Leak-proofing of button cells

Details Leak-proofing of button cells Leak-proofing of button cells

1980-04-14

1981-03-24

Skapars, Anthony

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Flat-type unit cell and specific unit cell components

429174, 429185, H01M 208

Patent

active

042581087

ABSTRACT:
Galvanic elements of button cell type are sealed against electrolyte escape by positioning a hydroxide binding material between the housing cup and the lid on that side of the synthetic plastic seal which is normally sealed off from contact with the electrolyte. This material can be positioned within a ring of matting which is protected from moisture by a coating of lacquer or a shrink tube. The hydroxide binding material for which solids such as B.sub.2 O.sub.3, As.sub.2 O.sub.3 or acid salts such as NaH.sub.2 PO.sub.4, Na.sub.2 H.sub.2 P.sub.2 O.sub.7 may be used, may also be positioned in encircling grooves provided in the sealing body itself.

REFERENCES:
patent: 3623915 (1971-11-01), Pun et al.
patent: 3713896 (1973-01-01), Feldhake
patent: 3891463 (1975-06-01), Karobath et al.
patent: 3990918 (1976-11-01), Bro et al.
patent: 4011371 (1977-03-01), Hallett et al.
patent: 4064329 (1977-12-01), Naylor
patent: 4122241 (1978-10-01), Ciliberti, Jr. et al.

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