Solar cell module rear panel and manufacturing method thereof

A technology for solar cells and modules, applied in electrical components, chemical instruments and methods, circuits, etc., can solve the problems of increased solvent cost, falsely thin adhesive layer, increased manufacturing cost, etc., and achieve excellent processing and molding performance and Environmental aging resistance, simple and efficient process, and the effect of avoiding pollution

Active Publication Date: 2013-06-19
DSM SUNSHINE SOLAR TECH (SUZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] (1) Use a large amount of solvent to dissolve the adhesive. During the processing, the volatilization of the solvent will pollute the environment, and the recovery of the solvent will also increase the cost
[0009] (2) The thickness of the adhesive layer is relatively thin, less than or around 10 microns, and the adhesive strength and weather resistance are poor
[0010] (3) A separate process is required to coat the solvent-based adhesive on the fluoroplastic film or PET film, and dry to remove the solvent, which increases the manufacturing cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Common extrusion-grade ASA plastic particles are used, and surface-treated titanium dioxide TiO is added to account for 5% of the mass ratio of ASA plastic particles. 2 , ASA film backsheet was prepared by melt extrusion casting, the extrusion temperature was 250°C, and the thickness was 350 microns.

[0070] Composite the back sheet with EVA and glass in a vacuum laminator at 145°C / 10 minutes to prepare a sample.

[0071] The peel strength between the back sheet and the EVA encapsulation layer was tested, and the result was 45N / cm.

[0072] The composite sample of glass / EVA / the back sheet was subjected to a damp heat aging test for 1000 hours, and the result ΔYI was 0.6.

[0073] The above composite sample of glass / EVA / the back sheet was tested for ultraviolet aging for 1000 hours, and the result ΔYI was 0.3.

Embodiment 2

[0075] The ASA film that thickness is 80 microns is made as embodiment 1; Adopt common ethylene terephthalate PET biaxially stretched film, thickness 200 microns; Common linear low density polyethylene LLDPE film, thickness is 50 microns ; Polyurethane solvent-based adhesive, ethyl acetate as the solvent. Through the adhesive compounding process, the polyurethane adhesive is applied to both sides of the PET film in two steps, and then compounded with the ASA film and the LLDPE film respectively to form an ASA / Tie / PET / Tie / LLDPE laminated film backsheet. The thickness of the adhesive is about 10 microns. The ASA film is the outermost film that is in direct contact with the environment.

[0076] The peel strength between ASA and PET in the backsheet was tested, and the result was 7N / cm.

[0077] The backplane, EVA and glass were made into samples through a vacuum lamination process, and the peel strength between the backplane and the EVA encapsulation layer was tested, and the ...

Embodiment 3

[0081] As in Example 1, an ASA film with a thickness of 50 microns was prepared; a common polyamide PA6 biaxially stretched film with a thickness of 180 microns was used; a polyacrylate water-based adhesive. Through the adhesive compounding process, the polyacrylate adhesive is coated on both sides of the PA6 film in two steps, and then compounded with two layers of ASA film respectively to make an ASA / Tie / PA6 / Tie / ASA laminated film backplane , wherein the thickness of the adhesive is about 10 microns.

[0082] The peel strength between ASA and PA6 in the back sheet was tested, and the result was 9N / cm.

[0083] The backplane, EVA and glass were made into samples through a vacuum lamination process, and the peel strength between the backplane and the EVA encapsulation layer was tested, and the result was 45N / cm.

[0084] The composite sample of glass / EVA / the back sheet was subjected to a damp heat aging test for 1000 hours, and the result ΔYI was 0.6.

[0085] The above compos...

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Abstract

The invention provides a solar cell module rear panel which can be in a single-layer structure or a multi-layer structure. At least an outmost film which directly contacts the environment is mainly composed of one or more of acrylonitrile-styrene-acrylate copolymer (ASA), acrylonitrile-ethylene-styrol copolymer (AES) and polymethyl methacrylate (PMMA), or the outmost film is mainly composed of ASA, AES, PMMA, and polycarbonate (PC) or polyamide (PA) or polybutylene terephthalate (PBT) or polyvinyl chloride (PVC). The invention further provides a manufacturing method of the rear panel, namely layers are directly glued to form a rear film or the layers are subjected to coextru-lamination through fusion. The solar cell module rear panel has good machining property and reliable weather resistance property, use of fluorine-containing materials is avoided, cost of a solar cell module is lowered, and the rear panel is environmental-friendly and safe.

Description

technical field [0001] The invention relates to a solar battery module backboard and a manufacturing method thereof. The solar battery backplane has excellent processing performance and reliable weather resistance, avoids the use of fluorine-containing materials, and reduces the cost of the solar battery module. Background technique [0002] Solar energy is one of the most important green renewable energy sources. At present, all countries in the world regard the development of solar power generation as a national energy strategy, and vigorously encourage and promote the development of solar power generation. In recent years, the solar energy industry in all countries in the world has developed rapidly, mainly due to the support of the government and everyone's desire for green and renewable energy. [0003] However, there are still great challenges in solar cell power generation. The main reason is that the cost of solar cell power generation is higher than that of traditi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/18B32B7/12H01L31/048H01L31/049
CPCY02E10/50
Inventor 刘学习
Owner DSM SUNSHINE SOLAR TECH (SUZHOU) CO LTD
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