Photovoltaic connector

Abstract

The utility model belongs to photovoltaic power generation technical field, specifically discloses a photovoltaic connector. The utility model provides a photovoltaic connector in the prior art has the electrode joint and the nut of unified standard structure on the basis of matching sleeve, sleeve can be in satisfying cable wear setting while still can be connected with the electrode joint and the nut of unified standard structure, make the electrode joint of this structure's photovoltaic connector can be mutually matched and connected with the electrode joint of the photovoltaic connector of the small line diameter cable of prior art, and the photovoltaic connector of this structure can connect the cable of large line diameter, solved the photovoltaic connector in prior art because of the promotion of cable specification and cannot be adapted with conventional photovoltaic connector, need to replace the conventional photovoltaic connector into the photovoltaic connector suitable for large line diameter cable, not only lead to the increase of overall cost, still cannot solve the problem of mutual matching between different specifications photovoltaic connector, reduced development application cost.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic power generation technology, and in particular to a photovoltaic connector. Background Technology

[0002] Existing photovoltaic connectors are mainly compatible with cables with smaller wire diameters (e.g., 2.5mm). 2 ~6mm 2 With the development of the photovoltaic industry, the electrode joints and other structures of photovoltaic connectors have achieved a unified standard structure. However, with the continuous trend of cost reduction and efficiency improvement in photovoltaics, power plants need to further reduce power transmission losses to improve the overall power generation efficiency of photovoltaic systems. To solve the above technical problems, the use of large-diameter, high-current-carrying copper cables and aluminum alloy cables has become one of the future trends for cost reduction and efficiency improvement.

[0003] Photovoltaic connectors suitable for large-diameter cables are relatively rare. Currently, photovoltaic connectors suitable for large-diameter cables mainly meet usage requirements by increasing the internal space of the photovoltaic connector and increasing its total length. However, due to the increase in cable specifications, these photovoltaic connectors cannot be adapted to conventional photovoltaic connectors, requiring the replacement of conventional photovoltaic connectors with those suitable for large-diameter cables. This not only increases the overall cost but also fails to solve the interoperability problem between photovoltaic connectors of different specifications, thus increasing development and application costs to some extent. Utility Model Content

[0004] The purpose of this invention is to provide a photovoltaic connector that is suitable for connecting with large-diameter cables and can be interoperable with photovoltaic connectors suitable for small-diameter cables, thereby reducing development and application costs.

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

[0006] Photovoltaic connectors, including:

[0007] Electrode connectors;

[0008] Terminal assembly, disposed within the electrode connector;

[0009] A sleeve, the first end of which is sleeved on the outside of one end of the electrode connector, and the sleeve is threadedly connected to the electrode connector.

[0010] A nut, one end of which is fitted onto the outside of the second end of the sleeve, and the nut is threadedly connected to the sleeve. The nut, the sleeve, and the electrode connector form a through hole for the cable to pass through, so that the cable can be connected to the terminal assembly.

[0011] As an optional technical solution for the aforementioned photovoltaic connector, the inner wall of the first end of the sleeve is provided with a sealing groove and a first threaded section in sequence from the port inward. The inner diameter of the sealing groove is larger than the inner diameter of the first threaded section. A first sealing element is provided in the sealing groove. One end of the electrode connector passes through the first sealing element and is threadedly connected to the first threaded section.

[0012] As an optional technical solution for the aforementioned photovoltaic connector, the first sealing element includes a first sealing ring and a second sealing ring coaxially arranged. The inner diameter of the first sealing ring is larger than the inner diameter of the second sealing ring. The outer side wall of one end of the electrode connector is provided with a second threaded section and a limiting part in sequence along the axial direction from the end. The outer diameter of the limiting part is larger than the outer diameter of the second threaded section. A portion of the second threaded section is threaded to the first threaded section. The second sealing ring is sleeved on the outside of another portion of the second threaded section. The first sealing ring is sleeved on the outside of the limiting part, and the limiting part abuts against the end face of the second sealing ring. The outer side walls of the first sealing ring and the second sealing ring both abut against the groove wall of the sealing groove.

