Photovoltaic connector

Abstract

The invention relates to the field of photovoltaic technology, in particular to a photovoltaic connector. The photovoltaic connector comprises a positive electrode connector, a negative electrode connector and a sheath assembly. The positive electrode connector comprises a positive electrode joint and a positive electrode pin, and the positive electrode pin is inserted into the positive electrode joint. The cathode connector comprises a cathode joint and a cathode pin. The sheath assembly is inserted into the cathode joint or the anode joint. The positive electrode pin and the negative electrode pin are connected in an inserted mode to form a plug-in section, a first creepage distance is formed on the inner wall, matched with the positive electrode connector, of the sheath assembly, and a second creepage distance is formed on the outer wall, matched with the negative electrode connector, of the sheath assembly. The positive electrode connector and the negative electrode connector are made of materials with the low requirement for heat deformation resistance, the sheath assembly is made of materials with the high heat deformation resistance and the high CTI, and the requirement for the creepage distance of high voltage and the requirement for heat deformation resistance of components of large current are met.

Description

Technical Field

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

[0002] Usually, the connecting body of a photovoltaic connector is made of Class I engineering plastics such as PV40z (PPE) and A3XZG5 (PA), or Class III engineering plastics such as PC9330. However, due to the limitation of the Comparative Tracking Index (CTI) of Class III materials, photovoltaic connectors made of Class III materials cannot be used in photovoltaic array systems with high voltages (such as 1500V). At the same time, the heat deformation temperature and CTI of such materials are also low, which limits the increase in the rated current of photovoltaic connectors. In addition, PPE materials are not resistant to chemical corrosion and are prone to cracking, and PA materials are too hygroscopic, which can easily lead to safety accidents such as short circuits in photovoltaic arrays.

[0003] Therefore, it is urgent to design a photovoltaic connector so that the photovoltaic connector of Class III material can be suitable for the requirements of high voltage and large current, while solving the material property problems existing in Class I material. Summary of the invention

[0004] The purpose of the present invention is to provide a photovoltaic connector, in which both the positive and negative connectors are made of Class III materials, which can meet the creepage distance requirements of high voltage and the requirements of high current on the heat deformation resistance of components, thereby improving the flexibility and applicability of the photovoltaic connector.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] The present invention provides a photovoltaic connector, comprising:

[0007] A positive connector, the positive connector comprising a positive connector and a positive pin, the positive pin being plugged into the positive connector;

[0008] A negative electrode connector, the negative electrode connector comprising a negative electrode connector and a negative electrode pin, the negative electrode pin being inserted into the negative electrode connector;

[0009] A sheath assembly, the sheath assembly is inserted into the negative electrode connector or the positive electrode connector, and the sheath assembly is located around the negative electrode pin or the positive electrode pin, and the sheath assembly has an accommodating space for the positive electrode pin to be inserted into the negative electrode pin;

[0010] The positive electrode plug pin is plug-connected with the negative electrode plug pin to form an insertion section, and the insertion section is located in the accommodating space. In the insertion section:

[0011] A first creepage distance is formed on the inner wall where the sheath assembly and the positive electrode connector cooperate with each other, and a second creepage distance is formed on the outer wall where the sheath assembly and the negative electrode connector cooperate with each other.

[0012] As an optional technical solution of a photovoltaic connector, the sheath assembly includes a first end, a first step portion, and a second end portion, and the first end portion is connected to the second end portion through the first step portion;

[0013] The inner wall of the negative electrode connector is provided with a second step portion, and the second step portion is configured to limit the first step portion; or the inner wall of the positive electrode connector is provided with a third step portion, and the third step portion is configured to limit the second end portion.

[0014] As an optional technical solution of a photovoltaic connector, a buckle is convexly provided on the outer peripheral side of the negative electrode pin, and the buckle is configured to limit the first end.

[0015] As an optional technical solution of a photovoltaic connector, in the plug-in section, a plurality of annular grooves are provided on the outer circumference of the positive electrode connector, and the annular grooves are configured to increase the length of the first creepage distance.

