CN110634982A - Light-reflecting unidirectional transmission film layer, photovoltaic module and preparation method of photovoltaic module - Google Patents
Light-reflecting unidirectional transmission film layer, photovoltaic module and preparation method of photovoltaic module Download PDFInfo
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- CN110634982A CN110634982A CN201910850446.6A CN201910850446A CN110634982A CN 110634982 A CN110634982 A CN 110634982A CN 201910850446 A CN201910850446 A CN 201910850446A CN 110634982 A CN110634982 A CN 110634982A
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- 239000005020 polyethylene terephthalate Substances 0.000 claims description 8
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- 238000010030 laminating Methods 0.000 claims description 7
- 238000001723 curing Methods 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 6
- 239000012780 transparent material Substances 0.000 claims description 6
- 238000003848 UV Light-Curing Methods 0.000 claims description 4
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- 238000003466 welding Methods 0.000 description 7
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- 230000000149 penetrating effect Effects 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
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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
-
- 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
- H01L31/0543—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 refractive type, e.g. lenses
-
- 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
- H01L31/04—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
- H01L31/056—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means the light-reflecting means being of the back surface reflector [BSR] type
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/52—PV systems with concentrators
Abstract
The invention relates to a light-reflecting unidirectional transmission film layer, a photovoltaic module and a preparation method thereof. The photovoltaic module packaging materials are sequentially stacked and laminated, so that the photovoltaic module with the functions of reflecting light to the sunny side and transmitting light to the non-sunny side can be prepared, sunlight can be better reduced to penetrate through the photovoltaic module, and meanwhile light rays on the back side of the photovoltaic module can be utilized more.
Description
Technical Field
The invention belongs to the technical field of solar photovoltaic modules, and particularly relates to a reflective unidirectional transmission film layer, a photovoltaic module and a preparation method thereof.
Background
The double-sided module can utilize ground emission light on the back of the photovoltaic module and scattered light of air to provide module power generation, and large-scale application is achieved. For a single-sided assembly, the back cover plate of a double-sided photovoltaic assembly is generally changed from a white back cover plate to transparent glass or a transparent organic back plate, so that the back surface of the double-sided battery can receive light rays from the back surface of the photovoltaic assembly.
By adopting the photovoltaic module with the structure, light rays directly pass through the gaps of the battery pieces, and the area of the part is about more than 3% of the area of the module, which means that 3% of direct light rays are wasted; meanwhile, part of light can pass through the double-sided solar cell, and the part of light is wasted by directly passing through the photovoltaic module.
Some double-sided photovoltaic modules attempt to apply a reflective material between the cells to reflect light back into the module for reuse. But 1) considering process errors, the coverage area of the reflective material needs to exceed the cell gaps to completely cover the gaps, which means that the back of part of the double-sided battery is covered by the reflective material, and the part of the back battery cannot generate electricity; 2) the light passing through the bifacial solar cell is still not utilized.
Aiming at the problems of the double-sided photovoltaic module, the invention aims to introduce the light-reflecting one-way transmission film, and the film can reflect incident light on the sunny side back to the interior of the photovoltaic module, and directly transmit incident light on the non-sunny side into the interior of the photovoltaic module. Therefore, not only the reflected light and the scattered light on the back surface of the photovoltaic module are utilized, but also the direct light at the position of the battery gap and the light rays passing through the double-sided battery are utilized, and the power generation capacity of the double-sided module can be improved.
The automobile industry has used a reflective one-way transmission film for a long time, but the film used in the automobile industry only has a reflective effect, and only by punching a plurality of small holes on the film, drivers and passengers in the automobile can observe the external situation through the small holes. This kind of technology of punching on membrane can't be applied to the photovoltaic trade. The present invention mainly utilizes prisms that form a specific angle on one surface of a transparent substrate, the angle being related to the refractive indices of the prism and the material used for the substrate. In the photovoltaic module, the surface containing the prism is used as a non-sunny surface of the film layer, and the light rays incident from the non-sunny surface can directly pass through the prism and the film layer or form multiple reflections on the surface of the prism of the film layer and finally enter the inside of the film layer; meanwhile, the light rays facing the sun can be reflected on the film layer and emitted back to the inside of the photovoltaic module.
Disclosure of Invention
The purpose of the invention is: aiming at the defects of the existing double-sided photovoltaic module, a novel photovoltaic module and a preparation method thereof are provided.
The technical scheme of the invention is as follows: the upper surface of the reflective unidirectional transmission film layer is a transmission surface, and the lower surface of the reflective unidirectional transmission film layer is a reflective surface; the transmission surface is a micro prism surface, the micro prism surface can partially or completely reflect light incident from the reflection surface, and the light incident from the micro prism surface can partially or completely penetrate through the reflection unidirectional projection film layer and is emitted from the reflection surface.
