阅读说明：本技术 增强太阳能板发电效率的薄膜的制备方法 (Preparation method of film for enhancing solar panel power generation efficiency ) 是由 沙嫣 沙晓林 于 2021-08-04 设计创作，主要内容包括：本发明公开了一种增强太阳能板发电效率的薄膜的制备方法；其薄膜用组合物主要包括树脂基材60％-70％,散热剂2％-5％,抗静电剂2％-3％,增塑剂10％-20％,增色剂1％-2％；所述散热剂包括氧化石墨烯、白石墨烯中的一种或几种。本发明制备得到的薄膜可以通过eva热熔胶涂覆在太阳能电池片上部玻璃面的表面,不仅可以有效的防止恶劣天气对电池片的腐蚀,还可以调节太阳光照强度,增加光线的透过率,从而增强太阳能发电效率。(The invention discloses a preparation method of a film for enhancing the power generation efficiency of a solar panel; the film composition mainly comprises 60-70% of resin base material, 2-5% of heat dissipating agent, 2-3% of antistatic agent, 10-20% of plasticizer and 1-2% of toner; the heat radiating agent comprises one or more of graphene oxide and white graphene. The film prepared by the invention can be coated on the surface of the upper glass surface of the solar cell sheet through the eva hot melt adhesive, so that the corrosion of the solar cell sheet in severe weather can be effectively prevented, the solar illumination intensity can be adjusted, the light transmittance is increased, and the solar power generation efficiency is enhanced.)

1. The composition for the film for enhancing the power generation efficiency of the solar panel is characterized by comprising the following components in percentage by weight:

the heat radiating agent comprises one or more of graphene oxide and white graphene; the particle size of the graphene oxide or the white graphene is 5-10 micrometers;

the resin base material comprises one or more of polyethylene, polypropylene, poly-1-butene and poly-4-methyl-1-pentene.

2. The composition for a film for enhancing solar panel power generation efficiency according to claim 1, wherein the antistatic agent comprises one or more of polyoxyethylene, phosphate, and ethylene oxide derivatives.

3. The composition for a film for enhancing solar panel power generation efficiency according to claim 1, wherein the plasticizer comprises one or more of dioctyl phthalate and dibutyl phthalate.

4. The composition for film for enhancing solar panel power generation efficiency according to claim 1, wherein the color enhancer comprises zinc oxide, rare earth elements Eu and Tb.

5. The composition for a film for enhancing solar panel power generation efficiency according to claim 4, wherein the mass ratio of zinc oxide to the rare earth elements Eu and Tb in the color enhancer is 1:0.1 to 0.5.

6. A method for preparing the composition for a thin film for enhancing solar panel power generation efficiency according to any one of claims 1 to 5, wherein the method comprises the steps of:

s1, adding the resin base material into a stirring reaction kettle, heating to 120-200 ℃, and stirring for 1-2 hours;

s2, adding the antistatic agent and the plasticizer into a reaction kettle according to the mass ratio of 1: 3-1: 15, and continuously stirring for 1-2 hours;

s3, adding a color enhancer, and cooling to 85-150 ℃;

s4, adding the heat dissipating agent, and stirring at a constant speed at 80-120 ℃;

and S5, after 0.5-1 hour, reducing the reaction temperature to 60-75 ℃, performing wire drawing forming, and shearing into resin particles.

7. The method of claim 6, wherein the heat-dissipating agent is white graphene or graphene oxide prepared by a redox method in step S4.

8. The method for preparing a composition for a film for enhancing solar panel power generation efficiency according to claim 6, wherein in step S5, the resin particles have a particle size of 1 to 1.5 mm.

9. A preparation method of a film for enhancing the power generation efficiency of a solar panel is characterized by comprising the following steps:

a1, mixing and melting the resin particles prepared by the preparation method of claim 7 or 8 and a common resin base material according to the proportion of 0.5-1:1-1.5, and performing extrusion casting film forming to obtain a functional film;

a2, spreading the obtained functional film on the glass surface of a solar cell piece, and heating and adhering the functional film together at 50-90 ℃ to obtain the solar panel with the film for enhancing the power generation efficiency.

10. The method of claim 9, wherein the functional film has a thickness of 0.01-0.1 mm.

Technical Field

The invention belongs to the technical field of solar panel film coating, and relates to a preparation method of a film for enhancing the power generation efficiency of a solar panel; in particular to a preparation method of a film which has high corrosion resistance, can prolong the service life of a solar panel and enhance the power generation efficiency of the solar panel.

