US 11,916,511 B1
Solar-battery integrated DC system
Stanley Atcitty, Albuquerque, NM (US); Valerio De Angelis, Santa Barbara, CA (US); Satishkumar J. Ranade, Las Cruces, NM (US); Sijo Augustine, Las Cruces, NM (US); Nataraj Pragallapati, Edison, NJ (US); and Olga Lavrova, Las Cruces, NM (US)
Assigned to National Technology & Engineering Solutions of Sandia, Albuquerque, NM (US); Arrowhead Center, Inc., Las Cruces, NM (US); and Valerio De Angelis, Santa Barbara, CA (US)
Filed by National Technology & Engineering Solutions of Sandia, LLC, Albuquerque, NM (US); Urban Electric Power, Pearl River, NY (US); and Arrowhead Center, Inc., Las Cruces, NM (US)
Filed on Oct. 13, 2021, as Appl. No. 17/500,632.
Claims priority of provisional application 63/090,810, filed on Oct. 13, 2020.
Int. Cl. H02J 7/00 (2006.01); H02S 40/32 (2014.01); H02S 40/38 (2014.01)
CPC H02S 40/32 (2014.12) [H02J 7/0068 (2013.01); H02S 40/38 (2014.12); H02J 2300/26 (2020.01)] 19 Claims
OG exemplary drawing
 
1. A solar-battery integrated DC system for controlling current flow on a direct current (DC) bus, comprising:
a controller comprising:
a pair of input terminals for receiving a DC battery voltage from a battery;
a switching module for controlling a bi-directional current flow between the battery and the DC bus, the switching module having a pair of output terminals and photovoltaic (PV) and Battery voltage and current sensors;
a control path for controlling the switching module, the control path comprising:
a current generator to generate a reference current in response to a reference voltage detected by the voltage sensor; and
a comparator connected at the output of the current generator, the comparator configured to compare the reference current with a battery current and output a signal to a controller module; the controller module configured to generate a reference value; and
a pulse width modulating generator configured to receive the reference value and modulate the switch module to control current flow and energy flow between the DC bus and the battery to adjust the controller output voltage to match the DC bus;
wherein the DC bus is further connected to a PV array; and
wherein the DC bus is connected to an inverter, the inverter controlling alternating current (AC) to inverter output terminals.