Photovoltaic junction box

Abstract

The utility model discloses a photovoltaic junction box, which comprises a box body and a box cover, the box body and the box cover are matched with each other and form an accommodating cavity, one or more partition plates are arranged in the accommodating cavity, and the partition plates are configured to divide the accommodating cavity into at least one first accommodating cavity and at least one second accommodating cavity; the first containing cavity is configured to contain a circuit device, the second containing cavity is configured to contain a cable, one end of the cable is configured to penetrate through the partition plate and be connected with the circuit device, and the other end of the cable is configured to penetrate through the cavity wall of the second containing cavity and extend to the outside of the photovoltaic junction box; the first accommodating cavity is configured to be filled with a first sealant, the second accommodating cavity is configured to be filled with a second sealant, and the hardness of the second sealant is greater than that of the first sealant. The photovoltaic junction box provided by the utility model is small in adverse effect caused by thermal expansion and cold contraction, and has reliable electrical performance and long service life due to the wrapping property and durability of the sealant on the cable.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, in particular to a photovoltaic junction box. Background Art

[0002] The photovoltaic junction box, especially the photovoltaic shutdown junction box, is a specially designed junction box used in solar photovoltaic systems to provide additional safety functions. The junction box integrates a rapid shutdown function that can quickly cut off the electrical connection between the photovoltaic array and the inverter or the grid when a specific situation is detected (such as grid failure, fire, maintenance or emergency) to ensure personnel safety and system reliability. The photovoltaic shutdown junction box is connected to other components through cables.

[0003] The potting of photovoltaic junction boxes is an important part of the photovoltaic module manufacturing process. It is to pour special colloid materials inside the photovoltaic junction box to enhance the protection and durability of the junction box. The main purpose of potting glue is: Sealing protection: the potting glue can completely fill the gaps in the junction box to form a closed protective layer, effectively preventing moisture, dust and other external pollutants from entering the junction box, protecting the internal electrical components from damage, and extending the service life of the junction box and the entire photovoltaic module. Choosing the right potting glue is crucial to the quality of the photovoltaic junction box. This is not only related to the reliability and safety of photovoltaic modules, but also one of the important factors to ensure the long-term stable operation of photovoltaic power stations.

[0004] The disclosure of the above background technology content is only used to assist in understanding the concept and technical solution of the utility model. It does not necessarily belong to the prior art of the present application, nor does it necessarily provide technical guidance. In the absence of clear evidence that the above content has been disclosed before the filing date of the present application, the above background technology should not be used to evaluate the novelty and creativity of the present application. Utility Model Content

[0005] The purpose of the utility model is to provide a photovoltaic junction box, which can reduce the influence of thermal expansion and contraction on the junction box while ensuring that the sealant has a long-lasting and good wrapping property on the cable, thereby improving the reliability and life of the electrical performance of the photovoltaic junction box.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A photovoltaic junction box, comprising a box body and a box cover, wherein the box body and the box cover cooperate with each other to form a receiving cavity, wherein one or more partitions are arranged in the receiving cavity, and the partitions are configured to separate the receiving cavity into at least one first receiving cavity and at least one second receiving cavity;

[0008] The first accommodating cavity is configured to accommodate a circuit device, and the second accommodating cavity is configured to accommodate a cable, one end of the cable is configured to pass through the partition and be connected to the circuit device, and the other end of the cable is configured to pass through the cavity wall of the second accommodating cavity and extend to the outside of the photovoltaic junction box;

[0009] The first accommodating cavity is configured to be filled with a first sealant, and the second accommodating cavity is configured to be filled with a second sealant, and the hardness of the second sealant is greater than the hardness of the first sealant.

[0010] Further, based on any one of the technical solutions or a combination of multiple technical solutions mentioned above, the number of the partitions is two, the two partitions are arranged in parallel and divide the accommodating chamber into the second accommodating chamber, the first accommodating chamber and the second accommodating chamber from left to right.

[0011] Further, based on any one of the above technical solutions or a combination of multiple technical solutions, a first clamping assembly is arranged in the second accommodating cavity, and the first clamping assembly includes a first clamping plate and a second clamping plate arranged opposite to each other;

[0012] One side of the first clamping plate is connected to the inner wall of the box body, and the other side thereof extends into the second accommodating cavity and is provided with a first groove;

[0013] One side of the second clamping plate is connected to the inner wall of the box cover, and the other side thereof extends into the second accommodating cavity and is provided with a second groove;

[0014] When the box body and the box cover are matched with each other, the first groove and the second groove are arranged opposite to each other, and the cable is arranged between the first groove and the second groove.