The reflective unidirectional transmission film is made of a transparent material, and can be any one of glass, PET, UV curing adhesive and acrylic, but is not limited to the above materials, and can also be made of other transparent materials commonly used in the field.
Furthermore, the light-reflecting one-way transmission film layer comprises a transparent cover plate and a light-reflecting one-way transmission film, and the light-reflecting one-way transmission film is formed by solidifying fluid acrylic on the transparent cover plate by using a mold and ultraviolet curing glue.
Furthermore, the one-way transmission rete of reflection of light includes transparent cover plate and the one-way transmission membrane of reflection of light, the one-way transmission membrane of reflection of light passes through the third tie coat and bonds on the bottom surface of transparent cover plate, the one-way transmission membrane of reflection of light is microprism structure. Furthermore, the transparent cover plate is made of a transparent material, and the material is any one of glass, PET (polyethylene terephthalate), UV (ultraviolet) curing adhesive and acrylic;
and/or, the one-way transmission membrane of reflection of light is transparent material, the material is any one of glass, PET, UV curing glue, ya keli.
Furthermore, the light-reflecting unidirectional transmission film layer comprises a transparent cover plate and a light-reflecting unidirectional transmission film which is integrally formed on the bottom surface of the transparent cover plate.
The utility model provides a photovoltaic module, includes upper cover plate, first tie coat, two-sided solar array, second tie coat that top-down laid in proper order and as above reflection of light unidirectional transmission rete, two-sided solar array sunny side is towards the upper cover plate, non-sunny side is towards reflection of light unidirectional transmission rete, the transmission face orientation of reflection of light unidirectional transmission rete keeps away from one side of solar array.
Furthermore, the double-sided solar battery pack is formed by connecting a plurality of double-sided solar sheets in series.
The preparation method of the photovoltaic module comprises the following steps:
and 3, applying pressure not exceeding two atmospheric pressures to the laminated layer in the step 2, and laminating at the temperature not exceeding 200 ℃ so as to connect and fix the upper cover plate, the double-sided solar battery pack and the reflective unidirectional transmission film layer to obtain the photovoltaic module.
The prepared photovoltaic module is subjected to the procedures of subsequent installation of aluminum profile frames, installation of junction boxes, pouring of sealant and the like by a conventional method in the field to obtain a photovoltaic module product
The invention has the beneficial effects that: when the photovoltaic module is used, one side of the upper cover plate (namely the sunny side of the photovoltaic module) faces to solar incident light, and one side of the reflective unidirectional transmission film layer (namely the back side of the photovoltaic module) not only utilizes reflected light and scattered light on the back side of the photovoltaic module, but also utilizes direct light at the gap position of the double-sided solar cell pieces and light rays penetrating through the double-sided solar cell pieces, so that the power generation capacity of the photovoltaic module product can be improved.
Drawings
FIG. 1 is a schematic view of the photovoltaic module of the present invention illustrating light utilization;
FIG. 2 is a schematic front view of a reflective unidirectional transmission film in a photovoltaic module according to the present invention;
fig. 3 is a schematic bottom view of the reflective unidirectional transmission film in the photovoltaic module of the present invention.
In the figure: 1. an upper cover plate; 2. double-sided solar cells; 3. 3-1 parts of a light-reflecting one-way transmission layer, 3-2 parts of a transparent cover plate, 4 parts of a light-reflecting one-way transmission film, 5 parts of sunward side incident light, 6 parts of non-sunward side incident light, and 7 parts of light passing through the gap in the assembly.
Detailed Description
The invention is described in more detail below with reference to the examples and figures 1 to 3:
the following examples are carried out on the premise of the technical scheme of the invention, and detailed embodiments and processes are given, but the scope of the invention is not limited to the following examples.
Example 1
A preparation method of a photovoltaic module comprises the following operation steps:
1. after the electrical property test, the double-sided solar cell 2 is subjected to single-sheet manual welding, and a solar cell string is obtained after series welding.
2. Preparing front cover glass (namely an upper cover plate) 1, EVA, a double-sided solar battery pack formed after further series welding of a solar battery string, EVA and a light-reflecting unidirectional transmission layer 3, wherein the light-reflecting unidirectional transmission layer 3 of the embodiment comprises a transparent cover plate 3-1 and a light-reflecting unidirectional transmission film 3-2 paved on the bottom surface of the transparent cover plate through EVA glue, and the light-reflecting unidirectional transmission film 3-2 is of a micro-prism structure.