[0016] As an optional technical solution for a photovoltaic connector, the interval between two adjacent annular grooves is not less than 1 mm.

[0017] As an optional technical solution for a photovoltaic connector, a groove is provided on the outer peripheral side of the positive electrode connector, and the positive electrode connector further includes a sealing ring, which is disposed in the groove and is sealed and connected to the negative electrode connector.

[0018] As an optional technical solution for a photovoltaic connector, the negative connector also includes a negative seal and a negative cable, the negative cable is connected to the negative pin, the negative seal includes a sealing portion and an extension portion that are connected to each other, the sealing portion is sealed on the circumferential side of the negative cable, and a gap is provided between the extension portion and the negative cable.

[0019] As an optional technical solution for a photovoltaic connector, the negative pole connector also includes a negative pole nut, an internal thread is arranged inside the negative pole nut, an external thread is arranged on the negative pole connector, part of the sealing portion is located outside the negative pole connector, the negative pole nut is screwed on the negative pole connector through the external thread and the internal thread that are adapted to each other, and the negative pole nut squeezes part of the sealing portion to cause the sealing portion to deform.

[0020] As an optional technical solution for a photovoltaic connector, a back-stop tooth is provided in the negative pole nut, and a limit buckle is provided on the negative pole connector. When the negative pole nut is rotated along a first direction, the limit buckle undergoes elastic deformation, and the limit buckle does not interfere with the back-stop tooth; when the negative pole nut is rotated along a second direction, the back-stop tooth interferes with the limit buckle, so that the limit buckle can limit the movement of the back-stop tooth; the first direction and the second direction are opposite.

[0021] As an optional technical solution for a photovoltaic connector, the negative electrode nut includes a polygonal portion and a smooth curved portion that are interconnected, the polygonal portion is configured to fit a screwing tool, and the smooth curved portion is configured to reduce friction during manual screwing.

[0022] As an optional technical solution for a photovoltaic connector, the positive connector also includes a positive seal, a positive cable and a positive nut, the positive cable is connected to the positive pin, the positive seal is sealed on the circumference of the positive cable, and the positive nut is threadedly connected to the positive connector; the positive seal has the same structure as the negative seal, the positive cable has the same structure as the negative cable, and the positive nut has the same structure as the negative nut.

[0023] The beneficial effects of the present invention include at least:

[0024] The present invention provides a photovoltaic connector, which includes a positive connector, a negative connector and a sheath assembly. The positive connector includes a positive connector and a positive pin, and the positive pin is plugged into the positive connector. The negative connector includes a negative connector and a negative pin, and the negative pin is plugged into the negative connector.

[0025] The sheath component is inserted into the negative electrode connector or the positive electrode connector, and the sheath component is located around the negative electrode pin or the positive electrode pin, and the sheath component has an accommodating space for the positive electrode pin and the negative electrode pin to be inserted.

[0026] The positive electrode pin and the negative electrode pin are plugged into each other to form an insertion section, which is located in the accommodating space. In the insertion section: a first creepage distance is formed on the inner wall where the sheath assembly and the positive electrode connector cooperate with each other, and a second creepage distance is formed on the outer wall where the sheath assembly and the negative electrode connector cooperate with each other.

[0027] As mentioned above, the sheath assembly in the present invention can be arranged in the positive connector or in the negative connector, thereby improving the universality of the photovoltaic connector and saving costs. The sheath assembly in the present invention is located at the plug-in section. Through the setting of the sheath assembly, the negative electrode pin is not directly assembled with the negative electrode connector. A first creepage distance is formed on the inner wall where the sheath assembly and the positive electrode connector cooperate with each other, and a second creepage distance is formed on the outer wall where the sheath assembly and the negative electrode connector cooperate with each other. Compared with the photovoltaic connector using Class III materials in the prior art (which can only meet the voltage requirements of 1000V photovoltaic arrays), the photovoltaic connector in the present invention can increase the creepage distance at the plug-in section due to the setting of the sheath assembly, thereby improving the insulation strength of the photovoltaic connector, and then meeting the creepage distance requirements of high voltage (1500V), and improving the universality of the photovoltaic connector. In other words, the positive and negative connectors in the present invention are still made of Class III materials in the prior art, and the sheath assembly is made of Class I materials, so that the photovoltaic connector can not only meet the voltage requirements of the 1000V photovoltaic array, but also meet the high voltage requirements of 1500V, solving the limitation problem of the selection of materials for the positive and negative connectors. At the same time, it also avoids the problems of corrosion resistance, easy cracking, low safety performance, etc. caused by the positive and negative connectors made of Class I materials in the traditional technology, and prolongs the service life of the photovoltaic connector.

