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. 14, 2003
Filed:
Feb. 05, 2002
Applicant:
Inventors:
Kensaku Matsuda, Tokyo, JP;
Manabu Yamamoto, Tokyo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 1/076 ;
U.S. Cl.
CPC ...
H01M 1/076 ;
Abstract
A battery of an uninterruptible power supply unit is configured by at least two batteries (a first battery and a second battery ). A control circuit judges opened/closed states of a first cover and a second cover on the basis of information from a first cover-opening detecting device and a second cover-opening detecting device . When the first cover is opened, a first switch which connects a charge and discharge circuit to the first battery is opened, and, when the second cover is opened, a second switch which connects the charge and discharge circuit to the second battery is opened.