Photovoltaic system

Abstract

The invention relates to the technical field of photovoltaic equipment, and discloses a photovoltaic system, which comprises a photovoltaic module, the photovoltaic module comprises a laminated piece, a frame and a conductive piece, the frame comprises a first supporting part and a second supporting part which are connected, the first supporting part is supported on the side surface of the laminated piece, the second supporting part is supported on the front surface or the back surface of the laminated piece, and the conductive piece is arranged on the side surface of the laminated piece; the first supporting part is provided with a first via hole, the conductive piece is arranged on the second supporting part, and the laminating piece is electrically connected with the conductive piece; the junction box connecting piece is arranged in the first through hole in a penetrating manner, and one end of the junction box connecting piece is connected with the conductive piece; and the junction box and the photovoltaic module are arranged at an interval, and the junction box is connected with the other end of the junction box connecting piece in a pluggable manner. According to the photovoltaic system, the photovoltaic module and the junction box are arranged in a split mode, the probability that the photovoltaic module is shielded by the junction box is low, arrangement is convenient, and attractiveness is high.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic equipment, and in particular to a photovoltaic system. Background Art

[0002] The photovoltaic modules in the related art are usually connected to a junction box, which is installed on the back of the photovoltaic module and blocks the surface of the photovoltaic module. When the photovoltaic module is installed on a building, the junction box makes the installation of the photovoltaic module inconvenient and affects the aesthetics. Summary of the invention

[0003] In view of this, the present invention provides a photovoltaic system to solve the problem that the surface of the photovoltaic module is blocked by the junction box.

[0004] The present invention provides a photovoltaic system, comprising: a photovoltaic component, wherein the photovoltaic component comprises a laminate, a frame and a conductive member, wherein the frame comprises a first supporting portion and a second supporting portion which are connected and arranged, wherein the first supporting portion is supported on a side surface of the laminate, and the second supporting portion is supported on a front side or a back side of the laminate, wherein the first supporting portion is provided with a first via hole, wherein the conductive member is arranged on the second supporting portion, and wherein the laminate is electrically connected to the conductive member; a junction box connector, wherein the junction box connector is passed through the first via hole, and wherein one end of the junction box connector is connected to the conductive member; and a junction box, wherein the junction box is spaced apart from the photovoltaic component, and wherein the junction box is detachably connected to the other end of the junction box connector.

[0005] Beneficial effects: Since the junction box does not need to be connected to the photovoltaic module as an integrated structure, the junction box will not block the photovoltaic module, which can improve the performance of the photovoltaic module and optimize the appearance of the photovoltaic module. The glass of the photovoltaic module does not need to be opened, which effectively reduces the self-explosion rate of the glass and improves the reliability of the photovoltaic module. The photovoltaic module and the junction box can be installed separately in the building, and the junction box can be hidden in the building components to achieve a perfect combination of the building and the photovoltaic module, improving the aesthetics and installation convenience.

[0006] In an optional embodiment, the second supporting portion is provided with a second via hole, and the conductive member is disposed in the second via hole.

[0007] Beneficial effect: By setting the second via hole, it is convenient to connect the junction box connector and the conductive member together, and it is convenient to install the conductive member on the frame.

[0008] In an optional embodiment, the photovoltaic assembly further includes: a bus bar connected to the laminate and located between the laminate and the first support portion; a lead wire, one end of which is connected to the bus bar and the other end is connected to the conductive member.

[0009] Beneficial effects: Not only can the laminated parts be connected to the conductive parts, but also the busbars can be covered when the photovoltaic components are installed on the building, which is beneficial to improving the overall aesthetics of the photovoltaic components.

[0010] In an optional embodiment, the lead wire exceeds the laminate by a dimension greater than or equal to 5 mm and less than or equal to 10 mm along its length direction; and / or the distance between the hole wall of the second via in the length direction of the first supporting portion and the lead wire is less than or equal to 25 mm; and / or the difference between the diameter of the first via and the diameter of the junction box connector is greater than or equal to 0.5 mm and less than or equal to 1 mm.

[0011] Beneficial effects: The lead-out wire is easily connected to the conductive member, and the connection reliability between the lead-out wire and the conductive member is high. While ensuring the sealing effect, the junction box connector is easy to pass through the first via hole.

[0012] In an optional embodiment, the conductive member has a first connection position and a second connection position, the first connection position is connected to the junction box connector, and the second connection position is connected to the junction box connector; in the length direction of the second supporting portion, the first connection position is closer to the hole wall of the second via hole than the second connection position.

