Photovoltaic junction box

Abstract

The utility model provides a photovoltaic junction box comprising a box body which is provided with a first through hole which penetrates into the box body and is used for an external wire to pass through; the butt joint assembly is arranged in the box body and comprises a mounting part and a packaging diode, the mounting part is used for mounting the external wire and is provided with a first contact part, and the first contact part is conductively connected with the external wire; the packaging diode is provided with a second contact part, and the second contact part and the first contact part are in contact with each other and are in conductive connection; and the clamping assembly is arranged in the box body and is used for clamping an assembly leading-out wire penetrating through the box body, the first contact part and the second contact part. According to the invention, the assembly lead-out wires are connected in a mechanical manner, so that the problem of insufficient soldering caused by welding the assembly lead-out wires on the bonding pad of the junction box through high-temperature tin addition is avoided.

Description

Technical Field

[0001] This application relates to the field of photovoltaic module technology, and in particular to a photovoltaic junction box. Background Technology

[0002] A photovoltaic junction box is a connecting device between a solar cell array composed of solar cell modules and a solar charging control device. Its main function is to connect and protect the solar photovoltaic modules, connect the electricity generated by the solar cells to external lines, conduct the current generated by the photovoltaic modules, and realize power output.

[0003] Currently, in existing technologies, photovoltaic junction boxes utilize external wiring cables to solder copper sheets, and then connect to diodes. Since the module leads are soldered to the junction box pads using high-temperature tinning, this method can result in incomplete soldering. Furthermore, the need for soldering makes the device less convenient to use.

[0004] Therefore, there is an urgent need to provide a photovoltaic junction box to solve the technical problems mentioned above. Utility Model Content

[0005] Based on this, in order to overcome the shortcomings of the prior art, this application provides a photovoltaic junction box that uses mechanical clamping to connect the module leads, thereby avoiding the problem of poor soldering that occurs when the module leads are soldered to the pads of the junction box at high temperature, and greatly improving the convenience of the device.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] This application provides a photovoltaic junction box, comprising: a box body having a first through hole extending into the interior for an external wiring to pass through; a docking assembly disposed within the box body and including a mounting portion and an encapsulated diode, the mounting portion being for mounting the external wiring and having a first contact portion electrically connected to the external wiring; the encapsulated diode having a second contact portion, the second contact portion and the first contact portion being in contact with each other and electrically connected; and a clamping assembly disposed within the box body for clamping the component lead wire passing through the box body, the first contact portion, and the second contact portion.

[0008] An alternative solution is that the mounting part is a mounting clamp, and the first contact part is provided at the front end of the mounting clamp; the end of the external wiring inside the box is inserted into the rear end of the mounting clamp, and the inner peripheral wall of the mounting clamp and the outer peripheral wall of the external wiring are tightly fitted together.

[0009] An alternative arrangement is that the second contact portion is stacked on the first contact portion; the clamping assembly is disposed on the side of the second contact portion away from the first contact portion; the first contact portion and the second contact portion are respectively provided with lead wire grooves at corresponding positions for the component lead wire to be led out; the component lead wire passes through the lead wire groove from bottom to top and is led to a position between the second contact portion and the clamping assembly.

[0010] An alternative solution is that the clamping assembly includes a clamping plate disposed on the second contact portion and a connector for connecting and fixing the clamping plate to the first contact portion; the clamping plate is provided with a constraint groove on the side facing the second contact portion for the assembly lead wire to pass through and constrain it.

[0011] An alternative is that the clamping plate has a receiving groove at the bottom of the constraint groove; the receiving groove is provided with an elastic device, which is used to press the component lead wire onto the second contact part.

[0012] An alternative embodiment is that the elastic device includes an elastic plate and an elastic element; the elastic element is placed between the receiving groove and the elastic plate to apply pressure to the elastic plate, causing the elastic plate to press down and tighten the component lead wire.

[0013] An alternative is that the housing is provided with a locking device at the position of the first through hole; the locking device includes a fixed locking ring and a movable locking ring, the fixed locking ring is fixed to the outer side of the housing, and the movable locking ring is used to clamp the external wiring after cooperating with the fixed locking ring.

