Photovoltaic junction box

Abstract

The embodiment of the present application relates to the photovoltaic technical field, provide a kind of photovoltaic terminal box, including conducting device, conducting device includes mutually connected conducting piece and first clamping portion;Diode device, diode device includes mutually connected diode assembly and the second clamping portion for with first clamping portion clamping cooperation, to make conducting piece and diode assembly electrically connected when first clamping portion and second clamping portion clamping cooperation;Wherein, one of first clamping portion and second clamping portion is clamping slot, and the other of first clamping portion and second clamping portion is clamping protrusion, and conducting device is provided with observation hole, to make clamping piece be located in observation hole when first clamping portion and second clamping portion clamping cooperation.The photovoltaic terminal box provided in the embodiment of the present application can at least realize the quick installation and replacement of diode device, reduce maintenance time and cost, and also can avoid the risk of thermal breakdown of diode assembly, so that the thermal breakdown failure rate is reduced.

Description

Technical Field

[0001] This application relates to the field of photovoltaic technology, and in particular to a photovoltaic junction box. Background Technology

[0002] Currently, diodes are typically encapsulated inside junction boxes, integrated with conductive copper sheets and sealed with potting compound to achieve waterproofing and a robust electrical connection. If a diode malfunctions, the entire junction box must be disassembled to replace it. This process is not only time-consuming but also requires specialized personnel, increasing maintenance labor and downtime costs. Furthermore, during photovoltaic module operation, the conductive copper sheets generate heat due to current flow, which is directly conducted to the adjacent diode. In high-temperature environments, especially when the junction box is under continuous full load, the diode's operating temperature may exceed its safe range, leading to thermal breakdown and reducing its reliability and lifespan. Summary of the Invention

[0003] This application provides a photovoltaic junction box that at least solves the problem in the prior art where the diode is prone to thermal breakdown due to the integration of the diode and the thermally conductive copper sheet.

[0004] According to some embodiments of this application, this application provides a photovoltaic junction box, including: a conductive device, the conductive device including interconnected conductive elements and a first snap-fit ​​portion; a diode device, the diode device including interconnected diode assemblies and a second snap-fit ​​portion for snapping into the first snap-fit ​​portion, so that the conductive elements and the diode assemblies are electrically connected when the first snap-fit ​​portion and the second snap-fit ​​portion are snapped into each other; wherein, one of the first snap-fit ​​portion and the second snap-fit ​​portion is a snap-fit ​​through groove, and the other of the first snap-fit ​​portion and the second snap-fit ​​portion is a snap-fit ​​protrusion; the diode device is provided with a snap-fit ​​element, and the conductive device is provided with an observation hole penetrating the inside and outside of the housing of the conductive device, so that when the first snap-fit ​​portion and the second snap-fit ​​portion are snapped into each other, the snap-fit ​​element is located in the observation hole.

[0005] Furthermore, the photovoltaic junction box also includes a first conductive rod segment and a second conductive rod segment. The first conductive rod segment is electrically connected to the conductive component and is at least partially located at the first snap-fit ​​portion. The second conductive rod segment is electrically connected to the diode assembly and is at least partially located at the second snap-fit ​​portion. At least a portion of the first conductive rod segment is plugged into at least a portion of the second conductive rod segment.

[0006] Furthermore, the photovoltaic junction box also includes a conductive elastic element, which is sleeved on the connection end between the first conductive rod segment and the second conductive rod segment. The second conductive rod segment is provided with a receiving groove for accommodating the first conductive rod segment. The conductive elastic element can undergo elastic deformation to abut against the groove wall.

[0007] Furthermore, the conductive device includes a first main body and a first disconnect portion connected to the first main body, and a conductive element is disposed within the first main body. The diode device includes a second main body and a second disconnect portion connected to the second main body, and a diode assembly is disposed on the second main body. At least a portion of the first disconnect portion is used to form a first snap-fit ​​portion, and at least a portion of the second disconnect portion is used to form a second snap-fit ​​portion. The second disconnect portion is inserted into the first disconnect portion or the first disconnect portion is inserted into the second disconnect portion, so that the first snap-fit ​​portion and the second snap-fit ​​portion engage in a snap-fit ​​relationship.

