CN220012519U - Gap reflective film and photovoltaic module - Google Patents
Gap reflective film and photovoltaic module Download PDFInfo
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- CN220012519U CN220012519U CN202320836458.5U CN202320836458U CN220012519U CN 220012519 U CN220012519 U CN 220012519U CN 202320836458 U CN202320836458 U CN 202320836458U CN 220012519 U CN220012519 U CN 220012519U
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- 238000000576 coating method Methods 0.000 claims abstract description 24
- 239000011248 coating agent Substances 0.000 claims abstract description 23
- 239000000758 substrate Substances 0.000 claims abstract description 19
- 239000012528 membrane Substances 0.000 claims abstract description 6
- 239000010410 layer Substances 0.000 claims description 90
- 239000002313 adhesive film Substances 0.000 claims description 15
- 239000012790 adhesive layer Substances 0.000 claims description 12
- 239000005357 flat glass Substances 0.000 claims description 11
- 239000005341 toughened glass Substances 0.000 claims description 8
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 229920002493 poly(chlorotrifluoroethylene) Polymers 0.000 claims description 3
- 239000005023 polychlorotrifluoroethylene (PCTFE) polymer Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims 6
- 239000011347 resin Substances 0.000 claims 6
- 125000001153 fluoro group Chemical group F* 0.000 claims 4
- 239000011152 fibreglass Substances 0.000 claims 1
- 230000006378 damage Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 239000011247 coating layer Substances 0.000 description 6
- 238000003475 lamination Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 229910000679 solder Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 208000010392 Bone Fractures Diseases 0.000 description 1
- 206010017076 Fracture Diseases 0.000 description 1
- 239000004831 Hot glue Substances 0.000 description 1
- 230000006750 UV protection Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229920006223 adhesive resin Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009432 framing Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Photovoltaic Devices (AREA)
Abstract
The utility model discloses a gap reflective film and a photovoltaic module, wherein the gap reflective film comprises a reflective layer, a substrate layer and a bonding layer which are sequentially arranged from top to bottom, and also comprises a fluororesin coating arranged between the substrate layer and the bonding layer. Through optimizing clearance reflective membrane structural design the substrate layer with fluororesin coating between the tie coat prevents effects such as short circuit, ultraviolet destruction to improve the yields of product.
Description
Technical Field
The utility model relates to the technical field of photovoltaic modules, in particular to a gap reflective film and a photovoltaic module.
Background
With the continuous development of the photovoltaic industry in recent years, the power of the photovoltaic module is continuously improved and broken through. In order to ensure that the photovoltaic module can fully utilize sunlight in the gaps of the battery pieces, a gap reflective film is generated. The gap reflective film has excellent reflective performance, and can reflect light to the cell in a directional manner, so that the power of the photovoltaic module is stably improved.
Currently, the industrial gap film is mainly divided into three layers, namely a reflecting layer, a substrate layer and a bonding layer. The reflecting layer is mainly an alloy coating and directionally reflects incident light to the cell; the substrate layer is made of low-shrinkage film PET, so that the supporting effect is achieved; the adhesive layer is mainly cross-linked hot melt adhesive resin, and the reflective film is adhered to glass or a transparent backboard by heating.
However, during lamination, bubbles are likely to occur, and the solder strip tin layer has a puncture adhesive film to contact the surface layer of the reflective film, forming a loop, and having a high risk of short circuit. In addition, PET itself is inferior in ultraviolet resistance, and in long-term outdoor power generation, the back surface is extremely easily damaged by ultraviolet, and thus, the appearance is poor, the reflectance is lowered, and other anomalies are caused.
Therefore, the risk points are required to be reduced, the gap reflective membrane assembly is ensured to stably and continuously generate electricity in the life cycle, the reliability is improved, and the cost is reduced.
Disclosure of Invention
The utility model aims to provide a gap reflective film and a photovoltaic module, which solve the problems of short circuit caused by tin tip penetration, structural damage of PET caused by long-term outdoor ultraviolet irradiation and the like, effectively improve the power of the module and ensure the stable operation of the module in a life cycle.
