Gridding packaging adhesive film and preparation method thereof

Abstract

The invention relates to a gridding packaging adhesive film and a preparation method thereof, and belongs to the technical field of photovoltaic cell modules. The gridding packaging adhesive film comprises an adhesive film surface layer which is used for blocking ultraviolet rays and providing an adhesion basis for a reflection grid layer; a reflection grid layer which is of a grid-shaped structure and used for reflecting light, wherein the outline of the reflection grid layer is matched with the gap between the two battery pieces and the gap between the battery pieces and the edge of the assembly; and a transparent adhesive film layer which is used for packaging the photovoltaic backboard or the back photovoltaic tempered glass and is arranged on one side, far away from the adhesive filmsurface layer, of the reflection grid layer. The packaging adhesive film has the advantages that the structure of the reflection grid layer is uniform and stable, and cross-linking deformation along with flowing of the transparent adhesive film layer is avoided, the adhesive film surface layer serving as a forming basis of the reflection grid layer can also block ultraviolet rays, and aging deformation of the reflecting layer, the adhesive film layer and the back plate behind the adhesive film surface layer is prevented.

Description

technical field [0001] The invention relates to the technical field of photovoltaic cell components, in particular to a gridded packaging adhesive film and a preparation method thereof. Background technique [0002] For the field of photovoltaic power generation, high conversion efficiency and low manufacturing cost have always been the goals pursued. At present, due to the gap between the cells in the photovoltaic module, the light irradiated in the gap cannot be fully absorbed and utilized by the cells; moreover, the cells that can transmit light will also cause energy loss, resulting in low efficiency of the photovoltaic module on cell efficiency. [0003] The white highly reflective backplane can utilize the light in the gap, and the white adhesive film on the back layer can also partially utilize the light, and the power gain is higher than that of the white backplane. The principle of both is to reflect the light at the gap to the front glass, and reflect or even tot...

AI Technical Summary

Problems solved by technology

[0005] However, in the prior art, the gridded reflective layer is often formed with an adhesive film layer as the base. During the lamination process, as the encapsulation film flows and cross-links under high temperature and vacuum conditions, it is easy to cause the shape of the gridded reflective layer to "deviate", resulting in inefficient reflection of light and reducing the efficiency of the photovoltaic cell module. power generation efficiency

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