CN219106170U - Full-black double-glass photovoltaic module - Google Patents
Full-black double-glass photovoltaic module Download PDFInfo
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- CN219106170U CN219106170U CN202223059006.5U CN202223059006U CN219106170U CN 219106170 U CN219106170 U CN 219106170U CN 202223059006 U CN202223059006 U CN 202223059006U CN 219106170 U CN219106170 U CN 219106170U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model relates to the technical field of photovoltaic modules, in particular to a full-black double-glass photovoltaic module, which comprises a battery piece layer, wherein the battery piece layer comprises at least two battery strings, and each battery string is formed by connecting at least two photovoltaic battery pieces in series; the front surface of the photovoltaic cell is free of grid lines; the two ends of the back of each photovoltaic cell are provided with non-welding areas, a sheet gap is arranged between two adjacent photovoltaic cells, a sheet gap film is arranged at the sheet gap, two sides of the sheet gap film are respectively connected with the two adjacent non-welding areas, and the sheet gap film is black. The photovoltaic cell pieces are bonded together through the sheet gap adhesive film, and the sheet gap adhesive film completely shields the welding strip parts among the photovoltaic cell pieces, so that the full black appearance of the front surface of the photovoltaic module is realized; the photovoltaic cell pieces are bonded and connected in series through the sheet gap adhesive film to form a cell string, and the cell string cannot deviate in position in the circulation process, so that the processing accuracy of each procedure is ensured; the photovoltaic cells do not need to be stacked, the front side is free from shading effect, and the photoelectric conversion efficiency is higher.
Description
Technical Field
The utility model relates to the technical field of photovoltaic modules, in particular to a full-black double-glass photovoltaic module.
Background
The solar photovoltaic module is a core part in a solar power generation system, and has the advantages of long service life, cleanliness and flexibility, and is used for converting solar energy into electric energy. In recent years, policies are continuously put out at home and abroad, enterprises and individuals are encouraged to adopt distributed photovoltaic power generation, and the development of the distributed photovoltaic is continuously jumping on new steps. In the actual market, the resident roof and landscape project often have requirements on the overall aesthetic degree, especially in overseas markets with developed economy such as europe, the color value of the photovoltaic module cannot be ignored, and the full-black photovoltaic module technology is receiving more and more attention. However, the existing full black photovoltaic module has the following technical problems: (1) the black film is directly stuck on the surfaces of the welding strip and the bus bar to realize full black appearance, but the surface of the battery is shaded in a large area, and the photoelectric conversion efficiency is low, as in patent CN208873734U, the full black film sticking photovoltaic module is disclosed, and comprises a photovoltaic cell, a serial connection strip, a bus bar, glass, a plate and a black film, wherein the black film is stuck on the surfaces of the serial connection strip and the bus bar; (2) the black photovoltaic module comprises a glass plate, wherein the glass plate is provided with a first shading piece, and the first shading piece and a welding strip are oppositely arranged to be used for shading the welding strip; (3) the black bus bar is often matched with the black bus bar, the surface of the black bus bar is provided with a black coating, the coating is non-conductive and is difficult to weld, the conventional pre-layer dotting test needs manual tooling or polishing, polishing or tin soldering is needed after lamination, and production automation and cost are affected.
Disclosure of Invention
In order to solve at least one problem in the background art, the utility model provides a full-black double-glass photovoltaic module, wherein the front surface of the photovoltaic module is full black, a large-area covering shading piece is not needed, the power loss is small, the photoelectric conversion efficiency is high, and the relative positions of photovoltaic cells cannot deviate in the processing process.
The utility model adopts the following technical scheme:
the full-black double-glass photovoltaic module comprises a battery piece layer, wherein the battery piece layer comprises at least two battery strings, and each battery string is formed by connecting at least two photovoltaic battery pieces in series; the front surface of the photovoltaic cell is free of grid lines; the two ends of the back of each photovoltaic cell are provided with non-welding areas, a sheet gap is arranged between two adjacent photovoltaic cells, a sheet gap film is arranged at the sheet gap, two sides of the sheet gap film are respectively connected with the two adjacent non-welding areas, and the sheet gap film is black.
Furthermore, the back of the photovoltaic cell is provided with a P area welding spot and an N area welding spot which are distributed in a whole row, the P area welding spot and the N area welding spot are alternately distributed in a whole row, and the distance between the welding spot closest to the edge of the photovoltaic cell and the edge of the photovoltaic cell is a, and a is more than or equal to 6mm and less than or equal to 15mm.
