Novel color photovoltaic light component and preparation method thereof

Abstract

The invention discloses a novel color photovoltaic light assembly and a preparation method thereof, and the assembly comprises a backboard, a first packaging adhesive film, a back support layer, a second packaging adhesive film, a cell layer, a high-transmittance packaging adhesive film, a transparent impact-resistant layer, a semi-cured color packaging adhesive film, and a transparent packaging front layer which are sequentially stacked. And the components are laminated by a laminating machine to integrally form the novel color photovoltaic light component. According to the invention, the color photovoltaic module is prepared by manufacturing the color photovoltaic packaging adhesive film and then laminating and integrally molding the semi-cured color packaging adhesive film, the battery piece layer, the back plate and the front plate. The photovoltaic module is reasonable in structure, single visual experience of the photovoltaic module can be changed into colorful visual experience changing colors along with angles, the structural color characteristic of the photonic crystal can enable the photovoltaic module to keep color persistence and high light transmittance, the photovoltaic power generation power of the photovoltaic module is not damaged, the application field of a light module can be widened, and the photovoltaic module is worthy of popularization and application. And the application scene of the light component is enriched.

Description

Technical Field

[0001] The invention belongs to the technical field of photovoltaic components, and in particular relates to a novel colorful lightweight photovoltaic component and a preparation method thereof. Background Art

[0002] Lightweight modules have attracted more and more attention due to their light, thin and beautiful features. With the continuous development of the photovoltaic lightweight module industry, people's demand for the visual experience and beauty of lightweight modules is growing. However, the mainstream solar cell in the existing technology is dark blue in color. After the module is encapsulated, due to the superposition of the EVA layer and the FFC or CPC front plate, the photovoltaic module appears black as a whole, with a single color.

[0003] In order to enhance the visual experience of lightweight photovoltaic modules and ensure the beauty of photovoltaic modules, the prior art generally adopts printing color coatings on the front panel materials of photovoltaic modules to form patterns, thereby improving the beauty of photovoltaic modules. However, when the colors are printed on the inner or outer surface of the front panel, the light incident on the front panel will be shielded, thereby reducing the efficiency of the photovoltaic modules. In addition, during the installation stage of the photovoltaic structure in the sun room or roof, in order to ensure the beauty of the building structure, it is also necessary to install decorative building materials on the back panel or inner side of the colored photovoltaic module to ensure the beauty of the photovoltaic module. This makes the installation cost of the photovoltaic module too high and also increases the installation time. Therefore, it is imperative to develop new packaging materials to enhance people's visual experience of lightweight modules and ensure the beauty of photovoltaic modules without losing the power generation of photovoltaic modules! Summary of the invention

[0004] Purpose of the invention: In view of the problems and shortcomings in the prior art, the present invention provides a method for preparing a new type of colorful photovoltaic lightweight component, comprising the following steps:

[0005] A method for preparing a novel colored photovoltaic lightweight component comprises the following steps:

[0006] S1, making a semi-cured colored packaging film;

[0007] S2, laying a back sheet, a first packaging film, a back support layer, and a second packaging film in sequence from bottom to top on the operating table according to a stacking structure, and placing a battery layer on the laid second packaging film to complete the bus connection, wherein the battery layer includes a plurality of solar cell strings;

[0008] S3, laying a high-transparency packaging film, a transparent impact-resistant layer, the semi-cured color packaging film, and a transparent front packaging layer on the battery layer from bottom to top in sequence;

[0009] S4. The back panel, the first packaging film, the back support layer, the second packaging film, the battery layer, the high-transmittance packaging film, the transparent impact-resistant layer, the semi-cured color packaging film, and the transparent packaging front layer are laminated into one piece by a laminator to form a new color photovoltaic lightweight component.

[0010] Furthermore, the step S1 of preparing a semi-cured colored packaging film comprises:

[0011] One or more colors of photonic crystal powder are evenly sprinkled on the pre-crosslinked packaging film by using a powder sprinkling compound machine, and a semi-cured color photovoltaic packaging film is obtained through the steps of heating and melting in an oven, hot pressing, cold pressing, and winding;

[0012] Furthermore, the step S1 of preparing a semi-cured colored packaging film comprises:

[0013] The photonic crystal powder is printed on the pre-cross-linked packaging film by using a color printer to form a patterned color packaging film, and then the patterned color packaging film is heated and melted in an oven, and hot pressing, cold pressing, and winding steps are performed to obtain a semi-cured color photovoltaic packaging film.