[0008] Furthermore, a snap-fit ​​recess is provided on the circumferential groove wall of the snap-fit ​​groove. The snap-fit ​​recess is the snap-fit ​​point of the first snap-fit ​​part and the second snap-fit ​​part. The snap-fit ​​recess is recessed in the radial direction of the snap-fit ​​groove in a direction away from the central axis of the snap-fit ​​groove. A snap-fit ​​protrusion is provided on the circumferential outer wall of the snap-fit ​​protrusion. The snap-fit ​​protrusion is inserted into the snap-fit ​​recess and snaps with the snap-fit ​​recess.

[0009] Furthermore, the snap-fit ​​protrusion is an annular limiting protrusion. Along the extending direction of the snap-fit ​​protrusion, the annular limiting protrusion has a first end and a second end that are disposed opposite to each other. The first end is disposed away from the first main body or the second main body relative to the second end. From the first end to the second end, the distance between the annular outer wall of the annular limiting protrusion and the circumferential outer wall of the snap-fit ​​protrusion gradually increases.

[0010] Furthermore, along the extension direction of the snap-fit ​​groove, the snap-fit ​​recess has a first groove wall and a second groove wall that are disposed opposite to each other. The first groove wall is disposed away from the first main body or the second main body relative to the second groove wall. The second end of the snap-fit ​​protrusion abuts against the second groove wall so that the snap-fit ​​recess snaps against the snap-fit ​​protrusion.

[0011] Furthermore, the snap-fit ​​protrusion includes a first protruding rod segment and a second protruding rod segment arranged sequentially along the extension direction of the snap-fit ​​protrusion. The axial cross-sectional area of ​​the first protruding rod segment is smaller than that of the second protruding rod segment. The second protruding rod segment is connected to the first main body or the second main body. A snap-fit ​​protrusion is provided on the first protruding rod segment. A sealing ring is provided between the snap-fit ​​protrusion and the second protruding rod segment. The circumferential outer wall of the sealing ring abuts against the inner wall of the snap-fit ​​groove.

[0012] Furthermore, there are two first conductive rod segments and two second conductive rod segments, with each pair of the first conductive rod segments and the two second conductive rod segments corresponding to each other; there are also two first locking parts and two locking parts, with each pair of the first conductive rod segments and the first locking parts corresponding to each other, and each pair of the second conductive rod segments and the two second locking parts corresponding to each other.

[0013] Furthermore, the first conductive rod segment and the first snap-fit ​​portion are integrally injection molded, or the first conductive rod segment and the first snap-fit ​​portion are plug-in connected.

[0014] The technical solution provided in this application has at least the following advantages: The photovoltaic junction box includes a conductive device and a diode device. The conductive device includes interconnected conductive parts and a first snap-fit ​​part. The diode device includes interconnected diode assemblies and a second snap-fit ​​part for engaging with the first snap-fit ​​part. The independently configured conductive device and diode device engage with each other through the first and second snap-fit ​​parts, electrically connecting the conductive parts and diode assemblies. This allows for quick connection and disconnection of the conductive device and diode device without tools, simplifying the assembly process, reducing installation time, and facilitating the replacement and maintenance of the diode device. Simultaneously, the conductive device and diode device are no longer integrated into a single design, preventing the heat generated by the conductive parts from being directly conducted to the diode assembly, thus avoiding excessively high operating temperatures of the diode assembly. This solves the problem of thermal breakdown in diodes caused by the integration of the diode with the heat-conducting copper sheet in the prior art. Furthermore, the observation hole allows installers to visually confirm the engagement of the first and second snap-fit ​​parts. Attached Figure Description

[0015] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Unless otherwise stated, the drawings in the accompanying drawings do not constitute a limitation on scale. In order to more clearly illustrate the technical solutions in the embodiments of this application or in the conventional art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a perspective view of an embodiment of a photovoltaic junction box according to this application;

[0017] Figure 2 This is a structural schematic diagram of the diode device, the first conductive rod segment, the second conductive rod segment, and the snap-fit ​​component of a photovoltaic junction box according to the present application, at the first angle.

