Photovoltaic junction box and junction box assembly

Abstract

The photovoltaic junction box comprises a box body, an upper cover used for being buckled with the box body is arranged on the box body, the box body comprises a bottom wall and side walls located on the periphery of the bottom wall, and the bottom wall, the upper cover and the side walls form a containing space. Wherein one side, far away from the accommodating space, of one side wall is provided with a connector plugging assembly, one end of the bottom wall is provided with an extension part, the extension part is located below the connector plugging assembly, the connector plugging assembly is connected with the extension part through a connecting block, and four corners of the bottom surface of the bottom wall are respectively provided with a supporting leg. According to the photovoltaic junction box, through the arrangement of the extending parts and the supporting legs, when the photovoltaic junction box is installed on a photovoltaic back plate, on one hand, the thickness of glue can be guaranteed, the bonding firmness of the photovoltaic junction box is further guaranteed, on the other hand, the gravity center of the whole photovoltaic junction box can be stable, and therefore the photovoltaic junction box can be installed on the photovoltaic back plate, and the service life of the photovoltaic junction box is prolonged. And the tilting phenomenon is avoided in the bonding process.

Description

Technical Field

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

[0002] In photovoltaic power generation systems, photovoltaic junction boxes are needed to lead out the electricity generated by photovoltaic modules to connect to external loads. Therefore, photovoltaic module junction boxes are key components for photovoltaic modules to build various power generation systems. When using photovoltaic junction boxes, the back of the photovoltaic junction boxes needs to be glued to the photovoltaic backboard, and connectors, cables and other parts are generally required to achieve power connection between adjacent photovoltaic modules.

[0003] In order to reduce the number of installation steps, there is a plan at this stage to integrate the junction box and the connector into an integrated design, and set the connector plug-in structure on one side of the junction box. However, this design will cause the center of gravity of the junction box to shift. When the junction box is adhered to the photovoltaic backboard and the glue has not dried, a slight touch from external force may cause the junction box to tip over and tilt, thereby affecting the installation of the junction box.

[0004] At the same time, at present, the junction box base plate is a multi-plane structure. After the glue is applied on the plane structure, it takes a certain amount of time for the glue to air-dry. Therefore, when the junction box is pressed hard and adhered to the photovoltaic module, the glue will overflow, causing the glue layer on the bottom of the junction box base plate to become thinner, affecting the viscosity. Utility Model Content

[0005] The technical problem solved by the utility model is to provide a photovoltaic junction box which ensures the adhesion stability between the photovoltaic junction box and the photovoltaic back plate.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a photovoltaic junction box, including a box body, a top cover for buckling with the box body is arranged on the box body, the box body includes a bottom wall and side walls located around the bottom wall, the bottom wall, the top cover and the side walls form a accommodating space, one of the side walls away from the accommodating space is provided with a connector plug assembly, a conductive terminal is arranged in the accommodating space, a pin is arranged in the connector plug assembly, a through hole is arranged on the side wall connected to the connector plug assembly, one end of the pin passes through the through hole and is electrically connected to the conductive terminal, the other end of the pin extends outward, an extension portion is arranged at one end of the bottom wall, and the extension portion is located below the connector plug assembly.

[0007] Furthermore, supporting feet are respectively arranged at the four corners of the bottom surface of the bottom wall, wherein two supporting feet are located below the extending portion of the bottom wall.

[0008] Furthermore, the connector plug-in assembly and the extension portion are connected via a connecting block.

[0009] Furthermore, the height of the supporting feet is 0.7mm-0.8mm.

[0010] Furthermore, it also includes a bypass protection module, the conductive terminal is arranged on the bypass protection module, the bypass protection module is arranged in the box body, an anti-foolproof notch is arranged on an edge side of the bypass protection module, and at least one positioning hole is arranged on the bypass protection module;

[0011] The bottom wall surface is provided with a positioning column matched with the positioning hole and an anti-fool column matched with the anti-fool notch.

[0012] Furthermore, the bottom wall is provided with a glue leakage hole and a welding process hole, and the glue leakage hole and the welding process hole are connected with the accommodating space.

