Hermetically sealed button-type electrochemical cell and method

Details Hermetically sealed button-type electrochemical cell and method Hermetically sealed button-type electrochemical cell and method

1978-01-18

1980-01-08

Lanham, C. W.

Metal working

Method of mechanical manufacture

Electrical device making

429 57, 429 72, 429164, 429174, 429184, H01M 600, H01M 632

Patent

active

041820282

ABSTRACT:
An ultra-thin hermetically sealed button-type electrochemical cell is disclosed comprising a pair of mating metallic housing members, at least one of which is generally dish shaped to define an enclosed space therebetween. A peripheral opening defining a fill port is formed in one of the housing members, preferably at the junction formed by the mating surfaces. The interfacing surfaces of the cell housing members are welded together subsequent to the insertion of the internal cell components and prior to the addition of the electrolyte to form a hermetic seal. The electrolyte may then be added and the fill port hermetically sealed by welding. Owing to its relatively small size, the fill port may be quickly sealed so that the heat generated during the weld process is insufficient to volatilize the electrolyte. One of the housing members has a facial hole containing a glass-to-metal seal through which an electrically conductive metal terminal structure extends and located such that the heat of welding may be dissipated by the housing members without adversely affecting the glass-to-metal seal.

REFERENCES:
patent: 3057949 (1962-10-01), Prell, Jr.
patent: 3064065 (1962-11-01), Belove
patent: 3380857 (1968-04-01), Bilhorn
patent: 3427205 (1969-02-01), Plitt et al.
patent: 3982958 (1976-09-01), Newman
patent: 4011371 (1977-03-01), Hallett et al.

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