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. 07, 2026
Filed:
Jan. 19, 2023
Panasonic Energy Co., Ltd., Osaka, JP;
Osamu Ohashi, Osaka, JP;
Panasonic Energy Co., Ltd., Osaka, JP;
Abstract
A backup power supply includes: a battery module; an MPU; a first power supply circuit configured to supply a power supply voltage from the battery module to the MPU via a switching element; a second power supply circuit configured to convert external power into the power supply voltage to supply the power supply voltage to the MPU, the external power being supplied from a main power supply of an external load connected; and a power supply switching circuit configured to detect an input of the external power so as to control the switching element. the power supply switching circuit is configured to: in an input period during which the external power is supplied, turn off the switching element to stop supplying the power supply voltage from the first power supply circuit and to supply the power supply voltage from the second power supply circuit to the MPU; and in a non-input period during which the external power is not supplied, turn on the switching element to supply the power supply voltage from the first power supply circuit to the MPU.