CN112216758B - Solar cell backboard, photovoltaic module and manufacturing method of solar cell backboard - Google Patents
Solar cell backboard, photovoltaic module and manufacturing method of solar cell backboard Download PDFInfo
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- CN112216758B CN112216758B CN202011052359.5A CN202011052359A CN112216758B CN 112216758 B CN112216758 B CN 112216758B CN 202011052359 A CN202011052359 A CN 202011052359A CN 112216758 B CN112216758 B CN 112216758B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 239000010410 layer Substances 0.000 claims description 225
- 239000000463 material Substances 0.000 claims description 68
- 238000002309 gasification Methods 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 15
- 230000008016 vaporization Effects 0.000 claims description 14
- 238000009834 vaporization Methods 0.000 claims description 13
- 239000011364 vaporized material Substances 0.000 claims description 12
- 238000007650 screen-printing Methods 0.000 claims description 3
- 239000002356 single layer Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000000576 coating method Methods 0.000 description 11
- 239000011248 coating agent Substances 0.000 description 8
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 6
- 239000007787 solid Substances 0.000 description 5
- 238000001035 drying Methods 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 239000004408 titanium dioxide Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000007669 thermal treatment Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000005083 Zinc sulfide Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- IOQPZZOEVPZRBK-UHFFFAOYSA-N octan-1-amine Chemical compound CCCCCCCCN IOQPZZOEVPZRBK-UHFFFAOYSA-N 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 229920002620 polyvinyl fluoride Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 239000005341 toughened glass Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052984 zinc sulfide Inorganic materials 0.000 description 1
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/048—Encapsulation of modules
- H01L31/049—Protective back sheets
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/054—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
- H01L31/0547—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means comprising light concentrating means of the reflecting type, e.g. parabolic mirrors, concentrators using total internal reflection
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The application relates to the technical field of solar cells, in particular to a solar cell backboard, a photovoltaic module and a manufacturing method of the solar backboard. The solar cell back sheet includes: a body portion; the film layer is arranged on the body part; wherein, the rete is equipped with hollow layer and two-layer at least reflector layer, along the thickness direction of solar cell back plate, and hollow layer is located between the reflector layer, and hollow layer and reflector layer set up in turn. The film layer can realize high reflection of visible light, namely, the visible light transmitted by the cell can be reflected by the film layer and then irradiated on the cell again, so that secondary utilization of the visible light is realized, the utilization rate of the light is improved, and further the photoelectric conversion rate of the photovoltaic module is improved.
Description
Technical Field
The application relates to the technical field of solar cells, in particular to a solar cell backboard, a manufacturing method of the solar cell backboard and a photovoltaic module.
Background
Solar energy has received increasing attention as a clean, pollution-free renewable new energy source, especially for solar power generation applications. The core component of solar power generation is a photovoltaic module, which is generally composed of a front toughened glass, a solar cell layer, a packaging material, a rear back plate and a frame. At present, the photovoltaic module still has the problem of high photoelectric conversion efficiency loss, and how to further improve the utilization rate of solar energy is a topic of great research.
Disclosure of Invention
The application provides a solar cell backboard, a photovoltaic module and a manufacturing method of the solar cell backboard, which are used for improving the power of the photovoltaic module.
A first aspect of embodiments of the present application provides a solar cell backsheet, including:
a body portion;
a membrane layer disposed on the body portion;
wherein, the rete is equipped with hollow layer and two-layer at least reflector layer, follows solar cell back plate thickness direction, hollow layer is located between the reflector layer, just hollow layer with the reflector layer sets up in turn.
In one possible design, the projection surface of the light reflecting layer covers the projection surface of the hollow layer along the thickness direction of the solar cell back panel.
In one possible design, the light reflecting layer is provided with an extending portion, the extending portion extends towards the hollow layer along the thickness direction of the solar cell back plate, and the extending portions of the adjacent light reflecting layers are connected;
the width of the extension part is 3 nm-100 nm.
In one possible design, the number of the hollow layers is set to be 1-99, and the number of the reflective layers is set to be 2-100.
In one possible design, the thickness of the single light reflecting layer is 30 nm-1000 nm;
the thickness of the single-layer hollow layer is 30 nm-1000 nm.
