Junction box and photovoltaic module

Abstract

The utility model relates to a junction box and a photovoltaic module, and relates to the field of photovoltaic technology, the junction box comprises a box body, a diode and a conductive member, the box body is provided with an accommodating chamber, and the box body is provided with a notch for a bus bar to extend in; the diode is positioned in the accommodating chamber; the conductive part is located in the containing cavity, one end of the conductive part is connected with the diode, the other end of the conductive part extends to the notch, the face, facing the notch, of the conductive part is provided with a rough face, the bus bar extends into the notch, and the face of the bus bar is attached to the rough face. During installation, the bus bar extends into the accommodating cavity from the notch, so that the bus bar is attached to the surface, provided with the rough surface, of the conductive part, and the bus bar is connected with the diode. The arrangement of the rough surface ensures that the bus bar and the diode are in surface connection, and the tightness of the connection between the conductive piece and the bus bar is improved. And the condition that gaps appear in a welding contact surface due to metal springback caused by soldering tin flowing, unstable pressure and pressure withdrawing is avoided, and poor short circuit of the photovoltaic module is avoided.

Description

Technical Field

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

[0002] In the installation process of the junction box, currently, an insertion and locking structure has emerged on the market, that is, a bus bar is inserted into the box body and locked to the conductive module in the box body. However, due to metal material factors, the locking connection between the bus bar and the conductive module can only achieve line contact or even point contact, resulting in low conduction efficiency.

[0003] Therefore, a molten tin welding structure has also emerged on the market, that is, the bus bar is connected to the conductive module of the junction box by hot-melt soldering tin. During this process, the flow of the soldering tin, the instability of the pressure, and the metal rebound caused by the pressure withdrawal will all cause spatial gaps in the welding contact surface. In the development history of the photovoltaic module manufacturing industry, customer complaints about short circuits and even component burnout of photovoltaic modules caused by poor soldering of the junction box have never stopped. Summary of the Utility Model

[0004] Based on this, a junction box and a photovoltaic module are provided. The junction box is connected to the bus bar by fitting the rough surface of the conductive part, so that the bus bar is in surface contact with the conductive part, improving the connection effect between the bus bar and the conductive part and reducing the occurrence of short circuits and other situations.

[0005] For this purpose, in a first aspect, an embodiment of the present application provides a junction box, which is characterized by including: a box body provided with a receiving cavity, and the box body is provided with a notch for the bus bar to extend into; a diode located in the receiving cavity; a conductive part located in the receiving cavity and connected to the diode at one end, and the other end of the conductive part extends to the notch, and a rough surface is provided on the surface of the conductive part facing the notch, and the bus bar extends into the notch and one surface thereof is attached to the rough surface.

[0006] In one embodiment, the conductive part includes a first connection part, a guiding part, and a second connection part connected in sequence. The first connection part is connected to the diode, the guiding part is bent and the inner wall of the bend faces the notch, the guiding part is smooth, the second connection part is arranged parallel to the bottom wall of the box body, and the rough surface is located on the side of the second connection part facing the bottom wall of the box body.

[0007] In one embodiment, one end of the first connection part away from the diode extends towards the second connection part.

[0008] In one embodiment, the box body is provided with a support portion, the support portion is bent, the guiding portion is attached to the support portion, the support portion is further provided with a relief opening, and the first connecting portion extends into the relief opening and is connected to the conductive member.

[0009] In one embodiment, the support portion is provided with an embedding groove adapted to the guiding portion, and the guiding portion is embedded in the embedding groove.

[0010] In one embodiment, the second connecting portion is provided with a first mounting hole for corresponding to the second mounting hole of the bus bar.

[0011] In one embodiment, a support column is provided at the bottom wall of the box body corresponding to the second connecting portion, and the support column and the second connecting portion are spaced apart along the height direction of the box body to form an installation space for the bus bar to extend into.

[0012] In one embodiment, there are two notch openings respectively located at the positive and negative electrodes of the diode, and there are two conductive members respectively located at the two notch openings.

[0013] In a second aspect, an embodiment of the present application provides a photovoltaic module, including a bus bar and the junction box described in any one of the above.

