Cable connection device and photovoltaic power semiconductor junction box

Abstract

The utility model discloses a cable connecting device, including first casing, cable and the first electric conductor in the first casing, the first electric conductor's first end is electrically connected with cable, the second end of first electric conductor is used for with the photovoltaic power semiconductor module electric connection in external terminal box, one end of first casing is first connecting end, and the first connecting end is used for with external terminal box rotary connection. In this structure, the flexible connection of cable and terminal box on multiple angles can be realized through the setting of cable connecting device, thereby effectively avoid the problem that a plurality of specifications terminal boxes need to be made or the cable length is greatly increased because of the unfixed position of external equipment, reduce the cost and improve the reliability of system.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic junction boxes, and in particular to a cable connection device and a photovoltaic power semiconductor junction box. Background Technology

[0002] Photovoltaic power semiconductor modules are a crucial component of photovoltaic (PV) modules, primarily used to improve the reliability and efficiency of PV systems. When a cell in a PV string experiences current mismatch due to shading, damage, or performance degradation, the photovoltaic power semiconductor module provides a low-resistance bypass path for that cell, allowing current to flow around the faulty cell, thereby reducing hot spot effects and maintaining the overall power generation efficiency of the PV module. A photovoltaic power semiconductor module consists of diodes and conductors electrically connected to the diodes.

[0003] Currently, photovoltaic power semiconductor modules are mostly installed inside junction boxes. The photovoltaic power semiconductor modules are connected to external equipment such as inverters via cables. The cables are fixed to the junction box with clips, and the angle of the cables is fixed, so electrical connection can only be achieved with the photovoltaic power semiconductor modules inside the junction box from one of the directions of the junction box.

[0004] Then, since the location of external equipment such as inverters is not fixed, external equipment may be located anywhere on the solar panel, that is, anywhere on the junction box. In this case, it is necessary to make junction boxes of various specifications or greatly increase the length of the cables, otherwise the cables will be damaged and the operation of the solar panel will be affected. Utility Model Content

[0005] The technical problem solved by this utility model is to provide a cable connection device that facilitates the connection of cables to junction boxes at various angles.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a cable connection device, including a first housing, a cable and a first conductor located in the first housing, a first end of the first conductor being electrically connected to the cable, a second end of the first conductor being used to be electrically connected to a photovoltaic power semiconductor module in an external junction box, and one end of the first housing being a first connection end, which is used to be rotatably connected to the external junction box.

[0007] Furthermore, the second end of the first conductor is cylindrical, and the first connection end is cylindrical.

[0008] Furthermore, the surface of the first connecting end is provided with a first locking device for axial positioning.

[0009] This utility model also discloses a photovoltaic power semiconductor junction box, including the cable connection device described above, and a junction box body. A photovoltaic power semiconductor module is disposed inside the junction box body. An extension is provided on one side of the junction box body. The end of the extension away from the junction box body is a second connection end. The first connection end and the second connection end are inserted and rotated together. When the first connection end and the second connection end are inserted and connected, the first conductor and the photovoltaic power semiconductor module are electrically connected.

[0010] Furthermore, the junction box body includes a second housing, and the photovoltaic power semiconductor module is disposed within the second housing;

[0011] The extension includes a third housing, and a second conductor is disposed inside the third housing. The two ends of the second conductor are a third end and a fourth end, respectively. The third end of the second conductor is connected to the photovoltaic power semiconductor module. When the first connection end and the second connection end are plugged into each other, the fourth end of the second conductor is electrically connected to the second end of the first conductor.

[0012] Furthermore, the fourth end of the second conductor is cylindrical, and the fourth end of the second conductor is inserted and rotated to connect with the second end of the first conductor.

[0013] Furthermore, the fourth end of the second conductor and the second end of the first conductor are a mating pin and socket structure.

[0014] Furthermore, the second connecting end of the third housing is provided with a second locking device that cooperates with the first locking device for axial locking.

[0015] Furthermore, the first locking device is a groove provided at the first connecting end of the first housing, the groove being arranged circumferentially around the third housing, and the second locking device includes a locking ring circumferentially arranged at the second connecting end of the third housing, the inner side of the locking ring being provided with a protrusion, when the first locking device and the second locking device are inserted and connected, the protrusion extends into the groove and can rotate around the groove circumferentially.