[0014] The colors of the photonic crystal powder include: red photonic crystal powder, orange photonic crystal powder, yellow photonic crystal powder, green photonic crystal powder, cyan photonic crystal powder, blue photonic crystal powder, and purple photonic crystal powder. The photonic crystal powder is moisture and heat resistant photonic crystal powder with an average particle size of 100 to 200 μm.

[0015] The pre-crosslinked packaging film materials include: EVA, POE; the weight per unit area of ​​the packaging film ranges from 190 to 400 g / m2, and the mass ratio of the photonic crystal powder to the packaging film is 2 to 10:90 to 98.

[0016] The materials of the first packaging film, the second packaging film and the high-transparency packaging film include: EVA, POE and EPE.

[0017] The EPE is a three-layer structure of EVA / PET / EVA.

[0018] Furthermore, the material of the transparent encapsulation front layer includes: ETFE film, PVDF film, transparent CPC front plate, FFC front plate, and the light transmittance of the transparent encapsulation front layer is ≥90%.

[0019] Furthermore, the material of the transparent impact-resistant front layer includes: epoxy glass fiber prepreg, acrylic glass fiber transparent backboard, glass fiber reinforced EVA sheet, glass fiber reinforced POE sheet, transparent CPC backboard, and EPE.

[0020] Furthermore, the material of the backboard includes: CPC backboard, KPF backboard, polyolefin backboard, glass fiber reinforced polypropylene backboard, and the color of the backboard is white or black.

[0021] On the other hand, the present invention also provides a novel colorful lightweight photovoltaic component, which is prepared by the above-mentioned preparation method.

[0022] Beneficial effects:

[0023] The colors of substances are mainly divided into chemical colors and structural colors. Chemical colors are produced by pigments in substances through chromophores, while structural colors are achieved through internal microstructures. When the internal microstructure of a substance is disordered, light is mainly scattered; when the internal microstructure of a substance is orderly arranged, diffraction or interference (Bragg diffraction) mainly occurs, forming structural colors. By design, a refractive index difference is formed in the microstructure, and structural colors that vary with angle can be obtained, which are so-called rainbow colors (colorful).

[0024] Among them, photonic crystals are formed by three-dimensional orderly arrangement of microspheres. When light is incident on photonic crystals, due to the periodic structure of photonic crystals, the light diffracts or interferes, thereby reflecting light of a specific wavelength, which is Bragg reflection. At the same time, as the size of the microspheres and the distance of the lattice change, photonic crystals can reflect light from ultraviolet to infrared bands. When the reflected wavelength is within the visible light range, it can produce dazzling colors as a structural color. Compared with the colors presented by chemical pigments, the colors produced by this type of photonic crystal structure are more stable and lasting. As long as the structure itself is not destroyed, the color it presents will always be bright. At the same time, because it reflects light of a specific wavelength and does not affect the transmission of visible light, adding this type of photonic crystal pigment will not damage the power generation of photovoltaic modules.

[0025] The present invention adopts powder sprinkling or a printer to cover photonic crystal powder on a pre-crosslinked packaging film, and adopts program control to prepare a patterned packaging film, and then the packaging film covered with a specific pattern is heated and melted in an oven, and a semi-cured color photovoltaic packaging film is obtained through hot pressing, cold pressing, and winding steps. Finally, the patterned semi-cured color packaging film and a front plate, a back plate, a packaging film, and a battery layer are integrally laminated to prepare a patterned color photovoltaic lightweight component. The component can present a specific pattern without damaging the power generation of the photovoltaic component, giving people a new visual experience. At the same time, the pattern can be designed through a program to meet people's wide needs and ensure the beauty of the photovoltaic component. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of a new type of colorful photovoltaic lightweight component in an embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments.

