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. 24, 2012
Filed:
Feb. 26, 2008
Applicants:
Toshitake Kurihara, Nishinomiya, JP;
Tatsuo Mori, Sumoto, JP;
Katsuhiro Suzuki, Sumoto, JP;
Inventors:
Assignee:
Sanyo Electric Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02J 7/00 (2006.01); H01H 35/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The battery pack charging method charges a battery pack, which is a plurality of lithium ion rechargeable batteries connected in series, to full charge by constant current and constant voltage charging. Constant current charging is performed until total voltage reaches a prescribed total voltage. Subsequently, constant current charging is switched to constant voltage charging until full charge is reached. In addition, the voltage of each battery being charged is detected. When the voltage of any battery exceeds a first specified voltage, charging is switched to pulse charging.