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Large-size solar cell structure packaging assembly

A solar cell and packaging module technology, applied in the field of solar cells, can solve problems such as photoelectric conversion efficiency reduction, module power reduction, cutting edge damage, etc., and achieve the effects of reducing ribbon resistance, module power improvement, and cost reduction

Pending Publication Date: 2021-02-05
周承华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this structure is that the cutting edge is damaged after the cell is cut, the 156.75 mm side length cell made of 6inch wafer is cut into 2 small cells, and the 210 mm side length cell made of 12inch and 6inch wafer is generally cut For 2 small cells, the more cuts, the more damage, resulting in a greater reduction in module power
Structural disadvantages: battery cutting causes cutting edge damage, and the power reduction of components caused by cutting damage cannot be avoided
The present invention aims to solve the problem of photoelectric conversion efficiency reduction caused by the cell cutting process when the module is packaged

Method used

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  • Large-size solar cell structure packaging assembly
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Examples

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Embodiment 1

[0021] like figure 1 As shown, this embodiment provides a battery chip interconnection packaging assembly with a side length of 156.75 mm in large size. Each battery assembly includes at least packaging glass 1, packaging film 2, thickened solder ribbon 3 and battery sheet 5 from top to bottom. Each battery sheet contains five main grid lines 4, and the packaging glass 1 is provided with a set of trapezoidal grooves 101 in parallel along the length direction of the main grid lines 4. The positions of the main grid lines and the trapezoidal grooves correspond one by one. The thickened solder ribbon 3 is embedded in the trapezoidal groove 101 of the packaging glass 1 and has a gap with the surrounding inner wall of the trapezoidal groove.

[0022] In this embodiment, when the cells are interconnected, the width of the ribbon is 0.77 mm, the thickness of the ribbon is 1.2 mm, the glass groove is trapezoidal, the depth is 1.4 mm, the bottom width of the groove is 2 mm, and the sur...

Embodiment 2

[0025] like figure 2 As shown: this embodiment is illustrated by taking the interconnection assembly of 210 mm side length battery slices as an example. The composition of the basic components is similar to that of the embodiment. The difference between the welding ribbon 3 and the battery sheet 5 is that eight busbars 4 are respectively arranged on the battery sheet 5 in this embodiment, and when the battery sheets are interconnected, the width of the welding ribbon is increased by 0.6 mm and the thickness is 1 mm.

[0026] The groove 101 of the encapsulating glass 1 in this embodiment is rectangular, the length of the rectangle is 2 mm, and the width is 1.2 mm. The components interconnected in this way do not increase the cost of solder ribbon materials. Module power increased by at least 3%.

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Abstract

The invention discloses a large-size solar cell structure packaging assembly which at least sequentially comprises packaging glass, a packaging adhesive film and a plurality of battery pieces interconnected through welding strips from top to bottom, a set of main grid lines are arranged on each battery piece in parallel, and a set of grooves are formed in the packaging glass in parallel in the length direction of the main grid lines. The positions of the main grid lines correspond to the positions of the grooves in a one-to-one mode, the tops of the welding strips on the main grid lines are embedded into the grooves of the packaging glass, gaps are formed between the tops of the welding strips and the inner walls of the peripheries of the grooves, and the longitudinal height of the weldingstrips ranges from 0.5 mm to 2.5 mm.

Description

technical field [0001] The invention relates to a large-scale solar cell structure encapsulation assembly, which belongs to the technical field of solar cells. Background technique [0002] In the packaging process of existing crystalline silicon cells, solder ribbons are used for interconnection, and then covered with packaging film and then covered with glass and laminated. The optical loss and electrical loss caused by encapsulation make the photoelectric conversion efficiency of the packaged component lower than that of a monolithic cell. Before packaging crystalline silicon cells into components, they are usually cut into small pieces. A cell with a side length of 157.75 cm is cut into 2 small pieces to reduce the current of a single cell, thereby reducing the loss of interconnection resistance. However, the cells are formed through a complete process and sliced ​​into small cells The recombination of edge damage is inevitable, which will reduce the module power; in ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/05H01L31/048
CPCH01L31/0508H01L31/048Y02E10/50
Inventor 周承华
Owner 周承华
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