Grid line printing method of solar cell

A technology of solar cells and printing methods, which is applied in printing, printing devices, etc., can solve problems such as increased costs, increased component welding debris, and scrapped solar cells, and achieves the effects of improving printing quality, improving efficiency, and improving grid line coincidence accuracy

Inactive Publication Date: 2017-06-27
SUZHOU RUNYANG PHOTOVOLTAIC TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the traditional printing process, one kind of paste is used to print the main grid lines and the sub grid lines at the same time. It will not significantly help the electrical performance, but it will increase the unit consumption of the paste and increase the cost. At the same time, the height of the busbar will also increase the welding debris of the module, which will easily lead to the scrapping of the solar cell.
[0004] The second printing can solve the above two problems very well, and the first printing only prints the auxiliary grid lines, and the second printing prints the main grid lines and fine grid lines. However, due to the accuracy of the printing machine, the existing technology can only print The sub-grid line of the second printing is narrower than that of the first printing, and the patent of this invention introduces a method that can improve the accuracy of the second printing

Method used

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  • Grid line printing method of solar cell
  • Grid line printing method of solar cell
  • Grid line printing method of solar cell

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Embodiment Construction

[0020] In order to deepen the understanding of the present invention, the present invention will be further described below in conjunction with the embodiments and accompanying drawings. The embodiments are only used to explain the present invention and do not constitute a limitation to the protection scope of the present invention.

[0021] A grid line printing method for solar cells, characterized in that: comprising the following steps:

[0022] 1) Prepare two screens as follows:

[0023] Screen 1#: The entire graphic has only complete auxiliary grid lines and four calibration points, such as figure 1 shown;

[0024] Screen 2#: The auxiliary grid line perpendicular to the main grid and four calibration electrodes, the four corners of the graphic are second inward, and the third grid line is missing the meaning part, such as figure 2 as shown,

[0025] The two calibration points are complementary, solid circle and ring;

[0026] 2) Use screen 1# to print the solar cell ...

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Abstract

The invention discloses a grid line printing method of a solar cell. Through changing a second-time printed graph, equipment prints a bottom-layer graph and a second-layer graph through regular calibration, and displacement of a rear piece is compensated through the line width difference and offset of grid lines in the printed graphs to increase the overlap ratio of the grid lines, so that the printing quality and efficiency are improved.

Description

technical field [0001] The invention relates to the technical field of solar cell production, in particular to a solar cell grid line printing method. Background technique [0002] In the current photovoltaic industry, due to the mature process of screen printing technology, which is simple and easy to control, it is widely used to form solar panels. However, under the current trend of pursuing high-efficiency and low-cost solar cells, screen printing technology has gradually shown its potential. limitations. The aspect ratio optimization of the sub-grid in the solar cell manufacturing process has been paid more and more attention. The higher the height of the sub-grid of the solar cell, the lower the transmission resistance of the sub-grid; the wider the width of the sub-grid, although it can also be Reducing the transmission resistance of the grid line will also reduce the effective light-receiving area, which will outweigh the gain. On the contrary, thinning the sub-grid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41M1/12B41M1/26
CPCB41M1/12B41M1/26
Inventor 余永健程明郝十峰刘露露武宏伟
Owner SUZHOU RUNYANG PHOTOVOLTAIC TECH
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