[0028] This embodiment provides a method for preparing a colorful and flexible photovoltaic module, comprising the following steps:

[0029] S1, preparing a semi-cured colored packaging film 2;

[0030] S2, laying the back plate 9, the first packaging film 8, the back support layer 7, the second packaging film 6 in sequence from bottom to top on the operating table according to the stacking structure, and placing the battery layer 5 on the laid second packaging film to complete the bus connection, wherein the battery layer includes a plurality of solar cell strings;

[0031] S3, laying the high-transparency packaging film 4, the transparent impact-resistant layer 3, the semi-cured color packaging film 2, and the transparent packaging front layer 1 on the battery layer from bottom to top;

[0032] S4. The back panel 9, the first packaging film 8, the back support layer 7, the second packaging film 6, the battery layer 5, the high-transmittance packaging film 4, the transparent impact-resistant layer 3, the semi-cured color packaging film 2, and the transparent packaging front layer 1 are laminated into one piece by a laminator to form a new color photovoltaic lightweight component.

[0033] Preferably, the first packaging film and the second packaging film may be high cutoff films.

[0034] Furthermore, the step S1 of preparing a semi-cured colored packaging film comprises:

[0035] Using a powder-sprinkling compounding machine, one or more colors of photonic crystal powder are uniformly sprinkled on the pre-crosslinked packaging film according to a preset pattern to form a patterned color packaging film, and then heated and melted in an oven, hot pressed, cold pressed, and rolled to obtain a semi-cured color photovoltaic packaging film;

[0036] Preferably, the powder sprinkling compound machine is a powder sprinkling compound machine provided with an automatic control program, and can sprinkle powder according to the actual needs of users to generate different shapes, such as five-pointed stars, heart patterns, trademarks, etc.

[0037] Furthermore, the step S1 of preparing a semi-cured colored packaging film comprises:

[0038] Photonic crystal powder is printed on a pre-cross-linked packaging film according to a preset pattern using a color printer to form a patterned color packaging film, and then the patterned color packaging film is heated and melted in an oven, and a semi-cured color photovoltaic packaging film is obtained through hot pressing, cold pressing, and winding steps.

[0039] The colors of the photonic crystal powder include: red photonic crystal powder, orange photonic crystal powder, yellow photonic crystal powder, green photonic crystal powder, cyan photonic crystal powder, blue photonic crystal powder, and purple photonic crystal powder. The photonic crystal powder is moisture and heat resistant photonic crystal powder with an average particle size of 100 to 200 μm.

[0040] The pre-crosslinked packaging film materials include: EVA, POE; the weight per unit area of ​​the packaging film ranges from 190 to 400 g / m2, and the mass ratio of the photonic crystal powder to the packaging film is 2 to 10:90 to 98.

[0041] The materials of the first packaging film, the second packaging film and the high-transparency packaging film include: EVA, POE and EPE.

[0042] The EPE is a three-layer structure of EVA / PET / EVA.

[0043] Furthermore, the material of the transparent encapsulation front layer includes: ETFE film, PVDF film, transparent CPC front plate, FFC front plate, and the light transmittance of the transparent encapsulation front layer is ≥90%.

[0044] Furthermore, the material of the transparent impact-resistant front layer includes: epoxy glass fiber prepreg, acrylic glass fiber transparent backboard, glass fiber reinforced EVA sheet, glass fiber reinforced POE sheet, transparent CPC backboard, and EPE.

[0045] Furthermore, the material of the backboard includes: CPC backboard, KPF backboard, polyolefin backboard, glass fiber reinforced polypropylene backboard, and the color of the backboard is white or black.

[0046] On the other hand, the present invention also provides a novel colorful lightweight photovoltaic component, which is prepared by the above-mentioned preparation method.

[0047] Beneficial effects:

[0048] The present invention adopts powder sprinkling or a printer to cover photonic crystal powder on a pre-crosslinked packaging film, and adopts program control to prepare a patterned packaging film, and then the packaging film covered with a specific pattern is heated and melted in an oven, and a semi-cured color photovoltaic packaging film is obtained through hot pressing, cold pressing, and winding steps. Finally, the patterned semi-cured color packaging film and a front plate, a back plate, a packaging film, and a battery layer are integrally laminated to prepare a patterned color photovoltaic lightweight component. The component can present a specific pattern without damaging the power generation of the photovoltaic component, giving people a new visual experience. At the same time, the pattern can be designed through a program to meet people's wide needs and ensure the beauty of the photovoltaic component.