A second aspect of embodiments of the present application provides a photovoltaic module, including:
a battery;
the solar cell back plate is the solar cell back plate;
wherein the film layer of the solar cell backsheet is connected with the cell.
A third aspect of the embodiments of the present application provides a method for manufacturing a solar cell back sheet, where the solar cell back sheet includes a body portion, and the method includes:
arranging a reflective material on the body part to form a reflective layer;
arranging a gasification material on the reflecting layer to form a gasification material layer;
arranging a light reflecting material on the gasification material layer to form a light reflecting layer;
and removing the gasification material layer to form a hollow layer between the light reflecting layers.
In one possible design, a projection of the coating surface of the light reflecting layer covers a projection of the coating surface of the gasification material layer in the thickness direction of the solar cell back plate;
the distance between the outer edge of the gasification material layer along the circumferential direction and the outer edge of the light reflecting layer along the circumferential direction is 3 nm-100 nm;
when the body part is provided with the reflective material to form the reflective layer, the manufacturing method further comprises the following steps:
the light reflecting layer is provided with an extending part, the extending part is circumferentially positioned between the outer edge of the gasification material layer and the outer edge of the light reflecting layer, and the extending parts of the adjacent light reflecting layers are connected.
In one possible design, the gasification material layer and the light reflecting layer are repeatedly arranged, the number of layers of the gasification material layer is set to be 1-99, and the number of layers of the light reflecting layer is set to be 2-100.
In one possible design, the thickness of each light reflecting layer is 30nm to 1000 nm;
the thickness of each gasification material layer is 30 nm-1000 nm.
In one possible design, the layer of vaporized material is removed using a thermal treatment process, and the layer of vaporized material forms the hollow layer.
In one possible design, the light reflecting material and the vaporization material are applied using a screen printing process.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
FIG. 1 is a schematic structural view of a solar cell backsheet provided herein in one embodiment;
FIG. 2 is a schematic structural diagram of a process for manufacturing a solar cell back sheet provided in the present application;
fig. 3 is a schematic view of light entering a film layer provided in the present application.
Reference numerals:
1-a solar cell backsheet;
11-a body portion;
12-a film layer;
121-hollow layer;
122-a light-reflective layer;
122 a-an extension;
13-layer of gasification material.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
Detailed Description
For better understanding of the technical solutions of the present application, the following detailed descriptions of the embodiments of the present application are provided with reference to the accompanying drawings.
It should be understood that the embodiments described are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be noted that the terms "upper", "lower", "left", "right", and the like used in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element.
The embodiment of the application provides a photovoltaic module, and photovoltaic module includes battery, glued membrane and solar cell backplate 1, and solar cell backplate 1 sets up in the one side of battery dorsad sun, plays protection and supporting role to the battery, and battery and solar cell backplate 1 pass through glued membrane and connect.
As shown in fig. 1, the solar cell back sheet 1 includes a body portion 11 and a film layer 12, and the film layer 12 is disposed on the body portion 11. The film layer 12 is provided with a hollow layer 121 and at least two reflective layers 122, the hollow layer 121 is located between the reflective layers 122 along the thickness direction Z of the solar cell back panel 1, and the hollow layer 121 and the reflective layers 122 are alternately arranged. The film layer 12 of the solar cell back sheet 1 is connected to the cell.
In this embodiment, the solar cell back panel 1 includes the film layer 12, and the film layer 12 can realize high reflection of visible light, that is, the visible light transmitted by the cell can be reflected by the film layer 12 and then irradiated on the cell again, so as to realize secondary utilization of the visible light, improve the utilization rate of the light, and further improve the photoelectric conversion rate of the photovoltaic module. The film layer 12 is provided with a reflecting layer 122 and a hollow layer 121, the reflecting layer 122 is at least provided with two layers, the hollow layer 121 is arranged between the reflecting layers 122, and the reflecting light can be enhanced through the alternate arrangement of the reflecting layer 122 and the hollow layer 121. The reflective layer 122 is made of a high refractive index material (refractive index greater than 1.2), such as titanium dioxide and zinc sulfide, and the hollow layer 121 is an air layer.
