Photovoltaic components, photovoltaic modules and photovoltaic systems

Abstract

This application provides a photovoltaic component, a photovoltaic module, and a photovoltaic system. The photovoltaic component includes a photovoltaic panel and a junction box. The photovoltaic panel includes a first connecting portion, a body portion, and a second connecting portion. In the width direction, the first connecting portion and the second connecting portion are located on opposite sides of the body portion. The first connecting portion has a first groove, and the second connecting portion has a second groove. The junction box is electrically connected to the photovoltaic panel and is disposed in the first groove and / or the second groove. The junction box is located in the first groove and / or the second groove, which provides partial protection for the junction box and can also hide the junction box, maintaining the aesthetics of the photovoltaic component. The first groove and / or the second groove can serve as cable management channels, allowing cables electrically connected to the junction box to connect and pass through, providing directional guidance and fixed support for the cables, enabling the cables to be arranged regularly along the first groove and / or the second groove.

Description

Technical Field

[0001] This application relates to the field of photovoltaic technology, specifically to a photovoltaic device, photovoltaic module, and photovoltaic system. Background Technology

[0002] A photovoltaic (PV) system is a product that generates electricity using solar energy while also providing shade, heat insulation, and rain protection. It can be applied to outdoor public areas, the perimeter of large commercial facilities, or the courtyards of private residences. The junction box collects the electrical energy generated by the PV panels and transmits it to external devices via wires. In current technology, junction boxes are typically installed directly on the back or side of the PV panels, in a relatively exposed position. This makes them susceptible to external environmental factors, such as excessively high temperatures from direct sunlight or short circuits caused by rain, thus reducing the junction box's lifespan and reliability, and also affecting the overall aesthetics of the PV system. Utility Model Content

[0003] In view of the above problems, this application provides a photovoltaic component, a photovoltaic module, and a photovoltaic system.

[0004] The photovoltaic component provided in this application includes a photovoltaic panel and a junction box. The photovoltaic panel includes a first connecting portion, a body portion, and a second connecting portion. In the width direction, the first connecting portion and the second connecting portion are respectively located on opposite sides of the body portion. The first connecting portion has a first groove, and the second connecting portion has a second groove. The junction box is electrically connected to the photovoltaic panel and is disposed in the first groove and / or the second groove.

[0005] In some embodiments, the photovoltaic panel includes a light-facing side and a back-facing side facing away from each other, the light-facing side having a battery layer, and the openings of the first groove and the second groove being closer to the light-facing side.

[0006] In some embodiments, the size of the battery layer in the height direction is not greater than the size of the first groove and / or the second groove.

[0007] In some embodiments, the size of the body portion in the width direction is not less than the size of the first groove and / or the second groove, and the width direction is perpendicular to the length direction.

[0008] In some embodiments, the first groove includes a first sub-part, a second sub-part, and a third sub-part. The first sub-part extends from the body portion along the width direction, and the second and third sub-parts are connected to opposite ends of the first sub-part in the width direction and extend in the height direction. The second sub-part is closer to the body portion than the third sub-part.

[0009] In some embodiments, the second groove includes a first sub-segment, a second sub-segment, and a third sub-segment. The first sub-segment extends from the body portion along the width direction, and the second and third sub-segments are connected to opposite ends of the first sub-segment in the width direction and extend in the height direction. The second sub-segment is closer to the body portion than the third sub-segment.

[0010] In some embodiments, the second sub-section is provided with a first opening, which is configured to allow the junction box to pass through.

[0011] In some embodiments, the second segment is provided with a second opening configured for the junction box to pass through.

[0012] In some embodiments, the junction box includes a first part and a second part, the first part being disposed in the first groove and the second part being disposed in the second groove.

[0013] The photovoltaic module provided in this application includes at least two photovoltaic elements as described in any one of the embodiments. The photovoltaic module also includes a cover plate. In the width direction, in two adjacent photovoltaic panels, the cover plate is configured such that at least a portion is accommodated in a second groove of one photovoltaic element, and at least another portion is accommodated in a first groove of the other photovoltaic element. The two adjacent photovoltaic panels are connected by the cover plate.

[0014] In some embodiments, the projection of the junction box is located within the projection of the cover plate in a projection plane perpendicular to the height direction.

[0015] In some embodiments, the cover plate includes a body plate, a first sub-protrusion, and a second sub-protrusion, the first sub-protrusion and the second sub-protrusion being spaced apart on the body plate. In two adjacent photovoltaic panels, the first sub-protrusion is configured to be received in a second groove of one photovoltaic element and form a gap fit, and the second sub-protrusion is configured to be received in a first groove of another photovoltaic element and form a gap fit.

[0016] This application also provides a photovoltaic system, which includes a support component and a photovoltaic module as described in any of the above embodiments.

[0017] In the photovoltaic components, modules, and systems of this application, the junction box is located within a first recess and / or a second recess. The first and / or second recesses provide partial protection for the junction box, preventing damage from external forces and thus extending its lifespan. The first and / or second recesses also conceal the junction box, maintaining the aesthetics of the photovoltaic components. The first and / or second recesses can serve as cable management channels, allowing cables electrically connected to the junction box to connect and pass through them. This conceals the cables, maintaining the aesthetics of the photovoltaic components, and provides directional guidance and support for the cables, enabling them to be arranged regularly within the first and / or second recesses. This ensures smooth cable routing between junction boxes of adjacent photovoltaic components and improves the neatness of the cable wiring. The physical boundaries of the first and / or second recesses (such as the inner walls of the first and second recesses) naturally constrain the cables, limiting cable movement during installation or operation and extending their lifespan.

