Preparation method for battery backplanes

Abstract

The invention belongs to the technical field of solar energy, and provides a preparation method for battery backplanes. The preparation method includes providing a first substrate layer, the first substrate layer having a first surface and a second surface in opposite arrangement; respectively preparing a first functional layer and a second functional layer on the first and second surfaces of thefirst substrate; providing or preparing a second substrate layer, the second substrate layer having a first surface and a second surface in opposite arrangement; and respectively preparing a third functional layer and a fourth functional layer on the first and second surfaces of the second substrate layer. The beneficial effects of the preparation method are as follows: prepared battery backplanescan withstand high voltage and effectively enhance the utilization rates of sunlight, so that generating efficiency can be increased; and the prepared battery backplanes can well obstruct steam, havegood wear resistance, heat dissipation and shock absorption effects, are light and thin, and can enhance the stability of solar cells and prolong the service life of the solar cells.

Description

technical field [0001] The invention belongs to the technical field of solar energy, and in particular relates to a method for preparing a battery back plate. Background technique [0002] With the widespread application and popularization of solar cell power generation technology with the advantages of environmental protection and energy saving, the huge market demand for back sheet film for solar cells has been driven. The solar battery backsheet is located on the back of the solar battery module, which protects and supports the battery chip and is one of the most important packaging materials to prolong the service life of the battery. [0003] The solar cell backsheet is an extremely important packaging material in photovoltaic modules, which supports and protects the battery chips. At the same time, it directly contacts with the external environment in a large area and undertakes the important mission of ensuring stable power generation of photovoltaic modules. It must ...

AI Technical Summary

Problems solved by technology

[0006] (1) The surface of the battery backplane is a planar structure, and most of the vertical incident light or incident light at a small angle will be reflected into the air again by the backplane, which cannot be well absorbed and utilized by the battery sheet, which is not conducive to the photovoltaic module The absorption of light often has the problem of low reflectivity, which affects the power generation efficiency of the cell

[0007] (2) The barrier effect of the battery back plate is poor, which is not conducive to improving the overall stability of the battery and prolonging the life of the CIGS chip battery that is sensitive to water vapor; the battery back plate is coated with a wear-resistant layer on the material plate of the battery back plate, and cannot Ensure that the wear-resistant paint is fully attached to the surface of the backplane, which will also lead to a low service life of the photovoltaic backplane

[0008] (3) The battery backsheet is a fluorine-containing backsheet, which contains or releases the toxic element fluorine during production and use, and is not easy to recycle, resulting in high cost of use and environmental pollution

[0009] (4) The thickness of the battery backplane is relatively thick, which does not meet the development needs of lightweight mobile energy products, and the shock absorption effect is poor

[0010] (5) The battery backplane is used at high temperature for a long time, which generates a lot of heat, and the heat conduction and heat dissipation effect is poor, which will cause heat to be difficult to discharge. Larger potential safety hazards

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