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ENERGY STORAGE SYSTEM

  • US 20110140649A1
  • Filed: 12/15/2010
  • Published: 06/16/2011
  • Est. Priority Date: 12/15/2009
  • Status: Active Grant
First Claim
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1. An energy storage system for charging/discharging power of a plurality of battery packs connected between a grid and a variable power source, the energy storage system comprising:

  • an inverter connected between the grid, the plurality of battery packs, and the variable power source, the inverter inverting an AC power into a DC power and inverting a DC power into an AC power according to charge/discharge;

    a plurality of converters connected between the battery pack, the variable power source, and the grid, the converters being connected to the battery packs in a one-to-one relationship to convert a charge/discharge power of the battery packs, respectively;

    a plurality of battery switching devices, the battery switching devices being respectively connected between the converters and the battery packs; and

    a controller connected to the inverter and the converter to control driving, the controller controlling a turn-on/off operation of the battery switching devices.

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