Assembly of air-depolarized cells

Details Assembly of air-depolarized cells Assembly of air-depolarized cells

H - Electricity

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319/100

H01M 6/02 (2006.01) H01M 2/02 (2006.01) H01M 4/00 (2006.01) H01M 12/06 (2006.01)

Patent

CA 1185318

ASSEMBLY OF AIR-DEPOLARIZED BUTTON CELLS ABSTRACT An air-depolarized button cell, such as a zinc-air cell, is assembled by placing a layer of hydrophobic microporous material, preferably polytetrafluoroethylene (PTFE) with catalytic cathode thereon in a cathode can having an air hole on the bottom thereof. A ring is placed above the cathode electrode, is force fitted within the cathode can, and is pushed downwardly against the cathode electrode structure sufficiently as to cause some compression of the PTFE layer beneath the cathode electrode in the area beneath the ring. By providing this compressed portion of the PTFE layer, the cathode can is rendered substantially leak-proof, before assembly of the cell.

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