A layer of transparent EVA is laid on the front cover glass 1, then the solar cell strings which are welded in series are laid, and then the solar cell strings are welded and connected. Then, EVA, a reflective unidirectional transmission film and EVA are sequentially paved on the back surface of the solar cell string 2, and finally, a transparent cover plate is paved. And (3) placing the laid laminated material into a laminating machine for laminating, and finishing the subsequent process steps according to the conventional photovoltaic assembly flow after the laminating is finished, thereby finally preparing the photovoltaic assembly.
The photovoltaic module prepared by the method utilizes the unidirectional reflection and transmission film layer laminated on the back of the double-sided solar battery pack in the module, so that incident light (namely incident light 5 on the non-sunny side and light 7 penetrating through the gap in the module) on the back of the photovoltaic module can be fully utilized, and simultaneously, incident light 6 in the non-battery area in the module is reflected to the surface of a solar battery piece to be utilized. The power gain of the sunny side of the double-sided photovoltaic module prepared by the method is larger than 10W, and the power gain of the back side is about 2-3W.
Example 2
A preparation method of a photovoltaic module comprises the following operation steps:
1. after the electrical property test, the double-sided solar cell 2 is subjected to single-sheet manual welding, and a solar cell string is obtained after series welding.
2. Preparing a front cover glass (namely an upper cover plate) 1, EVA, a double-sided solar battery pack formed after the solar battery string is further subjected to series welding, EVA and a reflective unidirectional transmission layer 3, and simultaneously having the effects of protecting and increasing the power of the assembly. A layer of transparent EVA is laid on the front cover glass 1, then the solar cell strings 2 which are welded in series are laid, and then the solar cell strings are connected in series through welding to form the double-sided solar cell group. Then, the EVA and the reflective unidirectional transmission layer 3 are sequentially laid on the back of the double-sided solar battery pack. And (3) placing the laid laminated material into a laminating machine for laminating to obtain a photovoltaic module, and then finishing the subsequent process steps according to the manufacturing flow of the conventional photovoltaic module product to finally prepare the photovoltaic module product.
According to the photovoltaic module, the light-reflecting unidirectional transmission layer 3 is integrally formed, and the microprism surface is arranged on one side of the light-reflecting unidirectional transmission film layer, so that incident light (namely incident light 5 on a non-sunny side and light 7 penetrating through a gap inside the module) on the upper back surface of the photovoltaic module can be fully utilized, and meanwhile, incident light 6 in a non-battery area inside the module is reflected to the surface of a double-sided solar battery to be utilized.
Example 3
The embodiment provides a preparation of a reflective unidirectional transmission film layer 3, which uses a polypropylene material as a transparent cover plate 3-1, and cures fluid acrylic on the front surface of the transparent cover plate 3-1 by using a mold with a microprism structure and acrylic ultraviolet curing glue by using an ultraviolet curing process on the surface of the transparent cover plate 3-1, and forms a reflective unidirectional transmission film 3-2 with a microprism structure. The ratio of the side length to the height of the micro-prism structure of the reflective one-way transmission film 3-2 is matched with the refractive index of the acrylic material, and the ratio of the side length to the height of the micro-prism structure of the reflective one-way transmission film 3-2 is about 2.5 in the embodiment.
In the reflective unidirectional transmission film layer prepared in the embodiment, 61.5% of light rays incident from the side of the transparent cover plate 3-1 are reflected; the light incident from the microprism structure side has a transmittance of more than 91%.
Claims (9)
1. A reflective unidirectional transmission film, comprising: the upper surface of the reflective unidirectional transmission film layer is a transmission surface, and the lower surface of the reflective unidirectional transmission film layer is a reflective surface; the transmission surface is a micro prism surface, the micro prism surface can partially or completely reflect light incident from the reflection surface, and the light incident from the micro prism surface can partially or completely penetrate through the reflection unidirectional projection film layer and is emitted from the reflection surface.
2. The light reflecting one way transmissive film layer of claim 1, wherein: the material is transparent, and the material is any one of glass, PET, UV curing glue and acrylic.
3. The light reflecting one way transmissive film layer of claim 1, wherein: the light-reflecting one-way transmission film layer comprises a transparent cover plate (3-1) and a light-reflecting one-way transmission film (3-2), and the light-reflecting one-way transmission film (3-2) is formed by solidifying fluid acrylic on the transparent cover plate (3-1) by using a mold and ultraviolet curing glue.
4. The light reflecting one way transmissive film layer of claim 1, wherein: the light-reflecting unidirectional transmission film layer (3) comprises a transparent cover plate (3-1) and a light-reflecting unidirectional transmission film (3-2), the light-reflecting unidirectional transmission film (3-2) is bonded on the bottom surface of the transparent cover plate (3-1) through a third bonding layer, and the light-reflecting unidirectional transmission film (3-2) is of a microprism structure.
