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:
Mar. 03, 2026
Filed:
Jun. 20, 2024
Jtekt Corporation, Kariya, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Hiroki Nitta, Okazaki, JP;
Tokuaki Hibino, Toyota, JP;
Daiki Inaba, Okazaki, JP;
Kohei Ota, Kariya, JP;
Yosuke Yamashita, Nagoya, JP;
Fumihiko Sato, Okazaki, JP;
JTEKT CORPORATION, Kariya, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
Abstract
A control circuit of a power supply device forms a state in which an auxiliary power supply is connected via a charge circuit to a main power supply when a power switch provided on a power feeding path is turned on. The control circuit calculates an internal resistance of the auxiliary power supply based on a charging current. The control circuit forms a state in which the power supply device is disconnected from the main power supply and a power feeding target, and only the auxiliary power supply and a boost circuit are connected to each other when the power switch is turned off. The control circuit disconnects the auxiliary power supply from the boost circuit when a terminal voltage of the auxiliary power supply is less than a stop determination threshold value.