US 11,837,911 B2
Power supply control apparatus and power supply control method
Takeshi Matsumoto, Kobe (JP); and Daiki Hakushima, Kobe (JP)
Assigned to DENSO TEN LIMITED, Kobe (JP)
Filed by DENSO TEN Limited, Kobe (JP)
Filed on Mar. 21, 2022, as Appl. No. 17/700,070.
Claims priority of application No. 2021-148882 (JP), filed on Sep. 13, 2021.
Prior Publication US 2023/0077421 A1, Mar. 16, 2023
Int. Cl. H02J 9/06 (2006.01); H02J 1/08 (2006.01); H02J 1/02 (2006.01); H02H 3/16 (2006.01)
CPC H02J 9/061 (2013.01) [H02H 3/16 (2013.01); H02J 1/02 (2013.01); H02J 1/086 (2020.01)] 14 Claims
OG exemplary drawing
 
1. A power supply control apparatus comprising:
a first system configured to supply electric power of a first power supply to a first load;
a second system configured to supply electric power of a second power supply to a second load;
an inter-system switch provided in a connection path that connects the first system to the second system, and capable of connecting the first system to the second system and disconnecting the first system from the second system;
a primary ground fault detection hardware circuit configured to cut off the inter-system switch when a ground fault of the first system or the second system is detected by the primary ground fault detection hardware circuit; and
at least one processor configured to implement:
monitoring the first system or the second system where the ground fault continues for a predetermined period in a case where the ground fault of the first system or the second system is detected by the primary ground fault detection hardware circuit, and reconnecting the inter-system switch when the ground fault is eliminated; and
setting a cutoff prohibition period when the inter-system switch is reconnected, and prohibiting cutoff of the inter-system switch by the primary ground fault detection hardware circuit during the cutoff prohibition period.