[0014] In one embodiment, the bus bar is provided with a second mounting hole at one end for extending into the junction box, and the second mounting hole extends along the length direction of the bus bar.

[0015] According to the junction box and the photovoltaic module provided by the embodiments of the present application, the junction box includes a box body, a diode, and a conductive member. The box body is provided with a receiving cavity, and the box body is provided with a notch opening for the bus bar to extend into; the diode is located in the receiving cavity; the conductive member is located in the receiving cavity and one end is connected to the diode, and the other end of the conductive member extends to the notch opening. The surface of the conductive member facing the notch opening is provided with a rough surface, and the bus bar extends into the notch opening and one surface is attached to the rough surface. During installation, the bus bar is extended into the receiving cavity from the notch opening, so that the bus bar is attached to the surface of the conductive member provided with the rough surface, thereby connecting the bus bar to the diode. The setting of the rough surface in the present application ensures that the connection between the bus bar and the diode is a surface connection, improves the tightness of the connection between the conductive member and the bus bar, and does not cause a situation where a space gap appears in the welding contact surface due to the flow of solder, unstable pressure, and metal rebound caused by pressure withdrawal, avoiding short-circuit defects of the photovoltaic module. When repairing the junction box, compared with the tin soldering structure, the disassembly and assembly are simpler, and the disassembled parts can also be reused, improving the convenience of back-end maintenance. Description of the Drawings

[0016] Figure 1Shows a schematic structural diagram of a first junction box and a bus bar provided by an embodiment of the present application;

[0017] Figure 2 Shows a partial schematic diagram of a first junction box and a bus bar provided by an embodiment of the present application;

[0018] Figure 3 Shows a cross-sectional view of a first junction box and a bus bar provided by an embodiment of the present application;

[0019] Figure 4 Shows a schematic structural diagram of a first conductive member and a bus bar provided by an embodiment of the present application;

[0020] Figure 5 Shows a schematic structural diagram of a second junction box and a bus bar provided by an embodiment of the present application;

[0021] Figure 6 Shows a schematic structural diagram of a second conductive member and a bus bar provided by an embodiment of the present application;

[0022] Figure 7 Shows a partial schematic diagram of a second conductive member and a bus bar provided by an embodiment of the present application.

[0023] Description of reference numerals:

[0024] 1. Box body; 11. Notch; 12. Support part; 121. Embedding groove; 13. Support column; 131. Third mounting hole; 2. Diode; 3. Conductive member; 31. First connection part; 32. Guide part; 33. Second connection part; 331. First mounting hole; 4. Bus bar; 41. Second mounting hole. Detailed implementation manners

[0025] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0026] It should be noted that the illustrations provided in this embodiment only schematically illustrate the basic concept of the present invention. Therefore, only the components related to the present invention are shown in the drawings, rather than being drawn according to the number, shape and size of the components in actual implementation. The type, quantity and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0027] The structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the implementation conditions of the present utility model. Therefore, they do not have substantial technical significance. Any modification of the structure, change of the ratio relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope that the technical content disclosed by the present utility model can cover.

[0028] The orientation or positional relationships indicated in this specification, such as "upper", "lower", "left", "right", "middle", "longitudinal", "transverse", "horizontal", "inner", "outer", "radial", "circumferential", etc., are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] There has emerged a tin melting welding structure in the market, that is, the bus bar is connected to the conductive module of the junction box by hot melting solder adhesion. During this process, the metal rebound caused by the flow of solder, unstable pressure, and pressure withdrawal will all cause spatial gaps to appear in the welding contact surface.

[0030] In order to solve the above problems, Figure 1 Fig. shows a schematic structural diagram of a first junction box and a bus bar provided by an embodiment of the present application. Figure 2 Fig. shows a partial schematic diagram of a first junction box and a bus bar provided by an embodiment of the present application. Figure 3 Fig. shows a cross-sectional view of a first junction box and a bus bar provided by an embodiment of the present application. The present application provides a junction box, including a box body 1, a diode 2, and a conductive member 3. The box body 1 is provided with a receiving cavity, and the box body 1 is provided with a notch 11 for the bus bar 4 to extend into; the diode 2 is located in the receiving cavity; the conductive member 3 is located in the receiving cavity and one end is connected to the diode 2, the other end of the conductive member 3 extends to the notch 11, and a rough surface is provided on the surface of the conductive member 3 facing the notch 11. The bus bar 4 extends into the notch 11 and one surface thereof is attached to the rough surface.

