Photovoltaic modules

Abstract

The invention provides a photovoltaic module. The photovoltaic module a glass layer, a transparent encapsulation layer, a battery piece, a composite encapsulation layer and a photovoltaic module backboard which are arranged in order from top to bottom, wherein the composite encapsulation layer is integrally mold by a white POE layer with a fusion index of 0.5g-10g / 10min and a melting point of 90 DEG C-140 DEG C and a white EVA layer with the fusion index of 3g-15g / 10min and an ethenyl ethanoate (VA) mass percentage of 18-28% through double layer co-extrusion technology. Through the arrangementof a structure, material and component of the composite encapsulation layer, the generation of overflow white and wrinkle problems in the encapsulating process of the photovoltaic module can be effectively reduced, the production efficiency and using power of the photovoltaic module can be improved; production cost of the photovoltaic module can be greatly reduced through the application of the double layer co-extrusion technology, and the photovoltaic module is beneficial to the sustainable development of a photovoltaic module manufacturer.

Description

technical field [0001] The invention relates to a photovoltaic component, in particular to a photovoltaic component with an anti-whitening and anti-wrinkle composite packaging layer. Background technique [0002] With the continuous growth of the photovoltaic market, photovoltaic module manufacturers are facing increasing cost pressures. How to reduce the production cost of photovoltaic modules while improving the power generation efficiency of photovoltaic modules is a key issue that existing photovoltaic module manufacturers need to solve. [0003] In order to solve the above problems, existing photovoltaic module manufacturers often use white EVA as the packaging material. This white EVA packaging material has been a mature product in double-glass modules, but there are still whitening and layering in the application of single-glass modules. Problems such as wrinkles after pressing; even, some white EVA packaging materials will increase the probability of cell cracks duri...

AI Technical Summary

Problems solved by technology

In the low melting index method, resins with a melting index of 3g-7g / 10min are usually used as raw materials. Although the produced white EVA packaging material can reduce the probability of whitening, there is still whitening when used by photovoltaic module manufacturers in batches. production

[0005] When using the ultraviolet crosslinking method to make white EVA packaging materials, high melt index resins are usually used as raw materials, and ultraviolet radiation crosslinking agents are added. After calendering, ultraviolet radiation is used to produce certain crosslinking, so as to reduce the fluidity of white EVA and prevent the Whitening occurs during the lamination process, but there is still a certain problem of whitening when photovoltaic module manufacturers use it in batches

[0006] When using the high-energy ray radiation method to make white EVA packaging materials, high-melt index resins are used as raw materials, and high-energy ray radiation is used for cross-linking. Although the white EVA packaging materials made by this method can effectively prevent the occurrence of whitening phenomenon, but In the process of batch use, the problem of backplane wrinkling often occurs; at the same time, due to the expensive high-energy ray equipment and high energy consumption, the production cost of photovoltaic modules is significantly increased, which is not conducive to the sustainable development of photovoltaic module manufacturers

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