Photovoltaic junction box

Abstract

The utility model relates to the field of photovoltaic technology, in particular to a photovoltaic junction box. The photovoltaic junction box comprises a body, a diode, a cable and a reinforcing member. A terminal assembly is arranged in the body, and a riveting part is arranged on the terminal assembly. The diode is electrically connected with the terminal assembly. The end part of the cable passes through the riveting part and is folded to the outer side of the riveting part; the caulking portion is configured to caulk the cable. And the reinforcing member is riveted on the riveting part and the cable folded to the outer side of the riveting part. The photovoltaic junction box can improve the reliability and stability of the connection part of the terminal assembly and the cable, and reduces the contact resistance.

Description

Photovoltaic junction box Technical Field

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

[0002] Currently, in the structural design of photovoltaic junction boxes, the terminals are typically copper terminals, and the cables conductively connected to the copper terminals are usually aluminum cables. Existing technology typically uses copper-aluminum friction welding to connect the aluminum cables to the copper terminals. However, due to the difference in thermal deformation coefficients between copper and aluminum, the copper terminals encase the aluminum cables, making the connection prone to loosening under high and low temperature variations. This increases contact resistance and reduces the stability and reliability of the photovoltaic junction box.

[0003] Therefore, there is an urgent need to design a photovoltaic junction box to solve the above technical problems. Summary of the Invention

[0004] The purpose of this invention is to provide a photovoltaic junction box that improves the reliability and stability of the connection between the terminal assembly and the cable, and reduces the contact resistance.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] This utility model provides a photovoltaic junction box, comprising:

[0007] The main body has a terminal assembly inside it, and the terminal assembly has a riveting part.

[0008] A diode, which is electrically connected to the terminal assembly;

[0009] A cable, the end of which passes through the riveting portion and is folded to the outside of the riveting portion; the riveting portion is configured to rivet the cable;

[0010] A reinforcement member, which is riveted to the riveted portion and the cable folded to the outside of the riveted portion.

[0011] As an optional technical solution for a photovoltaic junction box, the cable includes a wire core and an outer sheath covering the wire core. The wire core includes a first core segment, a second core segment, and a third core segment extending out of the outer sheath. Along the axial direction of the cable, the first core segment is located at the end of the second core segment close to the outer sheath, and the third core segment is located at the end of the second core segment away from the outer sheath.

[0012] The riveting portion covers and presses the second core segment, the third core segment passes through the riveting portion and folds to the outside of the riveting portion, and the end of the third core segment away from the second core segment extends beyond the riveting portion and overlaps with the first core segment;

[0013] The reinforcement includes a first ring portion and a second ring portion that are connected to each other. The first ring portion is riveted to the riveted portion and a portion of the third core segment, and the second ring portion is riveted to the first core segment and a portion of the third core segment.

[0014] As an optional technical solution for a photovoltaic junction box, the reinforcement also includes a third ring, which is connected to the end of the second ring that is opposite to the first ring, and the third ring is sleeved on the outer sheath of the cable.

[0015] As an optional technical solution for a photovoltaic junction box, the end of the second ring portion opposite to the first ring portion includes a limiting surface, which can abut against the end of the outer sleeve.

[0016] As an optional technical solution for a photovoltaic junction box, the first ring portion has an opening, which is arranged along the axial direction of the reinforcement, and the first end of the opening passes through the end of the first ring portion away from the second ring portion.

[0017] As an optional technical solution for photovoltaic junction boxes, the second end of the opening penetrates through the reinforcement along the axial direction of the reinforcement.

[0018] As an optional technical solution for photovoltaic junction boxes, the riveting part is plated with a protective layer.

[0019] As an optional technical solution for photovoltaic junction boxes, the protective layer is set as a tin-plated layer.

[0020] As an optional technical solution for a photovoltaic junction box, the riveting part is made of copper or copper alloy, the reinforcing part is made of aluminum or aluminum alloy, and the cable is made of aluminum or aluminum alloy.

