Eveready Battery Company, Inc.

Energizer Brands, LLC

Mark A Schubert

John C Bailey

Guanghong Zheng

Jing Zhang

Abdelkader Hilmi

Matthew T Wendling

Gary R Tucholski

Richard A Langan

Jack W Marple

Weiwei Huang

Andrew Webber

Frank H Feddrix

Frank B Tudron

Robert E Ray

James Xixian Wu

Mark D Vandayburg

Alan D Ayers

Nghia Cong Tang

Neal Charles White

Paula J Hughes

Katherine E Ayers

Jerald D Baldwin, Jr

Iii Michael J Brandon

A lithium-iron disulfide battery with improved high temperature performance is disclosed. The separator characteristics are deliberately selected to be compatible with the electrolyte at the intended temperature. Additional or alternative modifications can be made in the form of a scaffold or laminated structure. A preferred polymer for such separators is polyimide.

Lithium iron disulfide battery

An end assembly seals a cylindrical electrochemical cell. The assembly includes a positive temperature coefficient (PTC) device and a gasket having a protrusion that cooperates with the end assembly isolates the PTC device from primary axial compression forces present in the closure assembly. In further embodiments of the present invention, the end assembly may be produced by insert molding a seal element about the terminal cover and the gasket itself has an E or F shaped cross section.

Closure assembly for electrochemical cells

An engineered thermoplastic sealing member for LiFeSand other nonaqueous cells is disclosed. The optimal material displays a propensity to absorb at least 10 weight percent of an ether-based electrolyte while, at the same time, displaying a vapor transmission rate of less than 500((g&#xd7;mil)/(100 in&#xd7;days).

Electrolyte-absoring, non-permeable sealing materials

A flat, flexible electrochemical cell is provided. The within invention describes various aspects of the flat, flexible electrochemical cell. A printed anode is provided that obviates the need for a discrete anode current collector, thereby reducing the size of the battery. An advantageous electrolyte is provided that enables the use of a metallic cathode current collector, thereby improving the performance of the battery. Printable gelled electrolytes and separators are provided, enabling the construction of both co-facial and co-planar batteries. Cell contacts are provided that reduce the potential for electrolyte creepage in the flat, flexible electrochemical cells of the within invention.

Flexible thin printed battery and device and method of manufacturing same

An electrochemical battery cell with an aperture in the container or cell cover has the aperture sealed by an improved thermoplastic sealing member, which forms at least a part of the cell's pressure relief vent and is made from a material comprising a thermoplastic resin and more than 10 weight percent of a thermal-stabilizing filler, to provide an effective seal and a reliable pressure relief vent over a broad temperature range.

Nonaqueous cell with improved thermoplastic sealing member

An electrochemical battery cell with an improved thermoplastic sealing member. The seal member is made from a thermoplastic resin comprising polyphthalamide or impact modified polyphenylene sulfide. The seal member provides an effective seal vent over a broad temperature range and has a low electrolyte vapor transmission rate.

An alkaline electrochemical cell containing a neat multiphase thermoplastic polymer separator is disclosed. The microstructure and composition of the polymer are selected to provide a film that can physically endure the rigors of a cell assembly process and also provide adequate ionic conductivity to support a high rate discharge. In one embodiment, the ionic conductivity of the separator is improved upon contact with the cell's alkaline electrolyte. Processes that can be used to manufacture a cell of this invention are also described.

Thermoplastic separator for alkaline electrochemical cells and processes for the production thereof

The invention is an injection-molded thermoplastic seal member for use in an electrochemical cell and a cell containing the seal member. The thermoplastic material comprises a mixture of a polyolefin matrix, comprising more than 30 weight percent of the thermoplastic material, and an aromatic polymer having a repeating unit that comprises at least one aromatic functional group. The material has excellent molding properties and results in a seal member that forms a superior compressive seal in the electrochemical cell.

Seal for electrochemical cell

A method of making electrochemical cells with high anode-to-cathode interfacial surface area and improved discharge efficiency at high rate discharge, without sacrificing total capacity involves the use of a separator coated electrode, and a flowable material comprising a second electrode. The first electrode and flowable material comprising the second electrode are disposed in a cell housing. The flowable material surrounds the coated surfaces of the first electrode. The invention also provides simplified methods for making electrochemical cells having a high anode-to-cathode interfacial surface area.

Electrochemical cell constructions and methods of making the same

One embodiment of the present invention is a method for synthesizing superabsorbent polyacrylate polymers comprising the steps of providing an acrylate monomer, a multifunctional monomer, and free radical initiator in the absence of a solvent; mixing the acrylate monomer, multifunctional monomer, and free radical initiator to create a solvent free solution; and subjecting the solvent free solution to radiation to create a cross-linked polymer. The product created by this method is also a part of the present invention.

Growing community of inventors

Brunswick, OH, United States of America

Mark A Schubert