Abstract: A fuel cell humidifier may completely or substantially completely prevent condensate water from entering a running fuel cell stack. The fuel cell humidifier includes a housing; a plurality of hollow fiber membranes arranged in the housing; a cap which is coupled to one end of the housing and has an air discharge port for supplying humidified air to the fuel cell stack; and a bypass tube for transferring condensate water generated from the humidified air to an interior space of the housing through which a discharge gas flows, wherein a first end of the bypass tube is disposed inside the air discharge port, and the bypass tube is in fluid communication with the interior space of the housing through a second end of the bypass tube.

Abstract: The present invention relates to a humidifier for a fuel cell, the humidifier comprising: a humidifying module for humidifying a dry gas, supplied from the outside, by using a wet gas discharged from a fuel cell stack; and a first cap coupled to one end of the humidifying module. The humidifying module includes: a mid-case; and at least one cartridge disposed in the mid-case and accommodating a plurality of hollow fiber membranes. The humidifier for a fuel cell further includes a first packing member which is air-tightly coupled to at least one end of the humidifying module through mechanical assembly so that the first cap is in fluid communication with only the hollow fiber membranes.

Abstract: A device for secure and automated enrollment-certificate bootstrapping on keys and certificates for a vehicle to everything (V2X) environment of a V2X end entity in a security credential management system (SCMS) for V2X communication, the device comprising: a processor; and a memory configured to store at least one instruction to be performed by the processor, the at least one instruction is configured to instruct the processor to perform steps of: by a secure bootstrapping service (SBS) agent, checking, for an SSB server, configuration information; by the SBS agent, making a request for bootstrapping data to the SBS server; and by the SBS agent, installing the bootstrapping data in the SBS server.

Abstract: The present invention relates to a cartridge of a fuel cell humidifier and the fuel cell humidifier, the cartridge comprising: an inner case to be inserted into a middle case of the fuel cell humidifier for humidifying dry gas supplied from the outside using wet gas discharged from a fuel cell stack; a plurality of hollow-fiber membranes accommodated inside the inner case; a first potting part which is coupled to the inner case and which fixes one side of each of the hollow-fiber membranes; a second potting part which is coupled to the the inner case and which fixes the other sides of the hollow-fiber membranes; and a link member for connecting the inner case to the middle case so that the middle case and the inner case are linked so as to move according to the pressure of the wet gas positioned inside the middle case.

Abstract: The present invention relates to a fuel cell membrane humidifier capable improving humidifying efficiency by controlling the flow direction of fluid, and the fuel cell membrane humidifier according to an embodiment of the present invention comprises: a hollow fiber membrane module for accommodating a hollow fiber membrane in which a first fluid and a second fluid perform moisture exchange while the first fluid flows therein and the second fluid flows on the outside thereof; and a housing part constituting the appearance of the membrane purifier, wherein a fluid guide part for uniformly guiding the flow of fluid is formed between the hollow fiber membrane and the housing part.

Abstract: Disclosed are: a fuel cell humidifier, which can be manufactured at improved productivity and can significantly reduce maintenance and repair costs; and a packing member for same. The fuel cell humidifier of the present invention comprises: a humidification module for humidifying, with the moisture in exhaust gas discharged from a fuel cell stack, the air supplied from the outside; and a cap coupled to one end of the humidification module, wherein the humidification module includes a middle case and at least one cartridge, which is arranged inside the middle case and includes a plurality of hollow-fiber membranes, and the fuel cell humidifier further includes the packing member coupled to one end of the humidification module in an airtight manner through a mechanical assembly so that fluid-communication can be performed between the cap and only the hollow-fiber membranes.

Abstract: Disclosed are a fuel cell system capable of maintaining hydrogen density of the exhaust gas discharged from the fuel cell system at a level below the tolerance limit so that any fears about fire and/or explosion can be dispelled and the safety of the system can be remarkably improved, and a humidifier therefor. The fuel cell system of the present invention comprises a fuel cell stack; and a humidifier configured to (i) humidify an air supplied from outside by means of an off-gas discharged from the fuel cell stack and (ii) supply the humidified air to the fuel cell stack, wherein the off-gas is mixed with at least a portion of the humidified air in the humidifier.

Abstract: Disclosed is a membrane humidifier for a fuel cell, which can prevent, without a separate gas filtering device, performance deterioration of a fuel cell due to harmful gases during a humidifying process.

Abstract: Disclosed is a membrane humidifier for a fuel cell, comprising multi-channel hollow fiber membranes having a plurality of channels in various sizes, thus allowing humidifying performance to be maintained in the case of a high rate of flow and to be decreased in the case of a low rate of flow, and thereby preventing flooding. The membrane humidifier for a fuel cell, according to the present invention, comprises: a middle case in which a plurality of hollow fiber membranes are accommodated; a cap case coupled to the middle case; and a fixing unit in which ends of the plurality of hollow fiber membranes are potted, wherein a plurality of channels are formed in each of the hollow fiber membranes, and the difference between the biggest and smallest inner diameters among the inner diameters of the plurality of channels is 30-600 ?m.

Abstract: The present invention relates to a carbon aerogel precursor, a preparation method thereof and a carbon aerogel prepared thereby and, more particularly, to a carbon aerogel precursor which can be converted into a carbon aerogel that exhibits excellent specific surface area and physical properties by using a binder that has a low carbonization ratio and is capable of performing phase conversion while using a carbon material having physical properties such as diameter, length and the like that are not adjusted, a preparation method thereof, and a carbon aerogel prepared thereby.

