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. 26, 2010
Filed:
Jul. 06, 2005
Tsuyoshi Iijima, Tokyo, JP;
Kazuya Ogawa, Tokyo, JP;
Tsuyoshi Iijima, Tokyo, JP;
Kazuya Ogawa, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A lithium ion secondary battery having a positive electrodewhich contains, as a positive electrode active material, a composite metal oxide containing at least one of Li, Co, Mn, and Ni as a metal component thereof; a negative electrodewhich contains a negative electrode active material; and a nonaqueous electrolyte solution containing a lithium salt. A charging method is characterized in that constant-current charging is performed with use of a set charging current value of equal to or greater than 0.5C and less than 2C ('C' referred to here is a rated capacity value of said lithium ion second battery).