Photovoltaic module cold pressing process

Abstract

The invention aims to overcome the defect that the edge of a photovoltaic module is easy to warp when the photovoltaic module, of which an upper cover plate and a lower cover plate are different in material, is cooled through an existing cold pressing process, and provides a photovoltaic module cold pressing process. The photovoltaic module subjected to hot pressing and curing is placed in a cooling cavity formed by an upper cooling plate and a lower cooling plate; and the upper cooling plate and the lower cooling plate extrude to apply pressure and cooling effect to the photovoltaic module, wherein the cooling temperature is higher than the dew point temperature of the environment where the photovoltaic module is located and lower than 15 DEG C; the pressure is greater than 0.01 MPa and smaller than the damage pressure of the module; and the cooling and pressing time is 6-15 minutes. Through the cold pressing process, the surface and the bottom surface of the photovoltaic module are simultaneously cooled and pressed to realize quick cooling; since the cooling plate is in direct contact with the module, the cooling efficiency of the cooling plate is improved, and the cooling intensity for the photovoltaic module is high; and the cases that the photovoltaic module is warped and deformed due to inconsistent cooling speed caused by inconsistent materials of each layer or the surface layer and the bottom layer of the photovoltaic module can be reduced.

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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