Photovoltaic junction box

Abstract

The invention provides a photovoltaic junction box, relates to the technical field of photovoltaics, and aims to solve the technical problem that a photovoltaic junction box on a photovoltaic module is difficult to disassemble during repair. The photovoltaic junction box comprises a box body and a box cover, wherein the box body comprises a first part and a second part which are detachably connected; the first part is provided with a first wall plate, and the second part is provided with a second wall plate opposite to the first wall plate; slots are formed in the end surfaces, facing the box cover, of the first wall plate and the second wall plate; the box cover comprises a cover plate and two insertion plates arranged on the cover plate, the cover plate is provided with a via hole, one of the two insertion plates penetrates through the via hole and is inserted into the insertion groove of the first wall plate, and the other insertion plate is inserted into the insertion groove of the second wall plate; the first wall plate is provided with a through hole penetrating through the slot and communicating the inner wall and the outer wall of the first wall plate. The photovoltaic junction box is provided with a detachable structure, so that the photovoltaic junction box is more convenient to disassemble when being repaired after being damaged.

Description

Technical Field

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

[0002] The statements in this part only provide background art related to the present invention and do not necessarily constitute prior art.

[0003] The photovoltaic junction box is an indispensable part of the photovoltaic module. It is a protective device and also a device for interconnecting with the outside world, which can solve the safety problem under the hot spot of the photovoltaic module and the output problem of direct current.

[0004] After the photovoltaic module is installed in the power station, during the use process, the junction box may be damaged due to reasons such as poor soldering and lightning strikes and needs to be repaired. When repairing the junction box in the related art, the operator needs to use a blade to remove the junction box and the photovoltaic module. During the removal process, if the force is too large or the operation is improper, it is easy to cut off the lead wire; at the same time, the longer the curing time of the silica gel filled in the photovoltaic junction box, the greater the difficulty of removing it with a blade. Summary of the Invention

[0005] The purpose of the present invention is to provide a photovoltaic junction box to solve the technical problem that it is difficult to remove the photovoltaic junction box on the photovoltaic module during repair.

[0006] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0007] The present invention provides a photovoltaic junction box, including a box body and a box cover. The box body includes a first part and a second part that are detachably connected;

[0008] The first part has a first wall plate, and the second part has a second wall plate opposite to the first wall plate; slots are formed on the end faces of the first wall plate and the second wall plate facing the box cover;

[0009] The box cover includes a cover plate and two plug plates provided on the cover plate. The cover plate has a through hole, and one of the two plug plates penetrates through the through hole and is inserted into the slot of the first wall plate, and the other is inserted into the slot of the second wall plate;

[0010] The first wall plate has a through hole that penetrates the slot and communicates with the inner wall and the outer wall of the first wall plate.

[0011] According to at least one embodiment of the present invention, the photovoltaic junction box further includes a wire threading member, and grooves are respectively formed on the opposite two side surfaces of the wire threading member;

[0012] The first part has a first side wall plate and a second side wall plate provided at two ends of the first wall plate; the second part has a third side wall plate and a fourth side wall plate provided at two ends of the second wall plate;

[0013] The second side wall plate and the fourth side wall plate are connected by a snap structure;

[0014] At least part of the first side wall plate and at least part of the third side wall plate are respectively provided in the two grooves.

[0015] According to at least one embodiment of the present invention, a part of the snap structure is located on the outer wall of the second side wall plate, and the other part is located on the outer wall of the fourth side wall plate.

[0016] According to at least one embodiment of the present invention, the photovoltaic junction box further includes a diode module, and the diode module is detachably provided in the box body.

[0017] According to at least one embodiment of the present invention, the first part has a first bottom wall plate provided at the bottom end of the first wall plate, the second part has a second bottom wall plate provided at the bottom end of the second wall plate, and stepped grooves are respectively formed on the opposite end faces of the first bottom wall plate and the second bottom wall plate; the diode module includes a substrate, and both sides of the substrate are respectively clamped in the two stepped grooves.

[0018] According to at least one embodiment of the present invention, the diode module further includes a diode, a plurality of fixing columns and at least one supporting portion provided on the substrate;

[0019] The diode is provided on the fixing column and is located above the supporting portion.