[0018] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0019] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0020] Figure 1 This is a three-dimensional schematic diagram of a photovoltaic system according to some embodiments of this application;

[0021] Figure 2 for Figure 1 A plan view of a photovoltaic module in the photovoltaic system shown;

[0022] Figure 3 for Figure 1 A plan view of another photovoltaic module in the photovoltaic system shown;

[0023] Figure 4 for Figure 2 A three-dimensional schematic diagram of the photovoltaic components in the photovoltaic module shown;

[0024] Figure 5 for Figure 1 The diagram shows a three-dimensional schematic of another type of photovoltaic component in the photovoltaic system.

[0025] The attached icons are numbered as follows:

[0026] Photovoltaic system 10000; photovoltaic module 1000; support component 3000; photovoltaic element 100; photovoltaic panel 10; body part 11; first connecting part 12; first groove 121; first sub-part 123; second sub-part 125; first opening 1251; third sub-part 127; second connecting part 14; second groove 141; first segment 143; second segment 145; second opening 1451; third segment 147; light-facing surface 101; backlight surface 103; battery layer 18; junction box 30; first split 31; second split 32; cover plate 70; body plate 71; first sub-protrusion 72; second sub-protrusion 73. Detailed Implementation

[0027] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0029] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0030] In this document, the term "implementation" means that a specific feature, structure, or characteristic described in connection with an implementation may be included in at least one implementation of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same implementation, nor is it a separate or alternative implementation mutually exclusive with other implementations. It will be explicitly and implicitly understood by those skilled in the art that the implementations described herein can be combined with other implementations.

[0031] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, the simultaneous existence of the support arm, connecting arm, and cable tray, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following associated objects have an "or" relationship.

[0032] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple groups" refers to two or more (including two groups), and "multiple pieces" refers to two or more (including two pieces).

[0033] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "level", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0034] In the description of the embodiments of this application, unless otherwise explicitly specified and limited, the technical terms such as "installation", "connection", "linking", and "fixing" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components.

[0035] Please see Figure 1 The photovoltaic system 10000 is a photovoltaic product capable of generating electricity using solar energy, while also providing functions such as shading, heat insulation, and rain protection. The photovoltaic system 10000 can be applied to outdoor public areas, the perimeter of large commercial facilities, or private residences. For example, the photovoltaic system 10000 can be installed on a roof. This application uses a rooftop photovoltaic system 10000 as an example for illustration. The photovoltaic system 10000 includes a support component 3000 and photovoltaic modules 1000, with the photovoltaic modules 1000 mounted on the support component 3000.

[0036] The support component 3000 is a structure in the photovoltaic system 10000 that provides installation and support for the photovoltaic modules 1000. The support component 3000 can be made of metallic and / or non-metallic materials. Metallic materials include, but are not limited to, aluminum, iron, steel, or aluminum alloys, while non-metallic materials include, but are not limited to, plastics. For example, the support component 3000 can be made of metallic materials, such as aluminum alloy. This improves the structural strength of the support component 3000, enhances the photovoltaic system 10000's ability to withstand external environmental conditions (such as wind, rain, and snow), and ensures the stability and reliability of the photovoltaic system 10000's operation. It should be noted that in some embodiments, the overall shape of the support component 3000 may include, but is not limited to, square, cylindrical, and rhomboid shapes. This allows the support component 3000 to adapt to photovoltaic modules 1000 of different sizes and shapes. For example, the support component 3000 can be a structural component such as a roof column, beam, or purlin to provide a stable support platform for the photovoltaic module 1000, so that the photovoltaic module 1000 can be installed on the roof, other locations of the house besides the roof, or other carriers. The photovoltaic module 1000 can be directly or indirectly installed on the support component 3000 through mounting components, etc.

[0037] Furthermore, in some embodiments, the photovoltaic system 10000 also includes an energy storage device electrically connected to the photovoltaic module 1000. The energy storage device can store the electrical energy generated by the photovoltaic module 1000 and can power loads such as household appliances and portable devices. Of course, the photovoltaic module 1000 can also directly power loads such as household appliances and portable devices. The energy storage device and the photovoltaic module 1000 can be electrically connected via cables or through intermediate devices such as junction boxes or busbars. It should be noted that in some embodiments, the energy storage device can be not only a lithium-ion battery, lead-acid battery, or other types of rechargeable batteries, but also a device capable of storing and releasing electrical energy, such as a supercapacitor.

[0038] Please see Figure 2 or Figure 3 The photovoltaic module 1000 includes a photovoltaic element 100, which is a solar energy conversion device that converts solar energy into electrical energy. The photovoltaic element 100 can be different types of solar energy conversion devices, such as monocrystalline silicon, polycrystalline silicon, or thin-film solar cells. Users can select photovoltaic panels 10 of different efficiencies and sizes according to their needs and the supporting module 3000. In this application, the length direction of the photovoltaic element 100 is defined as the length direction X, the width direction as the width direction Y, and the height direction as the height direction Z. It should be noted that the height direction Z of the photovoltaic element 100 refers to the height direction of the body portion 11 of the photovoltaic element 100 mentioned below.

[0039] The photovoltaic module 1000 includes at least two photovoltaic elements 100. Specifically, at least two photovoltaic elements 100 can be connected together in a specific direction by overlapping or splicing to form an integral module (i.e., the photovoltaic module 1000). The photovoltaic module 1000 is mounted on the support component 3000, which on the one hand absorbs sunlight and converts solar energy into electrical energy for power generation, and on the other hand covers the support component 3000, reducing sunlight from reaching the interior of the photovoltaic system 10000, thus providing a shading effect. The interior of the photovoltaic system 10000 refers to the space located below the photovoltaic module 1000 and enclosed by the support component 3000. In some embodiments, the photovoltaic module 1000 can be installed on the support component 3000 using a detachable connection method, which facilitates the removal of the photovoltaic module 1000 from the support component 3000 when maintenance or replacement is required. The detachable connection method includes, but is not limited to, bolt connections and snap-fit ​​connections. In other embodiments, the photovoltaic module 1000 can be installed on the support component 3000 using a non-removable connection method. This can improve the bonding strength between the photovoltaic module 1000 and the support component 3000, enhance the photovoltaic system 10000's ability to resist external environmental factors, and ensure the stability and reliability of the photovoltaic system 10000's operation. The non-removable connection method includes, but is not limited to, bonding or welding.

