Junction box applied to photovoltaic module and photovoltaic module
By setting a docking groove and a matching frame base on the side wall of the photovoltaic module junction box, the problems of high adhesive consumption and overflow are solved, the adhesive is fully contained, and the stability and power generation efficiency of the photovoltaic module are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JA SOLAR NEW ENERGY YANGZHOU CO LTD
- Filing Date
- 2025-05-27
- Publication Date
- 2026-05-08
AI Technical Summary
During the installation of existing photovoltaic module junction boxes, a large amount of adhesive is consumed, and overflow affects power generation performance and appearance, and also results in poor stability.
A mating groove is provided on the side wall of the junction box body, and a matching frame structure base is provided to form a space to accommodate adhesive through snap-fit, thus limiting its overflow.
This reduces the amount of adhesive used, avoids light shading, and improves the stability of the junction box and the overall performance of the photovoltaic modules.
Smart Images
Figure CN224218358U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of photovoltaic module manufacturing technology, and in particular to a junction box and a photovoltaic module for use in photovoltaic modules. Background Technology
[0002] In existing technologies, junction boxes used in photovoltaic modules are typically rectangular in shape. Installation is achieved by applying adhesive to the bottom of the junction box body and pressing it onto the surface of the photovoltaic module. However, during the pressing process, it's impossible to determine whether the adhesive surface at the bottom of the junction box body is completely bonded to the photovoltaic module. Therefore, existing technologies often use an excess of adhesive, observing whether any excess adhesive overflows during pressing to determine if the adhesive has completely filled the gap.
[0003] Therefore, the inventors found that the structure of this junction box caused the following problems during the installation process: (1) the amount of adhesive consumed was large and the utilization rate was low, which increased the actual production cost; (2) the overflowing adhesive would block the battery cells around the junction box body, affecting the power generation performance of the photovoltaic module; (3) the overflowing adhesive affected the overall appearance of the photovoltaic module, requiring additional cleaning work to clean up the overflowing adhesive; (4) even if the adhesive overflowed, it could not be guaranteed that the adhesive completely filled the space between the bonding surface of the junction box body and the photovoltaic module, resulting in poor stability of the junction box body. Utility Model Content
[0004] In view of this, the present invention provides a junction box and a photovoltaic module for use in photovoltaic modules. By setting a docking groove on the side wall of the junction box body and setting a base with a frame structure that matches the docking groove, part of the base can be engaged with the docking groove. The cavity formed by the adhesive surface of the junction box body and the bottom part of the base that is not engaged with the docking groove provides sufficient space for adhesive, limiting the overflow of adhesive to the outer periphery of the junction box body. This not only reduces the amount of adhesive consumed, but also avoids the adhesive from blocking light from the photovoltaic module.
[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:
[0006] In a first aspect, this utility model provides a junction box for photovoltaic modules, comprising: a junction box body and a base; at least one side wall of the junction box body is provided with a mating groove, and the bottom is provided with an adhesive surface; the base is a frame structure that runs vertically through the base, the frame structure matching the mating groove so that the frame structure engages with the mating groove under external force; the adhesive surface of the junction box body and the portion of the bottom of the base that does not engage with the mating groove form a space for accommodating adhesive.
[0007] Optionally, the mating groove is disposed on the inner side of the side wall of the junction box body; or, the mating groove is disposed on the outer side of the side wall of the junction box body.
[0008] Optionally, the docking groove includes a first locking structure; the side wall of the base is provided with a second locking structure; the first locking structure and the second locking structure cooperate to fix the base and the docking groove relatively after they are engaged.
[0009] Optionally, the first locking structure is one or more upwardly inclined first protrusions facing a first direction; the second locking structure is one or more downwardly inclined second protrusions facing a second direction; wherein the first direction is opposite to the second direction.
[0010] Optionally, for cases where the mating groove is located on the inner side wall of the junction box body, in the vertical direction, the height of the frame of the part of the base that engages with the mating groove is less than the total height of the frame, so that the adhesive surface and the bottom part of the base that does not engage with the mating groove form a space for accommodating adhesive.
[0011] In cases where the mating groove is located on the outer side wall of the junction box body, at least one fixing block is also provided on the adhesive surface of the junction box body, so as to use the fixing block to form a space for accommodating adhesive between the adhesive surface and the part of the bottom of the base that is not engaged with the mating groove.
