Maxwell Technologies, Inc.

Tesla, Inc.

James Borkenhagen

Xiaomei Xi

Santhanam Raman

Xiang-Rong Ye

Guy C Thrap

Adrian Schneuwly

Mark Wardas

Philippe Lauper

Porter H Mitchell

Robert W Crawford

Alex Fresard

Linda Zong

Michael Everett

Alexandre Fresard

An energy storage device can include a cathode, an anode, and a separator between the cathode and the anode, where the anode and/or electrode includes an electrode film having a super-fibrillized binder material and carbon. The electrode film can have a reduced quantity of the binder material while maintaining desired mechanical and/or electrical properties. A process for fabricating the electrode film may include a fibrillization process using reduced speed and/or increased process pressure such that fibrillization of the binder material can be increased. The electrode film may include an electrical conductivity promoting additive to facilitate decreased equivalent series resistance performance. Increasing fibrillization of the binder material may facilitate formation of thinner electrode films, such as dry electrode films.

Compositions and methods for energy storage device electrodes

In one embodiment, an energy storage device having a first electrode supported by a first collectors sheet; a second electrode supported by a second collector sheet; and a dielectric separator therebetween, all spirally wound together. A container houses this spiral winding, with the first collector sheet having an end in contact with the base and the second collector sheet having an end oriented towards an opening opposite to the base. A collector plate is interposed between the second collector sheet and the opening and is restrained in position by a crimp in the container. A lid is positioned in the opening and has one side in electrical contact with the collector plate and an opposite side oriented outwardly of the container. The lid is restrained in position by rolling the one or more container walls over the lid.

Energy storage device

In one embodiment, an energy storage device comprises a container containing a first electrode generating a positive charge, a second electrode generating a negative charge, and an electrolyte in ionic contact with the electrodes. The container comprises a base and one or more walls defining an opening in the container, the base having a first terminal in electrical connection with the first electrode. A cap is shaped to close the opening and is electrically isolated from the container, while having a second terminal in electrical connection with the second electrode. A collector plate is interposed between the first electrode and the base and is electrically conductive, providing the electrical connection between the first electrode and the first electrical terminal and exhibiting an extension with a concave side oriented in the direction of the base, which is connected to the base by interference fitting against a mating protrusion on the base.

Energy storage device having a collector plate

A thermally fitted interconnect couples energy storage cells without the use of additional materials of fasteners. Variations of the interconnect can be used to facilitate fitting of multiple energy storage cell with multiple cell to cell spacings in a rapid and inexpensive manner.

Thermal interconnects for coupling energy storage devices

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Spring Valley, CA, United States of America

James Borkenhagen