[0028] The positive and negative connectors in the present invention both use Class III materials with lower requirements for heat resistance and deformation, and the sheath assembly uses Class I materials with higher heat resistance and deformation and / or higher CTI, so as to meet the creepage distance requirements of high voltage and the requirements of high current for heat resistance and deformation of components, thereby improving the flexibility of material applicability of the photovoltaic connector and achieving the purpose of cost saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0030] Figure 1 is a schematic structural diagram of a photovoltaic connector provided by an embodiment of the present invention;

[0031] Figure 2 is a schematic structural diagram of a negative electrode connector provided by an embodiment of the present invention;

[0032] Figure 3 is an exploded view of a negative electrode connector provided by an embodiment of the present invention;

[0033] Figure 4 is a schematic structural diagram of a positive electrode connector provided in an embodiment of the present invention;

[0034] Figure 5 is an exploded view of a positive electrode connector provided by an embodiment of the present invention;

[0035] Figure 6 is a cross-sectional view of a photovoltaic connector provided by an embodiment of the present invention;

[0036] Figure 7 for Figure 6 A partial enlarged view of the middle A;

[0037] Figure 8 A partial cross-sectional view of a positive electrode connector provided by an embodiment of the present invention;

[0038] Fig. 9 is a partial cross-sectional view of the negative electrode seal, the negative electrode cable and the negative electrode nut after being assembled according to an embodiment of the present invention;

[0039] Fig.10 is a schematic structural diagram of a negative electrode nut provided by an embodiment of the present invention at a first viewing angle;

[0040] Fig.11 is a schematic structural diagram of a negative electrode nut provided by an embodiment of the present invention at a second viewing angle;

[0041] Fig.12 is a schematic structural diagram of a negative electrode connector provided by an embodiment of the present invention;

[0042] Fig.13 It is a schematic diagram of the assembly relationship between the anti-recession tooth and the limiting buckle provided in an embodiment of the present invention.

[0043] Reference numerals

[0044] 10, first creepage distance; 20, second creepage distance; 30, third creepage distance; 40, fourth creepage distance;

[0045] 100, positive electrode connector; 110, positive electrode connector; 1101, annular groove; 1102, groove; 120, positive electrode pin; 130, sealing ring; 140, positive electrode seal; 150, positive electrode cable; 160, positive electrode nut;

[0046] 200, negative electrode connector; 210, negative electrode connector; 2101, limit buckle; 220, negative electrode pin; 230, sheath assembly; 2301, accommodating space; 2302, first end; 2303, first step portion; 2304, second end; 240, undercut; 250, negative electrode seal; 2501, sealing portion; 2502, extension portion; 2503, gap; 260, negative electrode cable; 270, negative electrode nut; 2701, anti-retraction tooth; 2702, polygonal portion; 2703, smooth curved portion. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions 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. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0048] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0050] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0051] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0053] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0054] This embodiment provides a photovoltaic connector, in which both the positive and negative connectors are made of Class III materials, which can meet the creepage distance requirements of high voltages and improve the flexibility and applicability of the photovoltaic connector.

[0055] like Figure 1-Figure 7 As shown, the photovoltaic connector mainly includes a positive connector 100, a negative connector 200 and a sheath assembly 230. The positive connector 100 includes a positive connector 110 and a positive pin 120, and the positive pin 120 is plugged into the positive connector 110. The negative connector 200 includes a negative connector 210 and a negative pin 220, and the negative pin 220 is plugged into the negative connector 210.