[0013] As an optional technical solution for the aforementioned photovoltaic connector, the nut is provided with a second sealing element, which includes a first sealing ring and a second sealing ring arranged coaxially. The outer diameter of the first sealing ring is larger than the outer diameter of the second sealing ring. The second sealing ring is inserted into the sleeve. The first sealing ring is disposed between the second end of the sleeve and the end sidewall of the nut. The first sealing ring and the second sealing ring are used for cable passage, and the inner sidewall of the first sealing ring is used to abut against the cable.

[0014] As an optional technical solution for the aforementioned photovoltaic connector, the first sealing ring has a conical structure, the second sealing ring has a cylindrical structure, the small end of the first sealing ring is connected to one end of the second sealing ring, the outer side wall of the large end of the first sealing ring abuts against the inner side wall of the nut, and the outer side wall of the second sealing ring abuts against the inner side wall of the sleeve.

[0015] As an optional technical solution for the aforementioned photovoltaic connector, the terminal assembly includes a terminal piece and a fixing piece. The terminal piece includes a riveting part, which is used to cover and press the wire core of the cable. The fixing piece is sleeved on the riveting part and extends to the position where the cable has a sheath. The fixing piece presses the riveting part, the wire core of the cable, and the sheath of the cable.

[0016] As an optional technical solution for the aforementioned photovoltaic connector, the expansion coefficient of the fixing component is the same as that of the wire core of the cable.

[0017] As an optional technical solution for the aforementioned photovoltaic connector, the riveting part is made of copper or copper alloy, the fixing part is made of aluminum or aluminum alloy, and the core of the cable is made of aluminum or aluminum alloy.

[0018] As an optional technical solution for the aforementioned photovoltaic connector, the riveting part is made of metallic copper or a copper alloy, the fixing part is made of metallic copper or a copper alloy, and the core of the cable is made of metallic copper or a copper alloy.

[0019] As an optional technical solution for the aforementioned photovoltaic connector, the riveting part is covered with a tin-plated layer.

[0020] The beneficial effects of this utility model are:

[0021] The photovoltaic connector provided by this utility model has a sleeve fitted onto the outside of one end of an electrode connector, with the electrode connector threaded to the sleeve. A nut is fitted onto the outside of the other end of the sleeve, with the other end of the sleeve threaded to the nut. The electrode connector, sleeve, and nut are detachable from each other. The electrode connector can be either a positive or negative terminal. In practical applications, the electrode connector of one photovoltaic connector needs to be connected to the electrode connector of another photovoltaic connector. The two photovoltaic connectors have opposite electrical polarities and require compatibility. This utility model achieves a matching sleeve based on the existing standard structure of electrode connectors and nuts. The sleeve can accommodate cable routing while also connecting to electrode connectors and nuts with a standardized structure, thus enabling the connector to... The electrode connector of this photovoltaic connector can be interoperated with the electrode connectors of existing photovoltaic connectors suitable for small-diameter cables. Furthermore, one end of the sleeve of this photovoltaic connector is fitted onto the outside of one end of the electrode connector, making the sleeve larger than the electrode connector. This increases the internal space of the sleeve, allowing it to accommodate large-diameter cables with sheaths. The smaller core size after removing the sheath allows for connection with existing electrode connectors without the need to develop new ones. This solves the problem of existing photovoltaic connectors being incompatible with conventional photovoltaic connectors due to increased cable specifications, requiring replacement with connectors suitable for large-diameter cables. This not only increases overall costs but also fails to resolve the interoperability issue between different photovoltaic connector specifications, thus reducing development and application costs. Attached Figure Description

[0022] Figure 1 This is an assembly drawing of the positive electrode type photovoltaic connector provided in this embodiment of the utility model;

[0023] Figure 2 This is an assembly drawing of the negative electrode type photovoltaic connector provided in this embodiment of the utility model;

[0024] Figure 3 This is an exploded view of the positive electrode type photovoltaic connector provided in this embodiment of the utility model;

