Photovoltaic connector, photovoltaic junction box and photovoltaic assembly

Abstract

The utility model relates to the field of photovoltaic technology, in particular to a photovoltaic connector, a photovoltaic junction box and a photovoltaic assembly. The device comprises a positive electrode connector, a negative electrode connector in plug-in connection with the positive electrode connector, and a sleeve type locking piece. The butt joint ends of the positive electrode connector and the negative electrode connector are provided with external threads. The two ends of the sleeve type locking piece are arranged at the butt joint ends of the positive electrode connector and the negative electrode connector in a sleeving mode respectively and are in threaded connection with the butt joint ends respectively. The connector has the advantages of being convenient to install, low in cost and the like, meanwhile, the sleeve type locking piece can be sequentially connected with the negative electrode connector and the positive electrode connector in a threaded mode, dual fastening and sealing guarantees are provided, and the sealing performance of the connecting position is remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, in particular to a photovoltaic connector, a photovoltaic junction box and a photovoltaic assembly. Background Art

[0002] As a key component in photovoltaic power generation systems, photovoltaic connectors are primarily used to connect circuits between photovoltaic panels, combiner boxes, inverters, and other equipment. Although photovoltaic connectors are only a relatively small component in a photovoltaic system, they play a vital role in the system's performance and safety.

[0003] Because photovoltaic systems are typically installed outdoors, photovoltaic connectors may be exposed to rain, dew, high humidity, and other conditions. However, existing photovoltaic connectors often directly mate with the positive connector, resulting in poor sealing at the joint. This allows moisture, airborne dust, and contaminants to penetrate through the joint, corroding the electrical connection points, affecting contact performance, increasing resistance, reducing power generation efficiency, and even causing localized overheating, ultimately damaging or burning the connector.

[0004] At high altitudes or in environments with corrosive gases, the inadequate sealing of the connector allows harmful gases to enter, corroding and oxidizing the metal components and shortening the connector's lifespan. Currently, the connector is sealed entirely with shrink tubing or protective boxes, but this is costly and inconvenient to install.

[0005] As far as the current related technologies are concerned, in order to improve the sealing performance of the photovoltaic connector plug-in point, a cold shrink tube or a protective box is usually used to seal the entire connector. However, this method is costly and not convenient to install.

[0006] Based on this, the present invention studies and develops a new type of photovoltaic connector, photovoltaic junction box and photovoltaic assembly to solve the above problems. Utility Model Content

[0007] The first purpose of the present invention is to provide a photovoltaic connector, which has the characteristics of convenient installation, low cost, and good sealing.

[0008] The utility model adopts the following technical solution: a photovoltaic connector, which includes a positive connector, a negative connector plug-connected to the positive connector, and a sleeve-type locking member;

[0009] Wherein, the butt ends of the positive connector and the negative connector are both provided with external threads;

[0010] The two ends of the sleeve type locking member are respectively sleeved on the butt ends of the positive connector and the negative connector and are respectively threadedly connected thereto.

[0011] Furthermore, a first limiting protrusion is provided at the tail end of the external thread of the positive connector, so as to form a stop connection with the end face of the positive connector connection end of the sleeve-type locking member;

[0012] Or the tail end of the negative connector external thread is provided with a second limiting protrusion for forming a stop connection with the end face of the negative connector connection end of the sleeve-type locking member.

[0013] Furthermore, the first limiting protrusion and the second limiting protrusion are respectively arranged at intervals along the circumferential direction of the outer wall surface of the positive connector or the negative connector.

[0014] Furthermore, a surface of the first limiting protrusion opposite to the end surface of the positive connector connection end of the sleeve-type locking member is a plane;

[0015] Or the surface of the second limiting protrusion opposite to the end surface of the negative connector connection end of the sleeve-type locking member is a plane.

