Screen printing device for solar batteries

Abstract

The invention discloses a screen printing device for solar batteries. The screen printing device comprises a printing scraper, an auxiliary scraper, a feed back knife and a printing screen. The device is characterized in that two baffle structures are mounted on the printing screen, at two sides close to the ends of the printing scraper, wherein each baffle structure is mainly composed of a baffle surface, a baffle frame and an installation rack; the bottom of the baffle surface is in split type contact with a screen surface, or adhered to the screen surface through a flexible material; edges of the feed back knife, the printing scraper and the auxiliary scraper are in seamless contact with the baffle surface; a printing head drives the scrapers and the feed back knife to contact the baffle surface in a sliding manner, so that the paste moves in a range defined by the baffle surfaces at the two sides, the scraper and the feed back knife, and slurry is prevented from flowing to the two sides; and the device can ensure uniform fluidity, viscosity and thixotropy of the slurry and avoid the local drying and waste of the slurry, thereby improving electrode printing efficiency and printing quality.

Description

technical field [0001] The invention relates to a battery production process in the solar photovoltaic industry, in particular to a screen printing process for a solar crystal silicon battery. Background technique [0002] In recent years, with the shortage of energy and the continuous improvement of people's requirements for their own living environment, renewable energy has been widely concerned. Among them, solar energy, as a clean renewable energy, has become the focus of new energy development. From 2000 to 2010, the global photovoltaic industry developed rapidly, among which crystalline silicon cells have always occupied a dominant position in the market. For the preparation process of crystalline silicon cells, it mainly includes cleaning and texturing, diffusion junction, peripheral etching, anti-reflection coating, electrode production and other processes, among which the production of electrodes is an indispensable process for converting solar energy into electric...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the slurry flows to the non-printing area on both sides of the printing scraper and the return knife during the electrode screen printing process of solar crystalline silicon cells, and to provide a method to prevent the slurry from drying and wasting and ensure printing Quality printing unit construction

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