US 12,420,669 B2
Power supply control device
Kazutaka Nishiwaki, Ibaraki (JP)
Assigned to VEHICLE ENERGY JAPAN INC., Ibaraki (JP)
Appl. No. 18/718,926
Filed by VEHICLE ENERGY JAPAN INC., Ibaraki (JP)
PCT Filed Apr. 18, 2023, PCT No. PCT/JP2023/015516
§ 371(c)(1), (2) Date Jun. 12, 2024,
PCT Pub. No. WO2023/204217, PCT Pub. Date Oct. 26, 2023.
Claims priority of application No. 2022-068449 (JP), filed on Apr. 18, 2022.
Prior Publication US 2025/0033525 A1, Jan. 30, 2025
Int. Cl. B60L 58/18 (2019.01); H02J 7/34 (2006.01)
CPC B60L 58/18 (2019.02) [H02J 7/34 (2013.01); B60L 2210/10 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A power supply control device applied to a vehicle equipped with:
electrical equipment;
a relay connected to the electrical equipment;
a first power supply that makes the relay operable; and
a second power supply that discharges electricity to the electrical equipment via the relay,
the power supply control device comprising:
a DC/DC converter that supplies electric power to the relay from the second power supply as a backup for the first power supply;
a third power supply that is charged by the first power supply and outputs the charged electric power to the relay; and
a control unit that controls operations of the DC/DC converter and the second power supply,
wherein the control unit turns off the DC/DC converter when a voltage of the third power supply is equal to or larger than a first threshold value; and
wherein the control unit turns on the DC/DC converter when the voltage of the third power supply is equal to or smaller than a second threshold value, which is smaller than the first threshold value.