[0040] For example, at least two photovoltaic elements 100 can be connected using fasteners (such as the cover plate 70 mentioned below), thereby making the assembled photovoltaic module 1000 more stable and improving the stability and reliability of the photovoltaic module 1000's operation. Alternatively, at least two photovoltaic elements 100 can be connected to each other by overlapping, which allows for faster and more convenient connection between adjacent photovoltaic elements 100, and facilitates the installation and disassembly of the photovoltaic elements 100, enabling faster and more efficient completion of work during installation and maintenance, thus improving work efficiency. It should be noted that in some embodiments, the at least two photovoltaic elements 100 may have the same shape and size, or they may be different. Users can select photovoltaic elements 100 of suitable shape and size according to specific usage requirements. For example, to adapt to the size of the carrier, users can select at least two photovoltaic elements 100 of different sizes.

[0041] Since the photovoltaic module 1000 in this embodiment includes the photovoltaic element 100, it is understood that the photovoltaic module 1000 includes at least the same beneficial effects as the photovoltaic element 100. Therefore, for the beneficial effects of the photovoltaic module 1000, please refer to the beneficial effects of the photovoltaic element 100 described below.

[0042] Please see Figure 4 or Figure 5The photovoltaic component 100 provided in this application includes a photovoltaic panel 10 and a junction box 30. The photovoltaic panel 10 includes a body portion 11, a first connecting portion 12, and a second connecting portion 14. In the width direction Y, the first connecting portion 12 and the second connecting portion 14 are respectively located on opposite sides of the body portion 11. The first connecting portion 12 has a first groove 121, and the second connecting portion 14 has a second groove 141. The junction box 30 is electrically connected to the photovoltaic panel 10, and the junction box 30 is disposed in the first groove 121 and / or the second groove 141.

[0043] Specifically, the photovoltaic panel 10 is the component in the photovoltaic element 100 that converts solar energy into electrical energy. The conversion process can be direct or indirect. Direct conversion means that the photovoltaic panel 10 can directly convert solar energy into electrical energy, while indirect conversion means that the photovoltaic panel 10 can convert solar energy into chemical energy or other energy forms before converting it into electrical energy. When multiple photovoltaic elements 100 are installed, the photovoltaic elements 100 are arranged sequentially along the length direction X and / or the width direction Y to cover the roof. Among them, the photovoltaic elements 100 arranged along the length direction X are connected sequentially.

[0044] The main body 11 is used to convert solar energy into electrical energy. The cross-sectional shape of the main body 11 in the XY plane may be, but is not limited to, regular or irregular shapes such as square, circle, triangle, and rhombus. In this embodiment, only a square cross-sectional shape of the photovoltaic panel 10 is used as an example for explanation. The main body 11 can transmit the converted electrical energy to the junction box 30, and the junction box 30 can then transmit the electrical energy to an external device, which may be an energy storage device capable of storing electrical energy.

[0045] The first connecting part 12 is connected to one end of the main body 11 in the width direction Y. The first connecting part 12 has a first groove 121, into which the junction box 30 can be installed and accommodated. The depth of the first groove 121 in the height direction Z can be adjusted according to actual design requirements. The cross-sectional shape of the first groove 121 cut by the YZ plane includes, but is not limited to, square, trapezoidal, semi-circular, and U-shaped shapes. The first groove 121 can communicate with the outside air, thereby increasing airflow. The interior of the first groove 121 can serve as a heat dissipation channel, dissipating some of the heat from the photovoltaic panel 10, improving heat dissipation, reducing the operating temperature of the photovoltaic element 100, and ensuring the photoelectric conversion efficiency of the photovoltaic element 100. The first groove 121 can be a sealed groove or an open groove. A sealed groove refers to the first groove 121 having sealed ends in the length direction X, thereby increasing the waterproof rating of the first groove 121 and preventing water from easily flowing into it. An open groove refers to a groove 121 that has no opening at at least at one end in the length direction X, thereby increasing airflow inside the groove 121 and further improving heat dissipation.

[0046] In some embodiments, the body portion 11 and the first connecting portion 12 are an integral structure, that is, the body portion 11 and the first connecting portion 12 are a single unit, thereby improving the bonding strength between the body portion 11 and the first connecting portion 12 and preventing separation of the body portion 11 and the first connecting portion 12 during the operation of the photovoltaic panel 10, thus ensuring the stability and reliability of the photovoltaic panel 10. In other embodiments, the body portion 11 and the first connecting portion 12 are separate structures, that is, the body portion 11 and the first connecting portion 12 are two different structures. In one example, the body portion 11 and the first connecting portion 12 can be joined together by a detachable connection method, including but not limited to snap-fit ​​connections or threaded connections. In another example, the body portion 11 and the first connecting portion 12 can be joined together by a non-detachable connection method, including but not limited to bonding or welding.