[0015] Further, based on any one of the technical solutions or a combination of multiple technical solutions mentioned above, the number of the cables arranged in a second accommodating cavity is one or more, each of the cables is cooperatively connected with one or more of the first snap-fit ​​components, and gaps are arranged between the multiple first snap-fit ​​components.

[0016] Further, based on any one of the above technical solutions or a combination of multiple technical solutions, the partition includes a first partition and a second partition that are arranged opposite to each other, the first partition is connected to the inner wall of the box body, and the other side of the first partition extends into the accommodating cavity and is provided with a third groove;

[0017] One side of the second partition is connected to the inner wall of the box cover, and the other side thereof extends into the accommodating cavity and is provided with a fourth groove;

[0018] When the box body and the box cover cooperate with each other, the first partition plate and the second partition plate are in abutment connection, the third groove and the fourth groove are arranged opposite to each other and form a first through hole, and the cable is configured to pass through the first through hole.

[0019] Further, based on any one of the above technical solutions or a combination of multiple technical solutions, the box body includes a first extension portion, the first extension portion includes a fifth groove communicating with the second accommodating cavity; the box cover includes a second extension portion, the second extension portion includes a sixth groove communicating with the second accommodating cavity;

[0020] When the box body and the box cover cooperate with each other, the first extension portion is connected with the second extension portion, and the fifth groove and the sixth groove are arranged opposite to each other and form a second through hole communicating with the second accommodating cavity;

[0021] The cable is configured to pass through the second through hole and extend to the outside of the photovoltaic junction box.

[0022] Further, based on any one of the above technical solutions or a combination of multiple technical solutions, a positioning column is provided in the first accommodating cavity, one end of the positioning column is fixedly connected to the box body or the box cover, and the other end thereof is configured to be detachably connected to the circuit device; and / or,

[0023] One or more supporting members are arranged in the first accommodating cavity, one end of the supporting member is fixedly connected to the box body or the box cover, and the other end thereof is configured to be in abutting connection or detachable connection with the circuit device.

[0024] Furthermore, any one of the above-mentioned technical solutions or a combination of multiple technical solutions further comprises a clamping assembly, wherein the clamping assembly comprises a clamping hook and a clamping slot;

[0025] The hook and the slot are two parts, one of which is arranged on the box body and the other is arranged on the box cover;

[0026] When the box body and the box cover cooperate with each other, the hook is engaged in the slot.

[0027] Further, based on any one of the technical solutions or a combination of multiple technical solutions mentioned above, the box cover is provided with a first glue filling hole, a second glue filling hole and an exhaust hole, the first accommodating cavity is connected to the outside of the photovoltaic junction box through the first glue filling hole and the exhaust hole, and the second accommodating cavity is also connected to the outside of the photovoltaic junction box through the second glue filling hole and the exhaust hole.

[0028] Furthermore, any one of the technical solutions or a combination of multiple technical solutions described above further includes a dust plug, and the dust plug is configured to be sealed and connected to the first glue filling hole and the second glue filling hole respectively.

[0029] The beneficial effects brought by the technical solution provided by the utility model are as follows:

[0030] a. The utility model provides different accommodating cavities for circuit components and cables, and fills soft glue in the first accommodating cavity for accommodating circuit components, and fills hard glue in the second accommodating cavity for accommodating cables. This can reduce the adverse effects of thermal expansion and contraction on the junction box, while ensuring that the sealant has a long-lasting and good wrapping property for the cable, thereby improving the reliability and life of the electrical performance of the photovoltaic junction box;

[0031] b. The photovoltaic junction box provided by the utility model has a simple structure, is easy to assemble and glue, and has a low manufacturing cost;

[0032] c. The utility model can further prevent the junction box from being affected by dust and water by providing a sealing plug that is sealed to the glue injection hole and a first extension part and a second extension part for the cable to pass through. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 A schematic structural diagram of a photovoltaic junction box at a first angle provided by an exemplary embodiment of the utility model;

[0035] Figure 2 A schematic structural diagram of a photovoltaic junction box at a second angle provided by an exemplary embodiment of the utility model;

[0036] Figure 3 A schematic diagram of the structure of a box body provided for an exemplary embodiment of the utility model;

[0037] Figure 4 A schematic structural diagram of a box cover at a first angle provided by an exemplary embodiment of the utility model;

[0038] Figure 5 A schematic structural diagram of a box cover at a second angle provided for an exemplary embodiment of the utility model.

