Method for welding crystalline silicon solar cell piece
A technology for solar cells and cells, applied in circuits, electrical components, semiconductor devices, etc., to achieve the effects of extending solder ribbons, avoiding accumulation, and reducing stress
Inactive Publication Date: 2011-07-27
江苏辉伦太阳能科技有限公司
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Problems solved by technology
The accumulation of solder makes this point of the battery sheet bear relatively large stress during the subsequent production process of the module, which is easy to cause cracks in the battery sheet
Method used
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[0015] The present invention will be further described below in conjunction with accompanying drawing:
[0016] Such as Figure 1-3 As shown, the welder places the battery piece 1 to be welded vertically in front of the face, and the thumb, index finger and middle finger of the left hand (when the right hand is welding) push the welding strip 2 and position it on the main grid line 3 to be welded on the battery piece 1, so that the welding The lower end of the strip 2 is located at a distance of about 3-8 mm above the lower edge of the battery sheet 1 . Hold the electric soldering iron in your right hand and start welding from the point A where the soldering strip 2 is about 3-8 mm from the upper edge of the cell 1. The soldering iron moves down along the soldering strip and keeps the soldering strip 2 completely covering the welded main grid line 3. When After the soldering iron moves to the lower end of the ribbon 2, it needs to move down to point B again, and the excess so...
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The invention relates to a method for welding a crystalline silicon solar cell piece. The method is characterized in that a welding operator vertically places a welding strip and a solar cell piece to be welded in the front along a main grid line; the lower end of the welding strip is 3-8 mm away from the lower rim of the solar cell piece; the welding strip is kept thoroughly covering the main grid line to be welded; an electric welding iron begins the welding at a position of the welding strip, which is 3-8 mm away from the upper rim of the solar cell piece; and the electric welding iron moves downwards along the welding strip to reach a blank area at the lower end of the welding strip, which is 3-8 mm away from the lower rim of the solar cell piece. The method achieves the placement by means of 180-degree rotation based on the original welding placement, thereby preventing welding tin from accumulating on an upper electrode welding strip of a solar cell, retaining surplus welding tin on the main grid line of the cell piece in the blank area between a terminal of the upper electrode welding strip and the rim of the cell piece, extending the welding strip and reducing the stress brought by the welding tin accumulation to the cell piece.
Description
technical field [0001] The invention relates to a new method for manually welding welding ribbons on the upper electrodes of crystalline silicon solar cells. Background technique [0002] At present, in the manufacture of solar cell modules, it is first necessary to interconnect the solar cells, so it is necessary to weld a ribbon on the upper electrode of the solar cell, and then weld the soldered ribbon to the lower electrode of another solar cell. At present, there are two methods of manual welding of the upper electrode ribbon: horizontal welding method and longitudinal welding method, but the longitudinal welding method is the main method. [0003] The so-called horizontal welding method means that the ribbon and the solar cell are placed horizontally in front of the welding personnel along the direction of the busbar, and the soldering iron moves laterally during the welding process. Because the horizontal welding method is difficult to control the stability of the w...
Claims
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IPC IPC(8): H01L31/18
CPCY02P70/50
Inventor 孔凡建
Owner 江苏辉伦太阳能科技有限公司