Solar cell panel

Abstract

The invention discloses a solar cell panel, comprising a glass plate, a photocell slice and a back plate which are overlapped in sequence, wherein a first adhesive for ultraviolet rays to penetrate through is arranged between the glass plate and the photocell slice; and a second adhesive containing an ultraviolet ray cut-off agent is arranged between the photocell slice and the back plate. In the invention, the encapsulation loss of the solar cell panel is lower than that obtained by directly using a double-layer ethylene-vinyl acetate copolymer (EVA) containing the ultraviolet ray cut-off agent, and other properties of the solar cell panel are substantially as same as those of the EVA containing the ultraviolet ray cut-off agent; it is proved by an anti-ultraviolet experiment that the structure provides a better protection to the back plate in comparison with the double-layer EVA without the ultraviolet ray cut-off agent and has no difference with the double-layer EVA with the ultraviolet ray cut-off agent. By using the combining method, the encapsulation loss of the module can be reduced by 0.5% on the premise that the production cost of the module is not increased.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a solar cell panel. Background technique [0002] The sunlight absorbed by commonly used solar cells is mainly concentrated in the range of 330um to 1200um in wavelength. However, in the development of high-efficiency batteries, sunlight with a wavelength below 300um is mainly used, that is, ultraviolet rays. Because the wavelength of ultraviolet rays is short, electrons The vibration value is high, the energy generated is large, and the conversion efficiency of components has a large room for improvement. [0003] However, in existing solar cells, photovoltaic modules that absorb sunlight, ie solar panels, most of the backsheets used are thermoplastic elastomer materials, and the inner side does not have anti-ultraviolet performance, which is easy to cause aging of the backsheet. In order to prevent the aging of the backsheet, module manufacturers generally use ethylene-vin...

AI Technical Summary

Problems solved by technology

[0002] The sunlight absorbed by commonly used solar cells is mainly concentrated in the range of 330um to 1200um in wavelength. However, in the development of high-efficiency batteries, sunlight with a wavelength below 300um is mainly used, that is, ultraviolet rays. Because the wavelength of ultraviolet rays is short, electrons The vibration value is high, the energy generated is large, and the conversion efficiency of components has a large room for improvement

[0003] In existing solar cells, photovoltaic modules that absorb sunlight, that is, solar panels, most of the backsheets used are thermoplastic elastomer materials, and the inner side does not have anti-ultraviolet performance, which is easy to cause aging of the backsheet.

In order to prevent the aging of the backsheet, module manufacturers generally use ethylene-vinyl acetate copolymer (EVA) containing a UV cut-off agent. Although this can reduce the aging of the battery backsheet, it reduces the efficiency of the module's use of sunlight, especially for current Some high-efficiency batteries have a considerable impact

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