Pinnacle Research Institute, Inc.

Pacific Shinfu Technologies Co., Ltd.

Alan B McEwen

Robert R Tong

James M Poplett

Ronald L Anderson

James P Nelson

Mark L Goodwin

Gary E Mason

K C Tsai

Nazir Ahmad

Douglas Cromack

Davy Wu

A dry preunit ( ), includes a plurality of cells ( ) in a true bipolar configuration, which are stacked and bonded together, to impart to the device an integral and unitary construction. Each cell ( ) includes two electrically conductive electrodes ( A, B) that are spaced apart by a predetermined distance. The cell ( ) also includes two identical dielectric gaskets ( ) that are interposed, in registration with each other, between the electrodes ( A, B), for separating and electrically insulating these electrodes. When the electrodes ( A, B), and the gaskets ( ) are bonded together, at least one fill gap ( ) is formed for each cell. Each cell ( ) also includes a porous and conductive coating layer ( ) that is formed on one surface of each electrode. The coating layer ( ) includes a set of closely spaced-apart peripheral microprotrusions ( ), and a set of distally spaced-apart central microprotrusions ( ). These microprotrusions ( ) impart structural support to the cells, and provide additional insulation between the electrodes. An energy storage device ( A) such as a capacitor, is created with the addition of an electrolyte to the gap ( ) of the dry preunit ( ) and subsequent sealing of the fill ports.

Method of making energy storage device having electrodes coated with insulating microprotrusions

The present invention relates to an improved method to produce an electrical storage device having useful characteristics such as higher charge density, small volume, long-term reliable charge/discharge cycles, low leakage current, and the like. The dry preunit has useful properties in that it can be stored for long periods prior to contact with a non-aqueous or aqueous electrolyte. When the electrode surfaces are contacted with a non-aqueous or aqueous electrolyte, the novel capacitors produced are useful as a portable power supply in applications such as in defibrillator, electrical vehicles, radiotelephones etc.

Method to fabricate a reliable electrical storage device and the device

A dry preunit (10), includes a plurality of cells (110, 112, 114) in a true bipolar configuration, which are stacked and bonded together, to impart to the device an integral and unitary construction. Each cell (114) includes two electrically conductive electrodes (111A, 111B) that are spaced apart by a predetermined distance. The cell (114) also includes two identical dielectric gaskets (121, 123) that are interposed, in registration with each other, between the electrodes (111A, 111B), for separating and electrically insulating these electrodes. When the electrodes (111A, 111B), and the gaskets (121, 123) are bonded together, at least one fill gap (130) is formed for each cell. Each cell (114) also includes a porous and conductive coating layer (119, 120) that is formed on one surface of each electrode. The coating layer (119) includes a set of closely spaced-apart peripheral microprotrusions (125), and a set of distally spaced-apart central microprotrusions (127). These microprotrusions (125, 127) impart structural support to the cells, and provide additional insulation between the electrodes. An energy storage device (10A) such as a capacitor, is created with the addition of an electrolyte to the gap (130) of the dry preunit (10) and subsequent sealing of the fill ports.

Energy storage device

Growing community of inventors

Palo Alto, CA, United States of America

Alan B McEwen