[0025] Figure 4 This is an exploded view of the negative electrode type photovoltaic connector provided in this embodiment of the utility model;

[0026] Figure 5 This is a cross-sectional view of the photovoltaic connector provided in this embodiment of the utility model;

[0027] Figure 6 This is an isometric view of the sleeve provided in an embodiment of the present invention;

[0028] Figure 7 This is a cross-sectional view of the sleeve provided in this embodiment of the utility model;

[0029] Figure 8 yes Figure 5 Enlarged schematic diagram of the structure at point A;

[0030] Figure 9 This is a schematic diagram of the structure of the first sealing element provided in this embodiment of the utility model;

[0031] Figure 10 This is a schematic diagram of the structure of the second sealing element provided in this embodiment of the utility model;

[0032] Figure 11 yes Figure 5 Enlarged schematic diagram of the structure at point B;

[0033] Figure 12 This is a schematic diagram of the terminal assembly provided in an embodiment of the present utility model;

[0034] Figure 13 This is a partial cross-sectional view of the riveting part, the wire core of the cable, and the fastener riveting provided in this embodiment of the utility model;

[0035] Figure 14 This is a cross-sectional view of the riveting part, the wire core of the cable, and the fastener riveting provided in this embodiment of the utility model;

[0036] Figure 15 This is a cross-sectional view of the cable core and fastener riveting provided in this embodiment of the utility model;

[0037] Figure 16 This is a schematic diagram of the assembly of the riveting part and the wire core of the cable provided in this embodiment of the utility model;

[0038] Figure 17 This is a schematic diagram of the structure of the wire core of the riveting part of the riveting cable provided in this embodiment of the utility model;

[0039] Figure 18This is a schematic diagram of a fastener with an opening provided in an embodiment of the present utility model;

[0040] Figure 19 This is a schematic diagram of another structure of the fastener with an opening provided in this embodiment of the utility model.

[0041] In the picture:

[0042] 100. Cables;

[0043] 1. Electrode connector; 2. Terminal assembly; 3. Sleeve; 4. Nut; 5. First seal; 6. Second seal;

[0044] 11. Second screw section; 12. Limiting part;

[0045] 21. Terminal component; 211. Riveting part; 22. Fixing component; 221. Opening;

[0046] 31. Sealing groove; 32. First threaded section; 33. Fourth threaded section;

[0047] 41. Third threaded section;

[0048] 51. First sealing ring; 52. Second sealing ring;

[0049] 61. First sealing ring; 62. Second sealing ring. Detailed Implementation

[0050] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0051] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model 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] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0054] like Figures 1 to 4 As shown, this embodiment provides a photovoltaic connector, which includes an electrode connector 1, a terminal assembly 2, a sleeve 3, and a nut 4. The terminal assembly 2 is disposed within the electrode connector 1. The photovoltaic connector typically includes a positive photovoltaic connector and a negative photovoltaic connector. The electrode connector of the positive photovoltaic connector is connected to the electrode connector 1 of the negative photovoltaic connector. Specifically, the terminal assemblies 2 within the electrode connectors 1 of the two photovoltaic connectors are electrically connected.

[0055] like Figures 3 to 5 As shown, the first end of the sleeve 3 is fitted onto the outside of one end of the electrode connector 1, and the sleeve 3 is threadedly connected to the electrode connector 1. One end of the nut 4 is fitted onto the outside of the second end of the sleeve 3, and the nut 4 is threadedly connected to the sleeve 3. The nut 4, the sleeve 3, and the electrode connector 1 form a through hole for the cable 100 to pass through, so that the cable 100 can be connected to the terminal assembly 2.