[0013] Beneficial effect: The hole wall of the second through hole can assist in the connection and fixation between the junction box connector and the conductive member, so as to increase the connection stability between the junction box connector and the conductive member and extend the service life of the photovoltaic module.

[0014] In an optional embodiment, the photovoltaic system further includes: a first sealant, the first sealant is located between the conductive member and the hole wall of the first via hole; and / or a second sealant, the second sealant is located between the junction box connector and the hole wall of the second via hole.

[0015] Beneficial effects: Improve the sealing performance of photovoltaic modules and reduce the probability of damage to photovoltaic modules.

[0016] In an optional implementation, the photovoltaic system further includes: a cover plate, which is connected to the frame and is used to cover the second via hole.

[0017] Beneficial effects: On the one hand, it can shield the conductive parts, lead wires and junction box connectors, avoid short circuit, leakage, conductive structure wear and other problems in the photovoltaic system, reduce the probability of failure of the photovoltaic system, and improve the reliability of the photovoltaic system.

[0018] In an optional embodiment, there are at least two frames, and the first supporting portions of at least two frames are supported on different sides of the laminate; there are at least two conductive members, and there are at least two junction box connectors, and at least two conductive members are connected to at least two junction box connectors in a one-to-one correspondence; at least two conductive members are arranged on the same frame, and / or at least two conductive members are arranged on different frames.

[0019] Beneficial effects: The arrangement of the conductive parts and the junction box connectors can be adjusted according to changes in the installation environment, which is beneficial to improving the applicability of the photovoltaic system.

[0020] In an optional embodiment, when at least two of the conductive members are provided on the same frame, the first supporting portion of the frame is provided with at least two of the first via holes, and the center distance between adjacent first via holes is greater than or equal to 10 mm and less than or equal to 150 mm.

[0021] Beneficial effects: The installation of adjacent junction box connectors will not affect each other, thus improving installation efficiency, reducing the probability of damage and short circuit, and will not cause the size of the second via to be too large, which is beneficial to ensuring the structural strength of the frame.

[0022] In an optional embodiment, the junction box includes: a box body; an anti-reverse diode, which is arranged in the box body; a system connector, which is connected to the anti-reverse diode and extends out of the box body; a component connector, which is connected to the anti-reverse diode, the component connector includes a first connector, and the junction box connector includes a second connector, and the first connector and the second connector are pluggable and connected; wherein the first connector is located outside the box body and is spaced apart from the box body, or the first connector is installed on the outer surface of the box body.

[0023] Beneficial effects: The photovoltaic components, junction boxes, junction box connectors, and external electrical systems can form a complete conductive circuit, and the junction boxes can be arranged in many ways, which is conducive to increasing the applicable scenarios of the photovoltaic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 is a schematic structural diagram of a photovoltaic system according to an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of the structure of a photovoltaic module of a photovoltaic system according to an embodiment of the present invention;

[0027] Figure 3 for Figure 2 A partial enlarged view of the middle A area;

[0028] Figure 4 This is one of the structural schematic diagrams of the frame of the photovoltaic system according to an embodiment of the present invention;

[0029] Figure 5 This is a second structural schematic diagram of the frame of the photovoltaic system according to an embodiment of the present invention;

[0030] Figure 6 One of the cross-sectional views of the frame of the photovoltaic system according to the embodiment of the present invention;

[0031] Figure 7 The second cross-sectional view of the frame of the photovoltaic system according to the embodiment of the present invention;

[0032] Figure 8 Schematic diagram of the structure of a junction box of a photovoltaic system according to an embodiment of the present invention.

[0033] Description of reference numerals:

[0034] 1. Photovoltaic system;

[0035] 100, photovoltaic module; 110, laminate; 120, frame; 121, first support portion; 1211, first via hole; 122, second support portion; 1221, second via hole; 130, conductive member; 140, bus bar; 150, lead wire;

[0036] 200, junction box connector; 210, second connector;

[0037] 300, junction box; 310, box body; 320, anti-reverse diode; 330, system connector; 340, component connector; 341, first connector;

[0038] 400. Second sealing member. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0041] In the description of the present invention, "plurality" means two or more. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present invention, 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 a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In order to lower the operating temperature of the module, reduce possible local overheating, enhance the sealing effect, and facilitate integrated control, the photovoltaic module and the junction box in the related technology are separately set, and the frame of the photovoltaic module is provided with a connection slot, and the bus bar of the photovoltaic module extends from the connection slot to connect with the junction box, wherein a copper strip may be provided in the connection slot, and the bus bar is connected to the junction box through the copper strip to increase the heat dissipation effect. In this way, on the one hand, the copper strip and the junction box are inseparable, and after the copper strip and the junction box are connected, the relative distance between the photovoltaic module and the junction box is limited, which affects the convenience of the layout. On the other hand, the connection position of the copper strip and the junction box is located outside the photovoltaic module, which is easily separated by force, affecting the service life of the photovoltaic system.