[0013] Furthermore, the connector plug-in assembly is a male end plug-in assembly, which includes a first plug-in body, a plug pin is provided at one end of the first plug-in body away from the box body, a first through groove is provided inside the first plug-in body and the plug pin, and the plug pin is located in the first through groove.

[0014] Furthermore, one end of the pin extending into the box body is flat, and the other end of the pin is a hollow socket structure. A drum spring is arranged inside the hollow socket structure, and hook parts are symmetrically arranged on both sides of the pin, and the hook parts are connected to the first plug body.

[0015] Furthermore, the connector plug-in assembly is a female-end plug-in assembly, and the female-end plug-in assembly includes a second plug-in body, and a second through groove is provided inside the second plug-in body, and the pin is located in the second through groove.

[0016] Furthermore, one end of the plug pin extending into the box body is flat, the other end of the plug pin is a needle-shaped structure, and a group of clamping holes are symmetrically arranged at one end of the second plug body away from the box body.

[0017] Furthermore, the connector plug-in assembly is integrally formed with the box body or connected to the box body by plugging or snapping.

[0018] Furthermore, the first plug body and the second plug body are both provided with limiting steps on the inner sides thereof for matching with the plug pins.

[0019] The utility model also discloses a junction box assembly, which adopts the photovoltaic junction box described above, including a left photovoltaic junction box and a right photovoltaic junction box, wherein the connector plug-in assemblies at one end of the left photovoltaic junction box and the right photovoltaic junction box are both male end plug-in assemblies, or the connector plug-in assemblies at one end of the left photovoltaic junction box and the right photovoltaic junction box are both female end plug-in assemblies, or one of the connector plug-in assemblies at one end of the left photovoltaic junction box and the right photovoltaic junction box is a male end plug-in assembly, and the other is a female end plug-in assembly;

[0020] It also includes an external connector that is respectively matched with the left photovoltaic junction box and the right photovoltaic junction box, one end of the external connector is connected to a cable, and the other end of the external connector is plugged into the left photovoltaic junction box or the right photovoltaic junction box.

[0021] Furthermore, it also includes an intermediate photovoltaic junction box, which is located between the left photovoltaic junction box and the right photovoltaic junction box, and the connector plug-in component at one end of the intermediate photovoltaic junction box is a female end plug-in component or a male end plug-in component.

[0022] The beneficial effect of the utility model is that in this structure, an extension portion is provided at one end of the bottom wall, and supporting feet are respectively provided at the four corners of the bottom surface of the bottom wall, and two of the supporting feet are located below the extension portion of the bottom wall, so that when the photovoltaic junction box is installed on the photovoltaic backboard, on the one hand, there will be a certain space between the bottom of the box body and the photovoltaic backboard, thereby ensuring the thickness of the glue and further ensuring its bonding firmness, and on the other hand, the center of gravity of the entire photovoltaic junction box can be stabilized, and no warping will occur during the bonding process. At the same time, in this structure, since the connector plug-in assembly and the extension portion are connected by a connecting block, the connection strength between the connector plug-in assembly and the box body can be enhanced to prevent them from breaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of a photovoltaic junction box according to an embodiment of the present application.

[0024] Figure 2 This is a schematic diagram of the bottom-up structure of the photovoltaic junction box according to an embodiment of the present application.

[0025] Figure 3 It is a schematic diagram of the side structure of the photovoltaic junction box according to an embodiment of the present application.

[0026] Figure 4 This is a structural schematic diagram of the photovoltaic junction box connector plug-in component of the embodiment of the present application when it is a male end plug-in component.

[0027] Figure 5 This is a cross-sectional view of the photovoltaic junction box connector plug-in assembly of the embodiment of the present application when it is a male end plug-in assembly.

[0028] Figure 6This is a cross-sectional view of the external connector of the embodiment of the present application when the plug-in component is a female plug-in component.

[0029] Figure 7 This is a structural schematic diagram of the photovoltaic junction box connector plug-in component of the embodiment of the present application when it is a female end plug-in component.

[0030] Figure 8 This is a cross-sectional view of the photovoltaic junction box connector plug-in assembly of the embodiment of the present application when it is a female end plug-in assembly.