[0031] It should be understood that the box body 1 is provided with a receiving chamber. The box body 1 may include an upper box body and a lower box body, and the upper box body and the lower box body can be connected by means such as snap connection, bonding, bolt fastener connection, etc. to form the receiving chamber. Among them, the shapes of the upper box body and the lower box body can be determined according to the actual situation, and the present application does not make any restrictions. The upper box body and the lower box body are hermetically connected to prevent the parts in the box body 1 from being affected by moisture and affecting the performance of the junction box. To ensure the sealing performance of the junction box, the box body 1 is sealed by potting. The insulating glue wraps circuit components such as the diode 2 in the box body 1 to isolate it from the external environment, prevent the circuit components from contacting water, and improve the safety of the junction box.

[0032] A notch 11 is formed in the bottom wall of the lower box body of the box body 1. The notch 11 penetrates the bottom wall of the lower box body of the box body 1 to facilitate the insertion of the bus bar 4. The present application does not limit the shape of the notch 11. In one example, the notch 11 is rectangular. The diode 2 is located in the receiving chamber. The function of the diode 2 is to make the current flow unidirectionally and prevent external current from flowing into the photovoltaic module, causing damage to the photovoltaic module. The diode 2 can be an axial diode or a module diode. The structure of the diode 2 can refer to the prior art and will not be elaborated here.

[0033] The conductive member 3 is located in the receiving chamber. The material of the conductive member 3 is a metal material, such as copper or other materials, and the present application does not make any restrictions. One end of the conductive member 3 is connected to the diode 2, and the other end is used to connect to the bus bar 4, thereby electrically connecting the bus bar 4 and the diode 2. Among them, the surface of the conductive member 3 facing the notch 11 is connected to the bus bar 4, and the surface of the conductive member 3 facing the notch 11 is a rough surface. In one example, the rough surface is a frosted surface. The setting of the rough surface can increase the friction between the conductive member 3 and the bus bar 4, thereby improving the tightness of the connection between the conductive member 3 and the bus bar 4. The shape of the conductive member 3 is not restricted here. The conductive member 3 can be in any shape, such as being bent, horizontally arranged or vertically arranged, etc.

[0034] During installation, the bus bar 4 is inserted into the receiving chamber through the notch 11, so that the bus bar 4 is in contact with the surface of the conductive member 3 provided with the rough surface, thereby connecting the bus bar 4 and the diode 2. Compared with the insertion locking structure in the present application, the setting of the rough surface ensures that the connection between the bus bar 4 and the diode 2 is a surface connection, improving the tightness of the connection between the conductive member 3 and the bus bar 4. Compared with the tin soldering structure, there will be no situation where spatial gaps appear in the welding contact surface due to the flow of solder, unstable pressure, and metal rebound caused by the withdrawal of pressure, avoiding short-circuit defects of the photovoltaic module. When repairing the junction box, compared with the tin soldering structure, the present application is simpler to disassemble and assemble, and the disassembled and assembled parts can also be reused, improving the convenience of backend maintenance.

[0035] Refer to Figures 1-4 , Figure 4The structural schematic diagram of the first conductive member and the bus bar provided by the embodiments of the present application is shown. In some alternative embodiments, the conductive member 3 includes a first connecting portion 31, a guiding portion 32, and a second connecting portion 33 connected in sequence. The first connecting portion 31 is connected to the diode 2. The guiding portion 32 is bent and the inner wall of the bend faces the notch 11. The guiding portion 32 is smooth. The second connecting portion 33 is arranged parallel to the bottom wall of the box body 1, and the rough surface is located on the side of the second connecting portion 33 facing the bottom wall of the box body.