[0020] According to at least one embodiment of the present invention, the diode module further includes a plurality of hooks provided on the substrate, and the hooks are clamped on the surface of the diode facing away from the substrate;

[0021] At least two of the plurality of hooks are respectively located on opposite sides of the diode.

[0022] According to at least one embodiment of the present invention, the distance between the diode and the cover plate is greater than or equal to the distance between the through hole and the cover plate.

[0023] According to at least one embodiment of the present invention, the wire threading member has a wire threading groove for a cable to pass through, and the wire threading member further includes a pressing block, and the pressing block is embedded in the groove opening of the wire threading groove.

[0024] According to at least one embodiment of the present invention, the photovoltaic junction box further includes a wire clamping groove, and the wire clamping groove is provided on the outer wall of the second wall plate.

[0025] Among one or more technical solutions provided in the exemplary embodiments of the present invention, at least one of the following beneficial effects can be achieved.

[0026] The photovoltaic junction box of the exemplary embodiment of the present invention is composed of a box body and a box cover. The box body is formed by a detachable first part and a second part. The box cover is formed by a cover plate and two plug plates arranged on the cover plate. The two plug plates can be inserted into the slots of the first wall plate and the second wall plate, so that the cover plate covers the box body through the two plug plates. Specifically, the cover plate has a through hole, and one of the two plug plates can pass through the through hole and be inserted into the slot of the first wall plate. Thus, when the photovoltaic junction box on the photovoltaic module needs to be repaired and removed, the box cover can be removed from the box body by removing the plug plate in the through hole of the cover plate, and the box body can be removed by disassembling the first part and the second part of the box body. Compared with the junction box in the prior art that cannot be disassembled and requires a blade to separate the junction box from the photovoltaic module, the photovoltaic junction box of the exemplary embodiment of the present invention has higher removal stability, higher working efficiency, and can also avoid situations such as uneven stress on the middle hole position of the back glass causing component explosion and cutting the lead-out cable during the repair process.

[0027] Furthermore, a through hole penetrating the first wall plate is also provided on the first wall plate, and this through hole is located at the slot position of the first wall plate. Therefore, after the repair of the junction box is completed, potting glue can be filled into the box body at this through hole, and when the plug plate is inserted into the slot of the first wall plate, it can prevent the potting glue from flowing out. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings illustrate exemplary embodiments of the present invention and, together with the description, are used to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention, and the drawings are included in this specification and form a part of this specification;

[0029] Figure 1 is an axonometric structural schematic diagram of a photovoltaic junction box according to an embodiment of the present invention;

[0030] Figure 2 is a three-dimensional exploded structural schematic diagram of a photovoltaic junction box according to an embodiment of the present invention;

[0031] Figure 3 is an axonometric structural schematic diagram of a box body and a diode module according to an embodiment of the present invention;

[0032] Figure 4 is a three-dimensional exploded structural schematic diagram of a box body and a diode module according to an embodiment of the present invention;

[0033] Figure 5 is a three-dimensional exploded structural schematic diagram of a box cover according to an embodiment of the present invention;

[0034] Figure 6 is an isometric structural schematic diagram of a diode module (without a diode) according to an embodiment of the present invention;

[0035] Figure 7 1 is a schematic diagram of the axonometric structure of a photovoltaic junction box from another perspective according to an embodiment of the present invention.

[0036] Reference numerals:

[0037] 11. first part; 110. first wall plate; 111. first side wall plate; 112. second side wall plate; 113. through hole; 12. second part; 120. second wall plate; 123. third side wall plate; 124. fourth side wall plate; 125. second bottom wall plate; 126. stepped groove;

[0038] 21. substrate; 211. fixing column; 212. hook; 213. supporting part; 22. diode;

[0039] 31. Cover plate; 311. Via hole; 32. Insert plate; 33. Slot;

[0040] 40. Cable; 41. Wire slot;

[0041] 51. Buckle; 52. Card slot;

[0042] 60. Threading piece; 61. Threading groove; 62. Pressing block; 63. Groove. DETAILED DESCRIPTION

[0043] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0044] During the operation of a photovoltaic power station, the photovoltaic junction box of a photovoltaic module may be damaged due to the following reasons, such as poor soldering during the welding of the photovoltaic junction box, failure of the diode breakdown caused by lightning strikes in the power station, and problems with the junction box itself during the circulation of photovoltaic modules within the factory. In the related art, when the photovoltaic junction box is removed from the photovoltaic module for repair, a blade is used to remove the junction box. If excessive force or improper operation is used during the removal process, it is easy to cut the cables leading out of the photovoltaic junction box.