[0047] The second connecting part 14 is connected to one end of the main body 11 in the width direction Y. The second connecting part 14 has a second recess 41. The junction box 30 can be installed in the second recess 141 and accommodated inside the second recess 141. The depth of the second recess 141 in the height direction Z can be adjusted according to actual design requirements. The cross-sectional shape of the second recess 141 cut by the YZ plane includes, but is not limited to, square, trapezoidal, semi-circular, and U-shaped shapes. The second recess 141 can communicate with the outside air, thereby increasing airflow. The interior of the second recess 141 can serve as a heat dissipation channel, dissipating some of the heat from the photovoltaic panel 10, improving heat dissipation, reducing the operating temperature of the photovoltaic element 100, and ensuring the photoelectric conversion efficiency of the photovoltaic element 100. The second recess 141 can be a sealed recess or an open recess. A sealed recess refers to the second recess 141 having sealed ends in the length direction X, thereby increasing the waterproof rating of the second recess 141 and preventing water from easily flowing into the first recess. An open groove means that at least one end of the second groove 141 in the length direction X is not sealed, thereby increasing the air circulation inside the second groove 141 and further improving the heat dissipation effect.

[0048] Exemplarily, the first connecting portion 12 and the second connecting portion 14 of this application have the same structure and are respectively connected to both ends of the body portion 11 in the width direction Y. The identical structure of the first connecting portion 12 and the second connecting portion 14 facilitates molding and overlapping, improving the manufacturing efficiency of the photovoltaic component. It is understood that when the first connecting portion 12 and the second connecting portion 14 have the same structure, the first connecting portion 12 at least includes the beneficial effects of the second connecting portion 14, and the second connecting portion 14 at least includes the beneficial effects of the first connecting portion 12. Exemplarily, the first groove 121 and the second groove 141 of this application have the same structure and are respectively connected to both ends of the body portion 11 in the width direction Y. The identical structure of the first groove 121 and the second groove 141 facilitates molding and overlapping, improving the manufacturing efficiency of the photovoltaic component. It is understood that when the first groove 121 and the second groove 141 have the same structure, the first groove 121 at least includes the beneficial effects of the second groove 141, and the second groove 141 at least includes the beneficial effects of the first groove 121.

[0049] Junction box 30 is used to collect and transmit electrical energy generated by photovoltaic panel 10. Junction box 30 contains wires, terminals, etc., and can be connected to the cell layer 18 of photovoltaic panel 10. In photovoltaic module 1000, junction boxes 30 of different photovoltaic panels 10 can be connected in series or parallel via electrical connectors (e.g., cables). In this application, each photovoltaic module 100 includes at least one junction box 30. First recess 121 and / or second recess 141 are configured to accommodate the junction box 30 of at least one of two adjacent photovoltaic panels 10. That is, the first recess 121 and / or second recess 141 of a photovoltaic module 100 can accommodate its own junction box 30, or it can accommodate the junction box 30 of other photovoltaic modules 100. This application is illustrated with the first recess 121 and / or second recess 141 accommodating the junction box 30 of its own photovoltaic module 100. The photovoltaic module 100 can accommodate a junction box 30 in a first recess 121, a second recess 141, or both the first and second recesses 141. When both the first and second recesses 121 accommodate junction boxes 30, the number of junction boxes 30 accommodated in both recesses 121 and 141 can be the same or different. The first and / or second recesses 141 can also integrate auxiliary fixing structures (not shown), such as clips, strap grooves, or limiting protrusions, to further enhance the locking effect on the junction box 30 and cables, preventing them from detaching from their preset paths under dynamic environments such as strong winds and vibrations. This ensures the overall electrical connection stability and safety of the photovoltaic module 1000, while maintaining a clean and uniform appearance of the photovoltaic module 100, avoiding exposed junction boxes 30 and cables that could affect visual aesthetics or cause safety hazards.

[0050] The junction box 30 of this application is located within the first recess 121 and / or the second recess 141. The first recess 121 and / or the second recess 141 provide partial protection for the junction box 30, shielding it from sunlight and rain, and preventing damage from external forces. The first recess 121 and / or the second recess 141 also conceal the junction box 30, maintaining the aesthetics of the photovoltaic component 100. The first recess 121 and / or the second recess 141 can serve as cable management channels, allowing cables electrically connected to the junction box 30 to connect and pass through within them. This conceals the cables, maintaining the aesthetics of the photovoltaic component 100, and provides directional guidance and fixed support for the cables, enabling them to be arranged regularly within the first recess 121 and / or the second recess 141. This ensures smooth cable routing between junction boxes 30 connected to adjacent photovoltaic components 100, improving the neatness of the cable wiring. The physical boundaries of the first groove 121 and / or the second groove 141 (such as the inner wall of the first groove 121 and the inner wall of the second groove 141) can form a natural constraint on the cable, limiting the cable from shaking during installation or operation and extending the cable's service life.

[0051] Please see Figure 4 or Figure 5 In some embodiments, the photovoltaic panel 10 includes a light-facing surface 101 and a backlight surface 103 facing away from each other. The light-facing surface 101 is provided with a battery layer 18, and the openings of the first groove 121 and the second groove 141 are closer to the light-facing surface 101.

