A bipolar plate arrangement comprises a first plate portion and a separate second plate portion juxtaposed and connected to one another, the first plate portion and the second plate portion defining a plurality of aligned port apertures. An inner seal is positioned between the first plate portion and the second plate portion, the inner seal, the first plate portion, and the second plate portion together defining a plurality of fluid passages providing fluid communication between the port apertures and a corresponding fluid aperture defined in one of the first plate portion or the second plate portion.

The fuel cell includes a resin frame body having an opening portion, a membrane electrode assembly disposed in the opening, and a first separator and a second separator opposed to each other via the frame body and the membrane electrode assembly. A first manifold hole is formed in the frame body, the first separator, and the second separator. A plurality of first gas passages extending from the first manifold hole to the membrane electrode assembly are opened in a first region that is a part of the inner peripheral face of the first manifold hole. The first gas passages are formed between the frame body and the first separator. In the first region, in the cross section passing through the central axis of the first manifold hole, the inner wall face of the first separator protrudes toward the central axis side than the inner wall face of the frame body.

The fuel cell includes a resin frame body having an opening portion, a membrane electrode assembly disposed in the opening, and a first separator and a second separator opposed to each other via the frame body and the membrane electrode assembly. A first manifold hole is formed in the frame body, the first separator, and the second separator. A plurality of first gas passages extending from the first manifold hole to the membrane electrode assembly are opened in a first region that is a part of the inner peripheral face of the first manifold hole. The first gas passages are formed between the frame body and the first separator. In the first region, in the cross section passing through the central axis of the first manifold hole, the inner wall face of the first separator protrudes toward the central axis side than the inner wall face of the frame body.

An electrochemical cell assembly (300, 500) comprising a base plate (308) and a top plate (303) between which a stack of planar cell units (306) and at least one positive (302, 507) and at least one negative electrical end plate (302, 507) are disposed in compression by means of compression means (307) acting between the base plate (308) and top plate (303). At least one of the electrical end plates (302, 507) is connected or integrally formed with, and in electrical contact with, an electrical stud (301, 505) that extends from a base portion of the at least one electrical end plate (302, 507) and passes through an opening in one of the base plate (308) and top plate (303) to form an electrical terminal. A fluidic seal is maintained by the compression means (307) between the base portion and the respective one of the base plate (308) and top plate (303), so as to prevent loss of fluid through the opening.

An electrochemical cell assembly (300, 500) comprising a base plate (308) and a top plate (303) between which a stack of planar cell units (306) and at least one positive (302, 507) and at least one negative electrical end plate (302, 507) are disposed in compression by means of compression means (307) acting between the base plate (308) and top plate (303). At least one of the electrical end plates (302, 507) is connected or integrally formed with, and in electrical contact with, an electrical stud (301, 505) that extends from a base portion of the at least one electrical end plate (302, 507) and passes through an opening in one of the base plate (308) and top plate (303) to form an electrical terminal. A fluidic seal is maintained by the compression means (307) between the base portion and the respective one of the base plate (308) and top plate (303), so as to prevent loss of fluid through the opening.