[0045] In view of the above problems, the photovoltaic junction box provided by the exemplary embodiment of the present invention uses a split box cover and box body, and no blade is required during repair and dismantling, which can improve work efficiency and dismantling reliability.

[0046] Figure 1 is a schematic diagram of an axonometric structure of a photovoltaic junction box according to an embodiment of the present invention; Figure 4Schematic diagram of the three-dimensional exploded structure of the box body and the diode module according to an embodiment of the present invention;

[0047] Figure 5 Schematic diagram of the three-dimensional exploded structure of the box cover according to an embodiment of the present invention. As Figure 1 、 Figure 4 and Figure 5 shown, the photovoltaic junction box provided by the exemplary embodiment of the present invention includes a box body and a box cover. The box body includes a first part 11 and a second part 12 that are detachably connected; the first part 11 has a first wall plate 110, and the second part 12 has a second wall plate 120 opposite to the first wall plate 110; slots 33 are formed on the end faces of the first wall plate 110 and the second wall plate 120 facing the box cover; the box cover includes a cover plate 31 and two insertion plates 32 provided on the cover plate 31. The cover plate 31 has a through hole 311. One of the two insertion plates 32 passes through the through hole 311 and is inserted into the slot 33 of the first wall plate 110, and the other is inserted into the slot 33 of the second wall plate 120; the first wall plate 110 has a through hole 113 that penetrates the slot 33 and communicates with the inner wall and the outer wall of the first wall plate 110.

[0048] In practical applications, the box body of the photovoltaic junction box is combined by the first part 11 and the second part 12 in a detachable connection manner. Exemplarily, the first part 11 and the second part 12 are connected and disassembled through a snap structure.

[0049] The box cover is covered on the box body to form a substantially enclosed accommodation space. Specifically, the box cover includes a cover plate 31 and two opposite insertion plates 32 provided on the cover plate 31. Correspondingly, slots 33 for inserting the insertion plates 32 are formed at the tops of the first wall plate 110 of the first part 11 and the second wall plate 120 of the second part 12. When the cover plate 31 is covered on the first part 11 and the second part 12, the two insertion plates 32 are respectively inserted into the two slots 33. One part of the insertion plate 32 is connected to the cover plate 31, and the other part is connected to the first wall plate 110 or the second wall plate 120, so as to detachably connect the cover plate 31 to the box body.

[0050] In some embodiments, one insertion plate 32 is fixedly provided on the cover plate 31, and the other insertion plate 32 is detachably provided on the cover plate 31 through the through hole 311 on the cover plate 31. After the cover plate 31 is covered on the box body, the detachable insertion plate 32 is penetrated through the through hole 311 and a part of it is inserted into the slot 33 of the first wall plate 110 to form a connection.

[0051] In some other embodiments, both of the two insertion plates 32 can be detachably arranged on the cover plate 31. That is, the cover plate 31 has two through holes 311. After the cover plate 31 is covered on the box body, the two insertion plates 32 are respectively penetrated through the corresponding through holes 311 and a part of each of them is respectively inserted into the slots 33 of the first wall plate 110 and the second wall plate 120 to form a connection.

[0052] The box body of the photovoltaic junction box provided by the exemplary embodiment of the present invention has a detachable structure, and the box cover also has a detachable structure and is covered on the box body through the cooperation of the slots 33 and the insertion plates 32. Thus, when the photovoltaic junction box needs to be removed for repair, it can be easily separated from the photovoltaic module without using a blade to cut, improving the removal stability and avoiding the situation that the back glass explodes due to uneven force when the photovoltaic junction box is removed at the middle hole position and the lead-out cable is cut off.

[0053] Considering that the photovoltaic junction box is located on the back of the photovoltaic module, after the photovoltaic module is installed, the box cover of the photovoltaic junction box faces the ground. When the photovoltaic junction box needs to be filled with potting glue, such as silica gel, after being repaired and installed, to improve the heat dissipation capacity of the photovoltaic junction box. However, the potting glue cannot be filled before the cover plate 31 is installed on the box body.

[0054] Therefore, in the photovoltaic junction box provided by the exemplary embodiment of the present invention, a through hole 113 that penetrates the slot 33 and communicates with the inner wall and the outer wall of the first wall plate 110 is provided on the first wall plate 110.

