A fuel cell has a tunnel protruding from a passage bead seal toward a passage to thereby allow an internal space of the passage bead seal to communicate with the passage, and an extending portion located on a side of the tunnel so as to extend from the passage bead seal toward the passage, the extending portion being lower in height than the tunnel.

A fuel cell has a tunnel protruding from a passage bead seal toward a passage to thereby allow an internal space of the passage bead seal to communicate with the passage, and an extending portion located on a side of the tunnel so as to extend from the passage bead seal toward the passage, the extending portion being lower in height than the tunnel.

The present invention relates to a fuel cell and a fuel cell stack comprising the same, and according to one aspect of the present invention, there is provided a fuel cell comprising a membrane-electrode assembly having a first surface and a second surface opposite to the first surface, wherein an anode electrode and a cathode electrode are each disposed on the first surface; an end plate disposed apart at a predetermined interval on the second surface; a first gas diffusion layer disposed on the anode electrode; a second gas diffusion layer disposed on the cathode electrode; a first separating plate disposed on the first gas diffusion layer and having a plurality of flow channels; and a second separating plate disposed on the second gas diffusion layer and having a plurality of flow channels.

The present invention relates to a fuel cell and a fuel cell stack comprising the same, and according to one aspect of the present invention, there is provided a fuel cell comprising a membrane-electrode assembly having a first surface and a second surface opposite to the first surface, wherein an anode electrode and a cathode electrode are each disposed on the first surface; an end plate disposed apart at a predetermined interval on the second surface; a first gas diffusion layer disposed on the anode electrode; a second gas diffusion layer disposed on the cathode electrode; a first separating plate disposed on the first gas diffusion layer and having a plurality of flow channels; and a second separating plate disposed on the second gas diffusion layer and having a plurality of flow channels.

A fuel cell separator includes a separator main body having a first surface and a second surface, and a first seal member disposed on the first surface. When a region on the first surface of the separator main body corresponding to an electrode member disposed on the second surface is defined as a power generation region, and a region on the first surface of the separator main body corresponding to an in-cell seal member is defined as a seal region, a displacement/vibration reducing member made of polymer is disposed at a part of the seal region. The displacement/vibration reducing member includes multiple protrusions and a coupling portion. When viewed in plan view, an axis line connecting the centers of the figures of the adjacent protrusions does not coincide with a center line passing through the widthwise center of the coupling portion. The coupling portion has a gate cut mark.

A fuel cell separator includes a separator main body having a first surface and a second surface, and a first seal member disposed on the first surface. When a region on the first surface of the separator main body corresponding to an electrode member disposed on the second surface is defined as a power generation region, and a region on the first surface of the separator main body corresponding to an in-cell seal member is defined as a seal region, a displacement/vibration reducing member made of polymer is disposed at a part of the seal region. The displacement/vibration reducing member includes multiple protrusions and a coupling portion. When viewed in plan view, an axis line connecting the centers of the figures of the adjacent protrusions does not coincide with a center line passing through the widthwise center of the coupling portion. The coupling portion has a gate cut mark.

A metal pole plate sealing structure for a fuel cell is disclosed, as well as a fuel cell using this structure. The metal pole plate sealing structure for a fuel cell includes a metal pole plate, a membrane electrode assembly and a sealing rubber body. The metal pole plate has a sealing rubber groove. The sealing rubber body is accommodated in the sealing rubber groove. The sealing rubber groove, the sealing rubber body and a frame of the membrane electrode assembly cooperate with each other to seal an internal space enclosed when the metal pole plate and the membrane electrode assembly are pressed together. An inner surface of the sealing rubber groove has a positioning unit which makes it easier to fix an installation position of the sealing rubber body in the sealing rubber groove.

A metal pole plate sealing structure for a fuel cell is disclosed, as well as a fuel cell using this structure. The metal pole plate sealing structure for a fuel cell includes a metal pole plate, a membrane electrode assembly and a sealing rubber body. The metal pole plate has a sealing rubber groove. The sealing rubber body is accommodated in the sealing rubber groove. The sealing rubber groove, the sealing rubber body and a frame of the membrane electrode assembly cooperate with each other to seal an internal space enclosed when the metal pole plate and the membrane electrode assembly are pressed together. An inner surface of the sealing rubber groove has a positioning unit which makes it easier to fix an installation position of the sealing rubber body in the sealing rubber groove.

A fuel cell includes: a membrane electrode assembly (MEA); a first separator stacked on a first surface of the membrane electrode assembly; a second separator stacked on a second surface of the membrane electrode assembly; a first sealing member disposed on the first separator and configured to seal a space between the first separator and the membrane electrode assembly; a second sealing member disposed on the second separator and configured to seal a space between the second separator and the membrane electrode assembly; and a fastening part configured to fasten the first sealing member to the second sealing member.

The fuel cell comprises for each MEA: an anodic volume for the circulation of an anodic fluid between the anode of the MEA and a bipolar plate and a cathodic volume for the circulation of a cathodic fluid between the anode of the MEA and another bipolar plate, one of the anodic volume and the cathodic volume is sealed by a cordon of a sealing material extending along a peripheral outer edge of the MEA, wherein the sealing material is in direct contact with the MEA and the corresponding bipolar plate; wherein the other of the anodic volume and the cathodic volume is sealed off from the fluid circulating in the volume by a direct contact line of the MEA with the corresponding bipolar plate, the contact line extending along a peripheral outer edge of the MEA.