[0031] Fig. 9 This is a cross-sectional view of the connector plug-in component of the external connector of the embodiment of the present application when it is a male plug-in component.

[0032] Fig.10 This is a schematic diagram of the structure of Example 5 in the application of this application.

[0033] Fig.11 This is a schematic diagram of the structure of Example 6 in the application of this application.

[0034] Fig.12 This is a schematic diagram of the structure of Example 8 in the application of this application.

[0035] Fig.13 Schematic diagram of a photovoltaic junction box without a bypass protection module in an embodiment of the present application.

[0036] Marked in the figure are: upper cover 1, side wall 2, bottom wall 3, positioning column 301, anti-fool column 302, glue leakage hole 303, welding process hole 304, connector plug assembly 4, male end plug assembly 41, first plug body 410, pin 411, hook portion 412, female end plug assembly 42, second plug body 421, snap hole 422, limit step 43, bypass protection module 5, conductive terminal 51, anti-fool notch 501, positioning hole 502, pin 6, drum spring 601, extension portion 7, connecting block 8, supporting foot 9, left photovoltaic junction box 10, right photovoltaic junction box 20, external connector 30, cable 40, middle photovoltaic junction box 50. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0038] like Figure 1 , Figure 2 , Figure 3 and Fig.13As shown, an embodiment of the present application discloses a photovoltaic junction box, including a box body, on which is provided an upper cover 1 for snapping with the box body, the box body including a bottom wall 3 and side walls 2 located around the bottom wall 3, the bottom wall 3, the upper cover 1 and the side walls 2 forming a accommodating space, wherein a connector plug assembly 4 is provided on one side wall 2 away from the accommodating space, a conductive terminal 51 is provided in the accommodating space, a plug pin 6 is provided in the connector plug assembly 4, a through hole is provided on the side wall 2 connected to the connector plug assembly, one end of the plug pin 6 passes through the through hole and is electrically connected to the conductive terminal 51, and the other end of the plug pin 6 extends outward, an extension portion 7 is provided at one end of the bottom wall 3, the extension portion 7 is located below the connector plug assembly 4, and the connector plug assembly 4 and the extension portion 7 are connected via a connecting block 8.

[0039] Specifically, the connector plug-in assembly 4 is formed integrally with the box body or connected to the box body by plugging or snapping.

[0040] Specifically, when the photovoltaic junction box is installed, glue is coated on the bottom of the box body and then bonded to the photovoltaic backboard through the bonding effect of the glue. When this structure is in use, since a connector plug-in assembly 4 is provided on one side of the box body, when connecting with an external connector 30, the junction box can be connected to the external connection by simply plugging them into each other.

[0041] In this structure, an extension portion 7 is provided on one end of the bottom wall 3, so that when the photovoltaic junction box is installed on the photovoltaic backboard, the center of gravity of the entire photovoltaic junction box can be stabilized, and no warping will occur during the bonding process. At the same time, this structure designs the connector and the plug-in portion into an integrated structure, thereby reducing the impact of the environment on the connector. At the same time, the design of the plug-in structure also facilitates the connection of photovoltaic components.

[0042] In this embodiment, the connector plug-in assembly 4 and the extension portion 7 are connected via a connecting block 8 .

[0043] Specifically, in this structure, since the connector plug assembly 4 and the extension portion 7 are connected via the connection block 8, the connection strength between the connector plug assembly 4 and the box body can be enhanced to prevent the connection from breaking.

[0044] In this embodiment, support feet 9 are respectively provided at the four corners of the bottom surface of the bottom wall 3 , wherein two support feet 9 are located below the bottom wall extension portion 7 .

[0045] Specifically, the height of the supporting foot 9 is 0.7 mm-0.8 mm, and the specific height can be set according to actual conditions, for example: 0.7 mm, 0.75 mm, 0.8 mm, etc.

[0046] Specifically, when the photovoltaic junction box is installed, glue is coated on the bottom of the box body and then bonded to the photovoltaic backboard through the bonding effect of the glue. Due to the setting of the supporting feet 9 in this structure, the glue can be filled in the gap between the bottom of the box body and the photovoltaic backboard, ensuring the thickness of the glue, so that the photovoltaic junction box is firmly bonded to the photovoltaic backboard.

