Abstract:
A fuel cell stack includes a first separator and a second separator that are adhered to face each other between adjacent membrane electrode assemblies (MEAs) and each have a plurality of manifolds, a reacting region, and a guide region disposed between the plurality of manifolds and the reacting region. In the fuel cell stack, a first cooling medium guide channel guiding flow of a cooling medium between the plurality of manifolds and the reacting region is formed in the guide region of the first separator; a second cooling medium guide channel guiding flow of the cooling medium between the plurality of manifolds and the reacting region is formed in the guide region of the second separator; and at least portions of the first cooling medium guide channel and the second cooling medium guide channel overlap to communicate with each other.
Abstract:
A fuel cell includes a reaction layer including: a membrane electrode assembly (MEA); and gas diffusion layers (GDLs) each of which is disposed at both side surfaces of the MEA. A porous separation layer has one surface adhered to one surface of the reaction layer and supplied with reaction gas, and a cathode bipolar plate has a panel shape and adhered to another surface of the porous separation layer. A front end part of the cathode bipolar plate having a manifold that is supplied with the reaction gas and having a plurality of diffusion channels through which the reaction gas directs from the manifold toward the porous separation layer. The cathode bipolar plate has a partition wall channel which separates the porous separation layer, which extends in a direction in which the reaction gas flows, and which extends from the manifold in a diagonal direction.
Abstract:
A fuel cell that includes a membrane-electrode assembly and separation plates disposed on both sides of the membrane-electrode assembly is provided. The fuel cell includes barrier ribs formed in reaction surfaces of the separation plates corresponding to the membrane-electrode assembly and configured to partition the reaction surfaces into a plurality of reaction regions. A micropore body is installed between the separation plate and the membrane-electrode assembly. The micropore body includes porous units disposed in the reaction region, and a connection unit integrally coupled to the porous units and flatly contacts the barrier ribs.
Abstract:
A fuel cell is provided which includes a catalyst layer to which hydrogen gas or air are introduced through both surfaces thereof a first separator disposed at a first side of the catalyst layer and including a plurality of first channels such that a first reactant among hydrogen gas or air flows; and a second separator disposed at the second side of the catalyst layer and including a plurality of second channels disposed in a direction perpendicular to the first channels. Particularly, each of the second channels includes a plurality of ventilation apertures such that a second reactant among the hydrogen and the air flows in a direction perpendicular to the second channels.
Abstract:
A fuel cell stack is provided which includes a gasket assembly interposed between the membrane-electrode assembly and an edge portion of the metal separator. In particular, the metal separator is formed of a first metal plate and a second metal plate welded to each other, and one or more curved portions, which are symmetrical to each other, formed around a welded portion of the first and second metal plates. The gasket assembly is then installed between a membrane-electrode assembly and the edge portion of the metal separator with the curved portion therebetween.
Abstract:
Disclosed herein is a fuel cell stack with improved manufacturing performance. The fuel cell stack includes: a separator that comprises a diffusion part, as being provided with a diffusion channel, configured to distribute reaction gas and cooling water and a reaction part, as being continuously formed from the diffusion part and provided with a reaction channel that has a height greater than that of the diffusion channel, configured to move reaction gas distributed from the diffusion part and generate electrons by a chemical reaction; and a gas diffusion layer configured to contact the separator at the diffusion part and the reaction part.
Abstract:
A separator for a fuel cell includes a plurality of channels formed in a reaction surface in the direction of gravity in order to permit reaction gas and generated water to flow therethrough. The fuel cell includes a membrane electrode assembly (MEA) and a gas diffusion layer (GDL). The channels have a wave shape in the reaction surface, and each of the channels includes curved portions and straight portions that are arranged alternately.
Abstract:
A porous panel for a separator of a fuel cell includes a plate-shaped material and uneven lines repeatedly arranged on the porous panel in a direction crossing a gas flow direction. The porous panel is bent at the uneven lines such that upward and downward uneven portions are repeated, and through holes permitting passage of gas formed on opposite sides of each of the uneven lines have an uneven shape.
Abstract:
A separator for a fuel cell and a method for manufacturing the same comprise two sheets of metal plates integrally formed to minimize contact resistance between an upper metal plate and a lower metal plate. The method for manufacturing the separator includes steps of preparing an upper metal plate and a lower metal plate, each plate having opposing main sides, and applying a coating liquid containing a polymer composite material on both sides of the upper and lower metal plates, to form first and second composite material layers on both sides of the upper plates and third and fourth composite material layers on both sides of the lower plates. The method further includes stacking the upper metal plate on the lower metal plate, before drying the respective composite material layers, and integrally bonding the second composite material layer and the third composite material layer to form a single intermediate composite material layer.
Abstract:
A fuel cell that includes a membrane electrode assembly having an electrolyte, an anode catalyst, and a cathode catalyst; and a plurality of frame-gaskets is provided. Each of the frame-gaskets may be disposed between an anode-side separator and the membrane electrode assembly or between a cathode-side separator and the membrane electrode assembly. Additionally, the membrane electrode assembly is provided with an aperture which is used to combine the membrane electrode assembly with the frame-gasket assembly.