[0016] Furthermore, a first sealing ring is sleeved on the tail end of the external thread of the positive connector, and the positive connector connection end of the sleeve-type locking member squeezes the first sealing ring to achieve a sealed connection between the sleeve-type locking member and the positive connector;

[0017] And / or, a third sealing ring is sleeved on the tail end of the external thread of the negative connector, and the negative connector connecting end of the sleeve-type locking member squeezes the third sealing ring to achieve a sealed connection between the sleeve-type locking member and the negative connector.

[0018] Furthermore, the external thread of the negative electrode connector is divided into a first thread segment and a second thread segment which are arranged in sequence. A mounting groove is formed between the first thread segment and the second thread segment, and the second sealing ring is installed in the mounting groove.

[0019] Furthermore, a locking nut is provided on the negative connector. After the two ends of the sleeve-type locking piece are connected to the positive connector and the negative connector, the locking nut stops at the end surface of the negative connector connection end of the sleeve-type locking piece.

[0020] Furthermore, a first anti-slip pattern is provided on the outer wall surface of the sleeve-type locking member.

[0021] Compared with the related art, the beneficial effects of the present invention are:

[0022] When installing the photovoltaic connector in the present invention, the sleeve-type locking piece is first screwed into the butt end of the negative connector, then the positive connector is plugged into the negative connector, and finally the sleeve-type locking piece is screwed from the negative connector to the positive connector.

[0023] The photovoltaic connector in the utility model can be installed in steps, the operation process is clear and definite, and it is easy to operate and implement. The sleeve-type locking piece can be disassembled separately or integrated with the photovoltaic connector, making its installation more convenient.

[0024] At the same time, the sleeve-type locking piece can be threaded into the negative and positive connectors in sequence, providing dual fastening and sealing protection. This significantly enhances the sealing performance of the connection, effectively preventing the intrusion of foreign substances (such as moisture, dust, and harmful gases), while also preventing the infiltration of water vapor caused by shaking and vibration. This effectively ensures the normal operation of the connector and extends its service life. Moreover, the secondary sealing protection provided by the sleeve-type locking piece greatly reduces the risk of connector failure or even burning due to water vapor infiltration in high temperature and high humidity environments.

[0025] In addition, the photovoltaic connector has a relatively simple structure and low cost, and can meet higher sealing performance requirements, with good economy and practicality.

[0026] The second object of the present utility model is to provide a photovoltaic junction box, comprising the above-mentioned photovoltaic connector.

[0027] The third object of the present utility model is to provide a photovoltaic assembly, including the above-mentioned photovoltaic junction box. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 This is an exploded view of a photovoltaic connector in one embodiment of the present utility model;

[0030] Figure 2 for Figure 1 Schematic diagram of the positive connector structure;

[0031] Figure 3 for Figure 1 Schematic diagram of the structure after adding a locking nut to the middle negative connector;

[0032] In the figure: positive connector 1, elastic clamping claw 10, plug-in part 11, first limiting protrusion 12, first sealing ring 13; negative connector 2, socket 20, first threaded section 21, second threaded section 22, mounting groove 23, third sealing ring 24; sleeve-type locking member 3, first anti-slip groove 30, strip-shaped protrusion 31; locking nut 4, second anti-slip groove 40; nut 5. DETAILED DESCRIPTION

[0033] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] The following is combined with Figure 1 To the attached Figure 3 And specific embodiments describe the present invention in detail:

[0035] like Figures 1 to 3 As shown, the present invention provides a photovoltaic connector, which includes a positive connector 1, a negative connector 2 plug-connected to the positive connector 1, and a sleeve-type locking member 3.