Background

Solar panels (Solar panels), also called Solar modules, are photovoltaic semiconductor sheets that generate electricity directly from sunlight, and are assemblies of several Solar cells assembled in a certain manner on a single panel, which are the core part of a Solar power generation system.

The film refers to a film made of polyvinyl chloride, polyethylene, polypropylene, polystyrene and other resins, and is used for packaging and as a film coating layer.

The photovoltaic effect, assuming that light is incident on the solar cell and light is admitted at the interface layer, photons of sufficient energy can excite electrons from covalent bonds in the P-type and N-type silicon, causing the onset of electron-hole pairs. The electrons and holes adjacent to the interface layer will be separated from each other as a result of the electric field of the space charge before they recombine. Electrons move to the positively charged N-region and holes to the negatively charged P-region. An outward testable voltage will be developed between the P-region and the N-region via the charges of the interface layer, respectively. Electrodes can be added on both sides of the silicon chip and connected into a voltage meter. For the crystalline silicon solar cell, the typical value of the open-circuit voltage is 0.5-0.6V. The more electron-hole pairs that are initiated at the interface layer via illumination, the greater the current. The more light energy is received by the interface layer, the larger the interface layer, i.e., the cell area, and the larger the current composed in the solar cell.

The solar cell is manufactured mainly based on semiconductor materials, and the working principle of the solar cell is that photoelectric conversion reaction occurs after photoelectric materials absorb light energy. There are known ten kinds of semiconductor materials for manufacturing solar cells, and solar cells are classified into: (1) a silicon solar cell; (2) a battery using inorganic salt such as gallium arsenide III-V compound, cadmium sulfide, copper indium selenide and other multi-component compounds as materials; (3) a solar cell made of a functional polymer material; (4) nanocrystalline solar cells, and the like. Currently, the most mature and commercially valuable solar cell is the silicon solar cell. Generally, the light conversion efficiency of polycrystalline silicon is 6% -10% under the condition of sufficient light resources, and the light conversion efficiency of monocrystalline silicon is more than 15%.

Solar cell panel is under bad weather such as rainwater, and the surface can be corroded gradually, influences the generating efficiency, reduces life, therefore solar cell panel surface generally has the inoxidizing coating.

The area with the largest radiation energy in the solar cell panel occupies about 48% in the visible light part, the radiation energy in the ultraviolet spectrum area occupies about 8%, the radiation energy in the infrared spectrum area occupies about 44%, the solar cell can only absorb the energy in the visible light part and convert the energy into electric energy, the ultraviolet spectrum area can not perform energy conversion, and the infrared spectrum area can only convert the energy into heat.

Current solar panel uses a period after, is corroded such as rainwater, dust by bad weather easily, influences the generating efficiency, reduces life, still can increase the maintenance cost. Through the search and discovery of the existing patent documents, the utility model patent of CN201420538506 discloses a solar panel film coating device, which is used for coating a solar panel by putting the solar panel into pasty polyvinyl chloride resin liquid; however, the light transmittance is not good, and the power generation efficiency is affected.

In addition, the sunlight is the strongest at noon, the power generation effect is the best theoretically, but in actual use, the sunlight also brings temperature rise while illuminating, the temperature rise is unfavorable for photovoltaic power generation, the voltage can be reduced, meanwhile, the resistance in a circuit and the like can be improved, the current is also influenced, and the hot spot effect is caused. The film prepared by the invention covers the surface of the solar cell, so that the heat is effectively dissipated, and the hot spot effect is reduced.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a preparation method of a film for enhancing the power generation efficiency of a solar panel. The invention solves the problems that firstly, the corrosion resistance of the film is enhanced to protect the solar panel, secondly, the sunlight transmittance is good, thirdly, the heat is effectively radiated, and the hot spot effect is reduced. In the film resin composition system, the Po material has the function of corrosion prevention, and the service life of the film is long; the light transmittance of the film can be enhanced by adding specific color enhancer, heat radiator and the like, and the power generation efficiency is increased.

The purpose of the invention is realized by the following technical scheme:

the invention relates to a composition for a thin film for enhancing the power generation efficiency of a solar panel, which comprises the following components in percentage by weight:

the heat radiating agent comprises one or more of graphene oxide and white graphene; the particle size of the graphene oxide or the white graphene is 5-10 microns.