[0052] Specifically, along the height Z direction of the photovoltaic panel 10, the photovoltaic panel 10 includes a light-facing surface 101 and a back-lighting surface 103 facing away from each other. The light-facing surface 101 faces the external environment after the photovoltaic panel 10 is installed, allowing it to directly receive sunlight and perform photoelectric conversion. The back-lighting surface 103 faces away from the sun, preventing direct sunlight. The battery layer 18 consists of multiple battery cells. When sunlight shines on the battery layer 18, photon energy causes electrons in the battery cells to transition, thereby generating direct current (DC) power. The generated power is transmitted to the junction box 30 through connectors inside the photovoltaic panel 10. The junction box 30 collects the power generated by the battery cells and transmits it to an energy storage device or directly to a load via cables. Further, in some embodiments, the photovoltaic panel 10 also includes a first cover plate and a second cover plate. The first cover plate and the second cover plate are stacked sequentially in the direction from the light-facing surface 101 to the back-lighting surface 103, with the battery layer 18 connected between the first cover plate and the second cover plate. The first and second cover plates work together to protect the battery layer 18 and other internal components of the photovoltaic panel 10 from external physical impacts and environmental corrosion, reducing the possibility of damage to the photovoltaic panel 10. The battery layer 18, the first cover plate, and the second cover plate can be connected together by an adhesive film to form a stable and robust structure, improving the overall structural stability. It should be noted that in some embodiments, the first and second cover plates can be made of at least one of the following materials: glass, PET, metal, composite fiber, etc.; the adhesive film can be made of at least one of the following materials: EVA, POE, PVB, etc. The openings of the first groove 121 and the second groove 141 are closer to the light-facing surface 101, thereby making the backlight surface 103 of the photovoltaic panel 10 flatter. This allows the backlight surface 103 of the photovoltaic panel 10 to fit against the surface of the supporting component 3000, ensuring the stability of the photovoltaic panel 10 after installation and avoiding stress concentration problems caused by uneven installation surfaces or gaps. When the photovoltaic panel 10 is subjected to external environmental factors (such as wind pressure, snow accumulation, etc.), the flat design of the back surface 103 can make the force evenly distributed on the entire support component 3000, rather than concentrated in a certain local area, thereby reducing the risk of deformation or damage to the photovoltaic panel 10.

[0053] Please see Figure 2 or Figure 3 In some embodiments, the size H1 of the battery layer 18 in the height direction Z is not greater than the size H2 of the first groove 121 and / or the size H3 of the second groove 141.

[0054] Specifically, the size H1 of the battery layer 18 can be 1 / 6, 1 / 5, 1 / 4, 1 / 3, 2 / 5, 3 / 5, 2 / 3, 1 / 2, 3 / 4, or 4 / 5 of the size H2 of the first groove 121. The size H1 of the battery layer 18 can also be 1 / 6, 1 / 5, 1 / 4, 1 / 3, 2 / 5, 3 / 5, 2 / 3, 1 / 2, 3 / 4, or 4 / 5 of the size H3 of the second groove 141. If the size H1 of the battery layer 18 is larger than the size H2 of the first groove 121 and / or the size H3 of the second groove 141, then when operators perform installation, maintenance, or cleaning work on the photovoltaic panel 10, the battery layer 18 is easily damaged by being stepped on.

[0055] The dimension H1 of the battery layer 18 is not greater than the dimension H2 of the first groove 121 and / or the dimension H3 of the second groove 141, so that the first groove 121 and the second groove 141 can serve as load-bearing units. When operators perform installation, maintenance, or cleaning work on the photovoltaic panel 10, they will inevitably exert a certain amount of stepping force on the photovoltaic panel 10. Since the openings of the first groove 121 and the second groove 141 are close to the light-facing surface 101, that is, the first groove 12111 and the second groove 14114 protrude relative to the light-facing surface 101 in the height direction Z, the protruding part can disperse and bear the stepping force, preventing the battery layer 18 from being directly subjected to pressure and thus preventing damage, thereby extending the service life of the battery layer 18.

[0056] Please see Figure 2 or Figure 3 In some embodiments, the size L1 of the body portion 11 in the width direction Y is not less than the size L2 of the first groove 121.

[0057] Specifically, in the width direction Y, the size L1 of the body portion 11 can be 1.2 times, 2.2 times, 3 times, 3.4 times, 4.2 times, 5.5 times, 5.8 times, 6.1 times, 7.2 times, 9.2 times, etc., of the size L2 of the first groove 121, and is not limited in this application. If the size L1 of the body portion 11 is smaller than the size L2 of the first groove 121 in the width direction Y, the battery layer 18 of the body portion 11 will be insufficient, reducing the photoelectric conversion efficiency of the photovoltaic element 100. At the same time, when the photovoltaic element 100 is installed on the support component 3000, the body portion 11 is connected or abuts against the support component 3000. If the size L1 of the body portion 11 is too small, the connection area between the body portion 11 and the support component 3000 will be insufficient, and the photovoltaic element 100 will easily detach from the support component 3000 in extreme environments such as strong winds and snow accumulation.

[0058] The size L1 of the main body 11 is larger than the size L2 of the first groove 121, which can increase the laying area of ​​the battery layer 18 of the main body 11, improve the photoelectric conversion efficiency of the photovoltaic element 100, and also provide a larger contact area between the photovoltaic element 100 and the support component 3000, making the connection more solid and improving the structural stability of the photovoltaic module 1000, which can better resist the influence of external environmental factors such as wind, rain, and snow.

[0059] Please see Figure 2 or Figure 3 In some embodiments, the size L1 of the body portion 11 is larger than the size L3 of the second groove 141 in the width direction Y.

[0060] Specifically, in the width direction Y, the size L1 of the main body 11 can be 1.2 times, 2.2 times, 3 times, 3.4 times, 4.2 times, 5.5 times, 5.8 times, 6.1 times, 7.2 times, 9.2 times, etc., of the size L3 of the second groove 141, and is not limited in this application. If the size L1 of the main body 11 is smaller than the size L3 of the second groove 141 in the width direction Y, the battery layer 18 of the main body 11 will be insufficient, reducing the photoelectric conversion efficiency of the photovoltaic element 100. At the same time, when the photovoltaic element 100 is installed on the support component 3000, the main body 11 is connected or abuts against the support component 3000. If the size L1 of the main body 11 is too small, the connection area between the main body 11 and the support component 3000 will be insufficient, and the photovoltaic element 100 will easily detach from the support component 3000 in extreme environments such as strong winds and snow accumulation.