In order to achieve the above object, an embodiment of the present utility model provides a gap reflective film, including a reflective layer, a substrate layer, and an adhesive layer sequentially disposed from top to bottom, and further including a fluororesin coating layer disposed between the substrate layer and the adhesive layer, where the fluororesin coating layer is one or more of an ETF fluororesin coating layer, a PCTFE fluororesin coating layer, a PFA fluororesin coating layer, and a FEP fluororesin coating layer, and further including a transparent insulating layer disposed on an upper surface of the reflective layer.
The transparent insulating layer is a glass fiber layer transparent insulating layer, an epoxy resin transparent insulating layer or a polyethylene plastic transparent insulating layer.
Wherein the thickness of the transparent insulating layer is 8-12 mu m.
Wherein the thickness of the bonding layer is 80-90 mu m.
Wherein the thickness of the substrate layer is 40-50 mu m.
In addition, the embodiment of the utility model also provides a photovoltaic module, which comprises front plate glass, an upper layer adhesive film, battery pieces, a lower layer adhesive film and the gap reflective film, wherein the front plate glass, the upper layer adhesive film, the battery pieces, the lower layer adhesive film and the gap reflective film are sequentially arranged from top to bottom, and the gap reflective film is used for directionally reflecting gap light irradiated between the battery pieces to the battery pieces through the front plate glass.
The width of the gap reflecting film between adjacent battery pieces is 4-5 mm, and the width of the gap reflecting film between battery strings formed by the adjacent battery pieces is 5-6 mm.
The transparent back plate or the transparent semi-tempered glass is arranged on the back surface of the gap reflective film, and the gap reflective film is adhered to the surface of the transparent back plate or the transparent semi-tempered glass.
Compared with the prior art, the gap reflective film and the photovoltaic module provided by the utility model have the following advantages:
according to the gap reflective film and the photovoltaic module provided by the embodiment of the utility model, through optimizing the structural design of the gap reflective film, the fluororesin coating between the substrate layer and the bonding layer can prevent effects of short circuit, ultraviolet damage and the like, so that the yield of products is improved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a gap film of a photovoltaic module in the prior art;
FIG. 2 is a schematic diagram of an embodiment of a gap reflector according to the present utility model;
FIG. 3 is a schematic top view of an embodiment of a photovoltaic module according to the present utility model;
fig. 4 is a schematic front view of a photovoltaic module according to an embodiment of the present utility model;
wherein, the 11-reflecting layer, the 12-substrate layer; 13-bonding layer, 14-transparent insulating layer, 15-fluororesin coating, 20-battery piece, 31-battery piece inter-piece reflecting film, 32-battery string inter-string reflecting film, 60-front plate glass, 40-upper layer adhesive film, 50-lower layer adhesive film, 30-gap reflecting film, 70-transparent back plate or transparent semi-tempered glass.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1 to 4, fig. 1 is a schematic structural diagram of a gap film of a photovoltaic module in the prior art; FIG. 2 is a schematic diagram of an embodiment of a gap reflector according to the present utility model; FIG. 3 is a schematic top view of an embodiment of a photovoltaic module according to the present utility model; fig. 4 is a schematic front view structure of an embodiment of a photovoltaic module provided by the present utility model.
In one specific embodiment, the gap reflective film comprises a reflective layer 11, a substrate layer 12 and an adhesive layer 13 which are sequentially arranged from top to bottom, and further comprises a fluororesin coating 15 arranged between the substrate layer 12 and the adhesive layer 13.
By optimizing the structural design of the gap reflective film, the fluororesin coating 15 between the substrate layer 12 and the bonding layer 13 can prevent short circuit, ultraviolet damage and other effects, thereby improving the yield of products.
The type and size of the fluororesin coating 15 are not limited in the present utility model, and the fluororesin coating 15 is one or more of ETF fluororesin coating, PCTFE fluororesin coating, PFA fluororesin coating, FEP fluororesin coating, or other types of fluororesin coating 15.
To further improve the quality of the gap reflective film, the reflective layer 11 is protected from short circuit caused by the solder strip tin tip piercing the adhesive film to contact the alloy plating layer during lamination, and in one embodiment, the gap reflective film further comprises a transparent insulating layer 14 disposed on the upper surface of the reflective layer 11.
Through set up transparent insulating layer 14 in reflector layer 11 upper surface protects reflector layer 11 to avoid reflecting structure damage, and avoid welding the short circuit phenomenon that takes the tin point to impale glued membrane contact alloy coating and cause in the lamination in-process, can also guarantee that the surface is level and smooth, EVA flows more well, less bubble production, and transparent insulating layer 14 can prevent reflector layer 11 in the production process simultaneously, because external force causes the destruction to the prism structure, thereby improves the yields of product.