As an embodiment of the invention, the resin substrate comprises one or more of polyethylene, polypropylene, poly-1-butene and poly-4-methyl-1-pentene.

As an embodiment of the present invention, the antistatic agent includes one or more of polyoxyethylene, phosphate, and ethylene oxide derivatives.

As an embodiment of the present invention, the plasticizer includes one or more of dioctyl phthalate (DOP), dibutyl phthalate (DBP).

As one embodiment of the present invention, the color enhancer includes zinc oxide, rare earth elements Eu and Tb.

According to one embodiment of the invention, the mass ratio of zinc oxide to rare earth elements Eu and Tb in the toner is 1: 0.1-0.5.

The invention also relates to a preparation method of the composition for the film for enhancing the power generation efficiency of the solar panel, which comprises the following steps:

s1, adding the resin base material into a stirring reaction kettle, heating to 120-200 ℃, and stirring for 1-2 hours;

s2, adding the antistatic agent and the plasticizer into a reaction kettle according to the mass ratio of 1: 3-1: 15, and continuously stirring for 1-2 hours;

s3, adding a color enhancer, and cooling to 80-150 ℃;

s4, adding the heat dissipating agent, and stirring at a constant speed at 80-120 ℃;

and S5, after 0.5-1 hour, reducing the reaction temperature to 60-80 ℃, performing wire drawing forming, and shearing into resin particles.

As an embodiment of the present invention, the particle diameter of the resin particle is 1 to 1.5 mm.

As an embodiment of the present invention, in step S4, the heat dissipation agent is white graphene and graphene oxide prepared by a redox method.

The invention also relates to a preparation method of the film for enhancing the power generation efficiency of the solar panel, which comprises the following steps:

a1, mixing and melting the resin particles prepared by the preparation method of claim 7 or 8 and a common resin base material according to the proportion of 0.5-1:1-1.5, and performing extrusion casting film forming to obtain a functional film;

a2, spreading the obtained functional film on the glass surface of a solar cell piece, and heating and adhering the functional film together at 50-90 ℃ to obtain the solar panel with the film for enhancing the power generation efficiency.

As an embodiment of the present invention, the functional film has a thickness of 0.01 to 0.1 mm.

Compared with the prior art, the invention has the beneficial effects that:

1) the film base material developed by the invention adopts polyolefins, so that the cost is low firstly, and the corrosion prevention effect of the second material is good; the film can protect the solar panel and prolong the service life of the solar panel;

2) the power generation efficiency is improved, and the specific toner, the heat dissipation agent and the like are added into the developed film, so that the film has good light transmission, and can selectively filter sunlight, so that the radiation of visible light is enhanced, and the power generation efficiency is improved; especially, the addition of the color enhancer is more beneficial to the absorption and conversion of light.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic structural view of a solar panel with a film for enhancing power generation efficiency;

wherein, 1 is a back plate, 2 is a lower EVA transparent adhesive tape, 3 is a battery piece, 4 is an upper EVA transparent adhesive tape, 5 is glass, and 6 is a functional plastic film.

Detailed Description

The present invention will be described in detail with reference to examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be apparent to those skilled in the art that several modifications and improvements can be made without departing from the inventive concept. All falling within the scope of the present invention.

Example 1

The embodiment relates to preparation and application of a thin film for enhancing the power generation efficiency of a solar panel; wherein, the composition and the dosage of the composition for the film are shown in table 1, and the preparation of the film comprises the following steps:

1) adding PO polyolefin into a stirring reaction kettle, heating to 160 ℃, and stirring for 1.5 hours;

2) adding dioctyl phthalate (DOP) and polyoxyethylene into a reaction kettle, and continuously stirring for 1.5 hours;

3) adding zinc oxide, rare earth elements Eu and Tb in a mass ratio of 1:0.3:0.3 as a toner, and cooling to 110 ℃;

4) adding white graphene, and stirring at a constant speed at 100 ℃;

5) after half an hour, reducing the reaction temperature to 70 ℃, performing wire drawing forming, and shearing into resin particles with the particle size of 1.2 mm;

6) mixing and melting the resin particles and polyvinyl chloride according to a mass ratio of 1:1.2, extruding and casting to form a film, melting the resin at 180 ℃, extruding the molten film through a die orifice by utilizing inflation pressure, passing the plastic film on a primary rotating roller at a rotating speed of 25 revolutions per minute, passing a secondary rotating roller at a rotating speed of 35 revolutions per minute, stretching and forming, and winding on a third rotating roller to finish the preparation, wherein the thickness of the film is about 0.05 mm;

7) the obtained functional plastic film is flatly laid on the glass surface of a solar cell and is adhered together by heating at 70 ℃ to prepare the solar panel with the film for enhancing the power generation efficiency; as shown in fig. 1, the solar panel comprises a back plate 1, a lower EVA transparent adhesive 2, a cell sheet 3, an upper EVA transparent adhesive 4, glass 5 and a functional plastic film 6 from bottom to top.

