Bipolar battery plate

Details Bipolar battery plate Bipolar battery plate

1985-07-15

1987-04-21

Hearn, Brian E.

Metal working

Method of mechanical manufacture

Electrical device making

264108, 264171, 429160, 429210, H07M 600

Patent

active

046584994

ABSTRACT:
A liquid-impermeable plate (10) having through-plate 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 led 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: 731447 (1903-06-01), Gale
patent: 2688581 (1954-09-01), Stubbs
patent: 3536794 (1970-10-01), Stevenson
patent: 4209481 (1980-06-01), Kashiro et al.
patent: 4410587 (1983-10-01), Fair et al.

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