Junction box and photovoltaic module

Abstract

The utility model relates to a junction box and a photovoltaic module. The embodiment of the utility model provides a junction box. The junction box comprises a first box body assembly, a second box body and a wiring protection piece. The first box body assembly comprises a first box body, a sealing piece and a protective cover, the first box body is provided with a first containing cavity, the protective cover covers an opening of the first containing cavity, and the sealing piece is used for sealing the first box body and the protective cover. The second box body is provided with a second containing cavity, and the first box body assembly is contained in the second containing cavity and blocks an opening of the second containing cavity. The wiring protection piece is communicated with the first accommodating cavity and extends out of the second box body. According to the junction box provided by the embodiment of the invention, the first box body and the sealing element of the first box body assembly are matched with the protective cover to play a waterproof role of a first layer, and the first box body assembly is located in the second accommodating cavity of the second box body and blocks the opening of the second accommodating cavity to play a waterproof role of a second layer. The double-layer waterproof design of the junction box improves the sealing performance and the waterproof performance.

Description

Technical Field

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

[0002] With the development of photovoltaic technology, offshore photovoltaic technology has emerged. Offshore photovoltaic power generation is to move the "photovoltaic power station" from land to sea, and use photovoltaic technology to build a power station on the ocean. Compared with onshore photovoltaics, offshore photovoltaics have natural environmental advantages: the water surface is open and there are no obstructions, the sunshine is long and fully utilized, and the power generation can be significantly increased.

[0003] Offshore photovoltaics are generally divided into two categories: pile-based fixed type and floating type, each of which has its own applicable scenarios. Since floating type has advantages over pile-based in terms of economy and environmental protection, floating photovoltaics have developed rapidly.

[0004] However, the marine environment is relatively complex and changeable, and offshore photovoltaics will face at least one risk that may affect operations, such as high humidity, high salt fog, and heavy precipitation. Utility Model Content

[0005] Based on this, it is necessary to provide junction boxes and photovoltaic modules that overcome the waterproof problem.

[0006] The embodiment of the present disclosure provides a junction box, which includes a first box body assembly, a second box body, and a wiring protection member. The first box body assembly includes a first box body, a sealing member, and a protective cover. The first box body has a first accommodating cavity, and the protective cover covers the opening of the first accommodating cavity. The sealing member is used to seal the first box body and the protective cover. The second box body has a second accommodating cavity, and the first box body assembly is accommodated in the second accommodating cavity and blocks the opening of the second accommodating cavity. The wiring protection member is connected to the first accommodating cavity and extends out of the second box body.

[0007] In the junction box provided by the embodiment of the present disclosure, the first box body, the seal and the protective cover of the first box body assembly cooperate to achieve a first layer of waterproof effect, and the first box body assembly is located in the second accommodating cavity of the second box body and blocks the opening of the second accommodating cavity, achieving a second layer of waterproof effect. The double-layer waterproof design of the junction box improves the waterproof performance.

[0008] In some embodiments, the first box assembly further includes a first fixing member, which is annular in shape and encloses the first box, and the first fixing member and the first box block the opening of the second accommodating cavity, and the first fixing member is used to fix the first box assembly. The junction box further includes a second fixing member, which is annular in shape and encloses the second box, and the second fixing member is connected to the second box.

[0009] In this way, the combination of the first fixing member and the first box body can increase the sealing and waterproof performance of the opening of the second accommodating cavity, and facilitate the fixing of the first box body assembly. The second fixing member is used to fix the second box body.

[0010] In some embodiments, the first box body includes a bottom plate, the bottom plate is opposite to the opening of the first accommodating cavity, and the bottom plate blocks the opening of the second accommodating cavity. The second box body has a mounting surface for opening the second accommodating cavity, and along the opening direction of the second accommodating cavity, the second box body, the second fixing member, the first fixing member and the bottom plate surface are flush.

[0011] With this arrangement, the second box body, the first box body, the first fixing member and the second fixing member can be simultaneously fixed on the same plane along the opening direction of the second accommodating cavity, thereby reducing the possibility of water entering from the opening of the second accommodating cavity and improving the sealing and waterproof performance of the junction box.

[0012] In some embodiments, the outer contour of the first box body is a rectangular parallelepiped, and the outer peripheral wall of the first box body abuts against the inner peripheral wall of the first fixing member; the outer peripheral wall of the first fixing member abuts against the inner peripheral wall of the second box body; the outer peripheral wall of the second box body abuts against the inner peripheral wall of the second fixing member.

