Photovoltaic module

Abstract

The utility model discloses a photovoltaic module, which comprises a photovoltaic cell module, a back plate and an edge sealing strip, a honeycomb core is arranged in the back plate, the photovoltaic cell module and the back plate are sequentially stacked, and the edge sealing strip covers the peripheral side walls of the photovoltaic cell module and the back plate. And the edge sealing strip is adhered to the peripheral side walls of the photovoltaic cell module and the back plate. According to the photovoltaic assembly of the utility model, the structural rigidity and strength of the photovoltaic assembly are effectively ensured, and the weight of the photovoltaic assembly is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, in particular to a photovoltaic component. Background Art

[0002] With the implementation of my country's dual carbon strategy, the application of distributed photovoltaic power stations is becoming more and more widespread. At present, most rigid photovoltaic modules with glass packaging and metal frames are heavy. However, new photovoltaic application scenarios such as low-load-bearing roofs and automotive photovoltaics have put forward higher requirements on the weight of photovoltaic modules. In recent years, researchers have prepared flexible photovoltaic modules by replacing photovoltaic glass with high-strength photovoltaic front panels to reduce the weight of photovoltaic modules. However, flexible photovoltaic modules have low mechanical strength and are prone to deformation and breakage; at the same time, the flexible packaging material is a laminated structure, which is expensive and has a complex manufacturing process. Utility Model Content

[0003] In view of the deficiencies of the above-mentioned related technologies, the purpose of the present utility model is to provide a photovoltaic module, which effectively ensures the structural rigidity of the photovoltaic module and reduces the weight of the photovoltaic module.

[0004] The utility model provides a photovoltaic component, comprising a photovoltaic cell module, a back plate and an edge banding strip, wherein a honeycomb core is arranged in the back plate, the photovoltaic cell module and the back plate are stacked in sequence, the edge banding strip covers the photovoltaic cell module and the surrounding side walls of the back plate, and the edge banding strip is bonded to the surrounding side walls of the photovoltaic cell module and the back plate.

[0005] Optionally, the edge banding strip is a special engineering plastic or a metal thin layer edge banding strip.

[0006] Optionally, the special engineering plastic edge banding includes at least one of a fiber material edge banding, a polyvinyl chloride edge banding, a polytetrafluoroethylene edge banding, a polyamide edge banding, a polyethersulfone edge banding, a polyetheretherketone edge banding and a polyphenylene sulfone resin edge banding; the metal thin layer edge banding includes at least one of an aluminum thin layer edge banding and an iron thin layer edge banding.

[0007] Optionally, the back panel further includes a first panel and a second panel, the first panel, the honeycomb core and the second panel are stacked in sequence, and the first panel is located between the photovoltaic cell module and the honeycomb core.

[0008] Optionally, the photovoltaic cell module comprises a stacked encapsulation layer and a photovoltaic cell unit, and the encapsulation layer is arranged on a side of the photovoltaic cell unit away from the back plate.

[0009] Optionally, the encapsulation layer is a transparent polymer encapsulation layer.

[0010] Optionally, the transparent polymer encapsulation layer includes at least one of an ethylene-tetrafluoroethylene copolymer encapsulation layer, a colorless transparent polyimide encapsulation layer and a transparent polyethylene terephthalate encapsulation layer;

[0011] The first panel includes at least one of a polyethylene terephthalate-based composite panel and a polyimide-based composite panel;

[0012] The second panel includes at least one of an aluminum panel, a polyethylene terephthalate-based composite panel, a polyimide-based composite panel, and a special engineering plastic panel;

[0013] The honeycomb core includes at least one of a metal honeycomb structure, a polymer honeycomb structure, a glass cloth honeycomb structure and a plastic honeycomb structure.

[0014] Optionally, the thickness of the edge banding strip is 0.03 mm to 2 mm; the thickness of the encapsulation layer is 0.03 mm to 1.0 mm; the thickness of the first panel is 0.03 mm to 2 mm; the thickness of the second panel is 0.03 mm to 2 mm; and the thickness of the honeycomb core is 3 mm to 30 mm.

[0015] Optionally, it also includes a junction box for electrically connecting to the photovoltaic cell module, and the junction box is arranged on a side of the second panel away from the honeycomb core or is arranged inside the back panel.

[0016] Optionally, the junction box is arranged on a side of the second panel away from the honeycomb core or is embedded in the honeycomb core.

