US 12,272,956 B2
Auxiliary-power-supply unit, auxiliary power supply, and related system and method
David Mark DeMuro, Seattle, WA (US); James Wagoner, Seattle, WA (US); and Alexander Livingston, Seattle, WA (US)
Assigned to JOULE CASE INC., Seattle, WA (US)
Filed by Joule Case Inc., Seattle, WA (US)
Filed on May 19, 2022, as Appl. No. 17/748,888.
Claims priority of provisional application 63/190,390, filed on May 19, 2021.
Prior Publication US 2022/0376511 A1, Nov. 24, 2022
Int. Cl. H02J 3/32 (2006.01); H02J 3/38 (2006.01)
CPC H02J 3/381 (2013.01) [H02J 3/32 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A subgrid assembly, comprising:
a microgrid having an outlet;
a breaker configured
to couple the microgrid to a grid while closed, and
to uncouple the microgrid from the grid while open; and
an auxiliary power supply including a connector and a battery and configured to provide auxiliary power from the battery to the microgrid in response to determining that
the connector is plugged into the outlet of the microgrid,
the breaker is open, and
power from the grid to the breaker is interrupted;
another microgrid including another conductive wire; and
another microgrid interface coupled to the other microgrid and configured,
to detect, on the other conductive wire, the presence of the signal generated by the microgrid interface,
to detect the absence of the signal from the other conductive wire, and
to notify the auxiliary power supply of at least one of the presence of the signal on the other conductive wire and the absence of the signal from the other conductive wire.