[0039] Among them, the figure marks include: 1-box body, 11-first partition, 111-third groove, 12-first extension part, 121-fifth groove, 13-first clamping plate, 131-first groove, 14-positioning column, 15-support member, 161-hook, 2-box cover, 21-second partition, 211-fourth groove, 22-second extension part, 221-sixth groove, 23-second clamping plate, 231-second groove, 241-first glue filling hole, 242-second glue filling hole, 25-exhaust hole, 261-card slot, 31-first accommodating cavity, 32-second accommodating cavity, 4-circuit device, 5-cable. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0041] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, device, product or equipment that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0042] If hard glue is filled in the photovoltaic junction box, the stability of the circuit board in the junction box will be affected because the hard glue is greatly affected by thermal expansion and contraction. Therefore, at present, photovoltaic junction boxes are mostly filled with soft glue, but the soft glue cannot wrap the cables well, and gaps will be generated between the cables, causing water vapor to enter the photovoltaic junction box and affect its electrical performance. In order to solve the above technical problems, the utility model proposes a photovoltaic junction box, which respectively provides different accommodating cavities for circuit devices such as circuit boards and integrated chips and cables, and fills soft glue in the accommodating cavity of the circuit device, and fills hard glue in the accommodating cavity of the cable. This can reduce the impact of thermal expansion and contraction on the junction box while ensuring that the sealant has a long-lasting and good wrapping property for the cable, thereby improving the reliability and life of the electrical performance of the photovoltaic junction box.

[0043] In one embodiment of the present invention, a photovoltaic junction box is provided. Figures 1 to 5 The photovoltaic junction box comprises a box body 1 and a box cover 2, wherein the box body 1 and the box cover 2 cooperate with each other to form a receiving cavity, wherein one or more partitions are arranged in the receiving cavity, and the partitions are configured to separate the receiving cavity into at least one first receiving cavity 31 and at least one second receiving cavity 32;

[0044] The first accommodating cavity 31 is configured to accommodate a circuit device 4, and the circuit device 4 includes a PCB circuit board and a chip-type integrated circuit, etc. The second accommodating cavity 32 is configured to accommodate a cable 5, and one end of the cable 5 is configured to pass through the partition and be connected to the circuit device 4, and the other end of the cable 5 is configured to pass through the cavity wall of the second accommodating cavity 32 and extend to the outside of the photovoltaic junction box;

[0045] The first accommodating cavity 31 is configured to be filled with a first sealant, and the second accommodating cavity 32 is configured to be filled with a second sealant. The hardness of the first sealant is greater than the hardness of the second sealant.

[0046] The utility model solves the above-mentioned problems existing in the prior art by providing different accommodating cavities for circuit components and cables, respectively, filling soft glue in the first accommodating cavity for accommodating circuit components, and filling hard glue in the second accommodating cavity for accommodating cables. The first sealant and the second sealant are both potting glue with excellent flame retardancy and thermal conductivity. Preferably, the soft glue is Huitian's HT-5296N glue, and the hard glue is Huitian's HT-5299W glue.

[0047] In one embodiment of the present invention, the number of the partitions is specifically two, and the two partitions are arranged in parallel and divide the accommodating chamber into the second accommodating chamber 32, the first accommodating chamber 31 and the second accommodating chamber 32 from left to right. Figure 1 and Figure 2 As shown, a first accommodating cavity 31 for accommodating the circuit device 4 is provided in the middle of the photovoltaic junction box, and second accommodating cavities 32 for accommodating the cables 5 are provided on both sides of the photovoltaic junction box, and parts of the cables 5 on both sides are accommodated in the second accommodating cavities 32, and one end of the cable 5 passes through the partition to be connected with the circuit device 4, and the other end of the cable 5 passes through the box body and the box cover of the photovoltaic junction box and extends to the outside.