[0012] Optionally, when the docking groove is located on the inner side wall of the junction box body, the difference between the total height of the base frame and the height of the frame of the part of the base that engages with the docking groove is 0.5 to 5 mm.
[0013] When the docking groove is located on the outer side wall of the junction box body, the height of the fixing block is 0.5mm to 5mm.
[0014] Optionally, the mating groove is arranged around all the side walls of the junction box body.
[0015] Optionally, the height of the frame in the base that engages with the mating groove is 10mm to 30mm.
[0016] Optionally, the junction box body and the base are separate structures.
[0017] Secondly, this utility model provides a photovoltaic module, including: any of the above-mentioned junction boxes.
[0018] The first aspect of the above-mentioned utility model has the following advantages or beneficial effects: by setting a docking groove on the side wall of the junction box body and setting a base with a frame structure that matches the docking groove, part of the base can be engaged with the docking groove. The cavity formed by the adhesive surface of the junction box body and the bottom part of the base that is not engaged with the docking groove provides sufficient space for the adhesive, which limits the overflow of the adhesive to the outer periphery of the junction box body. This not only reduces the amount of adhesive consumed, but also avoids the adhesive from blocking the light of the photovoltaic module. Attached Figure Description
[0019] The accompanying drawings are provided to better understand this utility model and do not constitute an undue limitation thereof. Wherein:
[0020] Figure 1 This is a schematic diagram of the overall structure of a junction box applied to a photovoltaic module according to an embodiment of the present utility model;
[0021] Figure 2 This is a schematic diagram of the bottom structure of the junction box body according to an embodiment of the present utility model;
[0022] Figure 3 This is a structural schematic diagram of the base of a junction box body according to an embodiment of the present utility model;
[0023] Figure 4 This is a schematic diagram of the overall structure of another junction box applied to photovoltaic modules according to an embodiment of the present utility model;
[0024] Figure 5 This is a structural schematic diagram illustrating the positional relationship between a first locking structure and a second locking structure according to an embodiment of the present utility model;
[0025] Figure 6 This is a structural schematic diagram showing the positional relationship between a first locking structure and a second locking structure according to an embodiment of the present utility model;
[0026] Figure 7 This is a schematic diagram of a first locking structure provided according to an embodiment of the present utility model;
[0027] Figure 8 This is a schematic diagram of a second locking structure provided according to an embodiment of the present utility model;
[0028] Figure 9 This is a schematic diagram showing the positional relationship of the junction box body and the base in different states when they are separate structures according to the embodiments of this utility model.
[0029] The attached figures are labeled as follows:
[0030] 1- Junction box body; 11- Connecting groove; 111- First locking structure; 12- Busbar guide groove; 2- Base; 21- Second locking structure. Detailed Implementation
[0031] To facilitate and clearly describe the fabrication method and the solar cell of this invention, exemplary embodiments of this invention are described below with reference to the accompanying drawings. These include various details of the embodiments to aid understanding and should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this invention. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.
[0032] Figure 1 This diagram shows the overall structure of a junction box for photovoltaic modules provided in an embodiment of the present invention. Figure 2 This diagram shows a bottom surface structure of a junction box body according to an embodiment of the present invention. Figure 3 A schematic diagram of the structure of the base 2 provided in an embodiment of the present invention is shown.
[0033] like Figures 1 to 3 As shown, the junction box for photovoltaic modules provided by this utility model includes: a junction box body 1 and a base 2; at least one side wall of the junction box body 1 is provided with a mating groove 11, and the bottom is provided with an adhesive surface; the base 2 is a frame structure that runs vertically through the bottom, and the frame structure matches the mating groove 11 so that the frame structure and the mating groove 11 are engaged under the action of external force; the adhesive surface of the junction box body 1 and the part of the bottom of the base 2 that is not engaged with the mating groove 11 form a space for accommodating adhesive.
