Importance

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Abstract

A button-type battery includes, a) an anode; b) a cathode positioned adjacent to the anode; c) an electrolyte between the anode and the cathode; d) a conductive first terminal housing member in electrical contact with one of the anode or the cathode; the first terminal housing member having a periphery; e) a conductive second terminal housing member in electrical contact with the other of the anode or the cathode; the second terminal housing member having a periphery; f) the first and second terminal housing members forming an enclosed housing which holds and protects the anode, the cathode and the electrolyte; and g) the first and second terminal housing member peripheries being configured together to form an electrically insulative seal which seals the anode, the electrolyte and the cathode within the housing formed by the first and second terminal housing members, the electrically insulative seal comprising cross-linked butyl rubber. The seal can include a gasket which constitutes the cross-linked butyl rubber or other material. The seal can comprise an uncured precursor to butyl rubber. Methods of forming such button-type batteries include in situ curing or forming butyl rubber in place on one of the battery terminals. Alternately, a butyl rubber precursor can be applied to one or both of the battery terminals.

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First Claim