Title:
LITHIUM ION BATTERY HAVING GOOD THERMAL SAFETY
Document Type and Number:
WIPO Patent Application WO/2016/187811
Kind Code:
A1
Abstract:
Disclosed is a lithium ion battery having good thermal safety. The lithium ion battery comprises a shell and a lithium core encapsulated in the shell; the lithium core comprises a positive plate, a negative plate, and a polymer polypropylene diaphragm arranged between the positive plate and the negative plate, wherein the thickness of the polymer polypropylene diaphragm is 20-30 μm, micropores with apertures of 0.03-0.1 μm are provided on the polymer polypropylene diaphragm, and a porosity of the polymer polypropylene diaphragm is 30%-40%; one Al2O3/SiO2 composite ceramic coatings with thicknesses of 2-4 μm is separately arranged at the two sides of the polymer polypropylene diaphragm; and the lithium core is formed by winding the positive plate, the negative plate, and the polymer polypropylene diaphragm. A lithium ion battery is provided with a diaphragm that is provided with ceramic coatings and has excellent thermal stability, such that the thermal safety performance of the lithium ion battery can be effectively improved, and the service life of the lithium ion battery is prolonged.
Inventors:
LUO MINGJING (CN)
Application Number:
PCT/CN2015/079826
Publication Date:
December 01, 2016
Filing Date:
May 26, 2015
Export Citation:
Assignee:
LUO MINGJING (CN)
International Classes:
H01M50/443; H01M50/489
Foreign References:
| CN104577010A | 2015-04-29 | |||
| CN104409674A | 2015-03-11 | |||
| CN101281961A | 2008-10-08 | |||
| US20110183203A1 | 2011-07-28 |
Attorney, Agent or Firm:
MING & YUE INTELLECTUAL PROPERTY LAW FIRM (6/F Block 206, Nanyou Second Industrial Zone, No.21 Dengliang Road, Nansha, Shenzhen Guangdong 4, CN)
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