Abstract: The present invention provides a fuel cell separator formed of a continuous carbon-fiber composite, and a method for manufacturing the same.

Abstract: The present invention provides an apparatus and method for purging residual water and hydrogen during shutdown of a fuel cell, which can reduce the time required for purging residual water and hydrogen during shutdown of a fuel cell by opening and closing outlet lines of an anode and a cathode in a short period of time using solenoid valves.

Abstract: A system for activating a fuel cell includes a flow meter for measuring the amount of water discharged from an outlet of the air electrode and an outlet of the fuel electrode; a pressure sensor for measuring the pressure at the respective outlets; and a back pressure regulator receiving flow values measured by the flow meters and pressure values measured by the pressure sensors, which are fed back from a controller, and regulating a pressure difference (?P=PCathode?PAnode) to be a value greater than 0. With the system, the activation time of a fuel cell and the amount of hydrogen used for the activation can be reduced, thus improving the productivity and manufacturing cost.

Abstract: The present invention provides a method for manufacturing a membrane-electrode assembly (MEA) which is a core element of a polymer electrolyte membrane fuel cell for a vehicle and an electrode therefor. The method for manufacturing an MEA of the present invention is implemented to provide a highly-concentrated catalyst slurry which is uniformly dispersed, compared to conventional catalyst slurries, by a catalyst slurry manufacturing process including a vacuum defoaming process.

Abstract: The present invention relates to a method and apparatus for preparing a catalyst slurry for fuel cells, in which nano-sized catalyst particles are dispersed uniformly at a high concentration and the adsorption force between the catalyst and ionomer is maximized. The resulting catalyst slurry is suitable for the manufacture of a membrane-electrode assembly (MEA) of a polymer electrolyte (or proton exchange) membrane fuel cell (PEMFC).

Abstract: The present invention relates to a method and apparatus for preparing a catalyst slurry for fuel cells, in which nano-sized catalyst particles are dispersed uniformly at a high concentration and the adsorption force between the catalyst and ionomer is maximized. The resulting catalyst slurry is suitable for the manufacture of a membrane-electrode assembly (MEA) of a polymer electrolyte (or proton exchange) membrane fuel cell (PEMFC).

Abstract: The present invention provides an apparatus and method for determining deterioration of a fuel cell, the method including measuring in real time fluoride ion concentration or pH value of outflow water from a fuel cell stack during operation in a fuel cell vehicle, calculating a fluoride emission rate from the measured value and, if the calculated fluoride emission rate is out of a predetermined normal range, determining deterioration of an electrolyte membrane of the fuel cell stack.

Abstract: The present invention provides a separating plate for a fuel cell stack and method of manufacturing the same, and more particularly, to a separating plate for a fuel cell stack and method of manufacturing the same, in which the separating plate constituting the fuel cell stack is formed in such a fashion as to interpose an array of metal pipes between two sheets of composite material, and a gasket abutting against the separating plate is formed in such a fashion as to define hydrogen and air flow channels, thereby removing a contact resistance between two adjoining separating plates constituting unit cells to improve the efficiency of the fuel cell.

Abstract: A separating plate for polymer electrolyte membrane fuel cell and a method for manufacturing the same is provided. Preferred separating plates for polymer electrolyte membrane fuel cell are capable of being light weight and corrosion resistant, as well as being economical to produce and exhibit good physical properties. Preferred separating plates are produced with compositions comprising graphite and phenolic resin.

Abstract: The present invention provides an end plate for fuel cell stack and a method for manufacturing an end plate, which can increase flexural rigidity per weight, and improve strain at break, and reduce heat transmission by applying hybrid core element having honeycomb and form structures to an end plate having sandwich structure combined to both end portions of a fuel cell stack.

Abstract: The present invention provides a fuel cell separator formed of a continuous carbon-fiber composite, and a method for manufacturing the same.

Abstract: A composite gasket for fuel cell stack comprises two rows of beads and a support which can improve mountability and sealing property and reduce the assembly pressure by using materials having low hardness with reduced volume. This invention also relates to a structure for the assembly of the composite gasket.

Abstract: The present invention relates to a gasket structure for use in a fuel cell having a separator which defines at each of the both ends thereof a hydrogen manifold, an air manifold, an antifreezing solution manifold between the hydrogen manifold and the air manifold, the structure comprising a plurality of gasket parts a portion of which is open toward the outside of the separator so as to prevent antifreezing solution leaked from the antifreezing solution manifold from flowing into the hydrogen manifold and the air manifold.

