CN221296780U - Reflective film for photovoltaic cell gap - Google Patents
Reflective film for photovoltaic cell gap Download PDFInfo
- Publication number
- CN221296780U CN221296780U CN202323245693.4U CN202323245693U CN221296780U CN 221296780 U CN221296780 U CN 221296780U CN 202323245693 U CN202323245693 U CN 202323245693U CN 221296780 U CN221296780 U CN 221296780U
- Authority
- CN
- China
- Prior art keywords
- layer
- microstructure
- angle
- photovoltaic cell
- reflective film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000010410 layer Substances 0.000 claims abstract description 82
- 239000000758 substrate Substances 0.000 claims abstract description 34
- 239000012790 adhesive layer Substances 0.000 claims abstract description 14
- -1 acrylic ester Chemical class 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 4
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 4
- 229920010524 Syndiotactic polystyrene Polymers 0.000 claims description 3
- 238000003490 calendering Methods 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 229920000515 polycarbonate Polymers 0.000 claims description 3
- 239000004417 polycarbonate Substances 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 7
- 238000005286 illumination Methods 0.000 abstract description 4
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 5
- 239000005038 ethylene vinyl acetate Substances 0.000 description 5
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 5
- 239000002313 adhesive film Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 2
- 239000011112 polyethylene naphthalate Substances 0.000 description 2
- 229920000193 polymethacrylate Polymers 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 210000000438 stratum basale Anatomy 0.000 description 1
- 239000005341 toughened glass Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Photovoltaic Devices (AREA)
Abstract
The utility model relates to a reflective film for a photovoltaic cell gap, which comprises a substrate layer, an adhesive layer formed on any surface of the substrate layer, a microstructure layer formed on the other surface of the substrate layer and a reflective layer formed on the outer surface of the microstructure layer, wherein the microstructure layer comprises a first microstructure unit formed in the middle of the other surface of the substrate layer and second microstructure units formed on two sides of the first microstructure unit and symmetrically arranged, the first microstructure unit consists of a plurality of isosceles triangular prisms which are parallel to each other and are continuously arranged, and the second microstructure unit consists of a plurality of non-isosceles triangular prisms which are parallel to each other and are continuously arranged; and two included angles are formed between each non-isosceles triangular prism and the base material layer, and the angle of the first included angle is larger than that of the second included angle. Therefore, the reflective film can be better adapted to sunlight incidence angles in different time, and the illumination utilization rate is further improved.
Description
Technical Field
The utility model belongs to the technical field of photovoltaic module parts, and relates to a reflective film, in particular to a reflective film for a photovoltaic cell gap.
Background
The photovoltaic cell is a photoelectric semiconductor sheet which directly generates electricity by utilizing sunlight, and can output voltage and generate current under the condition of a loop by illumination with certain intensity. The photovoltaic cell is generally composed of a solar cell, high-permeability toughened glass, EVA (ethylene-vinyl acetate) adhesive, a back plate and a metal frame, and has the characteristics of long service life, strong mechanical compression resistance and external force and the like.
The Chinese patent application number 202321524023.3 discloses a reflecting unit for a photovoltaic cell gap and a photovoltaic module, which comprises a substrate layer, a bonding layer formed on any surface of the substrate layer, a microstructure layer formed on the other surface of the substrate layer and a reflecting layer formed on the surface of the microstructure layer, wherein a first microstructure is formed on the surface of the bonding layer, which is away from the substrate layer. Through set up first microstructure on the surface that deviates from the stratum basale in the tie coat, so both can increase the adhesive force of this reflection of light unit and backplate, can promote its row's bubble nature of bonding to the backplate again, avoid the residual of bubble. However, the microstructure of such photovoltaic cell gap light reflecting unit structures is uniform, and they are usually at an angle to the horizontal when installed, resulting in different angles to the light at different times, resulting in lower light utilization.
Disclosure of Invention
The utility model aims to solve the defects in the prior art, and provides a reflective film for a photovoltaic cell gap.
