Photovoltaic connectors

Abstract

The present invention relates to the field of photovoltaic technology, and in particular to a photovoltaic connector. The photovoltaic connector 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 sheath assembly is plugged into the negative connector or the positive connector. The positive pin and the negative pin are plugged into each other to form a plug-in section, and a first creepage distance is formed on the inner wall where the sheath assembly and the positive connector cooperate with each other, and a second creepage distance is formed on the outer wall where the sheath assembly and the negative connector cooperate with each other. The positive connector and the negative connector are made of materials with low heat deformation resistance requirements, and the sheath assembly is made of materials with high heat deformation resistance and high CTI, which meet the creepage distance requirements of high voltage and the requirements of high current for heat deformation resistance of components.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic technology, and more particularly to a photovoltaic connector. Background Technology

[0002] Typically, the connecting body of photovoltaic connectors 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 high-voltage (e.g., 1500V) photovoltaic array systems. Furthermore, the heat distortion temperature and CTI of these materials are also relatively low, limiting the increase in the rated current of photovoltaic connectors. In addition, PPE materials are susceptible to chemical corrosion and cracking, while PA materials are too hygroscopic, which can easily lead to short circuits and other safety accidents in the photovoltaic array.

[0003] Therefore, there is an urgent need to design a photovoltaic connector that enables photovoltaic connectors made of Class III materials to meet the requirements of high voltage and high current, while solving the material property problems of Class I materials. Summary of the Invention

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

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] This invention provides a photovoltaic connector, comprising:

[0007] A positive connector, comprising a positive terminal and a positive pin, wherein the positive pin is inserted into the positive terminal;

[0008] A negative connector, comprising a negative terminal and a negative pin, wherein the negative pin is inserted into the negative terminal;

[0009] A sheath assembly is inserted into the negative terminal or the positive terminal, and the sheath assembly is located around the negative terminal pin or the positive terminal pin. The sheath assembly has a receiving space for the positive terminal pin and the negative terminal pin to be inserted.

[0010] The positive terminal pin and the negative terminal pin are connected to form a mating segment, which is located within the accommodating space. Within the mating segment:

[0011] A first creepage distance is formed on the inner wall of the sheath assembly that mates with the positive terminal, and a second creepage distance is formed on the outer wall of the sheath assembly that mates with the negative terminal.

[0012] As an optional technical solution for photovoltaic connectors, the sheath assembly includes a first end, a first stepped portion, and a second end, wherein the first end is connected to the second end through the first stepped portion;

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

[0014] As an optional technical solution for photovoltaic connectors, the outer periphery of the negative electrode pin is provided with a buckle, which is configured to limit the first end.

[0015] As an optional technical solution for photovoltaic connectors, in the mating section, the outer periphery of the positive terminal is provided with multiple annular grooves, which are configured to increase the length of the first creepage distance.

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

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

[0018] As an optional technical solution for photovoltaic connectors, the negative connector further includes a negative sealing element and a negative cable. The negative cable is connected to the negative pin. The negative sealing element includes a sealing part and an extension part that are connected to each other. The sealing part seals the periphery of the negative cable, and a gap is provided between the extension part and the negative cable.

[0019] As an optional technical solution for photovoltaic connectors, the negative connector further includes a negative nut, which has an internal thread and an external thread on the negative connector. Part of the sealing part is located outside the negative connector. The negative nut is screwed onto the negative connector by the external thread and the internal thread being adapted to each other. The negative nut squeezes part of the sealing part to deform the sealing part.

[0020] As an optional technical solution for photovoltaic connectors, the negative electrode nut is provided with a locking tooth, and the negative electrode connector is provided with a limiting buckle. When the negative electrode nut is screwed in a first direction, the limiting buckle undergoes elastic deformation and does not interfere with the locking tooth; when the negative electrode nut is screwed in a second direction, the locking tooth interferes with the limiting buckle, so that the limiting buckle can restrict the movement of the locking tooth; the first direction and the second direction are opposite.

[0021] As an optional technical solution for photovoltaic connectors, the negative electrode nut includes an interconnected polygonal portion and a smooth curved portion. The polygonal portion is configured to fit a screwing fixture, and the smooth curved portion is configured to reduce the frictional force of manual screwing.

