Welding apparatus for solar module

Abstract

The invention relates to a welding apparatus for a solar module, comprising a hot aluminum plate, a label backing paper, a panel and a double faced adhesive tape, wherein the panel is arranged on one side of a cell film, the double faced adhesive tape is coated on an upper surface and a lower surface of the panel, the panel coated with the double faced adhesive tape and one end of the cell film close to the panel are clamped between the label backing paper and the hot aluminum plate. Compared with the prior art, a weld point can be located well and the weld balance can be reserved by utilizing the welding apparatus, a stress point tending to cause the splinter and concealed crack of the cell film can be effectively avoided; the welding apparatus has effect of buffering external force so as to avoid the external force from being directly acted on the cell film.

Description

technical field [0001] The invention relates to a solar cell assembly, in particular to a welding device for a solar cell assembly. Background technique [0002] Crystalline silicon solar cells are very thin and fragile, so they cannot be used directly. Moreover, the battery sheet is the most critical raw material in the module and also accounts for the highest cost. Therefore, in practical applications, multiple cells should be packaged into components to avoid debris and improve service life. [0003] In the packaging process of the module, there is a welding process to weld the interconnection strips between the positive and negative electrodes of the battery, and the welding itself will heat the battery locally, resulting in a difference in the thermal expansion coefficient of the aluminum paste coating and the silicon layer, which will also cause The uneven distribution of local internal stress causes defects such as slivers, hidden cracks, and slivers generated durin...

AI Technical Summary

Problems solved by technology

[0003] In the packaging process of the module, there is a welding process to weld the interconnection strips between the positive and negative electrodes of the battery, and the welding itself will heat the battery locally, resulting in a difference in the thermal expansion coefficient of the aluminum paste coating and the silicon layer, which will also cause Inhomogeneous distribution of local internal stress causes defects such as slivers, hidden cracks, and slivers generated during lamination operations

Although many component manufacturers use various methods to optimize the process flow and study the welding temperature, none of them can effectively avoid

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