Bipolar battery plate

Details Bipolar battery plate Bipolar battery plate

1982-02-08

1985-09-17

Hearn, Brian E.

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

429160, 339 59M, H01M 648

Patent

active

045420823

ABSTRACT:
A liquid-impermeable plate (10) having throughplate conductivity with essentially zero resistance comprises an insulator sheet (12) having a series of spaced perforations (14) each of which contains a metal element (16) sealingly received into the perforation (14). A low-cost plate can readily be manufactured by punching a thermoplastic sheet (40) such as polypropylene with a punching tool (52), filling the apertures with lead spheres (63) having a diameter smaller than the holes (50) but larger than the thickness of the sheet, sweeping excess spheres (62) off the sheet with a doctor blade (60) and then pressing a heated platen (74) onto the sheet to swage the spheres into a cylindrical shape and melt the surrounding resin to form a liquid-impermeable collar (4) sealing the metal into the sheet.

REFERENCES:
patent: 627009 (1899-06-01), Paget
patent: 3553019 (1971-01-01), Bushrod et al.
patent: 3680037 (1972-07-01), Nellis et al.
patent: 3723181 (1973-03-01), Oakley
patent: 3817788 (1974-06-01), Eckerbom et al.
patent: 3862790 (1975-01-01), Davies et al.
patent: 3982320 (1976-09-01), Buchoff et al.
patent: 4008300 (1977-02-01), Ponn

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