A winding joint anti-warping structure of a junction box

Abstract

The application discloses a kind of anti-warping structures of junction box winding joint, belong to photovoltaic junction box structure design field.The length direction of junction box base is provided with connector fixing device, specifically can adopt the structure of dustproof plug cooperation sealing ring, cable is wound into annular after connector is directly inserted on the dustproof plug of junction box base, and the sealing ring on the dustproof plug interferes with the inner wall of connector, so that junction box base, cable, connector are combined to form a whole, the length of junction box base is close to the length of connector, which is beneficial to balance the weight of cable, overcome the swing of cable, and the junction box is relatively flat when installing on backboard, and is not easy to warp.The half-moon structure of cable forms locking effect on junction box base and connector.When opening, slight pulling force is applied at the end of the connector to pull out the connector, which is convenient for customers to install.When the cable is longer, several sections are folded in the middle and tied with a tie, which is more efficient than the conventional way and saves the tie.

Description

Technical Field

[0001] This invention belongs to the field of photovoltaic junction box structure design, specifically relating to a junction box winding connector anti-warping structure. Background Technology

[0002] With technological advancements and cost considerations, the demand for miniaturization in junction boxes has become increasingly stringent. Current trends in junction box miniaturization necessitate small size and compact components in photovoltaic (PV) junction boxes. A significant challenge with these small PV junction boxes lies in their welding to the PV backsheet. Due to their small size and light weight, the welding area between the junction box and the backsheet is limited, and the movement of the connected cables exerts a considerable force, easily causing warping. When applying adhesive to a warped junction box, it becomes difficult to fill completely and easily overflows. These issues make miniaturization of the junction box challenging. To ensure warp-free installation, cable winding and bundling should be as flat and uniform as possible. However, the elasticity and stiffness of cables of different lengths vary under different operating temperatures, resulting in complex and costly winding processes. Summary of the Invention

[0003] The present invention aims to provide a warping prevention structure for junction box winding connectors, which is an integrated component including junction box, cable, and connector. The purpose is to solve the warping problem during welding of small photovoltaic junction boxes mentioned in the background art, and at the same time facilitate wire bundling and cable management. It is mainly used for the storage, transportation and installation of small junction boxes.

[0004] To achieve the above-mentioned technical objectives, the technical solution of the present invention is as follows:

[0005] A warping prevention structure for a junction box winding connector includes:

[0006] The junction box base is narrow and long, with a cable outlet on one side along its length and a connector fixing device on the other side along its length.

[0007] One end of the cable is connected to the conductive component inside the junction box base via a cable exit device, and the other end is connected to the connector.

[0008] The connector has one end connected to the cable and the other end fixed to the connector fixing device on the junction box base, with its length direction consistent with the length direction of the junction box base.

[0009] Furthermore, the connector fixing device is a dust plug, and a sealing ring is provided at the tail of the dust plug. The connector is inserted into the dust plug, and the sealing ring interferes with the inner wall of the connector.

[0010] Furthermore, the sealing ring is tightly fitted to the inner wall of the connector.

[0011] Furthermore, the dust plug includes a guide post, which is clearance-fitted with the inner wall of the connector.

[0012] Furthermore, the junction box base, cable, and connector form a closed near-ring structure.

[0013] Furthermore, the cable is folded back several times in the middle and then secured with cable ties.

[0014] Furthermore, the junction box base mates with the junction box cover. A diode and a conductive component are installed inside the junction box base. A busbar is welded onto the conductive component. The busbar extends from the photovoltaic module and is inserted into the junction box before being welded. After the busbar is connected, the junction box is filled with potting compound to form a seal.

[0015] Furthermore, the length of the junction box base is close to the length of the connector, with a ratio ranging from 0.7 to 1.3, wherein the junction box base does not include a connector fixing device.

