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:
Aug. 11, 2015
Filed:
Feb. 15, 2011
Applicant:
Kuniaki Arai, Tokyo, JP;
Inventor:
Kuniaki Arai, Tokyo, JP;
Assignee:
RICOH ELECTRONIC DEVICES CO., LTD., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02J 7/00 (2006.01); H01M 10/42 (2006.01);
U.S. Cl.
CPC ...
H02J 7/0026 (2013.01); H01M 10/425 (2013.01); H02J 7/0016 (2013.01); H01M 2200/00 (2013.01);
Abstract
A secondary cell protection circuit configured to protect plural secondary cells connected in series is disclosed that includes plural switching parts configured to be connected in parallel with the secondary cells respectively; and a charge controller configured to turn on the switching part connected to the secondary cell of which cell voltage is greater than or equal to a return voltage, and to turn off the switching part when all cell voltages of the secondary cells become greater than or equal to the return voltage, when the secondary cells are being charged.