Waterproof photovoltaic connector, and photovoltaic junction box and photovoltaic module using same

Abstract

The utility model discloses a waterproof photovoltaic connector, and a photovoltaic junction box and a photovoltaic assembly using the same, the photovoltaic connector comprises a cathode connector and an anode connector, and the cathode connector and the anode connector are connected with the photovoltaic junction box through photovoltaic cables; one end of the photovoltaic cable is connected with the photovoltaic junction box in an ultrasonic welding mode, and the other end of the photovoltaic cable is connected with the negative electrode connector or the positive electrode connector into a whole in an ultrasonic welding mode. According to the waterproof design of the photovoltaic module junction box connector, the waterproof performance, the anti-creeping performance and the corrosion resistance of the junction box connector can be improved, the photovoltaic module junction box connector has the advantages of being integrated, free of maintenance, durable, high in expandability, convenient and fast to install and the like, the photovoltaic module cannot be damaged, the original use function of the junction box cannot be changed, and the service life of the junction box connector is prolonged. The method has high practical application value.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic junction boxes, in particular to a waterproof photovoltaic connector, a photovoltaic junction box and a photovoltaic module using the same. Background Art

[0002] Solar energy is clean, pollution-free and energy-saving, and is widely used in various fields. Through solar panels, solar energy can be directly used on solar devices. In addition to photovoltaic cell components for photovoltaic power generation, photovoltaic connectors for realizing power transmission are also required on the photovoltaic cell components. Currently, the main photovoltaic connectors are cable connectors, which are installed on the positive and negative lead-out cables of photovoltaic cell components and are mainly used to connect between photovoltaic cell components to achieve power transmission.

[0003] Since photovoltaic connectors are used in harsh outdoor environments for a long time, usually for more than ten years, high requirements are placed on the reliability and safety of connector products. However, existing photovoltaic connectors are prone to corrosion and damage. As Figure 1 shown, in order to achieve a good sealing effect after the cable is inserted into the tail of the connector for the traditional photovoltaic junction box connector, its tail structure is designed with: a thread (injection molding material is PC), a nut (injection molding material is PA66), a flower basket (injection molding material is PC), and an inner plug (material is silica gel). The structure is relatively complex, but the sealing effect is excellent. For example, the structure of the traditional photovoltaic junction box connector includes: positive and negative pole structural parts, an inner wire ring, a retaining ring, a flower basket, an inner plug, a nut and other structures. The whole structure has multiple components, all of which need to be assembled manually, which is relatively cumbersome. Moreover, due to individual differences during the manual assembly process, there are some subtle differences after the assembly of each connector is completed.

[0004] Chinese Patent with publication number CN 102904373 A discloses a waterproof device for a cable junction box. The sleeve and the cable junction box are sealed and connected through a rubber ring. The number of through holes on the rubber ring is equal to the number of cable core wires. The rubber ring squeezes the cable core wires to achieve waterproofing at the cable core wires. However, the size of the through holes on the rubber ring needs to be the same as the size of the cable core wires. At the same time, the installation steps are relatively complex and require manual installation, which is time-consuming and laborious.

[0005] In view of this, the present application aims to develop a photovoltaic connector that is convenient to operate and can ensure the performance of the waterproofness, anti-electric leakage and anti-corrosion of the junction box connector. Summary of the Utility Model

[0006] The technical problem to be solved by the present application is that the structure of the conventional photovoltaic junction box connector has multiple components, all of which need to be assembled manually, which is relatively cumbersome, and due to errors, its sealing and waterproof effect cannot be guaranteed.

[0007] To solve the above technical problems, on the one hand, the present application provides a waterproof photovoltaic connector, including: a connector including a negative connector and a positive connector, both the negative connector and the positive connector are connected to a photovoltaic junction box through photovoltaic cable lines; wherein, one end of the photovoltaic cable line is connected to the photovoltaic junction box by ultrasonic welding, and the other end is also connected to the negative connector or the positive connector as a whole by ultrasonic welding.

[0008] According to an embodiment of the present application, the photovoltaic cable line is also fixedly connected to the negative connector or the positive connector through a pressing block.

[0009] According to an embodiment of the present application, the middle part of the pressing block is for the photovoltaic cable line to be embedded, and the pressing block is matched with the front end of the negative connector or the positive connector for ultrasonic welding.

[0010] According to an embodiment of the present application, an O-ring seal is provided between the positive connector and its connecting device.

[0011] According to an embodiment of the present application, the photovoltaic junction box includes a base and an upper cover, and the base and the upper cover are connected by a buckle.