[0018] Figure 3 This is a schematic diagram of the diode device, first conductive rod segment, second conductive rod segment, and snap-fit ​​component of a photovoltaic junction box according to the present application, taken from a second angle.

[0019] Figure 4 This is a structural schematic diagram of the diode assembly, the first conductive rod segment, and the second conductive rod segment of a photovoltaic junction box according to this application;

[0020] Figure 5 This is a schematic diagram of the first conductive rod segment and the conductive elastic element of a photovoltaic junction box according to this application.

[0021] 1. Conductive device; 10. Conductive component; 2. Observation hole; 3. Diode device; 4. Diode assembly; 30. Snap-fit ​​protrusion; 41. First conductive rod segment; 42. Second conductive rod segment; 43. Conductive elastic component; 101. Second detachment part; 102. Second main body part; 31. First end; 32. Second end; 103. First protruding rod segment; 104. Second protruding rod segment; 50. Sealing ring; 111. First main body part; 112. First detachment part; 105. Snap-fit ​​protrusion; 9. Snap-fit ​​component. Detailed Implementation

[0022] As the background technology indicates, photovoltaic (PV) junction boxes are a key target for the rapid development of energy storage systems. To ensure the safety and efficiency of PV junction boxes under high-power operation, it is necessary to effectively dissipate the heat generated during operation. However, current immersion cooling methods for PV junction boxes suffer from poor cooling performance on the upper part of the battery module.

[0023] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0024] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0025] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A exists, A and B exist simultaneously, and B exists. In addition, the character " / " in this document generally indicates that the related objects before and after it have an "or" relationship.

[0026] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0027] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0028] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0029] In the accompanying drawings corresponding to the embodiments of this application, the thickness and area of ​​the layers are enlarged for better understanding and ease of description. When describing a component (such as a layer, film, region, or substrate) on or on the surface of another component, the component may be "directly" located on the surface of the other component, or there may be a third component between the two components. Conversely, when describing a component on the surface of another component, or when another component is formed or disposed on the surface of a component, it indicates that there is no third component between the two components. Furthermore, when describing a component as being "generally" formed on another component, it means that the component is not formed on the entire surface (or front surface) of the other component, nor is it formed on a portion of the edge of the entire surface.

[0030] In the description of the embodiments of this application, when a component "includes" another component, other components are not excluded unless otherwise stated, and other components may be further included. Furthermore, when a component such as a layer, film, region, or plate is referred to as being "on / located" on another component, it can be "directly on" the other component (i.e., located on the surface of the other component with no other components between them), or it can have another component present in between. Moreover, when a component such as a layer, film, region, or plate is "directly located" on another component, or when a component such as a layer, film, region, or plate is located on the surface of another component, it indicates that no other components are located in between.

[0031] The terminology used in the description of the various embodiments herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used in the description of the various embodiments and the appended claims, the term "part" is also intended to include the plural form unless the context clearly indicates otherwise. Components include layers, films, regions, or plates, etc.

[0032] The embodiments of this application will now be described in detail with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the embodiments of this application to facilitate a better understanding of the application. However, the technical solutions claimed in this application can be implemented even without these technical details and various variations and modifications based on the following embodiments.

[0033] like Figures 1 to 5 This application provides a photovoltaic junction box, including: a conductive device 1, which includes a conductive element 10 and a first snap-fit ​​portion connected to each other; a diode device 3, which includes a diode assembly 4 connected to each other and a second snap-fit ​​portion for snapping into the first snap-fit ​​portion, so that the conductive element 10 and the diode assembly 4 are electrically connected when the first snap-fit ​​portion and the second snap-fit ​​portion are snapped into each other; wherein, one of the first snap-fit ​​portion and the second snap-fit ​​portion is a snap-fit ​​through groove, and the other of the first snap-fit ​​portion and the second snap-fit ​​portion is a snap-fit ​​protrusion 105; the diode device 3 is provided with a snap-fit ​​element 9; and the conductive device 1 is provided with an observation hole 2 penetrating the inside and outside of the housing of the conductive device 1, so that when the first snap-fit ​​portion and the second snap-fit ​​portion are snapped into each other, the snap-fit ​​element 9 is located in the observation hole 2.