Further, the width of the non-welding area is b, and b is more than or equal to 4mm and less than or equal to 12mm.
Further, the sheet gap film comprises a substrate layer, an adhesive layer and a black functional coating layer arranged between the substrate layer and the adhesive layer, wherein the adhesive layer is adhered to the non-welding area.
Further, the substrate layer is a black PET layer, and the thickness of the substrate layer is 40-70 mu m.
Further, the adhesive layer is a transparent hot melt resin film, and the thickness of the adhesive layer is 30-60 mu m.
Further, two sides of the photovoltaic cell piece connecting piece gap pasting film are both first sides, two sides adjacent to the first sides are both second sides, and the vertical distance between two ends of the length direction of the piece gap pasting film and the nearest second side is d, and d is more than 0 and less than a.
Further, the back of the battery strings is provided with welding strips connected with each photovoltaic battery piece, bus bars are arranged on the front face of the welding strips between two adjacent battery strings and the front face of the welding strips on the outer sides of the head-to-tail battery strings, black adhesive film strips are arranged on the front faces of the bus bars, and the black adhesive film strips are lapped on the piece gap adhesive film and cover the bus bars.
Further, the length of the black glue film strip is greater than the length of the bus bar.
Further, front plate glass is arranged on the front face of the battery string, the front plate glass is bonded with the battery string through a front plate adhesive film, back plate glass is arranged on the back face of the battery string, and the back plate glass is bonded with the battery string through a back plate adhesive film; the back plate adhesive film is black adhesive film, and the back plate glass is common transparent glass; or the back plate adhesive film is transparent adhesive film, and the back plate glass is black glazed glass.
Compared with the prior art, the utility model has the beneficial effects that:
1) The photovoltaic module is provided with the sheet gap adhesive film, the photovoltaic cell pieces are adhered together through the sheet gap adhesive film, and the sheet gap adhesive film completely shields the silver color of the welding strip part between the photovoltaic cell pieces, so that the full black appearance of the front face of the photovoltaic module is realized; meanwhile, the photovoltaic cell pieces are bonded and connected in series through the sheet gap adhesive film to form a cell string, and the cell string cannot deviate in position in the circulation process, so that the processing accuracy of each process is ensured; in addition, the photovoltaic cell pieces do not need to be stacked, the front side is free from shading effect, and the photoelectric conversion efficiency is higher.
2) The front surface of the photovoltaic cell does not have grid lines, and the back surface welding is adopted completely, so that the influence of the silver appearance of the welding strip is avoided, and the appearance is ensured to be completely black.
3) The bus bar is made of conventional silver copper-tin alloy, a black bus bar is not required to be used, the front appearance of the photovoltaic module is not affected, the problems that the surface of the black bus bar is a black coating, the coating is not conductive and is difficult to weld are avoided, a conventional bus bar welding junction box does not need to polish the black coating or solder, the processing procedure is simplified, and the production cost is reduced.
Drawings
For a clearer description of embodiments of the utility model or of solutions in the prior art, the drawings which are used in the description of the embodiments or of the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from them without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of a full black dual-glass photovoltaic module of the present utility model;
FIG. 2 is a schematic view of the back side structure of a monolithic photovoltaic cell of this utility model;
FIG. 3 is a schematic view of the structure of a non-soldering region of a photovoltaic cell of the present utility model;
FIG. 4 is a schematic view of the structure of the back adhesive sheet gap film of the battery string of the present utility model;
FIG. 5 is a schematic view of the structure of the sheet gap film of the present utility model;
FIG. 6 is a schematic view showing the structure of the adhesive bus bar and the black adhesive film bar according to the present utility model;
FIG. 7 is an enlarged schematic view of the portion A of FIG. 1;
fig. 8 is an enlarged schematic view of the portion B in fig. 1.
In the figure: the photovoltaic cell comprises a 1-photovoltaic cell piece, a 2-piece gap film, a 3-welding strip, a 4-bus bar, a 5-black adhesive film strip, a 6-front plate adhesive film, 7-front plate glass, 11-first side edges, 12-second side edges, 13-welding spots, 14-non-welding areas, 15-P area welding spots, 16-N area welding spots, 21-substrate layers, 22-bonding layers and 23-black functional coating layers.
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 fall within the scope of the utility model.
