Abstract: The present invention provides a fuel cell separator having an airtight gasket, in which a gasket is integrally injection-molded in a region that requires airtightness of a fuel cell separator to maintain airtightness of each flow field of the separator and to smoothly guide the fluid flow in each flow field. For this purpose, the present invention provides a fuel cell separator having an airtight gasket, which is integrally injection-molded on both surfaces of the separator to form a closed curve.

Abstract: The present invention preferably provides a separator for a fuel cell, in which a strength reinforcing means is integrally formed in a region, which is not supported by a gasket, over the region from manifolds, through which reactant gases and coolant are supplied, to a reaction flow field, in which a reaction takes place, thus suitably preventing local deformation of the separator.

Abstract: The present invention provides an apparatus and method for manufacturing a metal separator for a fuel cell, which can manufacture large-sized metal separators in large quantities using metal plates such as stainless steel by thermoplastic deformation using an incremental and synchronized rubber molding process.

Abstract: The present invention provides a fuel cell bipolar plate and a method for manufacturing the same, in which a carbon or metal fuel cell bipolar plate is surface-treated with a complex transition metal oxide, which is a main component of a variable resistance heating element having a negative temperature characteristic, so that the bipolar plate can ensure a sufficient amount of heat, required to prevent product water from freezing, by itself in a short time without any external energy, thus improving cold start performance of a fuel cell vehicle at a temperature below zero.

Abstract: The present invention relates to a method of manufacturing a proton-conducting reinforced composite membrane, and more particularly, to a reinforced composite membrane which is manufactured by introducing an additive into a sulfonated hydrocarbon-based polymer as a proton-conducting material, and impregnating the additive-introduced polymer into a porous polymer having excellent dimensional stability.

Abstract: Disclosed is a structure for improving a laminating efficiency of a metal-separator for a fuel cell stack, the metal-separator comprising an embossed structure that has an indentation and a projection alternately formed along at least one edge thereof so as to enable a plurality of the metal-separators to be stably laminated in a honeycomb shape.

Abstract: The present invention provides a gasket for reducing stress concentration in a fuel cell stack, which prevents damage or deformation of a separator and further prevents a position shift of the gasket by reducing stress concentration formed at a specific region by deformation of the gasket due to a compression force. Accordingly, the present invention provides a gasket including a T-shaped or cross-shaped gasket joint to form hydrogen, air and coolant manifolds, and the gasket joint has a structure in which two joint branches forming an angle of 180° in the opposite direction to each other are joined at one point with a particular angles so as to reduce stress concentration formed due to compression force by deformation of the gasket.

Abstract: The present invention provides a metal separator for a fuel cell, which is formed by stamping molding a first metal thin plate and a second metal thin plate, the metal separator comprising: at least one cooling flow field enclosed by inner surfaces of the first and second metal thin plates; first and second main flow fields enclosed by outer surfaces of the first and second thin plates, respectively; and first and second auxiliary flow fields formed on a top surface of the first main flow field and a bottom surface of the second main flow field, respectively.

Abstract: Disclosed is a structure for improving a laminating efficiency of a metal-separator for a fuel cell stack, the metal-separator comprising an embossed structure that has an indentation and a projection alternately formed along at least one edge thereof so as to enable a plurality of the metal-separators to be stably laminated in a honeycomb shape.