[0044] Combine the following Figures 1 to 8 , describing an embodiment of the present invention.

[0045] According to an embodiment of the present invention, a photovoltaic system 1 is provided, which includes a photovoltaic module 100, a junction box connector 200, and a junction box 300. The photovoltaic system 1 can be applied to the field of building integrated photovoltaic (BIPV) technology, and the photovoltaic module 100 can be a crystalline silicon photovoltaic module 100 or a thin-film photovoltaic module 100.

[0046] The photovoltaic module 100 includes a laminate 110, a frame 120 and a conductive member 130. The frame 120 includes a first supporting portion 121 and a second supporting portion 122 which are connected and arranged. The first supporting portion 121 is supported on the side of the laminate 110, and the second supporting portion 122 is supported on the front or back of the laminate 110. The first supporting portion 121 is provided with a first through hole 1211. The conductive member 130 is provided on the second supporting portion 122. The laminate 110 is electrically connected to the conductive member 130. The junction box connector 200 is passed through the first through hole 1211, one end of the junction box connector 200 is connected to the conductive member 130, the junction box 300 is spaced apart from the photovoltaic module 100, and the junction box 300 is detachably connected to the other end of the junction box connector 200.

[0047] The laminate 110 includes a stacked high-transmittance front panel, a battery cell and a high-transmittance back panel. The panel material may be glass, polyethylene glycol terephthalate (PET), copper-molybdenum copper-copper material (Cu / Mo-Cu / Cu, CPC), polyvinylidene chloride (PVDC), etc.

[0048] The thickness and mechanical strength of the panel can be set according to the installation application scenario of the photovoltaic module 100. For example, when the photovoltaic module 100 is installed on a building curtain wall, the panel can choose tempered glass; when the photovoltaic module 100 is used in the cold north, the panel can choose to increase the glass thickness.

[0049] The cell may be at least one of a Passivated Emitter Rear Cell (PERC) cell, a Tunnel Oxide Passivated Contact (TOPCon) cell, a Heterojunction with Intrinsic Thin-film (HIT) cell, a Back Contact (BC) cell, and a thin-film photovoltaic cell. In addition, there may be a plurality of frames 120, and the plurality of frames 120 are arranged around the laminate 110 along the circumference of the laminate 110.

[0050] For example, the conductive member 130 may be a metal welding sheet, and the junction box connector 200 may include a cable, which is welded to the metal welding sheet to ensure the connection reliability and conductive performance between the conductive member 130 and the junction box connector 200. The frame 120 may be made of a metal material or an insulating plastic. When the frame 120 is a metal frame, the first via 1211 may be waterproof sealed multiple times, for example, two layers of waterproof insulating sealant are injected into the first via 1211 for sealing, and the thickness of the frame 120 when it is a metal frame may be about 2 to 3 times the thickness of the frame 120 when it is a plastic frame.

[0051] Since the junction box 300 does not need to be connected to the photovoltaic module 100 as an integrated structure and there is no junction box 300 and cables to block it, the appearance of the photovoltaic module 100 is smoother, and the glass of the photovoltaic module 100 does not need to be opened to electrically connect the laminate 110 and the junction box 300, which can effectively reduce the self-explosion rate of the glass and improve the reliability of the photovoltaic module 100.

[0052] When the junction box 300 is connected to the junction box connector 200 , electrical connection is achieved between the junction box 300 and the photovoltaic assembly 100 to ensure that the performance of the photovoltaic system 1 remains unchanged.

[0053] When the junction box 300 is separated from the junction box connector 200, the photovoltaic module 100 can be installed separately in the building, for example, the photovoltaic module 100 is installed on the curtain wall and the roof, and the photovoltaic module 100 can be used as a part of the building, adapted to the exterior structural design of the building, and achieve a perfect combination of the building and the photovoltaic module 100, thereby increasing the aesthetics. In addition, the junction box 300 can also be installed separately in the building, for example, the junction box 300 is installed separately in the building beam or frame (for example, in the roof or curtain wall beam frame), so that the junction box 300 can be hidden in the building component, improving the aesthetics of the building, and the arrangement of the junction box 300 is more flexible, and the photovoltaic system 1 is applicable to more diverse environments.