In order to achieve the above purpose, the present utility model adopts the following technical scheme: the reflective film for the photovoltaic cell gap comprises a substrate layer, an adhesive layer formed on any surface of the substrate layer, a microstructure layer formed on the other surface of the substrate layer and a reflective layer formed on the outer surface of the microstructure layer, wherein the microstructure layer comprises a first microstructure unit formed in the middle of the other surface of the substrate layer and second microstructure units formed on two sides of the first microstructure unit and symmetrically arranged, and the width of the first microstructure unit is larger than that of the second microstructure unit;
The first microstructure unit consists of a plurality of isosceles triangular prisms which are parallel to each other and are arranged continuously, and the second microstructure unit consists of a plurality of non-isosceles triangular prisms which are parallel to each other and are arranged continuously;
Every the non-isosceles triangular prism forms two contained angles with the substrate layer between, defines two among the contained angles be close to the contained angle of first microstructure unit is first contained angle, keep away from the contained angle of first microstructure unit is the second contained angle, the angle of first contained angle is greater than the angle of second contained angle.
Optimally, the width ratio of the two groups of second microstructure units to the width ratio of the two groups of first microstructure units is 1-3: 7-9.
Optimally, the angle of the first included angle is 30-70 degrees, the angle of the second included angle is 20-50 degrees, and the angle of the vertex angle of the isosceles triangular prism is 60-120 degrees.
Optimally, the microstructure layer and the substrate layer are manufactured by coextrusion casting or calendaring.
Preferably, the material of the substrate layer is polycarbonate, syndiotactic polystyrene, polyethylene naphthalate, poly (meth) acrylate or polyethylene terephthalate, and the thickness of the substrate layer is 50-200 μm.
Further, the reflecting layer is a deposited aluminum film layer or a sputtered aluminum film layer, and the thickness of the reflecting layer is 500-600 angstroms.
Further, the adhesive layer is an EVA layer of 80-150 μm.
Further, the thickness of the microstructure layer is 30-80 μm.
Preferably, the surface of the adhesive layer facing away from the substrate layer has parallel and continuous saw-tooth-like projections.
Compared with the prior art, the utility model has the advantages that: according to the reflective film for the photovoltaic cell gap, the microstructure layer is arranged to be a mixed structure formed by the first microstructure unit and the second microstructure unit, so that the width of the first microstructure unit is larger than that of the second microstructure unit, and the angle of the first included angle of the non-isosceles triangular prism of the second microstructure unit is larger than that of the second included angle, and therefore the reflective film can be better adapted to sunlight incidence angles in different times, and the illumination utilization rate is further improved.
Drawings
FIG. 1 is a schematic diagram of a prior art photovoltaic cell;
FIG. 2 is a schematic view of the structure of a reflective film for photovoltaic cell gaps according to the present utility model;
FIG. 3 is a schematic view of a portion of a reflective film for photovoltaic cell gaps according to the present utility model;
FIG. 4 is an enlarged view of a portion of FIG. 3 at A;
Fig. 5 is a partial enlarged view at B in fig. 3.
Detailed Description
The utility model will be further described with reference to examples of embodiments shown in the drawings.
The conventional photovoltaic module shown in fig. 1 comprises a back plate 2, a cover plate 3 covered on the back plate 2, a plurality of battery pieces 4 arranged between the back plate 2 and the cover plate 3 at intervals, a first adhesive film layer 5 formed between the back plate 2 and the plurality of battery pieces 4 (the forming mode is conventional coating, and the like, and the following is the same), and a second adhesive film layer 6 formed between the cover plate 3 and the plurality of battery pieces 4, so that the packaging of the plurality of battery pieces 4 is realized. Because gaps are formed among the plurality of battery pieces 4, part of light leaks from the gaps and is not utilized, the reflective film 1 for the photovoltaic cell gap is additionally arranged between the back plate 2 and the first adhesive film layer 5 or on the surface, away from the back plate 2, of the first adhesive film layer 5, so that the reflective film 1 for the photovoltaic cell gap corresponds to the gaps, the utilization rate of the light is improved, and the photoelectric conversion efficiency of the photovoltaic module is increased.
The photovoltaic cell gap light reflecting film 1 shown in fig. 2 and 3 mainly includes a base material layer 20, an adhesive layer 10, a microstructure layer 30, a reflecting layer 40, and the like.
