High-efficiency packaging method for MWT assembly

Abstract

The invention provides a high-efficiency packaging method for an MWT assembly, which comprises the following steps of firstly coating polyurethane resin on a conductive metal foil, and performing solvent volatilization and primary curing after passing through a drying tunnel, then spraying epoxy acrylic resin on the surface layer of the polyurethane resin, and curing the epoxy acrylic resin on the surface layer through ultraviolet irradiation, after laser drilling is carried out on the insulating layer, conducting battery piece placement, and finally, laying other materials for producing the assembly, and carrying out secondary lamination curing in a laminating machine. The packaging surface obtained through the method has certain strength and hardness, uneven current caused by layering due to insufficient bonding strength in the long-term outdoor use process is avoided, the lamination subfissure proportion and the glue hole blocking proportion in the lamination process are improved, the lamination time rhythm can be adjusted, the power is improved, and hot spots are improved.

Description

technical field [0001] The invention relates to the field of photovoltaic components, in particular to an efficient packaging method for MWT components. Background technique [0002] In conventional MWT photovoltaic modules, since the positive and negative poles of the component cells are arranged on the back of the battery sheet, conductive glue is usually used to bond the electrode points to the conductive core plate, and the positive and negative pole currents are collected by the conductive core plate, because the positive and negative electrodes are on the back of the battery. On the back side, when packaging, a special insulating material film must be laid on the battery sheet and the conductive core board to separate the battery sheet from the conductive metal foil. At present, the packaging structure of MWT components from top to bottom is glass, EVA, battery sheet, and insulating material. Layer, metal conductive circuit layer, encapsulation film layer, backplane la...

AI Technical Summary

Problems solved by technology

[0003] The isolation layer between the backplane and the conductive core board of the existing MWT component packaging structure is mostly a whole structure, such as EPE or the whole sheet is coated with an insulating adhesive layer, and then the positive and negative poles are connected to the conductive core by punching holes in the insulating layer. The bonding of metal foil adopts laying method, the process is complex, and requires high hole alignment accuracy, difficult on-site operation, and high production cost. Although the glue coating process can save raw material costs, it is prone to black spots in the lamination process. Bad string spacing, obvious power drop, uneven current after hot spot test

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