[0016] The beneficial effects of this utility model are:

[0017] 1. The cable connection device in this structure allows for flexible connection of cables and junction boxes at multiple angles, effectively avoiding the need to manufacture junction boxes of various specifications or significantly increase cable length due to the variable location of external equipment, thus reducing costs and improving system reliability.

[0018] 2. The first conductor and the second conductor in this structure adopt a cylindrical interlocking and rotating connection design, which not only makes the connection stable, but also facilitates installation and disassembly, thus improving maintenance efficiency.

[0019] 3. In this structure, the axial locking cooperation between the first locking device and the second locking device ensures the stability and safety of the connection between the cable connection device and the junction box body, and prevents the connection from loosening due to vibration or external force. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the cable connection device according to an embodiment of this application.

[0021] Figure 2 This is a cross-sectional view of a cable connection device according to an embodiment of this application.

[0022] Figure 3 This is a top view of the junction box body of the photovoltaic power semiconductor junction box according to an embodiment of this application.

[0023] Figure 4 This is a cross-sectional view of the junction box body of the photovoltaic power semiconductor junction box according to an embodiment of this application.

[0024] Figure 5 This is a cross-sectional view of the photovoltaic power semiconductor junction box after assembly and connection according to an embodiment of this application.

[0025] The components are labeled as follows: first housing 11, first connecting end 112, cable 12, first conductor 13, first end 131, second end 132, locking ring 14, and protrusion 141.

[0026] Junction box body 2, second housing 21, photovoltaic power semiconductor module 22, extension 3, third housing 31, second connection end 312, second conductor 32, third end 321, fourth end 322, groove 33. Detailed Implementation

[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0028] like Figure 1 and Figure 2 As shown, an embodiment of this application discloses a cable connection device, including a first housing 11, a cable 12, and a first conductor 13 located inside the first housing 11. The first end 131 of the first conductor 13 is electrically connected to the cable 12, and the second end 132 of the first conductor 13 is used to electrically connect to a photovoltaic power semiconductor module 22 in an external junction box. One end of the first housing 11 is a first connection end 112, which is used to rotatably connect to the external junction box.

[0029] Specifically, when making the connection, the first connection end 112 of the first housing 11 is aligned with the connection point of the external junction box to achieve a rotatable connection with the external junction box. Once the first housing 11 is connected to the external junction box, the operation of electrically connecting the cable 12 to the photovoltaic power semiconductor module 22 in the external junction box is completed.

[0030] The cable connection device in this structure allows for flexible connection of cable 12 to junction box at multiple angles, effectively avoiding the need to manufacture junction boxes of various specifications or significantly increase the length of cable 12 due to the non-fixed position of external equipment, thus reducing costs and improving system reliability.

[0031] In this embodiment, the second end 132 of the first conductor 13 is cylindrical, and the first connection end 112 is cylindrical.

[0032] Specifically, since the second end 132 and the first connection end 112 of the first conductor 13 are both connection parts to the external junction box, the cylindrical structure design allows the first conductor 13 and the first connection end 112 to rotate more smoothly when they are rotated to the external junction box, reducing friction and resistance during the connection process and improving the flexibility and reliability of the connection.

[0033] In this embodiment, a first locking device for axial positioning is provided at the first connecting end 112.

[0034] Specifically, the first locking device can fix the first housing 11 in the axial direction after it is plugged into the external junction box, preventing the first housing 11 from loosening or falling off in the axial direction due to vibration, external force or other factors, thereby ensuring the stability of the electrical connection between the cable 12 and the photovoltaic power semiconductor module 22 in the external junction box.

[0035] like Figures 3 to 5 As shown, this utility model also discloses a photovoltaic power semiconductor junction box, including the cable connection device described above, and a junction box body 2. A photovoltaic power semiconductor module 22 is disposed inside the junction box body 2. An extension 3 is disposed on one side of the junction box body 2. The end of the extension 3 away from the junction box body 2 is a second connection end 312. The first connection end 112 and the second connection end 312 are inserted and rotated together. When the first connection end 112 and the second connection end 312 are inserted and connected, the first conductor 13 and the photovoltaic power semiconductor module 22 are electrically connected.

