Single-cavity frameless laminated double-glass assembly and laminating method thereof

Abstract

The invention discloses a single-cavity frameless laminated double-glass assembly. The assembly comprises a front glass layer, a first POE adhesive film layer, a solar cell string layer, a second POEadhesive film layer and a back glass layer which are arranged in sequence, a POE adhesive film cushion block is arranged between the back glass layer and the second POE adhesive film layer, and a hardadhesive tape is arranged between the second POE adhesive film layer and the solar cell string layer. The invention also discloses a laminating method. The method comprises the following steps: performing laying according to the structure to form the assembly, directly putting the assembly into laminating equipment without adhesive tape edge sealing after the assembly laying, and laminating the assembly through a two-section laminating method. No edge sealing adhesive tape is adopted, the material cost can be effectively reduced, no frame laminating tool is adopted, the production proceduresare reduced, the production efficiency is improved, and the problems of dissociation and subfissure of battery piece strings are effectively prevented.

Description

technical field [0001] The present application relates to the technical field of photovoltaic modules, in particular to a single-cavity frameless laminated double-glass module and a lamination method thereof. Background technique [0002] Double-glass photovoltaic module refers to a composite layer composed of two pieces of glass and solar cells, and the photovoltaic cell module is formed by connecting wires in series and parallel to the lead terminals between the cells. Advantages of double-glass photovoltaic modules: the warranty of ordinary modules is 25 years, while that of double-glass photovoltaic modules is 30 years; it has a higher power generation capacity in the life cycle, which is 21% higher than ordinary modules; the wear resistance of the glass is very good, which also solves the problem. Wind and sand resistance of components in the wild. [0003] Therefore, it is precisely because of the above advantages that double-glass photovoltaic modules are widely used...

AI Technical Summary

Problems solved by technology

[0003] Therefore, it is precisely because of the above advantages that double-glass photovoltaic modules are widely used; specific existing double-glass modules are divided into framed and frameless, and framed modules are gradually replaced by frameless ones due to their heavy weight. The main structure of the frameless double glass module is laminated with edge banding tape + lamination tooling. During the lamination process of the tooling, the tooling is a frame structure that needs to be sleeved outside the module to reduce the risk of hidden cracks in the module. risk, but the use of the frame will inevitably lead to increased manpower during the lamination process, which will inevitably affect the production cycle, and there will also be a risk of component package glass bursting under force, but after lamination, the spacing , hidden cracks and can not cancel tooling

[0004] In addition, the structure of the existing double-glass module specifically includes front semi-tempered glass + POE + cell + POE + rear semi-tempered glass, and then bonded with edge-sealing tape to form a package; the details are as follows: figure 1 As shown, the upper and lower surfaces are respectively provided with back semi-tempered glass 1' and front semi-tempered glass 4', and then a layer of POE film 2' next to the back semi-tempered glass 1', and next to the front semi-tempered glass 4' Another layer of POE film 2', and then the battery sheet 3' located in the center. The battery sheet is a multi-string, side-by-side structure. The surrounding of the module needs to be bonded with edge-sealing tape 5' during the lamination process. ; However, in the lamination process of this structure, because the glue forming the POE film migrates outward under pressure and is hindered by the edge tape, it is easy to cause the glue to turn over, thereby polluting the glass and affecting the use of components. The side tape is mostly used in the way of full side sealing, resulting in waste of materials; in addition, the lamination force of the double glass module with this structure is as shown in the attached figure 2 As shown, the lamination temperature is about 140-155°C during the lamination process, and the entire lamination time is about 15-25 minutes. Therefore, the front semi-tempered glass 4' is heated during the lamination process, and the edge areas on both sides of it are warped upwards. At the same time, the semi-tempered glass 1' on the back is forced downward due to the pressure of the silica gel plate. These two pressures will cause the cell strings located at the edges of the left and right sides of the module to dissociate inward due to the above two forces. As a result, the spacing of the battery strings is not good (the spacing is offset) and the cells are cracked, which seriously affects the use effect of the battery components.

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