Colorful soft photovoltaic module and preparation method thereof

Abstract

The invention discloses a colored soft photovoltaic module and a preparation method thereof. Comprising a transparent packaging front layer, a third high-transmittance packaging adhesive film, a color packaging adhesive film with a preset pattern, a second high-transmittance packaging adhesive film, an anti-impact layer, a first high-transmittance packaging adhesive film, a solar cell group, a first high-cut-off packaging adhesive film, a back supporting layer, a second high-cut-off packaging adhesive film and a back plate which are sequentially stacked and integrally formed through lamination of a laminating machine. According to the invention, the photonic crystal color packaging adhesive films with different colors and different shapes are cut through the preset pattern laser, then the preset pattern is spliced, and the cutting gaps are covered with the high-transmittance packaging adhesive film, so that the patterning and colorization of the photovoltaic module are realized; the defect that the photonic crystal powder cannot be made into color ink for color printing is overcome, the structural color characteristic of the photonic crystal enables the photovoltaic module to keep color persistence and high light transmittance, the photovoltaic power generation power of the photovoltaic module is not damaged, and the requirement of people for diversification of the photovoltaic module can be met.

Description

Technical Field

[0001] The present invention belongs to the technical field of photovoltaic modules, and in particular relates to a colorful and soft photovoltaic module and a preparation method thereof. Background Art

[0002] Soft photovoltaic modules have attracted more and more attention due to their soft, thin and beautiful features. With the continuous development of soft photovoltaic modules, people's demand for their color and visual experience is also increasing day by day. However, the mainstream cells currently used are mostly monocrystalline silicon cells, which are light blue and dark blue in color. After packaging, the color is black. The color is single, and it is impossible to prepare patterned soft photovoltaic modules, which seriously restricts the development of soft photovoltaic modules.

[0003] 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, since 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. However, the average particle size of photonic crystals is between 100 and 200 um, and there is no way to make photonic crystal inks for pattern printing. Therefore, it is imperative to find a way to achieve patterning and colorization of soft photovoltaic modules without damaging the power of soft 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 colorful and flexible photovoltaic module.

[0005] The details are as follows:

[0006] A method for preparing a colorful and flexible photovoltaic module comprises the following steps:

[0007] S1 converts a preset pattern P into a contour image Q through corresponding software, where P consists of N different colors, and N is a positive integer greater than or equal to 2;

[0008] S2 presets N pieces of original packaging films, the colors of the N pieces of original packaging films correspond one-to-one to P and N different colors respectively;

[0009] S3 cuts N pieces of original packaging films into small pieces of packaging films M according to the contour image Q and N different colors;

[0010] S4: assembling the small pieces of packaging film M into a pattern film identical to the preset pattern P;

[0011] S5: laying a back sheet, a first high-cutoff packaging film, a back support layer, and a second high-cutoff 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 high-cutoff packaging film to complete a bus connection, wherein the battery layer includes a plurality of solar cell strings;

[0012] S6: laying the first high-transparency packaging film, the impact-resistant layer, the second high-transparency packaging film, the pattern film, the third high-transparency packaging film, and the transparent front packaging layer on the battery layer from bottom to top;

[0013] S7 uses a laminator to laminate the back panel, the first high-cutoff packaging film, the back support layer, the second high-cutoff packaging film, the battery layer, the first high-transmittance packaging film, the impact-resistant layer, the second high-transmittance packaging film, the pattern film, the third high-transmittance packaging film, and the transparent packaging front layer into a colorful and soft photovoltaic module.

[0014] Furthermore, the material of the original packaging film includes any one of the following: EVA, POE, EPE, and the original packaging film uses photonic crystal powder as a pigment with a light transmittance of ≥85%.

[0015] Furthermore, in S3, laser cutting is used to cut the N pieces of original packaging films into small pieces of packaging films M according to the contour image Q and the N different colors.

[0016] Furthermore, the frequency of the laser cutting is 60-65 Hz, the power is 20-50 W, and the cutting speed is 100-150 mm / s.

[0017] Furthermore, the material of the original packaging film, the first, second and third high-transmittance packaging films, the first high-cutoff packaging film and the second high-cutoff packaging film includes any one of the following: EVA, POE, EPE.