[0034] The adhesive surface refers to the surface of the junction box body 1 that will be adjacent to the photovoltaic module after installation. It is typically located on the lower surface of the junction box body 1. This is achieved by pressing the junction box body 1 downwards to adhesively bond its lower surface to the photovoltaic module. Figure 1 and Figure 2 As can be seen, by providing a mating groove 11 on at least one side wall of the junction box body 1, and after the top portion of the base 2 engages with the mating groove 11, a relatively enclosed space can be formed between the adhesive surface of the junction box body 1, the bottom portion of the base 2 that is not engaged with the mating groove 11, and the upper surface of the photovoltaic module, thereby limiting the overflow of adhesive. It is understandable that, in order to ensure the bonding strength between the adhesive surface of the junction box body 1 and the photovoltaic module as much as possible, the mating groove 11 should be selected to surround the edge area of the adhesive surface of the junction box body 1, maximizing the contact area between the adhesive and the adhesive surface of the junction box body 1 and the upper surface of the photovoltaic module.
[0035] In one alternative embodiment, in order to ensure the stability of the connection between the junction box body 1 and the base 2 as much as possible, the mating groove 11 is arranged around all the side walls of the junction box body 1.
[0036] Regarding the junction box body 1 mentioned above, generally speaking, such as Figure 1 and Figure 2 As shown, the junction box body 1 is typically a rectangular cuboid structure with an open top, where the cavity is used for soldering electronic components. Therefore, in the following embodiments, the structure of the junction box body 1 with an open top and a rectangular cuboid structure is mainly described. For junction box bodies 1 with other structures or shapes, the matching between the junction box body 1 and the base 2 can be achieved by adjusting the shape or structure of the base 2 accordingly.
[0037] In one alternative embodiment, such as Figure 2 As shown, the mating groove 11 is disposed on the inner side wall of the junction box body 1. In another optional embodiment, as... Figure 4 As shown, the mating groove 11 is located on the outer side wall of the junction box body 1. It can be understood that regardless of whether the mating groove 11 is located inside or outside the side wall of the junction box body 1, the movement space of the adhesive is restricted through the engagement between the mating groove 11 and the base 2. (Comparison) Figure 2 and Figure 4 It can be seen that, compared to setting the mating groove 11 inside the side wall of the junction box body 1, setting the mating groove 11 outside the side wall of the junction box body 1 can minimize the probability that the adhesive coated on the bonding surface of the junction box body 1 will enter the mating groove 11 under the action of external force, thereby further reducing the amount of adhesive consumed.
[0038] In this utility model, in order to ensure the stability of the connection between the junction box body 1 and the base 2, in an optional embodiment, the docking groove 11 includes a first locking structure 111; a second locking structure 21 is provided on the side wall of the base 2; the first locking structure 111 and the second locking structure 21 cooperate to make the base 2 and the docking groove 11 locked together and relatively fixed.
[0039] The following is a detailed description of the structure in which the mating groove 11 is located on the inner side wall of the junction box body 1. In this case, the first locking structure 111 can be located on the inner surface of the mating groove 11. Exemplarily, the location and specific structure of the first locking structure 111 and the second locking structure 21 can be as follows: Figure 5 and Figure 6 As shown, where, Figure 5 and Figure 6 The examples all use the case where the mating groove 11 is located inside the side wall of the junction box body 1 as an example. Figure 5 and Figure 6 All along Figure 1 A schematic diagram of the cross-sectional structure obtained by cutting along the AA direction, specifically... Figure 5 This illustrates the positional relationship between the first locking structure 111 and the second locking structure 21 when the base 2 is not inserted into the docking groove 11. Figure 6 This illustration shows the positional relationship between the first locking structure 111 and the second locking structure 21 after the base 2 is inserted into the docking groove 11. Figure 5 and Figure 6 It can be seen that the cooperation between the first locking structure 111 and the second locking structure 21 ensures that the base 2 can only be inserted into the docking groove 11 in one direction and cannot be pulled out in the opposite direction after insertion. This is because when the junction box body 1 is subjected to an external force from top to bottom, the adhesive coated on the bottom of the junction box body 1 will be squeezed. Adhesive generally has a certain deformation capacity and liquid tension. When the external force is removed, the weight of the junction box body 1 itself may not be enough to offset the deformation recovery force of the adhesive. If the junction box body 1 is not relatively fixed with the base 2, the junction box body 1 will rebound upward under the deformation recovery force of the adhesive. This will cause the adhesive to fail to form an effective bond with the bonding surface of the junction box body 1, thus affecting the bonding firmness. Therefore, in this embodiment of the utility model, the cooperation between the first locking structure 111 and the second locking structure 21 can achieve relative fixation between the junction box body 1 and the base 2 after the base 2 is inserted into the docking groove 11, thereby ensuring the bonding performance.
