A composite packaging integrated functional solar battery backplane

Abstract

A composite packaging integrated functional solar cell backsheet disclosed by the present invention, the photovoltaic backsheet is composed of a weather-resistant layer, an adhesive layer, a PET layer, an adhesive layer, a functional layer, and the functional layer from the outside to the inside. Including integrally formed milky white layer and transparent layer, wherein the milky white layer is a structure of one layer or more, with a thickness of 20~200μm, including modified inorganic fillers, modified resins, UV absorbers and antioxidants, transparent layer and cell stickers Combined, adopting a structure of one layer or more, with a thickness of 200-800 μm, including modified resin, ultraviolet absorber and antioxidant, a composite packaging integrated functional solar battery backsheet disclosed by the present invention adopts integrated functions The layer can replace the traditional adhesive film, which not only has high weather resistance, high reflection, high insulation, and low water permeability, but also protects the component's 25-year service life and increases the power of the component.

Description

technical field [0001] The invention relates to a photovoltaic battery backboard, in particular to a compound packaged integrated functional solar battery backplane. Background technique [0002] Crystalline silicon solar cell components include eight major materials, namely glass, encapsulation film, battery sheet, welding ribbon, silica gel, aluminum frame, junction box, and photovoltaic backplane. Photovoltaic backplane is an extremely important packaging material in photovoltaic modules. The sheet plays a supporting role, and at the same time, it directly contacts the external environment on a large area, and undertakes the important mission of ensuring the stable power generation of photovoltaic modules for 25 years. Excellent insulation, barrier and weather resistance are the reliability guarantees for its long-term application. [0003] All the backsheets currently on the market need to add a layer of adhesive film between the backsheet and the battery sheet, through ...

AI Technical Summary

Problems solved by technology

Among them, the EVA replacement layer is a single-layer structure. After lamination into components, there are many defects. The main manifestations are: ①After lamination, it is squeezed by the structural reinforcement layer and glass, and there is a phenomenon of edge overflow and delamination; ②The replacement layer It is a micro-foamed polyolefin structure, which is relatively soft. During the lamination process, the battery sheet and the ribbon completely penetrate the EVA replacement layer and directly contact the structural reinforcement layer, resulting in cracks and fragments of the battery sheet; ③ more serious is due to The conductor completely penetrates the EVA replacement layer, causing the EVA replacement layer to completely lose its insulating effect, and can only rely on the weather-resistant layer and the structural reinforcement layer for insulation, and the overall insulation thickness is reduced

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