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

[0019] Furthermore, the impact-resistant layer includes any one of the following: epoxy glass fiber prepreg, acrylic glass fiber transparent backboard, transparent CPC backboard.

[0020] Furthermore, the material of the back support layer and the back panel includes any one of the following: PCB, CPC, KPF, polyolefin, glass fiber reinforced polypropylene, and the color of the back support layer and the back panel includes any one of the following: white, black.

[0021] On the other hand, the present invention further provides a color photovoltaic module, which is prepared by using the above preparation method.

[0022] Beneficial effects:

[0023] The present invention cuts photonic crystal color packaging films of different colors and shapes through a preset pattern laser, then assembles them into a preset pattern, and covers the cut gaps with a high-transmittance packaging film to achieve patterning and colorization of photovoltaic modules, thereby overcoming the disadvantage that photonic crystal powder cannot be made into color ink for color printing. In addition, the structural color characteristics of photonic crystals can enable photovoltaic modules to maintain color durability and high light transmittance without damaging the photovoltaic power generation power of the photovoltaic modules, thereby meeting people's diverse needs for photovoltaic modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of a colorful and flexible photovoltaic assembly in an embodiment of the present invention. DETAILED DESCRIPTION

[0025] 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.

[0026] This embodiment provides a method for preparing a colorful and flexible photovoltaic module, comprising the following steps:

[0027] A method for preparing a colorful and flexible photovoltaic module comprises the following steps:

[0028] S1 converts a preset pattern P into a contour image Q through corresponding software, where P consists of N different colors, and N is a positive integer greater than or equal to 2;

[0029] S2 presets N pieces of original packaging films, the colors of the N pieces of original packaging films correspond one-to-one to P and N different colors respectively;

[0030] Preferably, the correspondence here may be the same.

[0031] S3 cuts N pieces of original packaging films into small pieces of packaging films M according to the contour image Q and N different colors;

[0032] S4: assembling the small pieces of packaging film M into a pattern film identical to the preset pattern P;

[0033] S5: laying a back sheet, a first high-cutoff packaging film, a back support layer, and a second high-cutoff 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 high-cutoff packaging film to complete a bus connection, wherein the battery layer includes a plurality of solar cell strings;

[0034] S6: laying the first high-transparency packaging film, the impact-resistant layer, the second high-transparency packaging film, the pattern film, the third high-transparency packaging film, and the transparent front packaging layer on the battery layer from bottom to top;

[0035] S7 The back sheet 111, the first high cutoff encapsulation film 110, the back support layer 109, the second high cutoff encapsulation film 108, the cell layer 107, the first high-transmittance encapsulation film 106, the impact-resistant layer 105, the second high-transmittance encapsulation film 104, the pattern film 103, the third high-transmittance encapsulation film 102, and the transparent encapsulation front layer 101 are laminated and integrated into a colorful and soft photovoltaic module, such as Figure 1 shown.

[0036] Furthermore, the material of the original packaging film includes any one of the following: EVA, POE, EPE, and the original packaging film uses photonic crystal powder as a pigment with a light transmittance of ≥85%.

[0037] The EPE is a three-layer structure of EVA / POE / EVA.

[0038] Furthermore, in S3, laser cutting is used to cut the N pieces of original packaging films into small pieces of packaging films M according to the contour image Q and the N different colors.

[0039] Furthermore, the frequency of the laser cutting is 60-65 Hz, the power is 20-50 W, and the cutting speed is 100-150 mm / s.

[0040] Furthermore, the material of the original packaging film, the first, second and third high-transmittance packaging films, the first high-cutoff packaging film and the second high-cutoff packaging film includes any one of the following: EVA, POE, EPE.

[0041] Furthermore, the transparent encapsulation front layer includes any one of the following: ETFE film, PVDF film, transparent CPC front plate, and the light transmittance of the transparent encapsulation front layer is ≥90%.

[0042] Furthermore, the impact-resistant layer includes any one of the following: epoxy glass fiber prepreg, acrylic glass fiber transparent backboard, transparent CPC backboard.

