Union Carbide Corporation

Eveready Battery Company, Inc.

Theodore R Beatty

Harry Vourlis

Randolph J Glau

An electrode strip comprising a perforated conductive carrier, such as a nickel mat, coated with an electrochemically active material and wherein a selected area of the carrier free of the electrochemically active material is secured to a conductive tab on one side and a second conductive tab on the other side. The invention also relates to a method for producing the electrode strip.

Electrode strips for coiled assemblies and method of producing them

Galvanic cells having at least one safety vent mechanism comprised of a thermoformed film member retained across a vent aperture located in the cover of the cell demonstrate consistent venting pressures.

Thermoformed film member vent for galvanic cells

Radially sealed galvanic dry cells having a safety high pressure vent means comprising the crimping of an arc portion between about 150.degree. and 190.degree. of the top edge of the container over the cell closure means so that after a predetermined high internal gas pressure build up, the gas will tip the closure means and produce a vent passage between the cell's container and closure means proximal the remaining arc portion of the top edge of the container.

High pressure safety vent for galvanic dry cells

Radially sealed galvanic dry cells having a safety high pressure vent means comprising the crimping of an arc portion between about 150.degree. and 200.degree. of the top edge of the container over the cell's gasket-cover closure means so that at a predetermined high internal gas pressure build up, the gas will tip the cover of the closure means and produce a vent passage within the cell housing between the cover and the gasket of the closure means proximal the remaining arc portion of the top edge of the container.

The battery assembly incorporates a mechanical tab connection which has a multiplicity of projections for penetrating an electrode to form a mechanical joint and for simultaneously establishing electrical contact with the electrode through such joint.

Battery assembly

Polymer films, such as polypropylene and polyethylene, having improved surface adhesion characteristics and produced by subjecting conventional polymer films to a heat treatment followed by a corona treatment at an energy density-to-film surface of at least 9 watt-minutes/ft..sup.2.

Heat-treated, corona-treated polymer bodies and a process for producing

An alkaline cell is described wherein at least a pair of flat electrode elements of opposite polarity having a porous separator containing the alkaline electrolyte interposed therebetween are arranged in the form of a conventional electrode stack assembly, and wherein the electrode assembly is enclosed within a sealed, liquid-impervious plastic film envelope having a positive, negative and a third terminal connection in the walls thereof, each terminal connection comprising flat internal and external current collectors disposed adjacent to the inner and outer sides respectively of the walls overlying openings therein, the collectors being tightly adhered to the respective sides of the walls by thin layers of an adhesive sealant which is non-wettable by the alkaline electrolyte. Means are provided for making electrical connection between the current collectors through the openings in the walls of the envelope.

Alkaline cell with double collector positive, negative and third

A flat alkaline cell is described wherein an electrode assembly including at least a pair of flat electrode elements of opposite polarity having a porous separator containing an alkaline electrolyte interposed therebetween and a current collector disposed adjacent to and in electrical connection with one of the pair of electrode elements at one end of the electrode assembly, are enclosed within a sealed, liquid impervious plastic film envelope having an opening in one wall thereof which exposes at least a portion of the current collector for making external electrical connection therewith, and wherein a layer of an adhesive sealant which is non-wettable by the alkaline electrolyte, tightly adheres and seals together the current collector and the wall of the envelope at least around the periphery of the opening. The exposed portion of the current collector constitutes a first terminal connection to which a wire lead or the like may be attached. A second and third terminal connection are provided in the sealed envelope, the former being in electrical connection with the other of the pair of electrode elements of opposite polarity and the latter being in electrical connection with an auxiliary electrode.

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Bay Village, OH, United States of America

Theodore R Beatty