The utility model is discussed in detail below in conjunction with fig. 1-8 and the specific embodiments:
the embodiment of the utility model provides a full black double-glass photovoltaic module, which is shown in figures 1-8, and comprises a battery piece layer, wherein the battery piece layer comprises at least two battery strings, and each battery string is formed by connecting at least two photovoltaic battery pieces 1 in series; the front surface of the photovoltaic cell 1 is free of grid lines; the two ends of the back of the photovoltaic cell pieces 1 are provided with non-welding areas 14, a piece gap is arranged between two adjacent photovoltaic cell pieces 1, a piece gap film 2 is arranged at the piece gap, two sides of the piece gap film 2 are respectively connected with the two adjacent non-welding areas 14, and the piece gap film 2 is black. The non-welding area 14 is internally provided with no welding spots 13, namely, the back surface is used for welding the battery pieces, the influence of the silver appearance of the welding strips 3 is avoided, the battery pieces 1 are adhered together through the sheet gap adhesive film 2, the silver of the welding strips 3 between the battery pieces 1 is completely shielded by the sheet gap adhesive film 2, and the full black appearance of the front surface of the photovoltaic module is realized; meanwhile, the photovoltaic cell pieces 1 are bonded and connected in series through the sheet gap adhesive film 2 to form a cell string, and the cell string cannot deviate in position in the circulation process, so that the processing accuracy of each process is ensured; in addition, the photovoltaic cell pieces 1 do not need to be stacked, the front side is free from shading effect, and the photoelectric conversion efficiency is higher. Preferably, the back side welded cell may be an IBC cell, an MWT cell, or the like, wherein the IBC cell employs a technique in which both positive and negative electrode metal contacts are moved to the back side of the cell.
As shown in fig. 2, the back of the photovoltaic cell is provided with a P area welding spot 15 and an N area welding spot 16 which are distributed in a whole row, the P area welding spot 15 and the N area welding spot 16 are alternately distributed in a whole row, and the distance between the welding spot 13 closest to the edge of the photovoltaic cell 1 and the edge of the photovoltaic cell 1 is a, and a is more than or equal to 6mm and less than or equal to 15mm.
As shown in FIG. 3, the width of the non-welded zone is b,4 mm.ltoreq.b.ltoreq.12 mm. Specifically, the width of the overlapping area of the sheet gap film 2 and the photovoltaic cell sheet 1 is c, and c is more than 0 and less than b, so that the sheet gap film 2 can not influence the welding of the welding strip 3 and the welding spot 13.
As shown in fig. 5, the sheet-gap film 2 includes a base material layer 21, an adhesive layer 22, and a black functional paint layer 23 provided between the base material layer 21 and the adhesive layer 22, and the adhesive layer 22 is adhered to the non-land 14.
The base material layer 21 is a black PET layer, the thickness of the base material layer 21 is 40-70 mu m, the thermal shrinkage rate is less than 1%, and the large deformation caused when the adhesive layer 22 is melted by heating is avoided.
The main components of the black functional coating layer 23 are functional resin, black functional pigment, curing agent and the like, the thickness is 10-30 mu m, the black functional coating layer 23 is coated on the substrate layer 21 to obtain a black PET matrix, the influence of the color of the welding strip 3 on the back of the sheet gap film 2 on the black appearance is avoided, and the other side of the black functional coating layer 23 is adhered with an adhesive layer 22.
The bonding layer 22 is a transparent hot-melt resin film, the thickness of the bonding layer 22 is 30-60 mu m, the melting temperature is 65-90 ℃, and when the battery strings are preheated by a heating plate at the bottom of the conveyor belt, the sheet gap film 2 is adhered to the back surface of the photovoltaic cell 1 after reaching the melting temperature of the bonding layer 22.
As shown in fig. 2-4, two sides of the adhesive sheet film 2 of the photovoltaic cell sheet 1 are first sides 11, two sides adjacent to the first sides 11 are second sides 12, and the vertical distance between two ends of the sheet film 2 in the length direction and the nearest second side 12 is d, wherein d is more than 0 and less than a; the limitation of the length of the sheet gap film 2 ensures that the sheet gap film 2 can shield all the welding strips 3 on the back surface and does not exceed the outer edge of the photovoltaic cell 1, and the overall appearance is not affected.
