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. 25, 2025
Filed:
Apr. 26, 2021
Fdk Corporation, Tokyo, JP;
FDX CORPORATION, Tokyo, JP;
Abstract
Provided is a backup power supply that efficiently supplies power under the control of a microcomputer. The backup power supply is charged by a rectifier for generating power of a predetermined voltage, and supplies power to a load device operating with power supplied from the rectifier when the supplied power is insufficient. The backup power supply includes a secondary battery to be charged with power from the rectifier, a control unit for controlling charging and discharging of the secondary battery, and an input/output voltage detection unit for detecting the output voltage from the rectifier. The control unit stops charging of the secondary battery or reduces a charging current flow of the secondary battery when the output voltage drops to a first threshold voltage or less.