[0014] An optional solution is that the photovoltaic junction box further includes a protection component; the protection component includes an inner frame disposed within the box body, and a cavity is formed between the outer periphery of the inner frame and the inner periphery of the box body; the cavity is filled with a cushioning material, and the inner frame is provided with a second through hole corresponding to the first through hole on the box body.

[0015] An alternative solution is that a fixing block is also provided inside the cavity; one side of the fixing block is fixed to the outer wall of the inner frame and the other side is fixed to the inner wall of the box; and / or, a connecting frame is also provided inside the cavity; the connecting frame connects the inner frame and the box.

[0016] Alternatively, the housing may also include a support block that supports the bottom of the packaged diode; and / or, positioning frames may be spaced apart on the inner side of the housing, with one side of each positioning frame abutting against the opposite sides of the packaged diode.

[0017] The beneficial effects of this application are:

[0018] This application discloses a photovoltaic junction box, including a box body, a docking assembly, and a clamping assembly. The box body has a first through hole on its side wall for an external wire to pass through. The docking assembly is disposed within the box body and includes a mounting portion with a first contact portion for mounting the external wire and an encapsulated diode with a second contact portion. The first and second contact portions are in contact with each other and electrically connected, achieving an electrical connection between the external wire and the encapsulated diode. The clamping assembly clamps the component lead wire passing through the box body, the first contact portion, and the second contact portion to achieve conductivity between the component lead wire and the encapsulated diode. Furthermore, the mechanical clamping method achieves a fixed connection of the component lead wire, avoiding the problem of poor soldering caused by using high-temperature welding to fix the component lead wire. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the photovoltaic junction box structure in an embodiment of this application;

[0020] Figure 2 This is a schematic diagram of the internal structure of the photovoltaic junction box in an embodiment of this application;

[0021] Figure 3 This is a schematic diagram of the structure in which the protective components are installed inside the outer frame in an embodiment of this application;

[0022] Figure 4 This is a schematic diagram showing the connection relationship between the second contact portion of the packaged diode and the first contact portion of the mounting portion in an embodiment of this application;

[0023] Figure 5 This is a schematic diagram of the mounting section in an embodiment of this application;

[0024] Figure 6 This is a schematic diagram of the clamping assembly in an embodiment of this application;

[0025] Figure 7 This is a schematic diagram of the elastic device in the embodiments of this application.

[0026] Label Explanation:

[0027] 10. Box body; 11. First through hole; 12. Outer frame; 13. Top cover;

[0028] 20. External wiring;

[0029] 30. Connecting assembly; 31. Mounting part; 311. First contact part; 32. Encapsulated diode; 321. Second contact part; 33. Lead-out groove; 34. Threaded hole;

[0030] 40. Clamping assembly; 41. Clamping plate; 411. Constraint groove; 412. Receiving groove; 413. Mounting hole; 42. Elastic plate; 43. Elastic element;

[0031] 50. Engaging device; 51. Fixed retaining ring; 52. Movable retaining ring; 53. Fixing bolt; 54. Locking nut;

[0032] 60. Protective components; 61. Inner frame; 62. Cavity; 63. Cushioning material; 64. Fixing block; 65. Connecting frame;

[0033] 70. Support block;

[0034] 80. Positioning frame; 81. Positioning plate; 82. Support plate. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0036] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this application. Therefore, the drawings only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0037] The orientations or positional relationships indicated by terms such as "upper," "lower," "left," "right," "middle," "longitudinal," "lateral," "horizontal," "inner," "outer," "radial," and "circumferential" used in this specification are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the purpose of simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] This application provides a photovoltaic junction box, which uses the second contact of the encapsulated diode and the first contact of the mounting part to be connected and conductively connected to the external wiring. Then, the component lead wire, the second contact and the first contact are clamped and connected into a whole by a clamping assembly. Therefore, there is no need to weld them, and the device is highly convenient.