[0034] The photovoltaic junction box provided in this application includes a conductive device 1 and a diode device 3. The conductive device 1 includes an interconnected conductive element 10 and a first snap-fit ​​portion. The diode device 3 includes an interconnected diode assembly 4 and a second snap-fit ​​portion for engaging with the first snap-fit ​​portion. The independently configured conductive device 1 and diode device 3 engage with each other through the first and second snap-fit ​​portions, electrically connecting the conductive element 10 and the diode assembly 4. This allows for quick connection and disconnection of the conductive device 1 and diode device 3 without tools, simplifying the assembly process, reducing installation time, and facilitating the replacement and maintenance of the diode device 3. Furthermore, the conductive device 1 and diode device 3 are no longer integrated into a single design, and the heat generated by the conductive element 10 is no longer directly conducted to the diode assembly 4, preventing the diode assembly 4 from overheating. This solves the problem in the prior art where the diode is easily thermally broken down due to its integration with the heat-conducting copper sheet. In addition, the observation hole 2 allows installers to visually confirm the engagement of the first and second snap-fit ​​parts. When the installer sees the snap-fit ​​part 9 inside the observation hole 2, they can confirm that the first and second snap-fit ​​parts are successfully engaged.

[0035] Specifically, the conductive component 10 is a conductive copper sheet. By separating the diode device 3 from the conductive device 1, the diode device 3 can be detachably connected to the conductive device 1, enabling rapid installation and replacement of the diode device 3. This reduces maintenance time from several hours in traditional solutions to less than a few minutes. Separating the diode device 3 from the conductive device 1 also cuts off the heat transfer path from the conductive component 10 to the diode assembly 4, avoiding the risk of thermal breakdown of the diode assembly 4 and reducing the thermal breakdown failure rate. Furthermore, the photovoltaic junction box provided in this embodiment supports rapid replacement of diode devices of different specifications, adapting to various photovoltaic module scenarios.

[0036] In the embodiments of this application, the photovoltaic junction box further includes a first conductive rod segment 41 and a second conductive rod segment 42. The first conductive rod segment 41 is electrically connected to the conductive member 10 and is at least partially located at the first snap-fit ​​portion. The second conductive rod segment 42 is electrically connected to the diode assembly 4 and is at least partially disposed at the second snap-fit ​​portion. At least a portion of the first conductive rod segment 41 is plugged into at least a portion of the second conductive rod segment 42.

[0037] Specifically, the second conductive rod segment 42 is electrically connected to the diode assembly 4 and is at least partially disposed at the second snap-fit ​​portion. At least a portion of the first conductive rod segment 41 is plugged into at least a portion of the second conductive rod segment 42. When the first snap-fit ​​portion and the second snap-fit ​​portion engage, at least a portion of the first conductive rod segment 41 is plugged into at least a portion of the second conductive rod segment 42. This effectively achieves a low-impedance electrical connection between the diode assembly 4 and the conductive element 10, preventing the heat generated by the conductive element 10 from being directly conducted to the diode assembly 4 and avoiding excessively high operating temperatures of the diode assembly 4. At the same time, since at least a portion of the first conductive rod segment 41 is plugged into at least a portion of the second conductive rod segment 42, if the diode assembly 4 fails, maintenance personnel only need to disconnect the plug-in connection between the first conductive rod segment 41 and the second conductive rod segment 42 to quickly replace the diode assembly 4 without disassembling the entire photovoltaic junction box. This not only simplifies the assembly process of the photovoltaic junction box but also greatly improves the convenience of maintenance.

[0038] In the embodiments of this application, the photovoltaic junction box further includes a conductive elastic element 43, which is sleeved on the connection end between the first conductive rod segment 41 and the second conductive rod segment 42. The second conductive rod segment 42 is provided with a receiving groove for accommodating the first conductive rod segment 41. The conductive elastic element 43 can undergo elastic deformation to abut against the groove wall of the receiving groove.

