Electrode pattern of a solar cell sheet

Abstract

The present invention provides a pattern design of solar cell electrodes, the square structure includes first diagonal lines and second diagonal lines perpendicular to each other; the front electrode structure includes an even number of front busbars, and every two front busbars form a pair. The two front main grids in each pair are respectively located on both sides of the first diagonal and intersect vertically; the front main grids are respectively perpendicular or parallel to the sides of the square structure; when there are multiple pairs of front main grids, they are located in the first pair Multiple front main grids on the same side of the diagonal line are arranged in parallel; the back electrode structure is similar to the positive electrode structure; the intersection position of each pair of front main grids and the first diagonal line is the same as the intersection point of each pair of back main grids and the first diagonal line The positions are coincident; the front main grid and the rear main grid on the same side of the first diagonal line are vertically arranged. Correspondingly, the present invention also provides a solar battery sheet, a triangular solar battery sheet and a solar battery module adopting the above-mentioned electrode pattern design. By adopting the technical solution provided by the invention, the manufacturing cost of the solar battery module can be effectively reduced.

Description

technical field [0001] The invention relates to the field of solar cells and components, in particular to an electrode pattern of a solar cell sheet. Background technique [0002] Please refer to FIG. 1( a ). FIG. 1( a ) is a schematic structural diagram of a front electrode of a solar cell in the prior art. As shown in Figure 1(a), the front electrode structure of a solar cell in the prior art includes a main grid structure 2 and a sub-grid structure 3, wherein the main grid structure 2 and the sub-grid structure 3 are located in a rectangular solar cell 1 (usually a silicon wafer) on the front surface (that is, the light-incoming surface). Further, as shown in FIG. 1( a ), the busbar structure 2 usually includes a plurality of busbar lines. Wherein, the plurality of main grid lines are parallel to the edge of the solar battery sheet 1 , and the sub-grid structure 3 includes a plurality of thinner sub-grid lines, wherein the sub-grid lines are perpendicular to the main gr...

AI Technical Summary

Problems solved by technology

In addition, the internal resistance of general monocrystalline silicon solar cells or amorphous silicon solar cells is relatively large, and multiple pieces need to be used in parallel to reduce internal resistance, but parallel connection will cause the increase of dark current on the surface of solar cells and reduce the efficiency of solar cells. Therefore, , the solar cells after cutting can be connected in series and parallel to achieve the effect of reducing the internal resistance of the solar cells and reducing the dark current on the surface of the solar cells

[0005] However, in the connection process of solar cell components, the structure of the solar cell itself and the arrangement of multiple solar cells will directly affect the photoelectric conversion efficiency and manufacturing cost of the solar cell component.

A large number of bus bars will be used in the connection process after traditional solar cells are cut, resulting in high manufacturing costs of solar cell modules; in addition, the use of multiple bus bars will also increase the possibility of problems in the connection process; The use of such auxiliary materials will further increase the internal friction of solar cell components, thereby reducing the photoelectric conversion efficiency of solar cell components

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