[0039] The following describes in detail a photovoltaic junction box provided in this embodiment with reference to the accompanying drawings. Figure 1 , Figure 2As shown, the assembly includes a housing 10, a docking component 30, and a clamping component 40. Both the docking component 30 and the clamping component 40 are disposed within the housing 10. The housing 10 has a first through hole 11 extending into the interior for the external wiring 20 to pass through. The docking component 30 includes a mounting portion 31 and a packaged diode 32. The mounting portion 31 is used for mounting the external wiring 20 and has a first contact portion 311, which is electrically connected to the external wiring 20. The packaged diode 32 has a second contact portion 321, which is in contact with the first contact portion 311 and the two are electrically connected. The clamping component 40 is used to clamp the component lead wire passing through the housing 10, the first contact portion 311, and the second contact portion 321.

[0040] In this embodiment, during assembly, the external wiring 20 is inserted through the first through hole 11 of the housing 10 and installed through the mounting portion 31 inside the housing 10. The external wiring 20 and the first contact portion 311 on the mounting portion 31 are electrically connected. Then, the second contact portion 321 of the encapsulated diode 32 and the first contact portion 311 of the mounting portion 31 are made into contact and electrically connected. Electricity can then be transmitted through the external wiring 20, the first contact portion 311, and the second contact portion 321 to the encapsulated diode 32 connected to the second contact portion 321, thus connecting the external wiring 20 to the encapsulated diode. 32 Electrical connection. In addition, the other end of the external wiring 20 is provided with a docking device for connecting multiple junction boxes. The diode is a commercially available solar photovoltaic box anti-reverse current diode. Then, the clamping assembly 40 clamps the component lead wire passing through the box body 10, the first contact part 311, and the second contact part 321, thereby making the component lead wire and the packaged diode 32 conductive. The connection and fixation of the component lead wire are achieved by this mechanical clamping method, which can eliminate the need for soldering, improve the convenience of the device, and avoid the problem of poor soldering caused by fixing the component lead wire by high temperature soldering.

[0041] Please refer to Figure 1 , Figure 3 As shown in this embodiment, it should be noted that the box body 10 consists of an outer frame 12 and an upper cover 13. The upper cover 13, in conjunction with the outer frame 12, seals the internal space. The outer frame 12 is rectangular, and the upper cover 13 fits the outer frame 12. The upper cover 13 can be assembled by fastening it to the outer frame 12, or it can be fixed by bolts or other means. The specific connection method is not limited in this embodiment. Preferably, the first through hole 11 is located on the side of the outer frame 12, connecting the inside and outside of the outer frame 12. The first through hole 11 is a round hole, mainly for fitting the external wiring 20. Furthermore, this photovoltaic junction box is a positive terminal junction box; the negative terminal junction box has the same structure and will not be described in detail here.

[0042] Please refer to Figure 2 , Figure 4 as well as Figure 5 As shown in the illustration, in this embodiment, it should also be noted that the docking assembly 30 is used to establish an electrical connection between the external wiring 20 and the packaged diode 32. In this application, the external wiring 20 extends into the interior through the first through hole 11 on the outer frame 12, and then connects to the packaged diode 32 through the docking assembly 30. The docking assembly 30 includes two parts: the first part is a mounting part 31 for mounting the external wiring 20, and the second part is the packaged diode 32. The front end of the mounting part 31 is provided with a first contact part 311, and the packaged diode 32 is provided with a second contact part 321. During docking, the first contact part 311 on the mounting part 31 and the second contact part 321 of the packaged diode 32 come into contact with each other, such as by overlapping the first contact part 311 and the second contact part 321, or by horizontal docking. In this embodiment, it is preferred that the second contact part 321 is overlapped on the first contact part 311, and the two are electrically connected. Thus, the conductive connection between the packaged diode 32 and the external wiring 20 is achieved by electrically connecting the first contact part 311 and the second contact part 321. It is feasible that both the first contact portion 311 and the second contact portion 321 are made of metal materials, and an electrical connection can be achieved by overlapping the two.

