A fuel cell FC that includes a cell structure including an anode electrode, a cathode electrode, and an electrolyte that intervenes between the anode electrode and the cathode electrode; and a pair of separators that forms an anode gas flow area and a cathode gas flow area between the cell structure and an anode-side separator and a cathode-side separator of the pair of separators, respectively. The fuel cell further includes a first sealing portion and a second sealing portion that are disposed on an anode electrode side of the cell structure to enclose respectively the anode gas flow area and an outer periphery of the first sealing portion. A flow path for oxygen-containing gas is formed between the first sealing portion and the second sealing portion.

A fuel cell FC that includes a cell structure including an anode electrode, a cathode electrode, and an electrolyte that intervenes between the anode electrode and the cathode electrode; and a pair of separators that forms an anode gas flow area and a cathode gas flow area between the cell structure and an anode-side separator and a cathode-side separator of the pair of separators, respectively. The fuel cell further includes a first sealing portion and a second sealing portion that are disposed on an anode electrode side of the cell structure to enclose respectively the anode gas flow area and an outer periphery of the first sealing portion. A flow path for oxygen-containing gas is formed between the first sealing portion and the second sealing portion.

A fuel cell column includes first and second fuel cell stacks, a fuel manifold disposed between the first and second fuel cell stacks and configured to provide fuel to the first and second fuel cell stacks, and first and second dielectric separators located between the fuel manifold and the respective first and second fuel cell stacks, and configured to electrically isolate the respective first and second fuel cell stacks from the fuel manifold. The first and second dielectric separators each include a top layer of a ceramic material, a bottom layer of the ceramic material, a middle layer disposed between the top and bottom layers and including a material having a lower density and a higher dielectric strength than the ceramic material, and glass or glass ceramic seals which connect the middle layer to the top and bottom layers.

An electrochemical module including, a stack obtained by stacking, in a predetermined stacking direction, a plurality of electrochemical elements having a configuration in which an electrode layer, an electrolyte layer, and a counter electrode layer are formed along a substrate, via an annular sealing portion through which first gas, that is one of reducing component gas and oxidative component gas, flows; a container including an upper cover for pressing a first flat face in the stacking direction of the stack and a lower cover for pressing a second flat face on a side opposite to the first flat face, the stack clamped between the upper cover and the lower cover; an elastic lower plate-like member arranged between the first flat face and the upper cover; and a first gas supply portion and a first gas discharge portion connected to the second flat face in communication with the annular sealing portion.

A bipolar plate has a first inlet port and a flow field comprising a plurality of ducts to connect the first inlet port to a first outlet port for a first reactant, and has a second inlet port and a flow field comprising a plurality of ducts to connect the second inlet port to a second outlet port for a second reactant, wherein at least one bypass duct is present at the margin of at least one of the flow fields. The bypass duct is associated with at least one flow connection branching off from the bypass duct into an adjacent marginal duct of the flow field.

The invention provides a laminated body for fuel cell having an outer peripheral shape corresponding to an outer peripheral shape of a fuel battery cell and including a resin substrate film and a heat seal layer disposed on each of both surfaces of the resin substrate film, wherein the resin substrate film has a storage elastic modulus of 2,000-8000 MPa, an average thickness of 30-300 μm, a maximum value T1.sub.max and a minimum value T1.sub.min of a thickness of the resin substrate film that satisfies the relationship of T1.sub.max−T1.sub.min≤12 μm, and a maximum value T2.sub.max and a minimum value T2.sub.max of an average value of thicknesses of the resin substrate film that satisfies the relationship of T2.sub.max−T2.sub.min≤6 μm, and wherein the heat seal layer has an average thickness of 25-100 μm.

Disclosed are: a humidifier for a fuel cell, which can reliably prevent gas leaks due to repeated operations and shutdowns of a fuel cell and can be manufactured with relatively low manufacturing costs and high productivity as well; and a method for manufacturing same. A humidifier for a fuel cell of the present invention comprises a humidification module and caps coupled to both ends of the humidification module, respectively. The humidification module comprises: a mid-case having a step on the inner peripheral surface thereof; a plurality of hollow fiber membranes in the mid-case; a fixation layer on which ends of the hollow fiber membranes are potted; a bracket which is supported by the step of the mid-case and is in contact with the fixation layer; and a packing member in contact with the bracket and having a groove into which an end of the mid-case is inserted.

Disclosed are: a humidifier for a fuel cell, which can reliably prevent gas leaks due to repeated operations and shutdowns of a fuel cell and can be manufactured with relatively low manufacturing costs and high productivity as well; and a method for manufacturing same. A humidifier for a fuel cell of the present invention comprises a humidification module and caps coupled to both ends of the humidification module, respectively. The humidification module comprises: a mid-case having a step on the inner peripheral surface thereof; a plurality of hollow fiber membranes in the mid-case; a fixation layer on which ends of the hollow fiber membranes are potted; a bracket which is supported by the step of the mid-case and is in contact with the fixation layer; and a packing member in contact with the bracket and having a groove into which an end of the mid-case is inserted.

A fluid flow field of a separator of a fuel cell stack allows a fluid to flow in a separator surface direction. A rubber seal member provides a seal between the fluid passage and the fluid flow field. The tunnel portion intersects the rubber seal member at an intersection. The tunnel portion allows the fluid flow field and the fluid passage to connect to each other. In the rubber seal member, a first portion protrudes from a flat portion in a stacking direction, and a second portion protrudes from a protruding end surface of a tunnel portion in the stacking direction.

A fluid flow field of a separator of a fuel cell stack allows a fluid to flow in a separator surface direction. A rubber seal member provides a seal between the fluid passage and the fluid flow field. The tunnel portion intersects the rubber seal member at an intersection. The tunnel portion allows the fluid flow field and the fluid passage to connect to each other. In the rubber seal member, a first portion protrudes from a flat portion in a stacking direction, and a second portion protrudes from a protruding end surface of a tunnel portion in the stacking direction.