[0055] When the cover plate 31 forms a temporary fixation by inserting an insertion plate 32 into the slot 33 of the second wall plate 120, the above through hole 113 can be used to fill silica gel into the box body, and then the insertion plate 32 is inserted into the slot 33 of the first wall plate 110 through the through hole 311 on the cover plate 31, so as to completely fix the cover plate 31 on the box body.

[0056] When the cover plate 31 is completely fixed on the box body, the distance between the bottom end of the insertion plate 32 inserted into the slot 33 of the first wall plate 110 and the top end of the first wall plate 110 is greater than the distance between the through hole 113 and the top end of the first wall plate 110. Thus, the insertion plate 32 can completely cover and block the through hole 113, and the outflow of the potting glue can be avoided. Compared with the photovoltaic junction box in the prior art that cannot be filled with potting glue after repair, the photovoltaic junction box of the exemplary embodiment of the present invention can still be internally filled with potting glue through the through hole 113 on the first wall plate 110 after repair, and has better heat conduction and heat dissipation capabilities.

[0057] Figure 2 is a schematic perspective exploded view of a photovoltaic junction box according to an embodiment of the present invention; Figure 3 is an axonometric structural schematic diagram of a box body and a diode module according to an embodiment of the present invention. As Figures 2 - 4As shown, the photovoltaic junction box provided by the exemplary embodiment of the present invention further includes a wire threading member 60. Grooves 63 are respectively formed on two opposite side surfaces of the wire threading member 60; the first part 11 has a first side wall plate 111 and a second side wall plate 112 provided at both ends of the first wall plate 110; the second part 12 has a third side wall plate 123 and a fourth side wall plate 124 provided at both ends of the second wall plate 120; the second side wall plate 112 and the fourth side wall plate 124 are connected by a snap structure; at least partial portions of the first side wall plate 111 and at least partial portions of the third side wall plate 123 are respectively arranged in the two grooves 63.

[0058] The diode 22 in the photovoltaic junction box needs a cable 40 to export current. Therefore, the cable 40 needs to be led out of the box body, and the wire threading groove 61 on the wire threading member 60 can be used to complete the leading out of the cable 40. The wire threading member 60 can be disassembled from the first part 11 and the second part 12 of the box body to facilitate the overall disassembly of the photovoltaic junction box.

[0059] Exemplarily, the box body of the photovoltaic junction box is generally rectangular. The first side wall plate 111 and the second side wall plate 112 are respectively bent at both ends of the first wall plate 110; the third side wall plate 123 and the fourth side wall plate 124 are respectively bent at both ends of the second wall plate 120. Among them, the wire threading member 60 is arranged between the first side wall plate 111 and the third side wall plate 123, and the free ends of the first side wall plate 111 and the third side wall plate 123 are respectively inserted into the grooves 63 on two opposite side surfaces of the wire threading member 60, so as to form mutual limitation among the first part 11, the second part 12 and the wire threading member 60. At the same time, the cooperation path between the groove 63 and the bends of the first side wall plate 111 and the third side wall plate 123 can increase the creepage distance, thereby improving the safety of the junction box.

[0060] At the same time, the second side wall plate 112 and the fourth side wall plate 124 can be butted against each other to form a side wall of the box body, and the two can be connected together through a snap structure. The snap structure can be formed on the opposite end faces of the two. For example, the card slot 52 is a deep groove opened on the second side wall plate 112, and an opening is formed on the outer wall of the second side wall plate 112 to expose the hook part of the snap 51 for easy pressing and disengagement; the snap structure can also be located on the outer walls of the two.

[0061] Exemplarily, a card slot 52 is arranged on the outer wall of the second side wall plate 112, and a snap 51 is arranged on the outer wall of the fourth side wall plate 124. When the box body needs to be disassembled, the snap 51 can be pressed to disengage it from the card slot 52.

[0062] As Figures 2 - 4 shown, the photovoltaic junction box further includes a diode module, and the diode module is detachably arranged in the box body. The diode module can also be disassembled and installed with the box body to facilitate the overall disassembly of the junction box.