[0056] One end of the sleeve 3 is fitted onto the outside of one end of the electrode connector 1, and the electrode connector 1 is threadedly connected to the sleeve 3. One end of the nut 4 is fitted onto the outside of the other end of the sleeve 3, and the other end of the sleeve 3 is threadedly connected to the nut 4. The electrode connector 1, sleeve 3, and nut 4 are detachable from each other. The electrode connector 1 is either a positive or negative connector. In practical applications, the electrode connector 1 of one photovoltaic connector needs to be connected to the electrode connector 1 of another photovoltaic connector. The electrode connectors 1 of the two photovoltaic connectors have opposite electrical polarities and need to be compatible. This embodiment achieves matching of the sleeve 3 with the electrode connector 1 and nut 4, which have a unified standard structure in the prior art. The sleeve 3 can meet the cable 100 insertion requirements while also connecting with the electrode connector 1 and nut 4, which have a unified standard structure, so that the... The electrode connector 1 of the photovoltaic connector structure can be interoperated with the electrode connectors of existing photovoltaic connectors suitable for small-diameter cables. Furthermore, one end of the sleeve 3 of the photovoltaic connector structure is fitted onto the outside of one end of the electrode connector 1. Therefore, the size of the sleeve 3 is larger than the size of the electrode connector 1, increasing the internal space of the sleeve 3 to accommodate large-diameter cables with sheaths. The smaller core size after removing the sheath allows for connection with existing electrode connectors 1 without the need to develop a new electrode connector 1. This solves the problem that existing photovoltaic connectors cannot be adapted to conventional photovoltaic connectors due to the increase in cable specifications, requiring the replacement of conventional photovoltaic connectors with those suitable for large-diameter cables. This not only increases the overall cost but also fails to solve the interoperability problem between photovoltaic connectors of different specifications, thus reducing development and application costs.

[0057] In the production of photovoltaic connectors, the end of the sleeve 3 connected to the electrode connector 1 is adapted to the corresponding electrode connector 1. For example, the inner diameter of the sleeve 3 is adapted to the outer diameter of the electrode connector 1, and the thread structure on the inner side of the sleeve 3 is adapted to the thread structure on the outer side of the electrode connector 1. The sleeve 3 can be designed and manufactured according to the specific structure of the electrode connector 1 and the nut 4 to be compatible with electrode connectors 1 and nuts 4 of different thread specifications and sizes. The electrode connectors 1 and nuts 4 can be electrode connectors 1 and nuts 4 with a unified standard structure in the prior art. In this embodiment, one end of the sleeve 3 of the photovoltaic connector is sleeved on the outside of one end of the electrode connector 1. Therefore, the size of the sleeve 3 is larger than the size of the electrode connector 1, and the internal space of the sleeve 3 is increased, which can accommodate large-diameter cables with wire sheaths. The core size of the cable after removing the wire sheath is small, so it can be connected to the electrode connector 1 in the prior art without the need to develop a new electrode connector 1. The nut 4 is sleeved on the outside of the other end of the sleeve 3. The size of the nut 4 is larger than the size of the sleeve 3, and the internal space of the nut 4 is increased, which can accommodate large-diameter cables with wire sheaths. In this embodiment, the photovoltaic connector, while suitable for large-diameter cables 100, eliminates the need to develop new electrode connectors and nut structures, reducing development costs. The diameter of the hole on the nut for cable passage only needs to match the outer diameter of the cable; no other structural changes to the nut in existing technologies are required. In practical applications, the electrode connector 1 of this photovoltaic connector can be interoperated with the electrode connectors of existing photovoltaic connectors suitable for small-diameter cables, eliminating the need to replace conventional photovoltaic connectors with those suitable for large-diameter cables 100, thus reducing overall usage costs. The photovoltaic connector provided in this embodiment is suitable for 2.5mm... 2 ~16mm 2 The cable 100 can meet the connection requirements of large diameter cables 100.

[0058] In some embodiments, such as Figures 5 to 8 As shown, the inner wall of the first end of the sleeve 3 is provided with a sealing groove 31 and a first threaded section 32 sequentially from the port inward. The inner diameter of the sealing groove 31 is larger than the inner diameter of the first threaded section 32. A first sealing element 5 is provided in the sealing groove 31. One end of the electrode connector 1 passes through the first sealing element 5 and is threadedly connected to the first threaded section 32. The first sealing element 5 achieves a sealed connection between the sleeve 3 and the electrode connector 1, and the sealing groove 31 provides space for fixing and accommodating the first sealing element 5.

