Alkali metal cells and batteries and the manufacture thereof

Chemistry: electrical current producing apparatus – product – and – Fluid active material or two-fluid electrolyte combination... – Active material in molten state

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429181, H01M 202

Patent

active

044528710

ABSTRACT:
In a sodium sulphur cell having, within a metal housing, a ceramic electrolyte tube separating the liquid alkali metal from the cathodic reactant, a current collector extends into the region inside the electrolyte tube and is electrically insulated from the electrolyte by an insulating element. The metal housing is sealed to the insulating element in a region around the current collector which region has a maximum cross-section substantially less than the maximum cross-section of the electrolyte tube and preferably lies wholly within the outer periphery of the electrolyte tube. The small seal areas with the constructions described give improved economy and reliability. The constructon has particular advantages with cells of short length.

REFERENCES:
patent: 3932195 (1976-01-01), Evans et al.
patent: 3982959 (1976-09-01), Partridge et al.
patent: 4020246 (1977-04-01), Seo et al.
patent: 4024321 (1977-05-01), Tilley
patent: 4038464 (1977-07-01), Baukal et al.
patent: 4238553 (1980-12-01), Weddigen et al.

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