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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.:

US 10135053 B1

PDFFull Text
Date of Patent:
Nov. 20, 2018

Filed:

Aug. 06, 2014

Method of manufacturing porous separator comprising elastic material, porous separator manufactured by the method, and secondary battery comprising the separator

Applicant:

Lg Chem, Ltd., Seoul, KR;

Inventors:

Joo-Sung Lee, Daejeon, KR;

Byoung-Jin Shin, Daejeon, KR;

Dong-Wook Sung, Daejeon, KR;

Jong-Hun Kim, Daejeon, KR;

Assignee:

LG Chem, Ltd., , KR;

Attorney:

Lerner, David, Littenberg, Krumholz & Mentlik, LLP

Primary Examiner:

Ula C Ruddock

Assistant Examiner:

Matthew W Van Oudenaren

Int. Cl.
CPC ...
H01M 2/16 (2006.01); H01M 2/14 (2006.01); B29C 47/00 (2006.01); B29C 55/06 (2006.01); B29C 71/02 (2006.01); B29C 55/00 (2006.01); B29C 47/14 (2006.01); B29C 47/20 (2006.01); B29C 47/40 (2006.01); B29C 47/92 (2006.01); B29K 23/00 (2006.01); B29K 105/00 (2006.01); B29K 105/04 (2006.01);
U.S. Cl.
CPC ...
H01M 2/1653 (2013.01); B29C 47/0011 (2013.01); B29C 47/0019 (2013.01); B29C 47/0057 (2013.01); B29C 47/14 (2013.01); B29C 47/20 (2013.01); B29C 47/40 (2013.01); B29C 47/92 (2013.01); B29C 55/005 (2013.01); B29C 55/06 (2013.01); B29C 71/02 (2013.01); H01M 2/145 (2013.01); B29C 2071/022 (2013.01); B29C 2947/92704 (2013.01); B29K 2023/06 (2013.01); B29K 2023/12 (2013.01); B29K 2105/0088 (2013.01); B29K 2105/04 (2013.01); B29K 2995/0051 (2013.01);
Abstract

Disclosed is a method of manufacturing a porous separator including an elastic material, and a separator manufactured by the method. The separator includes an elastic material being uniformly dispersed in a polymer at a weight ratio of 40:60 to 5:95, and a value of elongation at break in a low tensile strength direction at room temperature is greater than or equal to 250%. In addition, the method of manufacturing a porous separator includes forming an extruded sheet by extruding a mixture of a polymer and an elastic material at a weight ratio of 95:5 to 60:40, forming a film by annealing and stretching the extruded sheet, and forming a porous separator by heat setting the stretched film. Accordingly, a thermal shrinkage ratio of the film is reduced and an elongation at break is greatly increased, to provide a porous separator with improved stability.

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