[0059] Optionally, such as Figure 8 and Figure 9As shown, the first sealing element 5 includes a first sealing ring 51 and a second sealing ring 52 coaxially arranged. The inner diameter of the first sealing ring 51 is larger than the inner diameter of the second sealing ring 52. The outer wall of one end of the electrode connector 1 is provided with a second threaded section 11 and a limiting portion 12 sequentially along the axial direction from the end. The outer diameter of the limiting portion 12 is larger than the outer diameter of the second threaded section 11. A portion of the second threaded section 11 is threaded to the first threaded section 32. The second sealing ring 52 is sleeved on the outside of another portion of the second threaded section 11. Specifically, the second sealing ring 52 is sleeved on the portion of the second threaded section 11 near the limiting portion 12. The first sealing ring 51 is sleeved on the outside of the limiting portion 12, and the limiting portion 12 abuts against the end face of the second sealing ring 52, forming a first sealing point between the limiting portion 12 and the end face of the second sealing ring 52. The outer walls of both the first sealing ring 51 and the second sealing ring 52 abut against the groove wall of the sealing groove 31, forming a second sealing point. The second sealing ring 52 is fitted onto the outside of another part of the second screw section 11, forming a third sealing point.

[0060] During the connection process between the second threaded section 11 and the first threaded section 32 of the electrode connector 1, the limiting part 12 compresses the second sealing ring 52, forming the aforementioned first and second sealing points. Typically, the first sealing element 5 is made of an elastic material, such as rubber or silicone, to improve sealing performance. Therefore, when the electrode connector 1 is fitted with the first sealing element 5, the first sealing ring 51 and the electrode connector 1 are in an interference fit. The electrode connector 1 compresses the first sealing ring 51, causing deformation, thus forming a third sealing point. This first sealing element 5 achieves sealing between the electrode connector 1 and the sleeve 3 in both the axial and radial directions. Furthermore, because the first sealing element 5 is elastically deformable, it can be adapted to different types of electrode connectors 1. Simultaneously, due to the elasticity of the first sealing element 5, while it is being compressed and deformed to achieve sealing, the reaction force of the first sealing element 5 causes the connection between the first threaded section 32 and the second threaded section 11 to form a self-locking connection, making them less prone to loosening.

[0061] See Figure 7 and Figure 8 As shown, the first threaded section 32 includes a first internal thread on the inner side wall of the sleeve 3, and the second threaded section 11 includes a first external thread on the outer side wall of the electrode connector 1. Before the electrode connector 1 is connected to the sleeve 3, thread sealant can be applied to the first internal thread or the first external thread. After the electrode connector 1 is connected to the sleeve 3, it cannot be disassembled to prevent loosening between the electrode connector 1 and the sleeve 3 during use.

[0062] In some embodiments, combined with Figure 5 , Figure 10 and Figure 11As shown, the nut 4 is provided with a second sealing element 6. The second sealing element 6 includes a first sealing ring 61 and a second sealing ring 62 arranged coaxially. The first sealing ring 61 is connected to the second sealing ring 62. The outer diameter of the first sealing ring 61 is larger than the outer diameter of the second sealing ring 62. The second sealing ring 62 is inserted into the sleeve 3. The first sealing ring 61 is located between the second end of the sleeve 3 and the end side wall of the nut 4. The first sealing ring 61 and the second sealing ring 62 are used for the cable 100 to pass through. The inner side wall of the first sealing ring 61 is used to abut against the cable 100, thereby achieving a seal between the cable 100 and the nut 4. The first sealing ring 61 abuts against the end side wall of the nut 4 to prevent external water from flowing into the nut 4, thus having a waterproof function. When the nut 4 is connected to the sleeve 3, the second end of the sleeve 3 presses against the first sealing ring 61, causing the first sealing ring 61 to abut against the inner and end walls of the nut 4, and also against the cable 100, thus achieving an effective seal between the nut 4, the sleeve 3, and the cable 100. The addition of a second sealing ring 62 lengthens the second sealing element 6, increasing the creepage distance from the end of the cable 100 connected to the terminal assembly 2 to the sealing point between the second sealing element 6 and the sleeve 3, making the photovoltaic connector more reliable and safe. Different lengths of the second sealing ring 62 can be matched according to the cable diameter to meet the creepage distance requirements.

