A constant-angle printing method and device for grid lines of solar cells

Abstract

The invention discloses a solar cell grid line constant-angle printing method. When a printing scraping knife acts on a silk screen to print a grid line to a solar cell, the position of a printing platform bearing the solar cell is adjusted in real time so that the included angle between the silk screen and the printing platform can be constant. The invention further discloses a solar cell grid line constant-angle printing device. The solar cell grid line constant-angle printing device comprises the printing scraping knife, the silk screen and the printing platform bearing the solar cell. The silk screen is located between the printing scraping knife and the printing platform. A multi-dimensional movement assembly is further included. The printing platform is connected with the multi-dimensional movement assembly and driven by the multi-dimensional movement assembly to carry out position adjustment so as to guarantee that the included angle alpha between the silk screen and the printing platform is constant during grid line printing. The printing method and printing device have the beneficial effects that operation is easy and convenient, the printing angle is constant, printing quality consistency is good, and printing quality is high.

Description

technical field [0001] The invention mainly relates to the technical field of photovoltaic new energy, in particular to a constant-angle printing method and device for grid lines of solar cells. Background technique [0002] Screen printing technology is an important process step in the manufacturing process of crystalline silicon solar cells. It is used to print conductive grid lines on the surface of crystalline silicon cells that have formed a pn junction. The quality of grid line printing is mainly reflected in the high consistency of grid lines and the grid line. The volatility of line width. The cross-sectional area of ​​the grid line is the smallest at the lowest point of the line height of the grid line, and the resistance is the largest. This point will become the bottleneck of the conductivity of the entire grid line. However, the over-printing of the paste at the bump reduces the active power utilization of the paste and increases the production cost, but does no...

AI Technical Summary

Problems solved by technology

The detachment speed of the paste is not only directly related to the printing quality of the grid line, but the low detachment speed will also increase the probability of the cell sticking under the screen, which will directly lead to the scrapping of the cell and the waste of a large amount of paste, and cause shutdown processing production loss

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