As shown in fig. 6-8, the back of each cell string is provided with a welding strip 3 connected with each photovoltaic cell chip 1, the front of the welding strip 3 between two adjacent cell strings and the front of the welding strip 3 at the outer side of the head-tail cell string are provided with bus bars 4, the front of each bus bar 4 is provided with a black adhesive film strip 5, and the black adhesive film strips 5 are lapped on the sheet gap adhesive film 2 and cover the bus bars 5. The black adhesive film strips 5 are arranged, and the front surfaces of the bus bars 4 are covered with black adhesive films, so that the front surfaces of the photovoltaic modules are kept completely black. And the bus bar 4 can be conventional silver copper-tin alloy, the front appearance of the photovoltaic module is not affected even if the black bus bar 4 is not used, the problems that the surface of the black bus bar 4 is a black coating, the coating is non-conductive and is difficult to weld are avoided, a conventional bus bar 4 welding junction box is not required to polish the black coating or to be welded with tin, the processing procedure is simplified, and the production cost is reduced.
The length of the black plastic film strip 5 is greater than that of the bus bar 4, so that the whole bus bar 4 can be covered, better fixation is achieved, and preferably, two ends of the black plastic film strip 5 in the length direction respectively exceed the bus bar by 2-5mm. The width of the black adhesive film strip 5 is smaller than the distance between two adjacent battery strings, and when the black adhesive film strip 5 melts, excessive overflow to the photovoltaic cell 1 is avoided, so that the product quality is not affected; preferably, the black plastic film strip 5 is arranged between the two photovoltaic cell pieces 1 in a middle, and the shortest distance between the black plastic film strip 5 and the photovoltaic cell pieces 1 is g, wherein g is more than or equal to 1mm and less than or equal to 2mm; the width of the black adhesive film strip 5 is larger than that of the bus bar 4, and the distance of the black adhesive film strip 5 exceeding the bus bar 4 in the width direction is f which is more than or equal to 2mm and less than or equal to 3mm; preferably, the width of the black glue film strip 5 is 8mm.
As shown in fig. 6, the front surface of the battery string is provided with a front plate adhesive film 6 and a front plate glass 7 bonded to the battery string by the front plate adhesive film 6, and the back surface of the battery string is provided with a back plate adhesive film and a back plate glass bonded to the battery string by the back plate adhesive film. Specifically, the front plate adhesive film 6 is made of high-permeability POE or EVA material, and the front plate glass 7 is made of common transparent glass, so that the photoelectric conversion efficiency of the photovoltaic cell 1 is not affected.
Specifically, the matching of the back plate adhesive film and the back plate glass can have two schemes, wherein the back plate adhesive film is a black adhesive film, and the back plate glass is common transparent glass; or the back plate adhesive film is a transparent adhesive film, and the back plate glass is black glazed glass; preferably, when the back plate adhesive film is a black adhesive film, black POE or EVA material is adopted; when the back plate adhesive film is a transparent adhesive film, POE or EVA materials are adopted. The black substrate of the whole battery string can be processed by the two schemes, and finally the photovoltaic module with the completely black appearance is obtained. In addition, the front of busbar is provided with two-layer glued membrane, fills fully, avoids appearing photovoltaic module lamination back lead-out wire area lack of glue, exposes the bad condition of white point outward appearance that the front knurled glass decorative pattern led to.
The utility model relates to a full-black double-glass photovoltaic module, which comprises the following specific production processes:
firstly, the photovoltaic cell pieces 1 are adsorbed onto a welding platform, the back faces upwards face a welding lamp tube, a piece of gap film 2 is placed between every two pieces of photovoltaic cell pieces 1 in the middle, the photovoltaic cell pieces 1 are preheated through a heating plate at the bottom of a conveyor belt, after reaching the melting temperature of an adhesive layer 22 of the piece of gap film 2, the piece of gap film 2 is adhered to a non-welding area 14 at the back of the photovoltaic cell pieces 1, and the photovoltaic cell pieces 1 are connected in series to form a cell string; then, the welding strip 3 is placed at the position of a welding spot 13 on the back of the whole battery string, the welding strip 3 is welded at the position of the welding spot 13 through heating of a welding lamp, and a light shielding plate is arranged in the area of the sheet gap film 2 when the welding lamp is heated, so that the substrate layer 21 is prevented from being melted by high temperature generated by direct irradiation of the lamp; the front plate glass 7 is fed, a front plate adhesive film 6 is laid on the front plate glass 7, the battery strings are moved to the upper side of the front plate adhesive film 6 through adsorption circulation, the battery strings are kept in a suspended state with the front plate glass 7, the bus bars 4 are cut and then adsorbed between two adjacent battery strings and the outer sides of the battery strings at the head and the tail are contacted with the welding strips 3 and welded and fixed, meanwhile, the black adhesive film strips 5 are fixed on the front surfaces of the bus bars 4 in a spot welding mode and are overlapped with the sheet gap adhesive film 2, the heat transfer to the bus bars 4 is continued through a welding pressure head of a stitch welding machine, the black adhesive film strips 5 are melted and fixed, and the battery strings are placed on the front plate adhesive film 6; and (3) laying a back plate adhesive film above the back surface of the battery string, covering back plate glass, and entering a laminating and framing process to finish the manufacturing of the photovoltaic module.