Abstract: The present invention relates to a method for manufacturing a hollow fiber membrane module by using an open hollow fiber membrane cartridge, and a hollow fiber membrane module manufactured by same, the method for manufacturing a hollow fiber membrane module according to an embodiment of the present invention comprising the steps of: preparing a hollow fiber membrane cartridge; opening the hollow fiber membrane cartridge; arranging a hollow fiber membrane on the opened hollow fiber membrane cartridge; and closing the hollow fiber membrane cartridge on which the hollow fiber membrane is arranged.

Abstract: The present invention relates to a composite hollow fiber membrane, a manufacturing method therefor, a hollow fiber membrane cartridge including same, and a fuel cell membrane humidifier, the composite hollow fiber membrane comprising a hollow fiber membrane and a contaminant collection layer coated on the inner surface of the hollow fiber membrane. The composite hollow fiber membrane can prevent performance deterioration of a fuel cell by removing, without a separate gas filtering device, contaminants such as nitrogen oxide (NOx), sulfur oxide (SOx), and ammonia (NH3) during a humidifying process.

Abstract: A fuel cell humidifier may completely or substantially completely prevent condensate water from entering a running fuel cell stack. The fuel cell humidifier includes a housing; a plurality of hollow fiber membranes arranged in the housing; a cap which is coupled to one end of the housing and has an air discharge port for supplying humidified air to the fuel cell stack; and a bypass tube for transferring condensate water generated from the humidified air to an interior space of the housing through which a discharge gas flows, wherein a first end of the bypass tube is disposed inside the air discharge port, and the bypass tube is in fluid communication with the interior space of the housing through a second end of the bypass tube.

Abstract: According to an exemplary embodiment of the present invention, provided is a method for manufacturing a superconductor including magnesium diboride, the method including: a first mixture preparation step of preparing a first mixture including a boron powder and a liquid chlorinated hydrocarbon compound; a second mixture preparation step of preparing a second mixture including the first mixture and a magnesium powder; a molded body manufacturing step of manufacturing a molded body by pressurizing the second mixture; and a sintering step of sintering the molded body to manufacture a superconductor including magnesium diboride.

Abstract: The present invention relates to a fuel cell membrane humidifier capable improving humidifying efficiency by controlling the flow direction of fluid, and the fuel cell membrane humidifier according to an embodiment of the present invention comprises: a hollow fiber membrane module for accommodating a hollow fiber membrane in which a first fluid and a second fluid perform moisture exchange while the first fluid flows therein and the second fluid flows on the outside thereof; and a housing part constituting the appearance of the membrane purifier, wherein a fluid guide part for uniformly guiding the flow of fluid is formed between the hollow fiber membrane and the housing part.

Abstract: A humidifier for a fuel cell is provided and includes a housing having, at a first side, a moist air supply port through which moist air is supplied from a fuel cell stack and having, at a second side, a moist air discharge port. A humidifying membrane is disposed in the housing and allows dry air to flow along the inside of the humidifying membrane. A bypass flow path is formed in the housing to allow a part of the moist air supplied to the moist air supply port to continuously flow to the moist air discharge port without passing through the humidifying membrane, thereby adjusting the amount of humidification and a differential pressure of the humidifier based on an operating condition of a fuel cell.

Abstract: The present disclosure relates to a superconductor including magnesium diboride and a production method therefor. A superconductor having a high critical current density at a certain temperature and under a certain magnetic field may be obtained by doping magnesium diboride with liquid chloroform during the production of the superconductor.

Abstract: The present invention relates to a carbon aerogel precursor, a preparation method thereof and a carbon aerogel prepared thereby and, more particularly, to a carbon aerogel precursor which can be converted into a carbon aerogel that exhibits excellent specific surface area and physical properties by using a binder that has a low carbonization ratio and is capable of performing phase conversion while using a carbon material having physical properties such as diameter, length and the like that are not adjusted, a preparation method thereof, and a carbon aerogel prepared thereby.

Abstract: A hollow fiber membrane module includes a housing having an inlet formed one end thereof and an outlet formed on the other end thereof, in which hot and humid humidifying fluid flows in through the inlet and the humidifying fluid after humidifying a cool and dry fluid flowing out of the housing through the outlet; at least one hollow fiber membrane bundle which is inserted into the housing in the longitudinal direction; a partitioning part for supporting the hollow fiber membrane bundle and partitioning an inflow space, in which the humidifying fluid flowing into the housing momentarily remains, and an outflow space, in which the humidifying fluid momentarily remains before being discharged through the outlet; and a potting part for potting both ends of the hollow fiber membrane bundle to the housing.

Abstract: Disclosed is a hollow fiber membrane module. The hollow fiber membrane module includes a housing including a first fluid inlet, a first fluid outlet, a second fluid inlet and a second fluid outlet, and hollow fiber membrane bundles, each hollow fiber membrane bundle including a plurality of hollow fiber membranes, disposed within the housing so that a first fluid flows inside the hollow fiber membranes and a second fluid flows outside the hollow fiber membranes, and each hollow fiber membrane bundle further includes porous tubes having both ends closed and including a plurality of pores formed on the side surfaces thereof. The hollow fiber membrane module removes a region, into which a fluid flowing outside a hollow fiber membrane bundle has difficulty in permeating, thus allowing the fluid to uniformly flow. Therefore, even if hollow flow membranes are highly integrated, performance of the hollow fiber membrane module may be maximized.