Method and apparatus for storing and depleting energy
First Claim
1. A method comprising:
 determining a corresponding charge fraction for each of a plurality of energy storage devices, wherein the plurality of energy storage devices are connected onetoone to a plurality of power converters; and
for each of the plurality of energy storage devices, independently maintaining, by a corresponding power converter of the plurality of power converters, a corresponding voltage conversion ratio such that the plurality of energy storage devices are charged within a common charge time that is based on;
the corresponding charge fractions for all of the plurality of energy storage devices, andtransfer of power from an electrical network and to the plurality of energy storage devices.
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Accused Products
Abstract
A method to control storage into and depletion from multiple energy storage devices. The method enables an operative connection between the energy storage devices and respective power converters. The energy storage devices are connectable across respective first terminals of the power converters. At the second terminals of the power converter, a common reference is set which may be a current reference or a voltage reference. An energy storage fraction is determined respectively for the energy storage devices. A voltage conversion ratio is maintained individually based on the energy storage fraction. The energy storage devices are stored individually with multiple variable rates of energy storage through the first terminals. The energy storage is complete for the energy storage devices substantially at a common end time responsive to the common reference.
1244 Citations
20 Claims

1. A method comprising:

determining a corresponding charge fraction for each of a plurality of energy storage devices, wherein the plurality of energy storage devices are connected onetoone to a plurality of power converters; and for each of the plurality of energy storage devices, independently maintaining, by a corresponding power converter of the plurality of power converters, a corresponding voltage conversion ratio such that the plurality of energy storage devices are charged within a common charge time that is based on; the corresponding charge fractions for all of the plurality of energy storage devices, and transfer of power from an electrical network and to the plurality of energy storage devices.  View Dependent Claims (2, 3, 4, 5, 6, 7)


8. A method comprising:

determining a corresponding charge fraction for each of a plurality of energy storage devices, wherein the plurality of energy storage devices are connected onetoone to a plurality of power converters; and for each of the plurality of energy storage devices, independently maintaining, by a corresponding power converter of the plurality of power converters, a corresponding voltage conversion ratio such that the plurality of energy storage devices are discharged within a common discharge time that is based on; the corresponding charge fractions for all of the plurality of energy storage devices, and transfer of power from the plurality of energy storage devices and to an electrical network.  View Dependent Claims (9, 10, 11, 12, 13, 14)


15. A system comprising:

an energy storage device; fuel gauge circuitry configured to determine a charge fraction for the energy storage device; a power converter comprising first terminals connected to the energy storage device; an inverter comprising; second terminals connected to the power converter, and third terminals connected to an electrical network; and a central controller configured to adjust, based on the charge fraction for the energy storage device determined by the fuel gauge circuitry, a voltage conversion ratio for the energy storage device such that the energy storage device completes charging or discharging at a substantially common time as another energy storage device connected to the electrical network.  View Dependent Claims (16, 17, 18, 19, 20)

1 Specification