Method for arranging silicon dioxide coating on surface of solar photovoltaic back plate

A solar photovoltaic and silicon dioxide technology, applied in the field of solar photovoltaic backsheets, can solve the problems of delamination, foaming, high water vapor transmission rate of polymer films, affecting the photoelectric conversion efficiency and service life of photovoltaic modules, etc. Good protection, extended aging time, good efficiency and long-term reliability

Inactive Publication Date: 2015-03-04
GUANGDONG SHENGYI SCI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] Existing photovoltaic backsheets are prone to defects such as delamination and blistering after a long period of time under humid conditions. The main reason is that the water vapor transmission rate of the polymer film is relatively high, especially after long-term aging. Poor, eventually leading to failure to protect the normal use of photovoltaic cells, affecting the photoelectric conversion efficiency and service life of photovoltaic modules

Method used

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  • Method for arranging silicon dioxide coating on surface of solar photovoltaic back plate
  • Method for arranging silicon dioxide coating on surface of solar photovoltaic back plate

Examples

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Embodiment 1

[0042] A method for arranging a silicon dioxide coating on the surface of a solar photovoltaic backplane, comprising the steps of,

[0043] The two sides of the solar photovoltaic backboard obtained in Comparative Example 1 are coated with a layer of polysilazane solution, and the dry thickness of the coating is 200 nanometers; then, the relative humidity is 85%, and the temperature is 85° C. in an oven for 2-3 hours; then Baking at a temperature of 120-150° C. for 1-2 hours, thereby converting the polysilazane solution into a silicon dioxide coating, and obtaining a solar photovoltaic backplane with a silicon dioxide coating.

Embodiment 2

[0045] A method for arranging a silicon dioxide coating on the surface of a solar photovoltaic backplane, comprising the steps of,

[0046] 1) Configure adhesive glue;

[0047] 2) PET film gluing: take 250 micron PET film, coat the above-mentioned adhesive glue on one side of the PET film, drive off the solvent, dry, and the dry thickness of the coating layer is 10 microns; then the PET film glued surface is combined with the fluorine film Rolling, rolling temperature 80-120°C, pressure 0.1-2MPa; Then, coat the above-mentioned adhesive glue on the other side of the PET film, drive off the solvent, dry, and the dry thickness of the coating layer is 10 microns; then coat the PET film The rubber surface and the fluorine film are compositely rolled, and the rolling temperature is 80-120°C, and the pressure is 0.1-2MPa to obtain a glass film-based backplane;

[0048] 3) curing the glass film-based backsheet obtained in step 2) at 60-100° C. for 6-10 hours to obtain a solar photovolt...

Embodiment 3

[0051] A method for arranging a silicon dioxide coating on the surface of a solar photovoltaic backplane, comprising the steps of,

[0052] 1) Configure adhesive glue;

[0053] 2) PET film gluing: take 250 micron PET film, coat the above-mentioned adhesive glue on one side of the PET film, drive away the solvent, dry, and the dry thickness of the coating layer is 10 microns; then the PET film gluing surface is compounded with the fluorine film Rolling, rolling temperature 80-120 ℃, pressure 0.1-2MPa; Then, coat the above-mentioned adhesive glue on the other side of the PET film, drive off the solvent, dry, and the dry thickness of the coating layer is 10 microns; then coat the PET film The rubber surface and the fluorine film are compositely rolled, and the rolling temperature is 80-120°C, and the pressure is 0.1-2MPa to obtain a glass film-based backplane;

[0054] 3) curing the glass film-based backsheet obtained in step 2) at 60-100° C. for 6-10 hours to obtain a solar pho...

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Abstract

The invention provides a method for arranging a silicon dioxide coating on the surface of a solar photovoltaic back plate and the solar photovoltaic back plate prepared through the method. The method comprises the following steps: coating one or two surfaces of the solar photovoltaic back plate with a layer of polysilazane solution; then baking the solar photovoltaic back plate for 2-3 hours in an oven of which the relative humidity is 85 percent and the temperature is 85 DEG C; then baking the solar photovoltaic back plate for 1-2 hours at the temperature of 120-150 DEG C, so that the polysilazane solution is converted into the silicon dioxide coating, and the solar photovoltaic back plate with the silicon dioxide coating is obtained. By arranging the silicon dioxide coating on an outer-layer fluorine film, water vapor can be more effectively prevented from penetrating through the outer-layer fluorine film, so that an inner-layer PET (Polyethylene Terephthalate) film and a solar photovoltaic cell are protected from being slightly attacked by the water vapor, the aging time of the PET film is effectively prolonged, the solar photovoltaic cell is better protected, and the efficiency and the long-time use reliability of the solar photovoltaic cell are facilitated.

Description

technical field [0001] The invention relates to the technical field of solar photovoltaic backplanes, in particular to a method for disposing a silicon dioxide coating on the surface of a solar photovoltaic backplane. Background technique [0002] Commonly used solar backsheets can be divided into TPT (KPK is also the structure), TPE, all-PET and PET / polyolefin structures according to the structure, where T refers to the polyvinyl fluoride (PVF) film of DuPont, whose trade name is Tedlar. K refers to the vinylidene fluoride (PVDF) produced by the French ARKEMA company, and its brand name is Kynar. P refers to biaxially stretched polyethylene terephthalate film, namely PET film, also known as polyester film or polyester film. E refers to ethylene-vinyl acetate resin EVA. Polyolefins refer to various plastics with a carbon-carbon structure as the main chain. Use suitable adhesive between each structural layer to form a solar backsheet, such as figure 1 . [0003] Due to c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18H01L31/049
CPCH01L31/186Y02E10/50Y02P70/50
Inventor 刘东亮
Owner GUANGDONG SHENGYI SCI TECH
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