[0036] Among them, the butt ends of the positive connector 1 and the negative connector 2 are both provided with external threads; the two ends of the sleeve-type locking member 3 are respectively sleeved on the butt ends of the positive connector 1 and the negative connector 2, and are respectively threadedly connected thereto. Preferably, the length of the sleeve-type locking member 3 is about one-third to one-third to two-thirds of the length of the negative connector 2. Such a length ratio can ensure that there is sufficient contact area and connection length between the sleeve-type locking member 3 and the negative connector 2, thereby providing sufficient connection strength and ensuring the stability and reliability of the connector during operation. If the sleeve-type locking member 3 is too short, it may not provide sufficient locking force and stability; if it is too long, it may increase the size of the overall structure, occupy too much space, and be detrimental to the miniaturization and compact design of the equipment. Within this length range, it is possible to better balance structural stability and space requirements while ensuring the connection effect.

[0037] When installing the photovoltaic connector in the present invention, first screw the sleeve-type locking member 3 into the docking end of the negative connector 2, then plug the positive connector 1 into the negative connector 2, and finally screw the sleeve-type locking member 3 from the negative connector 2 to the positive connector 1.

[0038] The photovoltaic connector in the present invention can be installed in steps, with a clear and precise operation process, easy to operate and implement, and the sleeve-type locking member 3 can be disassembled separately or integrated with the photovoltaic connector, making its installation more convenient. At the same time, the sleeve-type locking member 3 can be threadedly connected with the negative connector 2 and the positive connector 1 in turn, thereby providing double fastening and sealing protection, which significantly enhances the sealing performance of the connection, effectively preventing the intrusion of foreign substances (such as moisture, dust, harmful gases, etc.), and at the same time avoiding the infiltration of water vapor caused by shaking, vibration, etc., thereby effectively ensuring the normal operation of the connector and extending its service life. Moreover, the secondary sealing protection of the connector by the sleeve-type locking member 3 greatly reduces the failure or even burning of the connector due to water vapor infiltration in high temperature and high humidity environments.

[0039] In addition, the photovoltaic connector has a relatively simple structure and low cost, and can meet higher sealing performance requirements, with good economy and practicality.

[0040] It should be noted that the present invention does not specifically limit how to achieve the plug-in connection between the positive connector 1 and the negative connector 2. It can be designed and selected by those skilled in the art according to actual conditions, and all of these fall within the scope of protection of the present invention. As in the present embodiment, the negative connector 2 is provided with a socket 20, and the positive connector 1 is provided with an elastic clamping claw 10 and a plug-in portion 11 that cooperate with the socket 20. The elastic clamping claw 10 and the plug-in portion 11 on the positive connector 1 are inserted into the socket 20 of the negative connector 2 to achieve a plug-in connection between the two. The precise cooperation between the plug-in portion 11 and the socket 20 helps to achieve accurate alignment and insertion, reduces the difficulty of installation, and improves installation efficiency. At the same time, through the cooperation between the elastic clamping claw 10 and the socket 20, a certain clamping force and contact stability can be provided to ensure that the connection between the positive connector 1 and the negative connector 2 is not easy to loosen during use, thereby ensuring the stability and reliability of current transmission.

[0041] Similarly, there is no limitation on the specific structural composition of the positive connector 1 and the negative connector 2. For example, in this embodiment, the positive connector 1 and the negative connector 2 both include a connector body and a nut 5. The nut 5 is sleeved on the non-docking end of the connector body and threadedly connected to it, etc., which will not be repeated here.

[0042] Furthermore, a first anti-slip groove 30 is provided on the outer wall surface of the sleeve-type locking piece 3. The design of the anti-slip groove can greatly increase the friction of the outer wall surface of the sleeve-type locking piece 3, so that the operator can hold the sleeve-type locking piece 3 more firmly when rotating it, effectively avoiding hand slipping, thereby being able to more easily and accurately control the tightening or loosening force and angle, ensuring the smooth progress of the installation and disassembly process.

[0043] Secondly, even if your hands are stained with oil or water or are in a harsh operating environment, the anti-slip pattern can still provide reliable anti-slip performance, improving the safety and stability of operation.

[0044] In addition, a good anti-slip design can reduce the labor intensity of operators, improve work efficiency, and reduce problems such as connector damage or loose connections caused by improper operation, thereby extending the service life of photovoltaic connectors and ensuring the stable operation of the photovoltaic system.