[0022] As an optional technical solution for photovoltaic connectors, the positive connector further includes a positive electrode seal, a positive electrode cable, and a positive electrode nut. The positive electrode cable is connected to the positive electrode pin, the positive electrode seal is sealed around the periphery of the positive electrode cable, and the positive electrode nut is threadedly connected to the positive electrode connector. The positive electrode seal has the same structure as the negative electrode seal, the positive electrode cable has the same structure as the negative electrode cable, and the positive electrode nut has the same structure as the negative electrode nut.

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

[0024] This invention provides a photovoltaic connector, which includes a positive connector, a negative connector, and a sheath assembly. The positive connector includes a positive terminal and a positive pin, with the positive pin inserted into the positive terminal. The negative connector includes a negative terminal and a negative pin, with the negative pin inserted into the negative terminal.

[0025] The sheath assembly is inserted into the negative or positive terminal connector and is located around the negative or positive terminal pin. The sheath assembly has accommodating space for the positive and negative terminal pins to be inserted.

[0026] The positive and negative pins are connected to form a mating section, which is located within the accommodating space. In the mating section, a first creepage distance is formed on the inner wall where the sheath assembly and the positive connector mate, and a second creepage distance is formed on the outer wall where the sheath assembly and the negative connector mate.

[0027] As described above, the sheath assembly in this invention can be disposed within either the positive or negative connector, thereby improving the versatility of the photovoltaic connector and saving costs. The sheath assembly is located at the mating section. By configuring the sheath assembly, the negative pin is not directly assembled with the negative connector. A first creepage distance is formed on the inner wall where the sheath assembly and the positive connector mate, and a second creepage distance is formed on the outer wall where they mate. Compared to existing photovoltaic connectors using Class III materials (which can only meet the voltage requirements of 1000V photovoltaic arrays), the photovoltaic connector in this invention, due to the sheath assembly, increases the creepage distance at the mating section, thereby improving the insulation strength of the photovoltaic connector and meeting the creepage distance requirements for high voltage (1500V), thus improving the versatility of the photovoltaic connector. In other words, the positive and negative terminals in this invention are still made of Class III materials as used in existing technologies, while the sheath assembly is made of Class I materials. This allows the photovoltaic connector to not only meet the voltage requirements of a 1000V photovoltaic array but also the high voltage requirement of 1500V, solving the limitation in material selection for the positive and negative terminals. It also avoids the problems of poor corrosion resistance, easy cracking, and low safety performance caused by using Class I materials for the positive and negative terminals in traditional technologies, thus extending the service life of the photovoltaic connector.

[0028] In this invention, both the positive and negative terminals are made of Class III materials with lower heat deformation resistance requirements, while the sheath assembly is made of Class I materials with higher heat deformation resistance and / or higher CTI, in order to meet the creepage distance requirements of high voltage and the heat deformation resistance requirements of high current components, thereby improving the flexibility of material application for the photovoltaic connector and achieving the goal of cost saving. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of the photovoltaic connector provided in an embodiment of the present invention;

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

[0032] Figure 3 This is an exploded view of the negative connector provided in an embodiment of the present invention;

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

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

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

[0036] Figure 7 for Figure 6 A magnified view of a section at point A in the middle;

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

[0038] Figure 9 This is a partial cross-sectional view of the negative electrode seal, negative electrode cable, and negative electrode nut after assembly, as provided in the embodiments of the present invention.

[0039] Figure 10 This is a schematic diagram of the negative electrode nut provided in an embodiment of the present invention from a first-view perspective;

[0040] Figure 11 This is a schematic diagram of the negative electrode nut provided in an embodiment of the present invention from a second perspective;

[0041] Figure 12 This is a schematic diagram of the negative electrode connector provided in an embodiment of the present invention;

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

[0043] Figure Labels

[0044] 10. First creepage distance; 20. Second creepage distance; 30. Third creepage distance; 40. Fourth creepage distance;

[0045] 100. Positive connector; 110. Positive terminal; 1101. Annular groove; 1102. Groove; 120. Positive pin; 130. Sealing ring; 140. Positive seal; 150. Positive cable; 160. Positive nut;

