Compound type embossing photovoltaic welding strip and machining method thereof

Abstract

The invention provides a compound type embossing photovoltaic welding strip. The compound type embossing photovoltaic welding strip comprises a strip-shaped conductive substrate which is welded with a main grid line of a solar cell plate; a plurality of specially-shaped metal wires capable of reflecting light are put on one side of the upper surface of the strip-shaped conductive substrate; the lengths of the specially-shaped metal wires are not greater than the maximum length of the solar cell plate. Furthermore, the specially-shaped metal wires have sections which are shaped like isosceles triangles with top angles being greater than 90 degrees; furthermore, the sections of the specially-shaped metal wires are semicircular; furthermore, the specially-shaped metal wires are parallelly arranged on the strip-shaped conductive substrate; furthermore, the specially-shaped metal wires are made of pure copper or pure silver; if the specially-shaped metal wires are made of pure copper, a layer of soldering tin is plated on the outer surface of each specially-shaped metal wire. The invention also discloses a machining method for combining the compound type embossing photovoltaic welding strip with solar cells through serially welding machining. According to the compound type embossing photovoltaic welding strip, the strength for welding the photovoltaic welding strip with back electrodes of the solar cells can be improved; meanwhile, the photovoltaic conversion efficiency is improved.

Description

technical field [0001] The invention relates to the field of automatic welding of solar battery strings, in particular to a composite embossed photovoltaic welding strip and a processing method thereof. Background technique [0002] When conventional crystalline silicon solar cells are packaged into photovoltaic modules, they need to be welded into solar cell strings with photovoltaic ribbons, and then stacked, laminated, and assembled. After the ordinary photovoltaic ribbon is welded to the solar cell, there will be a shading area, and the light incident on the surface of the photovoltaic ribbon 2 is reflected out of the photovoltaic module and cannot be used, such as figure 1 As shown, the light-receiving area of ​​the cell sheet is reduced, and the conversion efficiency is reduced. figure 1 Reference numeral 1 in is the upper surface of the photovoltaic module, that is, the upper surface of the front glass. [0003] In the prior art, the photovoltaic industry presses th...

AI Technical Summary

Problems solved by technology

However, this kind of embossed ribbon needs to precisely process V-shaped groove embossing on the ribbon, which requires high processing accuracy and high production costs.

And because the embossing is pressed on the upper surface of the ribbon, when the embossed ribbon is welded to the busbar on the back of the crystalline silicon solar cell, the contact area is small, which is likely to cause desoldering and virtual soldering, which will bring subsequent hidden dangers

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