[0013] With such arrangement, the inner peripheral wall and the outer peripheral wall abut against each other, thereby increasing the sealing performance and improving the installation tightness of the junction box.

[0014] In some embodiments, the outer contour of the cross section of the wiring guard is circular; the first box body is also provided with a first through hole, the first through hole is connected to the side wall of the first accommodating cavity, the first through hole is connected to the wiring guard, and the diameter of the first through hole is smaller than the outer diameter of the wiring guard.

[0015] With this arrangement, since the diameter of the first through hole is smaller than the outer diameter of the wiring protection member, water on the outer diameter of the wiring protection member is not easy to enter the first through hole through the connection between the wiring protection member and the first box body, thereby improving the waterproof performance of the junction box.

[0016] In some embodiments, the second box body is provided with a second through hole, the second through hole is connected to the side wall of the second accommodating cavity, the second through hole is arranged corresponding to the first through hole, the wiring guard passes through the second through hole, and the diameter of the second through hole is equal to the outer diameter of the wiring guard.

[0017] In this arrangement, since the first through hole corresponds to the second through hole, it is convenient for the wiring protection member to pass through the second through hole. The diameter of the second through hole is equal to the outer diameter of the wiring protection member, so that the outer peripheral wall of the wiring protection member abuts against the inner wall of the second through hole, reducing the possibility of water entering from the second through hole, and improving the sealing performance and waterproof performance of the junction box.

[0018] In some embodiments, the second fixing member further includes a supporting portion having a recess that cooperates with the wiring protection member.

[0019] With such arrangement, the support portion can be used to fix the position of the wiring protection member in the junction box, preventing the movement of the wiring protection member in the junction box from causing water to enter the junction box, thereby improving the waterproof performance of the junction box.

[0020] In some embodiments, the second box body is further provided with a mounting groove, the mounting groove is connected to the second through hole along the opening direction of the second accommodating cavity, the mounting groove is connected to the second accommodating cavity, and the supporting portion is snap-connected to the mounting groove.

[0021] With such arrangement, the mounting groove facilitates the second fixing portion to be fixedly connected to the second box body.

[0022] In some embodiments, the first fixing member and the second fixing member are both silicone members.

[0023] With this arrangement, the silicone has excellent corrosion resistance, insulation performance and high temperature resistance, and the silicone parts as fixing parts also have waterproof properties, so that the junction box can not only overcome the waterproof problem but also improve corrosion resistance.

[0024] In some embodiments, the first box body and the second box body are both integral structures.

[0025] With this arrangement, the one-piece structure does not require assembly, which reduces the processing technology. The one-piece structure avoids gaps caused by assembly and improves the waterproof effect.

[0026] The disclosed embodiment provides a photovoltaic assembly, which includes the above-mentioned junction box, electrical components and photovoltaic panels, wherein the junction box is connected to the back plate of the photovoltaic panel; the electrical components are accommodated in the first accommodation cavity, and the electrical components are electrically connected to the photovoltaic panel.

[0027] The photovoltaic module provided by the embodiment of the present disclosure has a junction box that can achieve a double waterproof effect. The two-layer box body of the junction box improves corrosion resistance, making the photovoltaic module more suitable for use in a marine environment with high salt fog. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of the overall structure of a junction box in an embodiment of the present disclosure;

[0029] Figure 2 is an exploded view of a junction box in an embodiment of the present disclosure;

[0030] Figure 3 It is a structural schematic diagram of the first box body assembly and the wiring protection member in the embodiment of the present disclosure;

[0031] Figure 4It is a structural schematic diagram of the first box body and the wiring protection member in the embodiment of the present disclosure;

[0032] Figure 5 is a schematic structural diagram of a second box body in an embodiment of the present disclosure;

[0033] Figure 6 is a schematic structural diagram of a second fixing member in an embodiment of the present disclosure;

[0034] Figure 7 It is a schematic diagram of the connection structure between the second box body and the second fixing member in the embodiment of the present disclosure;

[0035] Figure 8 It is a schematic diagram of the structure of the photovoltaic assembly in the embodiment of the present disclosure.

