CN216450660U - Photovoltaic module - Google Patents
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- CN216450660U CN216450660U CN202122921185.8U CN202122921185U CN216450660U CN 216450660 U CN216450660 U CN 216450660U CN 202122921185 U CN202122921185 U CN 202122921185U CN 216450660 U CN216450660 U CN 216450660U
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Classifications
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- 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
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- Photovoltaic Devices (AREA)
Abstract
The utility model discloses a photovoltaic module, comprising: the battery layer comprises a plurality of battery strings, the battery strings are arranged along a string arrangement direction, each battery string comprises a plurality of battery sheets which are arranged along a battery string extension direction perpendicular to the string arrangement direction, and the battery sheets in each battery string are connected in series through an interconnection structural member; the front plate is arranged on the front surface of the cell layer and comprises a plurality of first structural layers which are arranged along the thickness direction of the cell layer; the back plate is arranged on the back face of the battery layer and comprises a plurality of second structural layers, and the second structural layers are arranged in the thickness direction of the battery layer. According to the photovoltaic module, the structural strength of the photovoltaic module is ensured, and meanwhile, the thicknesses of the front plate and the back plate can be reduced, so that the thickness of the photovoltaic module can be reduced, the weight of the photovoltaic module is further reduced, the photovoltaic module is convenient to install and transport, and meanwhile, the labor cost of the photovoltaic module during installation and transport can be reduced.
Description
Technical Field
The utility model relates to the technical field of photovoltaics, in particular to a photovoltaic module.
Background
In the related art, in order to fully utilize solar energy and reduce electricity costs of users, more and more manufacturers have started to introduce photovoltaic modules for residential buildings, i.e., to install the photovoltaic modules on roofs and exterior walls and to generate electricity using solar energy. However, the traditional photovoltaic module is heavy in weight, not easy to install and low in installation efficiency, so that the labor cost is high, and meanwhile, danger exists during installation.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving at least one of the problems of the prior art. To this end, it is an object of the present invention to provide a photovoltaic module, which can reduce the thickness of the front and back plates, thereby reducing the weight of the photovoltaic module and facilitating the installation and transportation of the photovoltaic module.
A photovoltaic module according to an embodiment of the present invention includes: the battery layer comprises a plurality of battery strings, the battery strings are arranged along a string arrangement direction, each battery string comprises a plurality of battery sheets which are arranged along a battery string extending direction perpendicular to the string arrangement direction, and the battery sheets in each battery string are connected in series through an interconnection structural member; the front plate is arranged on the front surface of the cell layer and comprises a plurality of first structural layers which are arranged along the thickness direction of the cell layer; the back plate is arranged on the back face of the battery layer and comprises a plurality of second structural layers, and the second structural layers are arranged along the thickness direction of the battery layer.
According to the photovoltaic module provided by the embodiment of the utility model, the front plate comprises a plurality of first structural layers, the plurality of first structural layers are arranged along the thickness direction of the cell layer, and the back plate comprises a plurality of second structural layers, and the plurality of second structural layers are arranged along the thickness direction of the cell layer. From this, compare with traditional photovoltaic module, when guaranteeing photovoltaic module's structural strength, can reduce the thickness of front bezel and backplate to can reduce photovoltaic module's thickness, and then alleviate photovoltaic module's weight, make things convenient for photovoltaic module's installation and transportation, cost of labor when can reducing photovoltaic module installation simultaneously and transporting.
According to some embodiments of the utility model, the plurality of first structural layers and the plurality of second structural layers each comprise one or more of a PET layer, a PC layer, a PVC layer, a PP layer, a PS layer, and a fiberglass sheet.
According to some embodiments of the utility model, the front plate has a thickness H1Wherein, the H1Satisfies the following conditions: h is not more than 0.3mm1≤4mm。
According to some embodiments of the utility model, the back plate has a thickness H2Wherein, the H2Satisfies the following conditions: h is not more than 0.3mm2≤4mm。
According to some embodiments of the utility model, the front plate has a thickness equal to a thickness of the back plate.
According to some embodiments of the utility model, a side of the front plate remote from the cell layer is provided with a weatherable layer.
According to some embodiments of the utility model, the weathering layer has a thickness H3Wherein, the H3Satisfies the following conditions: h is not more than 0.01mm3≤0.1mm。
According to some embodiments of the utility model, the weathering layer comprises at least one of PVDF and ETFE.