[0061] The size L1 of the main body 11 is larger than the size L3 of the second groove 141, which can increase the laying area of ​​the battery layer 18 of the main body 11, improve the photoelectric conversion efficiency of the photovoltaic element 100, and also provide a larger contact area between the photovoltaic element 100 and the support component 3000, making the connection more solid and improving the structural stability of the photovoltaic module 1000, which can better resist the influence of external environmental factors such as wind, rain, and snow.

[0062] Please see Figure 4 or Figure 5 In some embodiments, the first groove 121 includes a first sub-part 123, a second sub-part 125, and a third sub-part 127. The first sub-part 123 extends from the body part 11 along the width direction Y. The second sub-part 125 and the third sub-part 127 are connected to the opposite ends of the first sub-part 123 in the width direction Y and extend in the height direction Z. The second sub-part 125 is closer to the body part 11 than the third sub-part 127.

[0063] Specifically, the first sub-part 123 extends parallel to the body part 11 along the width direction Y. The second sub-part 125 and the third sub-part 127 are connected to the opposite ends of the first sub-part 123 in the width direction Y and extend in the height direction Z. The second sub-part 125 is closer to the body part 11 than the third sub-part 127. In this application, the first sub-part 123 and the body part 11 are integrally formed by rolling a portion of the body part 11, which can improve the connection strength between the first groove 121 and the body part 11. In other embodiments of this application, the first sub-part 123 can be separately formed from the body part 11. The first sub-part 123, the second sub-part 125, and the third sub-part 127 together form the first groove 121. The first groove 121 can form a relatively closed space with a certain depth. The first groove 121 can resist external pressure and impact, providing protection for the junction box 30 and improving the reliability and service life of the photovoltaic component 100.

[0064] Please see Figure 4 or Figure 5 In some embodiments, the second groove 141 includes a first sub-segment 143, a second sub-segment 145, and a third sub-segment 147. The first sub-segment 143 extends from the body portion 11 along the width direction Y. The second sub-segment 145 and the third sub-segment 147 are connected to the opposite ends of the first sub-segment 143 in the width direction Y and extend in the height direction Z. The second sub-segment 145 is closer to the body portion 11 than the third sub-segment 147.

[0065] Specifically, the first segment 143 extends parallel to the body portion 11 along the width direction Y. The second segment 145 and the third segment 147 are connected to the opposite ends of the first segment 143 in the width direction Y and extend in the height direction Z. The second segment 145 is closer to the body portion 11 than the third segment 147. In this application, the first segment 143 and the body portion 11 are integrally formed by rolling a portion of the body portion 11, which can improve the connection strength between the second groove 141 and the body portion 11. In other embodiments of this application, the first segment 143 can be separately formed from the body portion 11. The first segment 143, the second segment 145, and the third segment 147 together form the second groove 141. The second groove 141 can form a relatively closed space with a certain depth. The second groove 141 can resist external pressure and impact, providing protection for the junction box 30 and improving the reliability and service life of the photovoltaic component 100.

[0066] It should be noted that the structures of the first groove 121 and the second groove 141 can be the same or different, as can the structures of the second sub-part 125 and the second bending sub-part 143. That is, with the width midline of the photovoltaic element 100 as the center of symmetry, the first groove 121 and the second groove 141 can be symmetrical or asymmetrical. Symmetrical first groove 121 and second groove 141 facilitate molding and improve production efficiency. Asymmetrical first groove 121 and second groove 141 allow the photovoltaic panel 10 to better adapt to different installation conditions. For example, if the installation location of the photovoltaic panel 10 is narrow on one side, the installation direction of the photovoltaic panel 10 can be adjusted so that the shallower or narrower first groove 121 or second groove 141 is located on the restricted side, thereby facilitating installation and improving installation flexibility and adaptability. For a junction box 30 of the same photovoltaic element 100, the junction box 30 can be located at any point in the first groove 121 and the second groove 141. Different junction boxes 30 can be set in one or more of the first groove 121 and the second groove 141, so that the position of the junction box 30 can be flexibly arranged according to the different distribution of the battery layer 18.

[0067] Please see Figure 3 In some embodiments, the second sub-part 125 is provided with a first opening 1251, which is configured to allow the junction box 30 to pass through.

[0068] Specifically, the first groove 121 is provided with a first opening 1251, which is used for the junction box 30 to pass through. There may be one or more first openings 1251, which is not limited in this application. The cross-sectional shape of the first opening 1251 may be square, circular, or elliptical, etc., which is not limited in this application. In one embodiment, the number of first openings 1251 corresponds to the number of junction boxes 30. In another embodiment, the number of first openings 1251 may not correspond to the number of junction boxes 30. At least a portion of the junction box 30 may be a partial structure of the junction box 30, or it may be a cable for connecting the battery layer 18. In some embodiments, the second segment 145 is provided with a second opening 1451, which is configured for the junction box 30 to pass through. Specifically, the second segment 145 is provided with a second opening 1451, which is used for the junction box 30 to pass through. There may be one or more second openings 1451, which is not limited in this application. The cross-sectional shape of the second opening 1451 can be square, circular, or elliptical, etc., and is not limited in this application. In one embodiment, the number of second openings 1451 corresponds to the number of junction boxes 30. In another embodiment, the number of second openings 1451 may not correspond to the number of junction boxes 30. At least a part of the junction box 30 can be a partial structure of the junction box 30, or it can be a cable used by the junction box 30 to connect the battery layer 18. It should be noted that two adjacent photovoltaic elements 100 can share one junction box 30. In this embodiment, the first openings 1251 and second openings 1451 of two adjacent photovoltaic elements 100 can be aligned, and the junction box 30 is located in the first opening 1251 and the second opening 1451. The junction box 30 can connect the battery layers 18 of the two photovoltaic elements 100 respectively through cables, reducing the complex wiring between multiple junction boxes 30, reducing the risk of wiring errors, improving installation efficiency, and making the structure of the photovoltaic element 100 more compact. It also avoids the junction box 30 occupying extra space, making the overall size of the photovoltaic element 100 more reasonable.

