CN220821589U - Ultra-thin reflection unit for photovoltaic cell gap and photovoltaic module - Google Patents
Ultra-thin reflection unit for photovoltaic cell gap and photovoltaic module Download PDFInfo
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- CN220821589U CN220821589U CN202322648252.2U CN202322648252U CN220821589U CN 220821589 U CN220821589 U CN 220821589U CN 202322648252 U CN202322648252 U CN 202322648252U CN 220821589 U CN220821589 U CN 220821589U
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- 239000010410 layer Substances 0.000 claims description 63
- 239000012790 adhesive layer Substances 0.000 claims description 10
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- 238000000576 coating method Methods 0.000 claims description 5
- 238000005187 foaming Methods 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000004806 packaging method and process Methods 0.000 description 4
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- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 2
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- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000004695 Polyether sulfone Substances 0.000 description 1
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- 125000005396 acrylic acid ester group Chemical group 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
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- Photovoltaic Devices (AREA)
Abstract
The utility model relates to an ultrathin reflecting unit for a photovoltaic cell gap and a photovoltaic module, which comprise 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, a reflecting layer formed on the outer surface of the microstructure layer and an insulating layer formed on the outer surface of the reflecting layer, wherein the microstructure layer consists of a plurality of microstructure units which are mutually parallel and sequentially connected, each microstructure unit comprises a trapezoid prism and an arc column formed on the top surface of the trapezoid prism, and the arc column is provided with a convex arc surface which is in smooth transitional connection with two side surfaces of the trapezoid prism. Therefore, the stability of the microstructure unit structure can be effectively ensured, and the defect that the microstructure unit structure is damaged is not easy to occur during manufacturing; and the height of the microstructure unit can be effectively reduced on the basis of ensuring the reflection efficiency.
Description
Technical Field
The utility model belongs to the technical field of photovoltaic component parts, and relates to a light reflecting unit, in particular to an ultrathin light reflecting unit for a photovoltaic cell gap and a photovoltaic component.
Background
The chinese invention of application number 201810089522.1 provides a back sheet for a photovoltaic module comprising: a transparent body; and a light reflecting film disposed on a surface of the transparent body. The reflective film comprises a concave-convex reflective structure and can further comprise a substrate and a glue layer, wherein the glue layer is arranged between the substrate and the transparent body, the concave-convex reflective structure is arranged on one side of the substrate opposite to the glue layer, and the concave-convex reflective structure comprises a microstructure arranged on the substrate and a reflective layer arranged on the microstructure. The thickness of the microstructures 112 in the reflective film structure may be 1-100 microns, preferably 3-30 microns; the thickness of the substrate 111 may be 30-150 microns, preferably between 40-100 microns; the thickness of the glue layer 115 may be 10-75 microns, preferably 20-50 microns. However, the reflective film is encapsulated between the back sheet and the back encapsulant of the photovoltaic module, so that the thickness of the reflective film needs to be reduced as much as possible to ensure the packaging quality of the photovoltaic module.
Disclosure of Invention
The utility model aims to solve the defects in the prior art, and provides an ultrathin reflecting unit for a photovoltaic cell gap.
In order to achieve the above purpose, the present utility model adopts the following technical scheme: an ultrathin reflecting unit for a photovoltaic cell gap 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, a reflecting layer formed on the outer surface of the microstructure layer and an insulating layer formed on the outer surface of the reflecting layer,
The microstructure layer consists of a plurality of microstructure units which are parallel to each other and are sequentially connected, each microstructure unit comprises a trapezoid prism and an arc-shaped column formed on the top surface of the trapezoid prism, and the arc-shaped column is provided with a convex arc surface which is in smooth transitional connection with two side surfaces of the trapezoid prism;
The cross section of the trapezoid prism is an isosceles trapezoid, and the height of the trapezoid prism is defined as h 1; the convex cambered surface is provided with a tangent plane parallel to the top surface of the trapezoid prism, and the distance between the tangent plane and the top surface of the trapezoid prism is defined as d 1; h 1≥d1.
Optimally, the arc-shaped column and the trapezoid prism are integrally formed.
Optimally, h 1≥2d1.
Optimally, the included angle beta formed by extending the two side surfaces of the trapezoid prism is 105-135 ℃.
Further, the height of the included angle beta is defined as h 2, and h 1＜h2≤2h1.
Preferably, an inward concave arc-shaped groove is formed in the surface of the substrate layer, which faces away from the microstructure layer.
Further, the bonding layer also extends into the arc-shaped groove, and the bonding layer is formed by curing after coating foaming glue.
Optimally, the thickness of the microstructure layer is 0.5-10 mu m, and the thickness of the basal layer is 15-100 mu m.
Further, the thickness of the reflecting layer is 300-800 angstroms, and the thickness of the bonding layer is 1-50 microns.
It is still another object of the present utility model to provide a photovoltaic module having the above ultra-thin light reflecting unit for photovoltaic cell gap.