[0017] The photovoltaic module of the utility model adopts a back plate with a honeycomb core and eliminates the metal frame, thereby ensuring the structural rigidity of the photovoltaic module and reducing the weight of the photovoltaic module; further adopts special engineering plastics or metal thin layer edge banding strips to effectively ensure the structural rigidity of the photovoltaic module and significantly reduce the weight of the photovoltaic module, thereby obtaining a lightweight and rigid photovoltaic module to avoid deformation and breakage; eliminates glass packaging and adopts lightweight and rigid packaging materials to further reduce the weight of the lightweight and rigid module; adopts a lightweight first panel, a second panel, a honeycomb core and an adhesive layer to ensure the rigidity of the photovoltaic module and greatly reduce the weight. The lightweight and rigid photovoltaic module can be directly applied to distributed application scenarios such as rooftop photovoltaics or automotive photovoltaics, and can also be applied to large photovoltaic power stations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a photovoltaic module according to an embodiment of the utility model;

[0019] Figure 2 It is a schematic structural diagram of a photovoltaic assembly according to another embodiment of the utility model.

[0020] Explanation of the accompanying drawings: 1-encapsulation layer; 2-first adhesive layer; 3-photovoltaic cell unit; 4-second adhesive layer; 5-first panel; 6-third adhesive layer; 7-honeycomb core; 8-fourth adhesive layer; 9-second panel; 10-edge banding; 11-junction box. DETAILED DESCRIPTION

[0021] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the relevant drawings. The drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood.

[0022] The following descriptions of the embodiments are with reference to the attached diagrams, which are used to illustrate specific embodiments in which the present invention can be implemented. The serial numbers of the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention include direct and indirect connections (couplings) unless otherwise specified. The directional terms mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "side", etc., are only with reference to the directions of the attached diagrams. Therefore, the directional terms used are for better and clearer explanation and understanding of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] In the description of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be fixedly connected, detachably connected, or integrally connected; it can be mechanically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances. It should be noted that the terms "first", "second" and the like in the specification and claims of the utility model and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including", "may include", "include", or "may include" used in the utility model indicate the existence of the corresponding functions, operations, elements, etc. disclosed, and do not limit one or more other functions, operations, elements, etc. In addition, the terms "including" or "include" indicate the existence of the corresponding features, numbers, steps, operations, elements, components or combinations thereof disclosed in the specification, and do not exclude the existence or addition of one or more other features, numbers, steps, operations, elements, components or combinations thereof, and are intended to cover non-exclusive inclusions.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0025] See also Figure 1 and Figure 2 As shown, this embodiment discloses a photovoltaic assembly, including a photovoltaic cell module, a back plate and an edge banding strip 10, wherein a honeycomb core 7 is arranged in the back plate, the photovoltaic cell module and the back plate are stacked in sequence, the edge banding strip 10 covers the photovoltaic cell module and the surrounding side walls of the back plate, and the edge banding strip is bonded to the surrounding side walls of the photovoltaic cell module and the back plate. The honeycomb core 7 is a honeycomb structure. The parameters such as the cell shape, side length, and thickness of the honeycomb core 7 should be designed according to the specific application environment conditions.

[0026] By using a back panel with a honeycomb core, eliminating the metal frame, and using special engineering plastics or metal thin layer edge banding strips, the structural rigidity of the photovoltaic module is effectively guaranteed, and the weight of the photovoltaic module is significantly reduced, resulting in a lightweight and rigid photovoltaic module. The lightweight and rigid photovoltaic module can be directly applied to distributed application scenarios such as rooftop photovoltaics or automotive photovoltaics, and can also be applied to large photovoltaic power stations.

[0027] In this embodiment, the edge banding strip 10 is a special engineering plastic or metal thin layer edge banding strip.

[0028] In this embodiment, the special engineering plastic edge banding includes at least one of a fiber material edge banding, a polyvinyl chloride edge banding, a polytetrafluoroethylene edge banding, a polyamide edge banding, a polyethersulfone edge banding, a polyetheretherketone edge banding, and a polyphenylene sulfone resin edge banding. The special engineering plastic edge banding may also be other types of special engineering plastic edge bandings, which are not limited here. The metal thin layer edge banding includes at least one of an aluminum thin layer edge banding and an iron thin layer edge banding; optionally, the metal thin layer edge banding is an aluminum thin layer edge banding.

[0029] In this embodiment, the photovoltaic cell module includes a stacked packaging layer 1 and a photovoltaic cell unit 3, wherein the packaging layer 1 is arranged on a side of the photovoltaic cell unit 3 away from the back plate. The photovoltaic cell unit 3 is a cell string formed by welding multiple solar cells into a cell string through welding strips, connecting sheets, etc.