[0063] Exemplarily, the first part 11 has a first bottom wall plate provided at the bottom end of the first wall plate 110, and the second part 12 has a second bottom wall plate 125 provided at the bottom end of the second wall plate 120; stepped grooves 126 are respectively formed on the opposite end faces of the first bottom wall plate and the second bottom wall plate 125; the diode module includes a substrate 21, and both sides of the substrate 21 are respectively clamped in the two stepped grooves 126.

[0064] The first bottom wall plate and the second bottom wall plate 125 may have the same shape and there is a certain interval between them. The substrate 21 of the diode module may be disposed within this interval to form the entire bottom wall of the box body together with the first bottom wall plate and the second bottom wall plate 125. A stepped groove 126 is formed on the inner wall and end face of the first bottom wall plate, and another stepped groove 126 is also formed on the inner wall and end face of the second bottom wall plate 125. The two side surfaces of the substrate 21 can be clamped in the above two stepped grooves 126 for fixation. The path of the bending fit between the two stepped grooves 126 and the substrate 21 can make the creepage distance longer, increase the water vapor infiltration path, and thus improve the safety of the junction box. At the same time, the stepped groove is formed on the inner wall of the bottom wall plate, which can facilitate the removal of the diode module.

[0065] Exemplarily, stepped surfaces are formed at the bottoms of the two side edges of the substrate 21 to cooperate with the stepped grooves 126 on the first bottom wall plate and the second bottom wall plate 125. After the substrate 21 is clamped in the two stepped grooves 126, the bottom surface of the substrate 21 is flush with the bottom surfaces of the first bottom wall plate and the second bottom wall plate 125, as Figure 7 shown. Figure 7 is an isometric structural schematic diagram of another perspective of the photovoltaic junction box according to an embodiment of the present invention.

[0066] Figure 6 is an isometric structural schematic diagram of the diode module (without diode) according to an embodiment of the present invention. As Figure 6 shown, the diode module further includes a diode 22, a plurality of fixing columns 211 provided on the substrate 21, and at least one supporting portion 213; the diode 22 is fixed on the fixing columns 211 and is located above the supporting portion 213.

[0067] Exemplarily, the diode 22 is generally rectangular, and the number of the fixing columns 211 is two, three, four or more. For example, four fixing columns 211 are respectively located at the four corner positions of the diode 22, and the diode 22 is fixed to the top ends of the fixing columns 211 by screws.

[0068] When the junction box is installed on the photovoltaic module, the bus bar of the photovoltaic module passes through the bus bar perforation on the substrate 21, enters the box body and is welded to the electrode plate of the diode 22. During the welding process, a force in the direction of the substrate 21 needs to be applied to the diode 22. To avoid damage to the diode 22, two opposite supporting parts 213 are arranged below the diode 22 so that the diode 22 will not be greatly deformed and broken.

[0069] Exemplarily, the supporting parts 213 are arranged oppositely in a plate shape and are respectively located below the two electrode plates of the diode 22. The two supporting parts 213 are located outside the two bus bar perforations and between the four fixing columns 211.

[0070] To further ensure that the position of the diode 22 on the fixing column 211 does not shake, as Figure 2 and Figure 6 shown, a plurality of hooks 212 are further arranged on the substrate 21, for example, two hooks 212. The two hooks 212 are respectively located on the opposite sides of the diode 22 and can be symmetrically or asymmetrically arranged with respect to the diode 22. The diode 22 is positioned in the width direction, and the two hooks 212 are clamped on the surface of the diode 22 facing away from the substrate 21 to realize the positioning of the diode 22 in the height direction.

[0071] In some embodiments, the distance between the diode 22 and the cover plate 31 is greater than or equal to the distance between the through hole 113 and the cover plate 31.

[0072] During the production process of the photovoltaic module, when the junction box is installed on the photovoltaic module, a potting process needs to be performed on the inside of the box body. At this time, the box cover is facing upward instead of facing the ground, and the potting adhesive needs to submerge the diode 22. In order to prevent the potting adhesive from overflowing from the through hole 113, the height of the through hole 113 is set to be higher than the height of the diode 22.

[0073] As Figures 3 - 4 、 Figure 7 shown, the wire threading member 60 has a wire threading groove 61 for the cable 40 to pass through, and the wire threading member 60 further includes a pressing block 62, and the pressing block 62 is embedded in the groove opening of the wire threading groove 61.

