A kind of photovoltaic ribbon and its preparation method and photovoltaic module
A photovoltaic ribbon and soldering technology, applied in photovoltaic power generation, electrical components, semiconductor devices, etc., can solve the problems of large changes in solder composition, increase in cost, and no obvious improvement in welding effect, and achieve photoelectric conversion efficiency. The effect of good welding tension and guaranteeing the repair rate of components
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[0046] The invention provides a method for preparing a photovoltaic ribbon, which is characterized in that it comprises:
[0047] A) heating, melting and mixing tin, lead, gallium and bismuth raw materials to obtain a molten liquid;
[0048] B) Contacting the surface of the conductive base tape with the molten liquid to obtain a photovoltaic soldering tape.
[0049] The preparation method of the photovoltaic ribbon provided by the present invention first heats, melts and mixes tin, lead, gallium and bismuth raw materials to obtain a melt.
[0050] According to the present invention, the mass ratio of the tin, lead, gallium and bismuth is preferably (55-65): (35-45): (0.0005-0.5): (1-5); more preferably (56-63) : (36-43): (0.01-0.3): (1-4); most preferably (56-58): (38-40): (0.01-0.05): (2-4).
[0051] The present invention does not limit its source, and it can be commercially available.
[0052] The present invention does not limit the specific manner of the heating and mel...
Embodiment 1~2
[0061] As shown in Table 1, mix the raw materials evenly to form a solder layer and melt it, then dip a copper strip with a thickness of 0.3 mm and a width of 1.5 mm in the molten liquid, and pass through the air knife device to obtain photovoltaic ribbons in sequence. Wherein, the thickness of the solder layer on the upper and lower surfaces of the copper base strip is 23±4um.
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