Example 2

The embodiment relates to preparation and application of a thin film for enhancing the power generation efficiency of a solar panel; wherein, the composition and the dosage of the composition for the film are shown in table 1, and the preparation of the film comprises the following steps:

1) adding PO polyolefin into a stirring reaction kettle, heating to 120 ℃, and stirring for 2 hours;

2) adding dibutyl phthalate (DBP) and phosphate (dimeric metaphosphoric acid sodium salt (six-membered ring) and tetrameric metaphosphoric acid sodium salt in a mass ratio of 1: 1) into a reaction kettle, and continuously stirring for 2 hours;

3) adding zinc oxide, rare earth elements Eu and Tb in a mass ratio of 1:0.5:0.5 as a toner, and cooling to 80 ℃;

4) adding white graphene, and stirring at a constant speed at 80 ℃;

5) after half an hour, reducing the reaction temperature to 60 ℃, performing wire drawing forming, and shearing into resin particles with the particle size of 1 mm;

6) mixing and melting the resin particles and polyvinyl chloride according to a mass ratio of 0.5:1, extruding and casting to form a film, melting the resin at 120 ℃, extruding the molten film through a die orifice by utilizing inflation pressure, passing the plastic film on a primary rotating roller at a rotating speed of 20 revolutions per minute, passing a secondary rotating roller at a rotating speed of 30 revolutions per minute, stretching and forming, and winding on a third rotating roller to finish the preparation, wherein the thickness of the film is about 0.02 mm;

7) and (3) flatly spreading the obtained functional plastic film on the glass surface of the solar cell, and heating and adhering the film together at 50 ℃ to obtain the solar panel with the film for enhancing the power generation efficiency.

Example 3

The embodiment relates to preparation and application of a thin film for enhancing the power generation efficiency of a solar panel; wherein, the composition and the dosage of the composition for the film are shown in table 1, and the preparation of the film comprises the following steps:

1) adding PO polyolefin into a stirring reaction kettle, heating to 200 ℃, and stirring for 1 hour;

2) adding dioctyl phthalate (DOP) and polyether ester amide (one or more selected from polyether monomer, polycarboxylic acid and polyether ester amide in the embodiment, polyether ester amide is selected) into a reaction kettle, and continuously stirring for 1 hour;

3) adding zinc oxide, rare earth elements Eu and Tb in a mass ratio of 1:0.1:0.1 as a toner, and cooling to 150 ℃;

4) adding graphene oxide, and stirring at a constant speed at 120 ℃;

5) after half an hour, reducing the reaction temperature to 80 ℃, performing wire drawing forming, and shearing into resin particles with the particle size of 1.5 mm;

6) mixing and melting the resin particles and polyvinyl chloride according to a mass ratio of 1:1.5, extruding and casting to form a film, melting the resin at 220 ℃, extruding the molten film through a die orifice by utilizing inflation pressure, passing the plastic film on a primary rotating roller at a rotating speed of 30 revolutions per minute, passing a secondary rotating roller at a rotating speed of 40 revolutions per minute, stretching and forming, and winding on a third rotating roller to finish the preparation, wherein the thickness of the film is about 0.1 mm;

7) and (3) flatly spreading the obtained functional plastic film on the glass surface of the solar cell, and heating and adhering the film together at 90 ℃ to obtain the solar panel with the film for enhancing the power generation efficiency.