According to some embodiments of the utility model, a first adhesive layer is disposed between two adjacent first structural layers, and a second adhesive layer is disposed between two adjacent second structural layers.
According to some embodiments of the utility model, the photovoltaic module further comprises: the first packaging adhesive film layer is arranged between the front plate and the front surface of the battery layer; and the second packaging adhesive film layer is arranged between the back plate and the back surface of the battery layer.
According to some embodiments of the utility model, the first packaging adhesive film layer has a thickness H4Wherein, the H4Satisfies the following conditions: h is not more than 0.5mm4Less than or equal to 2.0 mm; the thickness of the second packaging adhesive film layer is H5Wherein, the H5Satisfies the following conditions: h is not more than 0.5mm4≤2.0mm。
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a cross-sectional view of a photovoltaic module according to an embodiment of the present invention.
Reference numerals:
100-a photovoltaic module; 1-a battery layer; 2-front panel; 21-a first structural layer; 22-a first adhesive layer; 3-a rear plate; 31-a second structural layer; 32-a second adhesive layer; 4-a first encapsulation adhesive film layer; 5-a weatherable layer; 6-second packaging adhesive film layer.
Detailed Description
A photovoltaic module according to an embodiment of the present invention is described below with reference to fig. 1. The embodiments of the utility model described with reference to the drawings are illustrative.
As shown in fig. 1, a photovoltaic module 100 according to an embodiment of the present invention includes a cell layer 1, a front sheet 2, and a back sheet 3.
Specifically, the battery layer 1 includes a plurality of battery strings arranged in a string arrangement direction, each battery string includes a plurality of battery cells arranged in a string extending direction perpendicular to the string arrangement direction, and the plurality of battery cells in each battery string are connected in series by an interconnection structure. The front plate 2 is provided on the front surface of the cell layer 1, and the front plate 2 includes a plurality of first structural layers 21, and the plurality of first structural layers 21 are arranged in the thickness direction (for example, the up-down direction in fig. 1) of the cell layer 1. The back plate 3 is arranged on the back surface of the cell layer 1, the back plate 3 comprises a plurality of second structural layers 31, and the plurality of second structural layers 31 are arranged along the thickness direction of the cell layer 1. In the description of the present invention, "a plurality" means two or more.
For example, in the example of fig. 1, the cell layer 1 is located between the front sheet 2 and the back sheet 3, and the front sheet 2 and the back sheet 3 can protect the cell layer 1 from being damaged during installation and transportation of the photovoltaic module 10. Wherein two adjacent battery pieces in the same battery string can be connected through a plurality of interconnection structural members such as solder strips, a part of the plurality of interconnection structural members is welded on the front surface of one of the two adjacent battery pieces, and another part of the plurality of interconnection structural members is welded on the back surface of the other one of the two adjacent battery pieces, so as to interconnect the plurality of battery pieces into a complete battery string.
Because, the thickness of each first structural layer 21 and each second structural layer 31 is thinner, the front panel 2 includes a plurality of first structural layers 21, and the back panel 3 includes a plurality of second structural layers 31, so that the structural strength of the photovoltaic module 100 can be ensured, and the thickness of the front panel 2 and the thickness of the back panel 3 can be reduced, thereby reducing the thickness of the photovoltaic module 100, further reducing the weight of the photovoltaic module 100, facilitating the installation and transportation of the photovoltaic module 100, and simultaneously reducing the labor cost of the photovoltaic module 100 during installation and transportation.
According to the photovoltaic module 100 of the embodiment of the utility model, the front plate 2 includes a plurality of first structural layers 21, and the plurality of first structural layers 21 are arranged in the thickness direction of the cell layer 1, and the back plate 3 includes a plurality of second structural layers 31, and the plurality of second structural layers 31 are arranged in the thickness direction of the cell layer 1. From this, compare with traditional photovoltaic module, when guaranteeing photovoltaic module 100's structural strength, can reduce the thickness of front bezel 2 and backplate 3 to can reduce photovoltaic module 100's thickness, and then alleviate photovoltaic module 100's weight, make things convenient for photovoltaic module 100's installation and transportation, the cost of labor when simultaneously can reducing photovoltaic module 100 installation and transportation.