[0036] The first connecting portion 31, the guiding portion 32, and the second connecting portion 33 are made of the same material. The first connecting portion 31, the guiding portion 32, and the second connecting portion 33 are integrally formed, or can also be connected by means such as fusion welding and soldering. One end of the first connecting portion 31 is connected to the diode 2. In order to improve the connection effect between the first connecting portion 31 and the diode 2, there are two first connecting portions 31 and they are located on both sides of the guiding portion 32. The guiding portion 32 is bent and one end is connected to the first connecting portion 31. The inner wall of the bend of the guiding portion 32 faces the notch 11. When the bus bar 4 passes through the bent guiding portion 32, the bus bar 4 deforms. The second connecting portion 33 is connected to the end of the guiding portion 32 facing away from the first connecting portion 31, and the second connecting portion 33 is arranged parallel to the bottom wall of the box body 1.

[0037] When installing the bus bar, one end of the bus bar 4 is inserted into the notch in a vertical state, and at the same time, pressure is applied to the bus bar 4 so that the bus bar 4 deforms in the guiding portion 32. The bus bar 4 passing through the guiding portion 32 is bent and deformed so that the end of the bus bar 4 extending below the second connecting portion 33 is horizontally arranged. By arranging the guiding portion 32 to make the bus bar 4 deform under force, compared with the bus bar 4 directly attaching to the conductive member 3, the deformed bus bar 4 fits better with the second connecting portion 33. The present application further improves the tightness of the connection between the second connecting portion 33 and the bus bar 4 and improves the conductive effect.

[0038] Wherein, the surface of the guiding portion 32 facing the bottom wall of the box body 1 is smooth, so as to facilitate the bus bar 4 to pass through the guiding portion 32 smoothly and not hinder the bus bar 4 from extending into the accommodating chamber of the box body 1. The rough surface is arranged on the side of the second connecting portion 33 facing the bottom wall of the box body 1, and the arrangement of the rough surface improves the tightness of the connection between the second connecting portion 33 and the bus bar 4.

[0039] In some alternative embodiments, the end of the first connecting portion 31 away from the diode 2 extends towards the second connecting portion 33. The end of the first connecting portion 31 extending towards the second connecting portion 33 is connected to the bottom wall of the box body 1. The arrangement of the first connecting portion 31 makes the included angle between the guiding portion 32 and the end of the first connecting portion 31 away from the diode 2 an acute angle, that is, the first connecting portion 31 can further support the guiding portion 32 and the second connecting portion 33 and reduce the probability of deformation at the connection between the first connecting portion 31 and the guiding portion 32.

[0040] In some alternative embodiments, the box body 1 is provided with a support portion 12. The support portion 12 is bent, and the guiding portion 32 is attached to the support portion 12. The box body 1 and the support portion 12 can be connected by a fixed form or a detachable connection method, which is not limited in this application. In one example, the material of the support portion 12 is the same as that of the box body 1, and the support portion 12 and the box body 1 are integrally formed.

[0041] The support portion 12 is bent and located at the notch 11. The guiding portion 32 is located inside the support portion 12 and attached to the support portion 12 to support the guiding portion 32. When the bus bar 4 deforms under force at the guiding portion 32, the setting of the support portion 12 can increase the strength of the guiding portion 32 and prevent the guiding portion 32 from deforming. Among them, the second connecting portion 33 extends out of the inner cavity of the support portion 12, which is convenient for subsequent operations.

[0042] In some alternative embodiments, the support portion 12 is provided with an embedding groove 121 adapted to the guiding portion 32, and the guiding portion 32 is embedded in the embedding groove 121. The embedding groove 121 is located inside the support portion 12 and extends along the extending direction of the support portion 12. During installation, the guiding portion 32 of the conductive member 3 is snapped into the embedding groove 121, so that the connection between the guiding portion 32 and the support portion 12 is closer, improving the supporting effect of the support portion 12 on the guiding portion 32 and reducing the probability of the guiding portion 32 and the support portion 12 falling off.

[0043] In order not to affect the connection between the guiding portion 32 and the first connecting portion 31, the support portion 12 is provided with an avoidance groove for avoiding the first connecting portion 31, and the first connecting portion 31 is located in the avoidance groove.

