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:
Feb. 21, 2012
Filed:
Apr. 29, 2008
Kaoru Inoue, Hirakata, JP;
Kiyomi Kato, Moriguchi, JP;
Kohei Suzuki, Yao, JP;
Shigeo Ikuta, Kawanabe-gun, JP;
Yusuke Fukumoto, Moriguchi, JP;
Tetsuya Hayashi, Kadoma, JP;
Kaoru Inoue, Hirakata, JP;
Kiyomi Kato, Moriguchi, JP;
Kohei Suzuki, Yao, JP;
Shigeo Ikuta, Kawanabe-gun, JP;
Yusuke Fukumoto, Moriguchi, JP;
Tetsuya Hayashi, Kadoma, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A non-aqueous electrolyte secondary battery including: a positive electrode; a negative electrode; a separator interposed between the positive electrode and the negative electrode; a non-aqueous electrolyte; and a porous insulating film adhered to a surface of at least one selected from the group consisting of the positive electrode and the negative electrode, the porous insulating film including an inorganic oxide filler and a film binder, wherein the ratio R of actual volume to apparent volume of the separator is not less than 0.4 and not greater than 0.7, and wherein the ratio R and a porosity P of the porous insulating film satisfy the relational formula: −0.10≦R−P≦0.30.