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Manufacturing method of half-cell piece

A manufacturing method, a half-cell technology, applied in the direction of manufacturing tools, final product manufacturing, sustainable manufacturing/processing, etc., can solve the problems of uneven section of the grid wire, increased power loss, increased fragmentation rate, etc., to achieve capital investment The effect of less, package power loss reduction, and defect reduction

Inactive Publication Date: 2017-09-22
北京捷宸阳光科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many defects in the half-cell slices cut by conventional batteries, such as uneven cross-sections with grid lines, electric leakage, etc. When they are made into modules, the power loss may increase due to the current mismatch due to the number of battery auxiliary grid lines. The right angle stress is large, the fragmentation rate increases, etc.

Method used

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  • Manufacturing method of half-cell piece
  • Manufacturing method of half-cell piece
  • Manufacturing method of half-cell piece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0056] The first step is to select a complete 156mm*156mm P-type polysilicon wafer, and go through wet texturing-phosphorus diffusion-wet etching-removal of PSG-PECVD coating.

[0057]The second step is to use the half-cell battery pattern for screen printing, print the back electrode, dry at 280°C for 5s, print the back electric field, dry at 280°C for 5s, print the positive electrode, the half-cell size is 156mm*78mm, and 4 main grids Lines, the distance between the main grid lines is 39mm, the width of the main grid lines is 1.1mm, eight sections, the total length is 155mm, the width of the auxiliary grid lines is 35μm, 100 lines, the distance between two adjacent thin grid lines is 1.54mm, and sintered at 790°C for 2s.

[0058] The third step is to laser cut the battery sheet along the center line, adjust the laser power to make the cutting thickness reach 2 / 3 of the battery thickness, and then use the laser to cut off the cut right angle, the length of the right angle side...

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Abstract

The invention actively explores the technical process suitable for half-cell piece production through conducting effective design and innovation on the basis of the existing process and utilizing the existing equipment, and discloses a manufacturing method of half-cell pieces. The manufacturing method has the advantages of low fund investment, simple technical process and easy operation, the produced half-cell pieces are more unified and standardized, the mechanical strength and machinability of the half-cell pieces are improved, the defects are reduced, the packaging power loss of the half-cell piece module is reduced, the maximum output power is increased, the rate of finished products is improved, and the manufacturing method is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the field of photovoltaic cell manufacturing, and in particular relates to a method for manufacturing half cells. Background technique [0002] Conventional modules are packaged with batteries of uniform size. Currently, the battery sizes are mostly 156mm*156mm and 156.75mm*156.75mm. There is power loss in the packaged components, part of the power loss comes from electrical loss, that is, P loss =I 2 *R. When using a half-cell package package, the current through the battery is reduced to half of the original, while the internal resistance of the component remains unchanged, and the power loss is reduced to a quarter of the original, that is, the component packaged with a half-cell can increase the maximum Output power, after actual testing, the module power is increased by 1.5%-3%. This improvement is considerable, and how to obtain half-cells has become an important part of improving the power of modules. [0003] At pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18B23K26/364
CPCB23K26/364H01L31/1804H01L31/1876Y02P70/50
Inventor 刘德臣王军赵钊顾艳杰房强
Owner 北京捷宸阳光科技发展有限公司
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