[0036] Reference numerals:

[0037] 1000, photovoltaic module; 100, junction box; 10, first box body assembly; 11, first box body; 111, first accommodating cavity; 112, bottom plate; 113, first through hole; 12, sealing member; 13, protective cover; 14, first fixing member; 20, second box body; 21, second accommodating cavity; 22, mounting surface; 23, second through hole; 24, mounting groove; 30, wiring protection member; 40, second fixing member; 41, supporting portion; 200, photovoltaic panel. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present disclosure more obvious and understandable, the specific implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the embodiments of the present disclosure. However, the embodiments of the present disclosure can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the embodiments of the present disclosure, so the embodiments of the present disclosure are not limited by the specific embodiments disclosed below.

[0039] In the description of the embodiments of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "perpendicular", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present disclosure and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present disclosure.

[0040] In the embodiments of the present disclosure, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0041] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. Exemplarily, the first box body may also be referred to as the second box body, and the second box body may also be referred to as the first box body. In the description of the present utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0042] In the embodiments of the present disclosure, unless otherwise clearly specified and limited, the terms "connected", "connection", and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a flexible connection, or a rigid connection along at least one direction; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or directly connected with the presence of an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly limited. The terms "installed", "fixed", and the like can be broadly understood as connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0043] refer to Figure 1 , Figure 1 The overall structure of the junction box 100 in the embodiment of the present disclosure is shown. The present disclosure relates to the field of photovoltaic technology.

[0044] refer to Figures 1 to 5, an embodiment of the present disclosure provides a junction box 100. The junction box 100 includes a first box body assembly 10, a second box body 20 and a junction protection member 30. The first box body assembly 10 includes a first box body 11, a seal 12 and a protective cover 13. The first box body 11 has a first accommodating cavity 111, the protective cover 13 covers the opening of the first accommodating cavity 111, and the seal 12 is used to seal the first box body 11 and the protective cover 13. Exemplarily, the opening of the first accommodating cavity 111 faces downward, the protective cover 13 is located on the lower side of the first box body 11, and the seal 12 is located between the first box body 11 and the protective cover 13.

[0045] The second box body 20 has a second accommodating cavity 21. The first box body assembly 10 is accommodated in the second accommodating cavity 21 and blocks the opening of the second accommodating cavity 21. Exemplarily, the opening of the second accommodating cavity 21 faces upward.

[0046] The wiring protection member 30 is connected to the first accommodating chamber 111. The wiring protection member 30 extends out of the second box body 20. Exemplarily, the wiring protection member 30 is connected to the first accommodating chamber 111 from the side wall of the first accommodating chamber 111, and the wiring protection member 30 extends out of the second box body 20 from the side wall of the second accommodating chamber 21.

[0047] In the junction box 100 provided in the embodiment of the present disclosure, the opening of the first accommodating cavity 111 faces downward, the opening at the lower end of the first box body 11 is covered by the protective cover 13, and the sealing member 12 is located between the protective cover 13 and the first box body 11 to play a sealing role. The first box body assembly 10 is placed in the second accommodating cavity 21, with one end of the protective cover 13 facing downward, and the second box body 20 assembly can block the opening of the second accommodating cavity 21 to play a sealing role. The wiring protection member 30 can be connected to the first accommodating cavity 111 and extend out of the second box body 20.

[0048] In the junction box 100 provided in the embodiment of the present disclosure, the first box body 11, the seal 12 and the protective cover 13 of the first box body assembly 10 cooperate to achieve a first layer of waterproof effect, and the first box body assembly 10 is located in the second accommodating cavity 21 of the second box body 20 and blocks the opening of the second accommodating cavity 21, achieving a second layer of waterproof effect. The double-layer waterproof design of the junction box 100 improves the waterproof performance.

[0049] Exemplarily, the protective cover 13 is provided with a groove, the inner diameter of the groove of the protective cover 13 is the same as the outer diameter of the first box body 11, the groove of the protective cover 13 covers the open end of the first box body 11, and the seal 12 is located between the groove of the protective cover 13 and the first box body 11.

[0050] Exemplarily, the outer diameter of the protective cover 13 is the same as the opening size of the first accommodating cavity 111 , the protective cover 13 is located at the opening of the first accommodating cavity 111 , and the sealing member 12 is located between the protective cover 13 and the first accommodating cavity 111 .

[0051] Exemplarily, the opening direction of the first accommodating cavity 111 is opposite to the opening direction of the second accommodating cavity 21 .

[0052] Exemplarily, the opening of the first accommodating cavity 111 faces left or right, and the opening of the second accommodating cavity 21 faces upward or downward. Exemplarily, the opening of the first accommodating cavity 111 faces forward or backward, and the opening of the second accommodating cavity 21 faces upward or downward.