[0054] Among them, the size of the photovoltaic component 100 can be designed according to the actual application scenario requirements; the format of the photovoltaic component 100 can also be made into any format according to the requirements of the building structure; the power of the photovoltaic component 100 can also be changed so that the photovoltaic component 100 can be directly adapted to the building structure frame.

[0055] In addition, by arranging the conductive member 130 on the frame 120, on the one hand, the relative position between the conductive member 130 and the laminate 110 is stable, which is conducive to ensuring the reliability of the electrical connection between the conductive member 130 and the laminate 110; on the other hand, the junction box connector 200 only needs to extend into the frame 120 without being too deep into the photovoltaic module 100, which will not affect the performance of the photovoltaic module 100; and the cross-sectional area of ​​the conductive member 130 can be larger than the cross-sectional area of ​​the junction box connector 200, and the conductive member 130 can be made of metal material to improve the heat dissipation efficiency between the junction box connector 200 and the laminate 110, thereby ensuring the stable performance of the photovoltaic system 1.

[0056] In addition, the junction box connector 200 is passed through the first support portion 121, and the conductive member 130 is arranged on the second support portion 122. The conductive member 130 can be staggered with the first support portion 121 to prevent the first support portion 121 from blocking the conductive member 130. The connection between the junction box connector 200 and the conductive member 130 is convenient, and after the connection, the connection between the first support portion 121 and the conductive member 130 is hidden in the photovoltaic module 100, reducing the probability of separation of the first support portion 121 and the conductive member 130.

[0057] In some embodiments, when the conductive member 130 is installed on the frame 120, the junction box connector 200 is first passed through the first through hole 1211 and the conductive member 130, and then an insulating thermosetting adhesive is injected into the connection between the junction box connector 200 and the conductive member 130 to fix the junction box connector 200 and the conductive member 130, and then the frame 120 and the laminate 110 are installed. In this way, the junction box connector 200, the conductive member 130 and the frame 120 are constructed as an integrated structure before the photovoltaic module 100 is packaged or framed, which is conducive to reducing the operating cost of the photovoltaic module 100 packaging.

[0058] Among them, the length of the junction box connector 200 can be determined according to the installation position and distance of the actual installation scenario. The junction box connector 200 can also be equipped with connecting wires, connecting components and other structures of various lengths. This is conducive to installing the junction box 300 in the bracket or building component of the fixed component in a specific installation scenario.

[0059] In addition, since the junction box 300 is independent of the photovoltaic module 100, the junction box 300 and the photovoltaic module 100 can be produced separately without adding an installation production process of attaching the junction box 300 to the photovoltaic module 100, thereby reducing production costs and improving production efficiency.

[0060] like Figure 3 , Figure 5 and Figure 7 As shown, in the technical solution of this embodiment, the second supporting portion 122 is provided with a second via hole 1221 , and the conductive member 130 is disposed in the second via hole 1221 .

[0061] In this way, on the one hand, it is convenient to install the conductive member 130 to the frame 120, and the conductive member 130 can be positioned by interference fit, bonding, etc. On the other hand, during processing, the junction box connector 200 and the conductive member 130 can be connected together through the second via hole 1221. For example, the cable of the junction box connector 200 is welded to the metal welding sheet through the second via hole 1221, and the connection operation of the junction box connector 200 and the conductive member 130 is more convenient. After the junction box connector 200 and the conductive member 130 are connected, glue can be poured into the second via hole 1221 to seal the first via hole 1211 and the second via hole 1221, and the sealing operation is also more convenient.

[0062] For example, when the frame 120 is a metal frame 120 , the second via hole 1221 may be waterproofly sealed multiple times, for example, two layers of waterproof insulating sealant may be injected into the second via hole 1221 for sealing.

[0063] like Figure 1-Figure 3 As shown, in the technical solution of this embodiment, the photovoltaic module 100 further includes a bus bar 140 and a lead wire 150. The bus bar 140 is connected to the laminate 110, and the bus bar 140 is located between the laminate 110 and the first support portion 121. One end of the lead wire 150 is connected to the bus bar 140 and the other end is connected to the conductive member 130. Among them, the overlapping length of the lead wire 150 and the bus bar 140 can be the width of the bus bar 140. In addition, the lead wire 150 and the conductive member 130 can be connected through the second via 1221, and the connection between the lead wire 150 and the conductive member 130 is relatively convenient, and the production efficiency is high.

