Solar cell grid line structure, solar cell sheet and solar laminate module

Abstract

The invention provides a solar cell grid line structure, a solar cell sheet and a solar lamination module. The grid line structure comprises a plurality of sub grid lines arranged on a silicon wafer and a main grid line perpendicular to the sub grid lines. The main grid line is formed by a grid-like porous structure. When the main grid line is coated with a conductive paste, grid holes are filledwith a part of the conductive paste. Since the materials of the conductive paste and the main grid line have good electrical conductivity, when the above grid lines are sufficiently dense, the use ofa grid pattern instead of a solid pattern does not seriously affect the electrical performance of a module. The deformation of the conductive paste and the diffusion on a cell shell texture covered bysilicon nitride are limited by the grid pattern of the main grid line and are limited in the grid pattern, and thus paste overflow and bleeding are avoided.

Description

technical field [0001] The invention belongs to the field of solar cells, and in particular relates to a solar cell grid structure, a solar cell and a solar stack assembly. Background technique [0002] A solar cell is a device that uses the photovoltaic effect to directly convert light energy into direct current. According to different photoelectric conversion materials, solar cells include monocrystalline silicon, polycrystalline silicon, amorphous silicon thin films, cadmium telluride thin films, copper indium gallium tin thin films, gallium arsenide, fuel sensitization, perovskite, stacked layers, etc. . The most common of these are crystalline silicon solar cells, including monocrystalline silicon solar cells and polycrystalline silicon solar cells. Solar cells are usually in the shape of a sheet. The side that absorbs light energy and converts it into electricity is called the light-absorbing side or front side, and the other side is called the back side. For some s...

AI Technical Summary

Problems solved by technology

(1) The consumption of silver paste is more, resulting in higher battery cost

(2) For some types of conductive adhesives, there is a risk of overflow or seepage

But this will further increase the consumption of silver paste and battery cost

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