Separation membrane for gel-state polymer lithium-ion battery

A power battery and polymer technology, applied in the direction of secondary batteries, battery components, circuits, etc., can solve the problems of industrialized mass production that have not been reported, and achieve improved safety performance, low cost, and high operability Effect

Active Publication Date: 2013-01-09
SHANDONG TIANYANG NEW ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In short, the research and preparation technology of gel polymer electrolyte membranes has gradually matured, but industrial mass production has not been reported yet.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Dissolve 3000g polyvinylidene fluoride, 6000g vinylidene fluoride-hexafluoropropylene copolymer, 800g polyacrylonitrile, 5000g polymethyl methacrylate into 50000g acetone, 2000g ethyl acetate, 1000g ethanol solvent, the dissolution temperature is 40-80 ℃, and then add 2500g of aluminum oxide and 2500g of silicon dioxide for stirring and dispersing to obtain a viscous slurry. Use special coating equipment to coat the prepared viscous slurry on the isolation film made of polypropylene and polyethylene, and dry the slurry-coated isolation film in the oven of the coating equipment, and the isolation film after drying After the film is vacuum baked at 80°C to remove the residual solvent, the separator for the gel-state polymer lithium-ion power battery of the present invention is obtained. According to the requirements of the lithium-ion power battery manufacturer, the separator can be cut into Different width separators.

Embodiment 2

[0021] Dissolve 3000g polyvinylidene fluoride, 3000g vinylidene fluoride-hexafluoropropylene copolymer, 800g polyacrylonitrile, and 4500g polymethyl methacrylate into 15000g acetone, 15000g tetrahydrofuran, 2000g ethyl acetate, and 1000g ethanol solvent. 40-80°C, then add 5000g of aluminum oxide for stirring and dispersing to obtain a viscous slurry, and use special coating equipment to coat the prepared viscous slurry on the isolation film made of polypropylene and polyethylene Above, the separator coated with the slurry is dried in the oven of the coating equipment, and the dried separator is vacuum-baked at 80°C to remove the residual solvent, and the gel-state polymer lithium ion of the present invention is obtained. Separators for power batteries, according to the needs of lithium-ion power battery manufacturers, the separators can be cut into separators of different widths.

Embodiment 3

[0023] Dissolve 4000g polyvinylidene fluoride, 6000g vinylidene fluoride-hexafluoropropylene copolymer, 800g polyacrylonitrile, 5000g polymethylmethacrylate into 50000g N-methylpyrrolidone, 2000g ethyl acetate, 1000g ethanol solvent, dissolve At a temperature of 40-80°C, add 6000g of aluminum oxide to stir and disperse to obtain a viscous slurry. Use special coating equipment to coat the prepared viscous slurry on polypropylene and polyethylene materials. On the film, the separator coated with the slurry is dried in the oven of the coating equipment, and the dried separator is vacuum baked at 80°C to remove the residual solvent, and the gel polymer lithium of the present invention is obtained. Ion power battery separator, according to the needs of lithium ion power battery manufacturers, the separator can be cut into different width separators.

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Abstract

The invention relates to a separation membrane for a gel-state polymer lithium-ion battery. The separation membrane is prepared by using a separation membrane body made of polypropylene and polyethylene materials as a substrate, and coating a layer of polymer colloid material and inorganic filler coating on the surface of substrate. The thickness of the polymer colloid material and inorganic filler coating is 1-5 mu m, and porosity of the separation membrane subjected to coating treatment ranges from 30%-50%. The polymer colloid material is a mixture composed of polyvinylidene fluoride, vinylidene fluoride-hexafluoropropylene copolymer, polyacrylonitrile and polymethyl methacrylate. The inorganic filler is composed of nanoscale inorganic powder material aluminium oxide, silica or their mixture, and the granularity ranges from 50nm to 200nm. The lithium-ion battery manufactured by the separation membrane is good in safety, short circuit resistance, needling resistance, impact resistance and extrusion resistance of the battery are improved, and the separation membrane for the gel-state polymer lithium-ion battery can be widely used in the field of electromobiles, electric motor cars, electric bicycles, large-medium type energy-storage batteries, photovoltaic stations and the like.

Description

technical field [0001] The invention relates to a separator for a gel-state polymer lithium-ion power battery, which is mainly used in a gel-state polymer lithium-ion power battery, and the battery can be widely used in electric vehicles, electric motorcycles, electric bicycles, large and medium-sized storage power supply, photovoltaic power station and other fields. Background technique [0002] Today, with the increasing shortage of oil resources and increasingly serious environmental pollution, the harmonious development of energy, resources, environment and human society has increasingly become the focus of attention, seeking to develop alternative energy sources for traditional petrochemical energy, realizing the development of harmless resource industries, and seeking the harmony between people and the environment. It is particularly urgent to realize the clean energy supply of mainstream vehicles such as automobiles. At present, domestic requirements for pure electri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01M10/0565C08J9/36C08J7/04
CPCY02E60/12Y02E60/10
Inventor 徐建贞朱玉法柳艾美孟庆帅
Owner SHANDONG TIANYANG NEW ENERGY
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