[0039] Specifically, the conductive elastic element 43 is sleeved on the connecting end of the first conductive rod segment 41. In its natural state, the conductive elastic element 43 maintains a certain preload. When the first conductive rod segment 41 is inserted into the receiving groove of the second conductive rod segment 42, the conductive elastic element 43 undergoes elastic deformation and makes full contact with the groove wall. This ensures that even in environments with frequent vibrations or temperature changes in the photovoltaic junction box, the electrical connection between the first conductive rod segment 41 and the second conductive rod segment 42 will not be affected by poor physical contact. The preload of the elastic element ensures continuous and reliable electrical contact between the first conductive rod segment 41 and the second conductive rod segment 42, thereby ensuring a reliable electrical connection between the conductive element 10 and the diode assembly 4.

[0040] In the embodiments of this application, the conductive device 1 includes a first main body 111 and a first disconnect portion 112 connected to the first main body 111. The conductive member 10 is disposed in the first main body 111. The diode device 3 includes a second main body 102 and a second disconnect portion 101 connected to the second main body 102. The diode assembly 4 is disposed on the second main body 102. At least a portion of the first disconnect portion 112 is used to form a first snap-fit ​​portion. At least a portion of the second disconnect portion 101 is used to form a second snap-fit ​​portion. The second disconnect portion 101 is inserted into the first disconnect portion 112 or the first disconnect portion 112 is inserted into the second disconnect portion 101 so that the first snap-fit ​​portion and the second snap-fit ​​portion engage in a snap-fit ​​cooperation.

[0041] Specifically, by inserting the second disconnecting part 101 into the first disconnecting part 112 or inserting the first disconnecting part 112 into the second disconnecting part 101, the first snap-fit ​​part and the second snap-fit ​​part can be quickly snapped together or separated, ensuring that the replacement of the diode assembly 4 no longer requires the complete disassembly of the photovoltaic junction box. The diode device 3 can be disassembled or installed with simple operation, which greatly shortens the maintenance time and reduces the operation and maintenance cost.

[0042] In one of the above embodiments, at least a portion of the first disassembly portion 112 is used to form a first snap-fit ​​portion, and at least a portion of the second disassembly portion 101 is used to form a second snap-fit ​​portion. The first snap-fit ​​portion is a snap-fit ​​through groove, and the second snap-fit ​​portion is a snap-fit ​​protrusion 105. The second disassembly portion 101 is inserted into the first disassembly portion 112 so that the first snap-fit ​​portion and the second snap-fit ​​portion engage in a snap-fit ​​cooperation.

[0043] In another embodiment described above, at least a portion of the first disassembly portion 112 is used to form a first snap-fit ​​portion, and at least a portion of the second disassembly portion 101 is used to form a second snap-fit ​​portion. The second snap-fit ​​portion is a snap-fit ​​through groove, and the first snap-fit ​​portion is a snap-fit ​​protrusion 105. The first disassembly portion 112 is inserted into the second disassembly portion 101 so that the first snap-fit ​​portion and the second snap-fit ​​portion engage in a snap-fit ​​cooperation.

[0044] Specifically, the first disassembly part 112 is provided with an observation hole 2, and the second disassembly part 101 is provided with a snap-fit ​​component 9.

[0045] In the embodiments of this application, a snap-fit ​​recess is provided on the circumferential groove wall of the snap-fit ​​groove. The snap-fit ​​recess is the snap-fit ​​point of the first snap-fit ​​part and the second snap-fit ​​part. The snap-fit ​​recess is recessed in the radial direction of the snap-fit ​​groove toward the direction away from the central axis of the snap-fit ​​groove. A snap-fit ​​protrusion 30 is provided on the circumferential outer wall of the snap-fit ​​protrusion 105. The snap-fit ​​protrusion 30 is inserted into the snap-fit ​​recess and snaps with the snap-fit ​​recess.

[0046] Specifically, by inserting the snap-fit ​​protrusion 30 into the snap-fit ​​recess and snapping it in place, the reliability of the snap-fit ​​engagement between the first snap-fit ​​part and the second snap-fit ​​part is ensured under various environmental conditions, preventing the connection between the first snap-fit ​​part and the second snap-fit ​​part from becoming loose, thereby ensuring a reliable electrical connection between the conductive part 10 and the diode assembly 4.