[0045] Specifically, the present invention does not limit the specific structure of the first anti-slip pattern 30, as long as it can play an anti-slip function. For example, in this embodiment, the first anti-slip pattern 30 is a plurality of mutually parallel strip-shaped protrusions 31 or strip-shaped grooves, which are arranged at intervals along the circumferential direction of the outer wall of the sleeve-type locking member 3; the strip-shaped protrusions 31 or strip-shaped grooves can be arranged along the axial direction of the sleeve-type locking member 3, or form a certain angle with the axial direction of the sleeve-type locking member 3.

[0046] Furthermore, at the trailing end of the external thread of the positive connector 1, a plurality of first stop protrusions 12 are provided at intervals along the circumference of the outer wall thereof, for forming a stop connection with the end face of the positive connector connection end of the sleeve-type locking member 3. Alternatively, a second stop protrusion (not shown) is provided at the trailing end of the external thread of the negative connector 2, for forming a stop connection with the end face of the negative connector connection end of the sleeve-type locking member 3.

[0047] Through the abutting connection between the first limiting protrusion 12 and the sleeve-type locking member 3, precise positioning between the positive connector 1 and the sleeve-type locking member 3 can be achieved, ensuring that the two are in the correct relative position when connected. The first limiting protrusion 12 can effectively limit the relative movement between the positive connector 1 and the sleeve-type locking member 3, reducing the loose connection caused by factors such as vibration and impact, thereby enhancing the reliability of the connection. At the same time, the first limiting protrusion 12 can also play a limiting role, avoiding over-tightening of the sleeve-type locking member 3, preventing damage to the connector or affecting its performance. In addition, during the assembly process, the operator can quickly determine whether the connection has reached the appropriate position through the first limiting protrusion 12, thereby improving the efficiency and accuracy of the assembly. Similarly, the role of the second limiting protrusion is similar to that of the first limiting protrusion 12, and will not be repeated here.

[0048] Specifically, the present invention does not limit the specific shapes of the first limiting protrusion 12 and the second limiting protrusion. For example, in this embodiment, the first limiting protrusion 12 and the second limiting protrusion are conical, and three are provided. The three first limiting protrusions 12 and the second limiting protrusions are evenly distributed along the circumference of the outer wall surface of the positive connector 1 or the negative connector 2. Of course, the first limiting protrusion 12 and the second limiting protrusion can also be an annular integrated structure, provided on the outer wall surface of the positive connector 1 or the negative connector 2, to enhance the overall structural strength of the limiting protrusions and make them less likely to deform or be damaged during use.

[0049] At the same time, the side of the first limiting protrusion 12 opposite to the end face of the positive connector connection end of the sleeve-type locking member 3 is a plane, thereby realizing a planar abutment connection between the sleeve-type locking member 3 and the first limiting protrusion 12. The side of the second limiting protrusion opposite to the end face of the negative connector connection end of the sleeve-type locking member 3 is also a plane. The design of the planar contact method can provide a larger and more stable contact area, which helps to improve the sealing performance to a certain extent and makes the abutment between the first limiting protrusion 12, the second limiting protrusion and the sleeve-type locking member 3 more reliable and stable. The planar contact also helps to distribute the pressure generated during the abutment more evenly on the contact surface, reducing deformation or damage caused by excessive local pressure. In addition, the first limiting protrusion 12 and the second limiting protrusion are away from one end of the sleeve-type locking member 3 and are inclined toward the side away from the sleeve-type locking member 3.