[0021] Alternatively, the material of the riveting part is metallic copper or copper alloy, the material of the reinforcing part is metallic copper or copper alloy, and the material of the cable is metallic copper or copper alloy.

[0022] As an optional technical solution for a photovoltaic junction box, the main body includes a base, a cover, and a diode. The diode is electrically connected to the terminal assembly. The riveting part on the terminal assembly is riveted and pressed tightly to the cable and electrically connected. The base and the cover are fastened together to form an accommodating cavity. The diode, the terminal assembly, and the reinforcing member are all located in the accommodating cavity.

[0023] The beneficial effects of this utility model include at least the following:

[0024] This utility model provides a photovoltaic junction box, which includes a body, a diode, a cable, and a reinforcing component. A terminal assembly is disposed within the body, and a riveting portion is provided on the terminal assembly. The diode is electrically connected to the terminal assembly. The end of the cable passes through the riveting portion and is folded to the outside of the riveting portion; the riveting portion is configured to rivet the cable. The reinforcing component is riveted to the riveting portion and the cable folded to the outside of the riveting portion.

[0025] In this invention, the cable end passes through the riveting part and folds over to the outside of the riveting part. A reinforcing member is riveted to the riveting part and the cable folded over to the outside of the riveting part, thus forming a protective structure with a cross-section of "reinforcing member-cable-riveting part-cable". The reinforcing member enables secondary riveting of the cable, thereby improving the reliability and stability of the connection between the terminal assembly and the cable, and reducing the loosening of the connection due to inconsistent thermal deformation coefficients. Simultaneously, the cable end in this structure passes through the riveting part and folds over to the outside of the riveting part, then undergoes secondary riveting using the reinforcing member. This increases the cross-sectional area of ​​the cable at the connection, increases the contact area between the cable and the riveting part, reduces the contact resistance at the connection, and improves the power of the photovoltaic module. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0027] Figure 1 is a structural schematic diagram of the photovoltaic junction box provided in an embodiment of the present invention;

[0028] Figure 2 is an exploded view of the photovoltaic junction box provided in an embodiment of this utility model;

[0029] Figure 3 is a schematic diagram of the terminal assembly and cable connection provided in an embodiment of the present invention.

[0030] Figure 4 is a schematic diagram of the terminal assembly and cable connection provided in the embodiment of this utility model.

[0031] Figure 5 is a schematic diagram of the structure of the reinforcement riveted to the terminal assembly and the cable according to an embodiment of the present invention;

[0032] Figure 6 is a cross-sectional view of the first ring riveted to the second core segment in a structural schematic diagram provided in an embodiment of the present invention;

[0033] Figure 7 is a cross-sectional view of the first ring riveting the second core segment and the third core segment in the second structural schematic diagram provided in the embodiment of this utility model;

[0034] Figure 8 is a cross-sectional view of the second ring riveting the first core segment in a structural schematic diagram provided in an embodiment of the present invention;

[0035] Figure 9 is a cross-sectional view of the cable of the riveted part of the reinforcement provided in the embodiment of this utility model;

[0036] Figure 10 is a schematic diagram of the structure of the reinforcement provided in an embodiment of this utility model;

[0037] Figure 11 is a second structural schematic diagram of the reinforcement provided in an embodiment of this utility model;

[0038] Figure 12 is a schematic diagram of the structure of the reinforcement provided in the embodiment of this utility model.

[0039] Figure Labels

[0040] 10. Body; 11. Terminal assembly; 12. Riveting part; 13. Cover; 14. Base; 15. Diode; 16. Wire clamp;

[0041] 20. Cable; 21. First core segment; 22. Second core segment; 23. Third core segment; 24. Outer jacket;

[0042] 30. Reinforcing component; 31. First ring; 32. Second ring; 321. Limiting surface; 33. Third ring; 34. Opening. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0045] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0046] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0047] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0048] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0050] This embodiment provides a photovoltaic junction box that improves the reliability and stability of the connection between the terminal assembly and the cable, and reduces contact resistance.