[0064] For example, the lead wire 150 has a flat portion, which is connected to the bus bar 140. The length of the flat portion can be equal to the width of the bus bar 140. The thickness of the lead wire 150 except the flat portion can be the same as the thickness of the bus bar 140. The ratio of the thickness of the flat portion to the thickness of the bus bar 140 is 1 / 2 to 3 / 4. In addition, an insulating isolation strip can be provided on the side of the flat portion facing away from the lead wire 150. The insulating isolation strip, the flat portion and the lead wire 150 are stacked, which is beneficial to improving the flatness of the photovoltaic module 100 after lamination. The isolation strip can isolate the positive lead wire and the negative lead wire of the laminate 110. The component material of the isolation strip may include insulating materials such as expandable polyethylene (EPE) and ethylene-vinyl acetate copolymer (EVA). After lamination, the isolation strip can form a long-lasting and effective bond with the packaging film of the laminate 110.

[0065] In this way, one end of the junction box connector 200, one end of the lead wire 150 and the conductive member 130 are concentrated in the second via hole 1221. After the second via hole 1221 is sealed, it is beneficial to seal the connection between the junction box connector 200, the lead wire 150 and the conductive member 130, thereby ensuring the reliability and electrical safety of the connection among the junction box connector 200, the lead wire 150 and the conductive member 130.

[0066] In addition, the lead-out wire 150 is located on the side of the laminate 110 supported by the first support portion 121, which is not only convenient for connection with the conductive member 130, but also can cover the bus bar 140 when the photovoltaic module 100 is installed on the building, which is beneficial to improving the overall appearance of the photovoltaic module 100. The bus bar 140 and the lead-out wire 150 are led out from the side of the laminate 110 without passing through the front and back of the photovoltaic module 100. The glass does not need to be punched, which reduces the probability of damage to the glass and facilitates the installation and integration of the photovoltaic module 100.

[0067] like Figure 3 As shown, in the technical solution of this embodiment, the lead wire 150 exceeds the laminate 110 by a dimension H1 greater than or equal to 5 mm and less than or equal to 10 mm along its length direction.

[0068] When H1 is less than 5 mm, the lead wire 150 is shorter, and the connection between the lead wire 150 and the conductive member 130 is inconvenient; when H1 is greater than 10 mm, the lead wire 150 is longer, and the lead wire 150 occupies a large space, which is not aesthetically pleasing, affects the performance of the photovoltaic module 100, and has a high production cost.

[0069] By setting H1 to be not less than 5 mm and not more than 10 mm, on the one hand, the connection between the lead wire 150 and the conductive member 130 is facilitated, and on the other hand, the lead wire 150 requires a small space for arrangement and will not block the laminate 110, thereby ensuring the power generation efficiency of the photovoltaic module 100, having a high aesthetic appearance, and reducing production costs.

[0070] like Figure 3 In the technical solution of this embodiment, the distance H2 between the hole wall of the second via hole 1221 and the lead wire 150 in the length direction of the first support portion 121 is less than or equal to 25 mm. In this way, on the one hand, the size of the second via hole 1221 is small, which is conducive to ensuring the structural strength of the frame 120. On the other hand, the lead wire 150 is close to the hole wall of the second via hole 1221, and the hole wall of the second via hole 1221 can help fix the connection position of the lead wire 150 and the conductive member 130, thereby improving the connection reliability of the lead wire 150 and the conductive member 130.

[0071] In the technical solution of this embodiment, the difference between the diameter of the first via hole 1211 and the diameter H3 of the junction box connector 200 is greater than or equal to 0.5 mm and less than or equal to 1 mm.

[0072] When H3 is less than 0.5 mm, the diameter of the first via hole 1211 is close to the diameter of the junction box connector 200, and it is not convenient to insert the junction box connector 200 into the first via hole 1211; when H3 is greater than 1 mm, the diameter of the first via hole 1211 is significantly different from the diameter of the junction box connector 200, which makes it difficult to seal the hole wall of the first via hole 1211 and the junction box connector 200, and the photovoltaic module 100 has poor sealing and waterproof performance.

[0073] By setting H3 to be not less than 0.5 mm and not more than 1 mm, on the one hand, it is easy to insert the junction box connector 200 into the first through hole 1211, and on the other hand, the gap between the hole wall of the first through hole 1211 and the junction box connector 200 will not be too large, which is convenient for sealing and waterproofing.

