Solar battery main grid mask plate

Abstract

A solar battery main grid mask plate is composed of bolts (200), a base plate (201), a cover plate (202) and mask strips (203). The solar battery main grid mask plate is horizontally arranged. The base plate (201) is arranged at the lower portion. The cover plate (202) is arranged on the base plate (201). The mask strips (203) are arranged inside the middle area on the cover plate (202). The number of the mask strips (203) is equal to that of main grids needed when a solar battery forms a mask. Base plate latch holes and cover plate latch holes are symmetrically distributed in the sides of the base plate (201) and the cover plate (202) in the same direction. The bolts (200) are adopted for fixing the base plate and the cover plate through the base plate latch holes and the cover plate latch holes, so that the solar battery main grid mask plate forms a hinge structure capable of being opened and closed freely.

Description

technical field [0001] The invention relates to a device for preparing a solar cell, in particular to a main grid mask for realizing a mask for the main grid region. Background technique [0002] If a silicon oxide organic solution is deposited by spraying on the front surface of a conventional solar cell, and after annealing, it is decomposed to form a silicon oxide film, so that the front surface has a "silicon oxide / silicon nitride" double anti-reflection film structure, which can not only improve the conversion efficiency, Moreover, it is possible to prepare a solar cell with resistance to PID effect (potential induced degradation). However, this treatment method will cause the main grid of the solar cell to be covered by silicon oxide and cannot be welded, which will become an obstacle to the preparation of components. Therefore, a mask is required to avoid deposition of silicon oxide in the main gate region. [0003] At present, the ways to realize the busbar mask of...

AI Technical Summary

Problems solved by technology

Although this improved screen mask can effectively reduce deformation and increase mask tension, the cost of laser burning or mechanical cutting is high, and the edges of the processed mask are rough and jagged, and the graphics The area near the edge becomes rough or has particles that are not easy to clean due to laser burning or instrument grinding, which not only fails to achieve a good masking effect, but also causes solar cell debris, which increases manufacturing costs

[0006] In addition, the screen mask also has the following disadvantages: (1) The thickness of the film layer prepared by the screen mask is too large, which will easily cause the film layer to absorb the incident light, inhibit the improvement of the conversion efficiency of the solar cell, and even reduce the Solar cell conversion efficiency

(2) The screen mask requires that the sediment to be deposited has a higher viscosity. If the sediment to be deposited is a solution prepared by water or an organic solvent (such as alcohol, isopropanol), since the solution has a strong fluidity, The deposited solution will flow towards the busbar area and flood the busbar, and the masking effect cannot be achieved

Images