Abstract: A fuel cell system capable of preventing the decrease in the amount of coolant is provided. The fuel cell system is provided with: a power generation portion; a coolant flow passage through which a coolant flows that cools the power generation portion; a tank disposed on the coolant flow passage in a position below the power generation portion in the vertical direction and storing the coolant; an air flow passage connecting the uppermost part of the coolant flow passage in the vertical direction and the tank; and an on-off valve provided on the air flow passage. By the on-off valve being opened, the air in the tank is introduced into the coolant flow passage through the air flow passage, and the coolant in the coolant flow passage is introduced into the tank. Since the coolant flow passage never communicates with the atmosphere, the vaporized coolant is prevented from being released to the atmosphere, so that the decrease in the amount of coolant can be prevented.

Abstract: A fuel cell system capable of preventing the decrease in the amount of coolant is provided. The fuel cell system is provided with: a power generation portion; a coolant flow passage through which a coolant flows that cools the power generation portion; a tank disposed on the coolant flow passage in a position below the power generation portion in the vertical direction and storing the coolant; an air flow passage connecting the uppermost part of the coolant flow passage in the vertical direction and the tank; and an on-off valve provided on the air flow passage. By the on-off valve being opened, the air in the tank is introduced into the coolant flow passage through the air flow passage, and the coolant in the coolant flow passage is introduced into the tank. Since the coolant flow passage never communicates with the atmosphere, the vaporized coolant is prevented from being released to the atmosphere, so that the decrease in the amount of coolant can be prevented.

Abstract: An example separator includes: a flat plate-shaped first plate member; a flat plate-shaped second plate member joined with the first plate member; an oxidation gas flow channel wall, which forms a flow channel of oxidation gas; a fuel gas flow channel wall, which forms a flow channel of fuel gas; a cooling medium flow channel wall, which forms a flow channel of a cooling medium; a first through hole, which penetrates the first plate member and the second plate member; a second through hole, which penetrates the first plate member and the second plate member; a first cooling medium passage part; a second cooling medium passage part; one projection, which is formed on at least one of the first cooling medium passage part and the second cooling medium passage part; and another projection, which is formed at a position corresponding to the one projection.

Abstract: To provide: a fuel cell, with which the level of contamination of a cooling passage becomes lower, lowering of the power generation efficiency of the power generation unit due to rise in the conductivity of the heat medium is suppressed, it is possible to control the heat radiation amount, and it is possible to use a common fan as a fan for ventilation and a fan for a radiator; a control method of controlling heat exchange in a fuel cell; and a computer readable recording medium storing a computer program for causing a computer to execute control processing of heat exchange.

Abstract: A separator of a fuel cell may have a planer shape, may be provided on one surface of a membrane electrode assembly, and may include a first protrusion formed over a region between a first position which is provided a first distance apart from a first hole being pierced in the separator and a second position which is provided a second distance apart from a second hole being pierced in the separator on a first surface opposed to the membrane electrode assembly, the first protrusion abutting the membrane electrode assembly. The separator further may include a second protrusion formed over a region at least between the first position and the second hole on the first surface, the second protrusion abutting the electrode membrane assembly between the first position and the second position.

Abstract: An example separator includes: a flat plate-shaped first plate member; a flat plate-shaped second plate member joined with the first plate member; an oxidation gas flow channel wall, which forms a flow channel of oxidation gas; a fuel gas flow channel wall, which forms a flow channel of fuel gas; a cooling medium flow channel wall, which forms a flow channel of a cooling medium; a first through hole, which penetrates the first plate member and the second plate member; a second through hole, which penetrates the first plate member and the second plate member; a first cooling medium passage part; a second cooling medium passage part; one projection, which is formed on at least one of the first cooling medium passage part and the second cooling medium passage part; and another projection, which is formed at a position corresponding to the one projection.

Abstract: A separator having planar shape may comprise a second inner wall and a third inner wall formed inside of the separator and disposed between a first hole and a plurality of first inner walls. The second inner wall and the third inner walls may comprise a plurality of first grooves formed inside of the separator and a plurality of first concaves facing the plurality of first grooves inside of the separator. Each of the plurality of first grooves extends between the first hole and the plurality of first inner walls along a first direction. Each of the plurality of first concaves curves outward from inside of the separator and extends between one of the plurality of first grooves and other of the plurality of first grooves.

Abstract: A separator of planar shape includes a plurality of grooves which are formed in a first surface of the separator serving as one surface facing a membrane electrode assembly and which extend along a first direction parallel to the first surface. The separator includes a protrusion formed in the first surface and enclosing a first hole, a second hole, and the plurality of grooves. The separator includes a cutout part located between two third holes adjacent to each other and formed by the one outer edge part of the separator approaching the protrusion and the plurality of grooves in a second direction. A collecting electrode plate includes: a cutout part formed at a position corresponding to the cutout part of the separator; and a terminal part extending from the cutout part of the collecting electrode plate toward the second direction.

Abstract: A separator of a fuel cell may comprise: a first groove portion formed between a first hole and a second hole on a first surface of the separator; a second groove portion formed between a third hole and a fourth hole on a second surface of the separator; a first protrusion portion formed on the first surface and surrounding the first groove portion and the first, second, third and fourth holes; a second protrusion portion formed on the second surface and surrounding the second groove portion and the first, second, third and fourth holes; and third protrusion portions formed between fifth holes and an edge of the separator on the first and second surfaces, the fifth holes being formed between the edge of the separator and an area corresponding to a region surrounded by the first protrusion portion and a region surrounded by the second protrusion portion.

Abstract: A separator of a fuel cell may have a planer shape, may be provided on one surface of a membrane electrode assembly, and may include a first protrusion formed over a region between a first position which is provided a first distance apart from a first hole being pierced in the separator and a second position which is provided a second distance apart from a second hole being pierced in the separator on a first surface opposed to the membrane electrode assembly, the first protrusion abutting the membrane electrode assembly. The separator further may include a second protrusion formed over a region at least between the first position and the second hole on the first surface, the second protrusion abutting the electrode membrane assembly between the first position and the second position.

Abstract: A separator having planar shape may comprise a second inner wall and a third inner wall formed inside of the separator and disposed between a first hole and a plurality of first inner walls. The second inner wall and the third inner walls may comprise a plurality of first grooves formed inside of the separator and a plurality of first concaves facing the plurality of first grooves inside of the separator. Each of the plurality of first grooves extends between the first hole and the plurality of first inner walls along a first direction. Each of the plurality of first concaves curves outward from inside of the separator and extends between one of the plurality of first grooves and other of the plurality of first grooves.