Process and apparatus for making intercell connectors by an extr

Details Process and apparatus for making intercell connectors by an extr Process and apparatus for making intercell connectors by an extr

1973-11-23

1976-03-30

Garvin, Patrick P.

Batteries: thermoelectric and photoelectric

Thermoelectric

Radiation pyrometer

136176, H01M 226

Patent

active

039472906

ABSTRACT:
Improved extrusion-fusion-type intercell connectors and process involving: casting the plate strap lugs to be welded from a hypoeutectic lead-antimony alloy containing at least about 2 percent by weight antimony; initially extruding the lugs into contact through an aperture in a battery intercell partition, the contact area being between 15 and 75 percent of the area of the aperture; and gradually heating the lug extrusions through a softening stage, an antimony-rich-phase melting stage, and an antimony-lean-phase melting stage. Force applied by rapid-response, declining-force welding electrodes causes (1) the softened extrusions to reshape somewhat prior to melting, and (2) the antimony-rich-phase of the alloy to exude out of the welding zone filling voids in the aperture before any substantial melting of the antimony-lean-phase occurs. The resulting weld is dense (void-free), has an antimony-rich ring adjacent the aperture wall, and after rupturing, displays an indicator core useful for evaluating the welds made and monitoring the stability of the manufacturing process/equipment for making them.

REFERENCES:
patent: 3287165 (1966-11-01), Jensen
patent: 3313658 (1967-05-01), Sabatino et al.
patent: 3388005 (1968-06-01), Hahn et al.
patent: 3515597 (1970-06-01), Barnes et al.
patent: 3687734 (1972-08-01), Orlando et al.
patent: 3695939 (1972-10-01), Butthe et al.
patent: 3793086 (1974-02-01), Badge

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