[0047] In the present structure, supporting feet 9 are respectively provided at the four corners of the bottom surface of the bottom wall 3, and two of the supporting feet 9 are located below the bottom wall extension portion 7. Thus, when the photovoltaic junction box is installed on the photovoltaic backboard, there will be a certain space between the bottom of the box body and the photovoltaic backboard, thereby ensuring the thickness of the glue and further ensuring its bonding firmness. At the same time, since two of the supporting feet 9 are located below the bottom wall extension portion 7, the center of gravity of the entire photovoltaic junction box can be stabilized.

[0048] In this embodiment, an anti-foolproof notch 501 is provided on an edge side of the bypass protection module 5, at least one positioning hole 502 is provided on the bypass protection module 5, and a positioning column 301 cooperating with the positioning hole 502 and an anti-foolproof column 302 cooperating with the anti-foolproof notch 501 are provided on the surface of the bottom wall 3.

[0049] Specifically, the positioning holes 502 and positioning columns 301 described above may be provided in plurality. Three groups are designed in the present application, so that three positioning holes 502 and one fool-proof notch 501 are respectively located at the four feet of the bypass protection module 5 .

[0050] Specifically, when the bypass protection module 5 is installed in the box body, since the bypass protection module 5 has a front and back structure, during installation, the anti-foolproof notch 501 on one edge of the bypass protection module 5 is aligned with the anti-foolproof stop in the box body to make them fit together, and then the positioning hole 502 on the bypass protection module 5 is matched with the positioning column 301 in the box body, so that the bypass protection module 5 is installed in the box body.

[0051] The design of the foolproof notch 501, the positioning hole 502, the positioning column 301 and the foolproof column 302 in this structure can realize the positioning and placement of the bypass protection module 5, thereby solving the problems of the bypass protection module 5 being placed upside down and unable to be accurately positioned.

[0052] In this embodiment, the bottom wall 3 is provided with a glue leakage hole 303 and a welding process hole 304 , and the glue leakage hole 303 and the welding process hole 304 are communicated with the accommodating space.

[0053] Specifically, in the production process of the photovoltaic junction box, after the bypass protection module 5 is placed and the pin 6 is electrically connected to the conductive end of the bypass protection module 5, glue filling is required. During the glue filling, excess glue can flow out from the glue leakage hole 303 and fill the concave part in the box body, completing the glue sealing operation. At the same time, the setting of the glue leakage hole 303 can facilitate the leakage of excess glue during the glue sealing operation, thereby ensuring that the concave parts in the box body are filled with glue.

[0054] In the above structure, the setting of the process hole can facilitate the welding of the pin 6 and the bypass protection module 5.

[0055] In this embodiment, Figures 4 to 5 As shown, the connector plug-in component 4 is a male end plug-in component 41, and the male end plug-in component 41 includes a first plug-in body 410, and a pin 411 is provided at one end of the first plug-in body 410 away from the box body. A first through groove is provided inside the first plug-in body 410 and the pin 411, and the pin 6 is located in the first through groove.

[0056] Specifically, one end of the pin 6 extending into the box body is flat, and the other end of the pin 6 is a hollow socket structure. A drum spring 601 is provided inside the hollow socket structure. Hook portions 412 are symmetrically provided on both sides of the pin 411, and the hook portions 412 are connected to the first plug body 410.

[0057] It should be explained that one end of the above-mentioned pin is designed to be flat, and the flat structure can facilitate its welding with the conductive terminal 51. Of course, the shape here is not limited to flat, and can also be designed into other shapes, such as: cylindrical structure, square structure, etc.

[0058] Specifically, when the connector plug-in component 4 is a male plug-in component 41, the external connector 30 that matches it needs to be a female plug-in component 42 that matches it. When performing the plug-in operation, it is only necessary to insert the pin 411 into the corresponding socket of the external connector 30 to lock the hook portion 412 and the corresponding snap-in hole 422. At the same time, the pin 6 in the photovoltaic junction box is electrically connected to the pin 6 in the external connector 30, that is, the pin 6 in the external connector 30 can be inserted into the hollow socket and clamped by the drum spring 601 to achieve connection.