Compared with the prior art, the utility model has the advantages that: according to the ultrathin reflecting unit for the photovoltaic cell gap, the microstructure layer is arranged to be a plurality of microstructure units consisting of the trapezoid prisms and the arc columns, so that the stability of the microstructure unit structure can be effectively ensured, and the defect that the microstructure unit structure is damaged is not easy to occur during manufacturing; and the height of the microstructure unit can be effectively reduced on the basis of ensuring the reflection efficiency.
Drawings
FIG. 1 is a schematic view of a photovoltaic module according to the present utility model;
FIG. 2 is a schematic view of the structure of an ultra-thin reflector unit for photovoltaic cell gaps according to the present utility model;
FIG. 3 is an enlarged view of a portion of FIG. 2;
fig. 4 is a schematic structural view of another embodiment of the ultra-thin reflector unit for photovoltaic cell gap of the present utility model.
Detailed Description
The utility model will be further described with reference to examples of embodiments shown in the drawings.
Example 1
The present embodiment provides an ultrathin reflecting unit 1 for photovoltaic cell gap, which mainly comprises a structure of an adhesive layer 10, a base layer 20, a microstructure layer 30, a reflecting layer 40, an insulating layer 50 and the like, as shown in fig. 2 and 3.
Wherein the substrate layer 20 is made of poly (meth) acrylate, polyethylene terephthalate, polyethylene naphthalate, polyethersulfone, polyurethane, polycarbonate, polyvinyl chloride, syndiotactic polystyrene or cycloolefin copolymer, and has a thickness of 15 μm to 100 μm; particularly preferred are poly (meth) acrylates. The adhesive layer 10 is formed on any surface of the base layer 20 in a conventional manner, such as coating, printing, etc., and has a thickness of 1 to 50 μm, and the material thereof is conventional, such as ethylene-vinyl acetate polymer, acrylic acid or acrylic acid ester (preferably ethylene-vinyl acetate polymer), etc. The insulating layer 50 is formed on the outer surface of the reflective layer 40 in such a manner as to be coated, printed, etc. and to ensure flatness of the outer envelope.
The microstructure layer 30 is formed on the other surface of the base layer 20, so that the microstructure layer 30 and the adhesive layer 10 are respectively located at two sides of the base layer 20, and the thickness thereof is 0.5-10 μm. The microstructure layer 30 is composed of a plurality of microstructure units that are parallel to each other and are sequentially connected (the microstructure units are arranged on the other surface of the base layer 20 in parallel and are connected to each other in pairs), each microstructure unit includes a trapezoidal prism 301 and an arc-shaped post 302 formed on the top surface of the trapezoidal prism 301 (at this time, the cross section of the trapezoidal prism 301 is isosceles trapezoid, and the cross section of the arc-shaped post 302 is arc-shaped), and the arc-shaped post 302 has a convex arc surface that is in smooth transitional connection with both sides of the trapezoidal prism 301. Since the cross section of the trapezoidal prism 301 is an isosceles trapezoid, its height is defined as h 1; the convex cambered surface is provided with a tangent plane parallel to the top surface of the trapezoid prism 301, and the distance between the tangent plane and the top surface of the trapezoid prism 301 is defined as d 1; h 1≥d1. The reflective layer 40 is formed on the outer surface of the microstructure layer 30, and may be formed by plating, depositing, etc., typically a highly reflective metal (such as aluminum, etc.), and has a thickness of 300 to 800 angstroms. Thus, the stability of the microstructure unit structure can be effectively ensured, and the defect that the microstructure unit structure is damaged is not easy to occur during manufacturing (the microstructure unit structure is pressed and solidified by adopting a corresponding die); and the height of the microstructure unit can be effectively reduced on the basis of ensuring the reflection efficiency (the influence on the reflection efficiency of the microstructure unit is small at this time).
In this embodiment, arcuate posts 302 are integrally formed with trapezoidal prisms 301, which are generally the same material, such as poly (meth) acrylate. In addition, the height h 1 of the trapezoidal prism 301 is generally greater than or equal to 2 times the spacing d 1 between the aforementioned tangential plane and the top surface of the trapezoidal prism 301; similarly, the included angle beta formed by extending the two side surfaces of the trapezoid prism 301 is 105-135 ℃, and the height of the included angle beta can be defined as h 2, so that h 1＜h2≤2h1 is formed; such microstructure unit structures are flat, which is advantageous for structural stability and also can sufficiently ensure the reflective effect of the corresponding reflective layer 40. In addition, the minimum thickness of the ultrathin reflecting unit for the photovoltaic cell gap can be 10-30% lower than that of the conventional photovoltaic cell gap.
