The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 17, 2007
Filed:
Nov. 19, 2003
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);
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);
TIAX LLC, Cambridge, MA (US);
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.