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Lithium battery packaging film and preparation method thereof

A lithium battery and packaging film technology, which is applied in the field of lithium battery packaging film and its preparation, can solve the problems of increasing plasma cleaning stations, increasing plasma cleaning processes, and affecting production line efficiency, so as to avoid plasma cleaning stations and save Plasma cleaning process, the effect of improving production line efficiency

Pending Publication Date: 2020-09-04
湖南领湃科技股份有限公司 +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual production, it is necessary to increase the number of plasma cleaning stations, which increases the cost of the production line, and adds a step of plasma cleaning process, which affects the efficiency of the production line

Method used

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  • Lithium battery packaging film and preparation method thereof
  • Lithium battery packaging film and preparation method thereof
  • Lithium battery packaging film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Step S1: Add the dried PET chip or PET base material (95% by mass fraction) and boron nitride particles (5% by mass fraction) into a high-speed mixer, and mix at high speed for 10 minutes. After premixing, mix the mixed materials again After drying in a blast drying oven for 2 hours, the above mixture is fed to a twin-screw high-speed disperser, and the heating temperature of each zone of the twin-screw is controlled between 200°C and 280°C, and gradually dispersed evenly through the twin-screw high-shear, and then transferred to the casting machine. Quantitative extrusion of the mold, cooling cast film after quantitative casting, to obtain PET film.

[0055] Step S2: After preheating the PET film (Tg<preheating temperature<Tm, 210°C~240°C), perform synchronous or asynchronous stretching in the MD (machine direction) and TD (perpendicular to the machine direction) directions to obtain a thickness of 100 μm PET insulation layer.

[0056] Step S3: heat-setting and coolin...

Embodiment 2

[0059] Different from Example 1, the thickness of the nano titanium dioxide layer in Example 2 is 4 μm.

Embodiment 3

[0061] Different from Example 1, the thickness of the nano titanium dioxide layer in Example 3 is 5 μm.

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Abstract

The invention provides a lithium battery packaging film and a preparation method thereof, and the lithium battery packaging film comprises an insulating layer which coats a shell of a lithium battery;and a nanometer titanium dioxide layer, wherein the nanometer titanium dioxide layer is located on the insulating layer. The preparation method comprises the following steps of mixing a polyester material and a heat-conducting material to melt the insulating material, and forming an insulating film after cold casting; stretching the insulating film to a specific thickness to form the insulating layer; and forming the nano titanium dioxide layer on the insulating layer. The nano titanium dioxide layer can enable the surface of the lithium battery packaging film to have self-cleaning capacity,a plasma cleaning procedure can be omitted, the production line efficiency is improved, meanwhile, a plasma cleaning station is prevented from being added, and the production line cost is reduced.

Description

technical field [0001] The present application relates to the technical field of energy storage devices, in particular to a lithium battery packaging film and a preparation method thereof. Background technique [0002] With the increasing environmental pollution, the new energy industry has attracted more and more attention. Lithium batteries are an important part of many electronic products, energy storage products and electric vehicles, and their performance will directly affect the promotion and use of related products. According to the classification of lithium battery outsourcing materials, lithium batteries can be mainly divided into two types: metal shell lithium batteries and soft pack batteries. [0003] For metal-case lithium batteries, many issues need to be considered during design and manufacture, such as the need to prevent short-circuiting of the external casing of metal-case lithium batteries; metal-case lithium batteries must have better heat dissipation per...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/02H01M10/052C09J7/25C09J7/38C09J133/04B82Y30/00B82Y40/00H01M50/124
CPCH01M10/052C09J7/255C09J7/385C09J133/04B82Y30/00B82Y40/00C09J2203/326C09J2467/006C09J2433/00Y02E60/10
Inventor 冯成伟崔立丰
Owner 湖南领湃科技股份有限公司
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