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A kind of solar battery back plate film and preparation method thereof

A technology for solar cells and backsheet films, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of low adhesiveness of backsheet films, and achieve the effects of good adhesiveness, easy operation and large specific surface area.

Active Publication Date: 2016-05-18
NINGBO CHANGYANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the defect of low adhesiveness of the existing back sheet film, the invention provides a solar cell back sheet film and a preparation method thereof. cohesion between

Method used

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  • A kind of solar battery back plate film and preparation method thereof
  • A kind of solar battery back plate film and preparation method thereof
  • A kind of solar battery back plate film and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0055] (1) Preparation of the base layer

[0056] The base layer of the backsheet film is prepared by three-layer co-extrusion and biaxial stretching process,

[0057] Among them, the main extrusion layer adopts the following formula (weight percentage):

[0058] PET glossy material 60-90%

[0059] Filling particles 10-40%

[0060] The auxiliary extrusion layer uses the following formula (weight percentage):

[0061]

[0062] The filler particles and foaming agent are added in the form of a masterbatch, and the masterbatch is made as follows: the filler particles and polyester chips are melt-mixed, extruded, and granulated to prepare the filler particles with a weight percentage of 30-50% Filling particle masterbatch; foaming agent and polypropylene (PP, melting point 165°C) slices are melted and mixed, extruded, and granulated to prepare a foaming agent masterbatch with a weight percentage of 10-20% of the foaming agent (PP masterbatch). Filling particle masterbatch i...

Embodiment 1

[0079] The solar battery backsheet film was prepared according to the aforementioned method, and the total thickness of the base layer was 180 μm.

[0080] Among them, the main extrusion layer adopts the following formula (weight percentage):

[0081] PET glossy material 80%

[0082] Fill particles 20%

[0083] The auxiliary extrusion layer adopts the following formula (weight percentage):

[0084]

[0085] Lay a fluorine protective layer on both sides of the base layer according to the above method, with a thickness of 35 μm, and use the following bonding layer coating formula (weight percentage):

[0086]

[0087]

[0088] The performance measurement results of the obtained backsheet composite film are shown in Table 1.

Embodiment 2

[0090] The solar cell backsheet film was prepared according to the aforementioned method, and the total thickness of the base layer was 200 μm.

[0091] Among them, the main extrusion layer adopts the following formula (weight percentage):

[0092] PET glossy material 80%

[0093] Fill particles 20%

[0094] The auxiliary extrusion layer adopts the following formula (weight percentage):

[0095]

[0096] According to the above method, compound a fluorine protective layer on both sides of the base layer, with a thickness of 30 μm, and use the following bonding layer coating formula (weight percentage):

[0097]

[0098] The performance measurement results of the obtained backsheet composite film are shown in Table 1.

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Abstract

The invention relates to the technical field of solar battery backplanes, in particular to a solar battery backplane film and a preparation method thereof. In order to further improve the adhesion between the base layer of the solar battery backplane film and the protective layer of fluorine material. The invention provides a solar cell backsheet film, the backsheet film includes a water-impermeable resin sheet base layer, and protective layers are arranged on both sides of the base layer, and the protective layer and the base layer are bonded to each other through an adhesive layer. Together; the base layer is a three-layer co-extrusion structure, the middle layer is the main layer, accounting for 80-90% of the thickness of the entire base layer, and the two outer sides are auxiliary layers, each accounting for 5-10% of the thickness of the entire base layer. The base layer of a solar cell backsheet film provided by the invention is more firmly bonded to the protective layer. Since the surface layer (auxiliary layer) of the base layer is a porous structure, compared with the traditional dense structure, it not only has a larger specific surface area, but also is more compact. The adhesive is easy to penetrate, and the preparation method is simple in process and easy to operate.

Description

technical field [0001] The invention relates to the technical field of solar battery backplanes, in particular to a solar battery backplane film and a preparation method thereof. Background technique [0002] A solar cell is a device that converts light energy into electrical energy through the photoelectric effect. Due to the advantages of permanence, cleanliness, and flexibility, it is considered to be a new energy source that will be mainly developed in the future. In the near future, solar photovoltaic cells will replace some conventional energy sources and become the main body of the world's energy supply. [0003] Solar cells are usually a stacked structure, from top to bottom, transparent glass cover / sealing layer ethylene-vinyl acetate copolymer (EVA glue) / cell sheet / EVA glue / back sheet. The entire solar cell is formed by laminating the above-mentioned materials and then sealing the four sides into a frame. The main function of the back sheet is to improve the over...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/049H01L31/18B32B3/24
CPCY02E10/50Y02P70/50
Inventor 不公告发明人
Owner NINGBO CHANGYANG TECH