Abstract: A fuel cell includes a membrane electrode assembly having a solid polymer electrolyte membrane, an anode side diffusion electrode and a cathode side diffusion electrode located at both sides of the solid polymer electrolyte membrane, and a pair of separators which holds the membrane electrode assembly. The fuel cell also includes a first seal and a second seal. The first seal is disposed between one of the separators and a periphery portion of whichever of the anode side diffusion electrode and the cathode side diffusion electrode has the larger surface area so as to surround whichever of the anode side diffusion electrode and the cathode side diffusion electrode has the smaller surface area. The second seal is disposed between the separators so as to surround whichever of the anode side diffusion electrode and the cathode side diffusion electrode has the larger surface area.

Abstract: A fuel cell is provided where assembly of the seals is facilitated and excellent sealability and miniaturization becomes possible. This is achieved by a fuel cell (N) where an electrode film structure (12) having an anode electrode (A) provided on one side of a solid polymer electrolyte film (15), and a cathode electrode (C) provided on the other side thereof is clamped with an anode-side separator (13) and a cathode-side separator (14), wherein a groove (38) is provided in a surface (13a, 14a) of each separator (13) and (14) corresponding to the outer peripheral portion of the anode electrode (A) or the cathode electrode (C), and a seal (S1) having a circular shape in cross-section and with a fin (F) is provided in this groove (38).

Abstract: A sealing resin-metal assembly includes a sealing resin layer injection molded on at least one side of a sheet metal via an elastic primer layer within a mold die. A portion of the elastic primer layer that is brought into abutment with the mold die is formed thicker than the other portion of the elastic primer layer that is not brought into abutment with the mold die so that a clamping pressure of the mole die is received by the elastic primer layer at the portion formed thicker, when the sealing resin layer is laminated.

Abstract: A fuel cell is provided that is reduced in both size and weight while securing a sealed state of respective flow passages by respective sealing members between separators and an electrode assembly. In this fuel cell, there are provided in each of the separators communication ports for reaction gases and cooling medium that are provided outward from gas sealing members, and communication paths that detour around the gas sealing members in the thickness direction of the separators and connect the reaction gas communication ports with gas flow passages. A cooling surface sealing member that seals off the cooling medium flow passage from the reaction gas communication ports is placed at a position shifted from the communication paths towards the communication holes.

Abstract: A method for fabricating a seal-integrated separator for a fuel cell is presented, with which seals can be accurately positioned and the assembling time for the fuel cell units may be greatly reduced.

Abstract: A method for producing a fuel cell unit including a membrane electrode assembly formed by a solid polymer electrolyte membrane and a pair of electrodes located at both sides of the solid polymer electrolyte membrane, and a pair of separators which hold the membrane electrode assembly. The method includes the steps of applying liquid sealant to one of a marginal portion of the solid polymer electrolyte membrane, the marginal portion being not covered by the pair of electrodes when assembled, and a surface of each of the pair of separators, the surface corresponding to the marginal portion of the solid polymer electrolyte membrane; holding the solid polymer electrolyte membrane with the pair of separators to perform temporary assembling; and solidifying the liquid sealant while maintaining a temporary assembling state.

Abstract: In a solid polymer electrolyte membrane [film] type fuel cell of the invention, where a pair of electrodes are provided on opposite sides of a solid polymer electrolyte membrane [film], and the outside thereof is clamped by a pair of separators, and nonconductive picture frame-shaped members 61 are arranged at the outer edge portions of the separators, for allowing increase and decrease of a space between separators, while sealing a gap between the separators.

Abstract: A method for mounting a seal in a fuel cell comprising: a membrane electrode assembly formed by holding an electrolyte membrane between a first electrode and a second electrode and having a seal mounting portion; a separator plate layered on both surfaces of the membrane electrode assembly so as to form gas passage; and a frame-shaped separator plate held between the membrane electrode assembly and the separator plate so as to seal the gas passage in air tight. The method comprises: preforming the seal into a predetermined shape; setting the seal at the mounting portion of the membrane electrode assembly; and integrally forming the seal with the membrane electrode assembly.