[0043] In one possible implementation, the mounting part 31 is a mounting clamp with openings on both sides. The first contact part 311 is fixed to the front end of the mounting clamp, and the rear end of the mounting clamp is mainly used for the external wire 20 to pass through. Then, the external wire 20 contacts and conducts electricity with the first contact part 311 inside the mounting clamp. The end of the external wire 20 located inside the outer frame 12 is sleeved inside the mounting clamp, and the outer periphery of the external wire 20 and the inner periphery of the mounting clamp are tightly fitted to achieve the clamping effect. Therefore, in this application, the external wire 20 is clamped inside by means of a mechanical method using a mounting clamp.

[0044] Furthermore, since this embodiment uses a method of stacking the second contact portion 321 on the first contact portion 311, lead wire grooves 33 are respectively formed at corresponding positions of the first contact portion 311 and the second contact portion 321. The size of the lead wire grooves 33 is adapted to the component lead wire. After the component lead wire passes through the bottom of the outer frame 12 into the interior, it can be led out through the lead wire grooves 33 to the top of the second contact portion 321. Then, by bending the component lead wire, the component lead wire is made to fit against the upper surface of the second contact portion 321. At this time, the clamping component 40 is used to clamp the component lead wire passing through the box 10 between the second contact portion 321 and the clamping component 40. In this way, the component lead wire is tightly connected to the second contact portion 321 in a mechanical manner, which eliminates the need for welding and improves the convenience of the device. At the same time, by setting the lead wire grooves 33, the component lead wire can be constrained to prevent the component lead wire from swaying left and right. It is feasible that both the first contact portion 311 and the second contact portion 321 can be configured as plates. The plate-shaped first contact portion 311 and the second contact portion 321 are easy to stack and have a large contact area, which facilitates conductivity. At the same time, the component lead wires can also be easily attached to the plate-shaped second contact portion 321 to achieve surface-to-surface contact and improve clamping stability. Of course, the bottom of the outer frame 12 also needs to be provided with wire holes for the component lead wires to pass through, or the bottom of the outer frame 12 needs to be open. The specific configuration is not specifically limited in this embodiment.

[0045] Please refer to Figure 2 , Figure 5 as well as Figure 6 As shown in this embodiment, it should also be noted that the clamping component 40 is used to press the component lead wire against the upper surface of the second contact portion 321 on the one hand, and to fix the second contact portion 321 and the first contact portion 311 on the other hand, so that the first contact portion 311, the second contact portion 321 and the component lead wire form a whole. Specifically, to quickly clamp the component lead wire without requiring high-temperature soldering, the clamping assembly 40 includes a clamping plate 41 and a connector. The clamping plate 41 is disposed on the upper surface of the second contact portion 321, and a constraint groove 411 is provided on the side of the clamping plate 41 facing the second contact portion 321 for the component lead wire to pass through and constrain it. The clamping plate 41 clamps the component lead wire between the clamping plate 41 and the second contact portion 321. The connector is used to connect and fix the clamping plate 41 and the first contact portion 311. Thus, the first contact portion 311, the second contact portion 321, the component lead wire, and the clamping plate 41 can be connected into a whole by using the connector. In this application, by providing the constraint groove 411 on the clamping plate 41, the component lead wire can be fixed in the constraint groove 411, avoiding the component lead wire from moving and causing unstable installation.

[0046] In one possible implementation, the clamping plate 41 has a mounting hole 413, and the first contact portion 311 and the second contact portion 321 have threaded holes 34 at positions corresponding to the mounting hole 413. When the clamping plate 41 is mounted on the second contact portion 321, a connecting member, such as a connecting bolt, is inserted through the mounting hole 413 and threaded into the threaded holes 34 of the first contact portion 311 and the second contact portion 321. In this way, the clamping plate 41 can fix the first contact portion 311 and the second contact portion 321. In other words, the clamping plate 41 connects the first contact portion 311, the second contact portion 321 and the component lead wire into a whole, thereby realizing the connection and fixation of the component lead wire.

