Modulation film and solar cell panel

Abstract

The utility model relates to the technical field of solar energy, and discloses a modulation film and a solar cell panel, the modulation film is provided with a first structure and a first coating, the modulation film and the incident light of a solar cell sheet are arranged at the same side, and the advancing route of the incident light is changed through the distribution of different refractive indexes of the modulation film. Therefore, the total amount of incident light entering the solar cell is increased, the utilization efficiency of the solar cell on the incident light is improved, the photoelectric conversion efficiency of the photovoltaic module is improved, and the generating capacity is improved.

Description

TECHNICAL FIELD

[0001] The embodiment of the utility model relates to the technical field of solar energy, specifically relates to a modulation film and solar cell panel. BACKGROUND

[0002] The existing solar cell panel is out of the demand of assembly and disassembly, when laying large area solar panel, it is the scheme of splicing multiple solar cell pieces, but when splicing multiple solar cell pieces, the stability problem of welding and connection must be considered, so a certain distance gap must be set between two solar cell pieces to reserve a certain deformation activity space, the existence of gap leads to that the incident light in this area cannot be converted, with the area of the whole solar panel splicing is larger, the ratio of occupied area and converted electric energy is smaller. UTILITY MODEL CONTENT

[0003] In view of above problem, the utility model provides a kind of modulation film, to solve the technical problem of the photoelectric conversion rate of whole solar panel being influenced by splicing solar piece in prior art.

[0004] According to one aspect of the embodiment of the utility model, a kind of modulation film is provided, applied to solar assembly, the modulation film includes adhesive, substrate, first structure and first coating that are sequentially stacked;Incident light is sequentially emitted after passing through the adhesive, the substrate, the first structure and the first coating;

[0005] The solar assembly includes at least two solar cell pieces that are spaced apart;The incident light side of the modulation film is set with the solar cell piece;

[0006] The first structure is used to increase the radiation intensity of the incident light transmitted to each solar cell piece;

[0007] The first coating is used to be attached to the first structure with uniform thickness, and the refractive index of the first coating is different from the refractive index of the first structure.

[0008] In an alternative way, the modulation film further includes a second substrate disposed on the first structure;

[0009] The second substrate is attached to the first structure by a first adhesive layer, and an air cavity is formed between the first adhesive layer and the first structure;

[0010] The air cavity is used to increase the refraction angle of the transmitted light of the first structure, thereby increasing the travel length of the incident light in the modulation film, to further increase the radiation intensity of the incident light transmitted to each solar cell piece.

[0011] In an alternative mode, the modulation film further comprises a second structure and a second coating layer arranged in sequence on the first coating layer;

[0012] The second structure is configured to increase the angle of the transmitted light transmitted by the first structure.

[0013] The second coating layer is configured to be attached to the second structure with a uniform thickness, and the refractive index of the second coating layer is different from the refractive index of the second structure.

[0014] In an alternative mode, the first structure and the second structure each comprise a plurality of microstructures, and the microstructures are composed of one or more structures of a rectangle, a triangle, a semicircle, a trapezoid, a semi-ellipse, a cone, a pyramid (a quadrangular pyramid), a triangular pyramid, and a semi-ellipsoid.

[0015] In an alternative mode, when the microstructure is a rectangle, the structure period of the first structure or the second structure is 5um-80um, the width d is 3um-40um, and the height h is 3um-20um.

[0016] When the microstructure is a triangle, the structure period of the first structure or the second structure is 5um-100um, the structure width d1 is 5um-100um, and the height h1 is 5um-40um.

[0017] When the microstructure is a semicircle, the structure period of the first structure or the second structure is 3um-80um, and the radius is 3um-40um.

[0018] When the microstructure is a trapezoid, the structure period of the first structure or the second structure is 5um-100um, the top width a of the structure is 1um-20um, the bottom width b of the structure is 5um-50um, and the height h2 of the structure is 3um-30um.

[0019] When the microstructure is a semi-ellipse, the structure period of the first structure or the second structure is 5um-80um, the structure width d2 is 5um-40um, and the height h3 is 5um-30um.

[0020] When the microstructure is a cone, the structure period is 100nm-2000nm, the width d3 is 50-2000nm, and the height h4 is 100-500nm.

[0021] When the microstructure is a triangular pyramid, the structure period is 200nm-80um, the structure width d4 of the first structure 30 or the second structure 50 is 100nm-80um, and the height h5 is 100nm-70um.