[0074] When the cable 40 connected to the diode 22 passes through the wire threading groove 61, the pressing block 62 can be used to be embedded in the groove opening of the wire threading groove 61 to form a complete wire hole. The detachable design of the wire threading member 60 and the pressing block 62 can facilitate the removal of the junction box from the photovoltaic module.

[0075] As Figure 1 、 Figure 3 、 Figure 7As shown, the photovoltaic junction box further includes a wire clamping groove 41, which is provided on the outer wall of the second wall plate 120. The cross-section of the wire clamping groove 41 is generally U-shaped, and it is arranged on the outer wall of the second wall plate 120 and extends along the length direction of the second wall plate 120.

[0076] In practical applications, the redundant wire 40 after the wire 40 of the junction box is bent or looped is placed in the wire clamping groove 41, which can prevent the wire 40 from falling off. During the production process of the photovoltaic module or the process of piecing together the photovoltaic modules, when the wire 40 falls off, the connector on the wire 40 will overlap on the backplane glass. Since the connector is a rigid device, scratches will be generated when it moves on the backplane glass, and then the backplane glass will burst.

[0077] Those skilled in the art should understand that the above embodiments are only for clearly explaining the present invention, rather than limiting the scope of the present invention. For those skilled in the art, other changes or variations can be made on the basis of the above disclosure, and these changes or variations are still within the scope of the present invention.

Claims

1. A photovoltaic junction box, characterized in that: The box comprises a box body and a box cover, wherein the box body comprises a first part and a second part which are detachably connected; The first part has a first wall plate, and the second part has a second wall plate opposite to the first wall plate; slots are formed on the end surfaces of the first wall plate and the second wall plate facing the box cover; The box cover comprises a cover plate and two plug-in plates arranged on the cover plate, the cover plate has a through hole, one of the two plug-in plates penetrates the through hole and is plugged into the slot of the first wall plate, and the other is plugged into the slot of the second wall plate; The first wall plate has a through hole which penetrates the slot and communicates with the inner wall and the outer wall of the first wall plate.

2. The photovoltaic junction box according to claim 1, characterized in that: The photovoltaic junction box also includes a threading piece, and grooves are respectively formed on two opposite sides of the threading piece; The first part comprises a first side wall plate and a second side wall plate arranged at both ends of the first wall plate; the second part comprises a third side wall plate and a fourth side wall plate arranged at both ends of the second wall plate; The second side wall plate and the fourth side wall plate are connected via a snap-fit ​​structure; At least a portion of the first side wall plate and at least a portion of the third side wall plate are respectively arranged in the two grooves.

3. The photovoltaic junction box according to claim 2, characterized in that: A portion of the buckle structure is located on the outer wall of the second side wall plate, and another portion of the buckle structure is located on the outer wall of the fourth side wall plate.

4. The photovoltaic junction box according to claim 1, characterized in that: The photovoltaic junction box further comprises a diode module, and the diode module is detachably arranged in the box body.

5. The photovoltaic junction box according to claim 4, characterized in that: The first part has a first bottom wall plate arranged at the bottom end of the first wall plate, and the second part has a second bottom wall plate arranged at the bottom end of the second wall plate. Step grooves are respectively opened on the opposite end surfaces of the first bottom wall plate and the second bottom wall plate; the diode module includes a substrate, and both sides of the substrate are respectively clamped in the two step grooves.

6. The photovoltaic junction box according to claim 5, characterized in that: The diode module further includes a diode and a plurality of fixing posts and at least one supporting portion provided on the substrate; The diode is arranged on the fixing column and is located above the supporting part.

7. The photovoltaic junction box according to claim 6, characterized in that: The diode module further comprises a plurality of hooks arranged on the substrate, wherein the hooks are arranged on a surface of the diode away from the substrate; At least two of the plurality of hooks are located at opposite sides of the diode, respectively.

8. The photovoltaic junction box according to claim 6, characterized in that: The distance between the diode and the cover plate is greater than or equal to the distance between the through hole and the cover plate.

9. The photovoltaic junction box according to claim 2, characterized in that: The threading piece has a threading groove for the cable to pass through, and the threading piece also includes a pressing block, which is embedded in the notch of the threading groove.

10. The photovoltaic junction box according to any one of claims 1 to 9, characterized in that: The photovoltaic junction box further comprises a wire clamping groove, and the wire clamping groove is arranged on the outer wall of the second wall plate.

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