US 11,811,231 B1
Systems and methods for state-of-charge dependent control of an energy storage system
Nadim Kanan, Elk Grove, CA (US); and Finbar Sheehy, San Diego, CA (US)
Filed by 8ME NOVA, LLC, El Dorado Hills, CA (US)
Filed on Jul. 18, 2023, as Appl. No. 18/223,446.
Int. Cl. H02J 3/28 (2006.01); H02J 3/00 (2006.01); H02J 7/00 (2006.01)
CPC H02J 3/28 (2013.01) [H02J 3/007 (2020.01); H02J 7/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system, comprising:
a renewable energy powerplant coupled to an energy grid, the renewable energy powerplant comprising an energy storage system (ESS), the ESS comprising a plurality of energy storage units each comprising an amount of stored energy; and
one or more processors configured to:
for each of the plurality of energy storage units, calculate a length of time to complete discharge for the energy storage unit according to a rated power capacity of the energy storage unit and an amount of stored energy in the energy storage unit;
determine a discharge control protocol for the plurality of energy storage units based on the calculated lengths of time to complete discharge, the discharge control protocol indicating a period of time of at least two periods of time to discharge power to the energy grid and an amount of power of at least two amounts of power to discharge to the energy grid corresponding to the period of time; and
discharge the plurality of energy storage units to the energy grid according to the discharge control protocol.