According to some embodiments of the present invention, the plurality of first structural layers 21 and the plurality of second structural layers 31 respectively comprise one or more of a PET layer, a PC layer, a PVC layer, a PP layer, a PS layer, and a glass fiber board. First, the plurality of first structural layers 21 and the plurality of second structural layers 31 may be any one of a PET layer, a PC layer, a PVC layer, a PP layer, a PS layer, and a glass fiber board; secondly, the plurality of first structural layers 21 and the plurality of second structural layers 31 may be any two of a PET layer, a PC layer, a PVC layer, a PP layer, a PS layer, and a glass fiber board; thirdly, the plurality of first structural layers 21 and the plurality of second structural layers 31 may be any three of a PET layer, a PC layer, a PVC layer, a PP layer, a PS layer, and a glass fiber sheet; fourthly, the plurality of first structural layers 21 and the plurality of second structural layers 31 may be any four of a PET layer, a PC layer, a PVC layer, a PP layer, a PS layer, and a glass fiber sheet; fifth, the plurality of first structural layers 21 and the plurality of second structural layers 31 may be any five of a PET layer, a PC layer, a PVC layer, a PP layer, a PS layer, and a glass fiber sheet; sixthly, the plurality of first structural layers 21 and the plurality of second structural layers 31 may be a PET layer, a PC layer, a PVC layer, a PP layer, a PS layer, and a glass fiber sheet.
Among them, PET (Polyethylene terephthalate) is a polycondensate of terephthalic acid and ethylene glycol, and PET has good mechanical properties, high impact strength and good folding resistance, and is not flammable, and has low gas and water vapor permeability, so that PET has excellent gas, water, oil and odor barrier properties, and high transparency. PC (Polycarbonate) is a high molecular polymer containing carbonate groups in the molecular chain, and has high impact strength, good stability, and high transparency. PVC (Polyvinyl chloride) is a polymer obtained by polymerizing vinyl chloride monomer in the presence of an initiator such as a peroxide or an azo compound, or in the presence of light or heat according to a radical polymerization mechanism. PVC has good flame retardancy and low gas and water vapor permeability. PP (Polypropylene) is a polymer of propylene produced by addition polymerization. PP is transparent in appearance and light in weight. PS (General Purpose Polystyrene) refers to a class of plastics that include a styrene group in the macromolecular chain. PS has high transparency, light transmittance of over 90 percent, and good rigidity and chemical corrosion resistance. The glass fiber board is a glass fiber board and is synthesized by a glass fiber material and a composite material with high heat resistance. The glass fiber board has high mechanical performance, dielectric performance, heat resistance and moisture resistance. From this, through choosing for use above-mentioned material preparation front bezel 2 and backplate 3, when guaranteeing photovoltaic module 100's intensity and reliability, can guarantee that as much sunlight shines in battery layer 1 as possible, improve photovoltaic module 100's photoelectric conversion efficiency, and can alleviate photovoltaic module 100's weight.
In some alternative embodiments, the front plate 2 has a thickness H1Wherein H is1Satisfies the following conditions: h is not more than 0.3mm1Less than or equal to 4 mm. When H is present1When the thickness is less than 0.3mm, the thickness of the front plate 2 is thin, which may reduce the structural strength of the photovoltaic module 100; when H is present1When the thickness is larger than 4mm, the thickness of the front plate 2 is thick, and the light transmittance of the front plate 2 can be affected while the weight of the photovoltaic module 100 is increased, so that the photoelectric conversion efficiency of the photovoltaic module 100 can be reduced. Thereby, by making H1Satisfies the following conditions: h is not more than 0.3mm1Be less than or equal to 4mm, when guaranteeing photovoltaic module 100's structural strength, can alleviate photovoltaic module 100's weight, can guarantee photovoltaic module 100's photoelectric conversion efficiency simultaneously.
In some alternative embodiments, the thickness of the back plate 3 is H2Wherein H is2Satisfies the following conditions: h is not more than 0.3mm2Less than or equal to 4 mm. When H is present2When the thickness is less than 0.3mm, the thickness of the back plate 3 is thin, which may reduce the structural strength of the photovoltaic module 100; when H is present2When the thickness of the back plate 3 is thicker than 4mm, the weight of the photovoltaic module 100 can be increased, when the photovoltaic module 100 is a dual-glass module, the light transmittance of the back plate 3 can be influenced, so that the double-sided rate of the photovoltaic module 100 can be reduced, and the photoelectric conversion of the photovoltaic module 100 can be reducedAnd (4) changing efficiency. Thereby, by making H2Satisfies the following conditions: h is not more than 0.3mm2Be less than or equal to 4mm, when guaranteeing photovoltaic module 100's structural strength, can alleviate photovoltaic module 100's weight, can guarantee photovoltaic module 100's photoelectric conversion efficiency simultaneously. Alternatively, the thickness of the front plate 2 and the thickness of the back plate 3 may be equal. Because the crooked problem of photovoltaic module 100 appears in the performance of expend with heat and contract with cold not simultaneously easily in front bezel 2 and backplate 3, set the thickness through with front bezel 2 to equal with backplate 3's thickness to make the expend with heat and contract with cold performance of front bezel 2 and backplate 3 roughly the same, thereby can avoid photovoltaic module 100 crooked.
