A kind of low-temperature plasma-treated solar cell back film and preparation method thereof

A low-temperature plasma and solar cell technology, applied in chemical instruments and methods, circuits, photovoltaic power generation, etc., can solve the problems of unstable fluorosiloxane compounds and silicon-titanium compounds, difficult process uniformity, and insufficient adhesion. , to achieve the effect of convenient continuous production, large surface tension and high bonding strength

Active Publication Date: 2016-04-20
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the above scheme has complicated process, instability of fluorosiloxane compound and silicon titanium compound at high temperature, difficulty in uniform spraying, rolling coating or immersion, etc. Defects such as insufficient adhesion between the base film layer and the base layer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 As shown, a low-temperature plasma-treated solar cell back film is mainly composed of a base layer 1 and a fluorine-based film layer 2, wherein the surface of the base layer has a plasma-treated film layer II3; the fluorine-based film The surface of the film layer 2 has a plasma-treated film layer I4 and the surface of the plasma-treated film layer I4 has a plasma-treated surface graft copolymer layer I5, which is prepared according to the following method:

[0034] (1) Conduct water vapor microwave low-temperature plasma treatment on the surface of the THV base film layer 2 of the terpolymer of tetrafluoroethylene, hexafluoropropylene and vinylidene fluoride with a thickness of 12 μm to form a plasma-treated THV base film Layer 4, the thickness of the plasma-treated THV base film layer 4 is controlled at about 0.5 μm;

[0035] (2) Acrylic acid gas low-temperature plasma treatment is performed on the surface of the plasma-treated THV base film layer 4 of st...

Embodiment 2

[0040] The other operations of this embodiment are the same as those of embodiment 1, the differences are:

[0041] In step (1): the fluorine-based membrane layer 2 is a polytetrafluoroethylene PTFE-based membrane layer, the thickness of the fluorine-based membrane layer 2 is 20 μm, and the thickness of the plasma-treated PTFE-based membrane layer 4 is 5 μm;

[0042] In step (2), the thickness of the surface graft copolymer layer 5 is controlled at 2 μm;

[0043] In step (3), the base layer 1 is a polymer material base layer made of liquid crystal polymer or PBT resin or PEN resin by hot melt blending modified PET resin, wherein the content of liquid crystal polymer or PBT resin or PEN resin is 30 wt. %, and the thickness of the base layer 1 is 300 μm, and the thickness of the plasma-treated PET base film layer 3 is 2 μm.

[0044] The test results are shown in Table 1.

Embodiment 3

[0046] The other operations of this embodiment are the same as those of embodiment 1, the differences are:

[0047] In step (1): the fluorine-based film layer 2 is a polyvinyl fluoride PVF-based film layer, the thickness of the fluorine-based film layer 2 is 1 μm, and the thickness of the plasma-treated PVF base film layer 4 is 0.05 μm;

[0048] In step (2), the thickness of the surface graft copolymer layer 5 is controlled at 0.2 μm;

[0049] In step (3), the base layer 1 is a polymer material base layer made of liquid crystal polymer or PBT resin or PEN resin by hot melt blending modified PET resin, wherein the content of liquid crystal polymer or PBT resin or PEN resin is 10 wt. %, and the thickness of the base layer 1 is 10 μm, and the thickness of the plasma-treated PET base film layer 3 is 0.4 μm.

[0050] In step (4), the bonding temperature is 50°C, and the baking time is 5s.

[0051] The test results are shown in Table 1.

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Abstract

The invention belongs to the technical field of solar battery packaging assemblies and particularly relates to a solar battery back film subject to low-temperature plasma treatment. The solar battery back film is mainly formed by adhering a base layer and a fluorine-based film layer, wherein the surface of the base layer is provided with a plasma-treated film layer II or a plasma treatment surface grafting copolymer layer II, the surface of the fluorine-based film layer is provided with a plasma-treated film layer I, and the surface of the plasma-treated film layer I is provided with a plasma treatment surface grafting copolymer layer I. The invention further provides a preparation method of the solar battery back film. As the plasma-treated film layers and the plasma treatment surface grafting copolymer layers assist in blocking water vapor, the solar battery back film has the characteristics of better weather resistance, good chemical resistance and excellent electrical insulation. The preparation method is very quick in response, can achieve an expected purpose in a few seconds, is very suitable for a circulation system and facilitates continuous production of the solar battery back film.

Description

Technical field [0001] The invention belongs to the field of solar cell packaging technology components, and particularly relates to a low-temperature plasma-treated solar cell back film with high adhesion, high weather resistance, and high electrical insulation and a preparation method thereof. Background technique [0002] After the solar cell is welded between the cell and the interconnection bar and the cell and the cell are welded in series, a fixed specification cell string is formed. A certain number of cell strings are spliced ​​into a module, and the confluence is drawn out after welding. Article. Laminate the materials in the order of tempered glass, EVA, battery pack, EVA, and back plate material. The solar cell is laminated and encapsulated by high-temperature melting EVA adhesive to form a component. The solar panel is formed by framing the junction box. [0003] As an important component in the solar cell packaging technology, the solar cell back film is used to im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/049H01L31/18B32B27/08B32B27/16
CPCY02E10/50Y02P70/50
Inventor 金志洪包大新李玉平傅晓敏
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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