CN218333818U - Multilayer high reflection type sealing adhesive film - Google Patents
Multilayer high reflection type sealing adhesive film Download PDFInfo
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- CN218333818U CN218333818U CN202220937554.4U CN202220937554U CN218333818U CN 218333818 U CN218333818 U CN 218333818U CN 202220937554 U CN202220937554 U CN 202220937554U CN 218333818 U CN218333818 U CN 218333818U
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Abstract
The application relates to a multilayer high reflection-type sealant film, it includes the backplate, still includes the successive layer and sets up on the backplate: the black light-tight layer is internally provided with an infrared light full-absorption region and a visible light full-absorption region; the transparent anti-infrared layer is internally provided with a visible light semi-absorption region and an infrared light semi-transmission region; the black infrared-transmitting layer is internally provided with a visible light semi-absorption region, and the surface far away from the transparent infrared layer is formed into a cell connecting surface. The power generation system has the advantage of improving power generation efficiency.
Description
Technical Field
The application relates to the field of photovoltaic power generation, in particular to a multilayer high-reflection type sealant film.
Background
Due to the support and the technical progress of national photovoltaic policies, the development of the photovoltaic industry in China is rapid in recent years, and since 2008, the yield and the output value of the photovoltaic industry exceed those of traditional photovoltaic strong countries such as Germany and Japan, and the photovoltaic industry leaps the first world. However, at present, the photoelectric conversion effect of the solar cell is difficult to improve and is always maintained between 19% and 21%, and a packaging loss still exists after the cell is packaged into a module, so how to improve the photoelectric conversion efficiency of the photovoltaic cell becomes a focus of attention of the world photovoltaic industry and an important reference of new energy industry layout of governments of various countries. The packaging losses of the assembly are manifold, including the spacing between the cells and the gaps between the cells and the edges of the assembly, and the high temperature causes the photoelectric conversion efficiency to decrease.
In the related art, the basic structure of a solar photovoltaic module is composed of 5 layers from top to bottom: the solar cell comprises upper high-transmittance photovoltaic glass, an upper EVA (ethylene vinyl acetate) adhesive film, a cell piece, a lower EVA adhesive film, a photovoltaic back panel or lower photovoltaic glass. The photovoltaic back plate is prepared from a black back plate, and almost absorbs sunlight of all wave bands due to the black appearance. When the alternate sunlight of the cell enters the lower EVA adhesive film, the alternate sunlight can irradiate the side of the photovoltaic back plate close to the cell, so that the working temperature of the assembly is easily increased excessively, and the power generation efficiency is reduced.
SUMMERY OF THE UTILITY MODEL
In order to improve the power generation efficiency, the present application provides a multilayer highly reflective sealant film.
The application provides a multilayer high reflection-type sealant film, adopts following technical scheme:
the utility model provides a multilayer high reflection-type sealant film, includes the backplate, still includes the successive layer and sets up on the backplate:
the black non-light-transmitting layer is internally provided with an infrared light full-absorption region and a visible light full-absorption region;
the transparent anti-infrared layer is internally provided with a visible light semi-absorption region and an infrared light semi-transmission region;
the black infrared-transmitting layer is internally provided with a visible light semi-absorption region, and the surface far away from the transparent infrared layer is formed into a cell connecting surface.
By adopting the technical scheme, sunlight enters the black non-light-transmitting layer, the transparent anti-infrared layer and the black light-transmitting infrared layer through the gap between the batteries, and is reflected and absorbed by the three layers for multiple times. Since the back sheet does not perform photoelectric conversion, all light irradiated on the back sheet is subjected to photothermal conversion as compared with the cell sheet, and thus the temperature of the back sheet is increased more than that of the cell sheet at the same light intensity. Therefore, in this scheme, the black opaque layer isolates infrared light and visible light to prevent sunlight from propagating to the backplate. The transparent infrared layer reduces the visible light entering the black opaque layer through reflection, and reduces the heat generated by the black opaque layer. The black infrared-transmitting layer can absorb part of light to raise the temperature, does not absorb infrared light, shares the heat absorbed by the black non-light-transmitting layer, reduces the temperature generated by the back plate and prolongs the service life. Meanwhile, part of visible light penetrates through the black infrared-transmitting layer and is absorbed by the cell piece to generate a photoelectric effect, so that the power generation efficiency is improved.
Optionally, the optical film further comprises an adhesive film, the adhesive film is arranged on the side faces of the black non-light-transmitting layer, the transparent anti-infrared layer and the black light-transmitting layer, a light diffusion region is formed in the adhesive film, a light receiving surface is formed on the outer surface of the adhesive film, and the light diffusion region is connected with the black non-light-transmitting layer, the transparent anti-infrared layer and the black light-transmitting layer.
Optionally, the light receiving surface is oriented in the same direction as the cell connection surface.