[0047] In one possible implementation, in order to keep the component lead wire stable in the constraint groove 411, the clamping assembly 40 further includes a spring device. The clamping plate 41 protrudes at the bottom of the constraint groove 411, and a receiving groove 412 is provided at the protruding position. The opening of the receiving groove 412 communicates with the constraint groove 411. The spring device is installed in the receiving groove 412 and is used to press the component lead wire onto the second contact portion 321.

[0048] Specifically, the elastic device includes an elastic plate 42 and an elastic element 43. The elastic element 43 is placed between the receiving groove 412 and the elastic plate 42, and is used to connect the two. The elastic element 43 applies pressure to the elastic plate 42, causing the elastic plate 42 to press down and thus press the component lead wire. Preferably, the elastic element 43 can be a spring, with one end connected to the bottom of the receiving groove 412 and the other end connected to the elastic plate 42. Furthermore, to ensure the normal operation of the elastic device and to continuously apply force to the elastic plate 42, multiple sets of springs can be configured (e.g., ...). Figure 7 As shown, multiple sets of springs apply external force to press the components together, ensuring that the lead wires of the components are in close contact with the second contact part 321, thus achieving stable current transmission.

[0049] Please refer to Figure 1 , Figure 2 as well as Figure 3 As shown in this embodiment, it should also be noted that a locking device 50 is provided on the side wall of the outer frame 12 at the first through hole 11. The locking device 50 is used to further fix the external wiring 20.

[0050] Specifically, in this application, the external wiring 20 extends into the interior through the first through hole 11 on the side wall of the outer frame 12. In order to keep the external wiring 20 stable, a locking device 50 is provided at the first through hole 11 to lock and fix the external wiring 20 at the locking device 50, so as to prevent the external wiring 20 from shaking and affecting the connection stability of the internal connection structure.

[0051] In some embodiments, the locking device 50 has a fixed retaining ring 51 and a movable retaining ring 52. The fixed retaining ring 51 is fixed on the outer frame 12 and is provided with a slot adapted to the external wiring 20. After the movable retaining ring 52 is fixed in place with the fixed retaining ring 51, it is used to clamp the external wiring 20. It is possible that the movable retaining ring 52 and the fixed retaining ring 51 are arranged vertically, and the movable retaining ring 52 is installed from top to bottom with the fixed retaining ring 51, thereby clamping the external wiring 20 between the two. The upper part of the slot of the movable retaining ring 52 is threaded with a fixing bolt 53. After the movable retaining ring 52 and the fixed retaining ring 51 fix the external wiring 20, the fixing bolt 53 and the locking nut 54 are used to fix the movable retaining ring 52 and the fixed retaining ring 51. Of course, other methods can also be used to connect the movable retaining ring 52 and the fixed retaining ring 51. This embodiment does not impose specific limitations.

[0052] Please refer to Figure 2 and Figure 3 As shown in this embodiment, it should also be noted that the photovoltaic junction box further includes a protective component 60. This protective component 60 includes an inner frame 61, which is disposed inside the outer frame 12. A cavity 62 is formed between the inner frame 61 and the outer frame 12. In other words, a gap is left between the inner peripheral wall of the outer frame 12 and the outer peripheral wall of the inner frame 61. A buffer material 63 is filled in the cavity 62. By providing the buffer material 63 in the cavity 62, when the junction box is involved in a collision, the buffer material 63, together with the outer frame 12 and the inner frame 61, can protect the encapsulated diode 32 inside the outer frame 12. Preferably, the buffer material 63 can be a rubber pad. Furthermore, since the external wiring 20 needs to pass through the inner frame 61, a second through hole is also opened at the position corresponding to the first through hole 11 on the outer frame 12. This second through hole is used for the external wiring 20 to pass through. Of course, if the wiring passes through the buffer material 63, a through hole should also be opened, or the buffer material 63 should be filled to avoid the external wiring 20.