[0036] Specifically, when connecting the junction box and the cable connection device, first place the junction box body 2 in a suitable position, aligning the second connection end 312 of its extension 3 with the first connection end 112 of the cable connection device. Then, insert the first connection end 112 and the second connection end 312. Since the first connection end 112 and the second connection end 312 are rotatably connected, the angle can be adjusted according to actual needs after insertion to accommodate the position of external equipment. Once inserted, the first conductor 13 and the photovoltaic power semiconductor module 22 achieve electrical connection, at which point the cable 12 can transmit power to the photovoltaic power semiconductor module 22 inside the junction box.

[0037] The above structure, through the plug-in and rotational connection of the first connecting end 112 and the second connecting end 312, not only realizes the free connection of the cable 12 and the junction box at multiple angles, but also greatly simplifies the installation process, enabling the staff to quickly and accurately connect the cable 12 and the junction box according to the actual position of the external equipment.

[0038] In this embodiment, the junction box body 2 includes a second housing 21, and the photovoltaic power semiconductor module 22 is disposed inside the second housing 21; the extension 3 includes a third housing 31, and a second conductor 32 is disposed inside the third housing 31. The two ends of the second conductor 32 are a third end 321 and a fourth end 322, respectively. The third end 321 of the second conductor 32 is connected to the photovoltaic power semiconductor module 22. When the first connection end 112 and the second connection end 312 are plugged and connected, the fourth end 322 of the second conductor 32 is electrically connected to the second end 132 of the first conductor 13.

[0039] Specifically, in the junction box body 2, the second housing 21 provides a stable and safe installation environment for the photovoltaic power semiconductor module 22, effectively protecting the module from interference and damage from the external environment. The third housing 31 of the extension 3 serves as the carrier of the second conductor 32, which functions as a power transmission component. When the first connection end 112 of the cable connection device is plugged into the second connection end 312 of the extension 3 of the junction box, the fourth end 322 of the second conductor 32 will be tightly electrically connected to the second end 132 of the first conductor 13, thereby ensuring that power can be smoothly transmitted from the cable 12 to the photovoltaic power semiconductor module 22, achieving stable operation of the entire photovoltaic system. This design not only improves the efficiency of power transmission but also enhances the reliability and stability of the system.

[0040] In this embodiment, the fourth end 322 of the second conductor 32 is cylindrical, and the fourth end 322 of the second conductor 32 is rotatably connected to the second end 132 of the first conductor 13.

[0041] Specifically, the plug-and-rotate connection method not only facilitates installation and disassembly but also maintains good stability after connection. Even under the influence of external environment, it is not prone to loosening or falling off, thus ensuring the continuity and stability of power transmission. In addition, the cylindrical structure design improves the flexibility of the connection, allowing the cable connection device to adapt to connection requirements at different angles, further enhancing the adaptability and reliability of the entire photovoltaic system.

[0042] In this embodiment, the fourth end 322 of the second conductor 32 and the second end 132 of the first conductor 13 are a mutually cooperating pin and socket structure.

[0043] Specifically, the design employs a pin and socket structure, ensuring precise alignment between the fourth end 322 of the second conductor 32 and the second end 132 of the first conductor 13 during connection. This effectively prevents problems such as poor contact or short circuits caused by inaccurate connections. This structure not only improves connection reliability but also simplifies and speeds up installation and disassembly, reducing maintenance costs and time. Furthermore, the tight fit between the pin and socket enhances connection stability, maintaining stable and continuous power transmission even under vibration or external forces.

[0044] In this embodiment, a second locking device is provided at the second connecting end 312 of the third housing 31 to cooperate with the first locking device for axial locking.

[0045] Specifically, the second locking device is designed to cooperate with the first locking device to lock the first connecting end 112 and the second connecting end 312 axially after they are inserted and rotated together. This axial locking prevents the connection from loosening or falling off due to vibration, external force, or other factors, thereby ensuring the stability and safety of the connection between the cable connection device and the junction box body 2.

[0046] In this embodiment, the first locking device is a groove 33 provided at the second connecting end 312 of the third housing 31. The groove 33 is arranged circumferentially along the third housing 31. The second locking device includes a locking ring 14 circumferentially provided at the first connecting end 112 of the first housing 11. A protrusion 141 is provided on the inner side of the locking ring 14. When the first locking device and the second locking device are connected, the protrusion 141 extends into the groove 33 and can rotate circumferentially around the groove 33.

