Ink jet device for preparing superfine primary/secondary grid line of solar cell

Abstract

The invention discloses an ink jet device for preparing a superfine primary / secondary grid line of a solar cell. The invention aims to improve the conversion efficiency of the solar cell by reducing the shielding area of an antireflection coating and realizing a high depth-to-width ratio. The ink jet device comprises linear guide rails, and a transverse positioning mechanism and a longitudinal positioning mechanism arranged on each set of linear guide rail; each set of transverse linear guide rail comprises a transverse linear slide rail and a transverse-sliding slide block; each set of longitudinal linear guide rail comprises a longitudinal linear slide rail and a longitudinal-sliding slide block; each longitudinal-sliding slide block is fixedly provided with a guide rail installation seat; the bottom end of each transverse-sliding slide block is provided with a micro-moving positioning platform which consists of a planar micro displacement mechanism and a plurality of piezoelectric ceramics; the bottom end of each planar micro displacement mechanism is fixedly provided with a ink jet printing head array. With the adoption of the ink jet device disclosed by the invention, high positioning accuracy of the ink jet printing head can be met, and the preparation of the orthogonal superfine primary and secondary grid lines can be completed at one step; the ink jet device has the advantages that the mechanism is flexible and adjustable, the operation is reliable, the production efficiency of printing the grid lines can be improved, and the fragment rate of cell pieces can be reduced.

Description

technical field [0001] The invention relates to the field of solar photovoltaic equipment, in particular to an inkjet device for preparing ultra-fine main and auxiliary grid lines of solar cells, which is used for screen printing equipment to prepare ultra-fine main / sub-grid lines of solar cells. Background technique [0002] In recent years, inkjet printing has been widely used in many fields, but it is rarely used in the manufacture of ultra-fine main / sub grid lines for solar cells. The traditional method of preparing main / sub grid lines often adopts contact screen printing process. Due to the limitation of printing paste particle size and printing mesh, the width of fine grid lines after sintering is difficult to be less than 50 μm, and the aspect ratio is difficult to control , and cause slurry waste and a large number of debris, increasing production costs. Contents of the invention [0003] In order to solve the problem that the existing screen printing is limited b...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the existing screen printing is limited by the particle size of the printing paste and the printing mesh, the width of the fine grid line after sintering is difficult to be less than 50 μm, the aspect ratio is difficult to control, and the waste of paste and high fragmentation rate Problem, the present invention aims to provide an inkjet device for preparing ultra-fine main and sub-grid lines of solar cells, which can meet the preparation of main / sub-grid lines with a grid line width less than 40 μm, and can improve photoelectric conversion efficiency and the requirement to reduce the fragmentation rate, laying the foundation for the full automation of the solar cell production line

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