[0047] In other embodiments of this application, a reliable connection is achieved between the first snap-fit ​​portion and the second snap-fit ​​portion using a screw or other connecting member to prevent loosening of the connection between the first snap-fit ​​portion and the second snap-fit ​​portion. Specifically, a screw is passed through the first snap-fit ​​portion and the second snap-fit ​​portion to achieve a reliable connection between them.

[0048] In the embodiments of this application, the snap-fit ​​protrusion 30 is an annular limiting protrusion. Along the extending direction of the snap-fit ​​protrusion 105, the annular limiting protrusion has a first end 31 and a second end 32 disposed opposite to each other. The first end 31 is disposed away from the first main body 111 or the second main body 102 relative to the second end 32. From the first end 31 to the second end 32, the distance between the annular outer wall of the annular limiting protrusion and the circumferential outer wall of the snap-fit ​​protrusion 105 gradually increases.

[0049] Specifically, from the first end 31 to the second end 32, the distance between the annular outer wall of the annular limiting protrusion and the circumferential outer wall of the snap-fit ​​protrusion 105 gradually increases. This design ensures that during the snap-fit ​​process between the snap-fit ​​protrusion 30 and the snap-fit ​​recess, the snap-fit ​​recess can smoothly pass through the first end 31 of the annular limiting protrusion. However, when it reaches the second end 32, due to the increase in distance, a mechanical limit is formed, preventing the annular limiting protrusion from moving further and ensuring the correct snap-fit ​​position. At the same time, during the disassembly process, by squeezing the second end 32, the snap-fit ​​resistance is overcome, and rapid separation is achieved.

[0050] In the embodiments of this application, along the extension direction of the snap-fit ​​groove, the snap-fit ​​recess has a first groove wall and a second groove wall disposed opposite to each other. The first groove wall is disposed away from the first main body 111 or the second main body 102 relative to the second groove wall. The second end 32 of the snap-fit ​​protrusion 30 abuts against the second groove wall so that the snap-fit ​​recess snaps with the snap-fit ​​protrusion 30.

[0051] Specifically, by abutting the second end 32 of the snap-fit ​​protrusion 30 against the second groove wall, the snap-fit ​​recess engages with the snap-fit ​​protrusion 30, ensuring that the snap-fit ​​protrusion 30 can be accurately aligned and finally abutted in the appropriate position during insertion. This avoids the snap-fit ​​instability caused by positional deviation and ensures that the snap-fit ​​depth between the diode device 3 and the conductive device 1 is precisely controllable. This not only ensures the reliability of the electrical connection but also avoids the risk of damage to the internal structure of the photovoltaic junction box or electrical short circuit that may be caused by over-insertion.

[0052] In the embodiments of this application, the snap-fit ​​protrusion 105 includes a first protruding rod segment 103 and a second protruding rod segment 104 arranged sequentially along the extension direction of the snap-fit ​​protrusion 105. The axial cross-sectional area of ​​the first protruding rod segment 103 is smaller than the axial cross-sectional area of ​​the second protruding rod segment 104. The second protruding rod segment 104 is connected to the first main body 111 or the second main body 102. A snap-fit ​​protrusion 30 is provided on the first protruding rod segment 103. A sealing ring 50 is provided between the snap-fit ​​protrusion 30 and the second protruding rod segment 104. The circumferential outer wall of the sealing ring 50 abuts against the inner wall of the snap-fit ​​groove.

[0053] Specifically, the smaller axial cross-sectional area of ​​the first protruding rod segment 103 allows it to pass smoothly into the snap-fit ​​groove until the snap-fit ​​protrusion 30 engages with the snap-fit ​​recess. This not only provides guidance during the snap-fit ​​process but also ensures accurate connection between the diode device 3 and the conductive device 1. Simultaneously, the sealing ring 50 is placed between the snap-fit ​​protrusion 30 and the second protruding rod segment 104, with its circumferential outer wall tightly fitting against the inner wall of the snap-fit ​​groove, forming an effective waterproof barrier. This design ensures that even under harsh weather conditions, the electrical components inside the photovoltaic junction box are adequately protected, preventing short circuits or corrosion caused by moisture intrusion.

[0054] Specifically, the sealing ring 50 can achieve an IP68 waterproof seal.

