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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 10497914 B1

PDFFull Text
Date of Patent:
Dec. 03, 2019

Filed:

Jul. 11, 2014

Water-based composition used for modifying diaphragm for lithium batteries and modified diaphragm and batteries

Applicant:

Chengdu Zhongke Laifang Power Science & Technology Co., Ltd., Sichuan, CN;

Inventors:

Zhonglai Pan, Sichuan, CN;

Lu Wang, Sichuan, CN;

Jiandong Gao, Sichuan, CN;

Rengui Li, Sichuan, CN;

Hongchang Du, Sichuan, CN;

Jiamin Deng, Sichuan, CN;

Zhenghua Deng, Sichuan, CN;

Assignee:

CHENGDU ZHONGKE LAIFANG POWER SCIENCE & TECHNOLOGY CO., LTD., Chengdu, CN;

Attorney:

Caesar Rivise, PC

Primary Examiner:

Cynthia H Kelly

Assistant Examiner:

Monique M Wills

Int. Cl.
CPC ...
H01M 2/16 (2006.01); C09D 7/40 (2018.01); B32B 27/32 (2006.01); C09D 133/02 (2006.01); C09D 133/08 (2006.01); C09D 133/10 (2006.01); C09D 133/12 (2006.01); C09D 175/04 (2006.01); C09J 11/08 (2006.01); H01M 2/14 (2006.01); H01M 10/052 (2010.01); C08J 7/04 (2006.01); C09D 125/16 (2006.01); C09D 129/04 (2006.01); C09D 133/14 (2006.01); C08K 9/04 (2006.01); H01M 10/0525 (2010.01); C08K 3/22 (2006.01);
U.S. Cl.
CPC ...
H01M 2/1653 (2013.01); B32B 27/32 (2013.01); C08J 7/047 (2013.01); C09D 7/40 (2018.01); C09D 125/16 (2013.01); C09D 129/04 (2013.01); C09D 133/02 (2013.01); C09D 133/08 (2013.01); C09D 133/10 (2013.01); C09D 133/12 (2013.01); C09D 133/14 (2013.01); C09D 175/04 (2013.01); C09J 11/08 (2013.01); H01M 2/145 (2013.01); H01M 2/166 (2013.01); H01M 2/1686 (2013.01); H01M 10/052 (2013.01); C08J 2323/02 (2013.01); C08J 2423/08 (2013.01); C08K 3/22 (2013.01); C08K 9/04 (2013.01); C08K 2201/011 (2013.01); H01M 10/0525 (2013.01); Y02T 10/7011 (2013.01);
Abstract

The invention belongs to the technical field of the preparation of lithium ion batteries, and particularly relates to a water-based composition used for modifying diaphragm of lithium ion batteries and a polyolefin diaphragm for lithium ion batteries and lithium ion batteries. The invention aims to improve the strength of the battery cell, to reduce the expansion of thickness of battery cell at high temperature and to simplify the battery production process. The water-based composition for modifying the diaphragm for the lithium ion battery comprises a water-based adhesive for the lithium ion battery and organic nano-particle fillings dispersed in the water-based adhesive; the organic nano-particle fillings are nano-particles of the polymers 1 or nano-particles at least wrapped with the polymers 1 on the surfaces; and the particle sizes of the organic nano-particles are 50 to 2000 nm. The polymers 1 are selected from at least one of polymethyl methacrylate (PMMA), ethylene-vinyl acetate copolymer (EVA), ethylene-acrylate copolymer (EAA), ethylene-butyl acrylate copolymer (EBA), ethylene-methyl acrylate copolymer (EMA), ethylene-ethyl acrylate copolymer (EEA) or polyurethane (PTU) polymer.

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