US 12,394,974 B2
Power supply control apparatus and power supply control method
Takeshi Matsumoto, Kobe (JP)
Assigned to DENSO TEN Limited, Kobe (JP)
Filed by DENSO TEN Limited, Hyogo (JP)
Filed on Mar. 22, 2023, as Appl. No. 18/187,787.
Claims priority of application No. 2022-071687 (JP), filed on Apr. 25, 2022; and application No. 2022-208464 (JP), filed on Dec. 26, 2022.
Prior Publication US 2023/0344216 A1, Oct. 26, 2023
Int. Cl. H02H 3/16 (2006.01); H02H 3/02 (2006.01)
CPC H02H 3/16 (2013.01) [H02H 3/021 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A power supply control apparatus comprising:
a first connection device provided in an inter-system line that connects (i) a first system configured to supply electric power of a first power supply to a first system load and a second system load and (ii) a second system configured to supply electric power of a second power supply to the second system load;
a second connection device provided between the second system load and a connection point between the second system and the inter-system line;
a first voltage sensor provided in the first system and configured to detect a voltage of the first system;
a second voltage sensor provided in the second system and configured to detect a voltage of the second system; and
a controller that performs a first fail-safe control by bringing the first connection device and the second connection device into a disconnected state so that the electric power of the first power supply is supplied to the first system load and the second system load when a ground fault of the second system is detected by comparing the voltage detected by the first voltage sensor and the voltage detected by the second voltage sensor to a ground fault threshold and determining that the voltage detected by the second voltage sensor is equal to or less than the ground fault threshold, and that performs a second fail-safe control by bringing the first connection device into a conductive state while keeping the second connection device in a disconnected state so that the electric power of the second power supply is supplied to the second system load through the first connection device and the first system when a failure of the first power supply is detected during the first fail-safe control.