[0012] According to an embodiment of the present application, the positive connector includes a negative plug rod, which is a connector injection-molded from PC material.

[0013] According to an embodiment of the present application, the negative connector includes a positive socket, which is a connector injection-molded from PC material.

[0014] On the other hand, the present application discloses a photovoltaic junction box, including a photovoltaic cable line led out, and the photovoltaic cable line is installed with the photovoltaic junction box connector as described above.

[0015] On still another aspect, the present application discloses a photovoltaic module, including a photovoltaic cell panel and a photovoltaic junction box installed on the photovoltaic cell panel, and the photovoltaic junction box includes the photovoltaic junction box connector as described above.

[0016] Compared with the prior art, the technical solution of the present application has the following beneficial effects:

[0017] This utility model patent designs from the connection part between the connector and the cable. Through ultrasonic welding, the cable and the connector are integrated into one structure, replacing components such as connector nuts, connector eyebolts, and T-shaped sealing rings. The cable and the positive / negative connectors are directly ultrasonically welded through the pressing block to achieve an integrated design, preventing moisture from entering the connector interior from the source, and realizing waterproof, anti-electric leakage, anti-corrosion, and durable performance:

[0018] 1. Waterproofness: The integrated structure of the connector and the cable effectively prevents moisture from entering the connector from the nut.

[0019] 2. Anti-electric leakage: There is no gap between the cable and the connector, and the positive plug barrel and the negative plug rod are not eroded by water vapor;

[0020] 3. Anti-corrosion: The integrated connector structure avoids the corrosion of nuts and ensures the normal operation of the junction box;

[0021] 4. Durable: The ultrasonic welding method used for the connector and the cable is the same as that for the junction box body and the cable, which can meet the requirements of long-term use. Description of the Drawings

[0022] To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present application and do not limit the present application.

[0023] Figure 1 It is a schematic diagram of a conventional junction box connector;

[0024] Figure 2 It is a schematic diagram of a waterproof photovoltaic connector according to an example of the present utility model and a photovoltaic junction box using the same;

[0025] Figure 3 It is a schematic diagram of the split of the photovoltaic connector according to an example of the present utility model.

[0026] The description of the reference numerals is as follows:

[0027] 1. Photovoltaic junction box, 3. Photovoltaic cable, 5. Negative connector, 6. Positive connector, 41. Nut, 402. Pressure block, 405. O-ring. Detailed Embodiments

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0029] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings understood by those of ordinary skill in the art to which the present application belongs. The "first", "second", and similar terms used in the description and claims of the present patent application do not denote any order, quantity, or importance, but are only used to distinguish different components. Similarly, the terms such as "a" or "one" do not denote a quantity limitation, but mean that there is at least one.

[0030] Such asFigure 2 , Figure 3 As shown, a waterproof photovoltaic connector according to an example of the present utility model includes a negative connector 5 and a positive connector 6. Both the negative connector 5 and the positive connector 6 are connected to a photovoltaic junction box 1 through a photovoltaic cable 3. One end of the photovoltaic cable 3 is connected to the photovoltaic junction box 1 by ultrasonic welding, and the other end is also connected to the negative connector 5 or the positive connector 6 by ultrasonic welding to form an integrated design of the junction box body and the cable, and an integrated design of the connector and the cable. This application designs from the connection part between the connector and the cable, and through ultrasonic welding, the cable and the connector are integrated into one structure, replacing parts such as the connector nut 41, the connector eyebolt, and the T-shaped sealing ring. The cable is directly ultrasonically welded to the positive / negative connector 5 through the pressing block 402 to achieve an integrated design, preventing water vapor from entering the connector interior from the source, realizing water resistance, anti-electric leakage, anti-corrosion, and durability, and avoiding complicated manual operations.

[0031] In this embodiment, the connector includes a negative connector 5 and a positive connector 6. Both the negative connector 5 and the positive connector 6 are connected to the photovoltaic junction box 1 through a photovoltaic cable 3;

[0032] Furthermore, the photovoltaic cable 3 is also fixedly connected to the negative connector 5 or the positive connector 6 through the pressing block 402.

