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Double-sided double-glass assembly for back contact solar cell, and manufacturing method of double-sided double-glass assembly

A technology of solar cells and back contact cells, which is applied in the direction of electrical components, final product manufacturing, sustainable manufacturing/processing, etc., can solve the problems of restricting the application and development of back contact technology, large front shading area, and low component power, and achieve Good anti-PID performance, low cost and high yield

Inactive Publication Date: 2019-05-03
JIANGSU SUNPORT POWER CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, new technologies in the photovoltaic field of solar cells are emerging in an endless stream, and various technologies present different technical advantages. At this time, it is particularly important for different new technologies to overlap each other. Among them, double-sided battery components have unique application advantages. Traditional grid-wire batteries are made of double-sided battery components. It has gradually become the mainstream of the market. Only the back-contact metal winding technology has no main grid on the front and back, so that it is impossible to copy the welding and packaging technology of grid-wire battery components to make double-sided modules, which obviously limits the application and development of back-contact technology. develop
[0003] The mainstream double-sided modules in the existing market are all based on H-type welding packaging technology, using front and rear grid structure cells. This technology has a large front shading area and welding stress, which makes the module power low, prone to cracks, and large attenuation For thin and fragile double-sided batteries, the use of H-type welding technology will inevitably lead to cracks, low yield, and weak reliability.

Method used

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  • Double-sided double-glass assembly for back contact solar cell, and manufacturing method of double-sided double-glass assembly
  • Double-sided double-glass assembly for back contact solar cell, and manufacturing method of double-sided double-glass assembly

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1, the manufacturing method of double-sided double-glass modules of back-contact solar cells, specifically: select a piece of low-iron ultra-clear embossed tempered glass as the first glass layer 1, first place the tempered glass horizontally, and make conductive glass on the tempered glass. circuit, and then print or deposit conductive glue on the corresponding position as the conductive medium point, and then place the first packaging material layer 3——transparent EVA, and the first packaging material layer 3 has through holes corresponding to the conductive medium point one by one. The dielectric point passes through the through hole, and then the back-contact double-sided cells are placed. The cells are arranged in a matrix. glass, forming the middle piece, laminating the middle piece, and finally connecting the conductive core board with the junction box 8 through the glass hole with a soldering tape, and bonding the junction box 8 with silica gel.

[00...

Embodiment 2

[0038] Embodiment 2, the manufacturing method of double-sided double-glass modules of back-contact solar cells, specifically: select a piece of low-iron ultra-clear embossed tempered glass as the first glass layer 1, first place the tempered glass horizontally, and then place the nano-silver wire directly Coated on the tempered glass on the back, and then use laser lithography technology to describe and make a transparent conductive film with nano-level silver wire conductive pattern; print or deposit conductive medium points on the transparent conductive circuit, and the conductive medium point position is the same as that of the back contact type The positive and negative electrode points on the back of the solar cell correspond to each other; then place the encapsulating adhesive film on it. The adhesive film needs to punch several through holes in advance. The number of through holes is the same as the sum of the number of positive and negative electrodes of several batterie...

Embodiment 3

[0040] The same as in Example 1, wherein the nano-silver transparent conductive film is that the nano-silver wire is coated and printed, and the mask plate with the opening pattern is close to the surface of the glass, and then the nano-silver is printed on the glass to form a ribbon. A patterned transparent conductive circuit, the distance between adjacent conductive lines in the patterned transparent conductive circuit is between 2mm, the coating thickness is 20 microns, and then baked at 120 degrees for 5 minutes. The printed pattern formed can realize the back contact battery connection between.

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Abstract

The invention discloses a double-sided double-glass assembly for a back contact solar cell, and a manufacturing method of the double-sided double-glass assembly. The manufactured assembly comprises afirst glass layer, a transparent conductive circuit layer, a first packaging material layer, a back contact cell layer, a second packaging material layer, a second glass layer and a junction box, which are sequentially laminated together from bottom to top. A conductive adhesive medium connecting point layer is arranged on the transparent conductive circuit layer; and the transparent conductive circuit layer is a conductive circuit formed on the first glass layer by a nano-silver conductive material. According to the invention, the double-sided power generation of the back contact battery canbe realized, the back light transmittance is high, and the higher double-sided rate can be realized. Meanwhile, the back contact technology and the double-sided power generation technology are superposed, and the transparent conductive thin film is adopted, so that the double-sided assembly achieves a high double-sided rate, welding stress caused by using a welding strip is avoided, hidden crack of the assembly is reduced, and assembly attenuation is small.

Description

technical field [0001] The invention relates to a double-sided double-glass component of a back-contact solar cell and a manufacturing method thereof, belonging to the technical field of solar photovoltaic cell component manufacturing. Background technique [0002] At present, new technologies in the photovoltaic field of solar cells are emerging in an endless stream, and various technologies present different technical advantages. At this time, it is particularly important for different new technologies to overlap each other. Among them, double-sided battery components have unique application advantages. Traditional grid-wire batteries are made of double-sided battery components. It has gradually become the mainstream of the market. Only the back-contact metal winding technology has no main grid on the front and back, so that it is impossible to copy the welding and packaging technology of grid-wire battery components to make double-sided modules, which obviously limits the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/048H01L31/0224H01L31/18
CPCY02E10/50Y02P70/50
Inventor 张彩霞吴仕梁路忠林张凤鸣
Owner JIANGSU SUNPORT POWER CORP LTD
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