[0053] Exemplarily, the wiring protection member 30 can be connected to the first accommodating chamber 111 through the protection cover 13 , and the wiring protection cover 13 extends from the bottom wall or the side wall of the second accommodating chamber 21 .

[0054] It is understandable that the first box body 11 and the second box body 20 are both made of insulating materials. The materials of the first box body 11 and the second box body 20 can be the same or different.

[0055] Exemplarily, the first box body 11 and the second box body 20 are both made of plastic.

[0056] refer to Figures 1 to 3 In some embodiments, the first box assembly 10 further includes a first fixing member 14, which is annular in shape and encloses the first box body 11. The first fixing member 14 and the first box body 11 block the opening of the second accommodating cavity 21, and the first fixing member 14 is used to fix the first box assembly 10. The junction box 100 further includes a second fixing member 40, which is annular in shape and encloses the second box body 20, and the second fixing member 40 is connected to the second box body 20.

[0057] In this way, the combination of the first fixing member 14 and the first box body 11 can increase the sealing and waterproof performance at the opening of the second accommodating cavity 21, and facilitate the fixing of the first box body assembly 10. The second fixing member 40 is used to fix the second box body 20.

[0058] refer to Figures 3 to 5 In some embodiments, the first box body 11 includes a bottom plate 112, the bottom plate 112 is opposite to the opening of the first accommodating cavity 111, and the bottom plate 112 blocks the opening of the second accommodating cavity 21. The second box body 20 has a mounting surface 22 for opening the second accommodating cavity 21. Figure 1 As shown, along the opening direction of the second accommodating cavity 21, the second box body 20, the second fixing member 40, the first fixing member 14 and the bottom plate 112 are flush with each other. The opening of the first accommodating cavity 111 faces the bottom wall of the second accommodating cavity 21; the surfaces of the first fixing member 14 and the bottom plate 112 facing away from the opening of the first accommodating cavity 111 are flush with the mounting surface 22. For example, the surface of the second fixing member 40 facing away from the wiring protection member 30 is also flush with the mounting surface 22.

[0059] With such arrangement, the second box body 20, the first box body 11, the first fixing member 14 and the second fixing member 40 are conveniently fixed on the same plane at the same time along the opening direction of the second accommodating cavity 21, thereby reducing the possibility of water entering from the opening of the second accommodating cavity 21 and improving the sealing and waterproof performance of the junction box 100.

[0060] Exemplarily, along the opening direction of the second accommodating cavity 21 , the surface of the second fixing member 40 is not lower than the surfaces of the second box body 20 , the first fixing member 14 and the first box body 11 .

[0061] Exemplarily, along the opening direction of the second accommodating cavity 21 , the surface of the first box body 11 is not higher than the surface of the second box body 20 .

[0062] Exemplarily, the first fixing member 14 is enclosed by the outer peripheral wall of the bottom plate 112 of the first accommodating cavity 111 , and the second fixing member 40 is enclosed by a portion of the outer peripheral wall of the second accommodating cavity 21 corresponding to the opening.

[0063] refer to Figures 1 to 7 In some embodiments, the outer contour of the first box body 11 is a rectangular parallelepiped, and the outer peripheral wall of the first box body 11 abuts against the inner peripheral wall of the first fixing member 14; the outer peripheral wall of the first fixing member 14 abuts against the inner peripheral wall of the second box body 20; and the outer peripheral wall of the second box body 20 abuts against the inner peripheral wall of the second fixing member 40.

[0064] With such arrangement, the inner peripheral wall and the outer peripheral wall abut against each other, thereby increasing the sealing performance and improving the installation tightness of the junction box 100 .

[0065] Exemplarily, the outer peripheral wall of the protective cover 13 abuts against the inner peripheral wall of the second box body 20 .

[0066] Exemplarily, the outer contour of the second box body 20 is a rectangle. Exemplarily, the shape of the first accommodating cavity 111 is a cuboid, and the shape of the second accommodating cavity 21 is also a cuboid.

[0067] In some embodiments, the outer contour of the first box body 11 is cylindrical, and the outer contour of the second box body 20 is cylindrical. Exemplarily, the shape of the first accommodating cavity 111 is cylindrical, and the shape of the second accommodating cavity 21 is also cylindrical. Exemplarily, the shape of the sealing member 12, the first fixing member 14, and the second fixing member 40 are all annular.