[0040] Similarly, for the structure where the mating groove 11 is located on the outer side wall of the junction box body 1, such as... Figure 4As shown, the first locking structure 111 is actually exposed on the outside of the junction box body 1, therefore the size of the base 2 needs to be larger than the outer contour size of the junction box body 1. It is understandable that, under this structure, after the junction box body 1 and the base 2 are engaged, sufficient space needs to be left on the adhesive surface of the junction box body 1 to accommodate the adhesive. Therefore, in an optional embodiment, for the case where the mating groove 11 is located on the outside of the side wall of the junction box body 1, at least one fixing block is also provided on the adhesive surface of the junction box body 1, so as to use the fixing block to form a space for accommodating the adhesive between the adhesive surface and the bottom part of the base 2 that is not engaged with the mating groove 11. Understandably, without the constraint of the fixing blocks, the junction box body 1 will continuously snap downwards until it abuts against the surface of the photovoltaic module, leaving insufficient space for the adhesive. Therefore, at least one fixing block needs to be provided on the bonding surface of the junction box body 1. As the junction box body 1 gradually snaps downwards, and the fixing block contacts the surface of the photovoltaic module, the junction box body 1 cannot continue to snap downwards, thereby confining the adhesive within the space supported by the fixing block. For example, to ensure the uniformity of adhesive contained in each area of the bonding surface of the junction box body 1, multiple fixing blocks can be arranged around the bonding surface of the junction box body 1 to ensure that each area of the bonding surface of the junction box body 1 is effectively supported by the fixing blocks. In a further optional embodiment, when the mating groove 11 is located on the outer side wall of the junction box body 1, the height of the fixing block is 0.5mm to 5mm, preferably 1mm to 3mm, such as 1.5mm, 2mm, 2.5mm, etc. The inventors discovered that when the height of the fixing block is set to 0.5mm to 5mm, it is possible to bond the junction box body 1 to the photovoltaic module without using too much adhesive, while ensuring the bonding performance between the junction box body 1 and the photovoltaic module.
[0041] In one optional embodiment, for the first locking structure 111 and the second locking structure 21, the first locking structure 111 is one or more upwardly inclined first protrusions facing a first direction; the second locking structure 21 is one or more downwardly inclined second protrusions facing a second direction; wherein the first direction is opposite to the second direction. For example, as... Figure 7 and Figure 8 As shown, where, Figure 7 This is a schematic diagram of one possible structure of the first locking structure 111. Figure 8 This is a schematic diagram of one possible structure of the second locking structure 21. From... Figure 7 and Figure 8It can be seen that when the first protrusion faces to the right (first direction), the second protrusion faces to the left (second direction). That is, the first direction and the second direction must be opposite to each other in order for the first protrusion and the second protrusion to form an interlocking shape. At the same time, the different tilt directions of the first protrusion and the second protrusion are used to ensure the relatively fixed state between the junction box body 1 and the base 2.
[0042] Understandably, in practical applications, the required amount of adhesive can be calculated in advance, and the frame height of the base 2 and the groove depth of the mating groove 11 (i.e., the height of the part where the mating groove 11 and the base 2 engage) can be set based on the required amount of adhesive. This ensures that after the base 2 is inserted into the mating groove 11, the top of the base 2 abuts against the mating groove 11, meaning the base 2 is completely embedded in the mating groove 11. Therefore, when pressing the junction box body 1, there is no need to consider the position of the junction box body 1 after pressing; it can be pressed directly to the lowest position. In this case, one first protrusion and one second protrusion can be provided respectively. That is, one first protrusion is provided at the deepest point of the mating groove 11, and one second protrusion is provided at the top of the side wall of the base 2. When the first and second protrusions engage, it indicates that the base 2 is completely embedded in the mating groove 11. In another optional embodiment, the operator needs to determine the pressing position of the junction box body 1 based on the actual amount of adhesive applied. In this case, the total number of the first and second protrusions needs to be no less than three. In a further optional embodiment, the number of first protrusions is one or more, and the number of second protrusions is multiple; or, the number of first protrusions is multiple, and the number of second protrusions is one or more. Since different pressing positions of the junction box body 1 need to be selected according to the amount of adhesive applied, multiple first protrusions need to be set at different depths of the mating groove 11 or multiple second protrusions need to be set at different positions on the side wall of the base 2. Based on actual needs, they can be released from external force at appropriate positions, so that the junction box body 1 and the base 2 can be fixed in different relative positions, and different sizes of accommodating space are left for the adhesive.