[0016] Due to the adoption of the above technical solution, the beneficial technical effects of the present invention are as follows:

[0017] The junction box base of this invention has a connector fixing device on one side along its length. For example, a conventional snap-fit ​​device can be used, but a preferred solution is a dust plug that mates with the connector. The dust plug has a sealing ring at its tail. After the cable is wound into an arc, the connector is directly inserted into the dust plug of the junction box base. The sealing ring on the dust plug interferes with the inner wall of the connector. This structure allows the junction box base, cable, connector, and connector fixing device to form a closed whole, creating a semi-circular ring structure. Because the length of the junction box base is close to the length of the connector, it helps to balance the weight of the cable, overcoming cable sway. The junction box and connector are more evenly mounted on the backplate, reducing the likelihood of warping. Furthermore, the invention uses a sealing ring to fix the connector. During fixing, the sealing ring fits tightly with the inner wall of the connector, while the guide post of the dust plug forms a gap fit with the inner wall of the connector, resulting in minimal sway. The arc-shaped structure of the cable also provides a locking effect on the junction box base and connector. This invention eliminates the need for cable ties when securing shorter cables, improving efficiency and saving costs. The connector can be easily opened by applying slight tension at the connector end, facilitating customer installation. For longer cables, several sections are folded back in the middle and secured with cable ties before the connector is inserted into the dust plug on the junction box base. This winding method is more efficient than conventional methods, saves cable ties, and is very convenient for transportation and storage.

[0018] The advantages of the present invention will be set forth in the following detailed description, and in some respects will become apparent from the description or may be learned by practice of the invention. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the connector of the present invention when it is not connected to the junction box base.

[0020] Figure 2 This is a schematic diagram of the connector of the present invention when it is inserted into the junction box base.

[0021] Figure 3 This is a schematic diagram of the structure of the present invention where the cable is folded back in the middle and secured with cable ties when it is long.

[0022] Explanation of reference numerals in the attached diagram: 1—junction box base, 2—cable, 3—connector, 4—dust plug, 5—sealing ring, 6—cable tie. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] See Figures 1 to 3 The present invention is an embodiment of a junction box winding connector anti-warping structure, including a junction box base 1, a cable 2, a connector 3, a dust plug 4, a sealing ring 5, and an optional cable tie 6.

[0025] like Figure 1 and Figure 2 As shown, the junction box base 1 is narrow and elongated. A cable outlet is located on one side of the junction box base 1 along its length, and a connector fixing device, specifically a dust plug 4, is located on the other side along its length. A sealing ring 5 is located at the tail of the dust plug 4. One end of the cable 2 is connected to a conductive component inside the junction box base 1 via the cable outlet, and the other end is connected to a connector 3. The length of the connector 3 is close to the length of the junction box base 1. One end of the connector 3 is connected to the cable 2, and the other end is inserted into the dust plug 4 on the junction box base 1. Simultaneously, the inner wall of the connector 3 interferes with the sealing ring 5 on the dust plug 4, thereby fixing the connector 3 to one side of the junction box base 1. The sealing ring 5 fits tightly with the inner wall of the connector 3, and the guide post of the dust plug 4 has a clearance fit with the inner wall of the connector 3. The dust plug 4 and the sealing ring 5 not only fix the connector 3 but also prevent dirt and sand from entering the connector 3.

[0026] like Figure 2As shown, after cable 2 is wound into a loop, connector 3 is directly inserted into the dust plug 4 of the junction box base 1. When cable 2 is short, there is no need to use cable ties to secure it, which improves efficiency and saves costs. When opening, a slight pull is applied to the end of connector 3 to pull it off, making it convenient for customers to install.

[0027] like Figure 3 As shown, when the cable 2 is long, it is folded back several times in the middle and tied tightly with cable ties 6. The connector 3 is then inserted into the dust plug 4 on the junction box base 1. This winding method is more efficient than the conventional method and also saves cable ties.

[0028] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A warping prevention structure for a junction box winding connector, characterized in that, include: The junction box base is narrow and long, with a cable outlet on one side along its length and a connector fixing device on the other side along its length. One end of the cable is connected to the conductive component inside the junction box base via a cable exit device, and the other end is connected to the connector. The connector has one end connected to the cable and the other end fixed to the connector fixing device on the junction box base, with its length direction consistent with the length direction of the junction box base. The connector fixing device is a dust plug, and a sealing ring is provided at the tail of the dust plug. The connector is inserted into the dust plug, and the sealing ring interferes with the inner wall of the connector. The sealing ring fits tightly against the inner wall of the connector; The dust plug includes a guide post, which is clearance-fitted with the inner wall of the connector; The length of the junction box base is close to the length of the connector, with a ratio ranging from 0.7 to 1.3, wherein the junction box base does not include a connector fixing device.

2. The anti-warping structure for a junction box winding connector according to claim 1, characterized in that, The junction box base, cables, and connectors form a closed, near-ring structure.

3. The anti-warping structure for a junction box winding connector according to claim 2, characterized in that, The cable is folded back several times in the middle and then secured with cable ties.

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