[0056] The sheath component 230 is inserted into the negative electrode connector 210 or the positive electrode connector 110 , and is located around the negative electrode pin 220 or the positive electrode pin 120 . The sheath component 230 has an accommodating space 2301 for the positive electrode pin 120 and the negative electrode pin 220 to be inserted.

[0057] The positive electrode pin 120 is plugged into the negative electrode pin 220 to form a plug-in section, which is located in the accommodating space 2301. In the plug-in section: the inner wall of the sheath assembly 230 and the positive electrode connector 110 cooperates with each other to form a first creepage distance 10, and the outer wall of the sheath assembly 230 and the negative electrode connector 210 cooperates with each other to form a second creepage distance 20. Both the positive electrode connector 110 and the negative electrode connector 210 include PC parts, and the sheath assembly 230 includes PPE parts or PA parts. The first creepage distance 10 and the second creepage distance 20 are Figure 6 and Figure 7 The bold line part.

[0058] Based on the above design, in this embodiment, the sheath assembly 230 can be arranged in the positive connector 100 or in the negative connector 200, thereby improving the universality of the photovoltaic connector and saving costs. For example, the structure is described below by taking the sheath assembly 230 arranged in the negative connector 200 as an example.

[0059] The sheath assembly 230 is located at the plug-in section. Through the setting of the sheath assembly 230, the negative electrode pin 220 is not directly assembled with the negative electrode connector 210. The inner wall of the sheath assembly 230 and the positive electrode connector 110 are matched with each other to form a first creepage distance 10, and the outer wall of the sheath assembly 230 and the negative electrode connector 210 are matched with each other to form a second creepage distance 20. Compared with the photovoltaic connector using Class III materials in the prior art (which can only meet the voltage requirements of 1000V photovoltaic arrays), the photovoltaic connector in this embodiment can increase the creepage distance at the plug-in section due to the setting of the sheath assembly 230, thereby improving the insulation strength of the photovoltaic connector, thereby meeting the creepage distance requirements of high voltage (1500V), and improving the universality of the photovoltaic connector. In other words, the positive electrode connector 110 and the negative electrode connector 210 in this embodiment are still made of Class III materials in the prior art, and the sheath assembly 230 is made of Class I materials, so that the photovoltaic connector can not only meet the voltage requirements of the 1000V photovoltaic array, but also meet the high voltage requirements of 1500V, solving the limitation problem of material selection of the positive electrode connector 110 and the negative electrode connector 210. At the same time, it also avoids the problems of corrosion resistance, easy cracking, low safety performance, etc. caused by the positive electrode connector 110 and the negative electrode connector 210 made of Class I materials in the traditional technology, thereby extending the service life of the photovoltaic connector.

[0060] The positive electrode connector 110 and the negative electrode connector 210 in this embodiment both use Class III materials with lower requirements for heat resistance and deformation, and the sheath assembly 230 uses Class I materials with higher requirements for heat resistance and deformation and / or higher CTI, so as to meet the creepage distance requirements of high voltage (1500V) and the requirements of high current for heat resistance and deformation of components, thereby improving the flexibility of material applicability of the photovoltaic connector and achieving the purpose of cost saving.

[0061] Illustratively, the positive electrode connector 110 and the negative electrode connector 210 in this embodiment are both made of Class III materials, such as polycarbonate (PC9330), polysulfone (PSU), polyphenylene sulfide (PPS), polyimide (PI), polyetheretherketone (PEEK), etc.

[0062] The sheath component 230 can be made of Class I materials, for example, polyphenylene ether (PPE), nylon (PA), thermoplastic polyester (PBT, PET), polyoxymethylene (POM), etc.

[0063] Optionally, in this embodiment, the first creepage distance 10 is greater than 15 mm and the second creepage distance 20 is greater than 30 mm, thereby meeting the voltage requirement of 1500 V. Of course, the operator can also set the first creepage distance 10 and the second creepage distance 20 to other values ​​according to actual needs, which will not be repeated here.