By adopting the technical scheme, the light flux of sunlight irradiating the light receiving surface is larger than the light flux of sunlight directly irradiating the black non-light-transmitting layer, the transparent anti-infrared layer and the black infrared-transmitting layer, so that the adhesive film is beneficial to more transmission of sunlight into the black non-light-transmitting layer, the transparent anti-infrared layer and the black infrared-transmitting layer.
Optionally, an infrared light full-transmission region is further formed in the black infrared-transmission layer.
Optionally, an infrared light reflecting surface and a visible light reflecting surface are formed between the black opaque layer and the transparent anti-infrared layer, and between the transparent anti-infrared layer and the black infrared transmitting layer.
By adopting the technical scheme, sunlight enters the black opaque layer, the transparent anti-infrared layer and the black infrared-transmitting layer through the gaps among the cells, and is reflected and absorbed by the three layers for multiple times. The transparent anti-infrared layer reflects part of the sun to the back of the cell piece,
drawings
FIG. 1 is a schematic view of a layer structure of a multilayer highly reflective sealant film according to an embodiment of the present application.
Description of reference numerals:
1. a back plate; 2. a black opaque layer; 3. a transparent anti-infrared layer; 4. a black infrared-transmitting layer; 5. a glue film; 6. a battery piece connecting surface; 7. a light receiving face; 8. a battery piece.
Detailed Description
The present application will be described in further detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the inventive concepts. Some of the figures in the present disclosure show structures and devices in block diagram form as part of this specification to avoid obscuring the disclosed principles. In the interest of clarity, not all features of an actual implementation are described in this specification. Moreover, the language used in the disclosure has been principally selected for readability and instructional purposes, and may not have been selected to delineate or circumscribe the inventive subject matter, resort to the claims being necessary to determine such inventive subject matter. Reference in the present disclosure to "one implementation" or "an implementation" means that a particular feature, structure, or characteristic described in connection with the implementation is included in at least one implementation, and references to "one implementation" or "an implementation" are not to be understood as necessarily all referring to the same implementation.
Unless explicitly defined otherwise, the terms "a," "an," and "the" are not intended to refer to a singular entity, but include the general class of which a particular example may be used for illustration. Thus, use of the terms "a" or "an" can mean any number of at least one, including "a," one or more, "" at least one, "and" one or more than one. The term "or" means any of the alternatives, and any combination of alternatives, including all alternatives, unless the alternatives are explicitly indicated as mutually exclusive. The phrase "at least one of," when combined with a list of items, refers to a single item in the list or any combination of items in the list. The phrase does not require all of the listed items unless explicitly so limited.
The embodiment of the application discloses a multilayer high reflection type sealant film 5. Referring to fig. 1, the multilayer highly reflective sealant film 5 includes a back plate 1, a black opaque layer 2, a transparent anti-infrared layer 3, a black infrared-transmitting layer 4 and a sealant film 5, wherein the black opaque layer 2, the transparent anti-infrared layer 3 and the black infrared-transmitting layer 4 are disposed on the back plate 1 layer by layer for absorbing and reflecting sunlight penetrating from the side, and the black infrared-transmitting layer 4 is used for connecting with a battery piece 8. The glue film 5 is arranged on the side surfaces of the black non-light-transmitting layer 2, the transparent anti-infrared layer 3 and the black infrared-transmitting layer 4 and is used for receiving sunlight and transmitting the sunlight to the black non-light-transmitting layer 2, the transparent anti-infrared layer 3 and the black infrared-transmitting layer 4.
Specifically, an infrared light total absorption region and a visible light total absorption region are formed inside the black opaque layer 2, and most of infrared light and sunlight irradiated on the black opaque layer 2 can be absorbed. In various embodiments, the thicknesses of the infrared light total absorption region and the visible light total absorption region are determined based on the material of the black opaque layer 2, and the two regions may be overlapped or not overlapped, for example, in the present embodiment, the black opaque layer 2 is made of the same material, so that the internal infrared light total absorption region and the visible light total absorption region are overlapped with each other and are all regions in the black opaque layer 2. Since the back sheet 1 does not perform photoelectric conversion, all light irradiated on the back sheet 1 is converted into light and heat as compared with the cell sheet 8, and thus the temperature of the back sheet 1 is increased more than that of the cell sheet 8 with the same light intensity. In practical use, the surface of the backboard 1 facing the air can receive the reflected light and the heat radiation of the ground, the temperature is raised by the photo-thermal conversion, and the surface facing away from the air is isolated from the sunlight and the infrared light entering from the adhesive layer through the black light-tight layer 2, so that the temperature is prevented from further rising.