[0047] Specifically, when connecting the cable connection device to the junction box body 2, after the first connecting end 112 and the second connecting end 312 are inserted and rotated into place, the inner protrusion 141 of the locking ring 14 at the first connecting end 112 of the first housing 11 will accurately extend into the groove 33 at the second connecting end 312 of the third housing 31. At this time, the protrusion 141 can rotate circumferentially within the groove 33. This ensures that the cable connection device and the junction box body 2 can be flexibly connected at multiple angles to adapt to the needs of different positions of external equipment, and also achieves axial locking through the cooperation of the groove 33 and the protrusion 141. This axial locking method effectively prevents the first connecting end 112 and the second connecting end 312 from loosening or falling off in the axial direction due to external vibration, external impact, etc., thereby ensuring the stability and reliability of the electrical connection between the cable 12 and the photovoltaic power semiconductor module 22 in the junction box, ensuring the normal operation of the power transmission of the entire photovoltaic system, and improving the overall performance and service life of the system.

[0048] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A cable connection device, characterized in that: The device includes a first housing (11), a cable (12), and a first conductor (13) located inside the first housing (11). The first end (131) of the first conductor (13) is electrically connected to the cable (12), and the second end (132) of the first conductor (13) is used to electrically connect to a photovoltaic power semiconductor module (22) in an external junction box. One end of the first housing (11) is a first connection end (112), which is used to rotatably connect to the external junction box.

2. The cable connection device as described in claim 1, characterized in that: The second end (132) of the first conductor (13) is cylindrical, and the first connection end (112) is cylindrical.

3. The cable connection device as described in claim 1, characterized in that: A first locking device for axial positioning is provided at the first connecting end (112).

4. A photovoltaic power semiconductor junction box, comprising the cable connection device according to any one of claims 1 to 3, characterized in that: It also includes a junction box body (2), in which a photovoltaic power semiconductor module (22) is provided. An extension (3) is provided on one side of the junction box body (2). The end of the extension (3) away from the junction box body (2) is a second connection end (312). The first connection end (112) and the second connection end (312) are inserted and rotated together. When the first connection end (112) and the second connection end (312) are inserted and connected together, the first conductor (13) and the photovoltaic power semiconductor module (22) are electrically connected.

5. The photovoltaic power semiconductor junction box as described in claim 4, characterized in that: The junction box body (2) includes a second housing (21), and the photovoltaic power semiconductor module (22) is disposed inside the second housing (21); The extension (3) includes a third housing (31), in which a second conductor (32) is disposed. The two ends of the second conductor (32) are a third end (321) and a fourth end (322), respectively. The third end (321) of the second conductor (32) is connected to the photovoltaic power semiconductor module (22). When the first connection end (112) and the second connection end (312) are plugged together, the fourth end (322) of the second conductor (32) is electrically connected to the second end (132) of the first conductor (13).

6. The photovoltaic power semiconductor junction box as described in claim 4, characterized in that: The fourth end (322) of the second conductor (32) is cylindrical, and the fourth end (322) of the second conductor (32) is inserted and rotated to connect with the second end (132) of the first conductor (13).

7. The photovoltaic power semiconductor junction box as described in claim 6, characterized in that: The fourth end (322) of the second conductor (32) and the second end (132) of the first conductor (13) are a mutually cooperating pin and socket structure.

8. The photovoltaic power semiconductor junction box as described in claim 4, characterized in that: The third housing (31) is provided with a second locking device at the second connecting end (312) that cooperates with the first locking device for axial locking.

9. The photovoltaic power semiconductor junction box as described in claim 8, characterized in that: The first locking device is a groove (33) provided at the second connecting end (312) of the third housing (31). The groove (33) is arranged circumferentially along the third housing (31). The second locking device includes a locking ring (14) circumferentially provided at the first connecting end (112) of the first housing (31). A protrusion (141) is provided on the inner side of the locking ring (14). When the first locking device and the second locking device are connected, the protrusion (141) extends into the groove (33) and can rotate circumferentially around the groove (33).

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