Ganesh Grover Venugopal

US Patent:

6797427, Sep 28, 2004

Filed:

Aug 9, 2001

Appl. No.:

09/925199

Inventors:

Hossein Maleki - Lawrenceville GA
Anaba Anani - Lawrenceville GA
Ganesh Venugopal - Duluth GA

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H01M 1050

US Classification:

429120, 429149, 429153, 429159, 429163, 624577

Abstract:

A battery for use in various temperature environments includes a plurality of cells arranged in a close packing arrangement and a sleeve that is disposed around the cells. The sleeve is constructed from a material that acts as an insulator at relatively low temperatures and that acts as a conductor at relatively high temperatures.

US Patent:

58494332, Dec 15, 1998

Filed:

Mar 10, 1997

Appl. No.:

8/813398

Inventors:

Ganesh Venugopal - Duluth GA
Anaba A. Anani - Lawrenceville GA
John Moore - Stone Mountain GA
Simon Thomas - Lawrenceville GA

Assignee:

Motorola, Inc. - Schaumuburg IL

International Classification:

H01M 1040

US Classification:

429190

Abstract:

An electrochemical cell (10) includes first and second electrodes (12) and (14) with an electrolyte system (26) disposed therebetween. The electrolyte system is fabricated of a blend of differing grades of a single polymer. One grade may be provided to, for example, absorb an electrolyte active species, while the second grade may be provided to enhance mechanical integrity of the system.

US Patent:

58341358, Nov 10, 1998

Filed:

Sep 27, 1997

Appl. No.:

8/937298

Inventors:

Shekhar L. Pendalwar - Lawrenceville GA
Jason N. Howard - Lawrenceville GA
Ganesh Venugopal - Duluth GA
Manuel Oliver - Norcross GA

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H01M 1040

US Classification:

429190

Abstract:

An electrochemical cell 10 includes first and second electrodes 12 and 14 with an electrolyte system 26 disposed therebetween. The electrolyte system includes at least a multilayered first polymeric region 28, having second layers 30 and 32, of a second polymer material. The second layers may absorb an electrolyte active species and to adhere the adjacent layer of electrode material to the electrolyte 26. The electrolyte system further includes a process for packaging and curing the electrolyte after it has been incorporated into a discrete battery device.

US Patent:

59087170, Jun 1, 1999

Filed:

Aug 28, 1997

Appl. No.:

8/919668

Inventors:

Shekhar L. Pendalwar - Lawrenceville GA
Manuel Oliver - Duluth GA
Ganesh Venugopal - Duluth GA

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H01M01040

US Classification:

429331

Abstract:

An electrochemical cell (10) includes first and second electrodes (12) and (14) with an electrolyte system (26) disposed therebetween. The electrolyte system includes a polymeric support structure through which is dispersed an electrolyte active species in an organic solvent. The solvent, which remains liquid to low temperatures, is a binary or higher order system comprising diethyl carbonate and one or more of propylene carbonate, ethylene carbonate, dimethyl carbonate, dipropylcarbonate, dimethylsulfoxide, acetonitrile, dimethoxyethane, tetrahydrofuran, n-methyl-2-pyrrolidone, and combinations thereof.

US Patent:

58539166, Dec 29, 1998

Filed:

Oct 28, 1996

Appl. No.:

8/739229

Inventors:

Ganesh Venugopal - Duluth GA
Anaba A. Anani - Lawrenceville GA

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H01M 1040

US Classification:

429190

Abstract:

An electrochemical cell 10 includes first and second electrodes 12 and 14 with an electrolyte system 26 disposed therebetween. The electrolyte system includes at least a first and second layer 28 and 30, the second or gelling layer 30 being used to absorb an electrolyte active species.

US Patent:

55589596, Sep 24, 1996

Filed:

Feb 21, 1996

Appl. No.:

8/603565

Inventors:

Ganesh Venugopal - Duluth GA
Veronica R. Reichert - Bethlehem GA
Jinshan Zhang - Duluth GA

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H01M 1040
H01M 614

US Classification:

429 192

Abstract:

An electrolyte system (40) for use in connection with an electrochemical cell (10). The cell (10) includes a positive (20) and a negative (30) electrode and the electrolyte system (40) disposed there between. The electrolyte system includes a liquid electrolyte adapted to provide ion transport between the positive and negative electrodes and a segmented block copolymeric support structure for engaging the liquid electrolyte.

US Patent:

56311036, May 20, 1997

Filed:

Sep 27, 1996

Appl. No.:

8/720062

Inventors:

Florence O. Eschbach - Duluth GA
Manuel Oliver - Duluth GA
Ganesh Venugopal - Duluth GA
Shekhar Pendalwar - Lawrenceville GA

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H01M 618

US Classification:

429190

Abstract:

An electrochemical cell (10) includes first and second electrodes (12) and (14) with an electrolyte system (26) disposed therebetween. The electrolyte system includes at least a filler material and a gelling polymer. The filler material comprises at least about 50 vol. % of the total amount of polymer in the electrolyte system, and has a porosity on the order of about 20-80%.

US Patent:

61652334, Dec 26, 2000

Filed:

May 5, 1998

Appl. No.:

9/072795

Inventors:

Ganesh Venugopal - Duluth GA
Edmond Louie - Lawrenceville GA

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H01M 1038

US Classification:

296231

Abstract:

A method of fabricating a wound cell that retains its shape includes the steps of employing a heat-shrinkable porous membrane as the cell separator, and heating the cell wind either before or after addition of electrolyte.