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:
Oct. 31, 2006
Filed:
Feb. 28, 2005
Takashi Shimoyamada, Tokyo, JP;
Fumihata Yamamoto, Tokyo, JP;
Koichi Kawamura, Yokohama, JP;
Takashi Hayashi, Sodegaura, JP;
Akio Hiwara, Sodegaura, JP;
Takashi Shimoyamada, Tokyo, JP;
Fumihata Yamamoto, Tokyo, JP;
Koichi Kawamura, Yokohama, JP;
Takashi Hayashi, Sodegaura, JP;
Akio Hiwara, Sodegaura, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A nonaqueous electrolyte secondary battery includes an electrode group prepared by winding spirally or in a flattened shape a laminate structure including a separator interposed between positive and negative electrodes, and a nonaqueous electrolyte held by the electrode group, wherein an edge portion of the separator in a direction perpendicular to a winding direction protrudes outward from edges of the positive and negative electrodes in the direction perpendicular to the winding direction, and the separator satisfies conditions given by formulas (1) to (3) given below:0≦≦(/1.5)≦10  (1)X≦10  (2)X≦Y≦20.  (3)