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:
Jan. 21, 2020
Filed:
Apr. 27, 2016
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, Ibaraki, JP;
Fumihiro Sato, Tokyo, JP;
Takae Shimada, Tokyo, JP;
Takuya Ishigaki, Tokyo, JP;
Takayuki Ouchi, Tokyo, JP;
Hiroyuki Shoji, Hitachinaka, JP;
Naoya Takahashi, Hitachinaka, JP;
Eigo Kishimoto, Hitachinaka, JP;
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, JP;
Abstract
An object of the present invention is to provide a charging apparatus having high efficiency of charging a battery by inputting an alternating current voltage. A charging apparatus that charges a direct current battery includes a step-down converter unit to which a direct current voltage from a power supply is input and that converts the direct current voltage, and when a voltage of the direct current battery is between a predetermined first voltage smaller than a charge completion voltage of the direct current battery and the charge completion voltage, a variable voltage that increases from the first voltage to the charge completion voltage in accordance with charging of the direct current battery is input to the step-down converter unit.