The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 23, 2025
Filed:
Apr. 18, 2023
Vehicle Energy Japan Inc., Ibaraki, JP;
Kazutaka Nishiwaki, Ibaraki, JP;
VEHICLE ENERGY JAPAN INC., Ibaraki, JP;
Abstract
A power supply control device is 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 device includes: a DC/DC converter that supplies electric power from the second power supply to the relay, serving as a backup for the first power supply; a third power supply charged by the first power supply, outputting the charged electric power to the relay; and a control unit that controls the DC/DC converter and second power supply. The control unit turns off the DC/DC converter when the third power supply's voltage is equal to or larger than a first threshold value and turns on the DC/DC converter when the third power supply's voltage is equal to or smaller than a second, lower threshold value.