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Solar cell rear panel, preparation method thereof and solar cell module using rear panel

A solar cell and backplane technology, which is applied in electrical components, chemical instruments and methods, circuits, etc., can solve the problems of solar cells such as weather resistance, ultraviolet resistance, insulation degradation, insufficient bonding strength, and affecting the life of solar cells. Achieve excellent dimensional stability and not easy to peel off

Active Publication Date: 2010-12-29
BYD CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] However, due to the generally low surface energy of fluorine-containing polymers, the adhesive layer thermocompression bonding process between polyvinyl fluoride and polyethylene terephthalate has strict requirements on the formulation of polymer adhesives, which is likely to cause gaps between film layers. The bonding strength between the layers is not enough, and it is easy to cause bubbles to remain between the layers. In the long-term application, the gas, salt spray, and some pollutants will penetrate and erode along the edge of the film to the middle, resulting in the film layer due to The aging of the polymer adhesive layer leads to peeling between the layers, resulting in the decline of the solar cell's weather resistance, ultraviolet resistance and insulation, thus affecting the life of the solar cell

Method used

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  • Solar cell rear panel, preparation method thereof and solar cell module using rear panel
  • Solar cell rear panel, preparation method thereof and solar cell module using rear panel
  • Solar cell rear panel, preparation method thereof and solar cell module using rear panel

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preparation example Construction

[0022] The present invention provides a method for preparing the above-mentioned solar cell backsheet, the method comprising:

[0023] (1) Substrates are carried out sequentially, static removal treatment, surface plasma treatment or surface corona treatment to obtain a surface-treated substrate;

[0024] (2) Weigh fluorocarbon resin, solvent, fluorosiloxane, crosslinking agent, filler (obtained by trifluoropropylmethylcyclotrisiloxane (D3F) polymerization, raw material from Dowcorning Dow Corning) in proportion , Dissolving fluorocarbon resin and fluorosilicone in solvent, then adding crosslinking agent and filler to form mixed emulsion;

[0025] (3) directly coating the mixed emulsion obtained in step (2) on at least one side of the surface-treated substrate obtained in step (1), under heating conditions, a crosslinking and curing reaction occurs to obtain a solar cell backplane.

[0026] The substrate material mentioned in the present invention is selected from one of pol...

Embodiment 1

[0037] This embodiment is used to illustrate the solar battery back sheet provided by the present invention and its preparation method.

[0038] Put the polyethylene terephthalate substrate with a thickness of 250 microns into a corona machine (Techmach company) to carry out double-sided surface treatment, and the corona treatment intensity is 80watt / m 2 / min, the surface energy of the film before treatment is 30dyn / cm, and the surface energy after treatment is 55dyn / cm.

[0039] Take by weighing 25g of polyvinyl fluoride, 10g of fluorosilicone, 6g of polyisocyanate, 40g of propylene glycol methyl ether, and 15g of titanium dioxide, first polyvinyl fluoride and fluorosiloxane are dissolved in propylene glycol methyl ether, Stir at a speed of 150 rpm, stir for 30 minutes, add polyisocyanate and titanium dioxide, mix and stir, the stirring speed is 100 rpm, and the stirring time is 20 minutes to obtain a mixed emulsion;

[0040] Use a self-made coater for the mixed emulsion, an...

Embodiment 2

[0042] The PET base film with a thickness of 250 microns is treated on both sides with a special corona treatment equipment, and the corona treatment intensity is 90watt / m 2 / min, the surface energy of the film before treatment is 30dyn / cm, and the surface energy after treatment is 60dyn / cm.

[0043] Weigh 30g of polyvinylidene fluoride (PVDF), 8g of fluorosiloxane,? 5 g of polyisocyanate, 50 g of dimethylacetamide, 8 g of titanium dioxide. First dissolve polyvinylidene fluoride and fluorosiloxane in dimethylacetamide, stir at a speed of 100 rpm, stir for 30 minutes, add polyisocyanate and titanium dioxide, mix and stir, and stir at a speed of 80 rpm , the stirring time is 30min, and the mixed emulsion is obtained;

[0044] Use a self-made applicator for the mixed emulsion, and the coating method can be coated on one side of a polyethylene terephthalate substrate with a size of 40mm×30mm×20um, and the coating thickness is 100um. The substrate covered with the mixed emulsion...

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Abstract

The invention provides a solar cell rear panel, a preparation method thereof and a solar cell module using the rear panel, wherein the solar cell rear panel comprises base material and a weatherproof layer and is characterized in that at least one side of the base material is covered with the weatherproof layer, and the weatherproof layer comprises the following components based on the total weight of the weatherproof layer: 10-20wt% of Fluoride organopolysiloxane, 20-30wt% of fluorocarbon resin, 2-6% of cross-linking agent and 15-40wt% of inorganic filler. The solar cell rear panel provided by the invention has the characteristics of good bonding force between the base materials and the weatherproof layer, and high size stability.

Description

technical field [0001] The invention relates to a solar battery backboard, a preparation method thereof and a solar battery module using the backboard. Background technique [0002] A solar cell is a device that directly converts light energy into electrical energy through the photoelectric effect. It is a promising new power supply with three advantages of permanence, cleanliness and flexibility, and its market prospect is broad. Solar photovoltaic power generation will occupy an important seat in the world's energy consumption in the near future, not only to replace some conventional energy sources, but also to become the main body of the world's energy supply. [0003] A solar panel is usually a laminated structure, mainly including a glass surface layer, a solar cell, an ethylene-vinyl acetate sealing layer and a solar cell backsheet, wherein the solar cell is sealed and wrapped by two layers of ethylene-vinyl acetate copolymer sealing layer. The main function of the s...

Claims

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Application Information

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IPC IPC(8): H01L31/0203H01L31/18H01L31/048C07F7/18C09D127/12C09D183/08C09D5/00H01L31/049
CPCY02E10/50
Inventor 饶先花杨卫国
Owner BYD CO LTD
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