[0022] When the microstructure is a quadrangular pyramid, the structure period of the first structure 30 or the second structure 50 is 3nm-80nm, the structure width d5 is 100-6000nm, and the height h6 is 100-500nm;

[0023] When the microstructure is a semi-elliptical shape, the structure period of the first structure 30 or the second structure 50 is 100nm-2000um, the structure width d6 is 50nm-2000nm, and the height h7 is 100nm-500nm.

[0024] In an alternative way, the thickness of the first coating and the thickness of the second coating are both 50nm-200nm.

[0025] In an alternative way, the material of the first coating and the material of the second coating are both any one of Al, Ag, Ni, Cu, stainless steel, ZnS, ZnO, CaF2, CoO, ZrO2, and TiO2.

[0026] In an alternative way, the material of the first structure and the material of the second structure are any one of thermal compression type, UV type, and photo-thermal dual curing type.

[0027] According to the second aspect of the embodiment of the utility model, a solar cell panel is provided, the solar cell panel includes a solar assembly and a modulation film as described above, the solar assembly includes at least two solar cell pieces arranged at intervals, and the modulation film is arranged on the same side of incident light of the solar cell pieces.

[0028] In an alternative way, the solar cell panel further includes a backboard, EVA, and transparent glass, the transparent glass, the modulation film, the solar cell pieces, and the backboard are sequentially stacked, the EVA is filled between the modulation film and the solar cell pieces, and the EVA is further arranged through the gap between the solar cell pieces and between the backboard and the solar cell pieces.

[0029] In an alternative way, the modulation film is arranged opposite the gap between the two solar cell pieces.

[0030] The utility model discloses a first structure and a first coating are set up, and the modulation film is arranged on the same side of incident light of the solar cell piece, the travel route of incident light is changed through the different refractive index distribution of modulation film, thereby increasing the total amount of incident light incident to the solar cell piece, increasing the utilization efficiency of the incident light of the solar cell piece, thereby improving the photoelectric conversion efficiency of the photovoltaic assembly, improving the power generation, and solving the technical problem that the splicing solar cell piece influences the photoelectric conversion rate of the overall solar panel in the prior art.

[0031] The above description is only a summary of the technical scheme of the embodiments of the present application, in order to more clearly understand the technical means of the embodiments of the present application, the embodiments of the present application can be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the embodiments of the present application more obvious and easy to understand, the specific embodiments of the present application are described below. BRIEF DESCRIPTION OF DRAWINGS

[0032] The drawings are only used to show the embodiments and are not considered as limiting the present application. Moreover, the same reference signs are used to represent the same parts throughout the drawings. In the drawings:

[0033] Figure 1 A structure schematic view of one embodiment of the modulation film provided by the present application is shown;

[0034] Figure 2 A structure schematic view of another embodiment of the modulation film provided by the present application is shown;

[0035] Figure 3 A structure schematic view of the microstructure of the modulation film provided by the present application is shown;

[0036] Figure 4 A light path schematic view of one embodiment of the modulation film provided by the present application is shown;

[0037] Figure 5 A light path schematic view of another embodiment of the modulation film provided by the present application is shown;

[0038] Figure 6 A light path schematic view of another embodiment of the modulation film provided by the present application is shown;

[0039] Figure 7 A light path schematic view of another embodiment of the modulation film provided by the present application is shown;

[0040] Figure 8 A structure schematic view of another embodiment of the modulation film provided by the present application is shown;

[0041] Figure 9 A structure schematic view of another embodiment of the microstructure of the modulation film provided by the present application is shown;

[0042] Figure 10 A structure schematic view of one embodiment of the solar cell panel provided by the present application is shown;

[0043] Figure 11 A structure schematic view of another embodiment of the solar cell panel provided by the present application is shown;

[0044] Figure 12A schematic diagram of another embodiment of the solar panel provided by this utility model is shown;

[0045] Figure 13 A schematic diagram of another embodiment of the solar panel provided by this utility model is shown;

[0046] Figure 14 A schematic diagram of the optical path in the solar panel provided by this utility model is shown. Detailed Implementation

[0047] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein.

[0048] This application proposes a modulation film to solve the technical problem of unstable performance of internally matched power amplifiers at low frequencies in the prior art.

[0049] In an alternative embodiment, refer to Figure 1 As shown, the modulation film applied to the solar module includes an adhesive 10, a substrate 20, a first structure 30, and a first coating 40 stacked sequentially; incident light passes through the adhesive 10, the substrate 20, the first structure 30, and the first coating 40 sequentially before exiting. The solar module includes at least two spaced-apart solar cells; the modulation film is positioned on the same side as the incident light from the solar cells.

