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Solar cell packaging glue

A technology for solar cells and encapsulant, which is applied in the field of solar cells, can solve the problems of increasing the cost of high-reflection backside encapsulant, pushing up the cost of dyeing encapsulant, and high prices of reflective materials, so as to achieve a significant gain in reflectivity and reduce material costs. , The effect of reducing equipment investment

Inactive Publication Date: 2017-04-12
宗慧
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Current research has found that if the reflective material on the back of the cell is greatly improved by adding reflective materials, it can reflect sunlight back to the cell for reabsorption, thereby achieving a certain power gain effect. However, the price of reflective materials is relatively good. High, which increases the cost of highly reflective backside encapsulant, which is not conducive to large-scale promotion
In some applications, the appearance of the solar module’s facing surface needs to match the building or environment, and the encapsulant on the back must be dyed, and the price of the dye is relatively high, which pushes up the cost of the dyed encapsulant

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of solar cell packaging glue The structure is as follows: the layer closer to the cell is a PVB layer containing 10% TiO2, with a thickness of 0.1mm; the middle is a transparent EVA layer, with a thickness of 0.1mm; the layer farther away from the cell is a layer containing 3% TiO2 EVA layer with a thickness of 0.2mm.

[0023] The three film layers are respectively melted and kneaded by different extruders, then extruded, drawn, and then pressed into an integrated structure.

Embodiment 2

[0025] A kind of solar cell packaging glue The structure is as follows: the layer closer to the cell is a white EVA layer containing 12% calcium carbonate, with a thickness of 0.1mm; the layer farther away from the cell is a white EVA layer containing 5% calcium carbonate, with a thickness of 0.1mm 0.3mm.

[0026] The two film layers are respectively melted and kneaded by different extruders, then extruded, drawn, and then compressed into an integrated structure.

Embodiment 3

[0028] A kind of solar cell packaging glue Structure, the layer closer to the cell is a polyolefin layer containing 6% TiO2, with a thickness of 0.1mm; the layer farther away from the cell is a PVB layer containing 8% alumina and 1% barium sulfate, with a thickness of 0.3mm.

[0029] The two film layers are respectively melted and kneaded by different extruders, then extruded, drawn, and then compressed into an integrated structure.

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PUM

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Abstract

The invention relates to a solar cell packaging glue structure, and the structure is characterized in that the structure consists of at least two white layers, wherein the reflectivity of the white layer closer to a battery piece is higher than the reflectivity of the white layer farther from the battery piece; or the structure consists of at least two layers, wherein the layer closer to the battery piece is dyed, and the layer farther from the battery piece is transparent. According to the above two structures, the method and idea of layered dyeing can make the most of requirements of a solar cell for different bonding surfaces of packaging glue, thereby reducing the cost of white packaging glue for white packaging glue, improving the dyeing efficiency for dyeing packaging glue, and reducing the use amount of dye. Meanwhile, the advantages of different filling materials can be used efficiently, and the improvement of overall performance of packaging glue is facilitated.

Description

technical field [0001] The invention belongs to the field of solar cells and relates to an adhesive film, in particular to a dyed solar cell encapsulation adhesive and a preparation method thereof, which are mainly used between solar cell elements and back plate materials or glass. Background technique [0002] Solar energy is a non-polluting green energy that is currently used on a large scale government general attention. Improving photoelectric conversion efficiency and reducing costs are the main technical trends in the development of solar power generation technology, and are also the goals that researchers are chasing. The solar cell itself is relatively fragile and needs to be sealed with an adhesive film, so as to isolate the influence of external moisture and oxygen and improve the service life. Commonly used encapsulation materials are EVA, polyolefin or PVB. Current research has found that if the reflective material on the back of the cell is greatly improved b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/048
CPCY02E10/50H01L31/0481
Inventor 宗慧
Owner 宗慧
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