[0059] In this embodiment, Figure 7 and Figure 8 As shown, the connector plug-in component 4 is a female plug-in component 42, and the female plug-in component 42 includes a second plug-in body 421, and a second through groove is provided inside the second plug-in body 421, and the pin 6 is located in the second through groove.

[0060] Specifically, one end of the plug pin 6 extending into the box body is flat, and the other end of the plug pin 6 is a needle-shaped structure. A group of engaging holes 422 are symmetrically provided at one end of the second plug body 421 away from the box body.

[0061] It should be explained that one end of the above-mentioned pin is designed to be flat, and the flat structure can facilitate its welding with the conductive terminal 51. Of course, the shape here is not limited to flat, and can also be designed into other shapes, such as: cylindrical structure, square structure, etc.

[0062] Specifically, when the connector plug-in component 4 is a female plug-in component 42, the external connector 30 that cooperates with it must be a male plug-in component 41 that cooperates with it. When performing the plug-in operation, it is only necessary to insert the pin 411 of the external connector 30 into the corresponding socket of the external connector 30, so that the hook portion 412 and the corresponding snap-in hole 422 can be snap-locked. At the same time, the pin 6 in the photovoltaic junction box can be electrically connected with the pin 6 in the external connector 30, that is, the pin 6 in the photovoltaic junction box can be inserted into the hollow socket of the pin 6 in the external connector 30, and clamped by the drum spring 601 to achieve connection.

[0063] The arrangement of the male-end plug assembly 41 and the female-end plug assembly 42 can realize the rapid connection between the photovoltaic junction box and the external connector 30, and this connection method has the characteristics of tight and rapid connection.

[0064] In this embodiment, the first plug body 410 and the second plug body 421 are both provided with limiting steps 43 inside for matching with the plug pin 6 .

[0065] Specifically, the above-mentioned limiting step 43 can match the structure of the corresponding plug pin 6, so as to limit the installation position of the plug pin 6, thereby ensuring the installation accuracy of the plug pin 6 and the corresponding connector plug assembly 4.

[0066] The present embodiment also discloses a junction box assembly, using the photovoltaic junction box described above, including a left photovoltaic junction box 10 and a right photovoltaic junction box 20, wherein the connector plug-in assemblies 4 at one end of the left photovoltaic junction box 10 and the right photovoltaic junction box 20 are both male end plug-in assemblies 41, or the connector plug-in assemblies 4 at one end of the left photovoltaic junction box 10 and the right photovoltaic junction box 20 are both female end plug-in assemblies 42, or one of the connector plug-in assemblies 4 at one end of the left photovoltaic junction box 10 and the right photovoltaic junction box 20 is a male end plug-in assembly 41, and the other is a female end plug-in assembly 42;

[0067] It also includes an external connector 30 that is respectively plugged into the left photovoltaic junction box 10 and the right photovoltaic junction box 20, one end of the external connector 30 is connected to a cable 40, and the other end of the external connector 30 is plugged into the left photovoltaic junction box 10 or the right photovoltaic junction box 20.

[0068] Specifically, in some embodiments, a middle photovoltaic junction box 50 is further included, and the middle photovoltaic junction box 50 is located between the left photovoltaic junction box 10 and the right photovoltaic junction box 20 .

[0069] Specifically, the junction box assembly has the following embodiments:

[0070] Embodiment 1: It includes a left photovoltaic junction box 10 and a right photovoltaic junction box 20, wherein the connector plug-in components 4 at one end of the left photovoltaic junction box 10 and the right photovoltaic junction box 20 are both male end plug-in components 41, and the connector plug-in components 4 at one end of the left external connector 30 and the right external connector 30 are both female end plug-in components 42.

[0071] Embodiment 2: It includes a left photovoltaic junction box 10 and a right photovoltaic junction box 20, wherein the connector plug-in components 4 at one end of the left photovoltaic junction box 10 and the right photovoltaic junction box 20 are both female end plug-in components 42, and the connector plug-in components 4 at one end of the left external connector 30 and the right external connector 30 are both male end plug-in components 41.

