US 12,463,452 B2
Power supply control device
Daiki Hakushima, Kobe (JP); and Takeshi Matsumoto, Kobe (JP)
Assigned to DENSO TEN Limited, Kobe (JP)
Filed by DENSO TEN Limited, Kobe (JP)
Filed on Jan. 29, 2024, as Appl. No. 18/425,810.
Claims priority of application No. 2023-011573 (JP), filed on Jan. 30, 2023; and application No. 2023-210996 (JP), filed on Dec. 14, 2023.
Prior Publication US 2024/0258825 A1, Aug. 1, 2024
Int. Cl. H02J 9/06 (2006.01); B60L 1/02 (2006.01); B60L 1/14 (2006.01)
CPC H02J 9/06 (2013.01) [B60L 1/02 (2013.01); B60L 1/14 (2013.01); H02J 2310/48 (2020.01)] 12 Claims
OG exemplary drawing
 
1. A power supply control device comprising:
a controller configured to control a connection device provided in an inter-system line connecting a first system and a second system, the first system being configured to supply electric power from a first power supply to a first load, the second system being configured to supply electric power from a second power supply to a second load, wherein
the controller includes:
a comparison circuit configured to compare a parameter related to a power supply failure of the first system or of the second system with a threshold and to output a detection signal indicating an occurrence of the power supply failure;
a pulse generator configured to output a pulse signal having a predetermined pulse width in response to receiving the detection signal and to disconnect the connection device to disconnect connection between the first system and the second system during a period in which the pulse signal is output;
a latch circuit configured to latch the pulse signal; and
a microcomputer configured to periodically acquire a latch state of the latch circuit and to determine, in response to detecting that the pulse signal is latched, in which of the first system and the second system the power supply failure occurs.