Method for preparing laminated structure of photovoltaic module, laminated structure, photovoltaic module

Abstract

A preparation method for a laminated structure of a photovoltaic assembly, the laminated structure and the photovoltaic assembly, which are prepared by using a lamination process. The lamination process comprises a first heating stage, a second heating stage, and a third pressurization and cooling stage. In the first stage, the heating temperature range is from 110ºC to 130ºC, and the heating time range is from 100 seconds to 600 seconds; in the second stage, the hating temperature range is from 131ºC to 200ºC, and the heating time range is from 100 seconds to 1200 seconds; and in the third stage, the cooling temperature range is from 25ºC to 60ºC, and the pressurization range is from 0.05 Mpa to 0.25 Mpa. The lamination process is implemented in a low-temperature environment, power consumption is reduced, and the flatness of the laminated structure of the photovoltaic assembly is ensured, thereby further facilitating the mounting, enforcement and application of the photovoltaic assembly.

Description

technical field [0001] The invention belongs to the field of photovoltaics, and in particular relates to a method for preparing a laminated structure of a photovoltaic module. The invention also relates to the application of the laminated structure of a photovoltaic module and the photovoltaic module. 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 ...

AI Technical Summary

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 1 As shown, the existing typical laminated structure of photovoltaic modules (also called laminates) is made by sequentially combining ultra-clear tempered patterned glass 21, first EVA film 22, solar cell string 23, second EVA film 24 and The back panel is laminated by 25 layers, among which: the density of ultra-clear tempered embossed glass reaches 2.5g / cm 3 , and its common thickness is 3.2mm, so the weight of the tempered glass glass is as high as 8Kg per square meter. The photovoltaic modules assembled by the laminated structure of the photovoltaic modules are usually of high quality, and their weight reaches more than 10Kg per square meter. Then install the supporting structure, the weight of the photovoltaic module per square meter is at least 12Kg or more. When it is applied to the top of the building or the wall, etc., 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 is specifically manifested in: during the installation process on the top of the building or on the wall, there are heavy weights, labor-intensive installation, and difficult implementation; especially in some occasions, due to the limitation of building load-bearing loads, 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] The prior art closest to the present invention is the Chinese patent with the publication number CN105637653A, which discloses a photovoltaic panel and a method for manufacturing the photovoltaic panel, specifically adopting epoxy-based acrylate and using Glass fiber-reinforced plastic is used as the encapsulation material for the bright side and the back light side of the solar cell string. Although this method solves the problem of heavy weight of the encapsulation material for the laminated structure of photovoltaic modules, all of them use expensive acrylate as the packaging material. Encapsulation materials are not only costly, but also cause the color of photovoltaic modules to be single. This technology also has high lamination temperature and high energy consumption during the lamination process, and the laminated structure of photovoltaic modules obtained is curved, has a certain curvature, and is uneven. It is not conducive to the installation and implementation of photovoltaic modules, and affects the appearance

[0008] Therefore, there is an urgent need to find a way to solve the problems of heavy weight, high cost, cumbersome lamination process and poor lamination effect of the packaging material in the existing photovoltaic module laminated structure, while meeting the requirements of UV resistance, aging resistance and impact resistance. , fire protection, anti-insulation and other photovoltaic industry technical standards

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