[0050] Furthermore, a first sealing ring 13 is sleeved on the tail end of the external thread of the positive connector 1 and is located on the side of the first limiting protrusion 12 close to the sleeve-type locking member 3. During operation, the positive connector connection end of the sleeve-type locking member 3 squeezes the first sealing ring 13 to achieve a sealed connection between the sleeve-type locking member 3 and the positive connector 1. The first sealing ring 13 is squeezed by the positive connector connection end of the sleeve-type locking member 3 and can fill the tiny gap between the positive connector 1 and the sleeve-type locking member 3, effectively preventing liquid or gas from penetrating, improving the sealing reliability of the connection part, thereby reducing corrosion and damage to the connector and extending its service life. At the same time, the elastic deformation of the sealing ring can provide a certain pre-tightening force, making the connection between the positive connector 1 and the sleeve-type locking member 3 tighter and reducing the possibility of loosening. It should be noted that the present invention does not specifically limit the material and shape of the first sealing ring 13, and it can be selected by technical personnel in this field according to actual conditions. For example, in this embodiment, the first sealing ring 13 is an O-ring made of rubber material. The rubber material has good heat aging resistance, low temperature resistance, chemical medium resistance, water resistance and elasticity, which can ensure that the sealing ring has a long service life in various environments.

[0051] Similarly, a third sealing ring 24 can be sleeved on the tail end of the external thread of the negative connector 2. During operation, the negative connector connection end of the sleeve-type locking member 3 squeezes the third sealing ring 24 to achieve a sealed connection between the sleeve-type locking member 3 and the negative connector 2. The third sealing ring 24 is squeezed by the negative connector connection end of the sleeve-type locking member 3 and can fill the tiny gap between the negative connector 2 and the sleeve-type locking member 3, effectively preventing liquid or gas from penetrating, improving the sealing reliability of the connection part, thereby reducing corrosion and damage to the connector and extending its service life. At the same time, the elastic deformation of the sealing ring can provide a certain pre-tightening force, making the connection between the negative connector 2 and the sleeve-type locking member 3 tighter and reducing the possibility of loosening. The third sealing ring 24 can be designed and selected with reference to the first sealing ring 13, and will not be described here.

[0052] Furthermore, the external thread of the negative connector 2 is divided into a first thread segment 21 and a second thread segment 22, which are arranged in sequence. A mounting groove 23 is formed between the first and second thread segments 21, 22. The mounting groove 23 is used to mount a second sealing ring (not shown). By providing the mounting groove 23 between the first and second thread segments 21, 22, the second sealing ring is mounted. When the sleeve-type locking member is fitted over the external thread of the negative connector 2, it squeezes the second sealing ring and deforms it. The deformed second sealing ring can better fill the small gap between the negative connector 2 and the sleeve-type locking member 3, effectively preventing liquid or gas from infiltrating, improving the sealing reliability of the connection, thereby reducing corrosion and damage to the connector and extending its service life. At the same time, the elastic deformation of the sealing ring can provide a certain preload force, making the connection between the negative connector 2 and the sleeve-type locking member 3 tighter, reducing loosening caused by vibration or other external forces, and ensuring the stability of the connection. It should be noted that the location and size of the mounting groove 23 are not limited in the present invention and can be designed by those skilled in the art based on actual conditions.

[0053] Furthermore, the negative connector 2 is provided with a locking nut 4. After the ends of the sleeve-type locking member 3 are connected to the positive connector 1 and the negative connector 2, the locking nut 4 is rotated until it abuts against the end surface of the sleeve-type locking member 3 at the negative connector connection end. Rotating the locking nut 4 until it abuts against the end surface of the sleeve-type locking member 3 provides additional tightening force, further enhancing the connection stability between the positive connector 1, the negative connector 2, and the sleeve-type locking member 3, and preventing the connection from loosening due to factors such as vibration and impact during use. At the same time, by properly tightening the locking nut 4, the pressure on the sleeve-type locking member 3 can be increased, thereby further improving the sealing performance. The specific shape, structure, and material of the locking nut 4 are not limited and can be selected by those skilled in the art based on actual circumstances. For example, in this embodiment, a second anti-slip groove 40 is provided on the outer wall of the locking nut 4. The specific structure of the second anti-slip groove 40 can be designed with reference to the first anti-slip groove 30 and will not be further described here.

