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Solar cell back plane and preparation method thereof

A technology for solar cells and backplanes, applied in chemical instruments and methods, circuits, photovoltaic power generation, etc., can solve problems such as difficulty in reaching the service life, and achieve the effects of low cost, stable backplane structure, and long service life.

Active Publication Date: 2012-07-25
合肥长阳新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even so, the service life of the backsheet using PET as the structural reinforcement layer is theoretically 25 years, but it is found in the PCT aging experiment that it is actually difficult to reach this service life

Method used

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  • Solar cell back plane and preparation method thereof
  • Solar cell back plane and preparation method thereof
  • Solar cell back plane and preparation method thereof

Examples

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preparation example Construction

[0037] The preparation method of the solar battery back plate provided by the invention comprises the following steps:

[0038] (1) Using the extrusion casting method, a biaxially oriented polyester film is produced on a biaxially stretching machine. The temperatures of each section of the extruder are 180°C, 220°C, 275°C, 275°C, 275°C, and 280°C, respectively. The cooling drum speed is controlled at 30r / min, the cooling drum temperature is 60°C, and the temperature difference range is 1°C; the longitudinal stretching temperature is controlled between 90°C-120°C, the stretching ratio is controlled at 3.8-4.0, and the transverse stretching temperature is 120°C-140°C, the stretch ratio is controlled at 3.8-4.0, and the temperature error range is 0.5°C.

[0039] (2) The biaxially stretched polyester film obtained in step (1) is rolled and placed on the coating line for off-line coating. After the adhesive is coated on the upper and lower surfaces of the polyester film, the Heat ...

Embodiment 1

[0050] The solar backsheet was prepared according to the above method, wherein the thickness of the weather-resistant layer was 25 μm, the thickness of the structural reinforcement layer was 150 μm, and the thickness of the adhesive layer was 5 μm. The relevant properties of the obtained backsheet are shown in Table 1.

Embodiment 2

[0052] The solar backsheet was prepared according to the above method, wherein the thickness of the weather-resistant layer was 30 μm, the thickness of the structural reinforcement layer was 200 μm, and the thickness of the adhesive layer was 10 μm. The relevant properties of the obtained backsheet are shown in Table 1.

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Abstract

The invention provides a solar cell back plane and a preparation method of the solar cell back plane, belonging to the technical field of the solar photovoltaic cells. According to the invention, weather resistance of the solar cell back plane can be further improved and service life of the solar cell back plane can be prolonged. The solar cell back plane provided by the invention comprises a weather resistance layer and a structure enhancement layer, the weather resistance layer is made of polyetherimide; the structure enhancement layer is provided with the weather resistance layer on two sides. The solar cell back plane is characterized of simple structure, normal materials, excellent performance, simple technology for preparation method and simple operation.

Description

technical field [0001] The invention relates to the technical field of solar photovoltaic cells, in particular to a solar cell backboard and a preparation method thereof. Background technique [0002] As a green and inexhaustible energy source, solar energy is undoubtedly the best choice to replace traditional thermal power generation. Since solar cells need to be exposed to outdoors for a long time, the cells in photovoltaic modules must be protected to prevent the influence and erosion of environmental factors such as water vapor, oxygen, and ultraviolet rays in the atmosphere. The solar backsheet is one of the accessories of the whole solar cell. It mainly plays the role of mechanical support and protection of the cell from the penetration of environmental factors. Therefore, how to improve the weather resistance of the backsheet has always been the research focus of the industry. [0003] Solar battery backplanes in the prior art mainly include the following types: [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/048B32B27/08B32B7/12H01L31/049
CPCY02E10/50
Inventor 不公告发明人
Owner 合肥长阳新材料科技有限公司
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