The Gillette Company

Duracell Inc.

Duracell U.S. Operations, Inc.

Bhupendra Kanchanial Patel

Fred Joseph Berkowitz

Steven Jeffrey Specht

Michael Pozin

Yelena Kouznetsova

Viet H Vu

Haitao Chang

Yang Zhao

Douglas J Woodnorth

Maya Stevanovic

William T McHugh

Alexander Boris Shelekhin

Lucien Paul Fontaine

Jane A Blasi

Jeffrey S Hewes

Weifang Luo

Robert J Pinault

John D Sillesky

Alex Kaplan

Reynald Cantave

Gary T Viveiros

Michael McDermott

Paul Cheeseman

Jeffrey Poirier

Gary M Searle

Peter R Moses

Alwyn H Taylor

G Stephen Kelsey

Terrence F Reise

Gerald H Newman

Paul L Bedder

Douglas C Magnuson

John S Miller

Alfred M Kasianowicz

Yelena Valentenovna Kouznetsova

A battery includes a housing, and within the housing, an anode having an alkali metal as the active material, a cathode having a mass (m) of a cathode active material, for example, iron disulfide as the active material, a separator between the anode and the cathode, and an increased electrolyte volume (v).

Battery

A battery includes an anode having an alkali metal as the active material, a cathode having, for example, iron disulfide as the active material, and an increased electrolyte volume.

A primary electrochemical cell having an anode comprising lithium and a cathode comprising iron disulfide (FeS) and carbon particles. The cell is balanced so that the anode is in theoretical capacity excess (mAmp-hrs) compared to the theoretical capacity of the cathode. The anode and cathode can be spirally wound with separator therebetween and inserted into the cell casing with electrolyte then added. The electrolyte comprises a lithium salt dissolved in organic solvent.

Anode balanced lithium&#x2014;iron disulfide primary cell

Anode balanced lithium-iron disulfide primary cell

A cathode includes a foil current collector including a coating containing iron disulfide on one side that covers less than 100% of the side.

Battery electrodes

Method of making cathode including iron disulfide

A primary alkaline battery includes a housing, a cathode within the housing, an anode within the housing, and a separator electrically separating the anode and the cathode. The battery has a substantial (S/V) value.

Primary alkaline battery

A battery includes a housing, a first electrode, and a non-cylindrical second electrode within the first electrode.

A battery includes a cylindrical housing, a first electrode, a second electrode, and a separator. The second electrode includes a plurality of cavities within the first electrode.

Battery having an electrode within another electrode

A current interrupt mechanism for electrochemical cells is disclosed. A thermally activated current interrupt mechanism is integrated into an end cap assembly for an electrochemical cell. The thermally responsive mechanism preferably includes a free floating bimetallic disk or shape memory alloy member which deforms when exposed to elevated temperature causing a break in an electrical pathway within the end cap assembly. This prevents current from flowing through the cell and effectively shuts down an operating cell. The thermally responsive mechanism may include a heat producing electrical resistance means, preferably a Zener diode, to enhance thermal sensitivity. The end cap assembly may include a pressure responsive mechanism which ruptures when there is extreme gas pressure buildup. Gas is allowed to escape from the cell interior to the external environment through a series of vent apertures within the end cap assembly.

Current interrupter for electrochemical cells

A current interrupt assembly for electrochemical cells is disclosed. The current interrupter assembly may be a self-contained, sealed unit which may be separately inserted into the cell during cell construction. Several current interrupt assemblies may be inserted in the cell. The current interrupter assembly has particular utility for thin rechargeable cells and when inserted in the cell forms a portion of the electrical pathway between a cell electrode and corresponding terminal. The current interrupt mechanism comprises a thin thermally responsive member preferably comprising a disk of a shape memory metal alloy having a curved surface. The current interrupt mechanism may include a heat producing electrical resistance means, preferably a Zener diode in proximity to the thermally responsive member. When cell temperature exceeds a predetermined value the disk deflects to cause a break in the electrical pathway within the assembly. The assembly may include therein a flexible electrically conductive member which forms a part of the electrical pathway within the assembly and which is physically responsive to deflection of the thermally responsive member. The assembly may also include a pressure actuated diaphragm which may form a portion of the assembly housing. When the cell internal pressure exceeds a predetermined level the diaphragm deflects causing a break in the electrical pathway within the assembly, thereby shutting down the cell.

Growing community of inventors

Danbury, CT, United States of America

Bhupendra Kanchanial Patel