[0064] like Figure 3 and Figure 6 As shown, in this embodiment, the sheath assembly 230 includes a first end 2302, a first step portion 2303 and a second end 2304, the first end 2302 is connected to the second end 2304 through the first step portion 2303, and the inner wall of the negative electrode connector 210 is provided with a second step portion (not shown in the figure), and the second step portion is configured to limit the first step portion 2303. Through the provision of the first step portion 2303 and the second step portion, when the sheath assembly 230 is assembled, the second step portion can limit the sheath assembly 230, thereby improving the assembly accuracy and work efficiency of the sheath assembly 230 and avoiding excessive displacement of the sheath assembly 230.

[0065] Optionally, in this embodiment, the first end portion 2302, the first step portion 2303 and the second end portion 2304 are integrally formed to improve processing efficiency and save costs.

[0066] like Figure 6 As shown, in this embodiment, the outer peripheral side of the negative electrode pin 220 is convexly provided with an undercut 240, and the undercut 240 is configured to limit the first end 2302. The undercut 240 can limit the sheath assembly 230 to prevent excessive displacement of the sheath assembly 230. At the same time, the assembly steps are simplified, so that the negative electrode pin 220 can be inserted into the negative electrode connector 210 more easily and accurately, thereby improving the assembly efficiency.

[0067] Optionally, the negative electrode pin 220 may be integrally formed with the undercut 240 , or may be connected by snapping.

[0068] Optionally, the undercut 240 in this embodiment can be configured as a backlash prevention ring.

[0069] like Figure 8 As shown, in this embodiment, in the plug-in section, a plurality of annular grooves 1101 are provided on the outer circumference of the positive electrode connector 110 , and the annular grooves 1101 are configured to increase the length of the first creepage distance 10 .

[0070] Specifically, since the annular groove 1101 has a certain depth, this part of the depth distance ( Figure 8 The bold line portion in the figure can be included in the first creepage distance 10, thereby increasing the length of the first creepage distance 10, thereby meeting the creepage distance requirement of Class III materials at a voltage of 1500V and improving the universality of the photovoltaic connector.

[0071] Optionally, the width and depth of the annular groove 1101 in this embodiment are not less than 1 mm.

[0072] Optionally, the annular groove 1101 in this embodiment can be provided in plurality, and the plurality of annular grooves 1101 are arranged at equal intervals, so as to obtain a longer first creepage distance 10 as much as possible under the condition that the length of the positive terminal 110 is limited. For example, the interval between two adjacent annular grooves 1101 is not less than 1 mm.

[0073] like Figure 6-Figure 8 As shown, in this embodiment, a groove 1102 is provided on the outer peripheral side of the positive electrode connector 110, and the positive electrode connector 100 further includes a sealing ring 130, which is disposed in the groove 1102, and the sealing ring 130 is sealed and connected with the negative electrode connector 210. The provision of the groove 1102 is conducive to the installation of the sealing ring 130, and improves the stability and reliability of the installation of the sealing ring 130. At the same time, the provision of the sealing ring 130 is conducive to improving the stability of the plug-in connection between the positive electrode connector 110 and the negative electrode connector 210, and reduces the phenomenon of the two being loosened.

[0074] like Figure 2 , Figure 3 and Fig. 9 As shown, in this embodiment, the negative connector 200 also includes a negative seal 250 and a negative cable 260, the negative cable 260 is connected to the negative pin 220, the negative seal 250 includes a sealing portion 2501 and an extension portion 2502 that are connected to each other, the sealing portion 2501 is sealed on the circumferential side of the negative cable 260, and a gap 2503 is provided between the extension portion 2502 and the negative cable 260.

[0075] The sealing portion 2501 on the negative electrode seal 250 can play a waterproof sealing role, reduce or prevent external water vapor from entering the negative electrode connector 200, and improve safety. The extension portion 2502 on the negative electrode seal 250 can increase the length of the negative electrode seal 250, and a gap 2503 is provided between the extension portion 2502 and the negative electrode cable 260, so that the third creepage distance 30 and the fourth creepage distance 40 ( Fig. 9 ), thereby increasing the creepage distance of the photovoltaic connector, so that the photovoltaic connector can meet the creepage distance requirement of the 1500V high voltage. It can be understood that the increased creepage distance is Fig. 9 The length of the dotted part in .

