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:
Aug. 12, 2014
Filed:
Jul. 15, 2011
Jang-weon Rhee, Daejeon, KR;
Inhwa Jung, Chungcheongnam-do, KR;
Gwigwon Kang, Daejeon, KR;
Youngkeun Lee, Seoul, KR;
Jang-Weon Rhee, Daejeon, KR;
Inhwa Jung, Chungcheongnam-do, KR;
Gwigwon Kang, Daejeon, KR;
Youngkeun Lee, Seoul, KR;
SK Innovation Co., Ltd., Seoul, KR;
Abstract
The present invention relates to a multi-layered microporous polyolefin film for a battery separator and a method for preparing the same. The microporous multi-layered film of the present invention has a characteristics to have both the low shutdown temperature conferred by the polyethylene and the high melt fracture temperature conferred by the polypropylene and heat-resistant filler. In addition, it has the high strength and stability conferred by the micropores prepared under wet process and the high permeability and high strength conferred by the macropores prepared under dry process. Therefore, this multi-layered film can be used effectively to manufacture a secondary battery with high capacity and high power.