[0072] Embodiment 3: It includes a left photovoltaic junction box 10 and a right photovoltaic junction box 20, wherein the connector plug-in assembly 4 at one end of the left photovoltaic junction box 10 is a male end plug-in assembly 41, the connector plug-in assembly 4 at one end of the right photovoltaic junction box 20 is a female end plug-in assembly 42, the connector plug-in assembly 4 at one end of the left external connector 30 is a female end plug-in assembly 42, and the connector plug-in assembly 4 at one end of the right external connector 30 is a male end plug-in assembly 41.

[0073] Embodiment 4: comprises a left photovoltaic junction box 10 and a right photovoltaic junction box 20, wherein the connector plug-in assembly 4 at one end of the left photovoltaic junction box 10 is a female end plug-in assembly 42, the connector plug-in assembly 4 at one end of the right photovoltaic junction box 20 is a male end plug-in assembly 41, the connector plug-in assembly 4 at one end of the left external connector 30 is a male end plug-in assembly 41, and the connector plug-in assembly 4 at one end of the right external connector 30 is a female end plug-in assembly 42.

[0074] Embodiment 5: It includes a left photovoltaic junction box 10 and a right photovoltaic junction box 20, and also includes an intermediate photovoltaic junction box 50, wherein the intermediate photovoltaic junction box 50 is located between the left photovoltaic junction box 10 and the right photovoltaic junction box 20, and the connector plug-in components 4 at one end of the left photovoltaic junction box 10 and the right photovoltaic junction box 20 are both male end plug-in components 41, and the connector plug-in components 4 at one end of the left external connector 30 and the right external connector 30 are both female end plug-in components 42.

[0075] Embodiment 6: It includes a left photovoltaic junction box 10 and a right photovoltaic junction box 20, and also includes an intermediate photovoltaic junction box 50, wherein the intermediate photovoltaic junction box 50 is located between the left photovoltaic junction box 10 and the right photovoltaic junction box 20, and the connector plug-in components 4 at one end of the left photovoltaic junction box 10 and the right photovoltaic junction box 20 are both female end plug-in components 42, and the connector plug-in components 4 at one end of the left external connector 30 and the right external connector 30 are both male end plug-in components 41.

[0076] Embodiment 7: It includes a left photovoltaic junction box 10 and a right photovoltaic junction box 20, and also includes an intermediate photovoltaic junction box 50, wherein the intermediate photovoltaic junction box 50 is located between the left photovoltaic junction box 10 and the right photovoltaic junction box 20, the connector plug-in assembly 4 at one end of the left photovoltaic junction box 10 is a male end plug-in assembly 41, the connector plug-in assembly 4 at one end of the right photovoltaic junction box 20 is a female end plug-in assembly 42, the connector plug-in assembly 4 at one end of the left external connector 30 is a female end plug-in assembly 42, and the connector plug-in assembly 4 at one end of the right external connector 30 is a male end plug-in assembly 41.

[0077] Embodiment 8: It includes a left photovoltaic junction box 10 and a right photovoltaic junction box 20, and also includes an intermediate photovoltaic junction box 50, wherein the intermediate photovoltaic junction box 50 is located between the left photovoltaic junction box 10 and the right photovoltaic junction box 20, the connector plug-in assembly 4 at one end of the left photovoltaic junction box 10 is a female end plug-in assembly 42, the connector plug-in assembly 4 at one end of the right photovoltaic junction box 20 is a male end plug-in assembly 41, the connector plug-in assembly 4 at one end of the left external connector 30 is a male end plug-in assembly 41, and the connector plug-in assembly 4 at one end of the right external connector 30 is a female end plug-in assembly 42.

[0078] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A photovoltaic junction box, comprising a box body, wherein an upper cover (1) for buckling with the box body is arranged on the box body, wherein the box body comprises a bottom wall (3) and side walls (2) located around the bottom wall (3), wherein the bottom wall (3), the upper cover (1) and the side walls (2) form a receiving space, wherein a connector plug assembly (4) is arranged on one side of the side wall (2) away from the receiving space, wherein a conductive terminal (51) is arranged in the receiving space, wherein a plug pin (6) is arranged in the connector plug assembly (4), wherein a through hole is arranged on the side wall (2) connected to the connector plug assembly (4), wherein one end of the plug pin (6) passes through the through hole to be electrically connected to the conductive terminal (51), and the other end of the plug pin (6) extends outward, wherein: An extension portion (7) is provided at one end of the bottom wall (3), and the extension portion (7) is located below the connector plug assembly (4).