[0030] In this embodiment, the encapsulation layer 1 is a transparent polymer encapsulation layer. The transparent polymer encapsulation layer includes at least one of an ethylene-tetrafluoroethylene copolymer (ETFE) encapsulation layer, a colorless transparent polyimide encapsulation layer (CPI) and a transparent polyethylene terephthalate encapsulation layer (transparent PET). The transparent polymer encapsulation layer buffers the external mechanical impact of the photovoltaic cell module and isolates the solar cell from direct contact with the outside world.

[0031] In this embodiment, the back panel further includes a first panel 5 and a second panel 9, wherein the first panel 5, the honeycomb core 7 and the second panel 9 are stacked in sequence, and the first panel 5 is located between the photovoltaic cell module and the honeycomb core 7. The first panel 5 is a honeycomb core structure shaping layer and a supporting layer for the photovoltaic cell module, and also serves to isolate water vapor and ensure insulation between the photovoltaic cell unit 3 and the honeycomb core 7. The second panel 9 is a honeycomb core structure shaping layer, and at the same time isolates the honeycomb core 7 from direct contact with the outside world.

[0032] In this embodiment, the first panel 5 includes at least one of a polyethylene terephthalate-based composite board and a polyimide-based composite board.

[0033] The second panel 9 includes at least one of an aluminum panel, a polyethylene terephthalate-based composite panel, a polyimide-based composite panel, and a special engineering plastic panel. The special engineering plastic panel may be a polytetrafluoroethylene plastic panel, a polyamide plastic panel, a polyethersulfone plastic panel, a polyetheretherketone plastic panel, a polyphenylene sulfone resin plastic panel, or other types of special engineering plastic panels, which are not limited here. The polyethylene terephthalate-based composite panel is made of a polyethylene terephthalate (PET)-based composite material. The polyimide-based composite panel is made of a polyimide (PI)-based composite material. The special engineering plastic panel is similar and will not be described in detail here.

[0034] The honeycomb core 7 includes at least one of a metal honeycomb structure, a polymer honeycomb structure, a glass cloth honeycomb structure and a plastic honeycomb structure. The honeycomb core 7 of these materials has the characteristics of being light in weight and having good strength.

[0035] Exemplarily, the metal honeycomb structure is an aluminum honeycomb; in other embodiments, the metal honeycomb structure is a tin honeycomb or a honeycomb core made of other types of metal materials, which is not limited here.

[0036] For example, the polymer honeycomb structure is an aramid paper honeycomb, but the invention is not limited thereto. The aramid paper honeycomb is lightweight and has excellent ultra-high strength.

[0037] The photovoltaic cell unit 3 and the back plate are connected via a second adhesive layer 4;

[0038] The first panel 5 and the honeycomb core 7 are connected by a third adhesive layer 6;

[0039] The honeycomb core 7 and the second panel 9 are connected via a fourth adhesive layer 8;

[0040] The encapsulation layer 1 and the photovoltaic cell unit 3 are connected via a first adhesive layer 2 .

[0041] The first adhesive layer 2 , the second adhesive layer 4 , the third adhesive layer 6 and the fourth adhesive layer 8 are all light adhesive films.

[0042] The first adhesive layer 2 ensures that the encapsulation layer 1 is firmly bonded to the photovoltaic cell unit 3. The first adhesive layer 2 includes at least one of POE adhesive film, EVA adhesive film, polyvinyl butyral (PVB) adhesive film, polyurethane adhesive, and epoxy resin adhesive;

[0043] The second adhesive layer 4 ensures that the photovoltaic cell unit 3 and the back plate are firmly bonded. The second adhesive layer 4 includes at least one of POE adhesive film, EVA adhesive film, polyvinyl butyral (PVB) adhesive film, polyurethane adhesive, and epoxy resin adhesive;

[0044] The third adhesive layer 6 ensures that the first panel 5 is firmly bonded to the honeycomb core 7. The third adhesive layer 6 includes at least one of POE adhesive film, EVA adhesive film, polyvinyl butyral (PVB) adhesive film, polyurethane adhesive, and epoxy resin adhesive;

[0045] The fourth adhesive layer 8 ensures that the honeycomb core 7 is firmly bonded to the second panel 9. The fourth adhesive layer 8 includes at least one of POE adhesive film, EVA adhesive film, polyvinyl butyral (PVB) adhesive film, polyurethane adhesive, and epoxy resin adhesive.