5. The light reflecting one way transmissive film layer of claim 4, wherein: the transparent cover plate (3-1) is made of a transparent material, and the material is any one of glass, PET (polyethylene terephthalate), UV (ultraviolet) curing adhesive and acrylic;
and/or the reflective one-way transmission film (3-2) is made of a transparent material, and the material is any one of glass, PET, UV curing adhesive and acrylic.
6. The light reflecting one way transmissive film layer of claim 1, wherein: the light-reflecting one-way transmission film layer (3) comprises a transparent cover plate (3-1) and a light-reflecting one-way transmission film (3-2) which is integrally formed on the bottom surface of the transparent cover plate (3-1).
7. A photovoltaic module, characterized by: the reflective unidirectional transmission film comprises an upper cover plate (1), a first bonding layer, a double-sided solar battery pack, a second bonding layer and the reflective unidirectional transmission film (3) as claimed in claim 1 or 2, wherein the upper cover plate (1) is sequentially paved from top to bottom, the first bonding layer, the double-sided solar battery pack faces the sunny side, the non-sunny side faces the reflective unidirectional transmission film (3), and the transmission surface of the reflective unidirectional transmission film (3) faces the side far away from the solar battery pack.
8. The photovoltaic module of claim 6, wherein: the double-sided solar battery pack (3) is formed by connecting a plurality of double-sided solar sheets in series.
9. A method for the production of a photovoltaic module according to any of claims 6 to 8, characterized in that: the method comprises the following steps:
step 1, a plurality of double-sided solar cells (2) are connected in series to form a solar cell string, and then a plurality of solar cell strings are connected in series to form a double-sided solar cell pack;
step 2, an upper cover plate (1), a first bonding layer, the double-sided solar battery pack in the step 1, a second bonding layer and a light-reflecting unidirectional transmission film layer are sequentially paved from bottom to top, so that a laminated layer is formed, wherein the sunny side of the double-sided solar battery pack and the light-reflecting side of the light-reflecting unidirectional transmission film layer face in the same direction;
and 3, applying pressure not exceeding two atmospheres to the laminated layer in the step 2, and laminating at the temperature not exceeding 200 ℃ so as to connect and fix the upper cover plate (1), the double-sided solar battery pack and the reflective unidirectional transmission film layer to obtain the photovoltaic module.
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| CN201910850446.6A CN110634982A (en) | 2019-09-10 | 2019-09-10 | Light-reflecting unidirectional transmission film layer, photovoltaic module and preparation method of photovoltaic module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114709287A (en) * | 2022-02-25 | 2022-07-05 | 中能创光电科技(常州)有限公司 | Photovoltaic module with pattern and preparation method thereof |
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| US20100252107A1 (en) * | 2009-04-02 | 2010-10-07 | Toyota Jidosha Kabushiki Kaisha | Solar cell module |
| CN205159340U (en) * | 2015-06-09 | 2016-04-13 | 任丕清 | High -efficient electricity generation subassembly of two glasss |
| CN108258075A (en) * | 2017-12-29 | 2018-07-06 | 晶澳（扬州）太阳能科技有限公司 | A kind of solar cell module and preparation method thereof |
| CN208674146U (en) * | 2018-09-21 | 2019-03-29 | 苏州腾晖光伏技术有限公司 | A kind of two-sided double glass photovoltaic modulies |
-
2019
- 2019-09-10 CN CN201910850446.6A patent/CN110634982A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100252107A1 (en) * | 2009-04-02 | 2010-10-07 | Toyota Jidosha Kabushiki Kaisha | Solar cell module |
| CN205159340U (en) * | 2015-06-09 | 2016-04-13 | 任丕清 | High -efficient electricity generation subassembly of two glasss |
| CN108258075A (en) * | 2017-12-29 | 2018-07-06 | 晶澳（扬州）太阳能科技有限公司 | A kind of solar cell module and preparation method thereof |
| CN208674146U (en) * | 2018-09-21 | 2019-03-29 | 苏州腾晖光伏技术有限公司 | A kind of two-sided double glass photovoltaic modulies |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114709287A (en) * | 2022-02-25 | 2022-07-05 | 中能创光电科技(常州)有限公司 | Photovoltaic module with pattern and preparation method thereof |
| CN114709287B (en) * | 2022-02-25 | 2022-10-18 | 中能创光电科技(常州)有限公司 | Photovoltaic module with pattern and preparation method thereof |
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Application publication date: 20191231 |
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