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. 28, 2012
Filed:
Sep. 07, 2004
Akira Kinoshita, Kobe, JP;
Shingo Tode, Kobe, JP;
Yasufumi Takahashi, Kobe, JP;
Hiroyuki Fujimoto, Kobe, JP;
Ikuro Nakane, Kobe, JP;
Shin Fujitani, Kobe, JP;
Akira Kinoshita, Kobe, JP;
Shingo Tode, Kobe, JP;
Yasufumi Takahashi, Kobe, JP;
Hiroyuki Fujimoto, Kobe, JP;
Ikuro Nakane, Kobe, JP;
Shin Fujitani, Kobe, JP;
SANYO Electric, Co., Ltd., Osaka, JP;
Abstract
Capacity degradation due to charge/discharge cycles is suppressed in either a non-aqueous electrolyte secondary cell provided with a positive electrode including, as a positive electrode active material, a lithium-transition metal complex oxide having a layered structure and containing at least Ni and Mn as transition metals, and a negative electrode containing a carbon material as a negative electrode active material and having a higher initial charge-discharge efficiency than that of the positive electrode, or an assembled battery having a plurality of cells each of which is the secondary cell. A control circuit incorporated in the secondary cell or the assembled battery, or in an apparatus using the secondary cell or the assembled battery, monitors the voltage of the secondary cell or each of the cells in the assembled battery so that the end-of-discharge voltage of each cell is 2.9 V or higher.