[0051] As shown in Figures 1-5, the photovoltaic junction box mainly includes a body 10, a diode 15, a cable 20, and a reinforcing member 30. A terminal assembly 11 is disposed within the body 10, and a riveting portion 12 is provided on the terminal assembly 11. The diode 15 is electrically connected to the terminal assembly 11. The end of the cable 20 is disposed within the riveting portion 12; or, the end of the cable 20 passes through the riveting portion 12 and is folded to the outside of the riveting portion 12; the riveting portion 12 is configured to rivet the cable 20. The reinforcing member 30 is riveted to the riveting portion 12; or, the reinforcing member 30 is riveted to both the riveting portion 12 and the cable 20 folded to the outside of the riveting portion 12.

[0052] Based on the above design, in this embodiment, the connection between the cable 20 and the terminal assembly 11 has two structural forms. One structure is as follows: the end of the cable 20 is disposed within the riveting portion 12 of the terminal assembly 11, where the riveting portion 12 performs the first riveting of the cable 20; a reinforcing member 30 is riveted around the riveting portion 12, thus forming a protective structure with a cross-section of "reinforcing member 30 - riveting portion 12 - cable 20". The reinforcing member 30 performs a secondary riveting of the cable 20, thereby improving the reliability and stability of the connection between the terminal assembly 11 and the cable 20, and reducing the loosening of the connection due to inconsistent thermal deformation coefficients. Simultaneously, the reinforcing member 30 increases the contact area (the contact area between the outer wall of the riveting portion 12 and the inner wall of the reinforcing member 30), reduces the contact resistance at the connection between the riveting portion 12 and the cable 20, and improves the power of the photovoltaic module.

[0053] Another structure involves the cable 20 having its end pass through the riveting part 12 and folded over to the outside of the riveting part 12. A reinforcement 30 is then riveted to the riveting part 12 and the cable 20 folded over to the outside of the riveting part 12, forming a protective structure with a cross-section of "reinforcement 30 - cable 20 - riveting part 12 - cable 20". The reinforcement 30 enables secondary riveting of the cable 20, thereby improving the reliability and stability of the connection between the terminal assembly 11 and the cable 20, and reducing the loosening of the connection due to inconsistent thermal deformation coefficients. Furthermore, in this structure, the cable 20's end passes through the riveting part 12 and folds over to the outside of the riveting part 12, then undergoes secondary riveting using the reinforcement 30. This increases the cross-sectional area of ​​the cable 20 at the connection, increases the contact area between the cable 20 and the riveting part 12, reduces the contact resistance at the connection, and improves the power output of the photovoltaic module.

[0054] It should be noted that, whether in the first or second riveting process, the cable 20 is squeezed, deformed, or misaligned, and the oxide layer on the surface is damaged. This enables the cable 20 to achieve a reliable electrical connection with the cable 20 and with the riveting part 12 of the terminal assembly 11.

[0055] As shown in Figures 3, 6, and 8, in this embodiment, when the connection between the cable 20 and the terminal assembly 11 is in the first structure, the cable 20 includes a wire core and an outer jacket 24 covering the wire core. The wire core includes a first core segment 21 and a second core segment 22 extending out of the outer jacket 24. Along the axial direction of the cable 20, the first core segment 21 is located at one end of the second core segment 22 near the outer jacket 24. The riveting part 12 covers and presses the second core segment 22. The reinforcing member 30 includes a first ring part 31 and a second ring part 32 connected to each other. The first ring part 31 is riveted to the riveting part 12, and the second ring part 32 is riveted to the first core segment 21.

[0056] For example, the riveting part 12 covers and presses the second core segment 22 and the first ring part 31 of the reinforcement 30 covers and presses the riveting part 12, which can be completed in one riveting or in steps.

