Robert J Crawford

US Patent:

6449139, Sep 10, 2002

Filed:

Aug 18, 1999

Appl. No.:

09/377328

Inventors:

C. Joseph Farahmandi - San Diego CA
John M. Dispennette - Oceanside CA
Edward Blank - San Diego CA
Robert W. Crawford - Menifee CA
Chenniah Nanjundiah - San Diego CA

Assignee:

Maxwell Electronic Components Group, Inc. - San Diego CA

International Classification:

H01G 900

US Classification:

361502, 361503, 361518, 29 2503

Abstract:

A long life double layer capacitor and method of making the same including a case and a first terminal with an electrically insulating hermitic seal interposed between the first terminal and the case. A first current collector foil is electrically coupled to an interior portion of the first terminal and a first metal impregnated carbon cloth electrode having a metal impregnated side which is juxtaposed against the first current collector foil. A porous separator is then juxtaposed against the first metal impregnated carbon cloth electrode and separating the first metal impregnated carbon cloth electrode from a second metal impregnated carbon cloth electrode having a metal impregnated side which faces away from the porous separator. A second current collector foil is juxtaposed against the metal impregnated side of the second metal impregnated carbon cloth electrode and is electrically coupled to the second terminal. And an electrolyte solution saturates the first and second metal impregnated carbon cloth electrodes and is substantially contained by the case and the electrically insulating hermitic seal such that an influx of impurities into the electrolyte solution is substantially inhibited by the case and the electrically insulating hermetic seal.

US Patent:

6585152, Jul 1, 2003

Filed:

Feb 13, 2001

Appl. No.:

09/783728

Inventors:

C. Joseph Farahmandi - San Diego CA
John M. Dispennette - Oceanside CA
Edward Blank - San Diego CA
Robert W. Crawford - Menifee CA

Assignee:

Maxwell Technologies, Inc. - San Diego CA

International Classification:

H01G 900

US Classification:

228262, 2282625, 29 2503, 29843, 148527, 148558, 148688, 156 60, 156163

Abstract:

A method of making a double layer capacitor consists of the steps of: impregnating each of a plurality of carbon preforms with a metal; forming a plurality of current collector foils, each of the plurality of current collector foils having a tab portion and a paddle portion; forming a plurality of electrodes by positioning one of the plurality of carbon preforms against respective paddle portions of each of the plurality of current collector foils, wherein each of the plurality of electrodes comprises one of the plurality of current collector foils and one of the plurality of carbon preforms; stacking each of the plurality of electrodes such that tab portions of adjacent ones of the plurality of current collector foils are offset, thereby forming an electrode stack; interposing respective porous separator portions between each of the plurality of electrodes, wherein the porous separator portions function as electrical insulators between the adjacent ones of the plurality of electrodes preventing electrical shorting against each other; applying a modest constant pressure against the electrode stack; saturating the electrode stack with an electrolytic solution; and maintaining the electrode stack immersed within the electrolytic solution.

US Patent:

6842330, Jan 11, 2005

Filed:

Sep 6, 2002

Appl. No.:

10/236793

Inventors:

C. Joseph Farahmandi - San Diego CA, US
John M. Dispennette - Oceanside CA, US
Edward Blank - San Diego CA, US
Robert W. Crawford - Menifee CA, US
Chenniah Nanjundiah - San Diego CA, US

Assignee:

Maxwell Technologies, Inc. - San Diego CA

International Classification:

H01G 900
H01G 202
H01G 906

US Classification:

361502, 361503, 361518

Abstract:

A long life double layer capacitor and method of making the same including a case and a first terminal with an electrically insulating hermitic seal interposed between the first terminal and the case. A first current collector foil is electrically coupled to an interior portion of the first terminal and a first electrode comprising carbon which is juxtaposed against the first current collector foil. A porous separator is then juxtaposed against the first electrode comprising carbon and separating the first electrode from a second electrode comprising carbon. A second current collector foil is juxtaposed against a side of the second electrode and is electrically coupled to the second terminal. And an electrolyte solution saturates the first and second electrodes comprising carbon and is substantially contained by the case and the electrically insulating hermitic seal such that an influx of impurities into the electrolyte solution is substantially inhibited by the case and the electrically insulating hermetic seal.

US Patent:

7090706, Aug 15, 2006

Filed:

Mar 31, 2004

Appl. No.:

10/815260

Inventors:

C. Joseph Farahmandi - San Diego CA, US
John M. Dispennette - Oceanside CA, US
Edward Blank - San Diego CA, US
Robert W. Crawford - Menifee CA, US
Chenniah Nanjundiah - San Diego CA, US

Assignee:

Maxwell Technologies, Inc. - San Diego CA

International Classification:

H01G 9/00
B05D 5/12

US Classification:

29 2503, 427 80

Abstract:

A long life double layer capacitor and method of making the same including a case and a first terminal with an electrically insulating hermitic seal interposed between the first terminal and the case. A first current collector foil is electrically coupled to an interior portion of the first terminal and a first electrode comprising carbon which is juxtaposed against the first current collector foil. A porous separator is then juxtaposed against the first electrode comprising carbon and separating the first electrode from a second electrode comprising carbon. A second current collector foil is juxtaposed against a side of the second electrode and is electrically coupled to the second terminal. And an electrolyte solution saturates the first and second electrodes comprising carbon and is substantially contained by the case and the electrically insulating hermitic seal such that an influx of impurities into the electrolyte solution is substantially inhibited by the case and the electrically insulating hermetic seal.

