Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Cell enclosure structure – e.g. – housing – casing – container,...
Patent
1978-07-31
1979-08-28
Walton, Donald L.
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Cell enclosure structure, e.g., housing, casing, container,...
296232, H01M 208
Patent
active
041661575
ABSTRACT:
A novel button cell having a corrosion resistant can and being double sealable is described. The cell is basically made of four components, a conductive metal can, a conductive thermoplastic layer in the can, a conductive metal cover and a dielectric thermoplastic gasket molded around the cover. The conductive thermoplastic layer is disposed on the inner surfaces of the can so as to extend over at least all of the inner surface of the bottom of the can. The conductive metal cover has a sidewall which includes a U-shape configuration, and the dielectric thermoplastic gasket is insert molded around the sidewall of the cover and a part of the top of the cover so as to extend over all surfaces of the cover except a center portion, inner and outer surfaces, of the top of the cover. The dielectric thermoplastic gasket has a tapered projection located below the U-shape configuration. The combination of the conductive metal cover and the dielectric thermoplastic gasket has a total height which is less than the height of the sidewall of the can and is adapted so as to cooperate with and fit into the can. A method of double sealing this cell is also described. This involves the establishment of a dielectric plastic to conductive plastic weld between the gasket and the conductive thermoplastic layer to form the first seal, and a subsequent crimping of the can wall over the gasket to form the second seal.
REFERENCES:
patent: 2812377 (1957-11-01), Franquemont
patent: 3480481 (1969-11-01), Gauthier et al.
patent: 3791873 (1974-02-01), Angelovich
Exxon Research & Engineering Co.
Glynn Kenneth P.
Walton Donald L.
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