Photovoltaic connector

Abstract

The invention belongs to the technical field of photovoltaic power generation, and particularly discloses a photovoltaic connector. According to the photovoltaic connector provided by the invention, the sleeve is matched on the basis of the electrode contact and the screw cap which have the unified standard structure in the prior art, and the sleeve can be connected with the electrode contact and the screw cap which have the unified standard structure while meeting cable penetration; therefore, the electrode contact of the photovoltaic connector with the structure can be connected with an electrode contact of a photovoltaic connector suitable for a small-wire-diameter cable in the prior art in a matching manner, and the photovoltaic connector with the structure can be connected with a large-wire-diameter cable. The invention relates to a photovoltaic connector, in particular to a photovoltaic connector suitable for a large-wire-diameter cable, and solves the problems that in the prior art, a photovoltaic connector cannot be matched with a conventional photovoltaic connector due to the fact that the specification of the cable is improved, the conventional photovoltaic connector needs to be replaced with the photovoltaic connector suitable for the large-wire-diameter cable, the overall cost is increased, and mutual matching between photovoltaic connectors of different specifications cannot be achieved. And the development and application cost is reduced.

Description

Technical Field

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

[0002] Existing photovoltaic connectors are mainly suitable for cables with smaller wire diameters (such as 2.5mm 2 ~6mm 2 With the development of the photovoltaic industry, the electrode and connector structures of photovoltaic connectors have adopted a unified standard structure. However, as photovoltaics continue to reduce costs and increase efficiency, power plants need to further reduce power transmission losses to improve the overall power generation efficiency of photovoltaic systems. To address these technical issues, the use of large-diameter, high-current-carrying copper and aluminum alloy cables has become a trend in future cost reduction and efficiency improvement.

[0003] Photovoltaic connectors suitable for cables with large wire diameters are relatively rare. At present, photovoltaic connectors suitable for cables with large wire diameters mainly meet the use requirements by expanding the space inside the photovoltaic connector and increasing the total length of the photovoltaic connector. Due to the improvement of cable specifications, the photovoltaic connector cannot be adapted to conventional photovoltaic connectors. Conventional photovoltaic connectors need to be replaced with photovoltaic connectors suitable for cables with large wire diameters. This not only leads to an increase in overall costs, but also fails to solve the problem of intercompatibility between photovoltaic connectors of different specifications, which increases the development and application costs to a certain extent. Summary of the Invention

[0004] The object of the present invention is to provide a photovoltaic connector that is suitable for connecting to cables with large wire diameters and can be intermateably connected with photovoltaic connectors suitable for cables with small wire diameters, thereby reducing development and application costs.

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

[0006] Photovoltaic connectors, including:

[0007] Electrode connector;

[0008] a terminal assembly, disposed in the electrode connector;

[0009] a sleeve, wherein a first end of the sleeve 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 sleeved on the outside of the second end of the sleeve, and the nut is threadedly connected to the sleeve, and the nut, the sleeve and the electrode connector form a through hole for the cable to pass through, so that the cable is connected to the terminal assembly.

[0011] As an optional technical solution for the above-mentioned photovoltaic connector, the inner side 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, and a first sealing member is provided in the sealing groove. One end of the electrode connector is passed through the first sealing member and is threadedly connected to the first threaded section.

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

[0013] As an optional technical solution of the above-mentioned photovoltaic connector, a second seal is provided in the nut, and the second seal 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 in the sleeve, and the first sealing ring is arranged between the second end portion of the sleeve and the end side wall of the nut, the first sealing ring and the second sealing ring are used for cable passage, and the inner side wall of the first sealing ring is used to abut against the cable.

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

[0015] As an optional technical solution of the above-mentioned photovoltaic connector, the terminal assembly includes a terminal piece and a fixing piece, the terminal piece includes a riveted portion, the riveted portion is used to cover and compress the wire core of the cable, the fixing piece is sleeved on the riveted portion, and the fixing piece extends to the position where the cable has a wire sheath, and the fixing piece presses the riveted portion, the wire core of the cable and the wire sheath of the cable.

[0016] As an optional technical solution of the above-mentioned photovoltaic connector, the expansion coefficient of the fixing member is the same as that of the core of the cable.

[0017] As an optional technical solution of the above-mentioned photovoltaic connector, the riveted part is made of metal copper or copper alloy, the fixing part is made of metal aluminum or aluminum alloy, and the core of the cable is made of metal aluminum or aluminum alloy.