[0053] In some embodiments, a fixing block 64 is further provided between the inner frame 61 and the outer frame 12. One side of the fixing block 64 is fixed to the inner wall of the outer frame 12, and the other side is fixed to the outer wall of the inner frame 61. Four fixing blocks 64 are provided, each located at one of the four ends of the outer frame 12. The fixing blocks 64 are columnar and inserted into the cavity 62 from top to bottom. The fixing blocks 64 connect and fix the inner frame 61 and the outer frame 12, thereby forming a stable cavity 62.

[0054] Furthermore, a connecting frame 65 is provided between the inner frame 61 and the outer frame 12, i.e., in the cavity 62. The connecting frame 65 is used to connect the outer frame 12 and the inner frame 61 to further stabilize the inner frame 61.

[0055] Please refer to Figure 2 and Figure 4 As shown in the illustration, in this embodiment, it should also be noted that a support block 70 is provided inside the outer frame 12. The support block 70 can be fixed to the side of the outer frame 12 to provide support for the bottom of the packaged diode 32. In other words, the packaged diode 32 is mounted on the upper surface of the support block 70. Since the bottom of the outer frame 12 can be made open to allow the component leads to pass through, the support block 70 can be fixed to the side of the outer frame 12. Alternatively, the bottom surface of the outer frame 12 can be made closed, with wire holes provided, in which case the support block 70 can be fixed to the bottom surface of the outer frame 12.

[0056] In some embodiments, a positioning bracket 80 is also provided on the inner side of the outer frame 12. Two positioning brackets 80 are provided, spaced apart along the length of the outer frame 12, with the opposing sides of the two positioning brackets 80 respectively abutting against the opposite sides of the packaged diode 32. The positioning brackets 80 are used to position the packaged diode 32 for mounting.

[0057] Specifically, the positioning frame 80 can be configured in an L-shape, including a positioning plate 81 and a support plate 82. The positioning plate 81 is fixed to the side of the outer frame 12, and the support plate 82 is fixed below the positioning plate 81 to support the positioning plate 81. The positioning plate 81 and the support plate 82 form an L-shape, and the distance between the two positioning plates 81 is just enough for the encapsulated diode 32 to be installed. The opposite sides of the two positioning plates 81 respectively abut against the opposite sides of the encapsulated diode 32, thereby playing a positioning role in the installation of the encapsulated diode 32.

[0058] Working principle: When assembling the photovoltaic junction box, the encapsulated diode 32 is mounted onto the support block 70 using the positioning plate 81. Then, the external wiring 20 is passed through the first through hole 11 and the second through hole, and the mounting clamp is installed onto the external wiring 20. After the external wiring 20 is connected to the mounting clamp, the front end of the mounting clamp is welded to the first contact portion 311. The conductive part of the external wiring 20 is energized with the first contact portion 311. Then, the first contact portion 311, which is electrically connected to the external wiring 20, is mated with the second contact portion 321 of the encapsulated diode 32, that is, the second contact portion 321 is attached to the first contact portion 311. Then, the component lead wire is passed from the bottom of the outer frame 12 and through the lead wire groove 33 of the first contact portion 311 and the second contact portion 321, and then led out to the area above the second contact portion 321. The component lead wire is bent into the constraint groove 411 in the clamping plate 41, and then clamped. The constraint groove 411 in the clamping plate 41 is used to embed the component lead wire. At the same time, the elastic plate 42, which is forcefully applied by the elastic device, applies force to the component lead wire, stabilizing the component lead wire on the upper surface of the second contact 321 and preventing the component lead wire from loosening. Therefore, the electricity of the external wire 20 is transmitted to the packaged diode 32 through the first contact 311 and the second contact 321, which means that the external wire 20 can be electrically connected to the packaged diode 32. At the same time, the clamping group 40 clamps the component lead wire passing through the outer frame 12, the first contact 311, and the second contact 321, thereby realizing the connection and fixation of the component lead wire. The outer frame 12 and the inner frame 61 are connected by the fixing block 64. The rubber pad can be placed between the outer frame 12 and the inner frame 61. Then, the top cover 13 is installed on the outer frame 12. The other end of the external wire 20 can be equipped with a connector for use in connecting multiple junction boxes.

