Silicon solar cell and manufacturing method thereof

Abstract

The invention discloses a silicon solar cell and a manufacturing method thereof. The silicon solar cell comprises a plurality of cell slices and a plurality of solder strips. Wherein the battery pieceslices are provided with through holes, the adjacent battery piece slices are connected through welding strips, the welding strips penetrate through the through holes, the two ends of each welding strip are welded to the front faces and the back faces of the two adjacent battery piece slices respectively, namely one end of each welding strip is welded to the front face of one battery piece slice,and the other end of each welding strip is welded to the back face of the other adjacent battery piece slice. According to the battery piece assembly, the distance between the battery piece slices isgreatly reduced, more battery pieces can be placed under the same area, the power of the battery piece assembly is increased, meanwhile, the height difference between every two adjacent battery pieceslices is avoided, and the situation that the welding strip extrudes the edges of the battery pieces under the action of external force, and consequently hidden cracks occur is effectively prevented.

Description

technical field [0001] The invention relates to the field of solar cells, and more specifically relates to a silicon solar cell and a manufacturing method thereof. Background technique [0002] Solar cell power generation is an environmentally friendly power generation method. The power generation process will not produce greenhouse gases such as carbon dioxide and will not pollute the environment. At present, solar cells made of crystalline silicon are the mainstream of the industry. [0003] The existing conventional cell laser cutting method is to vertically cut the cell in half or cut the cell into large and small pieces, and the cut cell is then welded in strings and made into a photovoltaic module. Cells cut by laser cutting in this way must maintain a certain spacing between the slices during the string welding process, so as to prevent the welding ribbon from being bent and cause a height difference between the battery slices, thereby preventing the welding ribbon f...

AI Technical Summary

Problems solved by technology

However, the larger chip spacing makes the number of cells that can be placed in a unit area less, which is not conducive to the improvement of module power

[0004] In addition, when the main grid lines of the cell are opened in the existing processing process, due to the limitation of the process, the thin grid lines around the main grid lines are often disconnected from the main grid lines, resulting in the inability to collect current. The batteries often fail to generate electricity normally, and even cause serious internal consumption of the batteries, resulting in power loss

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