[0043] Furthermore, the material of the back support layer and the back panel includes any one of the following: PCB, CPC, KPF, polyolefin, glass fiber reinforced polypropylene, and the color of the back support layer and the back panel includes any one of the following: white, black.

[0044] On the other hand, the present invention also provides a color photovoltaic module, which is prepared by the above-mentioned preparation method. Figure 1 shown.

[0045] Beneficial effects:

[0046] The present invention cuts photonic crystal color packaging films of different colors and shapes through a preset pattern laser, then assembles them into a preset pattern, and covers the cut gaps with a high-transmittance packaging film to achieve patterning and colorization of photovoltaic modules, thereby overcoming the disadvantage that photonic crystal powder cannot be made into color ink for color printing. In addition, the structural color characteristics of photonic crystals can enable photovoltaic modules to maintain color durability and high light transmittance without damaging the photovoltaic power generation power of the photovoltaic modules, thereby meeting people's diverse needs for photovoltaic modules.

[0047] This solution can also be applied to the field of shared bicycles.

[0048] 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 colorful and flexible photovoltaic module, characterized in that: The following steps are involved: S1 converts a preset pattern P into a contour image Q through corresponding software, where P consists of N different colors, and N is a positive integer greater than or equal to 2; S2 presets N pieces of original packaging films, the colors of the N pieces of original packaging films correspond one-to-one to P and N different colors respectively; S3 cuts N pieces of original packaging films into small pieces of packaging films M according to the contour image Q and N different colors; S4: splicing the small pieces of packaging film M into a pattern film that is the same as the preset pattern P; S5: laying a back sheet, a first high-cutoff packaging film, a back support layer, and a second high-cutoff 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 high-cutoff packaging film to complete a bus connection, wherein the battery layer includes a plurality of solar cell strings; S6: laying the first high-transparency packaging film, the impact-resistant layer, the second high-transparency packaging film, the pattern film, the third high-transparency packaging film, and the transparent front packaging layer on the battery layer from bottom to top; S7 uses a laminator to laminate the back panel, the first high-cutoff packaging film, the back support layer, the second high-cutoff packaging film, the battery layer, the first high-transmittance packaging film, the impact-resistant layer, the second high-transmittance packaging film, the pattern film, the third high-transmittance packaging film, and the transparent packaging front layer into a colorful and soft photovoltaic module.

2. The method for preparing a colorful and flexible photovoltaic module according to claim 1, characterized in that: The material of the original packaging film includes any one of the following: EVA, POE, EPE. The original packaging film uses photonic crystal powder as a pigment, and the light transmittance is ≥85%.

3. The method for preparing a colorful and flexible photovoltaic module according to claim 1, characterized in that: In S3, laser cutting is used to cut N pieces of original packaging films into small pieces of packaging films M according to the contour image Q and N different colors.

4. The method for preparing a colorful and flexible photovoltaic module according to claim 1, characterized in that: The frequency of the laser cutting is 60-65 Hz, the power is 20-50 W, and the cutting speed is 100-150 mm / s.

5. The method for preparing a colorful and flexible photovoltaic module according to claim 1, characterized in that: The materials of the original packaging film, the first, second and third high-transmittance packaging films, the first high-cutoff packaging film and the second high-cutoff packaging film include any one of the following: EVA, POE, EPE.

6. The method for preparing a colorful and flexible photovoltaic module according to claim 1, characterized in that: The transparent encapsulation front layer comprises any one of the following: ETFE film, PVDF film, transparent CPC front plate, and the light transmittance of the transparent encapsulation front layer is ≥90%.

7. The method for preparing a colorful and flexible photovoltaic module according to claim 1, characterized in that: The impact-resistant layer comprises any one of the following: epoxy glass fiber prepreg, acrylic glass fiber transparent back sheet, transparent CPC back sheet.

8. The method for preparing a colorful and flexible photovoltaic module according to claim 1, characterized in that: The material of the back support layer and the back panel includes any one of the following: PCB, CPC, KPF, polyolefin, glass fiber reinforced polypropylene, and the color of the back support layer and the back panel includes any one of the following: white, black.

9. A colorful and soft photovoltaic module, characterized in that: The colorful and flexible photovoltaic module is prepared by using the preparation method described in any one of claims 1 to 8.

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