Gerald R Larocque

US Patent:

7193392, Mar 20, 2007

Filed:

Nov 19, 2003

Appl. No.:

10/717309

Inventors:

Darrell J. King - Belmont MA, US
Per Onnerud - Framingham MA, US
Jay J. Shi - Acton MA, US
Allan Chertok - Bedford MA, US
J. Thomas Fowler - Marblehead MA, US
Gerald R. Larocque - Bedford MA, US

Assignee:

Tiax LLC - Cambridge MA

International Classification:

H01M 10/44
H01M 10/46

US Classification:

320118

Abstract:

A system and method for determining and balancing state of charge among plural series connected electrical energy storage units is provided. State of change of a selected storage unit in a string of storage units is determined by (i) applying a non-dissipative load to the selected storage unit, resulting in an energy transfer between the selected storage unit and the string of electrical energy storage units through the non-dissipative load and (ii) determining the state of charge of the selected unit from voltage and current data of the selected storage unit resulting from the energy transfer. When the state of charge of the selected unit is different than a target state of charge, energy can be transferred between the selected unit and the string of storage units, such that the state of charge of the selected unit converges toward the target state of charge.

US Patent:

7245108, Jul 17, 2007

Filed:

Nov 19, 2003

Appl. No.:

10/717208

Inventors:

Allan Chertok - Bedford MA, US
J. Thomas Fowler - Marblehead MA, US
Darrell J. King - Belmont MA, US
Gerald R. Larocque - Bedford MA, US
Per Onnerud - Framingham MA, US
Jay J. Shi - Acton MA, US

Assignee:

TIAX LLC - Cambridge MA

International Classification:

H01M 10/46

US Classification:

320132

Abstract:

A system and method of balancing state of charge among plural series connected electrical energy storage unit is provided. Individual storage units are selectively coupled by semiconductor switches for monitoring and balancing state of charge. When the state of charge of a selected unit is greater than a target state of charge, energy is transferred from the selected unit to the string of storage units, such that the state of charge of the selected unit converges toward the target state of charge. Conversely, when the state of charge of a selected unit is less than a target state of charge, energy is transferred from the string of storage units to the selected unit, such that the state of charge of the selected unit converges toward the target state of charge.

US Patent:

7378818, May 27, 2008

Filed:

Nov 19, 2003

Appl. No.:

10/717207

Inventors:

J. Thomas Fowler - Marblehead MA, US
Allan Chertok - Bedford MA, US
Darrell J. King - Belmont MA, US
Gerald R. Larocque - Bedford MA, US
Per Onnerud - Framingham MA, US
Jay J. Shi - Acton MA, US

Assignee:

Tiax LLC - Cambridge MA

International Classification:

H02J 7/00

US Classification:

320119, 320108, 320121

Abstract:

A system is provided for balancing state of charge among plural series connected electrical energy storage units that includes a power converter that selectively couples to an individual storage unit of the a string of electrical energy storage units and bidirectionally transfers energy between the individual storage unit and the string of storage units.

US Patent:

20080191663, Aug 14, 2008

Filed:

Apr 18, 2008

Appl. No.:

12/105846

Inventors:

J. Thomas Fowler - Marblehead MA, US
Allan Chertok - Bedford MA, US
Darrell J. King - Belmont MA, US
Gerald R. Larocque - Bedford MA, US
Per Onnerud - Framingham MA, US
Jay J. Shi - Acton MA, US

Assignee:

TIAX LLC - Cambridge MA

International Classification:

H02J 7/00

US Classification:

320118

Abstract:

A system is provided for balancing state of charge among plural series connected electrical energy storage units that includes a power converter that selectively couples to an individual storage unit of the a string of electrical energy storage units and transfers energy by bidirectionally between the individual storage unit and the string of storage units.

US Patent:

57453772, Apr 28, 1998

Filed:

Mar 20, 1995

Appl. No.:

8/406508

Inventors:

Wendy Power - Westford MA
Michael A. Reed - Chelmsford MA
Dominick J. Frustaci - Williamsville NY
Gerald Larocque - Bedford MA
Brenda Marchetti - Plainville MA

Assignee:

Figgie International Inc. - Willoughby OH

International Classification:

G01F 2326

US Classification:

364509

Abstract:

A sensor apparatus is described that detects and indicates the volume of cryogenic liquid in a Dewar container independent of the spatial orientation and physical motions acting on the Dewar container. The sensor apparatus comprises a first conductor, preferably positioned adjacent to the container inner shell wall and a second conductor comprising a plurality of axially spaced and concentric endless conductor bands mounted inside the container in a proximately spaced and a parallel relationship with respect to the first conductor. The second conductor bands divide the first conductor into zones that provide a plurality of distinct and separate capacitors. A computer measures the capacitance of each capacitor and compares the individual capacitance measurements to reference capacitance values corresponding to a known volume of cryogenic fluid filled in the container at known angles of inclination.