According to some embodiments of the utility model, the side of the front plate 2 facing away from the cell layer 1 is provided with a weathering layer 5. Referring to fig. 1, the weather-resistant layer 5 may be disposed on the front surface of the front panel 2, and since the front surface of the front panel 2 is a main light-receiving surface, the weather resistance of the front panel 2 may be further enhanced, and the service life of the photovoltaic module 100 may be extended.
In some alternative embodiments, the weathering layer 5 has a thickness H3Wherein H is3Satisfies the following conditions: h is not more than 0.01mm3Less than or equal to 0.1 mm. When H is present3When the thickness is less than 0.01mm, the weather-resistant layer 5 is thin, and the weather resistance of the front plate 2 cannot be effectively enhanced; when H is present3If the thickness of the weather-resistant layer 5 is larger than 0.1mm, the light transmittance of the front sheet 2 may be reduced, thereby reducing the output of the photovoltaic module 100. Thus, when H3H is more than or equal to 0.01mm3When being less than or equal to 0.1mm, the thickness of the weather-resistant layer 5 is reasonable, and the output power of the photovoltaic module 100 can be ensured while the weather resistance of the front plate 2 is enhanced.
According to some embodiments of the present invention, the weathering layer 5 includes at least one of PVDF and ETFE. Wherein the weathering layer 5 may comprise PVDF or ETFE only; alternatively, the weathering layer 5 may include both PVDF and ETFE. PVDF (polyvinylidene Fluoride) is a highly non-reactive thermoplastic fluoropolymer, which has good chemical resistance, high temperature resistance, oxidation resistance, weather resistance, and radiation resistance. ETFE (Ethylene Tetra Fluoro Ethylene, Ethylene-tetrafluoroethylene copolymer) has good heat resistance, chemical resistance and electrical insulation properties. Thereby, the weather resistance of the front panel 2 can be enhanced.
According to some embodiments of the present invention, as shown in fig. 1, a first adhesive layer 22 is disposed between two adjacent first structural layers 21, and a second adhesive layer 32 is disposed between two adjacent second structural layers 31. So set up, can bond a plurality of first structural layer 21 for front bezel 2, a plurality of second structural layer 31 bond for backplate 3, and the connected mode is simple, and convenient operation can improve photovoltaic module 100's assembly efficiency. Alternatively, the first adhesive layer 22 and the second adhesive layer 32 may both be a glue layer, but are not limited thereto.
According to some embodiments of the present invention, the photovoltaic module 100 further comprises a first encapsulant layer 4 and a second encapsulant layer 6, the first encapsulant layer 4 being disposed between the front sheet 2 and the front side of the cell layer 1, and the second encapsulant layer 6 being disposed between the back sheet 3 and the back side of the cell layer 1. Therefore, the front plate 2 and the back plate 3 can be firmly fixed on the front surface and the back surface of the battery layer 1 respectively, and meanwhile, the first packaging adhesive film layer 4 and the second packaging adhesive film layer 6 can separate the battery layer 1 from the outside, so that the output power of the photovoltaic module 10 can be prevented from being influenced by water vapor and the like entering the battery layer 1.
