The Gillette Company

Duracell U.S. Operations, Inc.

Duracell Inc.

Electrochem Solutions Inc.

Alexander Kaplan

Viet H Vu

Kirakodu S Nanjundaswamy

Leslie J Pinnell

David C Batson

Michael Pozin

Nikolai Nikolaevich Issaev

George M Cintra

Fan Zhang

Frank Kressmann

Leo Faranda

David Leigh DeMuth

Joern Riemer

Thomas Kelly

Junan Kao

Gary M Searle

William T McHugh

Douglas J Woodnorth

Arden Phillip Johnson

Sean A Sargeant

Frank Kressman

Frank Peter Kressmann

Harmut Loth-Krausser

Matthew R Stone

Richard K Holman

Kirakodu Seetharamabhatta Nanjundaswamy

A secondary electrochemical cell comprises an anode, a cathode including electrochemically active cathode material, a separator between the anode and the cathode, and an electrolyte. The electrolyte comprises at least one salt dissolved in at least one organic solvent. The separator in combination with the electrolyte has an area-specific resistance of less than about 2 ohm-cm.

Secondary electrochemical cells with separator and electrolyte combination

The present invention relates to an electrochemical cell comprising an anode of a Group IA metal and a cathode of a composite material prepared from a first active cathode material of a transition metal phosphate mixed or added to a second active cathode material of a carbonaceous material. The cathode material of the present invention provides increased rate pulse performance compared to carbon monofluoride cathode material. In addition, the cathode material of the present invention is chemically stable which makes it particularly useful for applications that require increased rate capability in extreme environmental conditions such as those found in oil and gas exploration.

Mixed cathode material with high energy density

Disclosed is a method for charging a rechargeable battery that includes at least one rechargeable electrochemical cell is disclosed. The method includes measuring at least one electrical characteristic of the battery, and determining a charging current to be applied to the battery based on the at least one measured electrical characteristic.

Adaptive charger device and method

Disclosed is a battery having an internally integrated voltage converter module. The battery includes at least one electrochemical cell having an internal bore, a voltage converter module electrically coupled to the at least one electrochemical cell and disposed within a portion of the internal bore, the voltage converter configured to convert a first voltage produced by the at least one electrochemical cell into a second, different voltage, a set of terminals being electrically coupled to the voltage converter, and a bypass circuit coupled between one of the terminals of the set of terminals and the at least one electrochemical cell to direct charging current applied from an external source to the at least one electrochemical cell.

Battery with an integrated voltage converter having a bypass circuit

A battery that includes an electrochemical cell having an internal bore therethrough is described herein. The battery also includes a voltage converter module electrically coupled to the electrochemical cell and disposed within a portion of the internal bore The voltage converter is configured to convert a first voltage produced by the electrochemical cell into a second, different voltage.

Battery with integrated voltage converter

A cathode for an air recovery alkaline battery is disclosed. The cathode contains at least about 60% by weight MnOand at least about 2% by weight of a hydrophobic polymer; the MnOconsists essentially of electrochemically synthesized MnO.

Cathode for air assisted battery

A racetrack air recovery battery having a cathode, an anode, and a separator. The battery can include a can having a racetrack cross section; a cathode assembly disposed in the can; a bottom cup disposed on an end of the cathode assembly; and anode material disposed in the can. The battery can also include a seal assembly disposed in the can. The seal assembly can include a current collector having a shape that maximizes uniform discharge of the battery.

Air recovery battery

An air recovery battery is disclosed along with a method of assembling a battery including (a) inserting a cathode assembly in a can having a wall, the wall having at least one air access opening; (b) placing anode material in the can; (c) inserting a seal assembly into the can, the seal assembly having a current collector; and (d) sealing the can.

A prismatic air recovery battery is provided. The battery includes a central longitudinal axis and a cathode having a major surface normal to the central longitudinal axis. The battery can further include a cathode can having at least one air access opening having a central longitudinal axis, wherein the cathode includes a major surface normal to the longitudinal axis of the opening.

A battery includes a housing, a first electrode, a second electrode having a plurality of cavities within the first electrode, a separator between each cavity and the first electrode, a seal positioned above the first electrode and the cavity, and a current collector. The current collector includes a member passing through the seal, a prong extending into each cavity, and a branch member connecting each prong to the member beneath the seal.

Battery

An electrochemical cell is disclosed, having a sealed prismatic housing with two opposing, internal side surfaces defining therebetween an internal cavity having width and length. One of the side surfaces defines a convex arc, and the other of the side surfaces has a center portion opposing the convex arc of the one side surface, and features extending toward the one side surface and straddling the convex arc. An electrode stack is contained within the internal cavity of the housing, having positive and negative electrode sheets arranged in face-to-face relation. The electrode stack is arranged between the side surfaces of the housing such that the stack is retained between the one side surface and the extending features of the other side surface, and deflected to follow the convex arc to maintain contact pressure between the positive and negative electrode sheets. The stack is thus stretched across an inwardly crowned surface of the housing. The invention can, by maintaining good intersheet contact pressure within the stack, provide good overall active material utilization (for high cell capacity) and can help to inhibit housing distension of cells with broad sides. Methods of construction are also disclosed.

Growing community of inventors

Providence, RI, United States of America

Alexander Kaplan