[0063] The second sealing element 6 is made of an elastic material, such as rubber or silicone, to improve sealing performance and to be suitable for the installation of cables 100 with different outer diameters, and to form a sealing point between the cable 100 and the second sealing element 6.

[0064] The inner wall of one end of the nut 4 has a third threaded section 41, and the outer wall of the second end of the sleeve 3 has a fourth threaded section 33. The third threaded section 41 and the fourth threaded section 33 are threadedly connected. The third threaded section 41 includes a second internal thread on the inner wall of the nut 4, and the fourth threaded section 33 includes a second external thread on the outer wall of the sleeve 3. The second external thread is threaded to the second internal thread. Before connecting the nut 4 and the sleeve 3, thread-locking adhesive can be applied to the second internal thread or the second external thread. After the nut 4 and the sleeve 3 are connected, they cannot be disassembled to prevent loosening between the nut 4 and the sleeve 3 during use.

[0065] Optionally, the first sealing ring 61 has a conical structure, and the second sealing ring 62 has a cylindrical structure. The small end of the first sealing ring 61 is connected to one end of the second sealing ring 62, and the outer wall of the large end of the first sealing ring 61 abuts against the inner wall of the nut 4. The outer wall of the second sealing ring 62 abuts against the inner wall of the sleeve 3. When the second end of the sleeve 3 presses against the first sealing ring 61, the deformation space of the first sealing ring 61 is large, which can increase the abutment area between the first sealing ring 61 and the inner wall of the nut 4, even after the first sealing ring 61 has already abutted against the inner wall of the nut 4. The second sealing ring 62 is configured as a cylindrical structure adapted to the inner wall of the sleeve 3.

[0066] In some embodiments, such as Figure 3 , Figure 4 , Figure 12 and Figure 13 As shown, the terminal assembly 2 includes a terminal piece 21 and a fixing member 22. The terminal piece 21 includes a riveting portion 211, which is used to cover and press the wire core of the cable 100. The fixing member 22 is sleeved on the riveting portion 211 and extends to the position where the cable 100 has a wire sheath. The fixing member 22 presses the riveting portion 211, the wire core of the cable 100, and the wire sheath of the cable. During temperature changes, the structural strength of the fixing member 22 can effectively prevent the riveting portion 211 from loosening its pressing on the wire core, thereby preventing the contact resistance from increasing and causing overheating. The fixing member 22 extends to the position where the cable 100 has a wire sheath and presses the wire sheath of the cable 100. When the cable 100 swings, it effectively prevents the riveting portion 211 from squeezing or cutting the wire core, thereby preventing the wire core from breaking. The riveting part 211 presses the wire core, and the fixing part 22 presses the riveting part 211. The wire core and the wire sheath of the cable 100 can be crimped in one step or in stages. For example Figure 14 and Figure 15 As shown, the cable 100 is usually made of multiple strands of wire cores twisted together. After riveting, the wire cores are squeezed and deformed and misaligned. The surface oxide layer of the wire cores is destroyed, and the electrical connection between the wire cores and between the wire cores and the riveting part 211 is reliable and stable.

[0067] like Figure 15 and Figure 17 As shown, the riveting part 211 is an open arc-shaped structure, and the wire core of the cable 100 is placed inside the open arc-shaped structure. Optionally, the cross-sectional shape of the riveting part 211 is U-shaped, and the wire core of the cable 100 is placed inside the U-shaped structure. The two ends of the riveting part 211 are bent in opposite directions and the wire core is squeezed to fix the wire core to the riveting part 211.