Specifically, as shown in fig. 3, two reflective layers 122 and one hollow layer 121 form four interfaces, i.e., an interface a, an interface b, an interface c, and an interface d. Ray 0 ' is the incident ray and rays 1 ', 2 ', 3 ' and 4 ' are the reflected rays. Light reflects from interface a: the light ray 1 'enters the optically dense medium (titanium dioxide) from the optically thinner medium (air), half-wave loss exists, and the phase difference of the half-wave loss and the light ray 0' is pi; ray 2' reflects from interface b: taking the light ray 1 ' as a reference object, the light ray 2 ' enters the light-thinning medium (air) from the optically dense medium (titanium dioxide) without half-wave loss, so that the phase difference between the light ray 1 ' and the light ray 2 ' is 0, namely the phase difference between the light ray 2 ' and the light ray 0 is pi. Similarly, ray 3 ' and ray 4 ' are 2 π out of phase with ray 0 '. Therefore, the reflected light is enhanced after the light rays 1 'to 4' are superimposed.
Moreover, the film layer 12 can also reduce the reflectivity of near infrared light and infrared light, and because the near infrared light and the infrared light have heat radiation, the temperature of the battery can be increased when the battery is irradiated, namely, the film layer 12 is arranged, so that the working temperature of the photovoltaic module can be effectively reduced, and the service life of the photovoltaic module is prolonged.
Further, the body 11 may be made of glass, a polyvinyl fluoride composite film back sheet (TPT back sheet), a polyethylene terephthalate back sheet (PET back sheet), a polyamide back sheet, or the like.
As shown in fig. 1, in one possible design, the projection surface of the light reflecting layer 122 covers the projection surface of the hollow layer 121 in the thickness direction Z of the solar battery back sheet 1. The light-reflecting layer 122 has an extending portion 122a, the extending portion 122a extends toward the hollow layer 121 along the thickness direction Z of the solar cell back sheet 1, and the extending portions 122a of adjacent light-reflecting layers 122 are connected. In this embodiment, along the thickness direction Z of the solar cell back panel 1, the projection surface of the light reflecting layer 122 is larger than the projection surface of the hollow layer 121, so that a certain distance is provided between the outer edge of the hollow layer 121 and the outer edge of the light reflecting layer 122, and the extending portion 122a of the light reflecting layer 122 arranged along the circumferential direction thereof can extend toward the hollow layer 121 and is arranged between the outer edge of the hollow layer 121 and the outer edge of the light reflecting layer 122. The extending portion 122a connects the adjacent reflective layers 122, and supports the reflective layers 122, so that a gap is formed between the adjacent reflective layers 122, and the hollow layer 121 can be disposed.
Wherein the width of the extension portion 122a is 3nm to 100 nm. For example, the width of the extension portion 122a may be 3nm, 10nm, 50nm, 100nm, etc.
Specifically, if the width of the extension portion 122a is too small (e.g., less than 3nm), the extension portion 122a may not support the corresponding light-reflecting layer 122 enough to cause the collapse of the light-reflecting layer 122; if the width of the extension portion 122a is too large (e.g., greater than 100nm), the area of the hollow layer 121 is too small, so that part of the light cannot pass through the hollow layer 121. Therefore, when the width of the extension portion 122a is 3nm to 100nm, the extension portion 122a can support the light reflecting layer 122, and does not occupy too much space of the hollow layer 121.
In one possible design, the number of layers of the hollow layer 121 is set to 1 to 99, and the number of layers of the reflective layer 122 is set to 2 to 100. For example, the number of hollow layers 121 may be 12, 24, 36, etc., and the number of light-reflecting layers 122 may be 13, 25, 37, etc.
In one possible design, the thickness of the single light-reflecting layer 122 is 30nm to 1000 nm; the thickness of the single-layer hollow layer 121 is 30nm to 1000 nm. For example, the single-layered light reflecting layer 122 may have a thickness of 100nm, 200nm, 400nm, etc., and the single-layered hollow layer 121 may have a thickness of 100nm, 200nm, 400nm, etc.
The embodiment of the present application further provides a manufacturing method of a solar cell back panel 1, in which a film layer 12 is manufactured by the manufacturing method, as shown in fig. 2, the manufacturing method includes:
step S1: providing a light reflecting material on the body portion 11 to form a light reflecting layer 122;
step S2: disposing a vaporization material on the reflective layer 122 to form a vaporization material layer 13;
step S3: disposing a light reflecting material on the vaporizing material layer 13 to form a light reflecting layer 122;
step S4: repeating the steps S2 and S3;
step S5: the vaporization material layer 13 is removed to form a hollow layer 121 between the light reflecting layers 122.