[0018] As an optional technical solution of the above-mentioned photovoltaic connector, the riveted part is made of metal copper or copper alloy, the fixing part is made of metal copper or copper alloy, and the core of the cable is made of metal copper or copper alloy.

[0019] As an optional technical solution of the above-mentioned photovoltaic connector, the riveted portion is coated with a tin-plated layer.

[0020] Beneficial effects of the present invention:

[0021] The photovoltaic connector provided by the present invention has one end of the sleeve sleeved on the outside of one end of the electrode connector, and the electrode connector is threadedly connected to the sleeve, one end of the nut is sleeved on the outside of the other end of the sleeve, and the other end of the sleeve is threadedly connected to the nut, the electrode connector, the sleeve and the nut are detachable from each other, the electrode connector is a positive connector or a negative connector, in actual application, the electrode connector of one photovoltaic connector needs to be connected to the electrode connector of another photovoltaic connector, the electrode connectors of the two photovoltaic connectors are electrically opposite, and the electrode connectors of the two photovoltaic connectors need to be adapted, the present invention realizes matching the sleeve on the basis of the electrode connector and nut with a unified standard structure in the prior art, the sleeve can meet the cable threading requirements while also being connected to the electrode connector and nut with a unified standard structure, so that the structure The electrode connector of the photovoltaic connector can be intermateably connected with the electrode connector of the photovoltaic connector suitable for small-diameter cables in the prior art, and one end of the sleeve of the photovoltaic connector of this structure is sleeved on the outside of one end of the electrode connector, so the size of the sleeve is larger than the size of the electrode connector, and the internal space of the sleeve is increased, which can accommodate cables with large wire diameters with wire sheaths. The wire core without the wire sheath is small in size and can be connected to the electrode connector in the prior art, without the need to develop a new electrode connector. This solves the problem that the photovoltaic connector in the prior art cannot be adapted to the conventional photovoltaic connector due to the improvement of cable specifications, and the conventional photovoltaic connector needs to be replaced with a photovoltaic connector suitable for large-diameter cables, which not only leads to an increase in overall cost, but also fails to solve the problem of intermate between photovoltaic connectors of different specifications, thereby reducing development and application costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is an assembly diagram of a positive-type photovoltaic connector provided by an embodiment of the present invention;

[0023] Figure 2 This is an assembly diagram of a negative-type photovoltaic connector provided by an embodiment of the present invention;

[0024] Figure 3is an exploded view of a positive-type photovoltaic connector provided by an embodiment of the present invention;

[0025] Figure 4 is an exploded view of a negative-pole type photovoltaic connector provided by an embodiment of the present invention;

[0026] Figure 5 is a cross-sectional view of a photovoltaic connector provided by an embodiment of the present invention;

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

[0028] Figure 7 is a cross-sectional view of a sleeve provided by an embodiment of the present invention;

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

[0030] Figure 9 is a schematic structural diagram of a first sealing member provided by an embodiment of the present invention;

[0031] Figure 10 is a schematic structural diagram of a second sealing member provided by an embodiment of the present invention;

[0032] Figure 11 yes Figure 5 A magnified schematic diagram of the structure at B;

[0033] Figure 12 is a structural diagram of a terminal assembly provided by an embodiment of the present invention;

[0034] Figure 13 is a partial cross-sectional view of the riveted portion, the core of the cable, and the fixing member provided by an embodiment of the present invention;

[0035] Figure 14 is a cross-sectional view of the riveted portion, the core of the cable, and the fixing member provided by an embodiment of the present invention;

[0036] Figure 15 is a cross-sectional view of the riveted connection between the core and the fixing member of the cable provided by an embodiment of the present invention;

[0037] Figure 16 1 is a schematic diagram of the assembly of the riveted portion and the core of the cable provided by an embodiment of the present invention;

[0038] Figure 17 1 is a schematic structural diagram of a wire core of a riveted cable provided by a riveted portion according to an embodiment of the present invention;

[0039] Figure 18 This is a structural schematic diagram of a fixing member with an opening provided in an embodiment of the present invention;

[0040] Figure 19 This is another structural schematic diagram of a fixing member with an opening provided in an embodiment of the present invention.