[0044] Refer to Figures 5-7 , Figure 5 which shows a schematic structural diagram of a second junction box and a bus bar provided by an embodiment of the present application, Figure 6 which shows a schematic structural diagram of a second conductive member and a bus bar provided by an embodiment of the present application, Figure 7 which shows a partial schematic diagram of a second conductive member and a bus bar provided by an embodiment of the present application.

[0045] In some alternative embodiments, the second connecting portion 33 is provided with a first mounting hole 331 for corresponding to the second mounting hole 41 of the bus bar 4. The first mounting hole 331 penetrates along the thickness direction of the second connecting portion 33. The present application does not limit the shape of the first mounting hole 331, and the first mounting hole 331 can be circular, square, strip-shaped or other shapes. When the bus bar 4 is attached to the second connecting portion 33, the first mounting hole 331 corresponds to the second mounting hole 41. At this time, a fixing member can pass through the first mounting hole 331 and the second mounting hole 41 to connect the second connecting portion 33 and the bus bar 4. To facilitate the connection between the first mounting hole 331 and the second mounting hole 41, the first mounting hole 331 is located at one end of the second connecting portion 33 extending out of the embedding groove 121.

[0046] The setting of the first mounting hole 331, the second mounting hole 41 and the fixing member can further improve the connection tightness between the second connecting portion 33 and the bus bar 4, and also avoid the disconnection between the second connecting portion 33 and the bus bar 4 due to jolting or other situations during transportation.

[0047] In some alternative embodiments, a support column 13 is provided on the bottom wall of the box body 1 corresponding to the second connecting portion 33. The support column 13 and the second connecting portion 33 are spaced apart along the height direction of the box body 1 to form a mounting space for the bus bar 4 to extend into. When the bus bar 4 extends into the mounting space, the support column 13 can support the bus bar 4, improving the connection tightness between the second connecting portion 33 and the bus bar 4, and also avoiding the disconnection between the second connecting portion 33 and the bus bar 4 due to jolting or other situations during transportation.

[0048] Among them, the support column 13 is further provided with a third mounting hole 131 which is correspondingly arranged with the first mounting hole 331. When the bus bar 4 is located in the mounting space, the fixing member can pass through the first mounting hole 331, the second mounting hole 41 and extend into the third mounting hole 131. The third mounting hole 131 can be a threaded hole, and the fixing member can be a metal conductive member such as a screw to connect the second connecting portion 33, the bus bar 4 and the support column 13, further avoiding the disconnection between the second connecting portion 33 and the bus bar 4 due to jolting or other situations during transportation.

[0049] In some alternative embodiments, there are two notches 11 which are respectively located at the positive and negative electrodes of the diode 2, and there are two conductive members 3 which are respectively located at the two notches 11. Since the diode 2 has positive and negative electrodes, two conductive members 3 are required. The two conductive members 3 are symmetrically arranged on the opposite sides of the diode 2. One conductive member 3 is connected to the positive terminal of the diode 2, and the other conductive member 3 is connected to the negative terminal of the diode 2. One end of one conductive member 3 facing away from the diode 2 is connected to a wiring terminal, and the wiring terminal is used to lead out the current transmitted by the bus bar 4. Generally, copper is selected as the raw material for the wiring terminal, so that it has good electrical conductivity, heat dissipation, ductility and sufficient mechanical strength.

[0050] Since there are two conductive members 3 which respectively correspond to the positive and negative electrodes of the diode 2, and the two conductive members 3 are respectively connected to a bus bar 4, in order to enable each bus bar 4 to extend into the accommodation chamber to be connected to the second connection portion 33 of the conductive member 3, the bending directions of the guiding portions 32 of the two conductive members 3 are away from each other, so that the extending directions of the two bus bars 4 are opposite, thereby reducing the material consumption of the conductive member 3.

[0051] This application further includes a photovoltaic module, and the photovoltaic module includes a bus bar 4 and the junction box described in any one of the above. The junction box includes a box body 1, a diode 2 and a conductive member 3. The box body 1 is provided with an accommodation chamber, and the box body 1 is provided with a notch 11 for the bus bar 4 to extend into; the diode 2 is located in the accommodation chamber; the conductive member 3 is located in the accommodation chamber and one end is connected to the diode 2, and the other end of the conductive member 3 extends to the notch 11. A rough surface is provided on the surface of the conductive member 3 facing the notch 11, and the bus bar 4 extends into the notch 11 and one surface thereof is attached to the rough surface.

