Solid oxide fuel cell stack, solid oxide fuel cell module, and solid oxide fuel cell system

摘要

PROBLEM TO BE SOLVED: To achieve both assemblability and conductivity in connecting a cylindrical solid oxide fuel cell and a connection member in a solid oxide fuel cell stack.SOLUTION: A solid oxide fuel cell stack 30 comprises a plurality of cylindrical solid oxide fuel cells 33 and a plurality of connection members 34. The connection member 34 comprises a first connection part 34a electrically connected to a connected part 33a1 of a fuel electrode layer, a second connection part 34b electrically connected to a connected part 33c2 of an air electrode layer, and a coupling part 34c coupling the first connection part 34a with the second connection part 34b. At least one of the first connection part 34a and the second connection part 34b is formed so that it serves as a structure in which one inner shape is deformable in a radial direction of the cylindrical solid oxide fuel cells 33 before and after being mounted on the connected part.