Compound film for solar battery rear board and its making method

A technology for solar cells and composite films, which is applied to circuits, photovoltaic power generation, electrical components, etc., can solve the problems of complex preparation process and high cost, and achieve the effects of simple preparation process, excellent performance, and protection of battery functions.

Inactive Publication Date: 2008-02-13
PERLIGHT SOLAR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the backplane composite film of solar cells usually adopts TPT packaging material, and its preparation process is complicated and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1 Preparation of solar cell backplane composite film

[0034] (1) Polyvinyl fluoride resin is added with 1% dibutyl phthalate, followed by drying, heating, extrusion, forming, longitudinal stretching, transverse stretching, trimming and coiling to obtain polyvinyl fluoride film.

[0035] (2) obtain PET film by salivation processing of the component of following parts by weight:

[0036] 100 parts of PET resin;

[0037] Antioxidant 0.1 part;

[0038] 1 part of hindered amine stabilizer;

[0039] Light stabilizer 0.2 parts.

[0040] (3) Coating a curing agent on the surfaces of the polyvinyl fluoride film and the PET film respectively, placing the PET film between the two polyvinyl fluoride films, bonding and curing by thermocompression to obtain a solar cell backplane composite film.

[0041] The obtained solar cell backboard composite film is composited by the following three layers of materials:

[0042] 0.04mm thick polyvinyl fluoride film;

[0043] 0...

Embodiment 2

[0045] Embodiment 2 Preparation of solar cell backplane composite film

[0046] Change the process parameter in each preparation step of embodiment 1, change the thickness of each film, thus the composite film of the solar cell back plate that makes is compounded by following three layers of materials:

[0047] 0.038mm thick polyvinyl fluoride film;

[0048] 0.30mm thick PET film;

[0049] 0.042mm thick polyvinyl fluoride film.

[0050] The PET film is obtained by salivation processing by adding anti-aging agent to PET resin.

[0051] The composite membranes prepared in Example 1 and Example 2 can be tested as shown in Table 1 below. The composite membranes have excellent mechanical properties and good aging resistance, and their test data are generally better than similar composite membranes.

[0052] Table 1

[0053] Test items

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PUM

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Abstract

The invention relates to a solar battery backplane composite film and the manufacturing method. The solar battery backplane composite film consists of the following three materials: poly fluoride film with a thickness of 0.035mm to 0.045mm; PET film with a thickness of 0.18mm to 0.30mm; poly fluoride film with a thickness of 0.035mm to 0.045mm. The manufacturing method comprises the following steps: the surfaces of the poly fluoride film and the PET film are covered by a firming agent; the PET film is positioned between the two poly fluoride films; and the solar battery backplane composite film is obtained by heat pressing and adhesion and solidifying. The manufacturing technique of the solar battery backplane composite film of the invention is simple and has a good property. The solar battery panel encapsulated after the products prevents effectively the erosion of vapor, oxygen and corrosive gas-liquid, and has the advantages of high and low temperature resistance, anti-aging, and anti-cracking, thus effectively protecting the battery functions and making the solar battery panel output electricity energy for a long time.

Description

(1) Technical field [0001] The invention relates to a composite film of a solar battery back plate and a preparation method thereof. (2) Background technology [0002] Solar cells are directly exposed to the atmosphere (such as the ground, roof, and brackets), and must be eroded by high and low temperatures, steam, and corrosive gases and liquids. If it cannot resist corrosion, its photoelectric conversion performance will be easily attenuated and lose its practical value. Therefore, the research on solar cell packaging materials is very important and has attracted people's attention. In order to achieve the purpose of high and low temperature resistance, water vapor and corrosive gas and liquid resistance, two pieces of EVA film are generally used to encapsulate the solar cell, and bonded with the upper glass and the bottom back plate composite film to form a solar panel . In the prior art, the backplane composite film of the solar cell usually adopts TPT packaging materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0203H01L31/18H01L31/048
CPCY02E10/50
Inventor 周均华
Owner PERLIGHT SOLAR
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