US 12,360,167 B2
Energy storage system and method of control
Jason Stuart Katcha, Cedarburg, WI (US); and Nathan Timothy Larsen, Milwaukee, WI (US)
Assigned to Unico, LLC, Franksville, WI (US)
Filed by Present Power Systems, LLC, Cedarburg, WI (US)
Filed on May 11, 2023, as Appl. No. 18/196,352.
Claims priority of provisional application 63/473,260, filed on May 11, 2022.
Prior Publication US 2023/0369982 A1, Nov. 16, 2023
Int. Cl. G01R 31/382 (2019.01); H02J 1/10 (2006.01); H02J 3/32 (2006.01); H02J 3/38 (2006.01); H02J 7/35 (2006.01); H02M 1/00 (2007.01)
CPC G01R 31/382 (2019.01) [H02J 1/102 (2013.01); H02J 3/32 (2013.01); H02J 3/381 (2013.01); H02J 7/35 (2013.01); H02M 1/007 (2021.05); H02J 2300/22 (2020.01)] 14 Claims
OG exemplary drawing
 
1. A system for powering an alternating current (AC) load from direct current (DC) power, the power converter comprising:
one or more DC-DC power converters each having a first port connected to a battery or energy source, each of the converters also having a second port;
a DC-AC power inverter having a DC port electrically connected to the second port of each of the DC-DC power converters and an AC port configured to provide AC power to one or more of an AC load or AC utility grid;
a sensor configured to detect a power flow variable at the AC port of the DC-AC power inverter; and
a controller in communication with the sensor and each of the DC-DC power converters, the controller configured to:
determine a current output for each of the DC-DC power converters based at least in part on the power flow variable of the sensor; and
send a command to the one or more of the DC-DC power converters causing the one or more DC-DC converters to output a DC current conforming to the determined current output, the DC current being sent from the second port to the DC port of the DC-AC power inverter.