[0050] In this structure, the first structure 30 projects incident light onto the solar cell, and the first coating 40 is attached to the first structure 30 with a uniform thickness. The refractive index of the first coating 40 is different from that of the first structure 30.

[0051] The above solution involves setting a first structure 30 and a first coating 40, and placing the modulation film on the same side as the incident light surface of the solar cell, as shown in the reference. Figure 14 As shown, the modulation film can change the direction of incident light that is missed between two solar cells and transmit it back to the solar cells. By changing the path of the incident light through the different refractive index distribution of the modulation film, the total amount of incident light on the solar cells can be increased, thereby improving the utilization efficiency of solar energy by the photovoltaic module and further increasing the radiation intensity of solar cells of the same area, thus improving the photoelectric conversion efficiency of the photovoltaic module and increasing power generation.

[0052] It should be noted that the first coating 40 serves to create a difference in refractive index between different materials. To prevent the structure from becoming filled and losing its effectiveness, it can be processed using methods such as vacuum deposition, spraying, or coating. In particular, the first coating 40 can also increase the adhesion strength between the first structure 30 and the subsequent second structure. In addition, the adhesive 10 is provided to facilitate the bonding of the film with other materials. In practice, films without adhesive 10 can also be produced separately, and the adhesive 10 can be applied during use.

[0053] During the processing of the first structure 30, the first structure 30 can be formed on the substrate 20 through three methods: hot pressing, UV pressing, and double curing pressing, by the mutual matching of materials. Among them, the hot pressing method requires the materials to have a relatively low processing temperature, such as 60-200℃. If the processing temperature is too high, the requirements for the heat resistance of other materials and the processing equipment will be higher.

[0054] In an alternative embodiment, refer to Figure 8 As shown, the modulation film also includes a second substrate 70 disposed on the first structure 30; the second substrate 70 is bonded to the first structure 30 through a first adhesive layer 80, and an air cavity 90 is formed between the first adhesive layer 80 and the first structure 30.

[0055] The air cavity 90 is formed because the fine structure of the first structure 30, such as rectangular, triangular, semi-circular, trapezoidal, or semi-elliptical, allows an air cavity to be formed between the first adhesive layer 80 and the first structure 30 when the smoothly extended first adhesive layer 80 is adhered to the first structure 30. This air cavity increases the refraction angle of the transmitted light from the first structure, thereby increasing the travel length of the incident light in the modulation film, increasing the number of incident light rays on the solar cell, and further increasing the radiation intensity of the incident light transmitted to each of the solar cells.

[0056] In an alternative embodiment, refer to Figure 2 As shown, the modulation film also includes a second structure 50 and a second coating 60 sequentially disposed on the first coating 40;

[0057] The second structure 50 is used to increase the angle of transmitted light transmitted by the first structure 30;

[0058] A second coating 60 is used to adhere to the second structure 50 with a uniform thickness, and the refractive index of the second coating 60 is different from that of the second structure 50.

[0059] Among them, reference Figures 4-7As shown, the second structure 50 is the main optical modulation structure of the optical modulation film. Its function is to transmit as much light as possible through the battery gap onto the battery. It not only needs to form a good transmission effect, but also needs to open the light at a sufficiently large angle so that it will not leak out from the gap again.

[0060] Furthermore, the second structure 50 can be processed in the following ways: through the mutual matching of materials, it can be formed on the substrate 20 by three methods: hot pressing, UV pressing, and double curing pressing. Among them, hot pressing requires the material to have a relatively low processing temperature, such as 60-200℃. If the processing temperature is too high, the requirements for the heat resistance of other materials and the processing equipment will be higher.

[0061] Optionally, both the first structure 30 and the second structure 50 include multiple microstructures, which are composed of one or more structures selected from rectangles, triangles, semicircles, trapezoids, and semi-ellipses. They can also be implemented through random graphic combinations.

[0062] Optionally, refer to Figure 3 As shown in Figure 1, when the microstructure is rectangular, the structural period of the first structure 30 or the second structure 50 is 5um-80um, the width d is 3um-40um, and the height h is 3um-20um.

[0063] Optionally, refer to Figure 3 As shown in Figure 2, when the microstructure is triangular, the structural period of the first structure 30 or the second structure 50 is 5um-100um, the structural width d1 is 5um-100um, and the height h1 is 5um-40um.