[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 connection section; 12. Limiting portion;

[0045] 21. Terminal piece; 211. Riveted portion; 22. Fixing piece; 221. Opening;

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

[0047] 41. third thread segment;

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

[0049] 61. First sealing ring; 62. Second sealing ring. DETAILED DESCRIPTION

[0050] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0051] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

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

[0053] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[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 in the electrode connector 1. The photovoltaic connector generally 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 in 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 sleeved outside 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 sleeved outside the second end of the sleeve 3, and the nut 4 is threadedly connected to the sleeve 3. The nut 4, sleeve 3, and electrode connector 1 form a through hole for the cable 100 to pass through, thereby connecting the cable 100 to the terminal assembly 2.

[0056] One end of the sleeve 3 is sleeved on the outside of one end of the electrode connector 1, and the electrode connector 1 is threadedly connected to the sleeve 3, and one end of the nut 4 is sleeved on 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 a positive connector or a negative connector. In actual applications, the electrode connector 1 of a photovoltaic connector needs to be connected to the electrode connector 1 of another photovoltaic connector. The electrode connectors 1 of the two photovoltaic connectors are electrically opposite, and the electrode connectors 1 of the two photovoltaic connectors need to be adapted. This embodiment achieves matching of the sleeve 3 on the basis of the electrode connector 1 and nut 4 with a unified standard structure in the prior art. The sleeve 3 can meet the requirements of the cable 100 while also being connected to the electrode connector 1 and nut 4 with a unified standard structure. The electrode connector 1 of the photovoltaic connector with this structure can be intermateably connected with the electrode connector of the photovoltaic connector suitable for small-diameter cables in the prior art, and one end of the sleeve 3 of the photovoltaic connector with this structure is sleeved on the outside of one end of the electrode connector 1, so 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 cables with large wire diameters with wire sheaths. The wire core without the wire sheath part is small in size and can be connected to the electrode connector 1 in the prior art, without the need to develop a new electrode connector 1, which solves the problem that the photovoltaic connector in the prior art cannot be adapted to the conventional photovoltaic connector due to the improvement of cable specifications, and the conventional photovoltaic connector needs to be replaced with a photovoltaic connector suitable for large-diameter cables, which not only leads to an increase in overall cost, but also cannot solve the problem of intermate between photovoltaic connectors of different specifications, thereby reducing development and application costs.

[0057] When producing a photovoltaic connector, 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 provided on the inner side of the sleeve 3 is adapted to the thread structure provided on the outer side of the electrode connector 1. The sleeve 3 can be designed and produced 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 different sizes. The electrode connector 1 and nut 4 can be electrode connectors 1 and nuts 4 with a unified standard structure in the prior art. One end of the sleeve 3 of the photovoltaic connector provided in this embodiment is sleeved on the outside of one end of the electrode connector 1. 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 to accommodate cables with large wire diameters with wire sheaths. The core size of the cable without the wire sheath is small and 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. The internal space of the nut 4 is increased to accommodate cables with large wire diameters with wire sheaths. The photovoltaic connector in this embodiment does not need to develop a new electrode connector and nut structure under the premise of being suitable for large-diameter cables 100, thereby reducing development costs. The diameter of the hole on the nut for the cable to pass through can be adapted to the outer diameter of the cable, without changing other structures of the nut in the prior art. In actual applications, the electrode connector 1 of the photovoltaic connector can be mutually connected with the electrode connector of the photovoltaic connector in the prior art that is suitable for small-diameter cables, without having to replace the conventional photovoltaic connector with a photovoltaic connector that is suitable for large-diameter cables 100, thereby reducing overall use 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 cables 100 with large wire diameters.

[0058] In some embodiments, as Figures 5 to 8 As shown, the inner sidewall 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 member 5 is provided in the sealing groove 31. One end of the electrode connector 1 passes through the first sealing member 5 and is threadedly connected to the first threaded section 32. The provision of the first sealing member 5 achieves a sealed connection between the sleeve 3 and the electrode connector 1, and the provision of the sealing groove 31 provides space for securely accommodating the first sealing member 5.

