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Solar cell electrode paste printing device and electrode preparation system

A technology for solar cells and electrode pastes, which is applied in printing, circuits, typewriters, etc., and can solve the problems of solar cell performance degradation and waste of raw materials

Active Publication Date: 2020-12-08
GCL SYST INTEGRATION TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the groove lines formed by laser etching are usually thin, and secondary positioning is required during subsequent inkjet printing, and it is difficult to ensure that the inkjet printed electrode paste is accurately driven into the groove lines formed by laser etching. In order to prevent the slurry from entering the groove line, it is necessary to print a large amount of electrode paste near the groove line. Excessive electrode paste will not only cause waste of raw materials, but even cause performance degradation of solar cells

Method used

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  • Solar cell electrode paste printing device and electrode preparation system
  • Solar cell electrode paste printing device and electrode preparation system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The preparation steps of a solar cell electrode are as follows:

[0050] Take the P-type silicon wafer containing various functional layers and put it on the conveyor belt, and then transfer it to the workbench through the conveyor belt. After that, the CCD light source positioning system collects the area to be etched on the silicon wafer, and the coaxial XYZ controller acquires the area to be etched on the silicon wafer. After the position data of the etching area is obtained, the movement of the gun body mounting frame is adjusted to realize the alignment between the laser etching gun and the area to be etched of the P-type silicon wafer.

[0051] Then move the laser etching gun to etch groove lines on the area to be etched on the P-type silicon wafer. The parameters of the laser etching are set as follows: the laser wavelength is 532nm, and the spot diameter of the laser mold opening is adjusted to 20μm. With the movement of the laser etching gun, the inkjet gun mov...

Embodiment 2

[0054] The preparation steps of a solar cell electrode are as follows:

[0055] Take the P-type silicon wafer containing various functional layers and put it on the conveyor belt, and then transfer it to the workbench through the conveyor belt. After that, the CCD light source positioning system collects the area to be etched on the silicon wafer, and the coaxial XYZ controller acquires the area to be etched on the silicon wafer. After the position data of the etching area is obtained, the movement of the gun body mounting frame is adjusted to achieve alignment between the laser etching gun and the area to be etched on the P-type silicon wafer.

[0056] Then move the laser etching gun to etch groove lines on the area to be etched on the P-type silicon wafer. The parameters of the laser etching are set as follows: the laser wavelength is 532nm, and the spot diameter of the laser mold opening is adjusted to 200μm. With the movement of the laser etching gun, the ink jet of the in...

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Abstract

The invention relates to a printing device and electrode preparation system of solar cell electrode slurry. The printing device of the solar cell electrode slurry comprises a main body support, an etching mechanism and an ink spraying mechanism. The etching mechanism comprises an etching mechanism body installed on the main body support and an etching gun connected with the etching mechanism body,one end of the etching gun is provided with an etching gun nozzle, and the etching gun is used for etching a silicon wafer to form a groove line on the surface of the silicon wafer; the ink jetting mechanism comprises a material storage tank used for storing electrode slurry and an ink spraying gun communicates with the material storage tank, the material storage tank is arranged on the the mainbody support, one end of the ink spraying gun is provided with an ink spraying gun nozzle; the ink spraying gun is used for printing the electrode slurry in the material storage tank to the groove line etched by the etching gun on the silicon wafer, the ink spraying gun nozzle of the ink spraying gun is close to the etching gun nozzle of the etching gun, and the ink spraying gun nozzle is flush with the etching gun nozzle. By adopting the printing device, the electrode slurry can be accurately and quickly pumped into the groove line of a etching groove.

Description

technical field [0001] The invention relates to the field of solar cell electrode processing, in particular to a printing device for solar cell electrode paste and an electrode preparation system. Background technique [0002] Solar cells are devices that directly convert light energy into electrical energy through the photoelectric effect or photochemical effect. Because they mainly use clean and environmentally friendly sunlight as energy, solar cells have broad application prospects. [0003] The fabrication of solar cell electrodes is an important part of the solar cell production process. Among them, solar cell electrodes are usually made by laser etching and slotting, inkjet printing of electrode paste, and then drying and sintering. However, the groove lines formed by laser etching are usually thin, and secondary positioning is required during subsequent inkjet printing, and it is difficult to ensure that the inkjet printed electrode paste is accurately driven into t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41J2/01B41J3/407H01L31/18
CPCB41J2/01B41J3/407H01L31/18Y02P70/50
Inventor 张子森王伟董建文吕加先沈贞东叶权华魏文文盛健张淳
Owner GCL SYST INTEGRATION TECH