[0048] See also Figures 1 to 4, the photovoltaic junction box is provided with extensions for supporting the cable 5 on both sides. Specifically, the box body 1 includes a first extension 12, the first extension 12 includes a fifth groove 121 communicating with the second accommodating cavity 32; the box cover 2 includes a second extension 22, the second extension 22 includes a sixth groove 221 communicating with the second accommodating cavity 32. When the box body 1 and the box cover 2 cooperate with each other, the first extension 12 is connected with the second extension 22, the fifth groove 121 and the sixth groove 221 are arranged oppositely and form a second through hole communicating with the second accommodating cavity 32. The cable 5 is configured to pass through the second through hole and extend to the outside of the photovoltaic junction box. The design of the extension not only plays a role in positioning the cable and facilitating the assembly of the cable and the box body, but also has a more important role in extending the length of the hard glue wrapping the cable 5, further improving the reliability of the electrical performance of the photovoltaic junction box.

[0049] See also Figure 2 and Figure 3 , the partition includes a first partition 11 and a second partition 21. The first partition 11 is arranged in the box body 1, and is preferably a structure integrally formed with the box body 1, such as integrally formed by injection molding. The first partition 11 extends into the accommodating cavity and is provided with a third groove 111 on a side close to the box cover 2. The second partition 21 is arranged in the box cover 2, and is preferably a structure integrally formed with the box cover 2, such as integrally formed by injection molding. The second partition 21 extends into the accommodating cavity and is provided with a fourth groove 211 on a side close to the box body 1. When the box body 1 and the box cover 2 cooperate with each other, the first partition 11 and the second partition 21 are in contact with each other to form the partition, the third groove 111 and the fourth groove 211 are arranged opposite to each other and form a first through hole, and the cable 5 is configured to pass through the first through hole and be connected with the circuit device 4.

[0050] In order to improve the support of the cable 5 and place the cable in the middle of the second accommodating cavity 32 to prevent it from sticking to the wall of the junction box due to improper grouting or installation, in one embodiment of the utility model, a first clamping assembly is arranged in the second accommodating cavity 32 to support and assemble the cable 5. Figure 2 and Figure 3, the first clamping assembly includes a first clamping plate 13 and a second clamping plate 23 that are arranged opposite to each other. One side of the first clamping plate 13 is connected to the inner wall of the box body 1, and the other side thereof extends into the second accommodating cavity 32 and is provided with a first groove 131. One side of the second clamping plate 23 is connected to the inner wall of the box cover 2, and the other side thereof extends into the second accommodating cavity 32 and is provided with a second groove 231. When the box body 1 and the box cover 2 cooperate with each other, the first groove 131 and the second groove 231 are arranged opposite to each other, and the cable 5 is arranged between the first groove 131 and the second groove 231. It should be noted that when the box body 1 and the box cover 2 cooperate with each other, the first clamping plate 13 and the second clamping plate 23 can be in contact with each other, or a certain gap can be provided.

[0051] The number of the cables 5 accommodated in each second accommodating cavity 32 can be one or more, which is specifically set according to actual use requirements. If the number of the cables 5 is more than one, preferably, the multiple cables 5 are arranged side by side, and multiple first clamping components are correspondingly arranged, and the first clamping components are arranged correspondingly to the cables 5, that is, each cable 5 is supported by one or more first clamping components. Gaps need to be set between the multiple first clamping components to increase the amount of glue poured into the second accommodating cavity 32 and ensure that the glue can flow smoothly in the second accommodating cavity 32 during the glue pouring process.

[0052] In order to facilitate the assembly of the circuit device 4, improve the support for the circuit device 4, and place the circuit device 4 in the middle of the first accommodating cavity 31, it is prevented from sticking to the box wall of the junction box and affecting its electrical performance during use. In one embodiment of the utility model, one or more positioning columns 14 and one or more support members 15 are provided in the first accommodating cavity 31, and the circuit device 4 is limited and supported by the positioning columns 14 and the support members 15. One end of the positioning column 14 is fixedly connected to the box body 1 or the box cover 2, and the other end thereof is configured to be detachably connected to the circuit device 4; one end of the support member 15 is fixedly connected to the box body 1 or the box cover 2, and the other end thereof is configured to be in contact with or detachably connected to the circuit device 4.