[0064] Optionally, refer to Figure 3 As shown in Figure 3, when the microstructure is semi-circular, the structural period of the first structure 30 or the second structure 50 is 3um-80um, and the radius is 3um-40um.

[0065] Optionally, refer to Figure 3 As shown in Figure 4, when the microstructure is trapezoidal, the structural period of the first structure 30 or the second structure 50 is 5um-100um, the top width a is 1um-20um, the bottom width b is 5um-50um, and the height h2 is 3um-30um.

[0066] Optionally, refer to Figure 3 As shown in Figure 5, when the microstructure is semi-elliptical, the structural period of the first structure 30 or the second structure 50 is 5um-80um, the structural width d2 is 5um-40um, and the height h3 is 5um-30um.

[0067] Optionally, refer to Figure 9As shown, the microstructure can also be an independent individual type, can be a cone, a pyramid (a four-sided pyramid), a three-sided pyramid, a semi-ellipsoid, etc.

[0068] Optionally, referring to (1) in the above table, when the microstructure is a cone, the structure period is 100nm-2000nm, the width d3 is 50-2000nm, and the height h4 is 100-500nm. Figure 9

[0069] Optionally, referring to (2) in the above table, when the microstructure is a three-sided pyramid, the structure period is 200nm-80um, the structure width d4 of the first structure 30 or the second structure 50 is 100nm-80um, and the height h5 is 100nm-70um. Figure 9

[0070] Optionally, referring to (3) in the above table, when the microstructure is a four-sided pyramid, the structure period of the first structure 30 or the second structure 50 is 3nm-80nm, the structure width d5 is 100-6000nm, and the height h6 is 100-500nm. Figure 9

[0071] Optionally, referring to (4) in the above table, when the microstructure is a semi-ellipsoid, the structure period of the first structure 30 or the second structure 50 is 100nm-2000um, the structure width d6 is 50nm-2000nm, and the height h7 is 100nm-500nm. Figure 9

[0072] Optionally, the thickness of the first coating layer 40 and the thickness of the second coating layer 60 are both 50-200nm.

[0073] Optionally, the material of the first coating layer 40 and the material of the second coating layer 60 are both any one of Al, Ag, Ni, Cu, stainless steel, ZnS, ZnO, CaF2, CoO, ZrO2, TiO2.

[0074] Optionally, the material of the first structure 30 and the material of the second structure 50 are both any one of a thermal compression type, a UV type, and a photo-thermal dual curing type.

[0075] The thermal compression type material includes polypropylene (PP), polyethylene terephthalate (PET), high-density polyethylene (HDPE), polycarbonate (PC), polymethyl methacrylate (PMMA), etc.

[0076] The UV type material includes a pre-polymer of an acrylate, a methacrylate group, an epoxy, and an allyl, etc.

[0077] ​​​​The double-curing material includes polyurethane acrylate, epoxy resin, bisphenol A epoxy resin, bisphenol F epoxy resin, glycidyl amine special epoxy resin, etc.

[0078] The application also provides a solar panel, referring to Figures 10-13 The solar panel includes a solar assembly and the above modulation film, the solar assembly includes at least two solar cell pieces arranged at intervals, and the modulation film is arranged on the same side of the incident light of the solar cell pieces.

[0079] The solar panel of the application has all the beneficial effects of the modulation film, and the details are not repeated here.

[0080] Optionally, the solar panel further includes a backboard EVA and a transparent glass, the transparent glass, the modulation film, the solar cell pieces and the backboard are sequentially stacked, the EVA is filled between the modulation film and the solar cell pieces, and the EVA also passes through the gap between the solar cell pieces and is arranged between the backboard and the solar cell pieces.

[0081] The EVA is also filled in the gap between the two solar cell pieces and adheres to the modulation film, so as to ensure that the light path is not deviated.

[0082] Optionally, referring to Figure 10 and Figure 12 The modulation film is arranged opposite to the gap between the two solar cell pieces.

[0083] At this time, the actual use area of the modulation film can be reduced according to the use requirement, and the modulation film can be arranged only in the area covered by the light transmission gap, so as to save the use cost.

[0084] In the specification provided herein, a large number of specific details are described. However, it can be understood that the embodiments of the application can be practiced without these specific details. Similarly, in order to simplify the application and help understand one or more of the various aspects of the application, in the above description of the exemplary embodiments of the application, various features of the embodiments of the application are sometimes grouped together into a single embodiment, figure or description thereof. Among them, the claims of the specific embodiment are hereby expressly incorporated into the specific embodiment, wherein each claim itself is a separate embodiment of the application.