[0068] The material of the fastener 22 and the wire core can be the same metal or the same type of metal alloy to avoid electrochemical corrosion between the two, thereby reducing the contact resistance between the terminal assembly 2 and the wire core.

[0069] Optionally, the riveting part 211 is made of metallic copper or copper alloy, the fastener 22 is made of metallic copper or copper alloy, and the wire core of the cable 100 is made of metallic copper or copper alloy. While ensuring that the riveting part 211 can reliably and stably press the wire core, the contact resistance between the terminal assembly 2 and the wire core can be reduced.

[0070] The riveting part 211 is made of copper or copper alloy, the fastener 22 is made of aluminum or aluminum alloy, and the wire core of the cable 100 is made of aluminum or aluminum alloy, so as to realize the connection between the terminal assembly 2 and the aluminum core cable. While ensuring that the riveting part 211 presses the wire core stably and reliably, it can reduce the contact resistance between the terminal assembly 2 and the wire core.

[0071] In some embodiments, to prevent electrochemical corrosion between the riveting portion 211 and the wire core, the riveting portion 211 is covered with a tin-plated layer, thereby preventing direct contact between the wire core and the fixing member 22 and the riveting portion 211. The tin-plated layer has a large plating thickness to prevent tearing of the tin-plated layer due to deformation of the riveting portion 211 during the crimping process, thus more effectively preventing electrochemical corrosion caused by direct contact between the riveting portion 211 and the aluminum wire core.

[0072] In some embodiments, a conductive paste layer is provided between the riveting part 211 and the wire core of the cable 100. The conductive paste layer is formed of conductive paste and fills the space between the riveting part 211 and the wire core. For example, before crimping the riveting part 211, conductive paste can be applied to at least one of the riveting part 211 and the wire core. Preferably, conductive paste is applied to the wire core. After crimping the riveting part 211, the conductive paste can fill the gap between the riveting part 211 and the wire core and can isolate the wire core from contact with air, effectively preventing oxidation of the wire core.

[0073] In some embodiments, the expansion coefficient of the fixing member 22 is the same as or similar to that of the wire core of the cable 100. The fixing member 22 covers and presses the riveting part 211, the wire core, and the sheath of the cable 100. The terminal member 21 and the wire core are both conductive to the fixing member 22, which can effectively reduce the resistance at the connection between the terminal assembly 2 and the cable 100, increase the conductive contact area of ​​the terminal member 21 to reduce the contact resistance, and thus reduce heat generation. Moreover, the expansion coefficients of the fixing member 22 and the wire core are the same or similar, which effectively prevents the pressing of the fixing member 22 on the wire core from loosening, making the electrical connection between the terminal member 21 and the cable 100 stable and reliable. In this embodiment, the expansion coefficient of the fixing member 22 being similar to that of the wire core means that the difference between their expansion coefficients is less than 20 μm / m·K.

[0074] In some embodiments, such as Figure 18As shown, the fastener 22 has an opening 221, which is arranged along the axial direction of the fastener 22, and the first end of the opening 221 passes through one end of the fastener 22. In this embodiment, by providing the opening 221, even if the riveting part 211 undergoes a large deformation after being pressed, the fastener 22 can still be smoothly fitted onto the outside of the riveting part 211, thereby realizing the pressing of the fastener 22 onto the riveting part 211.

[0075] In other embodiments, such as Figure 19 As shown, the fastener 22 is provided with an opening 221, which is arranged along the axial direction of the fastener 22. Both ends of the opening 221 pass through both ends of the fastener 22. The fastener 22 is an open ring sleeve. When the fastener 22 is pressed, the fastener 22 is more likely to deform. The fastener 22 can also be smoothly fitted onto the outside of the riveting part 211, thereby realizing the pressing of the fastener 22 onto the riveting part 211.