[0076] Optionally, the width of the gap 2503 in this embodiment is not less than 1 mm.

[0077] It is understandable that the operator can adjust the size of the extension portion 2502 to meet the creepage distance requirements of the photovoltaic connector at different voltage levels.

[0078] like Figure 9-13 As shown, in this embodiment, the negative electrode connector 200 further includes a negative electrode nut 270, an internal thread is provided in the negative electrode nut 270, an external thread is provided on the negative electrode connector 210, a portion of the sealing portion 2501 is located outside the negative electrode connector 210, and the negative electrode nut 270 is screwed on the negative electrode connector 210 through the external thread and the internal thread matching, and the negative electrode nut 270 squeezes a portion of the sealing portion 2501 to deform the sealing portion 2501, so that the sealing portion 2501 can be well sealed and filled in the negative electrode connector 210. In the process of the negative electrode nut 270 squeezing the sealing portion 2501, the extension portion 2502 of the negative electrode seal 250 cooperates with the gap 2503 of the negative electrode cable 260, and the extension portion 2502 does not deform. In the process of squeezing, the extension portion 2502 is continuously pushed toward the inside of the negative electrode connector 210.

[0079] Furthermore, in the present embodiment, a back-stopping tooth 2701 is provided in the negative electrode nut 270, and a limiting buckle 2101 is provided on the negative electrode connector 210. When the negative electrode nut 270 is screwed in a first direction, the limiting buckle 2101 undergoes elastic deformation, and the limiting buckle 2101 does not interfere with the back-stopping tooth 2701; when the negative electrode nut 270 is screwed in a second direction, the back-stopping tooth 2701 interferes with the limiting buckle 2101, so that the limiting buckle 2101 can limit the movement of the back-stopping tooth 2701. The first direction is opposite to the second direction. For example, the first direction is defined as a clockwise direction, and the second direction is defined as a counterclockwise direction.

[0080] Through the setting of the anti-retraction tooth 2701 and the limiting buckle 2101, when the negative nut 270 is tightened clockwise, the limiting buckle 2101 undergoes elastic deformation, and at this time, the limiting buckle 2101 does not interfere with the anti-retraction tooth 2701; when the negative nut 270 is screwed counterclockwise, the anti-retraction tooth 2701 abuts against and interferes with the limiting buckle 2101, so that the limiting buckle 2101 produces a preventing force on the anti-retraction tooth 2701, thereby preventing the negative nut 270 from loosening and improving the connection stability.

[0081] Optionally, the limit buckle 2101 in this embodiment is set to be multiple, and the multiple limit buckles 2101 are evenly arranged along the outer peripheral side of the negative electrode connector 210, so that the limit buckle 2101 can generate a stable retaining force on the retaining tooth 2701, thereby avoiding local stress concentration on the negative electrode nut 270 and / or the negative electrode connector 210.

[0082] Furthermore, the negative electrode nut 270 in this embodiment includes a polygonal portion 2702 and a smooth curved portion 2703 connected to each other, the polygonal portion 2702 is configured to fit a screwing tool, and the smooth curved portion 2703 is configured to reduce the friction of manual screwing. The provision of the smooth curved portion 2703 can reduce the friction when the negative electrode nut 270 is screwed back manually, thereby preventing the negative electrode nut 270 from being easily unscrewed manually; at the same time, it can also avoid the problem that the photovoltaic connector is easily opened by manual hands due to the reduction in mechanical structural strength caused by the reduction in material properties after aging of the photovoltaic connector, thereby improving the safety performance of the photovoltaic connector.