Abstract: The fuel cell of the present invention comprises: a membrane electrode assembly having a solid polymer electrolyte membrane, an anode side diffusion electrode (an anode electrode, and a second diffusion layer) disposed at one side of the solid polymer electrolyte membrane, and a cathode side diffusion electrode (a cathode electrode, and a first diffusion layer) disposed at the other side of the solid polymer electrolyte membrane; a pair of separators which hold the membrane electrode assembly; a projecting portion which extends from the solid polymer electrolyte membrane and which projects from the peripheries of the anode side diffusion electrode and the cathode side diffusion electrode; and a seal, provided on the separators, which was liquid sealant at the time of application. The seal makes contact with the projecting portion while the membrane electrode assembly is disposed between the separators.

Abstract: A fuel cell is provided where assembly of the seals is facilitated and excellent sealability and miniaturization becomes possible. This is achieved by a fuel cell (N) where an electrode film structure (12) having an anode electrode (A) provided on one side of a solid polymer electrolyte film (15), and a cathode electrode (C) provided on the other side thereof is clamped with an anode-side separator (13) and a cathode-side separator (14), wherein a groove (38) is provided in a surface (13a, 14a) of each separator (13) and (14) corresponding to the outer peripheral portion of the anode electrode (A) or the cathode electrode (C), and a seal (S1) having a circular shape in cross-section and with a fin (F) is provided in this groove (38).

Abstract: A fuel cell includes a membrane electrode assembly having a solid polymer electrolyte membrane, an anode side diffusion electrode and a cathode side diffusion electrode located at both sides of the solid polymer electrolyte membrane, and a pair of separators which holds the membrane electrode assembly. The fuel cell also includes a first seal and a second seal. The first seal is disposed between one of the separators and a periphery portion of whichever of the anode side diffusion electrode and the cathode side diffusion electrode has the larger surface area so as to surround whichever of the anode side diffusion electrode and the cathode side diffusion electrode has the smaller surface area. The second seal is disposed between the separators so as to surround whichever of the anode side diffusion electrode and the cathode side diffusion electrode has the larger surface area.

Abstract: The fuel cell of the present invention comprises: a membrane electrode assembly having a solid polymer electrolyte membrane, an anode side diffusion electrode located at one side of the solid polymer electrolyte membrane, and a cathode side diffusion electrode located at the other side of the solid polymer electrolyte membrane, the anode side diffusion electrode comprising an anode electrode, and a first gas diffusion layer, the cathode side diffusion electrode comprising a cathode electrode, and a second gas diffusion layer; a pair of separators which hold the membrane electrode assembly; and a seal, provided onto the separators, which was liquid sealant at the time of application. The sealant makes contact with at least one of end faces of the first gas diffusion layer and the second gas diffusion layer, while the membrane electrode assembly is located between the separators.

Abstract: A canister is provided for preventing the emanation of a vaporized fuel gas. The canister is capable of quickly heating the activated carbon through the resistance thereof up to a required temperature at the time of desorption of the vaporized fuel gas. The canister comprises a container having a vaporized fuel gas inlet port and an exit port. An aggregate of activated carbon is filled in the container to adsorb the vaporized fuel gas, and at least a pair of electrodes are provided for heating the activated carbon through the resistance thereof, at the time of desorption of the vaporized fuel gas. A highly electrically conductive activated carbon is used having an electric resistance of not larger than 500 .OMEGA./2.5.sup.3 cm.sup.3.

Abstract: A method of sealing electric parts mounted in a bare state on an electric wiring board uses a liquid sealing resin as a printing ink and a screen serving as screen printing means and having apertures in the same pattern as the electric parts mounted on the board. The lower end of a peripheral wall of the screen defining each of the apertures is substantially brought into line-to-line contact with the surface of the board for screen printing. The screen has a recess formed on the rear side of the line contact portion thereof and surrounding the contact portion. These features prevent the printing ink from adhering to the rear side of the screen and the collapse of the sealing resin layer that would occur if the ink adheres to the screen rear sides.