[0043] As mentioned earlier, in order to limit the outward overflow of adhesive, it is necessary to ensure that the portion of the base 2 not embedded in the mating groove 11 can form a receiving space with the adhesive surface of the junction box body 1. Therefore, in a further optional embodiment, when the mating groove 11 is located on the inner side wall of the junction box body 1, in the vertical direction, the frame height of the portion of the base 2 that engages with the mating groove 11 is less than the total height of the frame, so that the adhesive surface and the bottom portion of the base 2 not engaged with the mating groove 11 form a space for receiving adhesive. However, when the mating groove 11 is located on the outer side wall of the junction box body 1, since the adhesive receiving space is not determined by the height of the portion of the base 2 engaged with the mating groove 11, the frame height of the portion of the base 2 engaged with the mating groove 11 can be equal to the total height of the frame. Therefore, in one optional embodiment, the frame height of the part of the base 2 that engages with the docking groove 11 is 10mm to 30mm, for example, 10mm, 20mm, 30mm, etc.; the height of the base 2 in the vertical direction is 10mm to 30mm, for example, 10mm, 20mm, 30mm, etc.
[0044] When the docking groove 11 is located on the inner side wall of the junction box body 1, the difference between the total height of the base 2 frame and the height of the frame of the part of the base 2 that engages with the docking groove 11 is 0.5 to 5 mm. The inventors have discovered that when the difference between the total height of the base 2 frame and the height of the frame of the part of the base 2 that engages with the docking groove 11 is greater than 1 mm and less than 3 mm, excessive adhesive is not required, while ensuring the bonding performance between the junction box body 1 and the photovoltaic module. Therefore, in a further optional embodiment of this invention, the difference between the total height of the base 2 frame and the height of the frame of the part of the base 2 that engages with the docking groove 11 is preferably greater than 1 mm and less than 3 mm, for example, 1.5 mm, 2 mm, 2.5 mm, etc.
[0045] In one alternative embodiment, such as Figure 2 As shown, the bonding surface of the junction box body 1 is also provided with a busbar guide groove 12; the cross-sectional shape of the busbar guide groove 12 matches the cross-sectional shape of the busbar in the photovoltaic module used in the junction box. In order to extract the current from the photovoltaic module, a busbar guide groove 12 is provided for the busbar in the photovoltaic module, so that after the busbar is inserted into the cavity of the junction box body 1 from the busbar guide groove 12 on the back side of the junction box body 1, it can be soldered with other electronic components inside the cavity, thereby realizing the extraction of current.
[0046] It is understood that the junction box body 1 and base 2 provided by this utility model can be an integral structure, that is, the base 2 itself has a part that engages with the docking groove 11, but the engaging part is relatively small. In use, it is only necessary to apply adhesive to the bottom surface of the junction box body 1 with the base 2 engaged, and then directly press the junction box body 1 at the position where the photovoltaic module needs to be installed. In another optional embodiment, the junction box body 1 and base 2 can also be a separate structure, that is, in use, the base 2 needs to be placed in the required installation position of the photovoltaic module first, and then adhesive is applied to the bottom of the junction box body 1, and then the junction box body 1 with adhesive applied is pressed against the base 2.
[0047] The following is based on Figure 9 For example, the positional relationship of the junction box body 1 and the base 2 in different states when they are separate structures is illustrated. Figure 9 As shown, in the uninstalled state (as shown in (a)), the junction box body 1 and the base 2 are not connected to each other and are two independent parts. When installation is required, the base 2 is first placed on the required installation position of the photovoltaic module, and then the mating groove 11 in the junction box body 1, whose bottom surface is coated with adhesive, is pressed down to the position of the base 2, so that the base 2 is gradually embedded into the mating groove 11 from top to bottom (as shown in (b)). With the continuous pressing, the adhesive gradually fills the space between the adhesive surface of the junction box body 1 and the part of the base 2 that is not embedded in the mating groove 11. When the junction box body 1 is subjected to pressing resistance, it indicates that the adhesive has completely filled the space. At this time, the junction box body 1 and the base 2 are relatively fixed, forming the final structure of the junction box as shown in (c).