[0083] like Figure 4 and Figure 5 As shown, in the present embodiment, the positive connector 100 further includes a positive seal 140, a positive cable 150 and a positive nut 160, the positive cable 150 is connected to the positive pin 120, the positive seal 140 is sealed on the peripheral side of the positive cable 150, and the positive nut 160 is threadedly connected to the positive connector 110; the positive seal 140 has the same structure as the negative seal 250, the positive cable 150 has the same structure as the negative cable 260, and the positive nut 160 has the same structure as the negative nut 270, therefore, the structures and functions of the positive seal 140, the positive cable 150 and the positive nut 160 are not described one by one here.

[0084] Optionally, the negative electrode connector 210 and the sheath assembly 230 in this embodiment are injection molded by a two-color machine, and then the negative electrode connector 210 and the sheath assembly 230 are connected into a whole, reducing the steps of assembling the sheath assembly 230 separately and improving work efficiency.

[0085] Optionally, in some embodiments, a heat shrink tube can be added to the riveted position of the negative cable 260. By wrapping the heat shrink tube around the riveted position, the creepage distance of the photovoltaic connector can be effectively increased, thereby further meeting the creepage distance requirements of the photovoltaic connector for high voltage.

[0086] Specifically, by adding a heat shrink tube at the riveted position of the negative cable 260, an additional insulation layer can be formed, thereby effectively increasing the creepage distance and reducing the risk of failure due to arc discharge, making the photovoltaic connector suitable for a high voltage of 1500V, improving the universality of the photovoltaic connector, and saving costs.

[0087] It should be noted that the creepage distances mentioned above include but are not limited to the first creepage distance 10, the second creepage distance 20, the third creepage distance 30 and the fourth creepage distance 40 in this embodiment.

[0088] It should be noted that, usually, considering the compatibility of the photovoltaic connector with common photovoltaic component products on the market, it is preferred to add a sheath assembly 230 inside the negative connector 200; of course, if the compatibility with common photovoltaic component products on the market is not considered, the operator can also add a sheath assembly 230 inside the positive connector 100. At this time, a third step portion (not shown in the figure) can be provided on the inner wall of the positive connector 110, and the third step portion is configured to limit the second end 2304 of the sheath assembly 230, thereby improving the assembly accuracy and work efficiency of the sheath assembly 230 and avoiding excessive displacement of the sheath assembly 230.

[0089] In addition, the outer circumference of the positive electrode pin 120 may also be provided with an undercut 240, and the outer circumference of the negative electrode connector 210 may also be provided with an annular groove 1101. The specific structure of the photovoltaic connector with the sheath assembly 230 provided in the positive electrode connector 100 is not described in detail in this embodiment.

[0090] In addition, the negative connector 200 with the sheath assembly 230 in this embodiment can be interplugged with a conventional positive connector; the positive connector 100 with the sheath assembly 230 can be interplugged with a conventional negative connector. It should be noted that the conventional positive connector and the conventional negative connector here are both existing connectors that can meet 1500V.

[0091] Obviously, the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

[0092] Note that in the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. Photovoltaic connector, characterized in that: include: A positive electrode connector (100), the positive electrode connector (100) comprising a positive electrode connector (110) and a positive electrode plug pin (120), the positive electrode plug pin (120) being plugged into the positive electrode connector (110); A negative electrode connector (200), the negative electrode connector (200) comprising a negative electrode connector (210) and a negative electrode plug pin (220), the negative electrode plug pin (220) being plugged into the negative electrode connector (210); A sheath component (230), the sheath component (230) being plugged into the negative electrode connector (210) or the positive electrode connector (110), and the sheath component (230) being located on the circumference of the negative electrode plug pin (220) or the positive electrode plug pin (120), and the sheath component (230) having an accommodating space (2301) for plugging the positive electrode plug pin (120) with the negative electrode plug pin (220); The positive electrode plug pin (120) and the negative electrode plug pin (220) are plug-connected to form an interlocking section, and the interlocking section is located in the accommodating space (2301). In the interlocking section: A first creepage distance (10) is formed on the inner wall of the sheath assembly (230) and the positive electrode connector (110) that cooperate with each other, and a second creepage distance (20) is formed on the outer wall of the sheath assembly (230) and the negative electrode connector (210) that cooperate with each other.