[0046] When the special engineering plastic edge banding includes multiple materials, it means a laminated film of these materials, and has the advantages of these materials. For example, the special engineering plastic edge banding includes a fiber material edge banding and a polyvinyl chloride edge banding, so the special engineering plastic edge banding is a laminated film packaging strip of the fiber material edge banding and the polyvinyl chloride edge banding. When the packaging layer 1, the first panel 5, the second panel 9, the honeycomb core 7, the first adhesive layer 2, the second adhesive layer 4, the third adhesive layer 6 and the fourth adhesive layer 8 respectively include multiple materials, the same principle applies and will not be repeated here.

[0047] In this embodiment, a surface of the second panel 9 away from the honeycomb core 7 is coated with a weather-resistant coating.

[0048] In this embodiment, the thickness of the edge banding strip 10 is 0.03mm to 2mm; the thickness of the packaging layer 1 is 0.03mm to 1.0mm; the thickness of the first panel 5 is 0.03mm to 2mm; the thickness of the second panel 9 is 0.03mm to 2mm; and the thickness of the honeycomb core 7 is 3mm to 30mm. Optionally, the thickness of the packaging layer 1 is 0.03mm or 0.1mm or 0.3mm or 1mm. The thickness of the first panel 5 is 0.03mm or 0.05mm or 0.5mm or 1.0mm or 2mm; the thickness of the second panel 9 is 0.03mm or 0.05mm or 0.5mm or 1.0mm or 2mm; and the thickness of the honeycomb core 7 is 3mm or 4mm or 5mm or 10mm or 15mm or 20mm or 30mm. For example, the thickness of the packaging layer 1 is 0.03mm, the thickness of the first panel 5 is 0.03mm, the thickness of the second panel 9 is 0.03mm, and the thickness of the honeycomb core 7 is 3mm, so that the photovoltaic module of the utility model has strong rigidity and significantly reduces the weight. Optionally, the thickness of the edge band is 0.5mm; the thickness of the packaging layer is 0.1mm; the thickness of the first panel is 0.5mm; the thickness of the second panel is 0.5mm; the thickness of the honeycomb core is 10mm. Under this structure, the surface density of the lightweight rigid module is about 5.2kg / m 2 , compressive strength is not less than 30kPa.

[0049] In this embodiment, a junction box 11 for electrically connecting to the photovoltaic cell module is further included. The junction box 11 is arranged on a side of the back plate away from the photovoltaic cell module or inside the back plate.

[0050] In this embodiment, the junction box 11 is disposed on a side of the second panel 9 away from the honeycomb core 7 or is embedded in the honeycomb core 7 .

[0051] When the junction box 11 is installed inside the photovoltaic module, Figure 1As shown, it is necessary to perform a slotting process for the installation position of the junction box 11. Generally, the method of slotting first and then laminating is adopted. First, the honeycomb core 7, the fourth adhesive layer 8 and the second panel 9 are slotted at the position corresponding to the junction box 11, and the outer shell of the junction box 11 is buried. After lamination and fixing, the internal components of the junction box 11 are installed and potting is performed.

[0052] In another embodiment, the junction box 11 may be installed by laminating first and then slotting. Specifically, after laminating, the honeycomb core 7 corresponding to the junction box 11 is removed by CNC machining to form a junction box installation slot, and then the adhesive is poured, the complete junction box 11 is buried, and cured. The size and depth of the slots in the honeycomb core 7 should be determined according to the size of the selected junction box 11.

[0053] In another embodiment, if Figure 2 As shown, a junction box 11 is arranged on the photovoltaic module after edge sealing, and the steps include: gluing or screwing the junction box 11 to the back side of the photovoltaic module after edge sealing.

[0054] The back plate is provided with a plurality of mounting holes or pre-buried with a plurality of connectors for mounting and fixing on a side away from the photovoltaic cell module. The mounting holes or connectors are arranged at the edge of the back plate. Specifically, the mounting holes or connectors are arranged at the four sides or four corners of the back plate. The mounting holes or connectors ensure the subsequent mounting and fixing of the photovoltaic module.

[0055] The photovoltaic cell unit 3 is a power generation unit of a power component, and may adopt various types of cells such as silicon cells, cadmium telluride cells, copper indium gallium selenide cells, perovskite cells, perovskite stacked cells, and perovskite silicon stacked cells.

[0056] In this embodiment, the edge banding strip 10 is bonded to the surrounding side walls of the photovoltaic cell module and the back plate. In some embodiments, the edge banding strip 10 can also be connected by riveting, screwing or clamping. Specifically, the edge banding strip 10 is bonded to the surrounding side walls of the photovoltaic cell module and the back plate by foam glue or hot melt glue. In some embodiments, the edge banding strip 10 can also be bonded to the surrounding side walls of the photovoltaic cell module and the back plate by other adhesive materials.

