Encapsulation material for photovoltaic module and preparation method of the encapsulation material

Abstract

The invention discloses a packaging material for photovoltaic modules. The packaging material includes the following raw materials in parts by weight: 30-50 parts of fiber cloth, the fiber cloth is made of fiber materials; 50-70 parts of acrylic powder coating, and 50-70 parts of acrylic powder The coating includes an acrylic resin and a curing agent; wherein, the acrylic powder coating is evenly coated on the fiber cloth; the invention not only has low manufacturing cost, but also satisfies the requirements of photovoltaic industry technical standards such as anti-ultraviolet, anti-aging, impact resistance, and fire prevention. It effectively solves the problem of reducing the weight of the photovoltaic module packaging material, improves the convenience of installation, and reduces the installation cost, which is very suitable for large-scale promotion and application in the photovoltaic field; The package size of photovoltaic modules can be changed arbitrarily to meet the installation requirements of different buildings, which further facilitates the installation and application of photovoltaic modules.

Description

technical field [0001] The invention belongs to the photovoltaic field, and in particular relates to a packaging material for a photovoltaic module, and also relates to a preparation method of the packaging material. Background technique [0002] In the current society, energy conflicts and environmental problems are becoming more and more prominent, and the development of various types of clean energy is an inevitable trend. In recent years, the photovoltaic industry has developed rapidly, and technological updates have been gradually accelerated. At present, the photovoltaic industry is developing towards product diversification. The research and development of various functional components with high reliability, high power and low installation cost has become a direction for the development of photovoltaic components. [0003] Solar photovoltaic power generation relies on solar cells to convert light energy directly into electricity. In the past ten years, the total glob...

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Problems solved by technology

[0004] As a packaging material used in the photovoltaic field, it is required to have anti-ultraviolet, anti-aging and other properties, such as Figure 5 As shown, the packaging structure of a typical existing photovoltaic module includes from top to bottom: a tempered glass layer 30c, an upper EVA layer 21c, a photovoltaic cell panel layer 10c, a lower EVA layer 22c, and a back sheet layer 40c, wherein: the tempered glass layer Density up to 2.5g / cm 3 , and the common thickness of tempered glass is 3.2mm, so the weight of tempered glass glass is as high as 8Kg per square meter, and the photovoltaic modules packaged by it are usually of high quality, with a weight of more than 10Kg per square meter. The weight of the module per square meter is at least 12Kg or more. When it is applied on the top of the building or on the wall, it puts forward higher requirements for the supporting structure of the photovoltaic module, which increases the difficulty of engineering construction and the cost of installation. The specific performance For: during the installation process on the top of the building or on the wall, there are heavy weight, high installation labor intensity, and difficult implementation; especially in some occasions, due to the limitation of building load-bearing load, it is impossible to install photovoltaic modules

At the same time, the existing photovoltaic module packaging structure has a single appearance and is not easy to change to meet the requirements of different architectural appearances.

[0005] At present, there are some technical solutions that try to solve the problem of lightweight photovoltaic modules by changing the packaging materials, that is, using high-transmittance films and transparent backplanes instead of tempered glass. Most of the boards only use EVA, POE and other adhesive films. Such encapsulated photovoltaic modules cannot meet the technical standards of the photovoltaic industry in terms of impact resistance and fire resistance.

[0006] There are also some technical solutions disclosed for reducing the weight of photovoltaic modules. For example, the Chinese invention patent with the publication number CN102516852A discloses a weather-resistant, high-thermal-conductivity coating and a heat-dissipating solar backsheet, but the coating requires a large amount of Solvents are very polluting to the environment and do not meet the environmental protection standards

Another example is the Chinese invention patent with the publication number CN102610680A disclosing a solar battery backplane with UV-cured weather-resistant coating, but the liquid coating process it adopts is more complicated, the defect rate is higher, and the equipment investment is large.

Another example is that publication numbers CN102712184A, CN103346182A, CN102969382B, CN101290950B, CN103958196A and a series of Chinese invention patents all adopt fluoropolymers, but fluoropolymers are expensive and increase production costs. It is only a material for photovoltaic backplanes. It is opaque, has low hardness and weak rigidity, and is not suitable for replacing existing tempered glass.

[0007] Therefore, it is necessary to seek a packaging material for photovoltaic modules to solve the problem of heavy weight of the packaging material in the existing packaging structure of photovoltaic modules, and at the same time meet the requirements of photovoltaic industry technical standards such as anti-ultraviolet, anti-aging, impact resistance, and fire prevention.

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