Photovoltaic module cold pressing process

Abstract

The purpose of the present invention is to provide a photovoltaic module cold pressing process to solve the problem that the edge of the photovoltaic module is prone to warping when the photovoltaic module whose upper cover and lower cover are made of different materials is cooled by the existing cold pressing process. The photovoltaic modules cured by hot pressing are placed in the cooling chamber composed of the upper cooling plate and the lower cooling plate, and the photovoltaic modules are pressed and cooled by the extrusion of the upper cooling plate and the lower cooling plate. The cooling temperature is the environment where the photovoltaic modules are located The dew point temperature is above 15°C, the pressure is greater than 0.01 MPa and less than the damage pressure of the component, and the cooling and pressing time is 6-15 minutes. Using the cold pressing process of the present invention, the surface and bottom surface of the component are simultaneously cooled and pressed to be rapidly cooled. The direct contact between the cooling plate and the module improves the cooling efficiency of the cooling plate, and the cooling intensity of the photovoltaic module is high, so it can reduce the warping and deformation of the photovoltaic module due to the inconsistency of cooling speed caused by the inconsistency of the materials between the layers of the photovoltaic module or the surface layer and the bottom layer Case.

Description

technical field [0001] The invention relates to a photovoltaic module cold pressing process used in photovoltaic module packaging. Background technique [0002] When making solar photovoltaic cells, it is necessary to package the smallest unit ----- the photovoltaic module. At present, the more conventional packaging method is to first vacuum hot press the photovoltaic module above the melting temperature of the adhesive layer, and then apply it to the adhesive layer. Vacuum heat press curing is carried out at the layer curing temperature, and then the photovoltaic module is further cooled and flattened by cold pressing. The existing cold pressing process adopts natural cooling or cooling at room temperature, and generally uses cooling at room temperature, that is, after hot pressing and solidification, the battery assembly is transferred from the lamination chamber to a cooling position, and is cooled naturally or blown at room temperature , using this method, when the mat...

AI Technical Summary

Problems solved by technology

The existing cold pressing process adopts natural cooling or cooling at room temperature, and generally uses cooling at room temperature, that is, after hot pressing and solidification, the battery assembly is transferred from the lamination chamber to a cooling position, and is cooled naturally or blown at room temperature , using this method, when the material cooling rate of the upper and lower cover plates of the laminated photovoltaic module is inconsistent, such as when encapsulating roof tile components, due to the inconsistent heat conduction speed and material properties of the upper and lower cover plates, the photovoltaic module The cooling rate of the upper cover and the lower cover is unbalanced, and the edge of the photovoltaic module is prone to warping, so that the warpage index of the module exceeds the current standard requirement of 1mm, and the module that meets the standard cannot be produced; in addition, when the module When the material of the upper cover and the lower cover are the same but the thickness is not the same, such as when encapsulating photovoltaic modules for glass curtain walls, using the existing process requires a longer vacuum lamination time for vacuum lamination to prevent warping of photovoltaic modules , making the work efficiency low

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