The disclosure relates to a proton exchange membrane fuel cell. The fuel cell includes: a container, wherein the container includes a reacting room, a fuel room connected to the reacting room through a fuel inputting hole, a fuel inputting door located on the fuel inputting hole, a waste collecting room connected to the reacting room through a waste outputting hole, a waste outputting door located on the waste outputting hole; a membrane electrode assembly device located in the reacting room, wherein the reacting room is divided into an anode electrode space and a cathode electrode space connected to the outside through a pipe, the volume of the anode electrode space and the cathode electrode space can be changed by moving the membrane electrode assembly device.

A sealing assembly for a fuel cell system and a method of assembling a fuel cell system. The system is made up of numerous fluid-conveying plate assemblies stacked such that seals are placed between adjacent plates. Microseals are disposed on one or both of metal beads and subgaskets such that when fuel cells comprising such metal beads, microseals and gaskets are aligned and compressed into a housing of a fuel cell stack, the leakage impacts of any misalignment in the cells is reduced. In particular, variations in microseal design including geometric and material properties such as microseal aspect ratio, Poisson's Ratio and as-deposited shape may be tailored to provide optimum sealing between facing metal beads and subgaskets.

In a method of producing a fuel cell stack, press forming of a first metal separator of a power generation cell is performed to thereby form a first seal line as a seal around at least an oxygen-containing gas flow field. Further, a preliminary load is applied to the first seal line to thereby plastically deform the first seal line. Further, a joint separator and a membrane electrode assembly are stacked together, and a tightening load is applied to the joint separator and the membrane electrode assembly in a stacking direction, to thereby assemble the fuel cell stack.

A separator assembly for an air-cooled fuel cell includes: a cathode separator and an anode separator, each of which having a cooling surface bonded to each other to face each other. The separator assembly further includes a plurality of first gaskets having a ring shape configured to surround and seal a plurality of inlet manifolds and a plurality of outlet manifolds are disposed on a cooling surface of any one separator among the cooling surface of the cathode separator and the cooling surface of the anode separator. The plurality of first gaskets are configured to allow cooling air for cooling the cooling surface to flow between first gaskets adjacent to each other.

A frame gasket may include a flat base, which is positioned along the edge of stack constitutional parts and which includes a first elastic base and reinforced fibers mixed therein to ensure sealing of a fuel cell stack, and first projection units, which project over the base and which include a second elastic base.

A variable back-up ring includes: a first half shell; a second half shell having a symmetrical shape to the first half shell; and an inner cavity defined by the first half shell and the second half shell. The first half shell and the second half shell are deformable depending on a magnitude of a fluid pressure acting on the first half shell and the second half shell.

A plate includes a planar portion and a circular bead, or circular bead seal, that is offset from the planar portion. An axis is substantially perpendicular to the planar portion, and the circular bead arcs about the axis. The axis may be defined by a hole through the planar portion that is substantially surrounded by the circular bead. One or more displacement absorption tunnels is offset from the planar portion and extends radially relative to the axis. Each of the displacement absorption tunnels intersects the circular bead. In some configurations the displacement absorption tunnels may have an arcuate shape, and in some configurations the displacement absorption tunnels may have a trapezoidal shape. A plurality of plates having similar, though not identical, features may be stacked together.

Implementation of an interconnector structure for an SOEC or SOFC electrochemical device, the interconnector being formed of a conductive support element having a first face with a rough region, the roughness of which has been modified locally before being brought into contact with a seal.

A sealing arrangement is provided for an electrochemical cell. The sealing arrangement includes a metallic plate (7) and a seal (18, 19) which is arranged thereon and which forms at least one closed sealing ring, which is arranged on the plate (7). A peripheral inner support structure (20, 22) supports the seal (18, 19) to the inside and an outer support structure (21, 23) supports the seal (18, 19) to the outside. The support structures are formed of sintered metal and are materially connected to the plate (7).

A metal-supported, SOEC or SOFC fuel cell unit (10) comprising a separator plate (12) and metal support plate (14) with chemistry layers (50) overlie one another to form a repeat unit, at least one plate having flanged perimeter features (18) formed by pressing the plate, the plates being directly adjoined at the flanged perimeter features to form a fluid volume (20) between them and each having at least one fluid port (22), wherein the ports are aligned and communicate with the fluid volume, and at least one of the plates has pressed shaped port features (24) formed around its port extending towards the other plate and including elements spaced from one another to define fluid pathways to enable passage of fluid from the port to the fluid volume. Raised members (120) may receive a gasket (34), act as a hard stop or act as a seal bearing surface.