FUEL CELL STACK

摘要

The invention relates to a fuel cell stack which is composed of several individual fuel cells that are stacked on top of each other. Each of said fuel cells comprises a cathode-electrolyte-anode unit ( 7 ) and a perforated film ( 1 ) which distributes a combustible gas across the first electrode surface thereof, supports the cathode-electrolyte-anode unit ( 7 ), and is combined into a cassette ( 4 ) that is provided with a hollow space along with an additional structure ( 3 ). The combustible gas reaches the first electrode ( 7 A) via said cassette ( 4 ). The side of each cassette ( 4 ), which is located opposite the cathode-electrolyte-anode unit ( 7 ), is provide with a structure for distributing atmospheric oxygen across the surface of the second electrode of a neighboring cassette such that the stack is formed by several superimposed cassettes ( 4 ), between the film ( 1 ) of which a cathode-electrolyte-anode unit ( 7 ) and the structure for distributing atmospheric oxygen across the surface of the second electrode are disposed along with the additional structure ( 3 ). In order to brace the individual cassettes against each other in a housing or similar, the inventive stack comprises at least one bracing cassette, the walls of which are impermeable and which is filled with a material that expands to a relatively great extent when being heated.