[0074] like Figure 3 In the technical solution of this embodiment, the conductive member 130 has a first connection position and a second connection position, the first connection position is connected to the junction box connector 200, and the second connection position is connected to the junction box connector 200. In the length direction of the second support portion 122, the first connection position is closer to the hole wall of the second via hole 1221 than the second connection position.

[0075] When the junction box connector 200 and the junction box 300 are plugged in and out, the junction box connector 200 will be subjected to tension. By setting the connection position between the junction box connector 200 and the conductive member 130 closer to the hole wall of the second through hole 1221, the hole wall of the second through hole 1221 can assist in the connection and fixation of the junction box connector 200 and the conductive member 130, so as to increase the connection stability between the junction box connector 200 and the conductive member 130, reduce the probability of separation of the junction box connector 200 and the conductive member 130, and extend the service life of the photovoltaic module 100.

[0076] like Figure 1-Figure 3 As shown, in the technical solution of this embodiment, the photovoltaic system 1 also includes a first sealing member, which is located between the conductive member 130 and the hole wall of the first via hole 1211. The first sealing member can be made of elastic materials such as rubber and silicone, or can also be sealant. In this way, water and dust can be prevented from entering between the conductive member 130 and the hole wall of the first via hole 1211, thereby improving the sealing performance of the photovoltaic module 100 and reducing the probability of damage to the photovoltaic module 100.

[0077] The photovoltaic system 1 further includes a second sealing member 400, which is located between the junction box connector 200 and the hole wall of the second via hole 1221. The second sealing member 400 can be made of elastic materials such as rubber and silicone, or can be made of sealant. In this way, water and dust can be prevented from entering between the junction box connector 200 and the hole wall of the second via hole 1221, thereby improving the sealing performance of the photovoltaic module 100 and reducing the probability of damage to the photovoltaic module 100.

[0078] For example, the first seal and the second seal 400 can be a one-time molded structure, which is sealed by injecting waterproof and insulating sealant between the conductive part 130 and the hole wall of the first via 1211 until the sealant overflows from the junction box connector 200 and the hole wall of the second via 1221. At this time, the first seal and the second seal 400 are formed into an integral structure.

[0079] In some embodiments not shown, the photovoltaic system 1 further includes a cover plate, which is connected to the frame 120 and is used to cover the second via hole 1221 , wherein the cover plate may be made of insulating plastic.

[0080] By setting the cover plate, on the one hand, the conductive member 130, the lead wire 150 and the junction box connector 200 can be shielded, thereby preventing the photovoltaic system 1 from short circuit, leakage, conductive structure wear and other problems, reducing the probability of failure of the photovoltaic system 1 and improving the reliability of the photovoltaic system 1; on the other hand, the second via 1221 can be shielded to improve the neatness of the photovoltaic system 1.

[0081] The cover plate and the frame 120 can be connected by means of clamping, bolting, riveting, bonding, etc. to fix the relative position between the cover plate and the frame 120. In addition, the outer surface of the cover plate and the outer surface of the frame 120 can be flush to increase the appearance and avoid the formation of steps to reduce dust and liquid accumulation.

[0082] like Figure 1-Figure 3 As shown, there are at least two frames 120, the first support portions 121 of at least two frames 120 are supported on different sides of the laminate 110, there are at least two conductive members 130, and there are at least two junction box connectors 200, and at least two conductive members 130 and at least two junction box connectors 200 are arranged in a one-to-one correspondence.

[0083] For example, there may be four frames 120, which are connected end to end in sequence, and each frame 120 abuts against one side of the laminate 110. The laminate 110 has a positive electrode and a negative electrode, and there are two conductive members 130, one conductive member 130 is connected to the positive electrode of the laminate 110, and the other conductive member 130 is connected to the negative electrode of the laminate 110.

[0084] In the technical solution of this embodiment, at least two conductive members 130 are arranged on the same frame 120, at least two junction box connectors 200 are located on the same side of the laminate 110, and the extension directions of at least two junction box connectors 200 are roughly the same, which facilitates the layout of the junction box connector 200 between the junction box 300 and the photovoltaic module 100 and improves space utilization.

[0085] In some embodiments not shown, at least two conductive members 130 are disposed on different frames 120, and at least two junction box connectors 200 are located on different sides of the laminate 110. The arrangement of the conductive members 130 and the junction box connectors 200 can be adjusted according to the actual installation scenario requirements of the photovoltaic system 1, and is determined by the layout of the cells of the laminate 110 and the arrangement of the electrical circuits.