[0055] In the embodiments of this application, there are two first conductive rod segments 41 and two second conductive rod segments 42, and the two first conductive rod segments 41 and the two second conductive rod segments 42 are arranged in a one-to-one correspondence; there are two first latching parts and two latching parts, and the two first conductive rod segments 41 and the first latching parts are arranged in a one-to-one correspondence, and the two second conductive rod segments 42 and the two second latching parts are arranged in a one-to-one correspondence.

[0056] Specifically, each first snap-fit ​​part and its corresponding second snap-fit ​​part engage in a snap-fit ​​design. This double snap-fit ​​design enhances the reliability of the connection between the conductive device 1 and the diode device 3, prevents the connection between the conductive device 1 and the diode device 3 from becoming loose, and further strengthens the stability of the electrical connection between the conductive component 10 and the diode assembly 4.

[0057] In the embodiments of this application, the first conductive rod segment 41 and the first snap-fit ​​portion are integrally injection molded, or the first conductive rod segment 41 and the first snap-fit ​​portion are plug-in connected; the second conductive rod segment 42 and the second main body portion 102 are integrally injection molded, and the second conductive rod segment 42 and the diode assembly 4 are soldered.

[0058] Specifically, the first conductive rod segment 41 and the first snap-fit ​​part are injection molded as one piece, which not only ensures the connection strength and electrical contact reliability between the two, but also significantly improves production efficiency and reduces manufacturing costs by reducing assembly steps.

[0059] Specifically, the second conductive rod segment 42 and the second main body 102 are integrally injection molded, which not only ensures the connection strength and electrical contact reliability between the two, but also significantly improves production efficiency and reduces manufacturing costs by reducing assembly steps.

[0060] Specifically, the welding connection between the second conductive rod segment 42 and the diode assembly 4 enables a low-impedance, high-reliability electrical connection between the two components. The welding connection provides a stable heat conduction path, which helps to quickly conduct the heat generated by the diode assembly 4 during operation to the second conductive rod segment 42. Then, through the heat diffusion effect of the second conductive rod segment 42, the heat energy is evenly distributed to the entire photovoltaic junction box, avoiding local overheating.

[0061] Specifically, the first conductive rod segment 41 and the second conductive rod segment 42 are both metal conductors, and the conductive elastic element 43 is made of a material with high conductivity and good elasticity, such as silver-plated copper.

[0062] Those skilled in the art will understand that the above-described embodiments are specific examples of implementing this application, and in practical applications, various changes in form and detail may be made without departing from the spirit and scope of this application. Any person skilled in the art can make various alterations and modifications without departing from the spirit and scope of this application; therefore, the scope of protection of this application should be determined by the scope defined in the claims.

Claims

1. A photovoltaic junction box, characterized by, include: A conductive device (1) includes interconnected conductive elements (10) and a first snap-fit ​​portion; A diode device (3) includes interconnected diode assemblies (4) and a second snap-fit ​​portion for snap-fitting with the first snap-fit ​​portion, so as to electrically connect the conductive element (10) and the diode assembly (4) when the first snap-fit ​​portion and the second snap-fit ​​portion are snap-fitted together. Wherein, one of the first snap-fit ​​part and the second snap-fit ​​part is a snap-fit ​​through groove, and the other of the first snap-fit ​​part and the second snap-fit ​​part is a snap-fit ​​protrusion (105); the diode device (3) is provided with a snap-fit ​​member (9), and the conductive device (1) is provided with an observation hole (2) penetrating the inside and outside of the housing of the conductive device (1), so that when the first snap-fit ​​part and the second snap-fit ​​part are snap-fitted together, the snap-fit ​​member (9) is located inside the observation hole (2); the diode device (3) is independently disposed outside the conductive device (1); The conductive device (1) includes a first main body (111) and a first detachment part (112) connected to the first main body (111). The conductive element (10) is disposed in the first main body (111). The diode device (3) includes a second main body (102) and a second detachment part (101) connected to the second main body (102). The diode assembly (4) is disposed on the second main body (102). At least a portion of the first detachment part (112) is used to form the first snap-fit ​​part, and at least a portion of the second detachment part (101) is used to form the second snap-fit ​​part. The second detachment part (101) is inserted into the first detachment part (112) or the first detachment part (112) is inserted into the second detachment part (101) so that the first snap-fit ​​part and the second snap-fit ​​part engage. A snap-fit ​​recess is provided on the circumferential groove wall of the snap-fit ​​groove. The snap-fit ​​recess is the snap-fit ​​point between the first snap-fit ​​part and the second snap-fit ​​part. The snap-fit ​​recess is recessed in the radial direction of the snap-fit ​​groove in a direction away from the central axis of the snap-fit ​​groove. A snap-fit ​​protrusion (30) is provided on the circumferential outer wall of the snap-fit ​​protrusion (105). The snap-fit ​​protrusion (30) is inserted into the snap-fit ​​recess and snaps with the snap-fit ​​recess. The snap-fit ​​protrusion (30) is an annular limiting protrusion. Along the extension direction of the snap-fit ​​protrusion (105), the annular limiting protrusion has a first end (31) and a second end (32) that are disposed opposite to each other. The first end (31) is disposed away from the first main body (111) or the second main body (102) relative to the second end (32). In the direction from the first end (31) to the second end (32), the distance between the annular outer wall of the annular limiting protrusion and the circumferential outer wall of the snap-fit ​​protrusion (105) gradually increases.

