A method for manufacturing a silicon wafer, a cell, and a photovoltaic module

Abstract

The invention discloses a method for manufacturing a silicon wafer, a cell, and a photovoltaic module, and relates to the field of photovoltaic technology, so that the photovoltaic module produced by the silicon wafer manufacturing method can be closely arranged, and at the same time, it can improve the efficiency of circular silicon wafers in the process of manufacturing silicon wafers. Great utilization, lower costs. The manufacturing method of the silicon wafer comprises: providing a circular silicon rod; cutting the circular silicon rod along a quadrilateral preset cutting path to obtain a quadrilateral silicon rod. The quadrilateral preset cutting path includes a first group of diagonal corners and a second group of diagonal corners, wherein the first group of diagonal corners inscribes the cross section of the circular silicon rod, and the second group of diagonal corners is located in the cross section of the circular silicon rod outside. The quadrilateral silicon rod is sliced ​​to obtain a quadrilateral silicon chip with two opposite cambered corners. The manufacturing method of the silicon chip, the battery sheet and the photovoltaic module provided by the invention are used in the manufacture of the photovoltaic module.

Description

technical field [0001] The invention relates to the technical field of photovoltaics, in particular to a method for manufacturing a silicon wafer, a solar cell, and a photovoltaic module. Background technique [0002] At present, when preparing silicon photovoltaic cells, it is usually necessary to cut the round silicon rods prepared by the Czochralski method into square silicon rods. In the prior art, in order to improve the utilization rate of the round silicon rods, some manufacturers adopt a cutting method with chamfers, and the prepared cells have four chamfers. Although this cutting method has a high utilization rate for round silicon rods, the cells with four chamfers cannot be densely packed in the photovoltaic module, which limits the increase in the power of the photovoltaic module. Some manufacturers, in order to realize the dense arrangement of cells in the photovoltaic module, cut and slice the round silicon rods to form full square silicon chips (without chamf...

AI Technical Summary

Problems solved by technology

Although cells made of such full square silicon wafers can be densely arranged in photovoltaic modules, the utilization rate of round silicon rods is low when making full square silicon wafers, which increases the manufacturing cost of photovoltaic modules.

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