US Patent:

7116545, Oct 3, 2006

Filed:

Mar 9, 2005

Appl. No.:

11/076238

Inventors:

C. Joseph Farahmandi - San Diego CA, US
John M. Dispennette - Oceanside CA, US
Edward Blank - San Diego CA, US
Robert W. Crawford - Menifee CA, US
Chenniah Nanjundiah - San Diego CA, US

Assignee:

Maxwell Technologies, Inc. - San Diego CA

International Classification:

H01G 9/00

US Classification:

361502, 361504, 361508, 361512, 361523, 361528, 29 2503

Abstract:

A long life double layer capacitor and method of making the same including a case and a first terminal with an electrically insulating hermitic seal interposed between the first terminal and the case. A first current collector foil is electrically coupled to an interior portion of the first terminal and a first electrode comprising carbon which is juxtaposed against the first current collector foil. A porous separator is then juxtaposed against the first electrode comprising carbon and separating the first electrode from a second electrode comprising carbon. A second current collector foil is juxtaposed against a side of the second electrode and is electrically coupled to the second terminal. And an electrolyte solution saturates the first and second electrodes comprising carbon and is substantially contained by the case and the electrically insulating hermitic seal such that an influx of impurities into the electrolyte solution is substantially inhibited by the case and the electrically insulating hermetic seal.

US Patent:

7407520, Aug 5, 2008

Filed:

Aug 10, 2006

Appl. No.:

11/503322

Inventors:

C. Joseph Farahmandi - San Diego CA, US
John M. Dispennette - Oceanside CA, US
Edward Blank - San Diego CA, US
Robert W. Crawford - Menifee CA, US
Chenniah Nanjundiah - San Diego CA, US

Assignee:

Maxwell Technologies, Inc. - San Diego CA

International Classification:

H01G 9/00

US Classification:

29 2503, 438210, 438238, 438239, 361309, 361328, 361502, 257E21008, 257E21011

Abstract:

A long life double layer capacitor and method of making the same including a case and a first terminal with an electrically insulating hermitic seal interposed between the first terminal and the case. A first current collector foil is electrically coupled to an interior portion of the first terminal and a first electrode comprising carbon which is juxtaposed against the first current collector foil. A porous separator is then juxtaposed against the first electrode comprising carbon and separating the first electrode from a second electrode comprising carbon. A second current collector foil is juxtaposed against a side of the second electrode and is electrically coupled to the second terminal. And an electrolyte solution saturates the first and second electrodes comprising carbon and is substantially contained by the case and the electrically insulating hermitic seal such that an influx of impurities into the electrolyte solution is substantially inhibited by the case and the electrically insulating hermetic seal.

US Patent:

7492574, Feb 17, 2009

Filed:

Dec 8, 2005

Appl. No.:

11/298082

Inventors:

Alex Fresard - Encinitas CA, US
Robert Crawford - Murrieta CA, US

Assignee:

Maxwell Technologies, Inc. - San Diego CA

International Classification:

H01G 2/10
H01G 9/08

US Classification:

361517, 361502, 361535, 29 2503

Abstract:

Porous separator is sandwiched between electrode films with attached current collector foil to obtain an electrode sheet. The electrode sheet is formed into a jellyroll for use in a double layer capacitor. The jellyroll is inserted into a can through an open end to rest against the can's bottom. A collector plate is pressed against the jellyroll, crunching current collector foil protruding from each end of the jellyroll. The bottom and the collector plate include indentations of reduced thickness. Laser is applied to the indentations to weld the foil on each end of the jellyroll to the bottom or collector plate. The laser application pattern, for example, a zigzag pattern, results in the total length of laser welds along each indentation being considerably longer than the length of the indentation, reducing contact resistance between (1) the foil and the bottom, and (2) the foil and the current collector.

US Patent:

8098481, Jan 17, 2012

Filed:

May 9, 2006

Appl. No.:

12/300102

Inventors:

Linda Zong - San Diego CA, US
Xiaomei Xi - Carlsbad CA, US
Porter Mitchell - San Diego CA, US
James Borkenhagen - Spring Valley CA, US
Robert Crawford - Murrieta CA, US
Michael Everett - Fallbrook CA, US
Alexandre Fresard - Encinitas CA, US

Assignee:

Maxwell Technologies, Inc. - San Diego CA

International Classification:

H01G 9/00

US Classification:

361502

Abstract:

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.

Address:

9624 Babauta Rd, San Diego, CA 92129

Phone:

8585665762

VIN:

2C3CA5CG3BH547573

Make:

CHRYSLER

Model:

300

Year:

2011