[0046] 200, Negative connector; 210, Negative terminal; 2101, Limiting buckle; 220, Negative pin; 230, Sheath assembly; 2301, Accommodating space; 2302, First end; 2303, First step portion; 2304, Second end; 240, Overlock; 250, Negative seal; 2501, Sealing portion; 2502, Elongated portion; 2503, Gap; 260, Negative cable; 270, Negative nut; 2701, Anti-reverse thread; 2702, Polygonal portion; 2703, Smooth curved portion. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0048] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0049] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0050] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0051] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0052] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0053] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

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

[0055] like Figures 1-7 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 terminal 110 and a positive pin 120, with the positive pin 120 inserted into the positive terminal 110. The negative connector 200 includes a negative terminal 210 and a negative pin 220, with the negative pin 220 inserted into the negative terminal 210.

[0056] The sheath assembly 230 is inserted into the negative terminal 210 or the positive terminal 110, and the sheath assembly 230 is located around the negative terminal pin 220 or the positive terminal pin 120. The sheath assembly 230 has a receiving space 2301 for the positive terminal pin 120 and the negative terminal pin 220 to be inserted.

[0057] The positive terminal pin 120 and the negative terminal pin 220 are connected to form a mating section located within the accommodating space 2301. Within this mating section: a first creepage distance 10 is formed on the inner wall where the sheath assembly 230 mates with the positive terminal connector 110; a second creepage distance 20 is formed on the outer wall where the sheath assembly 230 mates with the negative terminal connector 210. Both the positive terminal connector 110 and the negative terminal connector 210 include PC components, and the sheath assembly 230 includes PPE or PA components. The first creepage distance 10 and the second creepage distance 20 are... Figure 6 and Figure 7 The bolded part in the text.

[0058] Based on the above design, in this embodiment, the sheath assembly 230 can be disposed within the positive connector 100 or the negative connector 200, thereby improving the versatility of the photovoltaic connector and saving costs. Exemplarily, the following description uses the example of the sheath assembly 230 being disposed within the negative connector 200 for structural explanation.

[0059] The sheath assembly 230 is located at the mating section. The sheath assembly 230 prevents the negative pin 220 from directly assembling with the negative connector 210. A first creepage distance 10 is formed on the inner wall of the sheath assembly 230 where it mates with the positive connector 110, and a second creepage distance 20 is formed on the outer wall of the sheath assembly 230 where it mates with the negative connector 210. Compared to existing photovoltaic connectors using Class III materials (which can only meet the voltage requirements of 1000V photovoltaic arrays), the photovoltaic connector in this embodiment, due to the sheath assembly 230, increases the creepage distance at the mating section, thereby improving the insulation strength of the photovoltaic connector and meeting the creepage distance requirements for high voltage (1500V), thus improving the universality of the photovoltaic connector. In other words, in this embodiment, the positive terminal 110 and negative terminal 210 are still made of Class III materials as used in the prior art, while the sheath assembly 230 is made of Class I materials. This allows the photovoltaic connector to not only meet the voltage requirements of a 1000V photovoltaic array but also the high voltage requirement of 1500V, thus solving the limitation in material selection for the positive terminal 110 and negative terminal 210. It also avoids the problems of poor corrosion resistance, easy cracking, and low safety performance caused by using Class I materials for the positive terminal 110 and negative terminal 210 in traditional technologies, extending the service life of the photovoltaic connector.

[0060] In this embodiment, both the positive terminal 110 and the negative terminal 210 are made of Class III materials with low heat deformation resistance requirements, while the sheath assembly 230 is made of Class I materials with high heat deformation resistance requirements and / or high CTI, in order to meet the creepage distance requirements of high voltage (1500V) and the heat deformation resistance requirements of high current on the components, thereby improving the flexibility of the photovoltaic connector in terms of material application and achieving the goal of saving costs.

[0061] For example, 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), polyether ether ketone (PEEK), etc.

[0062] The sheath assembly 230 can be made of Class I materials, such as polyphenylene oxide (PPE), nylon (PA), thermoplastic polyester (PBT, PET), polyoxymethylene (POM), etc.