The structure, thickness and arrangement of the transparent insulating layer 14 are not limited in the present utility model. The transparent insulating layer 14 is a glass fiber layer transparent insulating layer, an epoxy resin transparent insulating layer or a polyethylene plastic transparent insulating layer, or a transparent insulating layer 14 made of other materials.
The transparent insulating layer 14 is typically 8-12 μm thick, and a worker can select a suitable thickness as desired.
The thickness and type of the remaining layers are not limited in the present utility model, and it is preferable that the thickness of the adhesive layer 13 is 80-90 μm and the thickness of the base material layer 12 is 40-50 μm.
In one embodiment, the substrate layer 12 is a PET substrate layer having a thickness of 50 μm, and the adhesive layer 13 is an EVA adhesive layer having a thickness of 90 μm.
In addition, the embodiment of the utility model provides a photovoltaic module, which comprises a front plate glass 60, an upper layer adhesive film 40, a cell sheet 20, a lower layer adhesive film 50 and the gap reflective film 30, wherein the gap reflective film 30 is used for directionally reflecting the gap light irradiated between the cell sheets 20 to the cell sheets 20 through the front plate glass 60.
The photovoltaic module provided by the utility model comprises the gap reflective film and has the same beneficial effects, and the utility model is not repeated.
The specific position and arrangement of the gap reflection film 30 are not limited, and in one embodiment, the width of the gap reflection film between adjacent battery pieces 20 is 4-5 mm, and the width of the gap reflection film between battery strings formed by adjacent battery pieces 20 is 5-6 mm.
In order to facilitate the arrangement of the components, in one embodiment, the photovoltaic component further comprises a transparent back plate or transparent semi-toughened glass 70 arranged on the back surface of the gap reflective film, and the gap reflective film is adhered on the surface of the transparent back plate or the transparent semi-toughened glass.
In one embodiment, the photovoltaic module is mainly divided into a front plate glass 60, an upper layer adhesive film 40, a battery piece 20, a lower layer adhesive film 50, a gap reflective film 30, a transparent back plate or transparent semi-toughened glass 70 from top to bottom. When light is incident into the gap of the battery piece 20, namely the surface layer of the gap reflective film, the light is reflected to the front plate glass due to the directional reflection of the alloy coating, and then reaches the surface of the battery piece 20 through the secondary reflection of the front plate glass, so that the light at the gap of the battery piece 20 is fully utilized, and the power of the assembly is greatly improved. On the basis of the original gap film structure, by adding the transparent adhesive insulating layer 14 and the high-insulation transparent material with the thickness of 10 mu m, the phenomenon of short circuit caused by the fact that a solder strip tin tip pierces a glue film to contact an alloy plating layer in the lamination process can be effectively avoided, the surface is smooth, EVA flows better, and bubbles are less generated. In addition, the transparent insulating layer 14 can prevent the reflective layer 1 from damaging the prism structure due to external force during the production process.
The fluororesin coating 15 is added on the back of the gap reflective film substrate layer 12, so that the back ultraviolet irradiation can be effectively stopped, and the risk of PET damage failure is reduced.
Specifically, the transparent insulating layer 14 is adhered to the light reflecting layer 1 by transparent glue, and is formed into a whole after being heated and cured. In addition, on the back side of the gap reflective film, the fluororesin is uniformly coated on the PET through a coating process, and after the fluororesin is completely cured, the adhesive layer 13EVA is further attached on the PET. Therefore, the gap reflection film after improvement and optimization can be cut into strips according to the required width, and the preparation is completed. Considering the thickness of the whole gap reflective film, the transparent insulating layer 14 has a certain tensile strength, so that the thickness of the whole PET layer is 40 mu m, the thickness of the EVA adhesive layer 13 is 80 mu m, and the thickness of the whole EVA adhesive layer is about 135 mu m, thereby not only ensuring that the whole gap reflective film has no fracture risk in the production process, but also preventing the occurrence of defects such as hidden cracks of the battery piece 20 in the lamination process due to the excessive thickness.
