Solar back plate with high barrier property

Abstract

The invention relates to a solar back plate with the high barrier property. The solar back plate comprises a polyester film, a high reflection layer and a bonding layer-bonded weather resistance layer are sequentially arranged on one side of the polyester film, and a high reflection layer, barrier layers and a bonding layer-bonded weather resistance bonding layer are sequentially arranged on the other side of the polyester film; the barrier layers comprise the oxygen barrier layer and the vapor barrier layer. The solar cell back plate is obviously superior to an existing back plate, the electrical insulation property and the vapor barrier property are improved by arranging the polyester film, and the solar back plate is high in damp-heat resistance and aging resistance, long in life, high in weather resistance and reflection rate and excellent in aging resistance. By adopting a gelatin material as the oxygen barrier layer and adopting an inorganic material as the vapor barrier layer, the solar back plate is low in cost, the vapor barrier layer and the oxygen barrier layer can barrier vapor and oxygen respectively, the barrier property of the back plate is promoted, and the vapor and oxygen transmission rate of the solar back plate is obviously decreased.

Description

technical field [0001] The invention relates to the field of solar battery modules, in particular to a solar backboard with high barrier properties. Background technique [0002] Solar energy, as a green and inexhaustible energy source, is undoubtedly the best choice to replace traditional thermal power generation. Since solar cells need to be exposed to the outdoors for a long time, the cells in photovoltaic modules need to be protected to prevent atmospheric pollution. The impact and overlooking of environmental factors such as water vapor, oxygen, and ultraviolet rays. The solar backsheet is one of the accessories of the whole solar cell. It mainly plays the role of mechanical support and protection of the cell from the penetration of environmental factors. At present, the performance of the solar backsheet with the existing structure is unstable, and the reflectivity, anti-aging performance, and water resistance performance Poor, the complex structure leads to complex p...

AI Technical Summary

Problems solved by technology

The solar backsheet is one of the accessories of the whole solar cell. It mainly plays the role of mechanical support and protection of the cell from the penetration of environmental factors. At present, the performance of the solar backsheet with the existing structure is unstable, and the reflectivity, anti-aging performance, and water resistance performance Poor, complex structure leads to complex processing and increases production costs

In addition, the polyester molecular chain of the existing polyester film is relatively soft. In order to avoid the repulsive force between atoms during the stacking process, relative movement is easy to occur, so that more spaces appear in the stack, and small molecules such as oxygen and water vapor dissolve in the stack. In PET, since polyester film is a medium barrier material, it has limited barrier properties to water vapor and oxygen, which affects the barrier of the entire solar backsheet, which is not conducive to long-term use.

Images