[0054] Furthermore, the butt joints between the positive and negative connectors 1 and 2 are also provided with water-blocking tape (not shown). Water-blocking tape is typically made of a material with excellent waterproof properties, such as a polymer with low water absorption and high water resistance. Providing water-blocking tape at the butt joints between the positive and negative connectors 1 and 2 significantly improves the reliability, safety, durability, and sealing of the connectors.

[0055] Based on the above-mentioned photovoltaic connector, the present invention also provides a photovoltaic junction box, including the above-mentioned photovoltaic connector. The photovoltaic junction box includes all technical solutions of the photovoltaic connector and has at least all the advantages of the above-mentioned photovoltaic connector, which will not be repeated here.

[0056] Based on the above photovoltaic junction box, the present invention further provides a photovoltaic assembly, including the above photovoltaic junction box. The photovoltaic assembly includes all technical solutions of the photovoltaic junction box and has at least all the advantages of the above photovoltaic junction box, which will not be repeated here.

[0057] The above further describes the present invention with the help of specific embodiments, but it should be understood that the specific description here should not be construed as limiting the essence and scope of the present invention. Various modifications made to the above embodiments by ordinary technicians in this field after reading this specification are all within the scope of protection of the present invention.

Claims

1. A photovoltaic connector, characterized in that: It includes a positive connector, a negative connector plug-connected to the positive connector, and a sleeve-type locking piece; Wherein, the butt ends of the positive connector and the negative connector are both provided with external threads; The two ends of the sleeve-type locking member are respectively sleeved on the butt ends of the positive connector and the negative connector and are respectively threadedly connected thereto.

2. The photovoltaic connector according to claim 1, wherein: A first limiting protrusion is provided at the tail end of the external thread of the positive connector, for forming a stop connection with the end face of the positive connector connection end of the sleeve-type locking member; Or the tail end of the negative connector external thread is provided with a second limiting protrusion for forming a stop connection with the end face of the negative connector connection end of the sleeve-type locking member.

3. The photovoltaic connector according to claim 2, wherein: The first limiting protrusion and the second limiting protrusion are respectively arranged at intervals along the circumference of the outer wall surface of the positive connector or the negative connector.

4. The photovoltaic connector according to claim 2, wherein: The first limiting protrusion has a plane surface opposite to the end surface of the positive connector connection end of the sleeve-type locking member; Or the surface of the second limiting protrusion opposite to the end surface of the negative connector connection end of the sleeve-type locking member is a plane.

5. The photovoltaic connector according to any one of claims 1 to 4, characterized in that: A first sealing ring is sleeved on the tail end of the external thread of the positive connector, and the positive connector connection end of the sleeve-type locking member squeezes the first sealing ring to achieve a sealed connection between the sleeve-type locking member and the positive connector; And / or, a third sealing ring is sleeved on the tail end of the external thread of the negative connector, and the negative connector connecting end of the sleeve-type locking piece squeezes the third sealing ring to achieve a sealed connection between the sleeve-type locking piece and the negative connector.

6. The photovoltaic connector according to claim 1, wherein: The external thread of the negative electrode connector is divided into a first thread segment and a second thread segment which are arranged in sequence. A mounting groove is formed between the first thread segment and the second thread segment, and a second sealing ring is mounted in the mounting groove.

7. The photovoltaic connector according to claim 1, wherein: The negative connector is also provided with a locking nut. After the two ends of the sleeve-type locking piece are connected to the positive connector and the negative connector, the locking nut is stopped at the end surface of the negative connector connection end of the sleeve-type locking piece.

8. The photovoltaic connector according to claim 1, wherein: The outer wall surface of the sleeve type locking member is provided with a first anti-slip pattern.

9. A photovoltaic junction box, characterized in that: The photovoltaic connector comprises the photovoltaic connector according to any one of claims 1 to 8.

10. A photovoltaic module, characterized in that: The photovoltaic junction box according to claim 9 is included.

Images