[0063] Optionally, in this embodiment, the first creepage distance 10 is greater than 15mm and the second creepage distance 20 is greater than 30mm, thereby meeting the 1500V voltage requirement. Of course, operators 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 elaborated here.

[0064] like Figure 3 and Figure 6 As shown, in this embodiment, the sheath assembly 230 includes a first end 2302, a first stepped portion 2303, and a second end 2304. The first end 2302 is connected to the second end 2304 via the first stepped portion 2303. The inner wall of the negative terminal 210 is provided with a second stepped portion (not shown in the figure), which is configured to limit the first stepped portion 2303. By providing the first stepped portion 2303 and the second stepped portion, the second stepped portion can limit the sheath assembly 230 during assembly, thereby improving the accuracy and efficiency of the sheath assembly 230 assembly and preventing 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, which improves processing efficiency and saves costs.

[0066] like Figure 6 As shown, in this embodiment, the outer periphery of the negative electrode pin 220 is provided with a buckle 240, which is configured to limit the first end 2302. The buckle 240 can limit the sheath assembly 230, preventing excessive displacement of the sheath assembly 230. At the same time, it simplifies the assembly steps, making it easier and more accurate to insert the negative electrode pin 220 into the negative electrode connector 210, thus improving assembly efficiency.

[0067] Optionally, the negative pin 220 can be integrally formed with the inverted pin 240, or it can be snapped together.

[0068] Optionally, the inverted buckle 240 in this embodiment can be set to stop the retraction.

[0069] like Figure 8 As shown, in this embodiment, in the insertion segment, a plurality of annular grooves 1101 are provided on the outer periphery of the positive terminal 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 makes the depth distance ( Figure 8 The bolded portion can be included in the first creepage distance 10, thereby increasing the length of the first creepage distance 10, thus meeting the creepage distance requirements of Class III materials at 1500V, and improving the universality of the photovoltaic connector.

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

[0072] Optionally, in this embodiment, multiple annular grooves 1101 can be provided, and the multiple annular grooves 1101 are equally spaced to achieve the longest possible first creepage distance 10 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 Figures 6-8 As shown, in this embodiment, a groove 1102 is provided on the outer periphery of the positive terminal connector 110. The positive terminal connector 100 also includes a sealing ring 130, which is disposed within the groove 1102 and is sealed to the negative terminal connector 210. The groove 1102 facilitates the installation of the sealing ring 130, improving the stability and reliability of its installation. Simultaneously, the sealing ring 130 enhances the stability of the connection between the positive terminal connector 110 and the negative terminal connector 210, reducing the likelihood of them becoming loose.

[0074] like Figure 2 , Figure 3 and Figure 9 As shown, in this embodiment, the negative connector 200 further includes a negative sealing member 250 and a negative cable 260. The negative cable 260 is connected to the negative pin 220. The negative sealing member 250 includes a sealing part 2501 and an extension part 2502 connected to each other. The sealing part 2501 seals the periphery of the negative cable 260, and a gap 2503 is provided between the extension part 2502 and the negative cable 260.

[0075] The sealing portion 2501 on the negative electrode seal 250 serves as a waterproof seal, reducing or preventing external moisture from entering the negative electrode connector 200 and improving safety. The elongated portion 2502 on the negative electrode seal 250 increases its length, and a gap 2503 is provided between the elongated portion 2502 and the negative electrode cable 260, thus creating a third creepage distance 30 and a fourth creepage distance 40 on opposite sides of the elongated portion 2502. Figure 9 The dotted line portion (as shown in the image) increases the creepage distance of the photovoltaic connector, enabling it to meet the creepage distance requirement for a high voltage of 1500V. It can be understood that the increased creepage distance is... Figure 9 The length of the dashed line portion in the diagram.

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

[0077] Understandably, operators can adjust the dimensions of the extension 2502 to meet the creepage distance requirements of different voltage levels for this part of the photovoltaic connector.