[0059] Alternatively, as Figure 8 and Figure 9As shown, the first sealing member 5 includes a coaxially arranged first sealing ring 51 and a second sealing ring 52. The inner diameter of the first sealing ring 51 is larger than that 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 stopper 12 in axial order from the end. The outer diameter of the stopper 12 is larger than that of the second threaded section 11. A portion of the second threaded section 11 is threadedly connected to the first threaded section 32. The second sealing ring 52 is sleeved on the outer side 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 stopper 12. The first sealing ring 51 is sleeved on the outer side of the stopper 12, and the stopper 12 abuts the end surface of the second sealing ring 52, forming a first sealing point between the stopper 12 and the end surface of the second sealing ring 52. The outer walls of the first sealing ring 51 and the second sealing ring 52 both abut the groove wall of the sealing groove 31, forming a second sealing point. The second sealing ring 52 is sleeved on the outer side of another portion of the second threaded section 11 to form a third sealing point.

[0060] During the connection between the second threaded section 11 of the electrode connector 1 and the first threaded section 32, the limiting portion 12 squeezes the second sealing ring 52 to form the above-mentioned first sealing point and second sealing point. Usually, the first sealing member 5 is made of an elastic material, such as rubber, silicone, etc., to improve the sealing performance. Therefore, when the first sealing member 5 is passed through the electrode connector 1, the first sealing ring 51 and the electrode connector 1 are interference fit, and the electrode connector 1 squeezes the first sealing ring 51 to deform, so that a third sealing point can be formed. The first sealing member 5 is provided to achieve sealing between the electrode connector 1 and the sleeve 3 in the axial direction and in the radial direction, and because the first sealing member 5 is elastically deformable, it can be adapted to different types of electrode connectors 1. At the same time, because the first sealing member 5 is elastic, when the first sealing member 5 is squeezed and deformed to achieve sealing, the reaction force of the first sealing member 5 causes the connection between the first threaded section 32 and the second threaded section 11 to form a self-locking, and the two are not easy to loosen.

[0061] See also Figure 7 and Figure 8 As shown, the first threaded section 32 includes a first internal thread provided on the inner wall of the sleeve 3, and the second threaded section 11 includes a first external thread provided on the outer wall of the electrode connector 1. Before the electrode connector 1 is connected to the sleeve 3, thread glue 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 Figure 5 、 Figure 10 and Figure 11As shown, a second sealing member 6 is provided in the nut 4, and the second sealing member 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, and the outer diameter of the first sealing ring 61 is greater than the outer diameter of the second sealing ring 62. The second sealing ring 62 is inserted in the sleeve 3, and the first sealing ring 61 is provided between the second end portion 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 passing the cable 100, and the inner side wall of the first sealing ring 61 is used to abut against the cable 100, thereby realizing the sealing between the cable 100 and the nut 4, and 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, thereby having a waterproof effect. When the nut 4 is connected to the sleeve 3, the second end of the sleeve 3 squeezes the first sealing ring 61, causing it to abut against the inner and end sidewalls of the nut 4, and also against the cable 100, achieving an effective seal between the nut 4, sleeve 3, and cable 100. The provision of a second sealing ring 62 increases the length of the second sealing element 6, increasing the creepage distance from the end where the cable 100 is connected to the terminal assembly 2 to the sealing point between the second sealing element 6 and the sleeve 3, making the performance of the photovoltaic connector safer and more reliable. Different lengths of second sealing ring 62 can be used depending on the cable diameter to meet the creepage distance requirements.

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

[0064] A third threaded segment 41 is provided on the inner sidewall of one end of the nut 4, and a fourth threaded segment 33 is provided on the outer sidewall of the second end of the sleeve 3. The third threaded segment 41 is threadedly connected to the fourth threaded segment 33. The third threaded segment 41 includes a second internal thread provided on the inner sidewall of the nut 4, and the fourth threaded segment 33 includes a second external thread provided on the outer sidewall of the sleeve 3. The second external thread is threadedly connected to the second internal thread. Before the nut 4 is connected to the sleeve 3, thread glue can be applied to the second internal thread or the second external thread. After the nut 4 is connected to the sleeve 3, it 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 straight cylindrical structure. The small end of the first sealing ring 61 is connected to one end of the second sealing ring 62. The outer wall of the large end of the first sealing ring 61 abuts the inner wall of the nut 4, and the outer wall of the second sealing ring 62 abuts the inner wall of the sleeve 3. When the second end of the sleeve 3 presses against the first sealing ring 61, the first sealing ring 61 has a large deformation space, which can increase the area of contact between the first sealing ring 61 and the inner wall of the nut 4, provided that the first sealing ring 61 already abuts the inner wall of the nut 4. The second sealing ring 62 is configured as a straight cylindrical structure that matches the inner wall of the sleeve 3.

