Solid oxide fuel cell stacking assembly

Details Solid oxide fuel cell stacking assembly Solid oxide fuel cell stacking assembly

1994-03-18

1995-10-24

Niebling, John

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

429 32, 429 34, 429 35, 429 38, H01M 214

Patent

active

054608970

ABSTRACT:
A solid oxide fuel cell stacking assembly is formed of a stack of fuel cell assemblies, manifolds to introduce the reactants to the fuel cell and carry away reaction products and unused reactants, and current collectors at the ends of the stack of assemblies. Each fuel cell assembly is formed of at least two fuel cell subassemblies and an interconnect subassembly disposed between each pair of fuel cell subassemblies. The current collectors at the ends of the stack are preferably in the form of terminal subassemblies. Each subassembly includes a manifold plate, an annular plate-type bellows sealed to a through-plate opening in the manifold plate, and a central element sealed to the inner diameter of the bellows. In the case of the fuel cell assembly, the central element is multilayer fuel cell plate having an electrolyte layer sandwiched between an anode layer and a cathode layer. In the case of the interconnect assembly and the terminal assembly, the central element is a metallic plate with protrusions that make contact to the adjacent fuel cell plate. The combination of the bellows and the protrusions accommodate dimensional changes within the fuel cell.

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