Solar silicon wafer, solar cell, solar cell module and manufacturing method thereof

A technology of solar cells and solar silicon wafers, applied in the field of solar photovoltaic, can solve the problems of incapable of maximizing the use of the component area and reducing the overall efficiency of the components, so as to increase the photoelectric conversion area, improve the photoelectric conversion efficiency, and increase the effective area Effect

Pending Publication Date: 2020-06-26
LONGI SOLAR TECH (TAIZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the regular hexagonal silicon wafer improves the utilization rate of silicon rods, due to the difference in shape between the regular hexagonal solar cell and the rectangular solar cell when the regular hexagonal solar cell is made, the edge of the solar cell will still be Partial blanks are left, therefore, the component area cannot be utilized to the maximum extent, reducing the overall efficiency of the component

Method used

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  • Solar silicon wafer, solar cell, solar cell module and manufacturing method thereof
  • Solar silicon wafer, solar cell, solar cell module and manufacturing method thereof
  • Solar silicon wafer, solar cell, solar cell module and manufacturing method thereof

Examples

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Embodiment 1

[0041] The present disclosure provides a solar silicon wafer, such as figure 1 As shown, the solar silicon wafer is a regular octagon. The diameter of the circumscribed circle of the regular octagon is 150 mm to 300 mm.

[0042] In an example of the present disclosure, the regular octagonal silicon wafer is cut into octagonal pillars along the octagonal axis inscribed in the cross-section of the cylindrical silicon rod, and then sliced. Specifically, crystal silicon rods are made into regular octagonal solar silicon wafers through processes such as crystal growth, square extraction, end face processing, and diamond wire slicing.

[0043] The silicon chip in this disclosure is a regular octagon, and the shape of the silicon chip is close to the cross section of the silicon rod, so that the waste of the silicon rod is greatly reduced, the non-silicon cost at the end of the silicon chip is reduced, and the utilization rate of the silicon rod is improved; The solar cells made of...

Embodiment 2

[0066] According to the technical solution described in Embodiment 1, the present disclosure provides a solar silicon wafer, a solar cell, a solar cell module and a manufacturing method thereof, specifically including:

[0067] 1. Production of silicon wafers: through processes such as crystal growth, squaring, end surface processing and diamond wire slicing, the cylindrical silicon rods are made into silicon wafers with a regular octagonal cross section, and the circumscribed circle of the regular octagonal silicon wafers is directly 150mm , the included angle is 135°, such as figure 1 shown.

[0068] 2. Battery production: Through texturing, diffusion, plasma etching, chemical vapor deposition anti-reflection film, laser opening, screen printing paste and sintering processes, regular octagonal silicon wafers are made into solar cells, and the solar cells are regular octagonal. polygons, such as figure 2 shown.

[0069] 3. Component production: such as Figure 9 As shown...

Embodiment 3

[0072] According to the technical solution described in Embodiment 1, the present disclosure provides a solar silicon wafer, a solar cell, a solar cell module and a manufacturing method thereof, specifically including:

[0073] 1. Production of silicon wafers: through processes such as crystal growth, squaring, end surface processing and diamond wire slicing, the cylindrical silicon rods are made into silicon wafers with a regular octagonal cross-section, and the circumscribed circle of the regular octagonal silicon wafers is directly 210mm , the included angle is 135°, such as figure 1 shown.

[0074] 2. Battery production: Through texturing, diffusion, plasma etching, chemical vapor deposition anti-reflection film, laser opening, screen printing paste and sintering processes, regular octagonal silicon wafers are made into solar cells, and the solar cells are regular octagonal. polygons, such as figure 2 shown.

[0075] 3. Component production: such as Figure 9 As shown...

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Abstract

The invention provides a solar silicon wafer, a solar cell, a solar cell module and a manufacturing method thereof, relates to the technical field of solar photovoltaics, and can improve the utilization rate of a silicon rod, reduce the blank part of the edge of the solar cell module and improve the utilization rate of the module. The specific technical scheme is that a solar silicon wafer is in aregular octagon shape; a regular octagonal solar cell is manufactured by using a regular octagonal silicon wafer; regular octagonal solar cells are cut along a cutting line to obtain cell slices, thecell slices are rectangular or trapezoidal, and the cell slices are classified according to the same shape and are respectively assembled into solar cell modules.

Description

technical field [0001] The present disclosure relates to the field of solar photovoltaic technology, in particular to a solar silicon wafer, a solar cell, a solar cell assembly and a manufacturing method thereof. Background technique [0002] In the manufacturing process of crystalline silicon solar silicon wafers and cells, silicon is first made into cylindrical crystalline silicon rods by Czochralski or zone melting methods. In order to improve the efficiency of solar cell modules, silicon wafers need to cover the entire module as much as possible. Therefore, the crystal silicon rod needs to be made into a rounded square silicon wafer through the process of square extraction and slicing. The outer contour of each silicon wafer is composed of four straight sides and chamfers, commonly known as quasi-square, quasi-square silicon wafers It is directly used to make solar cells, and then made into solar cell modules from solar cells. [0003] At present, the mainstream size of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/04H01L31/18
CPCH01L31/04H01L31/1876H01L31/18Y02E10/50Y02P70/50
Inventor 杨飞王建波戴小俊朱琛吕俊
Owner LONGI SOLAR TECH (TAIZHOU) CO LTD
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