[0057] The first ring portion 31 of the reinforcing member 30 is riveted and pressed onto the riveting portion 12, which in turn rivets the second core segment 22. The second ring portion 32 of the reinforcing member 30 is riveted onto the first core segment 21. This effectively prevents the riveting portion 12 from squeezing or cutting the cable 20 when the cable 20 swings, thereby preventing the cable 20 from breaking. In addition, it increases the contact area between the second ring portion 32 and the first core segment 21, thereby forming a parallel resistance, reducing the contact resistance at the connection point, reducing the resistance of the entire circuit, and improving the power of the photovoltaic module.

[0058] As shown in Figures 4 and 7, in this embodiment, when the connection between the cable 20 and the terminal assembly 11 is in the second structure, the cable 20 includes a core and an outer sheath 24 covering the core. The core includes a first core segment 21, a second core segment 22, and a third core segment 23 extending out of the outer sheath 24. Along the axial direction of the cable 20, the first core segment 21 is located at the end of the second core segment 22 near the outer sheath 24, and the third core segment 23 is located at the end of the second core segment 22 away from the outer sheath 24. The riveting part 12 covers and presses the second core segment 22, and the third core segment 23 passes through the riveting part 12 and folds over to the outside of the riveting part 12. The end of the third core segment 23 away from the second core segment 22 extends beyond the riveting part 12 and overlaps with the first core segment 21. The reinforcement member 30 includes a first ring portion 31 and a second ring portion 32 that are connected to each other. The first ring portion 31 is riveted to the riveting portion 12 and a portion of the third core segment 23, and the second ring portion 32 is riveted to the first core segment 21 and a portion of the third core segment 23.

[0059] For example, the riveting part 12 covers and presses the second core segment 22, and the first ring part 31 of the reinforcement 30 covers and presses the riveting part 12 and part of the third core segment 23. The riveting can be completed in one step or in stages.

[0060] The first ring portion 31 of the reinforcing member 30 is riveted and pressed against the riveting portion 12 and part of the third core segment 23, while the riveting portion 12 is riveted to the second core segment 22. The second ring portion 32 of the reinforcing member 30 is riveted to the first core segment 21 and part of the third core segment 23. This effectively prevents the riveting portion 12 from squeezing or cutting the cable 20 when the cable 20 swings, thereby preventing the cable 20 from breaking. In addition, since the end of the third core segment 23 away from the second core segment 22 extends beyond the riveting portion 12 and overlaps with the first core segment 21, when the second ring portion 32 is riveted, the second ring portion 32 can connect the part of the third core segment 23 that extends beyond the riveting portion 12 in parallel with the first core segment 21, increasing the cross-sectional area of ​​the cable 20 and further reducing the contact resistance.

[0061] Furthermore, as shown in Figure 5, the reinforcement member 30 also includes a third ring portion 33, which is connected to the end of the second ring portion 32 opposite to the first ring portion 31. The third ring portion 33 is sleeved on the outer jacket 24 of the cable 20. The third ring portion 33 can limit the cable 20 when it swings. Specifically, in this embodiment, when the cable 20 swings, the third ring portion 33 can constrain the outer jacket 24 to prevent the first core segment 21 extending out of the outer jacket 24 from bending excessively, effectively preventing the riveting portion 12 and the second ring portion 32 from cutting the first core segment 21, thereby preventing the first core extending out of the outer jacket 24 from breaking.

[0062] As shown in Figure 9, the end of the second ring portion 32 facing away from the first ring portion 31 includes a limiting surface 321, which abuts against the end of the outer jacket 24. This prevents the first core segment 21 extending out of the outer jacket 24 from excessively bending when the cable 20 swings. In this embodiment, preferably, the second ring portion 32 is crimped first to ensure that the limiting surface 321 abuts against the end of the outer jacket 24, and then the first ring portion 31 and the third ring portion 33 are crimped. It is worth mentioning that the end of the second ring portion 32 facing away from the first ring portion 31 may not be crimped against the first core segment 21 to reduce the deformation of the limiting surface 321 and ensure a good fit between the limiting surface 321 and the end of the outer jacket 24.

[0063] Optionally, a gap can also be formed between the limiting surface 321 and the end of the outer sleeve 24 along the axial direction of the reinforcement 30, which makes it easier to rivet the reinforcement 30.

