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. 12, 2013
Filed:
Mar. 28, 2008
Yasunori Baba, Moriguchi, JP;
Naoki Imachi, Moriguchi, JP;
Takeshi Ogasawara, Moriguchi, JP;
Abstract
A non-aqueous electrolyte secondary battery is provided that remarkably improves battery reliability by quickly lowering the potential of the positive electrode while preventing separator shrinkage at high temperatures. A separator has on its surface a shrinkage-prevention-layer formed portion (), in which a layer for preventing separator shrinkage is formed, and a shrinkage-prevention-layer unformed portion (), in which the layer for preventing separator shrinkage is not formed. A positive electrode current collector and a negative electrode current collector respectively have a positive electrode current collector exposed portion () and a negative electrode current collector exposed portion (). The shrinkage-prevention-layer unformed portion () of the separator is disposed at a region where the current collector exposed portions () face each other.