[0052] In this application, the bus bar 4 extends into the accommodation chamber from the notch 11, so that the bus bar 4 is attached to the surface of the conductive member 3 provided with the rough surface, thereby connecting the bus bar 4 to the diode 2. Compared with the insertion-locking structure, the setting of the rough surface ensures that the connection between the bus bar 4 and the diode 2 is a surface connection, improving the tightness of the connection between the conductive member 3 and the bus bar 4. Compared with the tin soldering structure, there will be no situation where spatial gaps appear in the welding contact surface due to the flow of solder, unstable pressure and metal rebound caused by the withdrawal of pressure, avoiding short-circuit defects of the photovoltaic module. When repairing the junction box, compared with the tin soldering structure, the disassembly and assembly are simpler, and the disassembled parts can also be reused, improving the convenience of backend maintenance.

[0053] In some alternative embodiments, the bus bar 4 is provided with a second mounting hole 41 at one end for extending into the junction box, and the second mounting hole 41 extends along the length direction of the bus bar 4. The second mounting hole 41 is arranged in a long strip shape, which increases the probability of alignment and communication between the first mounting hole 331 and the second mounting hole 41, so that the fixing member can pass through the first mounting hole 331 and the second mounting hole 41 to connect the bus bar 4 with the second connecting portion 33, further improving the convenience of connecting the bus bar 4 with the second connecting portion 33.

[0054] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0055] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A junction box, characterized in that, Comprising: A box body (1) provided with a receiving chamber, and the box body (1) is provided with a notch (11) for a bus bar (4) to extend into; A diode (2) located within the receiving chamber; A conductive member (3) located within the receiving chamber and having one end connected to the diode (2), the other end of the conductive member (3) extending to the notch (11), and a rough surface is provided on a surface of the conductive member (3) facing the notch (11), and the bus bar (4) extends into the notch (11) and one surface thereof is in contact with the rough surface.

2. The junction box according to claim 1, characterized in that, The conductive member (3) includes a first connecting portion (31), a guiding portion (32), and a second connecting portion (33) connected in sequence. The first connecting portion (31) is connected to the diode (2), the guiding portion (32) is bent and the inner wall of the bend faces the notch (11), the guiding portion (32) is smooth, the second connecting portion (33) is arranged parallel to the bottom wall of the box body (1), and the rough surface is located on a side of the second connecting portion (33) facing the bottom wall of the box body (1).

3. The junction box according to claim 2, wherein, One end of the first connecting portion (31) away from the diode (2) extends towards the second connecting portion (33).

4. The junction box according to claim 2, characterized in that, The box body (1) is provided with a supporting portion (12), the supporting portion (12) is bent, and the guiding portion (32) is in contact with the supporting portion (12).

5. The junction box according to claim 4, wherein, The supporting portion (12) is provided with an embedding groove (121) adapted to the guiding portion (32), and the guiding portion (32) is embedded in the embedding groove (121).

6. The junction box according to claim 2, characterized in that, The second connecting portion (33) is provided with a first mounting hole (331), and the first mounting hole (331) is used to correspond to a second mounting hole (41) of the bus bar (4).

7. The junction box according to claim 2, characterized in that A supporting column (13) is provided at the bottom wall of the box body (1) corresponding to the second connecting portion (33), and the supporting column (13) and the second connecting portion (33) are spaced apart along the height direction of the box body (1) to form a mounting space for the bus bar (4) to extend into.

8. The junction box according to claim 1, characterized in that, There are two notches (11) which are respectively located at the positive and negative poles of the diode (2), and there are two conductive members (3) which are respectively located at the two notches (11).

9. A photovoltaic module, characterized in that, Including a bus bar (4) and a junction box according to any one of claims 1-8.

10. The photovoltaic module according to claim 9, characterized in that, One end of the bus bar (4) for extending into the junction box is provided with a second mounting hole (41), and the second mounting hole (41) extends along the length direction of the bus bar (4).

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