2. The photovoltaic junction box of claim 1, wherein, The photovoltaic junction box further includes a first conductive rod segment (41) and a second conductive rod segment (42). The first conductive rod segment (41) is electrically connected to the conductive component (10) and is at least partially located at the first snap-fit ​​portion. The second conductive rod segment (42) is electrically connected to the diode assembly (4) and is at least partially disposed at the second snap-fit ​​portion. At least a portion of the first conductive rod segment (41) is plugged into at least a portion of the second conductive rod segment (42).

3. The photovoltaic junction box according to claim 2, characterized in that, The photovoltaic junction box also includes a conductive elastic element (43), which is sleeved on the connection end of the first conductive rod segment (41) and the second conductive rod segment (42). The second conductive rod segment (42) is provided with a receiving groove for accommodating the first conductive rod segment (41). The conductive elastic element (43) can undergo elastic deformation to abut against the groove wall of the receiving groove.

4. The photovoltaic junction box according to claim 2, characterized in that, Along the extension direction of the snap-fit ​​groove, the snap-fit ​​recess has a first groove wall and a second groove wall disposed opposite to each other. The first groove wall is disposed away from the first main body (111) or the second main body (102) relative to the second groove wall. The second end (32) of the snap-fit ​​protrusion (30) abuts against the second groove wall so that the snap-fit ​​recess snaps against the snap-fit ​​protrusion (30).

5. The photovoltaic junction box according to claim 2, characterized in that, The snap-fit ​​protrusion (105) includes a first protruding rod segment (103) and a second protruding rod segment (104) arranged sequentially along the extension direction of the snap-fit ​​protrusion (105). The axial cross-sectional area of ​​the first protruding rod segment (103) is smaller than that of the second protruding rod segment (104). The second protruding rod segment (104) is connected to the first main body (111) or the second main body (102). The snap-fit ​​protrusion (30) is provided on the first protruding rod segment (103). A sealing ring (50) is provided between the snap-fit ​​protrusion (30) and the second protruding rod segment (104). The circumferential outer wall of the sealing ring (50) abuts against the inner wall of the snap-fit ​​groove.

6. The photovoltaic junction box according to claim 2, characterized in that, There are two of each of the first conductive rod segment (41) and the second conductive rod segment (42), and the two first conductive rod segments (41) and the two second conductive rod segments (42) are arranged in a one-to-one correspondence; there are two of each of the first latching part and the second latching part, and the two first conductive rod segments (41) and the first latching part are arranged in a one-to-one correspondence, and the two second conductive rod segments (42) and the two second latching parts are arranged in a one-to-one correspondence.

7. The photovoltaic junction box according to claim 2, characterized in that, The first conductive rod segment (41) and the first snap-fit ​​part are integrally molded by injection molding, or the first conductive rod segment (41) and the first snap-fit ​​part are connected by plug-in connection.

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