[0059] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A photovoltaic junction box, characterized in that, include: The housing (10) is provided with a first through hole (11) extending into the interior for external wiring (20) to pass through; A docking assembly (30) is disposed within the housing (10) and includes a mounting portion (31) and a packaged diode (32). The mounting portion (31) is used for mounting the external wiring (20) and is provided with a first contact portion (311), which is electrically connected to the external wiring (20). The packaged diode (32) is provided with a second contact portion (321), which is in contact with the first contact portion (311) and the two are electrically connected. A clamping assembly (40) is disposed inside the housing (10) and is used to clamp the component lead wire passing through the housing (10), the first contact portion (311), and the second contact portion (321).

2. The photovoltaic junction box according to claim 1, characterized in that, The mounting part (31) is a mounting clamp, and the first contact part (311) is provided at the front end of the mounting clamp; The end of the external wiring (20) located inside the housing (10) is inserted into the rear end of the mounting clamp, and the inner peripheral wall of the mounting clamp and the outer peripheral wall of the external wiring (20) are tightly fitted together.

3. The photovoltaic junction box according to claim 1 or 2, characterized in that, The second contact portion (321) is stacked on the first contact portion (311); The clamping assembly (40) is disposed on the side of the second contact portion (321) opposite to the first contact portion (311); The first contact portion (311) and the second contact portion (321) are respectively provided with lead wire grooves (33) for the lead wires of the component to be led out at corresponding positions; The component lead wire passes through the lead wire groove (33) from bottom to top and is led between the second contact part (321) and the clamping component (40).

4. The photovoltaic junction box according to claim 3, characterized in that, The clamping assembly (40) includes a clamping plate (41) disposed on the second contact portion (321) and a connecting member for connecting and fixing the clamping plate (41) to the first contact portion (311); The clamping plate (41) has a constraint groove (411) on the side facing the second contact part (321) for the component lead wire to pass through and constrain it.

5. The photovoltaic junction box according to claim 4, characterized in that, The clamping plate (41) is provided with a receiving groove (412) at the bottom of the groove of the constraint groove (411); An elastic device is provided in the receiving groove (412) for pressing the component lead wire onto the second contact part (321).

6. The photovoltaic junction box according to claim 5, characterized in that, The elastic device includes an elastic plate (42) and an elastic element (43); The elastic element (43) is placed between the receiving groove (412) and the elastic plate (42) to apply pressure to the elastic plate (42), so that the elastic plate (42) presses down and clamps the component lead wire.

7. The photovoltaic junction box according to claim 1, characterized in that, The box body (10) is provided with a locking device (50) at the position of the first through hole (11); The locking device (50) includes a fixed locking ring (51) and a movable locking ring (52). The fixed locking ring (51) is fixed to the outer side of the housing (10). After the movable locking ring (52) is fixed in conjunction with the fixed locking ring (51), it is used to clamp the external wiring (20).

8. The photovoltaic junction box according to claim 1, characterized in that, The photovoltaic junction box also includes a protection component (60); The protective component (60) includes an inner frame (61) disposed within the housing (10), and a cavity (62) is formed between the outer periphery of the inner frame (61) and the inner periphery of the housing (10). The cavity (62) is filled with a cushioning material (63), and the inner frame (61) is provided with a second through hole corresponding to the first through hole (11) on the box body (10).

9. The photovoltaic junction box according to claim 8, characterized in that, A fixing block (64) is also provided inside the cavity (62); One side of the fixing block (64) is fixed to the outer wall of the inner frame (61), and the other side is fixed to the inner wall of the box (10); And / or, A connecting frame (65) is also provided inside the cavity (62); The connecting frame (65) connects the inner frame (61) and the box body (10).

10. The photovoltaic junction box according to claim 1, characterized in that, The housing (10) is also provided with a support block (70), which supports the bottom of the packaged diode (32); And / or, positioning frames (80) are distributed at intervals on the inner side of the housing (10), and the opposite sides of the positioning frames (80) abut against the opposite sides of the packaged diode (32).

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