[0069] Please see Figure 5 In some embodiments, the junction box 30 includes a first part 31 and a second part 32, the first part 31 being disposed in a first groove 121 and the second part 32 being disposed in a second groove 141.

[0070] Specifically, the junction box 30 includes an integrated junction box 30 and a split junction box 30. In one embodiment, the junction box 30 is a split junction box 30. The split junction box 30 is composed of multiple split junction boxes, which can be two-part, three-part, or other forms. The junction box 30 in this embodiment is a two-part junction box 30. The junction box 30 includes two split junction boxes 30, namely a first split 31 and a second split 32. Each split junction box 30 contains a diode, and the positive and negative cables are distributed on different split junction boxes 30. The connection between the split junction boxes 30 and the photovoltaic panel 10 is achieved through internal busbars. Each split junction box 30 (first split 31 and / or second split 32) is connected to different areas of the same photovoltaic panel 10, thereby distributing the current, reducing resistance, and improving the output efficiency of the photovoltaic panel 10. In the connection with other photovoltaic panels 10, the positive terminal junction box 30 and the negative terminal junction box 30 (first split 31 and second split 32) of the split junction box 30 are respectively installed in the first groove 121 and the second groove 141 of the photovoltaic panel 10, and are connected in series or parallel with other photovoltaic panels 10 through electrical connection components (e.g., cables). The first split 31 and the second split 32 are smaller in size than the integrated junction box, making the connection area of ​​the first split 31 and the second split 32 on the photovoltaic panel 10 much smaller, increasing the illumination area of ​​the photovoltaic panel 10 and improving the photovoltaic conversion efficiency. The first split 31 and the second split 32 are connected to different areas of the photovoltaic panel 10 (i.e., the first groove 121 and the second groove 141), shortening the mutual distance between the circuit of the photovoltaic panel 10 and the circuit connection of the first split 31 and the second split 32 during installation. This not only disperses the current, reduces the amount of cable used, and reduces cable loss, but also reduces the power generation loss caused by cable length, reduces resistance, and improves the output efficiency of the photovoltaic panel 10. Finally, the first split unit 31 and the second split unit 32 generate less heat than the integrated junction box 30, which can improve the heat dissipation effect of the photovoltaic component 100.

[0071] Please see Figure 2 or Figure 3 The photovoltaic module 100 provided in this application includes at least two photovoltaic elements 10 according to any one of the embodiments. The photovoltaic module 100 also includes a cover plate 70. In the width direction Y, in two adjacent photovoltaic panels 10, the cover plate 70 is configured such that at least a portion is accommodated in the second groove 141 of one photovoltaic element 10, and at least another portion is accommodated in the first groove 121 of another photovoltaic element 10. The two adjacent photovoltaic panels 10 are connected by the cover plate 70.

[0072] Specifically, multiple photovoltaic elements 100 can be interconnected to form a photovoltaic module 1000. In the photovoltaic module 1000, at least two photovoltaic elements 100 are connected sequentially in the width direction Y by a cover plate 70. In two adjacent photovoltaic panels 10 along the width direction Y, the second groove 141 of one photovoltaic element 10 abuts against the first groove 121 of the other photovoltaic element 10. The cover plate 70 is in contact with both the second groove 141 of one photovoltaic element 10 and the first groove 121 of the other photovoltaic element 10. A portion of the cover plate is accommodated in the second groove 141 of one photovoltaic element 10, and another portion is accommodated in the first groove 121 of the other photovoltaic element 10. Thus, the relative movement of two adjacent photovoltaic panels 10 along the width direction Y is limited. The adjacent photovoltaic panels 10 are locked together by the cover plate, which can prevent the photovoltaic panels 10 from shifting or loosening in the width direction Y, enhance the structural stability of the photovoltaic module 1000, and eliminate the need for additional bolts or welding and other complex operations. The installer only needs to align the cover plate 70 with the first groove 121 and the second groove 141 and insert it to complete the connection, which can improve the installation efficiency of the photovoltaic module 1000.

[0073] Please see Figure 2 or Figure 3 In some embodiments, the projection of the junction box 30 is located within the projection of the cover plate 70 in the projection plane perpendicular to the height direction Z.

[0074] Specifically, the cover 70 can shield the junction box 30 from sunlight and rain, preventing the junction box 30 from overheating due to sunlight exposure or short circuits caused by rain, thereby improving the lifespan of the junction box 30.

[0075] Please see Figure 2 or Figure 3 In some embodiments, the cover plate 70 includes a body plate 71, a first sub-protrusion 72 and a second sub-protrusion 73. The first sub-protrusion 72 and the second sub-protrusion 73 are spaced apart on the body plate 71. In two adjacent photovoltaic panels 10, the first sub-protrusion 72 is configured to be received in the second groove 141 of one photovoltaic element 10 and form a gap fit, and the second sub-protrusion 73 is configured to be received in the first groove 121 of another photovoltaic element 10 and form a gap fit.