[0068] refer to Figures 1 to 4 In some embodiments, the outer contour of the cross section of the wiring protection member 30 is circular. The first box body 11 is further provided with a first through hole 113, the first through hole 113 is connected to the side wall of the first accommodating cavity 111, and the first through hole 113 is connected to the wiring protection member 30, and the diameter of the first through hole 113 is smaller than the outer diameter of the wiring protection member 30.

[0069] In this configuration, since the diameter of the first through hole 113 is smaller than the outer diameter of the wiring protection member 30 , water on the outer diameter of the wiring protection member 30 is not easy to enter the first through hole 113 through the connection between the wiring protection member 30 and the first box body 11 , thereby improving the waterproof performance of the junction box 100 .

[0070] Exemplarily, the terminal guard 30 is a hose so that the terminal guard 30 can be bent.

[0071] refer to Figure 1 , Figure 5 , Figure 6 and Figure 7 In some embodiments, the second box body 20 is provided with a second through hole 23, the second through hole 23 is connected to the side wall of the second accommodating cavity 21, the second through hole 23 is arranged corresponding to the first through hole 113, the wiring guard 30 passes through the second through hole 23, and the diameter of the second through hole 23 is equal to the outer diameter of the wiring guard 30.

[0072] In this arrangement, since the first through hole 113 corresponds to the second through hole 23, it is convenient for the wiring protection member 30 to pass through the second through hole 23. The diameter of the second through hole 23 is equal to the outer diameter of the wiring protection member 30, so that the outer peripheral wall of the wiring protection member 30 abuts against the inner wall of the second through hole 23, reducing the possibility of water entering from the second through hole 23, and improving the sealing performance and waterproof performance of the junction box 100.

[0073] Exemplarily, the second through hole 23 is circular in shape.

[0074] Exemplarily, the second through hole 23 may also be disposed on the bottom wall of the second accommodating cavity 21 .

[0075] refer to Figures 5 to 7 In some embodiments, the second fixing member 40 further includes a supporting portion 41 , and the supporting portion 41 has a recess that cooperates with the wiring protection member 30 .

[0076] In this way, the support portion 41 can be used to fix the position of the wiring protection member 30 in the junction box 100 , preventing the wiring protection member 30 from moving in the junction box 100 and causing water to enter the junction box 100 , thereby improving the waterproof performance of the junction box 100 .

[0077] Exemplarily, the shape of the recess is semi-cylindrical.

[0078] Exemplarily, the support portion 41 is connected to an inner wall of the second fixing member 40 .

[0079] refer to Figures 5 to 7In some embodiments, the second box body 20 is further provided with a mounting groove 24 , the mounting groove 24 is connected to the second through hole 23 along the opening direction of the second accommodating cavity 21 , the mounting groove 24 is connected to the second accommodating cavity 21 , and the support portion 41 is snapped into the mounting groove 24 .

[0080] In this way, the mounting groove 24 facilitates the second fixing portion to be fixedly connected to the second box body 20 .

[0081] Exemplarily, the second through hole 23 passes through the side wall of the second accommodating cavity 21 in the left-right direction, the mounting groove 24 communicates with the second through hole 23 in the up-down direction, and the mounting groove 24 communicates with the second accommodating cavity 21 .

[0082] In some embodiments, the first fixing member 14 and the second fixing member 40 are both made of silicone.

[0083] With such a configuration, the silicone has excellent corrosion resistance, insulation performance and high temperature resistance, and the silicone piece as a fixing piece also has waterproof performance, so that the junction box 100 can not only overcome the waterproof problem but also improve the corrosion resistance.

[0084] In some embodiments, the first box body 11 and the second box body 20 are both integral structures.

[0085] With this arrangement, the one-piece structure does not require assembly, which reduces the processing technology. The one-piece structure avoids gaps caused by assembly and improves the waterproof effect.

[0086] In other embodiments, the first box body 11 may be a split structure.

[0087] refer to Figure 8 The embodiment of the present disclosure provides a photovoltaic assembly 1000, which includes the junction box 100, an electrical component (not shown) and a photovoltaic panel 200, wherein the junction box 100 is connected to the back plate of the photovoltaic panel 200. The electrical component is accommodated in the first accommodation cavity 111, and the electrical component is electrically connected to the photovoltaic panel 200.

[0088] The photovoltaic module 1000 provided in the embodiment of the present disclosure is more suitable for use in a marine environment with high salt fog because the junction box 100 can achieve a double waterproof effect and the two-layer box body of the junction box 100 improves the corrosion resistance.

