Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation
Patent
1975-10-06
1977-08-09
Mack, John H.
Chemistry: electrical current producing apparatus, product, and
With pressure equalizing means for liquid immersion operation
H01M 208
Patent
active
040412113
ABSTRACT:
An improved substantially leak-proof button cell, particularly adapted for use in hearing aids, comprising an outer cathode can and an inner anode can containing a zinc electrode material, preferably a zinc paste, the inner can being positioned within the outer can, with the outer wall of the inner can spaced from the inner wall of the outer can, a polymeric seal, preferably a polypropylene seal, positioned between the outer wall of the inner can and the inner wall of the outer can, the outer wall of the inner can having a coating of an alkali resistant elastomer or elastomeric adhesive, e.g. a self-curing butyl elastomer modified by a phenolic resin, which is pressure sensitive and having the property of deforming when subjected to pressure without cracking or forming voids, a catalyst electrode on a flexible and permeable, preferably polytetrafluoroethylene, membrane and including a current collector, positioned between the polymeric seal and the inner wall of the outer can, and a separator between the zinc electrode material and the catalyst electrode. The outer wall of the inner can preferably is provided with a locking means such as a flange, to lock the seal onto such wall, and the seal, also coated with the above elastomeric adhesive, is preferably tapered downward and forms a leak-proof seal with the inner wall of the outer can, a collector mesh or wire from the catalyst electrode being exposed in contact with the inner wall of the outer cathode can.
REFERENCES:
patent: 3713896 (1973-01-01), Feldhake
patent: 3746580 (1973-07-01), Aker et al.
patent: 3791873 (1974-02-01), Angelovich
patent: 3852115 (1974-12-01), Lewis
patent: 3922178 (1975-11-01), Winger
Feeley H. A.
Geldin Max
Mack John H.
Unican Electrochemical Products Ltd.
LandOfFree
Production of zinc-air button cell does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Production of zinc-air button cell, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Production of zinc-air button cell will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1229058