[0086] In this way, the arrangement of the conductive member 130 and the junction box connector 200 can be adjusted as the structure of the installation environment changes, which is beneficial to improving the applicability of the photovoltaic system 1.

[0087] like Figure 4 As shown, in the technical solution of this embodiment, when at least two conductive members 130 are arranged on the same frame 120, the first support portion 121 of the frame 120 is provided with at least two first via holes 1211, and the center distance H4 of adjacent first via holes 1211 is greater than or equal to 10 mm and less than or equal to 150 mm.

[0088] If the center distance H4 of adjacent first vias 1211 is less than 10 mm, the distance between adjacent junction box connectors 200 is relatively close. On the one hand, the junction box connector 200 may affect the installation of the adjacent junction box connector 200, and on the other hand, the probability of adjacent junction box connectors 200 being damaged and short-circuited due to friction is increased; if the center distance H4 of adjacent first vias 1211 is greater than 150 mm, the size of the second via 1221 corresponding to the first via 1211 will increase, resulting in a decrease in the structural strength of the frame 120, which is not conducive to protecting the photovoltaic module 100.

[0089] By setting the center distance H4 of adjacent first vias 1211 to be no less than 10 mm and no more than 150 mm, the distance between adjacent junction box connectors 200 will not be too close, the installation of adjacent junction box connectors 200 will not affect each other, and the installation efficiency is improved. The probability of friction between adjacent junction box connectors 200 is low, which reduces the probability of damage and short circuit. The center distance between adjacent first vias 1211 will not be too large, and the size of the second via 1221 will not be too large, which is conducive to ensuring the structural strength of the frame 120 and high reliability of protection of the photovoltaic module 100.

[0090] like Figure 1 and Figure 8 As shown, the junction box 300 includes a box body 310 , an anti-reverse diode 320 , a system connector 330 and a component connector 340 .

[0091] The anti-reverse diode 320 is arranged in the box body 310, the system connector 330 is connected to the anti-reverse diode 320 and extends out of the box body 310, the system connector 330 is connected to the anti-reverse diode 320, the component connector 340 includes a first connector 341, and the junction box connector 200 includes a second connector 210, and the first connector 341 and the second connector 210 are pluggable.

[0092] The box body 310 can be closed, the system connector 330 can be connected to external electrical components, and the electrical energy generated by the photovoltaic module 100 directly supplies power to external electrical components through the junction box connector 200, the component connector 340, the anti-reverse diode 320 and the system connector 330; the system connector 330 can also be connected to an external energy storage device, and the energy storage device stores the electrical energy generated by the photovoltaic module 100. The anti-reverse diode 320 is used to prevent the circuit from backfeeding, and to prevent the photovoltaic module 100 from being damaged by reverse voltage and current and electrical energy.

[0093] For example, the junction box 300 also includes a metal pad, which is located inside the box body 310, and the anti-reverse diode 320 is installed on the metal pad. The system connector 330 and the component connector 340 are both welded to the metal pad, thereby achieving electrical connection among the anti-reverse diode 320, the system connector 330 and the component connector 340.

[0094] In addition, there may be two system connectors 330, one of which is positive and connected to the positive pole of the external electrical system, and the other of which is negative and connected to the negative pole of the external electrical system; there may be two component connectors 340, one of which is positive and connected to the positive pole of the photovoltaic component 100, and the other of which is negative and connected to the negative pole of the electrical system of the photovoltaic component 100. In this way, the photovoltaic component 100, the junction box 300, the junction box connector 200, and the external electrical system form a complete conductive loop.

[0095] Among them, in the technical solution of this embodiment, the first connector 341 is located outside the box body 310 and is spaced apart from the box body 310. For example, the component connector 340 may include a component connecting wire and a first connector 341. One end of the component connecting wire is located inside the box body 310 and is connected to the anti-reverse diode 320, and the other end of the component connecting wire is located outside the box body 310 and is connected to the first connector 341. In this way, the length of the junction box connector 200 can be shortened, the probability of damage to the junction box connector 200 can be reduced, and after the junction box connector 200 and the photovoltaic module 100 are connected, the photovoltaic module 100 is also easy to disassemble and assemble;

[0096] In some embodiments not shown, the first connector 341 is installed in the box body 310 and exposed from the box body 310. For example, the component connector 340 includes a component connection wire and a first connector 341. One end of the component connection wire is located in the box body 310 and connected to the anti-reverse diode 320. The other end of the component connection wire is also located in the box body 310 and connected to the first connector 341. The first connector 341 can be constructed as a socket structure embedded in the outer surface of the box body 310, or the component connector 340 includes the first connector 341. The first connector 341 is directly installed on the metal pad in the box body 310. The first connector 341 can be constructed as a socket structure embedded in the outer surface of the box body 310. In this way, the junction box 300 has no wires outside the box body 310, the junction box 300 is easy to arrange, and the probability of damage to the component connector 340 is reduced.

