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Solar battery backplane and solar battery module

A technology for solar cells and back sheets, applied in circuits, electronic equipment, photovoltaic power generation, etc., can solve problems such as molecular weight reduction and mechanical property reduction, and achieve the effects of excellent interface bonding strength, excellent bonding strength, and excellent protection performance.

Active Publication Date: 2018-05-11
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In addition, the molecular weight of general-purpose polyester resin films decreases due to hydrolysis, and the mechanical properties decrease due to the progress of embrittlement, so improvements are being sought, that is, improvements in heat and humidity resistance

Method used

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  • Solar battery backplane and solar battery module
  • Solar battery backplane and solar battery module
  • Solar battery backplane and solar battery module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0212] The PET polymer e shown in Table 1 was used as the raw material for forming the A layer, and the PET polymer k was used as the raw material for the B layer, and they were laminated by a lamination device in such a way that they became the B layer / A layer. The die forms the sheet. The lamination structure is as shown in Table 2. The thickness of the layer A is 50 μm, the thickness of the layer B is 200 μm, and the total thickness is 250 μm. Thickness is controlled by adjustment of extruder discharge. The unstretched sheet that cools and solidifies the sheet-shaped molded product discharged from the T die through the cooling roller with a surface temperature of 25°C is guided to the roller group heated to 85-98°C, and stretched longitudinally 3.3 times along the long side direction, Cooling is performed using a roll set at 21 to 25°C. Next, the longitudinally stretched film was guided to a tenter while clamping both ends of the longitudinally stretched film, and was lat...

Embodiment 2～5

[0215] A base film made of a biaxially stretched polyester film was produced in the same manner as in Example 1, except that the PET polymer raw materials shown in Table 2 were used respectively, and the A layer and the B layer had a predetermined thickness. Then, solar battery back sheets BS2 to BS5 having the laminated structure shown in Table 2 were produced in the same manner as in Example 1.

Embodiment 6

[0217] Using the PET polymer raw materials shown in Table 2, a base film made of a biaxially stretched polyester film was produced in the same manner as in Example 1 so that the A layer and the B layer had a predetermined thickness.

[0218] Next, the C layer-forming raw material composition C5 was applied on the surface of the B layer of the substrate film using a metal wire bar, dried at 180° C. for 60 seconds, and the C layer was provided so that the coating thickness after drying became 0.5 μm. . By aging the sheet thus obtained at 40° C. for 3 days, a solar battery back sheet BS6 having a laminated structure shown in Table 2 was produced.

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Abstract

Provided are a solar cell sealing sheet and a solar cell module using the same, which are excellent in adhesion strength, storage stability, productivity, and environmental resistance of the solar cell sealing sheet and a sealing material. The solar cell back sheet of the present invention has only one base film and a C layer, the C layer is mainly composed of an acrylic resin, the base film has an A layer and a B layer, and the A layer is mainly composed of a polyester resin Component, the A layer contains 5.0% by mass to 25% by mass of the white pigment, the thickness of the A layer is 5 μm or more, and is arranged on the outermost surface of the other side of the back plate, and the B layer is made of polyester resin. The main component is a white pigment of 1.0 mass % or more and less than 5.0 mass % in all components of the B layer, and the thickness of the B layer is 70% or more of the entire back sheet. In addition, as another invention, there is provided a solar cell back sheet in which the C layer is obtained from a composition of an acrylic resin having a reactive functional group, a protected isocyanate compound, and an unprotected isocyanate compound.

Description

technical field [0001] The present invention relates to a solar cell back sheet, which is a solar cell excellent in adhesion to a sealing material and excellent in environmental tolerance, and can withstand use in a long-term severe outdoor environment, and a solar cell module using the same Module parts. Background technique [0002] In recent years, the depletion of fossil fuels including oil and coal has caused concern. The development of energy sources to ensure the replacement of these fossil fuels is urgently needed. Therefore, various methods such as nuclear power generation, hydroelectric power generation, wind power generation, solar power generation, etc. have been studied and put into practical use. [0003] Solar power generation, which can directly convert solar energy into electrical energy, is gradually being put into practical use as a semi-permanent and pollution-free new energy source. The performance improvement relative to the actual use price is surpri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/049B32B27/30B32B27/36
CPCB32B27/36B32B27/08B32B27/20B32B27/308B32B2264/102B32B2307/4026B32B2307/712B32B2457/12Y02E10/50B32B2037/1253B32B2310/0831H01L31/049B32B2255/10H01L31/0481B32B27/26B05D3/0254B32B2255/26H01L31/18
Inventor 荒井崇蓑毛路子佐藤崇网冈孝夫
Owner TORAY IND INC
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