[0053] See also Figure 3 In a specific embodiment of the utility model, the circuit device is fixed in the box body 1, and positioning columns 14 and support members 15 are provided on both sides of the first accommodating cavity 31 in the middle of the box body 1. The positioning columns 14 are configured to be inserted into the positioning holes on the circuit device 4, and the upper end surface of the support member 15 is configured to be in contact with the bottom surface of the circuit device 4.

[0054] In one embodiment of the utility model, the box body 1 and the box cover 2 are connected by a snap-fit ​​assembly, and the snap-fit ​​assembly has various structural forms. For example, the snap-fit ​​assembly includes a hook 161 and a slot 261, and the hook 161 and the slot 261 are two parts, one of which is arranged on the box body 1 and the other is arranged on the box cover 2; when the box body 1 and the box cover 2 cooperate with each other, the hook 161 is snap-fitted into the slot 261. Figure 2 and Figure 3 , a clamping member including the clamping hook 161 is provided inside the two sides of the box body 1, and the clamping member extends in the up-down direction, and one end of the clamping member is fixedly connected to the box body 1, and the other end is provided with the clamping hook 161. Correspondingly, a matching portion capable of matching and engaging with the clamping hook 161 is provided on both sides of the box cover 2, and the matching portion is a stepped groove provided on the inner side wall of the box cover 2, and the groove extends to the inside of the side wall of the box cover 2 to form the clamping groove 261.

[0055] In one embodiment of the present invention, see Figure 5 , the box cover 2 is provided with a first glue injection hole 241, a second glue injection hole 242 and an exhaust hole 25. The position of the first glue injection hole 241 is relative to the position of the first accommodating chamber 31, and the first accommodating chamber 31 is connected to the outside of the photovoltaic junction box through the first glue injection hole 241, and is connected to the outside of the photovoltaic junction box through the exhaust hole 25. Preferably, the first glue injection hole 241 is arranged in the middle part of the position of the box cover 2 corresponding to the first accommodating chamber 31, and there are 4 exhaust holes 25, which are arranged at the four corners of the position of the box cover 2 corresponding to the first accommodating chamber 31. The second accommodating chamber 32 is connected to the outside of the photovoltaic junction box through the second glue injection hole 242, and is connected to the outside of the photovoltaic junction box through the exhaust hole 25. The aperture of the first glue injection hole 241 and the aperture of the second glue injection hole 242 may be the same or different. Specifically, the aperture size of the first glue injection hole 241 matches the volume size of the first accommodating cavity 31, and the aperture size of the second glue injection hole 242 matches the volume size of the second accommodating cavity 32. The larger the volume of the first accommodating cavity 31, the larger the aperture size of the first glue injection hole 241; the larger the volume of the second accommodating cavity 32, the larger the aperture size of the second glue injection hole 242, so as to increase the glue injection speed of each accommodating cavity and improve production efficiency.

[0056] In another embodiment of the utility model, the difference from the above embodiment is that the number of the partition is one, that is, the accommodating cavity is divided by one partition, the first accommodating cavity 31 is formed on one side of the partition, and the second accommodating cavity 32 is formed on the other side thereof. That is, in this embodiment, the photovoltaic junction box is specifically a two-cavity structure, one cavity is used to accommodate circuit components such as circuit boards and integrated chips and is filled with soft glue, and the other cavity is used to accommodate cables and is filled with hard glue.

[0057] The box body and the box cover of the photovoltaic junction box in the above-mentioned embodiments can be integrally formed by injection molding, so that the manufacturing cost of the photovoltaic junction box is low and it is convenient to assemble cables, circuit components and potting glue.

[0058] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0059] The above is only a specific implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A photovoltaic junction box, characterized in that: The invention comprises a box body (1) and a box cover (2), wherein the box body (1) and the box cover (2) cooperate with each other to form a receiving cavity, wherein one or more partitions are arranged in the receiving cavity, and the partitions are configured to separate the receiving cavity into at least one first receiving cavity (31) and at least one second receiving cavity (32); The first accommodating cavity (31) is configured to accommodate a circuit device (4), the second accommodating cavity (32) is configured to accommodate a cable (5), one end of the cable (5) is configured to pass through the partition and be connected to the circuit device (4), and the other end of the cable (5) is configured to pass through the cavity wall of the second accommodating cavity (32) and extend to the outside of the photovoltaic junction box; The first accommodating cavity (31) is configured to be filled with a first sealant, and the second accommodating cavity (32) is configured to be filled with a second sealant, wherein the hardness of the second sealant is greater than the hardness of the first sealant.