[0076] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A photovoltaic connector, characterized in that, include: Electrode connector (1); Terminal assembly (2) is disposed within the electrode connector (1); Sleeve (3), the first end of the sleeve (3) is sleeved on the outside of one end of the electrode connector (1), and the sleeve (3) is threadedly connected to the electrode connector (1). Nut (4), one end of the nut (4) is sleeved on the outside of the second end of the sleeve (3), and the nut (4) is threadedly connected to the sleeve (3). The nut (4), the sleeve (3) and the electrode connector (1) form a through hole for the cable (100) to pass through, so that the cable (100) can be connected to the terminal assembly (2).

2. The photovoltaic connector according to claim 1, characterized in that, The inner wall of the first end of the sleeve (3) is provided with a sealing groove (31) and a first threaded section (32) in sequence from the port inward. The inner diameter of the sealing groove (31) is larger than the inner diameter of the first threaded section (32). A first sealing element (5) is provided in the sealing groove (31). One end of the electrode connector (1) is threaded through the first sealing element (5) and connected to the first threaded section (32).

3. The photovoltaic connector according to claim 2, characterized in that, The first sealing element (5) includes a first sealing ring (51) and a second sealing ring (52) arranged coaxially. The inner diameter of the first sealing ring (51) is larger than the inner diameter of the second sealing ring (52). The outer side wall of one end of the electrode connector (1) is provided with a second threaded section (11) and a limiting part (12) in sequence along the axial direction from the end. The outer diameter of the limiting part (12) is larger than the outer diameter of the second threaded section (11). A part of the second threaded section (11) is threaded to the first threaded section (32). The second sealing ring (52) is sleeved on the outside of another part of the second threaded section (11). The first sealing ring (51) is sleeved on the outside of the limiting part (12), and the limiting part (12) abuts against the end face of the second sealing ring (52). The outer side wall of the first sealing ring (51) and the outer side wall of the second sealing ring (52) abut against the groove wall of the sealing groove (31).

4. The photovoltaic connector according to claim 1, characterized in that, The nut (4) is provided with a second sealing element (6), which includes a first sealing ring (61) and a second sealing ring (62) arranged coaxially. The outer diameter of the first sealing ring (61) is larger than the outer diameter of the second sealing ring (62). The second sealing ring (62) is inserted into the sleeve (3). The first sealing ring (61) is located between the second end of the sleeve (3) and the end side wall of the nut (4). The first sealing ring (61) and the second sealing ring (62) are used for the cable (100) to pass through, and the inner side wall of the first sealing ring (61) is used to abut against the cable (100).

5. The photovoltaic connector according to claim 4, characterized in that, The first sealing ring (61) has a conical structure, and the second sealing ring (62) has a cylindrical structure. The small end of the first sealing ring (61) is connected to one end of the second sealing ring (62). The outer side wall of the large end of the first sealing ring (61) abuts against the inner side wall of the nut (4), and the outer side wall of the second sealing ring (62) abuts against the inner side wall of the sleeve (3).

6. The photovoltaic connector according to any one of claims 1-5, characterized in that, The terminal assembly (2) includes a terminal piece (21) and a fixing piece (22). The terminal piece (21) includes a riveting part (211) for covering and pressing the core of the cable (100). The fixing piece (22) is sleeved on the riveting part (211) and extends to the position where the cable (100) has a sheath. The fixing piece (22) presses the riveting part (211), the core of the cable (100), and the sheath of the cable (100).

7. The photovoltaic connector according to claim 6, characterized in that, The expansion coefficient of the fixing member (22) is the same as that of the wire core of the cable (100).

8. The photovoltaic connector according to claim 6, characterized in that, The riveting part (211) is made of copper or copper alloy, the fastener (22) is made of aluminum or aluminum alloy, and the core of the cable (100) is made of aluminum or aluminum alloy.

9. The photovoltaic connector according to claim 6, characterized in that, The riveting part (211) is made of copper or copper alloy, the fastener (22) is made of copper or copper alloy, and the core of the cable (100) is made of copper or copper alloy.

10. The photovoltaic connector according to claim 6, characterized in that, The riveted part (211) is covered with a tin-plated layer.

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