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COMBINATION ENERGY STORAGE SYSTEM FOR SOLAR, WIND AND OTHER "NON-DISPATCHABLE" ENERGY SOURCES SERVING VARIABLE LOADS IN VARIOUS CONDITIONS

  • US 20130099721A1
  • Filed: 09/12/2012
  • Published: 04/25/2013
  • Est. Priority Date: 10/21/2011
  • Status: Abandoned Application
First Claim
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1. ) A compound energy storage sub-system having two types of energy storage devices (e.g. batteries) used in conjunction with a solar, wind, or other non-dispatchable energy source or combination thereof along with a control circuit to manage charging of the energy storage devices and serve a variable electric load. Wherein one energy storage device is capable of deep discharges from 60% to 100% for two to five thousand cycles within 70% of rated energy capacity and a second energy storage device, such as a deep cycle lead acid battery can only deliver on the order of five hundred to one thousand cycles within 70% of rated capacity at the same discharge levels, or similar cycle-life as the first storage device, but with discharges of only 10% to 30%. The control circuit shall employ pulse-width modulation (PWM) techniques in controlling the charge to the energy storage devices.

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