Example 4

The embodiment relates to preparation and application of a thin film for enhancing the power generation efficiency of a solar panel; wherein, the composition and the dosage of the composition for the film are shown in table 1, and the preparation of the film comprises the following steps:

1) adding PE polyethylene into a stirring reaction kettle, heating to 150 ℃, and stirring for 1 hour;

2) adding dibutyl phthalate (DBP) and polyoxyethylene into a reaction kettle, and continuously stirring for 2 hours;

3) adding zinc oxide, rare earth elements Eu and Tb in a mass ratio of 1:0.2:0.3 as a toner, and cooling to 120 ℃;

4) adding white graphene, and stirring at a constant speed at 90 ℃;

5) after half an hour, reducing the reaction temperature to 70 ℃, performing wire drawing forming, and shearing into resin particles with the particle size of 1 mm;

6) mixing and melting the resin particles and polyvinyl chloride according to a mass ratio of 0.8:1.2, extruding and casting to form a film, melting the resin at 200 ℃, extruding the molten film through a die orifice by utilizing inflation pressure, passing a plastic film on a primary rotating roller at a rotating speed of 25 revolutions per minute, passing a secondary rotating roller at a rotating speed of 35 revolutions per minute, stretching and forming, and winding on a third rotating roller to finish the preparation, wherein the thickness of the film is about 0.05 mm;

7) and (3) flatly spreading the obtained functional plastic film on the glass surface of the solar cell, and heating and adhering the film together at 70 ℃ to obtain the solar panel with the film for enhancing the power generation efficiency.

Comparative example 1

The comparative example relates to preparation and application of a solar panel coating; wherein, the composition and the dosage of the composition for coating are shown in table 1, and the preparation of the film comprises the following steps:

1) adding PO polyolefin into a stirring reaction kettle, heating to 160 ℃, and stirring for 1.5 hours;

2) adding dioctyl phthalate (DOP) and polyoxyethylene into a reaction kettle, and continuously stirring for 1.5 hours;

3) adding zinc oxide, rare earth elements Eu and Tb in a mass ratio of 1:0.3:0.3 as a toner, and cooling to 110 ℃;

4) adding a heat dissipating agent (carbon nano tube), and stirring at a constant speed at 100 ℃;

5) after half an hour, reducing the reaction temperature to 70 ℃, performing wire drawing forming, and shearing into resin particles with the particle size of 1.2 mm;

6) mixing and melting the resin particles and polyvinyl chloride according to a mass ratio of 1:1.2, extruding and casting to form a film, melting the resin at 180 ℃, extruding the molten film through a die orifice by utilizing inflation pressure, passing the plastic film on a primary rotating roller at a rotating speed of 25 revolutions per minute, passing a secondary rotating roller at a rotating speed of 35 revolutions per minute, stretching and forming, and winding on a third rotating roller to finish the preparation, wherein the thickness of the film is about 0.05 mm;

7) and (3) flatly spreading the obtained functional plastic film on the glass surface of the solar cell, and heating at 70 ℃ to adhere the film together to obtain the solar panel with the film.

Comparative example 2

The comparative example relates to preparation and application of a solar panel coating; wherein, the composition and the dosage of the composition for coating are shown in table 1, and the preparation of the film comprises the following steps:

1) adding PO polyolefin into a stirring reaction kettle, heating to 160 ℃, and stirring for 1.5 hours;

2) adding dioctyl phthalate (DOP) and polyoxyethylene into a reaction kettle, and continuously stirring for 1.5 hours;

3) adding rare earth elements Eu and Tb in a mass ratio of 1:1 as toner, and cooling to 110 ℃;

4) adding white graphene, and stirring at a constant speed at 100 ℃;

5) after half an hour, reducing the reaction temperature to 70 ℃, performing wire drawing forming, and shearing into resin particles with the particle size of 1.2 mm;

6) mixing and melting the resin particles and polyvinyl chloride according to a mass ratio of 1:1.2, extruding and casting to form a film, melting the resin at 180 ℃, extruding the molten film through a die orifice by utilizing inflation pressure, passing the plastic film on a primary rotating roller at a rotating speed of 25 revolutions per minute, passing a secondary rotating roller at a rotating speed of 35 revolutions per minute, stretching and forming, and winding on a third rotating roller to finish the preparation, wherein the thickness of the film is 0.05 mm;

7) and (3) flatly spreading the obtained functional plastic film on the glass surface of the solar cell, and heating at 70 ℃ to adhere the film together to obtain the solar panel with the film.

