Abstract:
본 발명은 연료전지의 금속분리판에 적용되는 가스켓의 성형 구조를 개선한 연료전지용 금속분리판 가스켓에 관한 것이다. 본 발명은 금속분리판에 성형되는 가스켓의 구조를 개선하여 가스켓의 성형 정밀성을 향상시킬 수 있고, 금속분리판 스택의 셀 간 단락 방지 및 스택 케이스와의 절연을 구현할 수 있는 연료전지용 금속분리판 가스켓을 제공한다. 본 발명에서 제공하는 연료전지용 금속분리판 가스켓 구조는 금속분리판 외곽 테두리부를 반응면/냉각면 양면을 감싼 형태와 감싸지 않은 형태가 반복되는 구조를 가짐으로써, 가스켓의 성형 정밀성을 높일 수 있고, 금속분리판 스택의 셀 간 단락을 방지할 수 있으며, 스택 케이스와의 절연을 실현할 수 있다. 연료전지, 금속분리판, 가스켓, 기밀성
Abstract:
A metal separator gasket for a fuel cell is provided to enhance the molding accuracy of a gasket, to prevent the short circuit of the cells of a metal separation plate stack and to realize the insulation with a stack case. A metal separator gasket for a fuel cell has a structure of adhering a rubber gasket(10) applied to the metal separation plate stack to maintain the sealing, while surrounding the outside border reaction surface / cooling surface of a metal separation plate(11), wherein the exposed part(13) of each surface is repetitively shown up without surrounding the reaction surface / cooling surface along the border.
Abstract:
본 발명은 예비 성형체를 이용해 제작된 연료전지용 분리판 및 예비 성형체를 이용한 연료전지용 분리판의 2단계 제조 방법에 관한 것으로, 단위전지의 양단에 결합되어 상기 단위전지를 지지하는 연료전지용 분리판의 제조 방법에 있어서, 상기 분리판은, 완성될 상기 분리판의 형상과 유사한 미완성의 예비 성형체를 만드는 예비 성형 단계; 및 상기 예비 성형체를 성형하여 상기 분리판을 제작하는 주 성형 단계를 거쳐 제조되는 것을 특징으로 한다. 이에 팽창 흑연과 판상 흑연 및 페놀 수지 또는 팽창 흑연과 탄소 섬유 및 페놀 수지를 이상적으로 혼합한 복합 소재를 이용하여 예비 성형 및 주 성형의 2단계로 분리판을 제조함으로써 주 성형 시간이 단축되어 대량 생산에 유리한 연료전지용 분리판을 제조할 수 있는 장점이 있다. 연료전지, 분리판, 팽창 흑연, 보강재, 예비 성형체, 예비 성형, 주 성형
Abstract:
A two-step process for producing a bipolar plate for a fuel cell using a preform is provided to reduce the time during which a high-pressure press is used, and to reduce the weight of the resultant bipolar plate, while maintaining the quality. A two-step process for producing a bipolar plate coupled to both ends of unit cells for supporting the unit cells, comprises the steps of: (A) a forming a non-finished preform(17) having a shape similar to the shape of a bipolar plate to be finished; and (B) molding the preform to provide the bipolar plate. In step (A), a first side mold(21) is mounted to both sides of a first lower mold; a mixture of expanded graphite, plate-like graphite and a phenolic resin, or a mixture of expanded graphite, carbon fibers and a phenolic resin is filled into the inner part of the first lower mold and the first side mold; a spreader is reciprocated to uniformly disperse the mixture to the same level as the height of the first side mold; an additional mold is installed at the top of the first side mold to control the filling level of the mixture; and a first upper mold is installed at the top of the mixture to provide the preform.
Abstract:
A mold for molding the separator of a fuel cell stack, and a molding method using the mold are provided to minimize the deviation of thickness of a manifold part of an upper mold, thereby improving sealing property of reaction gas and cooling water in a fuel cell stack. A mold for molding the separator of a fuel cell stack comprises an upper mold and a lower mold(20) having a forming part; a side mold(30) which prevents the falling of a forming powder(50) at the both sides of a lower mold; and an auxiliary mold(40) which is installed at the part except the charging region so as to allow a forming powder(55) to be further charged into the region corresponding to the forming part having a large cross-sectional area of an upper mold on the flattened forming powder charged into the lower mold.
Abstract:
A humidifying system for a fuel cell vehicle is provided to realize a compact size, increased durability and minimized energy consumption, while ensuring easy controlling of water content. A humidifying system for a fuel cell vehicle comprises: a fuel cell(100); a cooling water storage tank(110) disposed at the bottom of the fuel cell; a humidifying chamber(10) having a double wall structure formed of an inner wall and an outer wall, and equipped with a heat exchange member attached to the inner wall surface; a sprayer mounted to the humidifying chamber; water treatment unit(200) disposed at the bottom of the humidifying chamber; a radiator(50) into which cooling water passed from the humidifying chamber is introduced; a pressurizing pump(30) for supplying reaction water of the cooling water storage tank to the humidifying chamber; and an ECU(150) for controlling the operation of the pressurizing pump to adjust the humidifying degree.
Abstract:
A metal separator for a polymer electrolyte fuel cell is provided to prevent the generation of bubbles, to improve the uniformity of cooling flow and to reduce the pressure difference of a cooling medium regardless of a gas channel of serpentine structure. A metal separator comprises a plurality of layers of a cell comprising a gasket(12,14), a membrane electrode assembly and a gas diffusion layer(13) which are adhered between separators, wherein the metal thin film of the separator is made by stamping method. The metal separator(10,11) is provided with a serpentine channel for delivering a reaction gas, the metal separators between the cells are adhered to form a cooling channel, a cooling channel entrance and a cooling channel exit are formed at the lower and upper ends of the separator, and the cooling water flowing into the entrance of the cooling channel moves through the cooling channel so as to be spread into the entire separator and so as to be discharged at the exit of the cooling channel, thereby flowing in the opposite direction of gravity.