Christopher James Matthews

US Patent:

20120025786, Feb 2, 2012

Filed:

Oct 27, 2009

Appl. No.:

13/259423

Inventors:

Stephen D. Heizer - Houston TX, US
Christopher K. Matthews - Spring TX, US
John A. Wozniak - Houston TX, US

International Classification:

H02J 7/00

US Classification:

320160

Abstract:

Methods and apparatus for recharging a rechargeable battery () having step charge requirements, where the charge current is tapered as successive voltage thresholds of the step charge requirements are approached. The battery () is programmed with a charge tapering algorithm, so that the battery charger () need not be programmed with battery-specific information. The charge tapering algorithm is used in conjunction with the step charge requirements and a measurement of one or more properties of the battery to determine an appropriate charge current as a function of time.

US Patent:

20170271905, Sep 21, 2017

Filed:

Jun 6, 2017

Appl. No.:

15/615584

Inventors:

- Houston TX, US
Jon G. Lloyd - Houston TX, US
John Wozniak - Houston TX, US
Christopher K. Matthews - Houston TX, US

International Classification:

H02J 7/00
H01M 10/44
H01M 10/46
H01M 10/48
H02J 7/04

Abstract:

An energy storage device includes an integrated fuel gauge that is operatively connected to the energy storage device. The fuel gauge evaluates an operating parameter of the energy storage device and dynamically determines a state of charge. The fuel gauge communicates a communication including a requested operating parameter to the charging component with the single communication line and the signal indicates to an operating system component a change of an energy storage device state. The signal is used to trigger an alert or interrupt that causes the operating system component to display the change of the energy storage state based on the signal.

US Patent:

20150084602, Mar 26, 2015

Filed:

Apr 30, 2012

Appl. No.:

14/397532

Inventors:

Thomas P. Sawyers - Hempstead TX, US
Jon G. Lloyd - Cypress TX, US
John A. Wozniak - Houston TX, US
Christopher K. Matthews - Spring TX, US

International Classification:

H02J 7/00

US Classification:

320134

Abstract:

An energy storage device includes an integrated fuel gauge that is operatively connected to the energy storage device. The fuel gauge evaluates an operating parameter of the energy storage device and dynamically determines a state of charge. The fuel gauge communicates a communication including a requested operating parameter to the charging component with the single communication line and the signal indicates to an operating system component a change of an energy storage device state. The signal is used to trigger an alert or interrupt that causes the operating system component to display the change of the enemy storage state based on the signal.

US Patent:

20150002082, Jan 1, 2015

Filed:

Apr 30, 2012

Appl. No.:

14/372097

Inventors:

Thomas P. Sawyers - Hampstead TX, US
John A. Wozniak - Houston TX, US
Christopher K. Matthews - Houston TX, US
Jon G. Lioyd - Cypress TX, US

Assignee:

HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. - Houston TX

International Classification:

H02J 7/00

US Classification:

320107, 320162

Abstract:

An energy storage device includes an integrated fuel gauge that is operatively connected to the energy storage device. The fuel gauge evaluates an operating parameter of the energy storage device and dynamically determines a state of charge. A charging component is coupled to the energy storage device with a single communication line. The fuel gauge communicates a communication including a requested operating parameter to the charging component with the single communication line according to a predetermined charge profile based on the state of charge determined.