Solar cell, solar cell string and solar cell assembly

Abstract

The invention discloses a solar cell, a solar cell string and a solar cell assembly. The solar cell comprises a substrate, grid lines and front-side electrodes connected with the grid lines are arranged in the front side of the substrate, part, extending to the edge of the substrate, of each-front side electrode is provided with a forking part, at least the forking parts are higher than the substrate, each forking part comprises two branches extending to the edge, and a solder strip through channel is formed between the branches. The forking parts higher than the substrate are arranged, and the solder strip through channel is formed between the two branches of each forking part, so that when the solar cells are interconnected, the solder strips of the adjacent cells are connected and penetrate an overlapped area via the solder strip through channels, thus, vertical spacing, caused by thickness of the solder strips, in the overlapped position of the two solar cells is reduced or eliminated, and the possibility of subfissure or fragmentation is reduced correspondingly.

Description

technical field [0001] The present invention generally relates to the technical field of solar photovoltaic power generation, and in particular to a solar battery sheet, a solar battery string and a solar battery module. Background technique [0002] With the continuous development of the photovoltaic industry, the competition in the industry is becoming more and more fierce. How to improve the output power of modules has become the focus of various enterprises. The continuous emergence of interconnected technologies. The traditional battery interconnection technology is to directly connect the battery slices through welding ribbons. There are gaps between the battery slices in this connection method, which will reduce the effective utilization area. In order to improve the utilization rate of the module area, various new types of module interconnection methods continue to emerge. At present, the main technology types that are widely known include half-cut, shingled, and ti...

AI Technical Summary

Problems solved by technology

[0003] like figure 1 As shown, it shows a shingled connection structure of battery slices, and the intersection of two adjacent battery slices 101, 105 has a certain amount of overlap, and two adjacent battery slices 101, 105 pass through the welding strip 103 For electrical connection, one end of the welding ribbon 103 is connected to the front electrode 102 of the lower battery sheet 101, and the other end of the welding ribbon 103 is connected to the back electrode 104 of the upper battery sheet 105. Due to the existence of the welding ribbon 103, There is a certain distance between the two battery sheets 101 and 105 in the vertical direction, which will cause the problem of cracking or breaking of the battery sheets during lamination.

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