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Screen printing screen for preparing battery back electrode pattern and preparation method thereof

A technology of screen printing and electrode graphics, which is applied to screen printing machines, printing machines, printing machines, etc., can solve the problems of increased screen cost and impact on the service life of the screen, and can improve bending along the electrode direction and reduce production costs , Reduce the effect of printing thickness

Inactive Publication Date: 2016-07-06
TIANWEI NEW ENERGY HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technology mainly reduces the consumption of silver paste by increasing the mesh number of the back electrode screen, but while reducing the consumption of silver paste, the cost of the screen will inevitably increase, and at the same time, there will be a greater impact on the service life of the screen. influences

Method used

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  • Screen printing screen for preparing battery back electrode pattern and preparation method thereof
  • Screen printing screen for preparing battery back electrode pattern and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0023] Such as figure 1 shown.

[0024] A new crystalline silicon solar cell back electrode pattern, including an electrode pattern 2 coated on the back 1 of the crystalline silicon solar cell, a shielded hollow area 3 exists in the area of ​​the electrode pattern 2, and an electrode paste layer is coated in the electrode pattern 2. The electrode pattern 2 has 4 rows and 3 columns, and there are 18 shielded hollow areas 3 in each electrode pattern. The picture is only a schematic diagram, and there is no specific number of shielding points. The number needs to be adjusted according to the size of the back electrode pattern. Currently, we are designing a circle with a diameter of 20um.

[0025] The design principle is: use the screen plate, change the graphic design of the screen plate, and set a shielding area on the original graphic, so that the electrode paste cannot penetrate the shielding area, resulting in a hollow area in the printed electrode pattern, that is, the abo...

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PUM

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Abstract

The invention discloses a back electrode pattern of a crystalline silicon solar cell, a screen printing screen and a preparation method thereof. The back electrode pattern of a crystalline silicon solar cell includes an electrode pattern coated on the back of the crystalline silicon solar cell, and there is a shielding hollow in the region of the electrode pattern In the region, the electrode pattern is coated with an electrode paste layer. The back electrode pattern designed in the present invention is partially hollowed out, and through the fluidity of the silver paste, the silver paste completely covers the pattern area of ​​the back electrode of the cell after printing, reducing the printing thickness of the silver paste, reducing the consumption of silver paste, and reducing production costs the goal of.

Description

technical field [0001] The invention relates to an electrode pattern, in particular to a method for preparing a back electrode of a crystalline silicon solar battery that can reduce the amount of electrode paste used. Background technique [0002] With the vigorous development of the solar cell industry, while continuously improving the photoelectric conversion efficiency of the solar cell, higher requirements are placed on the further reduction of the production cost of the solar cell. [0003] Silver paste consumption is an important non-silicon cost of crystalline silicon solar cells. At present, the front and back electrodes of crystalline silicon solar cells are printed with silver paste. Since the front electrode plays a vital role in the photoelectric conversion efficiency of solar cells, Therefore, it has great limitations in reducing the consumption of silver paste, and the consumption of silver paste in the back electrode can be further reduced when the solderabili...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/0224B41F15/36H01L31/18
CPCY02P70/50
Inventor 侯林均徐涛杨东马列刘宗刚姚骞包崇彬
Owner TIANWEI NEW ENERGY HLDG