2. The photovoltaic connector according to claim 1, characterized in that: The sheath assembly (230) comprises a first end portion (2302), a first step portion (2303), and a second end portion (2304), wherein the first end portion (2302) is connected to the second end portion (2304) via the first step portion (2303); The inner wall of the negative electrode connector (210) is provided with a second step portion, and the second step portion is configured to limit the first step portion (2303); or, the inner wall of the positive electrode connector (110) is provided with a third step portion, and the third step portion is configured to limit the second end portion (2304).

3. The photovoltaic connector according to claim 2, characterized in that: An undercut (240) is convexly provided on the outer peripheral side of the negative electrode plug pin (220) or the positive electrode plug pin (120), and the undercut (240) is configured to limit the first end portion (2302).

4. The photovoltaic connector according to claim 1, characterized in that: In the plug-in section, a plurality of annular grooves (1101) are provided on the outer peripheral side of the positive electrode connector (110) or the negative electrode connector (210), and the annular grooves (1101) are configured to increase the length of the first creepage distance (10).

5. The photovoltaic connector according to claim 4, characterized in that: The interval between two adjacent annular grooves (1101) is not less than 1 mm.

6. The photovoltaic connector according to claim 1, characterized in that: A groove (1102) is provided on the outer peripheral side of the positive electrode connector (110). The positive electrode connector (100) further comprises a sealing ring (130). The sealing ring (130) is arranged in the groove (1102). The sealing ring (130) is sealed and connected to the negative electrode connector (210).

7. The photovoltaic connector according to claim 1, characterized in that: The negative electrode connector (200) further comprises a negative electrode seal (250) and a negative electrode cable (260), wherein the negative electrode cable (260) is connected to the negative electrode pin (220), and the negative electrode seal (250) comprises a sealing portion (2501) and an extension portion (2502) which are connected to each other, wherein the sealing portion (2501) is sealed on the circumference of the negative electrode cable (260), and a gap (2503) is provided between the extension portion (2502) and the negative electrode cable (260).

8. The photovoltaic connector according to claim 7, characterized in that: The negative electrode connector (200) further comprises a negative electrode nut (270), wherein an internal thread is arranged inside the negative electrode nut (270), and an external thread is arranged on the negative electrode connector (210), and a part of the sealing portion (2501) is located outside the negative electrode connector (210), and the negative electrode nut (270) is screwed onto the negative electrode connector (210) by matching the external thread with the internal thread, and the negative electrode nut (270) presses a part of the sealing portion (2501) so that the sealing portion (2501) is deformed.

9. The photovoltaic connector according to claim 8, characterized in that: A back-moving tooth (2701) is arranged inside the negative electrode nut (270), and a limiting buckle (2101) is arranged on the negative electrode connector (210); when the negative electrode nut (270) is rotated in a first direction, the limiting buckle (2101) undergoes elastic deformation, and the limiting buckle (2101) does not interfere with the back-moving tooth (2701); when the negative electrode nut (270) is rotated in a second direction, the back-moving tooth (2701) interferes with the limiting buckle (2101), so that the limiting buckle (2101) can limit the movement of the back-moving tooth (2701); the first direction and the second direction are opposite.

10. The photovoltaic connector according to claim 8, characterized in that: The negative electrode nut (270) comprises a polygonal portion (2702) and a smooth curved portion (2703) which are connected to each other. The polygonal portion (2702) is configured to fit a screwing tool, and the smooth curved portion (2703) is configured to reduce friction during manual screwing.

11. The photovoltaic connector according to claim 8, characterized in that: The positive connector (100) further comprises a positive seal (140), a positive cable (150) and a positive nut (160); the positive cable (150) is connected to the positive pin (120); the positive seal (140) is sealed on the circumference of the positive cable (150); and the positive nut (160) is threadedly connected to the positive connector (110); the positive seal (140) and the negative seal (250) have the same structure; the positive cable (150) and the negative cable (260) have the same structure; and the positive nut (160) and the negative nut (270) have the same structure.

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