[0064] As shown in Figure 10, in some embodiments, the first ring portion 31 is provided with an opening 34, which is arranged along the axial direction of the reinforcing member 30. The first end of the opening 34 passes through the end of the first ring portion 31 that is away from the second ring portion 32. With the opening 34, even if the riveting part 12 undergoes a large deformation after being pressed, the first ring portion 31 can still be smoothly fitted onto the riveting part 12, thereby realizing the pressing of the first ring portion 31 onto the riveting part 12.

[0065] In an optional embodiment, as shown in FIG11, the second end of the opening 34 penetrates the reinforcing member 30 along the axial direction of the reinforcing member 30. That is, both ends of the opening 34 penetrate the reinforcing member 30, and the reinforcing member 30 is a ring sleeve of the opening 34. When the reinforcing member 30 is pressed, the reinforcing member 30 is more likely to deform, and the third ring 33 can undergo greater deformation when the first ring 31 and the second ring 32 are pressed together, which can better constrain the outer sleeve 24 and more effectively prevent the first core segment 21 extending out of the outer sleeve 24 from breaking.

[0066] In one alternative embodiment, since the reinforcement 30 has an opening 34, a locking clamp (not shown in the figure) can be fitted onto the reinforcement 30 to prevent deformation.

[0067] In an optional embodiment, as shown in FIG12, the reinforcement 30 is configured as a closed ring structure, that is, the reinforcement 30 may not have an opening 34, making the riveting more stable and reliable.

[0068] In this embodiment, to prevent electrochemical corrosion between the riveting part 12 and the wire core, the riveting part 12 is covered with a protective layer (not shown in the figure), which prevents the wire core and the first ring part 31 from directly contacting the riveting part 12. The protective layer has a relatively large thickness to prevent the riveting part 12 from tearing due to deformation during the crimping process, thereby more effectively preventing electrochemical corrosion caused by direct contact between the riveting part 12 and the wire core and the first ring part 31.

[0069] For example, the protective layer can be a tin-plated layer.

[0070] For example, the material of the reinforcement 30 and the wire core can be the same metal or the same type of metal alloy, and the two are not affected by electrochemical corrosion, which can reduce the contact resistance between the terminal assembly 11 and the wire core. Of course, the reinforcement 30 can also be an insulating material, a conductive material different from the wire core material, etc., and this application does not limit it.

[0071] In one optional embodiment, the riveting part 12 is made of metallic copper or copper alloy, the reinforcing part 30 is made of metallic copper or copper alloy, and the wire core is made of metallic copper or copper alloy. While ensuring that the riveting part 12 clamps the wire core stably and reliably, the contact resistance between the terminal assembly 11 and the wire core can be reduced.

[0072] In one optional embodiment, the riveting part 12 is made of copper or copper alloy, the reinforcing part 30 is made of aluminum or aluminum alloy, and the wire core is made of aluminum or aluminum alloy, so as to realize the connection between the terminal assembly 11 and the cable 20. While ensuring that the riveting part 12 presses the wire core stably and reliably, the contact resistance between the terminal assembly 11 and the wire core can be reduced.

[0073] In an optional embodiment, the terminal assembly 11 further includes conductive paste (not shown) that fills the space between the riveting portion 12 and the wire core of the cable 20. Exemplarily, before crimping the riveting portion 12, conductive paste can be applied to at least one of the riveting portion 12 and the wire core. Preferably, the conductive paste is applied to the wire core; after crimping the riveting portion 12, the conductive paste can fill the gap between the riveting portion 12 and the wire core, and can isolate the wire core from contact with air, effectively preventing oxidation of the wire core.

[0074] As shown in Figures 1 and 2, in this embodiment, the body 10 also includes a base 14 and a cover 13. The riveting portion 12 on the terminal assembly 11 is riveted and pressed tightly with the cable 20 and electrically connected. The base 14 and the cover 13 are fastened together to form a receiving cavity, in which the diode 15, the terminal assembly 11, and the reinforcing member 30 are all located. The receiving cavity is filled with sealant, which provides a certain degree of protection and sealing for the internal diode 15 and terminal assembly 11, reducing or preventing erosion by external rainwater and improving safety.