[0097] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A photovoltaic system, characterized in that: include: A photovoltaic module (100), the photovoltaic module (100) comprising a laminate (110), a frame (120) and a conductive member (130), the frame (120) comprising a first supporting portion (121) and a second supporting portion (122) which are connected to each other, the first supporting portion (121) being supported on a side surface of the laminate (110), the second supporting portion (122) being supported on a front surface or a back surface of the laminate (110), the first supporting portion (121) being provided with a first via hole (1211), the conductive member (130) being provided on the second supporting portion (122), and the laminate (110) being electrically connected to the conductive member (130); A junction box connector (200), the junction box connector (200) being inserted into the first through hole (1211), and one end of the junction box connector (200) being connected to the conductive member (130); A junction box (300), the junction box (300) and the photovoltaic assembly (100) are arranged at a distance, and the junction box (300) is detachably connected to the other end of the junction box connector (200).

2. The photovoltaic system according to claim 1, characterized in that: The second supporting portion (122) is provided with a second through hole (1221), and the conductive member (130) is arranged in the second through hole (1221).

3. The photovoltaic system according to claim 2, characterized in that: The photovoltaic module (100) further comprises: a bus bar (140), the bus bar (140) being connected to the laminate (110) and being located between the laminate (110) and the first supporting portion (121); A lead wire (150), one end of the lead wire (150) is connected to the bus bar (140) and the other end is connected to the conductive member (130).

4. The photovoltaic system according to claim 3, characterized in that: The lead wire (150) exceeds the laminate (110) by a length greater than or equal to 5 mm and less than or equal to 10 mm; and / or The distance between the hole wall of the second via hole (1221) in the length direction of the second supporting portion (122) and the lead wire (150) is less than or equal to 25 mm; and / or The difference between the diameter of the first through hole (1211) and the diameter of the junction box connector (200) is greater than or equal to 0.5 mm and less than or equal to 1 mm.

5. The photovoltaic system according to claim 3, characterized in that: The conductive member (130) has a first connection position and a second connection position, the first connection position is connected to the junction box connection member (200), and the second connection position is connected to the junction box connection member (200); In the length direction of the second supporting portion (122), the first connecting position is closer to the hole wall of the second via hole (1221) than the second connecting position.

6. The photovoltaic system according to claim 2, characterized in that: Also includes: a first sealing member, the first sealing member being located between the conductive member (130) and a hole wall of the first via hole (1211); and / or A second sealing member (400), wherein the second sealing member (400) is located between the junction box connector (200) and a hole wall of the second through hole (1221).

7. The photovoltaic system according to claim 2, characterized in that: Also includes: A cover plate, the cover plate is connected to the frame (120) and is used to cover the second via hole (1221).

8. The photovoltaic system according to claim 1, characterized in that: There are at least two frames (120), and the first support portions (121) of at least two frames (120) are supported on different sides of the laminate (110); There are at least two conductive members (130), there are at least two junction box connectors (200), and at least two conductive members (130) are connected to at least two junction box connectors (200) in a one-to-one correspondence; At least two of the conductive members (130) are arranged on the same frame (120), and / or at least two of the conductive members (130) are arranged on different frames (120).

9. The photovoltaic system according to claim 8, characterized in that: When at least two of the conductive members (130) are provided on the same frame (120), the first support portion (121) of the frame (120) is provided with at least two of the first via holes (1211), and the center distance between adjacent first via holes (1211) is greater than or equal to 10 mm and less than or equal to 150 mm.

10. The photovoltaic system according to claim 1, characterized in that: The junction box (300) comprises: Box body (310); an anti-reverse diode (320), the anti-reverse diode (320) being arranged in the box body (310); A system connector (330), the system connector (330) being connected to the anti-reverse diode (320) and extending out of the box body (310); A component connector (340), the component connector (340) being connected to the anti-reverse diode (320), the component connector (340) comprising a first plug connector (341), the junction box connector (200) comprising a second plug connector (210), the first plug connector (341) and the second plug connector (210) being pluggable and connected; Wherein, the first plug-in connector (341) is located outside the box body (310) and is spaced apart from the box body (310), or the first plug-in connector (341) is installed on the outer surface of the box body (310).

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