Patent ID: 9269971
Filing Date: 2016-02-23
CPC Classification: H01M,Y02E

Claim Text:
1. A flat-tubular solid oxide cell stack, comprising: at least three unit cells, each of the unit cells comprising: wherein each of the unit cells is selected from the group consisting of: (a) a unit cell in which connection holes passing through both sides of the cell, respectively, are formed at portions near both ends of the first-gas flow channel in the thickness direction of the cell and are formed in directions opposite to each other so as to be the first-gas flow channels of the cells adjacent thereto; (b1) a unit cell in which a hole passing through both sides of the cell is formed at a portion near one end of the first-gas flow channel in the thickness direction of the cell, and a connection hole passing through the upper side of the cell is formed at a portion near the other end in the thickness direction of the cell, the connection holes being connected with the first-gas flow channels of the cells adjacent thereto; (b2) a unit cell in which a hole passing through both sides of the cell is formed at a portion near one end of the first-gas flow channel in the thickness direction of the cell, and a connection hole passing through the lower side of the cell is formed at a portion near the other end in the thickness direction of the cell, the connection holes being connected with the first-gas flow channels of the cells adjacent thereto; and (c) a unit cell in which connection holes passing through both sides of the cell are formed at portions near both ends of the cell in the thickness direction of the cell so as to be connected with the first-gas flow channels of the cells adjacent thereto, wherein each of the lowest and uppermost unit cells among the unit cells of the cell stack is unit cell (a) and the lowest and uppermost unit cells have first-gas inlet and outlet manifolds through which the first gas passes, a sealing unit having a ring-shaped sealing material is formed outside of the connection holes, which communicate with the first-gas flow channels of the unit cells of the cell stack, so as to seal gas, a plurality of second-gas flow channels along which second gas flows in a direction perpendicular to the first-gas flow channel are formed on one outside of each of the unit cells, and a ceramic conductor is coated on the lower surface of each of the unit cells, which is opposite the surface having the second-gas flow channel.