Abstract: The present invention relates to a separator and a fuel cell stack comprising the same, and according to one aspect of the present invention, there is provided a separator comprising: a plurality of riblet elements arranged to be spaced apart at a predetermined interval; and a plurality of connecting bars connecting two adjacent riblet elements, wherein each of the riblet elements comprises a contact portion having a predetermined area, and a first partition wall and a second partition wall each extended from both sides of the contact portion, the space formed by the first partition wall, the contact portion and the second partition wall is opened along the connection direction of the connecting bar, and at least two riblet elements are provided such that each of the contact portions has a different area.

Abstract: The present invention relates to a separation plate, a manufacturing method therefor, and a fuel cell stack comprising the same, and according to one aspect of the present invention, provided is a separation plate having: a first surface and a second surface in a direction opposite to that of the first surface; a plurality of channel elements protruding from the second surface toward the first surface, wherein each of the channel elements is arranged to have an inlet port and an outlet port along the flowing direction of a fluid flowing on the first surface; and a rib having a height varying along the circumferential direction of a virtual axis connecting the inlet port and the outlet port, wherein at least a partial region of an outer surface of the rib is formed into a cycloid curved surface along the circumferential direction of the virtual axis.

Abstract: The present invention relates to a separating plate and a fuel cell stack including same. According to an embodiment of the present invention, a separating plate is provided defining a coolant passage capable of uniform coolant supply and heat recovery across all areas of a reaction region, the separating plate can easily regulate the temperature of a reaction surface, and a reduction in performance and durability due to thermal load can be prevented.

Abstract: The present invention relates to a separating plate, a method for manufacturing the same, and a fuel cell stack comprising the same. An aspect of the present invention provides a separating plate comprising: a plurality of channels extending in elongated shapes along a first direction, respectively; and a plurality of riblet elements provided to connect side walls of two adjacent channels along a second direction, which is perpendicular to the first direction, wherein the plurality of riblet elements, which connect side walls of two adjacent channels, are spaced by a predetermined interval along the first direction, and a separating plate, which is provided with a first opening, is provided between two riblet elements, which are adjacent to each other along the first direction.