[0048] In summary, the junction box for photovoltaic modules provided by this utility model embodiment, by setting a docking groove on the side wall of the junction box body and setting a base with a frame structure that matches the docking groove, allows part of the base to engage with the docking groove. The cavity formed by the adhesive surface of the junction box body and the bottom part of the base that does not engage with the docking groove provides sufficient space for adhesive, limiting the overflow of adhesive to the outer periphery of the junction box body. This not only reduces the consumption of adhesive but also avoids the adhesive from blocking light from the photovoltaic modules.
[0049] In addition, this utility model also provides a photovoltaic module, including any of the aforementioned junction boxes. By setting up the junction box, the overall performance of the photovoltaic module can be effectively improved, and the aesthetic appearance of the photovoltaic module can also be enhanced.
[0050] The above steps are provided only to help understand the structure, method, and core idea of this utility model. For those skilled in the art, various improvements and modifications can be made to this utility model without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims of this utility model.
Claims
1. A junction box for use in photovoltaic modules, characterized in that, include: Junction box body (1) and base (2); At least one side wall of the junction box body (1) is provided with a mating groove (11), and the bottom is provided with an adhesive surface; The base (2) is a frame structure that runs vertically through the base. The frame structure matches the docking groove (11) so that the frame structure and the docking groove (11) can be engaged under the action of external force. The adhesive surface of the junction box body (1) and the part of the bottom of the base (2) that is not engaged with the mating groove (11) form a space for accommodating adhesive.
2. The junction box according to claim 1, characterized in that, The docking groove (11) is disposed on the inner side wall of the junction box body (1); or, The docking groove (11) is located on the outer side wall of the junction box body (1).
3. The junction box according to claim 2, characterized in that, The docking groove (11) includes a first locking structure (111); A second locking structure (21) is provided on the side wall of the base (2); The first locking structure (111) cooperates with the second locking structure (21) to fix the base (2) and the docking groove (11) in a relatively fixed manner.
4. The junction box according to claim 3, characterized in that, The first locking structure (111) is one or more upwardly inclined first protrusions facing a first direction; The second locking structure (21) is one or more downwardly inclined second protrusions facing a second direction; Wherein, the first direction is opposite to the second direction.
5. The junction box according to any one of claims 2-4, characterized in that, In the case where the docking groove (11) is located on the inner side wall of the junction box body (1), in the vertical direction, the frame height of the part of the base (2) that engages with the docking groove (11) is less than the total height of the frame, so that the adhesive surface and the part of the bottom of the base (2) that does not engage with the docking groove (11) form a space for accommodating adhesive. In the case where the docking groove (11) is located on the outside of the side wall of the junction box body (1), at least one fixing block is also provided on the bonding surface of the junction box body (1) so as to use the fixing block to make the bonding surface and the part of the bottom of the base (2) that is not engaged with the docking groove (11) form a space for accommodating adhesive.
6. The junction box according to claim 5, characterized in that, When the docking groove (11) is located on the inner side wall of the junction box body (1), the difference between the total frame height of the base (2) and the frame height of the part of the base (2) that engages with the docking groove (11) is 0.5 to 5 mm. When the docking groove (11) is located on the outside of the side wall of the junction box body (1), the height of the fixing block is 0.5mm to 5mm.
7. The junction box according to any one of claims 1-4, characterized in that, The docking groove (11) is arranged around all the side walls of the junction box body (1).
8. The junction box according to any one of claims 1-4, characterized in that, The height of the frame of the part of the base (2) that engages with the docking groove (11) is 10mm to 30mm.
9. The junction box according to any one of claims 1-4, characterized in that, The junction box body (1) and the base (2) are separate structures.
10. A photovoltaic module, characterized in that, Includes the junction box as described in any one of claims 1 to 9.