[0089] For example, the photovoltaic panel 200 includes a front panel, a battery cell and a back panel stacked in sequence in the vertical direction, and the battery cell is bonded to the front panel and the back panel by adhesive films. The junction box 100 is connected to the back panel of the photovoltaic panel 200 .

[0090] Exemplarily, along the opening direction of the second accommodating cavity 21 , the surfaces of the first fixing member 14 and the second fixing member 40 are both adhesive surfaces for bonding the junction box 100 to the back side of the photovoltaic panel 200 .

[0091] Exemplarily, the connection steps of the junction box 100 and the photovoltaic panel 200 are as follows: the first junction box 100 is fixed to the back plate of the photovoltaic panel 200 through the adhesive surface of the first fixing member 14, and at this time, the bottom plate 112 of the junction box 100 is in contact with the back plate of the photovoltaic panel 200. The first box body 11 and the protective cover 13 are covered on the first box body 11 through the cooperation of the sealing ring to form a first waterproof structure. The second fixing member 40 is clamped to the second box body 20, and then the second box body 20 is moved to cover the first box body assembly 10 as a whole inside the second accommodating cavity 21, and the wiring protective member 30 is passed through the second through hole 23. Finally, the second box body 20 and the second fixing member 40 are fixed to the back plate of the photovoltaic panel 200 through the adhesive surface of the second fixing member 40 to form a second waterproof structure.

[0092] The technical features of the embodiments disclosed above can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the embodiments described above are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0093] The above disclosed embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A junction box, characterized in that: include: A first box body assembly, comprising a first box body, a sealing member and a protective cover, wherein the first box body has a first accommodating cavity, the protective cover covers an opening of the first accommodating cavity, and the sealing member is used to seal the first box body and the protective cover; A second box body having a second accommodating cavity, wherein the first box body component is accommodated in the second accommodating cavity and blocks an opening of the second accommodating cavity; and The wiring protection member is connected to the first accommodating cavity and extends out of the second box body.

2. The junction box according to claim 1, characterized in that: The first box body assembly further includes a first fixing member, which is annular in shape and encloses the first box body. The first fixing member and the first box body block the opening of the second accommodating cavity, and the first fixing member is used to fix the first box body assembly; The junction box further includes a second fixing member, which is in a ring shape and is enclosed by the second box body and connected to the second box body.

3. The junction box according to claim 2, characterized in that: The first box body includes a bottom plate, the bottom plate is opposite to the opening of the first accommodating cavity, and the bottom plate blocks the opening of the second accommodating cavity; The second box body has a mounting surface for opening the second accommodating cavity. Along the opening direction of the second accommodating cavity, the second box body, the second fixing member, the first fixing member and the bottom plate surface are flush.

4. The junction box according to claim 2, characterized in that: The outer contour of the first box body is a rectangular parallelepiped, and the outer peripheral wall of the first box body abuts against the inner peripheral wall of the first fixing member; the outer peripheral wall of the first fixing member abuts against the inner peripheral wall of the second box body; the outer peripheral wall of the second box body abuts against the inner peripheral wall of the second fixing member.

5. The junction box according to claim 4, characterized in that: The outer contour of the cross section of the wiring guard is circular; the first box body is also provided with a first through hole, the first through hole is connected to the side wall of the first accommodating cavity, the first through hole is connected to the wiring guard, and the diameter of the first through hole is smaller than the outer diameter of the wiring guard.

6. The junction box according to claim 5, characterized in that: The second box body is provided with a second through hole, the second through hole is connected to the side wall of the second accommodating cavity, the second through hole is arranged corresponding to the first through hole, the wiring protection piece passes through the second through hole, and the diameter of the second through hole is equal to the outer diameter of the wiring protection piece.

7. The junction box according to claim 6, characterized in that: The second fixing member further includes a supporting portion having a recess matched with the wiring protection member.

8. The junction box according to claim 7, characterized in that: The second box body is further provided with a mounting groove, the mounting groove is connected to the second through hole along the opening direction of the second accommodating cavity, the mounting groove is connected to the second accommodating cavity, and the supporting portion is clamped in the mounting groove.

9. The junction box according to claim 8, characterized in that: The first fixing member and the second fixing member are both silicone members; The first box body and the second box body are both integrated structures.

10. A photovoltaic module, characterized in that It comprises the junction box, electrical component and photovoltaic panel according to any one of claims 1 to 9, wherein the junction box is connected to the back plate of the photovoltaic panel; the electrical component is accommodated in the first accommodation cavity, and the electrical component is electrically connected to the photovoltaic panel.

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