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Energy storage connection system

United States Patent

8,212,412
July 3, 2012
View the Complete Patent at the US Patent & Trademark Office
A power system for connecting a variable voltage power source, such as a power controller, with a plurality of energy storage devices, at least two of which have a different initial voltage than the output voltage of the variable voltage power source. The power system includes a controller that increases the output voltage of the variable voltage power source. When such output voltage is substantially equal to the initial voltage of a first one of the energy storage devices, the controller sends a signal that causes a switch to connect the variable voltage power source with the first one of the energy storage devices. The controller then causes the output voltage of the variable voltage power source to continue increasing. When the output voltage is substantially equal to the initial voltage of a second one of the energy storage devices, the controller sends a signal that causes a switch to connect the variable voltage power source with the second one of the energy storage devices.
Benedict; Eric L. (Middlesex, VT), Borland; Nicholas P. (Montpelier, VT), Dale; Magdelena (Montpelier, VT), Freeman; Belvin (Asheville, NC), Kite; Kim A. (Burlington, VT), Petter; Jeffrey K. (Williston, VT), Taylor; Brendan F. (South Burlington, VT)
Northern Power Systems Utility Scale, Inc. (Barre, VT)
12/ 325,814
December 1, 2008
GRANT INFORMATION This invention was made with State of California support under California Energy Commission Agreement number 500-04-011. The Energy Commission has certain rights to this invention.