[0033] Furthermore, the middle part of the pressing block 402 is for the photovoltaic cable 3 to be embedded, and the pressing block 402 is matched with the front end of the negative connector 5 or the positive connector 6 for ultrasonic welding. The nut 41 of the conventional junction box connector is integrally designed, the connector and the cable are ultrasonically welded, which is the same as the connection method of the junction box body and the cable, minimizing the entry of water vapor into the connector, ensuring that the positive plug cylinder and the negative plug rod are protected from water vapor erosion, and preventing electric leakage. Figure 1

[0034] Furthermore, as shown in the figure, the front end of the positive connector 6 is ultrasonically welded to the cable through the pressing block 402, and there is an O-ring 405 on the rear positive plug cylinder for convenient sealed connection with the connected device; the front end of the negative connector 5 is ultrasonically welded to the cable through the pressing block 402.

[0035] Furthermore, the photovoltaic junction box 1 includes a base and an upper cover, and the base and the upper cover are connected by a buckle.

[0036] Furthermore, the positive connector 6 includes a negative plug rod, which is a connector injection-molded with PC material; the negative connector 5 includes a positive plug cylinder, which is a connector injection-molded with PC material.

[0037] ​On the other hand, the present application discloses a photovoltaic junction box, which includes a photovoltaic cable 3 led out, and the photovoltaic cable 3 is equipped with the above-mentioned photovoltaic junction box connector.

[0038] In still another aspect of the present application, a photovoltaic module is disclosed, which includes a photovoltaic panel and a photovoltaic junction box 1 installed on the photovoltaic panel, and the photovoltaic junction box 1 includes the above-mentioned photovoltaic junction box connector.

[0039] In summary, the photovoltaic connector of the present utility model is designed at the connection between the connector head and the cable. Through ultrasonic welding, the cable and the connector are integrated into one structure, replacing components such as the connector nut 41, the connector eyebolt, and the T-shaped sealing ring. The cable is directly ultrasonically welded to the positive / negative connectors through the pressing block 402 to achieve an integrated design, preventing moisture from entering the connector interior from the source, and realizing waterproof, anti-electric leakage, anti-corrosion, and durable performance:

[0040] 1. Waterproofness: The integrated structure of the connector and the cable effectively prevents moisture from entering the connector through the nut.

[0041] 2. Anti-electric leakage: There is no gap between the cable and the connector, and the positive plug barrel and the negative plug rod are not eroded by moisture.

[0042] 3. Anti-corrosion: The integrated connector structure avoids corrosion of the nut and ensures the normal operation of the junction box.

[0043] 4. Durability: The ultrasonic welding method used for the connector and the cable is the same as that for the welding of the junction box body and the cable, which can meet the requirements of long-term use.

[0044] The present application ensures the connection stability of the photovoltaic connector during power transmission. Further, the photovoltaic junction box 1 and the photovoltaic module made of the photovoltaic connector of the present utility model have high use stability and use safety.

[0045] The above is only an exemplary implementation manner of the present application, rather than being used to limit the protection scope of the present application. The protection scope of the present application is determined by the appended claims.

Claims

1. A waterproof photovoltaic connector, characterized in that: include: Connectors, including a negative connector and a positive connector, wherein the negative connector and the positive connector are both connected to a photovoltaic junction box through a photovoltaic cable; Among them, one end of the photovoltaic cable is connected to the photovoltaic junction box by ultrasonic welding, and the other end is also connected to the negative connector or the positive connector by ultrasonic welding.

2. A waterproof photovoltaic connector according to claim 1, characterized in that: The photovoltaic cable is also fixedly connected to the negative connector or the positive connector via a wire pressing block.

3. A waterproof photovoltaic connector according to claim 2, characterized in that: The photovoltaic cable is embedded in the middle of the wire pressing block, and the wire pressing block is matched with the front end of the negative connector or the positive connector for ultrasonic welding.

4. A waterproof photovoltaic connector according to claim 1, characterized in that: An O-type sealing ring is provided between the positive electrode connector and the connecting device.

5. The waterproof photovoltaic connector according to claim 1, characterized in that: The photovoltaic junction box comprises a base and an upper cover, and the base and the upper cover are connected by a snap buckle.

6. A waterproof photovoltaic connector according to claim 1, characterized in that: The positive electrode connector includes a negative electrode plug rod and is a connector made of injection molding of PC material.

7. The waterproof photovoltaic connector according to claim 1, characterized in that: The negative electrode connector includes a positive electrode plug-in and is a connector made of injection molding of PC material.

8. A photovoltaic junction box, including a photovoltaic cable lead, characterized in that: The photovoltaic cable is installed with the photovoltaic junction box connector according to any one of claims 1 to 7.

9. A photovoltaic assembly, comprising a photovoltaic panel and a photovoltaic junction box mounted on the photovoltaic panel, characterized in that: The photovoltaic junction box comprises the photovoltaic junction box connector according to any one of claims 1 to 7.

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