Example 2
The present embodiment provides an ultrathin reflecting unit 1 for photovoltaic cell gap, as shown in fig. 4, which has a structure substantially identical to that in embodiment 1, except that: the surface of the substrate layer 20 facing away from the microstructure layer 30 is formed with an inward concave arc-shaped groove 201, so that the arc-shaped groove 201 is further filled with glue to form the adhesive layer 10, i.e. the adhesive layer 10 extends into the arc-shaped groove 201 and has a flat outer surface, so that the thickness of the adhesive layer 10 can be further reduced without affecting the adhesive property thereof. In this embodiment, the adhesive layer 10 is preferably formed by coating and curing a commercially available foaming glue (such as an orc silicone pressure sensitive adhesive). In certain extreme conditions, the glue may also fill only the arcuate grooves 201 and not extend to other areas of the outer surface of the substrate layer 20, thus saving the thickness of the original adhesive layer and thus facilitating a further reduction in the thickness of the ultra-thin retroreflective elements for photovoltaic cell gaps.
Example 3
The present embodiment provides a photovoltaic module, as shown in fig. 1, which adopts the ultra-thin light reflecting unit 1 for photovoltaic cell gap in embodiment 1 or embodiment 2; the battery pack comprises a back plate 2, a cover plate 3 covered on the back plate 2, and 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 is formed (in a conventional manner such as coating, etc., hereinafter the same) between the back plate 2 and the plurality of battery pieces 4, and a second adhesive film layer 6 is formed between the cover plate 3 and the plurality of battery pieces 4, thereby realizing the packaging of the plurality of battery pieces 4. Due to the reduction of the thickness of the light reflecting unit 1, the packaging between the back plate 2 and the first adhesive film layer 5 is facilitated, so that the packaging quality of the photovoltaic module is ensured.
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 (10)
1. An ultrathin reflecting unit for a photovoltaic cell gap, which comprises a substrate layer (20), a bonding layer (10) formed on any surface of the substrate layer (20), a microstructure layer (30) formed on the other surface of the substrate layer (20), a reflecting layer (40) formed on the outer surface of the microstructure layer (30), and an insulating layer (50) formed on the outer surface of the reflecting layer (40), and is characterized in that:
The microstructure layer (30) is composed of a plurality of microstructure units which are parallel to each other and are sequentially connected, each microstructure unit comprises a trapezoid prism (301) and an arc-shaped column (302) formed on the top surface of the trapezoid prism (301), and the arc-shaped column (302) is provided with a convex arc surface which is in smooth transitional connection with two side surfaces of the trapezoid prism (301);
The cross section of the trapezoid prism (301) is an isosceles trapezoid, and the height of the trapezoid prism is defined as h 1; the convex cambered surface is provided with a tangent plane parallel to the top surface of the trapezoid prism (301), and the distance between the tangent plane and the top surface of the trapezoid prism (301) is defined as d 1; h 1≥d1.
2. The ultra-thin retroreflective unit for photovoltaic cell gap of claim 1, wherein: the arc-shaped columns (302) and the trapezoid prisms (301) are integrally formed.
3. The ultra-thin retroreflective unit for photovoltaic cell gap of claim 1, wherein: h 1≥2d1.
4. The ultra-thin retroreflective unit for photovoltaic cell gap of claim 1, wherein: the included angle beta formed by extending the two side surfaces of the trapezoid prism (301) is 105-135 ℃.
5. The ultra-thin retroreflective unit for photovoltaic cell gap of claim 4, wherein: the height of the included angle beta is defined as h 2, then h 1＜h2≤2h1.
6. The ultra-thin retroreflective unit for photovoltaic cell gap of claim 1, wherein: an inward concave arc-shaped groove (201) is formed in the surface of the substrate layer (20) facing away from the microstructure layer (30).
7. The ultra-thin retroreflective unit for photovoltaic cell gap of claim 6, wherein: the adhesive layer (10) also extends into the arc-shaped groove (201), and the adhesive layer (10) is formed by curing after foaming glue coating.
8. The ultra-thin retroreflective unit for photovoltaic cell gap of claim 1, wherein: the thickness of the microstructure layer (30) is 0.5-10 mu m, and the thickness of the substrate layer (20) is 15-100 mu m.
9. The ultra-thin retroreflective unit for photovoltaic cell gap of claim 8, wherein: the thickness of the reflecting layer (40) is 300-800 angstrom, and the thickness of the bonding layer (10) is 1-50 mu m.
10. A photovoltaic module characterized in that it has an ultrathin retroreflective unit for photovoltaic cell gap according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322648252.2U CN220821589U (en) | 2023-09-28 | 2023-09-28 | Ultra-thin reflection unit for photovoltaic cell gap and photovoltaic module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322648252.2U CN220821589U (en) | 2023-09-28 | 2023-09-28 | Ultra-thin reflection unit for photovoltaic cell gap and photovoltaic module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220821589U true CN220821589U (en) | 2024-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322648252.2U Active CN220821589U (en) | 2023-09-28 | 2023-09-28 | Ultra-thin reflection unit for photovoltaic cell gap and photovoltaic module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220821589U (en) |
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2023
- 2023-09-28 CN CN202322648252.2U patent/CN220821589U/en active Active
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