Flux spraying method and device for solar photovoltaic modules
A solar photovoltaic and spraying device technology, applied in the field of solar photovoltaics, can solve the problems that affect the welding quality, the smooth progress of battery sheet welding, the interconnection strip sticking to the welding platform or welding pressure pin, the formation of crystals, impurities, etc., to ensure spraying Process requirements, saving dosage, and avoiding crystallization effect
Inactive Publication Date: 2013-04-24
CHINA SUNERGY CO LTD
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Problems solved by technology
The defect of the first coating method is: due to the excessive flux coating on the surface of the interconnection strip, the flux is coated on the surface other than the welding surface. During the welding process, too much flux is easy to form crystal adhesion. On the soldering device and soldering pin, at the same time, too much flux will also cause adhesion, causing the interconnection strip to stick to the soldering platform or soldering pin
These will affect the welding quality and the smooth progress of subsequent cell welding
The disadvantage of using the second spraying method is: the flux sprayed on the surface of the cell is easy to diffuse, forming crystals, impurities, etc., affecting the appearance of the cell and also affecting the welding quality
Method used
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[0024] Example: The spraying method for the flux of the solar photovoltaic module described in the present invention, before welding, only sprays the flux to the welding area of the interconnection bar in the solar photovoltaic module, specifically comprises the following steps:
[0025] (1) Place the interconnecting strips in the spraying tank, driven by the transmission mechanism to run, detect the movement position of the interconnecting strips through the sensor, and judge whether the interconnecting strips have entered the spraying position; After completion, truncation is carried out before welding, and the length of each interconnection bar after truncation is set as L;
[0026] (2) When the sensor detects that the interconnection strip enters the spraying position, the lower surface of the front L / 2 position and the upper surface of the rear L / 2 position of the previous interconnection strip are respectively the lower welding surface and the upper welding surface, w...
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The invention discloses flux spraying method and device for solar photovoltaic modules. Before welding, flux is only sprayed to welding areas of interconnecting bars in the solar photovoltaic modules. A control unit is used to precisely control a flux sprayer mechanism to open to spray the welding surfaces of the interconnecting bars, spraying to the non-welding surfaces is avoided, the flux is prevented from crystallizing on machine mechanisms in contact with the interconnecting bars, and the consumption of the flux is lowered. The control unit adjusts a flux even spreader to be at the operating position; after a sprayer stops spraying, the flux on the welding surfaces is evenly spread by forward motion of the interconnecting bars through the even spreader; the flux can be evenly spread on the welding surfaces of the interconnecting bars; welding quality is increased; the operating position of the flux even spreader can be changed according to time variation of the forward movement distances of the interconnecting bars, and spraying the non-spraying areas is avoided.
Description
technical field [0001] The invention relates to a flux spraying method and device for solar photovoltaic modules, belonging to the technical field of solar photovoltaics. Background technique [0002] Solar power generation is an emerging renewable energy technology, and solar photovoltaic module power generation is currently the most widely used solar power generation technology. In the production of solar photovoltaic modules, the main process of production is to use interconnection bars to weld crystalline silicon cells in series. Before welding, pre-treatment of the solder (interconnection bar or crystalline silicon cell) by spraying flux can help to enhance the soldering performance of the solder, improve welding quality and production efficiency. [0003] At present, in the production and welding of solar photovoltaic modules, there are two main methods of flux pretreatment coating: 1. Soak the interconnection strips in the flux: soak the interconnection strips in con...
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IPC IPC(8): B23K3/06B05D1/02B05C13/02B05C5/02
Inventor 蔡淘璞张建国赵江杰黄覃彦方波赵建华
Owner CHINA SUNERGY CO LTD