[0066] In some embodiments, as Figure 3 、 Figure 4 、 Figure 12 and Figure 13 As shown, the terminal assembly 2 includes a terminal piece 21 and a fixing piece 22. The terminal piece 21 includes a riveted portion 211. The riveted portion 211 is used to cover and compress the wire core of the cable 100. The fixing piece 22 is sleeved on the riveted portion 211, and the fixing piece 22 extends to the position where the cable 100 has a wire sheath. The fixing piece 22 compresses the riveted 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 piece 22 can effectively prevent the riveted portion 211 from loosening the pressure on the wire core, thereby preventing the contact resistance from increasing and causing heat to occur. The fixing piece 22 extends to the position where the cable 100 has a wire sheath and compresses the wire sheath of the cable 100. When the cable 100 swings, it effectively prevents the riveted portion 211 from squeezing or cutting the wire core, thereby preventing the wire core from breaking. The rivet 211 presses the wire core and the fixing member 22 presses the rivet 211, the wire core of the cable 100 and the wire sheath of the cable 100 can be crimped at one time or in steps. Figure 14 and Figure 15 As shown, the cable 100 is usually formed by twisting multiple wire cores. After riveting, the wire cores are squeezed, deformed, and dislocated, and the surface oxide layer of the wire cores is destroyed. The electrical connection between the wire cores and between the wire cores and the riveted part 211 is reliable and stable.

[0067] like Figure 15 and Figure 17 As shown, the riveted portion 211 is an open arc-shaped structure, and the core of the cable 100 is placed on the inner side of the open arc-shaped structure. Optionally, the cross-sectional shape of the riveted portion 211 is U-shaped, and the core of the cable 100 is placed in the U-shaped structure. The two ends of the riveted portion 211 are bent in opposite directions and squeeze the core to fix the core on the riveted portion 211.

[0068] The material of the fixing member 22 and the material of 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 riveted part 211 is made of metallic copper or copper alloy, the fixing part 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 riveted part 211 presses the wire core stably and reliably, the contact resistance between the terminal assembly 2 and the wire core can be reduced.

[0070] The material of the riveted part 211 is metal copper or copper alloy, the material of the fixing part 22 is metal aluminum or aluminum alloy, and the material of the wire core of the cable 100 is metal aluminum or aluminum alloy, so as to realize the connection between the terminal assembly 2 and the aluminum core cable. While ensuring that the riveted part 211 presses the wire core stably and reliably, the contact resistance between the terminal assembly 2 and the wire core can be reduced.

[0071] In some embodiments, to prevent electrochemical corrosion between the rivet 211 and the wire core, the rivet 211 is coated with a tinned layer, thereby preventing the wire core and the fixing member 22 from directly contacting the rivet 211. The tinned layer has a relatively large thickness to prevent the rivet 211 from being torn due to deformation during the crimping process, thereby more effectively preventing the rivet 211 from directly contacting the aluminum wire core and causing electrochemical corrosion.

[0072] In some embodiments, a conductive paste layer is provided between the rivet 211 and the core of the cable 100. The conductive paste layer is formed of conductive paste, and the conductive paste is filled between the rivet 211 and the core. For example, before the rivet 211 is crimped, the conductive paste can be applied to at least one of the rivet 211 and the core, preferably the core. After the rivet 211 is crimped, the conductive paste can fill the gap between the rivet 211 and the core, isolating the core from air and effectively preventing oxidation of the core.

[0073] In some embodiments, the coefficient of expansion of the fixing member 22 is the same as or similar to that of the core of the cable 100. The fixing member 22 covers and compresses the rivet 211, the core, and the sheath of the cable 100. The terminal 21 and the core are both electrically conductive to the fixing member 22, effectively reducing the resistance at the connection between the terminal assembly 2 and the cable 100, increasing the conductive contact area of the terminal 21 to reduce contact resistance, and thereby reducing heat generation. Furthermore, the coefficient of expansion of the fixing member 22 and the core is the same as or similar to that of the core, effectively preventing the fixing member 22 from loosening its pressure on the core, thereby ensuring a stable and reliable electrical connection between the terminal 21 and the cable 100. In this embodiment, the coefficient of expansion of the fixing member 22 is similar to that of the core, meaning that the difference between the two coefficients of expansion is less than 20 μm / m·K.