The film layers 12 in which the light reflecting layer 122 and the hollow layer 121 are alternately provided are formed on the main body 11 in the steps S1 to S5.
The specific process of the manufacturing method can be as follows: cleaning the body part 11 by adopting clean water, ethanol and the like, and cleaning for 3-5 times to clean impurities on the body part 11; then coating a layer of reflective material on the body 11 to form a reflective layer 122, and drying the reflective layer 122 at 60 ℃ to make the reflective layer 122 solid; then coating a layer of gasification material on the solid reflecting layer 122 to form a gasification material layer 13, and drying the gasification material layer 13 at 60 ℃ to make the gasification material layer 13 solid; then coating a layer of reflective material on the solid gasification material layer 13 to form a reflective layer 122, and drying the reflective layer 122 at 60 ℃ to make the reflective layer 122 solid; finally, the thermal treatment process is used to remove the gasification material layer 13, so that the gasification material is gasified by the high temperature (e.g. 450 ℃) to form the hollow layer 121 on the gasification material layer 13.
If a plurality of alternately arranged reflective layers 122 and hollow layers 121 are required, the steps of coating the vaporized material on the reflective layer 122 to form the vaporized material layer 13 and coating the reflective material on the vaporized material layer 13 to form the reflective layer 122 may be repeated, so that the last layer is the reflective layer 122.
Further, the reflective material and the vaporization material may be coated using a screen printing process, by which a pattern, an area, a thickness, a pattern, etc. of the reflective material and the vaporization material during the coating process may be limited. Alternatively, the reflective material and the vaporization material may be directly applied by hand. The embodiment does not limit the coating method and process of the reflective material and the vaporization material.
The gasification material may be carbon, octylamine, or the like, which is easily gasified at high temperature.
As shown in fig. 2, in one possible design, in the thickness direction Z of the solar battery back sheet 1, a projection of the coated face of the light reflecting layer 122 covers a projection of the coated face of the vaporization material layer 13; the distance between the outer edge of the gasification material layer 13 along the circumferential direction and the outer edge of the light reflecting layer 122 along the circumferential direction is 3 nm-100 nm; when the reflective material is disposed on the main body 11 to form the reflective layer 122, the manufacturing method further includes: the light reflecting layer 122 is provided with an extending portion 122a, the extending portion 122a is circumferentially located between the outer edge of the gasification material layer 13 and the outer edge of the light reflecting layer 122, and the extending portions 122a of the adjacent light reflecting layers 122 are connected. In this embodiment, when the vaporized material is coated on the reflective layer 122, the coating area of the vaporized material is controlled to be smaller than the area of the reflective layer 122, so that the distance between the outer edge of the formed vaporized material layer 13 and the outer edge of the reflective layer 122 is set to be 3nm to 100nm, and when the reflective material is coated on the vaporized material layer 13, a part of the reflective material is coated on the outer edge of the vaporized layer to form an extension portion 122a of the reflective layer 122, so that when the vaporized material is vaporized, the reflective layer 122 is supported by the extension portion 122 a.
In one possible design, the number of layers of the gasification material layer 13 is set to 1 to 99, and the number of layers of the reflective layer 122 is set to 2 to 100. For example, the number of vaporization material layers 13 may be 12, 24, 36, etc., and the number of light-reflecting layers 122 may be 13, 25, 37, etc.
In one possible design, the thickness of each light reflecting layer 122 is 30nm to 1000 nm; the thickness of each gasification material layer 13 is 30nm to 1000 nm. For example, the thickness of the single light reflecting layer 122 may be 100nm, 200nm, 400nm, etc., and the thickness of the single vaporization material layer 13 may be 100nm, 200nm, 400nm, etc.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (12)
1. A solar cell backsheet, characterized in that the solar cell backsheet (1) comprises:
a body section (11);
a film layer (12), the film layer (12) being disposed on the body portion (11);
the film layer (12) is provided with a hollow layer (121) and at least two reflecting layers (122), the hollow layer (121) is located between the reflecting layers (122) along the thickness direction (Z) of the solar cell back plate (1), and the hollow layer (121) and the reflecting layers (122) are alternately arranged;
the light reflecting layer (122) is provided with an extending portion (122a), the extending portion (122a) extends towards the hollow layer (121) along the thickness direction (Z) of the solar cell backboard (1), and the extending portions (122a) of the adjacent light reflecting layers (122) are connected.