Wherein the material of the substrate layer 20 is polycarbonate, syndiotactic polystyrene, polyethylene naphthalate, poly (meth) acrylate or polyethylene terephthalate, and the thickness thereof is 50-200 μm; in the present embodiment, the material of the base material layer 20 is preferably PET because of its price and excellent flexibility, tensile strength and weather resistance. The adhesive layer 10 is formed on any surface of the substrate layer 20, and is an EVA layer of 80-150 μm (i.e. a commercially available EVA adhesive layer), and the conventional manner of forming the adhesive layer is adopted (such as coating or screen printing); in this embodiment, the surface of the adhesive layer 10 facing away from the substrate layer 20 has parallel and continuous saw-tooth protrusions, so that air can be conveniently and timely removed without residual bubbles when the adhesive layer 10 is bonded with the back plate 2. The microstructure layer 30 is formed on the other surface of the substrate layer 20 such that the microstructure layer 30 and the adhesive layer 10 are formed on both surfaces of the substrate layer 20 to be located on both sides of the substrate layer 20, respectively; in the present embodiment, the microstructure layer 30 and the base material layer 20 are preferably manufactured by coextrusion casting or calendaring, so that the manufacturing process of the reflective film 1 for photovoltaic cell gap can be simplified to improve the production efficiency; the thickness is usually 30 to 80 μm. The reflective layer 40 is formed on the outer surface of the microstructure layer 30, and is a deposited aluminum film or a sputtered aluminum film, and has a thickness of 500 to 600 angstroms.
In this embodiment, the microstructure layer 30 includes a first microstructure unit formed in the middle of the other surface of the substrate layer and second microstructure units formed on both sides of the first microstructure unit and symmetrically arranged; i.e. the second microstructure element has two groups, one on each side of the first microstructure element and connected thereto (in which case the first microstructure element and the second microstructure element are contiguous). It should be noted that: the width of the first microstructure unit is larger than that of the second microstructure unit, so that the first microstructure unit is in a main structure; in this embodiment, the width ratio of the two groups of second microstructure units to the width ratio of the first microstructure unit is 1 to 3: 7-9. The first microstructure unit consists of a plurality of isosceles triangular prisms which are parallel to each other and are arranged continuously, and the second microstructure unit consists of a plurality of non-isosceles triangular prisms which are parallel to each other and are arranged continuously (the heights of the isosceles triangular prisms are the same as those of the non-isosceles triangular prisms); at this time, two angles are formed between each non-isosceles triangular prism and the substrate layer, and an angle close to the first microstructure unit in the two angles is defined as a first angle (i.e., an angle β as shown in fig. 4), and an angle far away from the first microstructure unit is defined as a second angle (i.e., an angle α as shown in fig. 4), where an angle of the first angle (an angle β) is greater than an angle of the second angle (an angle α). In this embodiment, the angle of the first included angle is 30 to 70 °, and the angle of the second included angle is 20 to 50 °. As shown in FIG. 5, the angle of the isosceles triangular prism is preferably 60-120 degrees. Therefore, the reflective film can be better adapted to sunlight incidence angles in different time, and the illumination utilization rate is further improved.
The above embodiments are provided to illustrate the technical concept and features of the present utility model and are intended to enable those skilled in the art to understand the content of the present utility model and implement the same, and are not intended to limit the scope of the present utility model. All equivalent changes or modifications made in accordance with the spirit of the present utility model should be construed to be included in the scope of the present utility model.
Claims (9)
1. The utility model provides a photovoltaic cell is reflective membrane for clearance, it includes substrate layer, the adhesive layer that forms on arbitrary surface of substrate layer, the microstructure layer that forms on the other surface of substrate layer and the reflection coating that forms on the outer surface of microstructure layer, its characterized in that: the microstructure layer comprises a first microstructure unit formed in the middle of the other surface of the substrate layer and second microstructure units formed on two sides of the first microstructure unit and symmetrically arranged, and the width of the first microstructure unit is larger than that of the second microstructure unit;
The first microstructure unit consists of a plurality of isosceles triangular prisms which are parallel to each other and are arranged continuously, and the second microstructure unit consists of a plurality of non-isosceles triangular prisms which are parallel to each other and are arranged continuously;
Every the non-isosceles triangular prism forms two contained angles with the substrate layer between, defines two among the contained angles be close to the contained angle of first microstructure unit is first contained angle, keep away from the contained angle of first microstructure unit is the second contained angle, the angle of first contained angle is greater than the angle of second contained angle.
2. The reflective film for a photovoltaic cell gap according to claim 1, wherein: the width ratio of the two groups of second microstructure units to the width ratio of the two groups of first microstructure units is 1-3: 7-9.