[0074] In some embodiments, as Figure 18As shown, the fixing member 22 is provided with an opening 221, which is arranged along the axial direction of the fixing member 22, and a first end of the opening 221 passes through one end of the fixing member 22. In this embodiment, the provision of the opening 221 allows the fixing member 22 to be smoothly sleeved on the outside of the riveted portion 211 even if the riveted portion 211 undergoes significant deformation after crimping, thereby achieving crimping of the fixing member 22 to the riveted portion 211.

[0075] In other embodiments, Figure 19 As shown, the fixing member 22 is provided with an opening 221, and the opening 221 is arranged along the axial direction of the fixing member 22. The two ends of the opening 221 pass through the two ends of the fixing member 22. The fixing member 22 is an open ring sleeve. When the fixing member 22 is crimped, the fixing member 22 is more likely to be deformed, and the fixing member 22 can also be smoothly sleeved on the outside of the riveted portion 211, thereby realizing the crimping of the fixing member 22 to the riveted portion 211.

[0076] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Photovoltaic connector, characterized in that, include: Electrode connector (1); A terminal assembly (2) is arranged in the electrode connector (1); A sleeve (3), wherein a 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); A nut (4), one end of which is sleeved on the outside of the second end of the sleeve (3), and the nut (4) is threadedly connected to the sleeve (3), and 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) is connected to the terminal assembly (2).

2. The photovoltaic connector according to claim 1, characterized in that: The inner side wall of the first end of the sleeve (3) is provided with a sealing groove (31) and a first screw-connecting 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 screw-connecting section (32), a first sealing member (5) is provided in the sealing groove (31), and one end of the electrode connector (1) is passed through the first sealing member (5) and is threadedly connected to the first screw-connecting section (32).

3. The photovoltaic connector according to claim 2, characterized in that: The first sealing member (5) comprises a first sealing ring (51) and a second sealing ring (52) which are 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 screw connection section (11) and a limiting portion (12) in sequence along the axial direction from the end. The outer diameter of the limiting portion (12) is larger than the outer diameter of the second screw connection section (11). A portion of the second screw connection section (11) is screwed to the first screw connection section (32). The second sealing ring (52) is sleeved on the outer side of another portion of the second screw connection section (11). The first sealing ring (51) is sleeved on the outer side of the limiting portion (12), and the limiting portion (12) abuts against the end face of the second sealing ring (52). The outer wall of the first sealing ring (51) and the outer wall of the second sealing ring (52) both abut against the groove wall of the sealing groove (31).

4. The photovoltaic connector according to claim 1, characterized in that: A second sealing member (6) is provided in the nut (4), and the second sealing member (6) includes a first sealing ring (61) and a second sealing ring (62) which are coaxially arranged. 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 provided between the second end portion 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 allowing 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) is a conical structure, and the second sealing ring (62) is a straight cylindrical structure. The small end of the first sealing ring (61) is connected to one end of the second sealing ring (62). The outer wall of the large end of the first sealing ring (61) abuts against the inner wall of the nut (4), and the outer wall of the second sealing ring (62) abuts against the inner wall of the sleeve (3).

6. The photovoltaic connector according to any one of claims 1 to 5, characterized in that: The terminal assembly (2) includes a terminal piece (21) and a fixing piece (22), the terminal piece (21) includes a riveted portion (211), the riveted portion (211) is used to cover and compress the wire core of the cable (100), the fixing piece (22) is sleeved on the riveted portion (211), and the fixing piece (22) extends to the position where the cable (100) has a wire sheath, and the fixing piece (22) compresses the riveted portion (211), the wire core of the cable (100), and the wire sheath of the cable (100).

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

8. The photovoltaic connector according to claim 6, characterized in that: The material of the riveted portion (211) is metal copper or copper alloy, the material of the fixing member (22) is metal aluminum or aluminum alloy, and the material of the wire core of the cable (100) is metal aluminum or aluminum alloy.

9. The photovoltaic connector according to claim 6, characterized in that: The material of the riveted portion (211) is metallic copper or a copper alloy, the material of the fixing member (22) is metallic copper or a copper alloy, and the material of the wire core of the cable (100) is metallic copper or a copper alloy.

10. The photovoltaic connector according to claim 6, characterized in that: The riveted portion (211) is coated with a tinned layer.

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