Comparative example 3

The comparative example relates to preparation and application of a solar panel coating; wherein, the composition and the dosage of the composition for coating are shown in table 1, and the preparation of the film comprises the following steps:

1) adding PO polyolefin into a stirring reaction kettle, heating to 160 ℃, and stirring for 1.5 hours;

2) adding dioctyl phthalate (DOP) and polyoxyethylene into a reaction kettle, and continuously stirring for 1.5 hours;

3) adding zinc oxide as a toner, and cooling to 110 ℃;

4) adding white graphene, and stirring at a constant speed at 100 ℃;

5) after half an hour, reducing the reaction temperature to 70 ℃, performing wire drawing forming, and shearing into resin particles with the particle size of 1.2 mm;

6) mixing and melting the resin particles and polyvinyl chloride according to a mass ratio of 1:1.2, extruding and casting to form a film, melting the resin at 180 ℃, extruding the molten film through a die orifice by utilizing inflation pressure, passing the plastic film on a primary rotating roller at a rotating speed of 25 revolutions per minute, passing a secondary rotating roller at a rotating speed of 35 revolutions per minute, stretching and forming, and winding on a third rotating roller to finish the preparation, wherein the thickness of the film is 0.05 mm;

7) and (3) flatly spreading the obtained functional plastic film on the glass surface of the solar cell, and heating at 70 ℃ to adhere the film together to obtain the solar panel with the film.

Comparative example 4

The comparative example relates to preparation and application of a solar panel coating; wherein, the composition and the dosage of the composition for coating are shown in table 1, and the preparation of the film comprises the following steps:

1) adding PO polyolefin into a stirring reaction kettle, heating to 160 ℃, and stirring for 1.5 hours;

2) adding dioctyl phthalate (DOP) and polyoxyethylene into a reaction kettle, and continuously stirring for 1.5 hours;

3) adding nano silicon dioxide as a toner, and cooling to 110 ℃;

4) adding white graphene, and stirring at a constant speed at 100 ℃;

5) after half an hour, reducing the reaction temperature to 70 ℃, performing wire drawing forming, and shearing into resin particles with the particle size of 1.2 mm;

6) mixing and melting the resin particles and polyvinyl chloride according to a mass ratio of 1:1.2, extruding and casting to form a film, melting the resin at 180 ℃, extruding the molten film through a die orifice by utilizing inflation pressure, passing the plastic film on a primary rotating roller at a rotating speed of 25 revolutions per minute, passing a secondary rotating roller at a rotating speed of 35 revolutions per minute, stretching and forming, and winding on a third rotating roller to finish the preparation, wherein the thickness of the film is 0.05 mm;

7) and (3) flatly spreading the obtained functional plastic film on the glass surface of the solar cell, and heating at 70 ℃ to adhere the film together to obtain the solar panel with the film.

Comparative example 5

The comparative example relates to preparation and application of a solar panel coating; wherein, the composition and the dosage of the composition for coating are shown in table 1, and the preparation of the film comprises the following steps:

1) adding PO polyolefin into a stirring reaction kettle, heating to 160 ℃, and stirring for 1.5 hours;

2) adding dioctyl phthalate (DOP) and polyoxyethylene into a reaction kettle, and continuously stirring for 1.5 hours;

3) adding zinc oxide, rare earth elements Eu and Tb in a mass ratio of 1:2:3 as a toner, and cooling to 110 ℃;

4) adding white graphene, and stirring at a constant speed at 100 ℃;

5) after half an hour, reducing the reaction temperature to 70 ℃, performing wire drawing forming, and shearing into resin particles with the particle size of 1.2 mm;

6) mixing and melting the resin particles and polyvinyl chloride according to a mass ratio of 1:1.2, extruding and casting to form a film, melting the resin at 180 ℃, extruding the molten film through a die orifice by utilizing inflation pressure, passing the plastic film on a primary rotating roller at a rotating speed of 25 revolutions per minute, passing a secondary rotating roller at a rotating speed of 35 revolutions per minute, stretching and forming, and winding on a third rotating roller to finish the preparation, wherein the thickness of the film is 0.05 mm;

7) and (3) flatly spreading the obtained functional plastic film on the glass surface of the solar cell, and heating at 70 ℃ to adhere the film together to obtain the solar panel with the film.

TABLE 1 Components and amounts (wt%) of film compositions for solar panel coating

Performance testing

The solar cell panels prepared in the above examples and comparative examples were tested and the results are shown in table 2.

The thin film corrosion prevention testing method comprises the following steps of irradiating by using an ultraviolet lamp until the surface of a thin film is cracked or deformed; the light transmittance performance is tested by adopting a light transmittance haze meter according to the national standard GB/T2410-2008; the generating efficiency is obtained by multiplying the current on the controller and the voltage on two sides of the battery plate, and P is U I.

TABLE 2

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.