[0049] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for preparing a novel colored lightweight photovoltaic component, characterized in that: The following steps are involved: S1, making a semi-cured colored packaging film; S2, laying a back sheet, a first packaging film, a back support layer, and a second packaging film in sequence from bottom to top on the operating table according to a stacking structure, and placing a battery layer on the laid second packaging film to complete the bus connection, wherein the battery layer includes a plurality of solar cell strings; S3, laying a high-transparency packaging film, a transparent impact-resistant layer, the semi-cured color packaging film, and a transparent front packaging layer on the battery layer from bottom to top in sequence; S4. The back panel, the first packaging film, the back support layer, the second packaging film, the battery layer, the high-transmittance packaging film, the transparent impact-resistant layer, the semi-cured color packaging film, and the transparent packaging front layer are laminated into one piece by a laminator to form a new color photovoltaic lightweight component.

2. The method for preparing the novel colored photovoltaic lightweight component according to claim 1, characterized in that: The step S1 of preparing a semi-cured colored packaging film comprises: A powder sprinkling laminating machine is used to evenly sprinkle one or more colors of photonic crystal powder on the pre-crosslinked packaging film according to a preset pattern to form a patterned color packaging film, which is then heated and melted in an oven, and subjected to hot pressing, cold pressing, and winding steps to obtain a semi-cured color photovoltaic packaging film.

3. The method for preparing the novel colored photovoltaic lightweight component according to claim 1, characterized in that: The step S1 of preparing a semi-cured colored packaging film comprises: Photonic crystal powder is printed on a pre-cross-linked packaging film according to a preset pattern using a color printer to form a patterned color packaging film, and then the patterned color packaging film is heated and melted in an oven, and a semi-cured color photovoltaic packaging film is obtained through hot pressing, cold pressing, and winding steps.

4. The method for preparing a colored encapsulating adhesive film according to claim 2, characterized in that: The colors of the photonic crystal powder include: red photonic crystal powder, orange photonic crystal powder, yellow photonic crystal powder, green photonic crystal powder, cyan photonic crystal powder, blue photonic crystal powder, and purple photonic crystal powder. The photonic crystal powder is moisture and heat resistant photonic crystal powder with an average particle size of 100 to 200 μm.

5. The method for preparing a colored encapsulating film according to claim 2, characterized in that: Pre-crosslinked encapsulation film materials include: EVA, POE; the weight per unit area of ​​the encapsulation film ranges from 190 to 400 g / m 2 The mass ratio of photonic crystal powder to packaging film is 2-10:90-98.

6. The method for preparing the novel colorful photovoltaic lightweight component according to claim 1, characterized in that: The materials of the first packaging film, the second packaging film and the high-transparency packaging film include: EVA, POE and EPE.

7. The method for preparing the novel color photovoltaic module according to claim 1, characterized in that: The materials of the transparent packaging front layer include: ETFE film, PVDF film, transparent CPC front plate, FFC front plate, and the light transmittance of the transparent packaging front layer is ≥90%.

8. The method for preparing the novel colored photovoltaic lightweight component according to claim 1, characterized in that: The materials of the transparent impact-resistant front layer include: epoxy glass fiber prepreg, acrylic glass fiber transparent back plate, glass fiber reinforced EVA sheet, glass fiber reinforced POE sheet, transparent CPC back plate, and EPE.

9. The method for preparing the novel colorful photovoltaic lightweight component according to claim 1, characterized in that: The materials of the backboard include: CPC backboard, KPF backboard, polyolefin backboard, glass fiber reinforced polypropylene backboard, and the color of the backboard is white or black.

10. A new type of colorful lightweight photovoltaic module, characterized in that: The colored photovoltaic module is prepared by using the preparation method described in any one of claims 1 to 9.

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