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:
Jul. 05, 2022
Filed:
Aug. 23, 2018
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Tomohiro Usami, Toyota, JP;
Takuya Yamamoto, Nagoya, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
Abstract
A power supply system includes: a first power storage device; a second power storage device having a lower voltage than the first power storage device; a DC-DC converter including a choke coil, a first switching element, a diode connected in parallel with the first switching element, and a second switching element; a semiconductor relay configured to switch a connection state between a second end of the choke coil and the second power storage device; and a controller configured to perform PWM control of the first switching element and the second switching element to control ON and OFF of the semiconductor relay. When an ON time of the second switching element is controlled to become zero and a current flowing out from the second power storage device exceeds a first reference current, the controller reduces a duty ratio of an ON time of the first switching element.