2. A photovoltaic junction box according to claim 1, characterized in that: Support feet (9) are respectively arranged at the four corners of the bottom surface of the bottom wall (3), wherein two of the support feet (9) are located below the bottom wall extension portion (7).

3. A photovoltaic junction box according to claim 1 or 2, characterized in that: The connector plug-in assembly (4) and the extension portion (7) are connected via a connecting block (8).

4. A photovoltaic junction box according to claim 1, characterized in that: It also includes a bypass protection module, the bypass protection module is provided with the conductive terminal (51), the bypass protection module (5) is arranged in the box body, an anti-mistake notch (501) is provided on an edge side of the bypass protection module (5), and at least one positioning hole (502) is provided on the bypass protection module (5); The surface of the bottom wall (3) is provided with a positioning column (301) matched with the positioning hole (502) and an anti-fool column (302) matched with the anti-fool notch (501).

5. A photovoltaic junction box according to claim 1, characterized in that: The connector plug-in assembly (4) is a male-end plug-in assembly (41), and the male-end plug-in assembly (41) comprises a first plug-in body (410), and a plug pin (411) is provided at one end of the first plug-in body (410) away from the box body, and a first through groove is provided inside the first plug-in body (410) and the plug pin (411), and the plug pin (6) is located in the first through groove.

6. A photovoltaic junction box according to claim 5, characterized in that: One end of the plug pin (6) extending into the box body is flat, and the other end of the plug pin (6) is a hollow socket structure, a drum spring (601) is arranged inside the hollow socket structure, and hook portions (412) are symmetrically arranged on both sides of the plug pin (411), and the hook portions (412) are connected to the first plug body (410).

7. A photovoltaic junction box according to claim 5, characterized in that: The connector plug-in assembly (4) is a female end plug-in assembly (42), and the female end plug-in assembly (42) comprises a second plug-in body (421), a second through slot is provided inside the second plug-in body (421), and the plug pin (6) is located in the second through slot.

8. A photovoltaic junction box according to claim 7, characterized in that: One end of the plug pin (6) extending into the box body is flat, and the other end of the plug pin (6) is a needle-shaped structure. A group of clamping holes (422) are symmetrically arranged at one end of the second plug body (421) away from the box body.

9. A photovoltaic junction box according to claim 1, characterized in that: The connector plug assembly (4) is integrally formed with the box body or connected to the box body by plugging or snapping.

10. A photovoltaic junction box according to claim 7, characterized in that: The first plug-in body (410) and the second plug-in body (421) are both provided with a limiting step (43) on the inner side thereof for matching with the plug pin (6).

11. A junction box assembly, using the photovoltaic junction box according to any one of claims 1 to 10, characterized in that: The invention comprises a plurality of photovoltaic junction boxes, namely a left photovoltaic junction box (10) and a right photovoltaic junction box (20), wherein the connector plug-in components (4) at one end of the left photovoltaic junction box (10) and the right photovoltaic junction box (20) are both male end plug-in components (41), or the connector plug-in components (4) at one end of the left photovoltaic junction box (10) and the right photovoltaic junction box (20) are both female end plug-in components (42), or one of the connector plug-in components (4) at one end of the left photovoltaic junction box (10) and the right photovoltaic junction box (20) is a male end plug-in component (41) and the other is a female end plug-in component (42); It also includes an external connector (30) that is respectively matched with the left photovoltaic junction box (10) and the right photovoltaic junction box (20), one end of the external connector (30) is connected to a cable (40), and the other end of the external connector (30) is plugged into the left photovoltaic junction box (10) or the right photovoltaic junction box (20).

12. The junction box assembly according to claim 11, characterized in that: It also comprises a middle photovoltaic junction box (50), wherein the middle photovoltaic junction box (50) is located between the left photovoltaic junction box (10) and the right photovoltaic junction box (20).

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