3. The reflective film for a photovoltaic cell gap according to claim 1, wherein: the angle of the first included angle is 30-70 degrees, the angle of the second included angle is 20-50 degrees, and the angle of the vertex angle of the isosceles triangular prism is 60-120 degrees.
4. The reflective film for a photovoltaic cell gap according to claim 1, wherein: the microstructure layer and the substrate layer are manufactured through coextrusion casting or calendaring.
5. The reflective film for a photovoltaic cell gap according to claim 1, wherein: the substrate layer is made of polycarbonate, syndiotactic polystyrene, polynaphthalate, poly (methyl) acrylic ester or polyethylene terephthalate, and the thickness of the substrate layer is 50-200 mu m.
6. The reflective film for a photovoltaic cell gap according to claim 1 or 5, characterized in that: the reflecting layer is a deposited aluminum film layer or a sputtered aluminum film layer, and the thickness of the reflecting layer is 500-600 angstroms.
7. The reflective film for a photovoltaic cell gap according to claim 6, wherein: the adhesive layer is an EVA layer with the thickness of 80-150 mu m.
8. The reflective film for a photovoltaic cell gap according to claim 6, wherein: the thickness of the microstructure layer is 30-80 mu m.
9. The reflective film for a photovoltaic cell gap according to claim 1, wherein: the surface of the adhesive layer, which is away from the substrate layer, is provided with parallel and continuous saw-tooth-shaped protrusions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323245693.4U CN221296780U (en) | 2023-11-30 | 2023-11-30 | Reflective film for photovoltaic cell gap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323245693.4U CN221296780U (en) | 2023-11-30 | 2023-11-30 | Reflective film for photovoltaic cell gap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221296780U true CN221296780U (en) | 2024-07-09 |
Family
ID=91742459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323245693.4U Active CN221296780U (en) | 2023-11-30 | 2023-11-30 | Reflective film for photovoltaic cell gap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221296780U (en) |
-
2023
- 2023-11-30 CN CN202323245693.4U patent/CN221296780U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207183291U (en) | Two-side transparent photovoltaic module structure with reflection bar | |
| CN106449840B (en) | A kind of photovoltaic module reflectance coating and photovoltaic module | |
| CN106449830A (en) | Reflecting back plate for photovoltaic assembly | |
| CN220754778U (en) | High-reflectivity reflective film | |
| CN221296780U (en) | Reflective film for photovoltaic cell gap | |
| CN117038747A (en) | High-reflectivity photovoltaic reflective film and preparation method thereof | |
| CN208596683U (en) | A kind of tightly packed type reflective membrane of photovoltaic module plane | |
| CN217881539U (en) | Novel quantum dot photovoltaic backboard and double-sided photovoltaic assembly | |
| CN108022997A (en) | A kind of light total reflection film of photovoltaic module | |
| CN102681047A (en) | Composite-structure Fresnel lens | |
| CN207690814U (en) | A kind of light total reflection film of photovoltaic module | |
| CN220021146U (en) | Photovoltaic cell is reflection of light unit and photovoltaic module for clearance | |
| CN208315577U (en) | Multistage enhancing gain film for photovoltaic module string spacing, piece spacing and welding | |
| CN208000929U (en) | A kind of gain film in photovoltaic module string spacing and piece spacing | |
| CN211828790U (en) | Packaging adhesive film and photovoltaic module | |
| CN115911140A (en) | High-light-transmission and water vapor transmission-resistant photovoltaic module and preparation method and application thereof | |
| CN208315576U (en) | Multistage enhancing gain film for photovoltaic module string spacing, piece spacing and welding | |
| CN216864059U (en) | Positioning adhesive tape with light reflecting function | |
| CN209515687U (en) | Photovoltaic module | |
| CN208257760U (en) | A kind of photovoltaic module reflectance coating and photovoltaic module | |
| CN208028077U (en) | A kind of generating electricity on two sides solar double-glass assemblies back-panel glass having both antireflective and high reflection | |
| CN208315567U (en) | Reflectance coating, photovoltaic glass panel and photovoltaic module | |
| CN202067810U (en) | Light-transmitting double-surface solar battery component | |
| CN209822666U (en) | Photovoltaic module with reflective membrane | |
| CN219929956U (en) | Anti-oxidation photovoltaic reflective adhesive film |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |