Printing deviation measuring method, printing method and printing device for solar cell plate

A solar cell sheet and printing method technology, applied in printing devices, measuring devices, optical devices, etc., can solve the problems that rotary table printing cannot meet the printing accuracy of solar cell electrodes, achieve rapid position adjustment, improve accuracy, reduce The effect of vibration

Active Publication Date: 2011-04-06
SUZHOU MAXWELL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the problem that the rotary table printing in the prior art cannot meet the precision required for solar cell el

Method used

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  • Printing deviation measuring method, printing method and printing device for solar cell plate
  • Printing deviation measuring method, printing method and printing device for solar cell plate
  • Printing deviation measuring method, printing method and printing device for solar cell plate

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0044] Example 1

[0045] Such as Figure 1-3 As shown, the rotating workbench 1 of the device for printing electrodes of solar cells in this embodiment is as figure 1 As shown (power mechanism, control system, etc. are not shown in the figure), there are 4 stations 2 evenly distributed on the rotating worktable 1, followed by waiting station 11, printing station 12, filming station 13, and Waste film station 14. At the same time, circular identification marks 15 are set on the outer edge sides of the rotating worktables corresponding to the four workstations. Of course, the identification mark 15 can also be any shape that is convenient for the CCD camera 4 to identify, such as a square. A CCD camera 4 is set near the outer edge side of the rotating worktable 1 and at the same height as each circular identification mark 15 to photograph the identification mark 15 and obtain the actual position data of each station, and transmit the data to the control system. Measure the posi...

Example Embodiment

[0049] Example 2

[0050] The printing method of the solar cell sheet used for the rotating workbench in this embodiment adopts the printing device as described in the first embodiment. Such as Figure 4 Shown is the flow chart of the solar cell sheet from the primary printing of the silver grid line to the secondary overprinting of the silver grid line. First, when the solar cell is transported to the waiting station 11, the CCD camera 4 determines the actual position P1' of the solar cell in the waiting station 11, and at the same time, the CCD camera 4 measures the actual position M′ of the waiting station 11 And send the measured data to the control system; then, the control system calculates the position deviation △P1 of the solar cell according to the preset position P1 of the waiting station 11 and the actual position P1'; then, the solar cell rotates The rotation of the worktable 1 is transmitted to the printing station 12, the actual position N′ of the printing station ...

Example Embodiment

[0054] Example 3

[0055] The method for measuring the deviation of solar cell printing in this embodiment includes: firstly using a vacuum suction device to adsorb and position the solar cell through a plurality of micropores opened in the waiting position, and then use a vacuum suction device located near the waiting station 11 The CCD camera captures the actual position P1′ of the solar cell and the actual position P1′′ of the waiting station, and transmits the position information to the control system; the control system is based on the preset position P1 and the position of the solar cell stored in it. The actual position P1' calculates the position deviation △P1 of the solar cell; then, after the rotating worktable 1 is rotated 90 degrees, the CCD camera 4 arranged near the outer periphery of the rotating worktable 1 determines that the waiting station 11 moves to The actual position P2′ behind the printing station 12, and the position information is transmitted to the con...

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Abstract

The invention relates to a printing deviation measuring method, a printing method and a printing device for a solar cell plate. The deviation measuring method comprises the following steps of: A. measuring the actual position P1' of the solar cell plate at a waiting station after plate feeding, and calculating the position deviation delta P1 of the solar cell plate according to a preset position P1 of the solar cell plate; B. measuring the actual position M' of one station of a rotating work table at the waiting station and the actual position N' of the rotating work table after the rotating work table rotates to a printing station, and calculating the position deviation delta M and delta N of the station respectively on the waiting station and the printing station by combining the actual positions M' and N' with the preset position M of the waiting station and the preset position N of the printing station; and C. calculating the integrated position deviation delta P of the solar cell plate according to the position deviations delta P1, delta M and delta N in the step A and the step B. The invention regulates the position of a printing screen of the printing device according to the integrated position deviation delta P so that the positions of the printing screen and the solar cell plate are sufficiently coincided, thereby outstandingly enhancing the accuracy of final printing.

Description

[0001] technical field [0002] The invention relates to the manufacture of solar cells, in particular to a device for printing monocrystalline silicon and polycrystalline silicon solar cell electrodes on a rotary table and a printing method thereof. [0003] Background technique [0004] In order to improve the conversion efficiency of solar cells and reduce the contact resistance of the front electrode, a method of double-overprinting the front electrode has become popular in the industry. The two overprints increase the thickness of the front electrode without increasing the width of the electrode, which increases the efficiency of the cell by about 0.5%. The technical difficulty is that dozens of silver grid lines with a width of about 100 microns will be printed Twice, the offset between the two printings is preferably less than 1 micron, which poses a great challenge to the previous printing offset (generally acceptable within 50 microns) scheme and equipment. [000...

Claims

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Application Information

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IPC IPC(8): B41M1/12B41F15/08B41F33/00G01B11/00
Inventor 周剑施政辉李龙强
Owner SUZHOU MAXWELL TECH CO LTD
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