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. 17, 2003
Filed:
Dec. 14, 2000
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
The nonaqueous secondary battery according to the invention uses a separator which is a composite resin film with a reinforcing material layer integrally filled with polyvinylidene fluoride resin or a separator which is a composite resin film with a polyvinylidene fluoride resin layer and a reinforcing material layer stacked thereon. In this way, when the reinforcing material layer is integrally filled with the polyvinylidene fluoride (PVdF) resin , or the reinforcing material layer is stacked on the polyvinylidene fluoride (PVdF) resin layer , even if the polyvinylidene fluoride resin swells, its swelling is limited by the reinforcing material layer in the directions of width and length so that the separator or does not wrinkle.