2. The solar-cell backsheet according to claim 1, wherein a projection surface of the light-reflecting layer (122) covers a projection surface of the hollow layer (121) in a thickness direction (Z) of the solar-cell backsheet (1).
3. The solar cell backsheet according to claim 1, wherein the width of the extension portion (122a) is 3nm to 100 nm.
4. The solar cell backsheet according to any one of claims 1 to 3, wherein the number of the hollow layers (121) is set to 1 to 99, and the number of the light reflecting layers (122) is set to 2 to 100.
5. The solar cell backsheet according to any one of claims 1 to 3, wherein the thickness of the single light reflecting layer (122) is 30nm to 1000 nm;
the thickness of the single-layer hollow layer (121) is 30 nm-1000 nm.
6. A photovoltaic module, comprising:
a battery;
a solar cell backsheet (1), the solar cell backsheet (1) being the solar cell backsheet (1) according to any one of claims 1 to 5;
wherein the film layer (12) of the solar cell backsheet (1) is connected with the cell.
7. A method for manufacturing a solar battery back sheet, characterized in that the solar battery back sheet (1) includes a body portion (11), the method comprising:
arranging a light reflecting material on the body part (11) to form a light reflecting layer (122);
disposing a vaporized material on the light-reflecting layer (122) to form a vaporized material layer (13);
arranging a light reflecting material on the gasification material layer (13) to form a light reflecting layer (122);
and removing the gasification material layer (13) to form a hollow layer (121) between the light reflecting layers (122).
8. The method for manufacturing a solar battery back sheet according to claim 7, wherein a projection of the coated surface of the light reflecting layer (122) covers a projection of the coated surface of the gasification material layer (13) in a thickness direction (Z) of the solar battery back sheet (1);
the distance between the outer edge of the gasification material layer (13) along the circumferential direction and the outer edge of the light reflecting layer (122) along the circumferential direction is 3 nm-100 nm;
when a reflective material is disposed on the main body (11) to form a reflective layer (122), the manufacturing method further includes:
the light reflecting layer (122) is provided with an extending part (122a), the extending part (122a) is circumferentially positioned between the outer edge of the gasification material layer (13) and the outer edge of the light reflecting layer (122), and the extending part (122a) of the adjacent light reflecting layer (122) is connected.
9. The method for manufacturing the solar cell back sheet according to claim 7, wherein the gasification material layer (13) and the light reflecting layer (122) are repeatedly disposed, the number of layers of the gasification material layer (13) is set to 1 to 99, and the number of layers of the light reflecting layer (122) is set to 2 to 100.
10. The method for manufacturing a solar cell back sheet according to claim 7, wherein the thickness of each of the light reflecting layers (122) is 30nm to 1000 nm;
the thickness of each gasification material layer (13) is 30 nm-1000 nm.
11. The method for manufacturing a solar cell back sheet according to claim 7, wherein the vaporization material layer (13) is removed by a heat treatment process, and the hollow layer (121) is formed by the vaporization material layer (13).
12. The method for manufacturing a solar cell back sheet according to claim 7, wherein the light reflecting material and the gasification material are applied by a screen printing process.
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| CN202011052359.5A CN112216758B (en) | 2020-09-29 | 2020-09-29 | Solar cell backboard, photovoltaic module and manufacturing method of solar cell backboard |
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| CN112216758B true CN112216758B (en) | 2022-06-10 |
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| WO2019214061A1 (en) * | 2018-05-08 | 2019-11-14 | 北京汉能光伏投资有限公司 | Solar cell module and solar photoelectric curtain wall |
| CN108831940A (en) * | 2018-06-13 | 2018-11-16 | 晶科能源科技（海宁）有限公司 | Improve the photovoltaic module and preparation method thereof of Reflecting backboard |
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| CN106324736A (en) * | 2016-11-02 | 2017-01-11 | 安徽中益新材料科技有限公司 | Efficient self-cleaning energy-storage illuminating light reflection film |
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