A fuel cell according to the present disclosure includes separators 11 and 12 made of metal and having projection-depression shapes, and gas diffusion layers 13 and 14. Conductive particles 21 are buried in a projecting part on one surface of each of the separators 11 and 12, and carbon fibers 22 are buried in a projecting part on the other surface of each of the separators 11 and 12. The projecting parts on the one surfaces of the separators 11 and 12 abut against each other so that the conductive particles 21 buried in these projecting parts come into contact with each other. Further, the projecting parts on the other surfaces of the separators 11 and 12 abut against the gas diffusion layers 13 and 14, respectively, so that the carbon fibers 22 buried in these projecting parts come into contact with the gas diffusion layers 13 and 14, respectively.

In a production method and a production apparatus for producing a joint separator, in the state where first and second separators are stacked together, a step of fixing the first and second separators by holding the first and second separators between a base and a holder is performed. Thereafter, a step of welding the first and second separators by radiating a laser light from laser light emitting units, through gaps provided in the holder is performed. After the welding step, an additional pressing step of moving pressing members ahead through the gaps to press heat affected zones welded by the laser light, by the pressing members is performed.

In a production method and a production apparatus for producing a joint separator, in the state where first and second separators are stacked together, a step of fixing the first and second separators by holding the first and second separators between a base and a holder is performed. Thereafter, a step of welding the first and second separators by radiating a laser light from laser light emitting units, through gaps provided in the holder is performed. After the welding step, an additional pressing step of moving pressing members ahead through the gaps to press heat affected zones welded by the laser light, by the pressing members is performed.

A method of producing a separator plate for a fuel cell, for which at least one curable material provided with electrically conducting fillers is used including aligning the electrically conducting fillers by an electrical and/or magnetic field, and, subsequently, curing the material with the electrically conducting fillers in the aligned orientation.

A method of producing a separator plate for a fuel cell, for which at least one curable material provided with electrically conducting fillers is used including aligning the electrically conducting fillers by an electrical and/or magnetic field, and, subsequently, curing the material with the electrically conducting fillers in the aligned orientation.

A manufacturing method for manufacturing a separator for a fuel cell includes a step of applying a laser beam to a surface of a plate-shaped metal plate having a rectangular shape such that an application range of the laser beam extends linearly. In the step, the laser beam is applied such that the application range includes a high-energy region in which energy to be given by the laser beam per unit distance in a direction where the application range extends linearly is high, and a low-energy region in which the energy is low. The high-energy region includes a first region, a second region, a third region, and a fourth region. The first region and the second region extend in parallel to one of long sides of the rectangular shape. The third region and the fourth region extend in parallel to the other one of the long sides.

A manufacturing method for manufacturing a separator for a fuel cell includes a step of applying a laser beam to a surface of a plate-shaped metal plate having a rectangular shape such that an application range of the laser beam extends linearly. In the step, the laser beam is applied such that the application range includes a high-energy region in which energy to be given by the laser beam per unit distance in a direction where the application range extends linearly is high, and a low-energy region in which the energy is low. The high-energy region includes a first region, a second region, a third region, and a fourth region. The first region and the second region extend in parallel to one of long sides of the rectangular shape. The third region and the fourth region extend in parallel to the other one of the long sides.

A manufacturing method for manufacturing a fuel cell includes a laser application step and a bonding step. In the laser application step, a laser beam is applied to a carbon film of a separator including a metal plate and the carbon film covering a surface of the metal plate such that the metal plate is exposed by removing the carbon film within an application range of the laser beam. In the bonding step, the separator is bonded to a resin member within a range including at least part of a range where the metal plate is exposed.

A multiple perforation plate for fuel cell separators includes virtual flow path hole central lines spaced apart from each other at a constant interval in a length direction corresponding to a flow direction of reaction gas and formed in a width direction perpendicular to the flow direction of the reaction gas, a plurality of flow path holes formed at a constant interval on the flow path hole central lines in the width direction, and expansion parts formed at both sides of a middle point of each of the flow path holes in the width direction so as to have a greater width in the length direction than that of other points of each of the flow path holes.

An anode of a fuel cell has an anode current collector defining an inlet configured to receive fuel gas and an outlet configured to output the fuel gas, a barrier that divides an active area of the anode current collector into a first area and a second area, and a flow passage configured to allow a flow of fuel gas from the inlet through the first area and the second area to the outlet. An obstacle is located in the flow passage in an inactive area of the anode current collector and is configured to change a flow direction of the fuel gas in the flow passage from the first area to the second area to achieve intra-cell mixing of the fuel gas.