[0085] It will be appreciated by persons skilled in the art that modules in the apparatuses in the embodiments can be adapted and placed in one or more apparatuses other than the embodiments. Modules or units or components in the embodiments can be combined into one module or unit or component, and furthermore can be divided into multiple sub-modules or sub-units or sub-components. Except that at least some of such features and / or processes or units are mutually exclusive.

[0086] It should be noted that the above-mentioned embodiments illustrate rather than limit the application, and that those skilled in the art will be able to design many alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word 'comprising' does not exclude the presence of elements or steps other than those listed in a claim. The word 'a' or 'an' preceding an element does not exclude the presence of a plurality of such elements. The application can be implemented by means of both hardware and software, and any combination thereof. In a unit claim, several devices can be listed with a comma. The use of 'first','second', 'third', etc. does not limit the number of entities. These designations can be used interchangeably. Steps in the above-described embodiments, other than those in the claims, are not necessarily to be performed in the order given.

Claims

1. A modulation film, characterized in that, The modulation film, applied to solar modules, comprises an adhesive, a substrate, a first structure, and a first coating stacked sequentially; wherein incident light passes sequentially through the adhesive, the substrate, the first structure, and the first coating before exiting. The solar module includes at least two spaced solar cells; the modulation film is disposed on the same side as the incident light of the solar cells; The first structure is used to increase the radiation intensity of the incident light transmitted to each of the solar cells; The first coating is used to adhere to the first structure with a uniform thickness, and the refractive index of the first coating is different from the refractive index of the first structure.

2. The modulation film as described in claim 1, characterized in that, The modulation film further includes a second substrate disposed on the first structure; The second substrate is bonded to the first structure through a first adhesive layer, and an air cavity is formed between the first adhesive layer and the first structure; The air cavity is used to increase the refraction angle of the transmitted light from the first structure, thereby increasing the travel length of the incident light in the modulation film, so as to further increase the radiation intensity of the incident light transmitted to each of the solar cells.

3. The modulation film as described in claim 1, characterized in that, The modulation film further includes a second structure and a second coating sequentially disposed on the first coating; The second structure is used to increase the angle of transmitted light transmitted through the first structure; The second coating is used to adhere to the second structure with a uniform thickness, and the refractive index of the second coating is different from that of the second structure.

4. The modulation film as described in claim 3, characterized in that, Both the first structure and the second structure include multiple microstructures, which are composed of one or more of the following structures: cone, square pyramid, triangular pyramid, and semi-ellipsoid.

5. The modulation film as described in claim 4, characterized in that, When the microstructure is a cone, the structural period is 100nm-2000nm, the width d3 is 50-2000nm, and the height h4 is 100-500nm; When the microstructure is a triangular pyramid, the structural period is 200nm-80um, the structural width d4 of the first structure or the second structure is 100nm-80um, and the height h5 is 100nm-70um. When the microstructure is a square pyramid, the structural period of the first structure or the second structure is 3nm-80nm, the structural width d5 ​​is 100-6000nm, and the height h6 is 100-500nm. When the microstructure is semi-elliptical, the structural period of the first or second structure is 100nm-2000um, the structural width d6 is 50nm-2000nm, and the height h7 is 100nm-500nm.

6. The modulation film as described in claim 3, characterized in that, The thickness range of both the first coating and the second coating is 50nm to 200nm.

7. The modulation film as described in claim 3, characterized in that, The material of the first coating is any one of Al, Ag, Ni, Cu, stainless steel, ZnS, ZnO, CaF2, CoO, ZrO2, and TiO2, and the material of the second coating is any one of ZnS, ZnO, CaF2, CoO, ZrO2, and TiO2.

8. The modulation film as described in claim 3, characterized in that, The materials of the first structure and the second structure are all of the following: hot-pressed, UV-cured, and photothermal dual-curing.

9. A solar panel, characterized in that, The solar panel includes a solar module and a modulation film as described in any one of claims 1-8, wherein the solar module includes at least two solar cells spaced apart; and the modulation film is disposed on the same side as the incident light of the solar cells.

10. The solar panel as claimed in claim 9, characterized in that, The solar panel also includes a backsheet, EVA, and transparent glass; the transparent glass, the modulation film, the solar cells, and the backsheet are stacked in sequence, the EVA is filled between the modulation film and the solar cells, and the EVA also passes through the gaps between the solar cells and fills the gap between the backsheet and the solar cells.

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