[0078] like Figures 9-13 As shown, in this embodiment, the negative connector 200 further includes a negative nut 270. The negative nut 270 has an internal thread, and the negative connector 210 has an external thread. A portion of the sealing part 2501 is located outside the negative connector 210. The negative nut 270 is screwed onto the negative connector 210 through the matching of the external and internal threads. The negative nut 270 compresses a portion of the sealing part 2501, causing the sealing part 2501 to deform, thereby allowing the sealing part 2501 to effectively seal and fill the negative connector 210. During the process of the negative nut 270 compressing the sealing part 2501, the elongated portion 2502 of the negative sealing member 250 engages with the gap 2503 of the negative cable 260, and the elongated portion 2502 does not deform. During the compression process, the elongated portion 2502 continuously advances towards the interior of the negative connector 210.

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

[0080] With the setting of the anti-reverse tooth 2701 and the limit buckle 2101, when the negative nut 270 is tightened clockwise, the limit buckle 2101 undergoes elastic deformation, and at this time the limit buckle 2101 does not interfere with the anti-reverse tooth 2701; when the negative nut 270 is turned counterclockwise, the anti-reverse tooth 2701 abuts against the limit buckle 2101 and interferes, so that the limit buckle 2101 generates an anti-reverse force on the anti-reverse tooth 2701, preventing the negative nut 270 from loosening and improving the connection stability.

[0081] Optionally, in this embodiment, multiple limit buckles 2101 are provided, and the multiple limit buckles 2101 are evenly arranged along the outer periphery of the negative terminal connector 210. This enables the limit buckles 2101 to generate a stable anti-retraction force on the anti-retraction tooth 2701, thereby avoiding local stress concentration in the negative terminal nut 270 and / or the negative terminal connector 210.

[0082] Furthermore, the negative electrode nut 270 in this embodiment includes an interconnected polygonal portion 2702 and a smooth curved portion 2703. The polygonal portion 2702 is configured to fit a screwing tool, and the smooth curved portion 2703 is configured to reduce the frictional force when manually screwing it in. The smooth curved portion 2703 reduces the frictional force when manually screwing the negative electrode nut 270, thereby preventing the negative electrode nut 270 from being easily unscrewed by hand. Simultaneously, it also avoids the problem of the photovoltaic connector being easily opened by hand due to the decrease in material properties caused by aging, resulting in reduced mechanical strength, thus improving the safety performance of the photovoltaic connector.

[0083] like Figure 4 and Figure 5 As shown, in this 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 seals the periphery 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 structure and function of the positive seal 140, the positive cable 150, and the positive nut 160 will not be described in detail here.

[0084] Optionally, in this embodiment, the negative terminal connector 210 and the sheath assembly 230 are injection molded using a two-color injection molding machine, thereby connecting the negative terminal connector 210 and the sheath assembly 230 into a whole, reducing the steps of assembling the sheath assembly 230 separately, and improving work efficiency.

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

[0086] Specifically, by adding heat shrink tubing at the riveting position of the negative cable 260, an additional insulating layer can be formed, thereby effectively increasing the creepage distance, reducing the risk of failure caused by arc discharge, enabling the photovoltaic connector to be used with high voltages 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, generally speaking, considering the compatibility of the photovoltaic connector with commonly used photovoltaic modules, it is preferable to add a sheath assembly 230 inside the negative connector 200. Of course, if the compatibility with commonly used photovoltaic modules is not considered, the operator can also add a sheath assembly 230 inside the positive connector 100. In this case, a third step (not shown in the figure) can be provided on the inner wall of the positive connector 110. The third step is configured to limit the second end 2304 of the sheath assembly 230, thereby improving the accuracy and efficiency of the assembly of the sheath assembly 230 and preventing excessive displacement of the sheath assembly 230.

[0089] Furthermore, the outer periphery of the positive electrode pin 120 may also be provided with a protruding inverted buckle 240, and the outer periphery of the negative electrode connector 210 may also be provided with an annular groove 1101. The specific structure of the photovoltaic connector with a sheath assembly 230 in the positive electrode connector 100 will not be described in detail in this embodiment.

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

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

[0092] Note that in the description of this specification, the references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

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) is plug-connected with the negative electrode plug pin (220) to form a plug-in section, and the plug-in section is located in the accommodating space (2301); In the interpolated 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; the provision of the sheath assembly (230) can increase the creepage distance at the plug-in section.

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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