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:
Jun. 02, 2015
Filed:
Dec. 07, 2011
Shouichiro Sawa, Kobe, JP;
Atsushi Fukui, Kobe, JP;
Yasunori Watanabe, Kobe, JP;
Taizou Sunano, Kobe, JP;
Shouichiro Sawa, Kobe, JP;
Atsushi Fukui, Kobe, JP;
Yasunori Watanabe, Kobe, JP;
Taizou Sunano, Kobe, JP;
SANYO Electric Co., Ltd., Daito-shi, JP;
Abstract
A lithium secondary battery and a method for producing the lithium secondary battery. The lithium secondary battery includes a negative electrodein which negative electrode mixture layersandthat contain active material particles containing silicon and/or a silicon alloy and a binder are disposed on the surfaces of a current collector. A electrode body is formed by spirally winding, from inside to outside, a laminate body; and in an outer end portion of the negative electrode, the negative electrode mixture layersandhave tapering portionsandwhose thicknesses decrease toward endsandof the negative electrode mixture layersand; and oozing portionsandmainly containing the binder are formed at the tips of the tapering portionsandof the negative electrode mixture layersand