The utility model has been further described with reference to specific embodiments, but it should be understood that the detailed description is not to be construed as limiting the spirit and scope of the utility model, but rather as providing those skilled in the art with the benefit of this disclosure with the benefit of their various modifications to the described embodiments.
Claims (10)
1. A full black double-glass photovoltaic module is characterized in that:
the solar cell comprises a cell layer, wherein the cell layer comprises at least two cell strings, and the cell strings are formed by connecting at least two photovoltaic cells in series;
the front surface of the photovoltaic cell is free of grid lines;
the photovoltaic cell is characterized in that non-welding areas are arranged at two ends of the back of each photovoltaic cell, a sheet gap is arranged between two adjacent photovoltaic cells, a sheet gap film is arranged at the sheet gap, two sides of the sheet gap film are respectively connected with two adjacent non-welding areas, and the sheet gap film is black.
2. The full black dual-glass photovoltaic module according to claim 1, wherein: the back of the photovoltaic cell is provided with a P area welding spot and an N area welding spot which are distributed in a whole row, the P area welding spot and the N area welding spot are alternately distributed in a whole row, and the distance between the welding spot closest to the edge of the photovoltaic cell and the edge of the photovoltaic cell is a, and a is more than or equal to 6mm and less than or equal to 15mm.
3. The full black dual-glass photovoltaic module according to claim 1, wherein: the width of the non-welding area is b, and b is more than or equal to 4mm and less than or equal to 12mm.
4. The full black dual-glass photovoltaic module of claim 1, wherein: the sheet gap film comprises a substrate layer, an adhesive layer and a black functional coating layer arranged between the substrate layer and the adhesive layer, and the adhesive layer is adhered to the non-welding area.
5. The full black dual-glass photovoltaic module according to claim 4, wherein: the substrate layer is a black PET layer, and the thickness of the substrate layer is 40-70 mu m.
6. The full black dual-glass photovoltaic module according to claim 4, wherein: the adhesive layer is a transparent hot melt resin film, and the thickness of the adhesive layer is 30-60 mu m.
7. The full black dual-glass photovoltaic module of claim 1, wherein: the photovoltaic cell piece is connected two sides of the piece gap film are both first sides, two sides adjacent to the first sides are both second sides, and the vertical distance between two ends of the length direction of the piece gap film and the nearest second sides is d, and d is more than 0 and less than a.
8. The full black dual-glass photovoltaic module of claim 1, wherein: the back of battery string is provided with the welding strip that is connected with each photovoltaic cell piece, and the welding strip front and the head and the tail between the adjacent two battery strings the welding strip front in the outside of battery string is provided with the busbar, the front of busbar is provided with black plastic film strip, black plastic film strip overlap joint is in on the piece gap pad pasting, and covers the busbar.
9. The full black dual-glass photovoltaic module of claim 8, wherein: the length of the black adhesive film strip is greater than the length of the bus bar.
10. The full black dual-glass photovoltaic module of claim 1, wherein: the front surface of the battery string is provided with front plate glass, the front plate glass is bonded with the battery string through a front plate adhesive film, the back surface of the battery string is provided with back plate glass, and the back plate glass is bonded with the battery string through a back plate adhesive film; the back plate adhesive film is a black adhesive film, and the back plate glass is common transparent glass; or the back plate adhesive film is a transparent adhesive film, and the back plate glass is black glazed glass.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223059006.5U CN219106170U (en) | 2022-11-14 | 2022-11-14 | Full-black double-glass photovoltaic module |
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| CN202223059006.5U CN219106170U (en) | 2022-11-14 | 2022-11-14 | Full-black double-glass photovoltaic module |
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| CN219106170U true CN219106170U (en) | 2023-05-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117276385B (en) * | 2023-11-20 | 2024-03-29 | 中能创光电科技(常州)有限公司 | Reworkable film-covered photovoltaic cell string, photovoltaic module and preparation method thereof |
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2022
- 2022-11-14 CN CN202223059006.5U patent/CN219106170U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117276385B (en) * | 2023-11-20 | 2024-03-29 | 中能创光电科技(常州)有限公司 | Reworkable film-covered photovoltaic cell string, photovoltaic module and preparation method thereof |
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