[0075] Furthermore, the base 14 in this embodiment is also provided with a wire clamping position, and the body 10 also includes a wire clamping buckle 16, which is snapped onto the wire clamping position. The wire clamping buckle 16 can limit the cable 20 to a certain extent, reducing the impact of the cable 20 swinging during use on the body 10.

[0076] Obviously, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

[0077] Note that in the description of this specification, the references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A photovoltaic junction box, characterized in that, include: The body (10) is provided with a terminal assembly (11) and a riveting part (12) is provided on the terminal assembly (11); a diode (15) is electrically connected to the terminal assembly (11); a cable (20) has its end passing through the riveting part (12) and folded to the outside of the riveting part (12); the riveting part (12) is configured to rivet the cable (20); and a reinforcing member (30) is riveted to the riveting part (12) and the cable (20) folded to the outside of the riveting part (12).

2. The photovoltaic junction box according to claim 1, characterized in that, The cable (20) includes a core and an outer sheath (24) covering the core. The core includes a first core segment (21), a second core segment (22), and a third core segment (23) extending out of the outer sheath (24). Along the axial direction of the cable (20), the first core segment (21) is located at the end of the second core segment (22) near the outer sheath (24), and the third core segment (23) is located at the end of the second core segment (22) away from the outer sheath (24). The riveting part (12) covers and presses the second core segment (22), and the third core segment (21) is located at the end of the second core segment (22) away from the outer sheath (24). 23) Passing through the riveting part (12) and folding to the outside of the riveting part (12), and the end of the third core segment (23) away from the second core segment (22) extends beyond the riveting part (12) and overlaps with the first core segment (21); the reinforcing member (30) includes a first ring part (31) and a second ring part (32) connected to each other, the first ring part (31) being riveted to the riveting part (12) and part of the third core segment (23), and the second ring part (32) being riveted to the first core segment (21) and part of the third core segment (23).

3. The photovoltaic junction box according to claim 2, characterized in that, The reinforcement (30) also includes a third ring (33), which is connected to the end of the second ring (32) away from the first ring (31), and the third ring (33) is sleeved on the outer jacket (24) of the cable (20).

4. The photovoltaic junction box according to claim 3, characterized in that, The second ring portion (32) has a limiting surface (321) at one end away from the first ring portion (31), which can abut against the end of the outer sleeve (24).

5. The photovoltaic junction box according to claim 3, characterized in that, The first ring portion (31) is provided with an opening (34) which is arranged along the axial direction of the reinforcement (30). The first end of the opening (34) passes through the end of the first ring portion (31) away from the second ring portion (32).

6. The photovoltaic junction box according to claim 5, characterized in that, Along the axial direction of the reinforcement (30), the second end of the opening (34) penetrates the reinforcement (30).

7. The photovoltaic junction box according to claim 1, characterized in that, The riveted part (12) is plated with a protective layer.

8. The photovoltaic junction box according to claim 7, characterized in that, The protective layer is a tin-plated layer.

9. The photovoltaic junction box according to claim 1, characterized in that, The material of the riveting part (12) is copper or copper alloy, the material of the reinforcing part (30) is aluminum or aluminum alloy, and the material of the cable (20) is aluminum or aluminum alloy; or, the material of the riveting part (12) is copper or copper alloy, the material of the reinforcing part (30) is copper or copper alloy, and the material of the cable (20) is copper or copper alloy.

10. The photovoltaic junction box according to claim 1, characterized in that, The body (10) includes a base (14) and a cover (13). The riveting part (12) on the terminal assembly (11) is riveted and pressed to the cable (20) and electrically connected. The base (14) and the cover (13) are fastened together to form a receiving cavity. The diode (15), the terminal assembly (11) and the reinforcing member (30) are all located in the receiving cavity.

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