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Energy storage system

  • US 9,293,917 B2
  • Filed: 06/21/2011
  • Issued: 03/22/2016
  • Est. Priority Date: 06/21/2010
  • Status: Active Grant
First Claim
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1. An energy storage system comprising:

  • a plurality of storage mediums having substantially different energy and power density each connected to a DC bus via a respective bidirectional isolated DC-DC converter; and

    a controller configured to independently determine a current demand for each storage medium based on a control mode;

    wherein a plurality of bidirectional isolated DC-DC converters connected to one or more first storage medium are connected in a modified input parallel output series configuration, a plurality of bidirectional isolated DC-DC converters connected to one or more second storage medium are connected in an input parallel output series configuration and the two pluralities of bidirectional isolated DC-DC converters are intermediately bridged.

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