In some optional embodiments, the thickness of the first packaging adhesive film layer 4 is H4Wherein H is4Satisfies the following conditions: h is not more than 0.5mm4Less than or equal to 2.0 mm. The thickness of the second packaging adhesive film layer 6 is H5Wherein H is5Satisfies the following conditions: h is not more than 0.5mm4Less than or equal to 2.0 mm. When H is present4When the thickness is less than 0.5mm, the thickness of the first packaging adhesive film layer 4 is thinner, and the front plate 2 cannot be firmly adhered to the front surface of the battery layer 1; when H is present4When the thickness is larger than 2.0mm, the thickness of the first encapsulation adhesive film layer 4 is thicker, which increases the weight of the photovoltaic module 100. Similarly, when H5When the thickness is less than 0.5mm, the back plate 3 can not be firmly adhered to the back surface of the battery layer 1; when H is present5Above 2.0mm, the weight of the photovoltaic module 100 is also increased. Thereby, by making H4Satisfies the following conditions: h is not more than 0.5mm4≤2.0mm、H5Satisfies the following conditions: h is not less than 0.5mm4Less than or equal to 2.0mm, the front plate 2 and the back plate 3 can be firmly bonded on the cell layer 1, and the weight of the photovoltaic module 100 can be reduced. Optionally, the first packaging adhesive film layer 4 and the second packagingThe adhesive film layer 6 may be an EVA film layer. The EVA is a copolymer of ethylene and vinyl acetate, wherein the EVA is a thermosetting hot melt adhesive and has no viscosity at normal temperature so as to be convenient to operate, and the EVA is subjected to hot pressing under certain conditions to generate fusion bonding and crosslinking curing to become completely transparent. EVA has excellent flexibility, impact resistance, optical transparency, adhesion and environmental stress cracking resistance. Thereby, the front sheet 2 and the back sheet 3 can be reliably bonded to the battery layer 1.
Other constructions and operations of the photovoltaic module 100 according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein. In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (11)
1. A photovoltaic module, comprising:
the battery layer comprises a plurality of battery strings, the battery strings are arranged along a string arrangement direction, each battery string comprises a plurality of battery sheets which are arranged along a battery string extending direction perpendicular to the string arrangement direction, and the battery sheets in each battery string are connected in series through an interconnection structural member;
the front plate is arranged on the front surface of the cell layer and comprises a plurality of first structural layers which are arranged along the thickness direction of the cell layer;
the back plate is arranged on the back face of the battery layer and comprises a plurality of second structural layers, and the second structural layers are arranged in the thickness direction of the battery layer.
2. The photovoltaic module of claim 1 wherein the plurality of first structural layers and the plurality of second structural layers each comprise one or more of a PET layer, a PC layer, a PVC layer, a PP layer, a PS layer, and a fiberglass sheet.
3. The photovoltaic module of claim 1, wherein the front plate has a thickness H1Wherein, the H1Satisfies the following conditions: h is not more than 0.3mm1≤4mm。
4. The photovoltaic module of claim 1, wherein the back sheet has a thickness H2Wherein, the H2Satisfies the following conditions: h is not more than 0.3mm2≤4mm。
5. The photovoltaic module of claim 1, wherein the front panel has a thickness equal to a thickness of the back panel.
6. The photovoltaic module according to any one of claims 1 to 5, wherein the side of the front sheet facing away from the cell layer is provided with a weatherable layer.
7. The photovoltaic module of claim 6, wherein the weatherable layer has a thickness H3Wherein, the H3Satisfies the following conditions: h is not more than 0.01mm3≤0.1mm。
8. The photovoltaic module of claim 6, wherein the weatherable layer comprises at least one of PVDF and ETFE.
9. The photovoltaic module according to any one of claims 1 to 5, wherein a first adhesive layer is provided between two adjacent first structural layers;
and a second bonding layer is arranged between every two adjacent second structural layers.
10. The photovoltaic module of any of claims 1-5, further comprising:
the first packaging adhesive film layer is arranged between the front plate and the front side of the battery layer;
and the second packaging adhesive film layer is arranged between the back plate and the back surface of the battery layer.
11. The photovoltaic module of claim 10, wherein the first encapsulant layer has a thickness H4Wherein, the H4Satisfies the following conditions: h is not more than 0.5mm4≤2.0mm；
The thickness of the second packaging adhesive film layer is H5Wherein, the H5Satisfies the following conditions: h is not more than 0.5mm4≤2.0mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122921185.8U CN216450660U (en) | 2021-11-25 | 2021-11-25 | Photovoltaic module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122921185.8U CN216450660U (en) | 2021-11-25 | 2021-11-25 | Photovoltaic module |
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| CN216450660U true CN216450660U (en) | 2022-05-06 |
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| CN202122921185.8U Active CN216450660U (en) | 2021-11-25 | 2021-11-25 | Photovoltaic module |
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| CN (1) | CN216450660U (en) |
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2021
- 2021-11-25 CN CN202122921185.8U patent/CN216450660U/en active Active
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