Anti-aging and anti-cracking polycrystalline solar cell backboard

Abstract

The invention belongs to the technical field of solar photovoltaic cells, and particularly relates to an anti-aging and anti-cracking polycrystalline solar cell backboard, which comprises an outer weather-proof protective layer, a barrier layer, a structure enhancement layer and a laminated bonding layer, wherein the outer weather-proof protective layer and the barrier layer are bonded and fixed through a first bonding layer, and an anti-cracking coating is arranged on the inner surface of the barrier layer. According to the invention, the requirements of insulativity, adhesion and weather resistance of the solar cell backboard are met, so that the solar cell backboard has good water vapor barrier property, and the water vapor transmission rate is greatly reduced; carbon black is used forincreasing the viscosity, stress at definite elongation and hardness of the rubber material; and by adding the carbon fibers, the tensile strength, the tearing strength and the peeling strength of thecoating are enhanced, so that the mechanical properties of the coating and the backboard are greatly improved, the anti-cracking performance of the solar cell backboard is greatly and remarkably improved compared with a traditional backboard structure, and the service life of the solar cell backboard is effectively prolonged.

Description

technical field [0001] The invention relates to the technical field of solar photovoltaic cells, in particular to an anti-aging and anti-crack polycrystalline solar cell backboard. Background technique [0002] As a green and inexhaustible energy source, solar energy is the best choice to replace traditional thermal power generation. Since solar cells need to be exposed to outdoors for a long time, the cells in photovoltaic modules must be protected to prevent the influence and damage of environmental factors such as water vapor, oxygen, and ultraviolet rays in the atmosphere. Therefore, it is necessary to add a layer of back plate at the lower end of the cell to protect the cell. On this basis, the solar battery backplane is required to have the following characteristics: First, the solar battery backplane must have excellent weather resistance and be able to resist bad weather; Good protection is used to fix the silicon wafer and EVA. In addition, the solar cell backshee...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides an anti-aging and anti-cracking polycrystalline solar cell back sheet, which solves the problems of poor anti-crack and anti-crack performance of the existing solar cell back sheet, and relatively low tensile, tearing and peeling strengths. Low mechanical properties, strength and stability, and cannot meet the requirements of low water vapor transmission rate, which affects the service life of solar cell backplanes

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