Specifically, a visible light semi-absorption region and an infrared light semi-transmission region are formed inside the transparent infrared reflection layer 3, and an infrared light reflection surface and a visible light reflection surface are formed between the transparent infrared reflection layer and the black light-tight layer 2. The visible light semi-absorption region can absorb part of visible light and transmit part of infrared light. In different embodiments, the thicknesses of the visible light semi-absorption region and the infrared light semi-transmission region are determined based on the material of the transparent anti-infrared layer 3, and the two may be overlapped or not overlapped, for example, in this embodiment, the transparent anti-infrared layer 3 is made of the same material, so the inner visible light semi-absorption region and the inner infrared light semi-transmission region are overlapped with each other and are all regions in the transparent anti-infrared layer 3. In the visible light semi-absorption region, the visible light part in the sunlight is absorbed by the ground when being irradiated on the ground and is converted into infrared light emitted outwards through the black body effect, so that the infrared part contained in the sunlight is relatively low, the visible light and the infrared light are reduced by the transparent infrared layer to enter the black opaque layer 2 through reflection, and the heat generated by the black opaque layer 2 is reduced.
Specifically, a visible light semi-absorption region and an infrared light full-transmission region are formed inside the black infrared-transmitting layer 4, the surface far away from the transparent infrared layer is formed as a cell connecting surface 6, and the surface close to the transparent infrared layer and the transparent infrared-reflecting layer 3 are formed with an infrared light reflecting surface and a visible light reflecting surface. In different embodiments, the thicknesses of the visible light semi-absorption region and the infrared light full-transmission region are determined based on the material of the black infrared-transmission layer 4, and the two may be overlapped or not overlapped, for example, in this embodiment, the black infrared-transmission layer 4 is made of the same material, so the visible light semi-absorption region and the infrared light full-transmission region inside are overlapped with each other and are all regions in the black infrared-transmission layer 4. The black infrared-transmitting layer 4 can absorb part of light to raise the temperature, does not absorb infrared light, shares the heat absorbed by the black non-light-transmitting layer 2, reduces the temperature generated by the back plate 1, and prolongs the service life.
A light diffusion area is formed in the adhesive film 5, a light receiving surface 7 is formed on the outer surface of the adhesive film 5, and the light diffusion area is connected with the black light-tight layer 2, the transparent anti-infrared layer 3 and the black light-transmitting infrared layer 4. The shape of the light receiving surface may be a plane or a curved surface or a surface of another shape, but the light flux of sunlight irradiated on the light receiving surface 7 may be larger than the light flux of sunlight directly irradiated on the black opaque layer 2, the transparent anti-infrared layer 3 and the black infrared-transmitting layer 4. In this embodiment, the light receiving surface 7 is planar and oriented in the same direction as the cell connecting surface 6.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (5)
1. The multilayer high-reflection sealant film is characterized by comprising a back plate (1) and further comprising the following components arranged on the back plate (1) layer by layer:
the black light-tight layer (2) is internally provided with an infrared light full-absorption region and a visible light full-absorption region;
the transparent anti-infrared layer (3) is internally provided with a visible light semi-absorption region and an infrared light semi-transmission region;
the black infrared-transmitting layer (4) is internally provided with a visible light semi-absorption region, and one surface far away from the transparent infrared layer is formed into a cell connecting surface (6).
2. The multilayer highly reflective sealant film according to claim 1, further comprising a sealant film (5), wherein the sealant film (5) is disposed on the side of the black opaque layer (2), the transparent anti-infrared layer (3) and the black infrared-transmitting layer (4), a light diffusion region is formed in the sealant film (5), a light receiving surface (7) is formed on the outer surface of the sealant film (5), and the light diffusion region is connected to the black opaque layer (2), the transparent anti-infrared layer (3) and the black infrared-transmitting layer (4).
3. The multilayer highly reflective sealant film according to claim 2, wherein the light receiving surface (7) is oriented in the same direction as the cell connection surface (6).
4. The multilayer highly reflective sealant film according to claim 1, wherein a full infrared light transmission region is further formed in the black infrared transmitting layer (4).
5. The multilayer highly reflective sealant film according to claim 1, wherein an infrared light reflecting surface and a visible light reflecting surface are formed between the black opaque layer (2) and the transparent anti-infrared layer (3), and between the transparent anti-infrared layer (3) and the black infrared light transmitting layer (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220937554.4U CN218333818U (en) | 2022-04-21 | 2022-04-21 | Multilayer high reflection type sealing adhesive film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220937554.4U CN218333818U (en) | 2022-04-21 | 2022-04-21 | Multilayer high reflection type sealing adhesive film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218333818U true CN218333818U (en) | 2023-01-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220937554.4U Active CN218333818U (en) | 2022-04-21 | 2022-04-21 | Multilayer high reflection type sealing adhesive film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218333818U (en) |
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2022
- 2022-04-21 CN CN202220937554.4U patent/CN218333818U/en active Active
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