Short protection device for stack of electrolytic cells

Details Short protection device for stack of electrolytic cells Short protection device for stack of electrolytic cells

1984-11-29

1985-10-22

Walton, Donald L.

Chemistry: electrical current producing apparatus, product, and

Having magnetic field feature

429 35, H01M 824

Patent

active

045488746

ABSTRACT:
Electrical short protection is provided in an electrolytic cell stack by the combination of a thin, nonporous ceramic shield and a noble metal foil disposed on opposite sides of the sealing medium in a gas manifold gasket. The thin ceramic shield, such as alumina, is placed between the porous gasket and the cell stack face at the margins of the negative end plate to the most negative cells to impede ion current flow. The noble metal foil, for instance gold, is electrically coupled to the negative potential of the stack to collect positive ions at a harmless location away from the stack face. Consequently, corrosion products from the stack structure deposit on the foil rather than on the stack face to eliminate electrical shorting of cells at the negative end of the stack.

REFERENCES:
patent: 3798142 (1974-03-01), Evans
patent: 4377445 (1983-03-01), Grimes
patent: 4414294 (1983-11-01), Guthrie
patent: 4465742 (1984-08-01), Nagashima et al.
patent: 4467018 (1984-08-01), Schroll
Development of Molten Carbonate Fuel Cell Power Plant Technology, Quarterly Technical Progress Report No. 16, Oct. 1983.

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