a method for controlling a humidification amount of a membrane humidifier for a fuel cell are provided. The humidification amount of the membrane humidifier relative to air supplied to a stack is changed by adjusting a difference in partial pressure of moisture between the inside and the exterior of a hollow fiber membrane that constitutes the membrane humidifier for a fuel cell.

Abstract: A humidification apparatus for a fuel cell system is provided herein. A membrane humidifier includes humid air inlets, through which humid air discharged from a cathode of a fuel cell stack is introduced, and air outlets, through which air humidifying dry air in hollow fiber membranes is discharged, an air line connected from a cathode outlet of the fuel cell stack to the humid air inlets of the membrane humidifier to supply humid air. Exhaust lines are connected to the air outlets. A flow control valve is provided in the air line and controls the introduction of humid air into the humid air inlets, respectively. An exhaust valve is also provided to open and close flow paths of the exhaust lines. A controller controls the opening and closing of the flow control valve and the exhaust valve based on operating conditions of the fuel cell stack.

Abstract: A humidifier for a fuel cell system is provided to improve humidification efficiency of a hollow fiber improving a gas flow inside a membrane module into which tube side air and moist air are introduced. The humidifier includes a membrane module in which hollow fibers are fixed inside a case in a bundle form and a first manifold and a second manifold each assembled at both ends of the case. An inside of the membrane module includes a tube side air supply tube which forms a gas flow in the same direction as the hollow fiber and one side of the tube side air supply tube includes at least one moist air pumping part configured to suction moist air flowing in an exterior of the tube side air supply tube by a flow velocity and a flow pressure of tube side air.

Abstract: A humidifier integrated stack includes: unit cells including a fuel electrode and an air electrode; a stack module in which the unit cells are stacked; a manifold block having a predetermined space, an air inlet receiving air to be supplied to the air electrode from the outside, and an air outlet communicating with the predetermined space and discharging the air discharged from the air electrode to the outside; and a humidifying member communicating with the inlet in the space of the manifold block, and guiding the air supplied through the inlet to the air electrode through an internal hollow thereof, wherein the manifold block provides the space that allows the air discharged from the air electrode to supply moisture to the humidifying member while passing through the predetermined space and being discharged to the outlet, so as to humidify the air flowing through the hollow of the humidifying member.

Abstract: A humidifier for a fuel cell includes a connection hose part connected to an air inlet of a fuel cell stack. A humidifier port part is coupled to an inner peripheral surface of the connection hose part and connects the connection hose part to an air outlet of a humidifier housing. A condensate collection part is coupled to an upper portion of the humidifier port part so that a condensate collection space is defined between an outer peripheral surface of the condensate collection part and the inner peripheral surface of the connection hose part.

Abstract: An apparatus and a method for controlling a humidification amount of a membrane humidifier for a fuel cell are provided. The humidification amount of the membrane humidifier relative to air supplied to a stack is changed by adjusting a difference in partial pressure of moisture between the inside and the exterior of a hollow fiber membrane that constitutes the membrane humidifier for a fuel cell.

Abstract: A membrane humidifier includes buffering and spacing structures each interposed between adjacent hollow fiber membranes of a plurality of hollow fiber membranes arranged in a housing of the membrane humidifier, wherein the buffering and spacing structures buffer a pressure of air supplied from an air blower and maintain a spacing between the adjacent hollow fiber membranes.

Abstract: A membrane humidifier for a fuel cell, the membrane humidifier includes, a humidifier housing, and a bundle of hollow fiber membranes which has both ends potted by potting members and accommodated in the humidifier housing, wherein a bypass flow tube having a plurality of pores is also potted by the potting members in addition to the bundle of hollow fiber membranes, such that a part of dry air from an air blower is bypassed from the outside to the inside of the potting member through the bypass flow tube, and thereafter, the dry air is injected into an internal space of the humidifier housing where the bundle of hollow fiber membranes is present.

Abstract: A humidifier for a fuel cell includes a connection hose part connected to an air inlet of a fuel cell stack. A humidifier port part is coupled to an inner peripheral surface of the connection hose part and connects the connection hose part to an air outlet of a humidifier housing. A condensate collection part is coupled to an upper portion of the humidifier port part so that a condensate collection space is defined between an outer peripheral surface of the condensate collection part and the inner peripheral surface of the connection hose part.

Abstract: Provided are air humidification device and method for a fuel cell. The air humidification device and method for the fuel cell may cool an air compressor and air compressed by the air compressor and easily humidify air supplied to the fuel cell by mixing water with air and injecting the mixture into an inlet of the air compressor. In particular, the air humidification device and method may easily humidify air supplied to a cathode of the fuel cell by bypassing a portion of the compressed air from an outlet of an air compressor supplying air to the cathode of the fuel cell and simultaneously by injecting condensed water discharged from a fuel cell system into an inlet of the air compressor using the bypassed compressed air.

Abstract: Disclosed is a device for adjusting humidification gas of a membrane humidification device of a fuel cell. In particular, the device is adapted to induce changes in differential pressure and velocity of the wet air for each division module and to improve the humidification efficiency by sequentially mounting the division modules divided into various numbers to the interior of a housing of the membrane humidification device, thereby adjusting the density of the hollow fiber membrane filled in each division module.

Abstract: A membrane humidifier for a fuel cell, the membrane humidifier includes, a humidifier housing, and a bundle of hollow fiber membranes which has both ends potted by potting members and accommodated in the humidifier housing, wherein a bypass flow tube having a plurality of pores is also potted by the potting members in addition to the bundle of hollow fiber membranes, such that a part of dry air from an air blower is bypassed from the outside to the inside of the potting member through the bypass flow tube, and thereafter, the dry air is injected into an internal space of the humidifier housing where the bundle of hollow fiber membranes is present.

Abstract: An apparatus and a method for controlling a humidification amount of a membrane humidifier for a fuel cell are provided. The humidification amount of the membrane humidifier relative to air supplied to a stack is changed by adjusting a difference in partial pressure of moisture between the inside and the exterior of a hollow fiber membrane that constitutes the membrane humidifier for a fuel cell.

Abstract: A membrane humidifier includes buffering and spacing structures each interposed between adjacent hollow fiber membranes of a plurality of hollow fiber membranes arranged in a housing of the membrane humidifier, wherein the buffering and spacing structures buffer a pressure of air supplied from an air blower and maintain a spacing between the adjacent hollow fiber membranes.

Abstract: Disclosed is a fuel cell stack using a separator in which two or more reaction areas are connected in an insulated manner. Further, a gas diffusion layer, a membrane electrode assembly and the like are sequentially stacked on each reaction area of the separator, and the reaction areas are connected in series to configure a single stack module thereby increasing the voltage generated in the fuel cell stack and maintain the current at a low level.