Abstract: A system for transferring a vehicle body according to an embodiment of the present invention includes a stage accommodating the vehicle body and transferring the vehicle body, and a height regulating unit which is disposed on the stage and which regulates height of the vehicle body according to a type of assembly line. The height regulating unit includes a bracket disposed on a lower portion of the stage; at least one lifter, one end of which is disposed on the bracket and the other end of which is disposed on the vehicle body, so as to raise and lower the vehicle body; and a driving part for driving the lifter.

Abstract: A fuel cell stack structure comprising a unit module, common distributor, and bus bar is disclosed. The unit module comprises fuel cells, current collecting plates, insulating plates, end plates, and fixing bands.

Abstract: A manufacturing method of Membrane-Electrode-Gasket Assemblies (MEGAs) used for polymer electrolyte fuel cells (PEFCs) is described wherein a polymer electrolyte membrane is formed directly on a electrode. A typical PEFC is constructed by assembling membrane-electrode assembly (MEA), gaskets, and separators. According to the invented method, PEFC is fabricated by assembling separators and MEGA, into which MEA and a gasket are integrated. Compared to the conventional MEA-gasket assemblies, MEGAs are easy to handle and can be mass-produced via a manufacturing process in a series. Moreover, employing MEGAs improves PEFC performance since the membrane thickness of MEGAs is lower than that of the conventional MEA-gasket assemblies.

Abstract: A method for operating a polymer electrolyte membrane fuel cell at temperatures below the freezing point of water and an apparatus thereof are provided to prevent damage and performance degradation of the membrane-electrode assemblies. Non-humidified gas flows for several seconds before temperature of the polymer electrolyte membrane fuel cell falls below the freezing temperature of water when operation of the polymer electrolyte membrane fuel cell stops. Simultaneously, anode of the polymer electrolyte membrane fuel cell is filled with a solution having a low freezing point to prevent the temperature of a polymer electrolyte membrane fuel cell falling below the freezing point of water due to the lower ambient temperature in the winter. When the polymer electrolyte membrane fuel cell is restarted, the cell performance is not degraded reflecting that the present invention stably preserves the fuel cell.

Abstract: The present invention relates to a humidifier for humidifying reactant gases for a polymer electrolyte fuel cell system, and more particularly, to the humidifier for humidifying reactant gas which adjusts an amount of water for humidification while reducing electric power consumption and size, thereby maintaining an optimal temperature and humidity of the reactant gas supplied to a polymer electrolyte fuel cell. The humidifier for humidifying reactant gases comprises a humidification vessel connected to a reactant gas inlet pipe for supplying reactant gases thereto, a water inlet pipe for supplying water thereto, and a reactant gas supplying pipe for supplying the humidified reactant gas to the fuel cell are connected, respectively, and a sprayer which is installed in the humidification vessel and finely sprays the reactant gases and water which are supplied to the humidification vessel.

Abstract: A manufacturing method of Membrane-Electrode-Gasket Assemblies (MEGAs) used for polymer electrolyte fuel cells (PEFCs) is described wherein a polymer electrolyte membrane is formed directly on a electrode. A typical PEFC is constructed by assembling membrane-electrode assembly (MEA), gaskets, and separators. According to the invented method, PEFC is fabricated by assembling separators and MEGA, into which MEA and a gasket are integrated. Compared to the conventional MEA-gasket assemblies, MEGAs are easy to handle and can be mass-produced via a manufacturing process in a series. Moreover, employing MEGAs improves PEFC performance since the membrane thickness of MEGAs is lower than that of the conventional MEA-gasket assemblies.

Abstract: A method for operating a polymer electrolyte membrane fuel cell at temperatures below the freezing point of water and an apparatus thereof are provided to prevent damage and performance degradation of the membrane-electrode assemblies. Non-humidified gas flows for several seconds before temperature of the polymer electrolyte membrane fuel cell falls below the freezing temperature of water when operation of the polymer electrolyte membrane fuel cell stops. Simultaneously, anode of the polymer electrolyte membrane fuel cell is filled with a solution having a low freezing point to prevent the temperature of a polymer electrolyte membrane fuel cell falling below the freezing point of water due to the lower ambient temperature in the winter. When the polymer electrolyte membrane fuel cell is restarted, the cell performance is not degraded reflecting that the present invention stably preserves the fuel cell.