2. The photovoltaic junction box according to claim 1, characterized in that: There are two partitions, which are arranged in parallel and divide the accommodating chamber into the second accommodating chamber (32), the first accommodating chamber (31) and the second accommodating chamber (32) from left to right.

3. The photovoltaic junction box according to claim 1, characterized in that: A first clamping assembly is disposed in the second accommodating cavity (32), wherein the first clamping assembly comprises a first clamping plate (13) and a second clamping plate (23) which are arranged opposite to each other; One side of the first clamping plate (13) is connected to the inner wall of the box body (1), and the other side thereof extends into the second accommodating cavity (32) and is provided with a first groove (131); One side of the second clamping plate (23) is connected to the inner wall of the box cover (2), and the other side thereof extends into the second accommodating cavity (32) and is provided with a second groove (231); When the box body (1) and the box cover (2) are matched with each other, the first groove (131) and the second groove (231) are arranged opposite to each other, and the cable (5) is arranged between the first groove (131) and the second groove (231).

4. The photovoltaic junction box according to claim 3, characterized in that: The number of the cables (5) arranged in one of the second accommodating chambers (32) is one or more, each of the cables (5) is cooperatively connected with one or more of the first snap-fit ​​components, and gaps are arranged between the plurality of the first snap-fit ​​components.

5. The photovoltaic junction box according to claim 1, characterized in that: The partition comprises a first partition (11) and a second partition (21) which are arranged opposite to each other, the first partition (11) being connected to the inner wall of the box body (1), and the other side of the first partition (11) extending into the accommodating cavity and being provided with a third groove (111); One side of the second partition plate (21) is connected to the inner wall of the box cover (2), and the other side thereof extends into the accommodating cavity and is provided with a fourth groove (211); When the box body (1) and the box cover (2) are matched with each other, the first partition (11) and the second partition (21) are abutted and connected, the third groove (111) and the fourth groove (211) are arranged opposite to each other and form a first through hole, and the cable (5) is configured to pass through the first through hole.

6. The photovoltaic junction box according to claim 1, characterized in that: The box body (1) comprises a first extension portion (12), the first extension portion (12) comprises a fifth groove (121) communicating with the second accommodating cavity (32); the box cover (2) comprises a second extension portion (22), the second extension portion (22) comprises a sixth groove (221) communicating with the second accommodating cavity (32); When the box body (1) and the box cover (2) are matched with each other, the first extension portion (12) is matched with the second extension portion (22) to be connected, and the fifth groove (121) and the sixth groove (221) are arranged opposite to each other and form a second through hole communicating with the second accommodating cavity (32); The cable (5) is configured to pass through the second through hole and extend to the outside of the photovoltaic junction box.

7. The photovoltaic junction box according to claim 1, characterized in that: A positioning column (14) is provided in the first accommodating cavity (31), one end of the positioning column (14) is fixedly connected to the box body (1) or the box cover (2), and the other end thereof is configured to be detachably connected to the circuit device (4); and / or, One or more support members (15) are arranged in the first accommodating cavity (31), one end of the support member (15) is fixedly connected to the box body (1) or the box cover (2), and the other end is configured to be in abutting connection or detachable connection with the circuit device (4).

8. The photovoltaic junction box according to claim 1, characterized in that: It also includes a card connection assembly, the card connection assembly including a card hook (161) and a card slot (261); The hook (161) and the slot (261) are two parts, one of which is arranged on the box body (1) and the other is arranged on the box cover (2); When the box body (1) and the box cover (2) cooperate with each other, the hook (161) is engaged in the slot (261).

9. The photovoltaic junction box according to claim 1, characterized in that: The box cover (2) is provided with a first glue injection hole (241), a second glue injection hole (242) and an exhaust hole (25); the first accommodating cavity (31) is connected to the outside of the photovoltaic junction box via the first glue injection hole (241) and the exhaust hole (25); the second accommodating cavity (32) is also connected to the outside of the photovoltaic junction box via the second glue injection hole (242) and the exhaust hole (25).

10. The photovoltaic junction box according to claim 9, characterized in that: It also includes a dust plug, which is configured to be sealed and connected to the first glue injection hole (241) and the second glue injection hole (242) respectively.

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