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Method and equipment for producing solar array back film

A technology of a solar battery pack and a production method, applied in the field of solar cells, can solve the problems of low production efficiency, unstable performance, high labor intensity, etc., and achieve the effect of reducing the length of the workshop, saving energy consumption, and shortening the length of the box body

Inactive Publication Date: 2009-03-04
HAINING BODA SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the formation process of the fluorine-containing coating on the back film of solar cells is basically manual or semi-automatic, which is labor-intensive, low in production efficiency, and the thickness of the coating is uneven, with low adhesion and unstable performance.

Method used

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  • Method and equipment for producing solar array back film
  • Method and equipment for producing solar array back film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] An example of the equipment of the present invention, as shown in Figure 2, includes an unwinding device 1, a pretreatment device 2, a coating device 3, a drying tunnel 4, a finishing device 5, a winding device 6 and a drying device. The unwinding device 1 includes a turning frame type continuous unwinding mechanism and an unwinding traction device; the unwinding shaft set by the unwinding mechanism is a flat key type air expansion shaft; Traction, using magnetic powder brake to control the tension. The pretreatment device 2 includes a static eliminator and a cleaning device. The coating device is a three-roller reverse coating device; the coating thickness is measured and controlled by the comma scraper, the coating speed is controlled by the independent frequency conversion of three motors, and the comma scraper is quickly reset by pneumatics. The length of the drying tunnel is 78m. The drying tunnel is set in the box with the insulation layer. The initial section is...

Embodiment 2

[0037] One example of the method of the present invention is to use the equipment of Example 1 to implement the method of the present invention to produce a single-sided coated solar cell back film. like figure 1 shown, including unwinding, pretreatment, coating, drying, finishing, liner winding and drying steps. First, select tensile strength (N / 10mm) ≥ 110, tear strength (N / mm) 135-145, semi-matt PET film as the base film, place the rolled base film on the unwinding device, and pull The base film is released from the roll; then the base film is electrostatically treated to make its electrostatic induction coefficient ≤0.8, and then cleaned to make the surface of the base film clean and free of impurities; then the imported fluorocarbon paint is stirred evenly and reversed through three rollers The coating device coats the pretreated base film, the coating speed is controlled to be 5m / min, the temperature is 12°C, and the thickness of the coating is controlled by the comma ...

Embodiment 3

[0039]The second example of the method of the present invention is to use the equipment of Example 1 to implement the method of the present invention to produce the back film of a double-sided coated solar cell group. As described in Example 2, through the steps of unwinding, pretreatment, coating, drying, finishing, lining film winding and drying, the single-sided coating was completed. Then separate and rewind the lining film, and process the other side again according to the above process steps, that is, go through the steps of unwinding, pretreatment, coating, drying, finishing, lining film winding and drying again, until the drying is completed again The step is to obtain the finished film. The lining film in the finished film is separated, cut and packaged to obtain the final product.

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Abstract

The invention relates to a method for manufacturing a solar battery back-film and equipment thereof. The method comprises the steps of unreeling, pretreatment, coating, drying, collating, lining film wrap-up and dryness; wherein, the step of drying is completed on a drying tunnel, and a liner does not adhere to a film so as to prevent adhesion. The equipment comprises an unreeling device, a pretreatment device, a coating device, the drying tunnel, a collating device, a wrap-up device and a drying device; wherein, the drying tunnel is arranged to be an initial segment and a following segment which is a reciprocating type so as to shorten the length of a case body and improve the thermal efficiency. The technique achieves automatic manufacture of the solar battery back-film and greatly enhances production efficiency; in addition, the coating has even thickness, high adhesion and good performance.

Description

technical field [0001] The invention belongs to the solar cell technology, and particularly relates to a production process and special production equipment for the back film of a solar cell group. Background technique [0002] Solar energy is an inexhaustible clean energy in nature. In recent years, the utilization of photoelectric conversion of solar energy has made great progress, with continuous technological progress and rapid market expansion. Since the photoelectric conversion efficiency of silicon solar cells is higher than that of other types of solar cells, it has developed rapidly. In particular, solar cell panels composed of the back film of solar cells and polycrystalline silicon solar cells have gradually become the mainstream of the market. [0003] The back film of a solar cell group is a structural packaging material for solar cells. It is used as a substrate for solar cells. It has good electrical insulation properties, anti-ultraviolet and anti-corrosion p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18
CPCY02P70/50
Inventor 周金奎朱洪良姚悦明
Owner HAINING BODA SCI & TECH
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