[0057] The photovoltaic module of the utility model adopts a back plate with a honeycomb core and eliminates the metal frame, thereby ensuring the structural rigidity of the photovoltaic module and reducing the weight of the photovoltaic module; further adopts special engineering plastics or metal thin layer edge banding strips to effectively ensure the structural rigidity of the photovoltaic module and significantly reduce the weight of the photovoltaic module, thereby obtaining a lightweight and rigid photovoltaic module to avoid deformation and breakage; eliminates glass packaging and adopts lightweight and rigid packaging materials to further reduce the weight of the photovoltaic module; adopts a lightweight first panel, a second panel, a honeycomb core and an adhesive layer to ensure the rigidity of the photovoltaic module and greatly reduce the weight. The lightweight and rigid photovoltaic module can be directly applied to distributed application scenarios such as roof photovoltaics or automotive photovoltaics, and can also be applied to large photovoltaic power stations.

[0058] It should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0059] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0060] It should be understood that the application of the utility model is not limited to the above examples. For ordinary technicians in the field, they can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model. Ordinary technicians in the field can understand that all or part of the processes of the above embodiments are implemented, and equivalent changes made according to the claims of the present invention still fall within the scope of the present invention.

Claims

1. A photovoltaic module, characterized in that: It includes a photovoltaic cell module, a back plate and an edge banding strip, wherein a honeycomb core is arranged inside the back plate, the photovoltaic cell module and the back plate are stacked in sequence, the edge banding strip covers the photovoltaic cell module and the surrounding side walls of the back plate, and the edge banding strip is bonded to the surrounding side walls of the photovoltaic cell module and the back plate.

2. The photovoltaic module according to claim 1, characterized in that: The edge banding strip is a special engineering plastic or a metal thin layer edge banding strip.

3. The photovoltaic module according to claim 2, characterized in that: The special engineering plastic edge banding strips include at least one of fiber material edge banding strips, polyvinyl chloride edge banding strips, polytetrafluoroethylene edge banding strips, polyamide edge banding strips, polyether sulfone edge banding strips, polyether ether ketone edge banding strips and polyphenylene sulfone resin edge banding strips; the metal thin layer edge banding strips include at least one of aluminum thin layer edge banding strips and iron thin layer edge banding strips.

4. The photovoltaic module according to claim 1, characterized in that: It also includes a junction box for electrically connecting to the photovoltaic cell module. The junction box is arranged on a side of the back plate away from the photovoltaic cell module or inside the back plate.

5. The photovoltaic module according to claim 4, characterized in that: The back panel further includes a first panel and a second panel. The first panel, the honeycomb core and the second panel are stacked in sequence. The first panel is located between the photovoltaic cell module and the honeycomb core.

6. The photovoltaic module according to claim 5, characterized in that: The photovoltaic cell module comprises a stacked packaging layer and a photovoltaic cell unit, wherein the packaging layer is arranged on a side of the photovoltaic cell unit away from the back plate.

7. The photovoltaic module according to claim 6, characterized in that: The encapsulation layer is a transparent polymer encapsulation layer.

8. The photovoltaic module according to claim 7, characterized in that: The first panel includes at least one of a polyethylene terephthalate-based composite panel and a polyimide-based composite panel; The second panel includes at least one of an aluminum panel, a polyethylene terephthalate-based composite panel, a polyimide-based composite panel, and a special engineering plastic panel; The honeycomb core comprises at least one of a metal honeycomb structure, a polymer honeycomb structure, a glass cloth honeycomb structure and a plastic honeycomb structure; The transparent polymer encapsulation layer includes at least one of an ethylene-tetrafluoroethylene copolymer encapsulation layer, a colorless transparent polyimide encapsulation layer and a transparent polyethylene terephthalate encapsulation layer.

9. The photovoltaic module according to any one of claims 6 to 8, characterized in that: The thickness of the edge banding is 0.03 mm to 2 mm; the thickness of the packaging layer is 0.03 mm to 1.0 mm; the thickness of the first panel is 0.03 mm to 2 mm; the thickness of the second panel is 0.03 mm to 2 mm; and the thickness of the honeycomb core is 3 mm to 30 mm.

10. The photovoltaic module according to claim 5, characterized in that: The junction box is arranged on a side of the second panel away from the honeycomb core or embedded in the honeycomb core.

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