[0076] Specifically, the first sub-protrusion 72 and the second sub-protrusion 73 being spaced apart on the body plate 71 means that the first sub-protrusion 72 and the second sub-protrusion 73 are separated from each other along the extension direction (i.e., the width direction Y) of the body plate 71 and maintain a fixed distance, so that the first sub-protrusion 72 can be aligned and inserted into the second groove 141 of a photovoltaic element 10, and the second sub-protrusion 73 can be aligned and inserted into the first groove 121 of an adjacent photovoltaic element 10; the gap fit means that the size of the first sub-protrusion 72 and the second sub-protrusion 73 is slightly smaller than the corresponding first groove 121 and... The width dimension of the second groove 141 ensures that after the first sub-protrusion 72 and the second sub-protrusion 73 are inserted into the first groove 121 and the second groove 141, a small gap remains between them and the sidewalls of the first groove 121 and the second groove 141. This gap allows the first sub-protrusion 72 and the second sub-protrusion 73 to maintain non-rigid contact with the first groove 121 and the second groove 141 even when the photovoltaic element 10 undergoes slight deformation due to thermal expansion and contraction or external forces. This prevents structural damage to the first groove 121 and the second groove 141 due to rigid contact. Simultaneously, it is understood that in the projection plane perpendicular to the height direction Z, the projections of the first groove 121 and the second groove 141 lie within the projection of the body plate 71. Thus, through the friction between the contact surfaces of the first sub-protrusion 72 and the second sub-protrusion 73 and the first groove 121 and the second groove 141, and the coverage of the body plate 71 on adjacent photovoltaic elements 10, the relative displacement of the photovoltaic elements 10 in the width direction Y can be limited, achieving the alignment and mechanical locking of adjacent photovoltaic elements 10. At the same time, the gap fit can also absorb errors that may occur during the installation process to a certain extent, making the installation process more convenient and efficient.

[0077] Please see Figure 4 or Figure 5 In some embodiments, the photovoltaic panel 10 further includes a third connecting portion (not shown), which is provided at least on both sides of the body portion 11 in the longitudinal direction X. In the longitudinal direction X, two adjacent photovoltaic elements 100 are connected by the third connecting portion.

[0078] Specifically, when multiple photovoltaic modules 100 are installed, the photovoltaic modules 100 are arranged sequentially along the length direction X and / or the width direction Y to cover the roof. Two adjacent photovoltaic modules 100 along the length direction X are connected by a third connecting part. The third connecting part can be a structure such as a buckle or screw, which can prevent the photovoltaic modules 100 from shifting or loosening in the length direction X, avoid misalignment of the photovoltaic modules 1000 due to long-term use or external factors, and improve the stability of the photovoltaic modules 1000. There can be one or more third connecting parts, which is not limited in this application. For example, a photovoltaic panel 10 of this application includes two third connecting parts. The third connecting part is at least provided in the body part 11. For example, the third connecting part can be provided in the body part 11 and the first groove 121. The third connecting part connects the two opposite sides of the body part 11 in the length direction X. Thus, the overall size of the third connecting part is relatively long. When two adjacent photovoltaic modules 100 are connected by the third connecting part, the third connecting part of the two adjacent photovoltaic modules 100 has a large connection area, which can improve the installation stability of the photovoltaic modules 100 in the length direction X.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A photovoltaic device, characterized in that, include: A photovoltaic panel includes a first connecting portion, a body portion, and a second connecting portion. In the width direction, the first connecting portion and the second connecting portion are respectively located on opposite sides of the body portion. The first connecting portion has a first groove, and the second connecting portion has a second groove. A junction box, electrically connected to the photovoltaic panel, is disposed in the first groove and / or the second groove.

2. The photovoltaic device according to claim 1, characterized in that, The photovoltaic panel includes a light-facing side and a back-facing side facing away from each other. The light-facing side is provided with a battery layer, and the openings of the first groove and the second groove are closer to the light-facing side.

3. The photovoltaic device according to claim 2, characterized in that, In the height direction, the size of the battery layer is not greater than the size of the first groove and / or the second groove, and the width direction is perpendicular to the height direction; and / or, In the width direction, the size of the body portion is not less than the size of the first groove and / or the second groove.

4. The photovoltaic device according to claim 1, characterized in that, The first groove includes a first sub-part, a second sub-part, and a third sub-part. The first sub-part extends from the body portion along the width direction. The second and third sub-parts are connected to opposite ends of the first sub-part in the width direction and extend in the height direction. The second sub-part is closer to the body portion than the third sub-part; and / or, The second groove includes a first sub-segment, a second sub-segment, and a third sub-segment. The first sub-segment extends from the body portion along the width direction. The second sub-segment and the third sub-segment are connected to the opposite ends of the first sub-segment in the width direction and extend in the height direction. The second sub-segment is closer to the body portion than the third sub-segment.

5. The photovoltaic device according to claim 4, characterized in that, The second sub-section is provided with a first opening, which is configured to allow the junction box to pass through; and / or, The second segment is provided with a second opening, which is configured to allow the junction box to pass through.

6. The photovoltaic device according to claim 1, characterized in that, The junction box includes a first part and a second part, the first part being disposed in the first groove and the second part being disposed in the second groove.

7. A photovoltaic module, characterized in that, The photovoltaic module includes at least two photovoltaic elements as described in any one of claims 1-6, and further includes a cover plate. In the width direction, in two adjacent photovoltaic panels, the cover plate is configured such that at least a portion is received in a second groove of one photovoltaic element and at least another portion is received in a first groove of another photovoltaic element, and the two adjacent photovoltaic panels are connected by the cover plate.

8. The photovoltaic module according to claim 7, characterized in that, In a projection plane perpendicular to the height direction, the projection of the junction box is located within the projection of the cover plate, and the width direction is perpendicular to the height direction.

9. The photovoltaic module according to claim 7, characterized in that, The cover plate includes a body plate, a first sub-protrusion, and a second sub-protrusion. The first sub-protrusion and the second sub-protrusion are spaced apart on the body plate. In two adjacent photovoltaic panels, the first sub-protrusion is configured to be received in the second groove of one photovoltaic element and form a gap fit, and the second sub-protrusion is configured to be received in the first groove of the other photovoltaic element and form a gap fit.

10. A photovoltaic system, characterized in that, include: Support components; and The photovoltaic module according to any one of claims 7-9, wherein the photovoltaic module is mounted on the support component.

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