The prepared gap reflective film 30 is sequentially adhered to a transparent back plate or transparent glass by heating to form a grid shape. In the laying process, the battery pieces 20 are uniformly positioned between the gap reflective films, so that the gap reflective films are contained between the battery pieces 20 and between the strings. And the photovoltaic module can be manufactured by laying, laminating, framing and the like according to the conventional module preparation process. In order to prevent the defects such as subsequent light leakage and the like caused by offset in the film pasting process and ensure the double-sided rate of the component, a gap reflecting film with the width of 4-5 mm between 20 battery pieces and 5-6 mm between strings is adopted.
The type of the light reflecting film 30 in the present utility model is not limited, and it may be divided into the inter-cell light reflecting film 31 and the inter-cell string light reflecting film 32.
Because the gap reflective membrane component is relatively higher than the conventional component, the power is effectively improved, the problems in the production and operation processes can be effectively solved, and the gap reflective membrane component has extremely high reliability.
In summary, according to the gap reflective film and the photovoltaic module provided by the embodiments of the utility model, by optimizing the structural design of the gap reflective film, the transparent insulating layer is arranged on the front surface of the reflective layer of the reflective film main body, so as to protect the reflective layer, thereby avoiding the short circuit phenomenon caused by the fact that the solder strip tin tip pierces the adhesive film to contact with the alloy plating layer in the lamination process, being smooth in surface, better in EVA flowing, less in bubble generation, and capable of preventing the reflective layer from damaging the prism structure due to external force in the production process, and improving the yield of products.
The gap reflective film and the photovoltaic module provided by the utility model are described in detail above. The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present utility model and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.
Claims (8)
1. The utility model provides a clearance reflective membrane, includes reflector layer, substrate layer and the tie coat that from the top down set gradually, its characterized in that still includes the setting the substrate layer with the fluoro resin coating between the tie coat, the fluoro resin coating is one or more in ETF fluoro resin coating, PCTFE fluoro resin coating, PFA fluoro resin coating, FEP fluoro resin coating, still includes the transparent insulating layer that sets up the reflector layer upper surface.
2. The gap reflective film of claim 1, wherein said transparent insulating layer is a fiberglass layer transparent insulating layer, an epoxy resin transparent insulating layer, or a polyethylene plastic transparent insulating layer.
3. The gap reflective film according to claim 2, wherein the transparent insulating layer has a thickness of 8-12 μm.
4. A gap reflective film according to any one of claims 1 to 3, wherein the thickness of the adhesive layer is 80 to 90 μm.
5. The retroreflective sheeting of claim 4 wherein the substrate layer has a thickness of 40 to 50 μm.
6. A photovoltaic module, comprising a front plate glass, an upper layer adhesive film, a cell sheet, a lower layer adhesive film and the gap reflective film according to any one of claims 1-5, which are sequentially arranged from top to bottom, wherein the gap reflective film is used for directionally reflecting gap light irradiated between the cell sheets to the cell sheets through the front plate glass.
7. The photovoltaic module according to claim 6, wherein the width of the gap light reflecting film between adjacent cell sheets is 4 to 5mm, and the width of the gap light reflecting film between cell strings formed by adjacent cell sheets is 5 to 6mm.
8. The photovoltaic module of claim 7, further comprising a transparent backsheet or transparent semi-tempered glass disposed on a back side of the gap reflective film, wherein the gap reflective film is adhered to a surface of the transparent backsheet or transparent semi-tempered glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320836458.5U CN220012519U (en) | 2023-04-13 | 2023-04-13 | Gap reflective film and photovoltaic module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320836458.5U CN220012519U (en) | 2023-04-13 | 2023-04-13 | Gap reflective film and photovoltaic module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220012519U true CN220012519U (en) | 2023-11-14 |
Family
ID=88681614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320836458.5U Active CN220012519U (en) | 2023-04-13 | 2023-04-13 | Gap reflective film and photovoltaic module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220012519U (en) |
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2023
- 2023-04-13 CN CN202320836458.5U patent/CN220012519U/en active Active
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Address after: 314400 No. 1 Jisheng Road, Jiaxing City, Zhejiang Province, Jianshan New District, Haining City Patentee after: Zhengtai Xinneng Technology Co.,Ltd. Address before: 314400 No. 1 Jisheng Road, Jiaxing City, Zhejiang Province, Jianshan New District, Haining City Patentee before: Zhengtai Xinneng Technology Co.,Ltd. |