A photovoltaic junction box and photovoltaic module

Abstract

The application relates to the photovoltaic field and provides a photovoltaic junction box and a photovoltaic module. The photovoltaic junction box comprises a first junction box and a second junction box. One end of the first junction box is provided with a first cable. A first bypass module electrically connected with the first cable is arranged in the first junction box. The first bypass module is provided with a first chip and a first connecting part for electrically connecting with a busbar. One end of the second junction box is provided with a second cable. A second bypass module electrically connected with the second cable is arranged in the second junction box. The second bypass module is provided with a second chip and a second connecting part for electrically connecting with the busbar. The first chip is arranged at intervals along the direction from the end of the first junction box close to the first cable to the end of the first junction box far away from the first cable. Three first connecting parts are arranged between the two first chips. At least, the problem that the existing three-part junction box cannot better adapt to the four-piece photovoltaic module version can be solved.

Description

Technical Field

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

[0002] Photovoltaic modules are the core components of solar power generation systems, converting solar energy into electrical energy through the photovoltaic effect. They are widely used in distributed generation and centralized photovoltaic power plants. As a key electrical connection component of photovoltaic modules, the photovoltaic junction box primarily performs functions such as current collection from the battery strings, bypass protection, and output cable connection. Currently, conventional photovoltaic junction boxes mostly adopt a three-part structure, consisting of a positive terminal box, a negative terminal box, and a middle terminal box. This three-part junction box has significant limitations when adapting to four-section photovoltaic module designs, making it difficult to match the string parallel layout and bypass protection requirements of four-section photovoltaic modules. This results in poor installation adaptability, affecting the overall electrical performance and assembly efficiency of the module. Summary of the Invention

[0003] This application provides a photovoltaic junction box and a photovoltaic module, which at least helps to solve the problem that the existing three-part junction box cannot be well adapted to the four-part photovoltaic module layout.

[0004] This application provides a photovoltaic junction box, including: A first junction box, one end of which is provided with a first cable, and a first bypass module electrically connected to the first cable is provided inside the first junction box. The first bypass module is provided with a first chip and a first connection part for electrically connecting to the busbar. The second junction box has a second cable at one end and a second bypass module electrically connected to the second cable inside. The second bypass module has a second chip and a second connection part for electrically connecting to the busbar. Two of the first chips are arranged at intervals along a direction from the end of the first junction box near the first cable to the end away from the first cable, and three first connection portions are arranged between the two first chips.

[0005] Optionally, the two first chips are a first bypass chip and a second bypass chip, with the second bypass chip located on the side of the first bypass chip away from the first cable. The three first connection parts are a first busbar connection part, a second busbar connection part, and a third busbar connection part. The first busbar connection part is located between the second busbar connection part and the first bypass chip, and the third busbar connection part is located between the second busbar connection part and the second bypass chip.

[0006] Optionally, the arrangement direction of the first busbar connection and the arrangement direction of the third busbar connection are both perpendicular to the arrangement direction of the second busbar connection.

[0007] Optionally, the second busbar connection is arranged along the spacing direction of the two first chips.

[0008] Optionally, the first bypass module is provided with a clearance hole for the busbar to pass through, the clearance hole including a first clearance hole, a second clearance hole and a third clearance hole; The first clearance hole is located between the first busbar connection portion and the second busbar connection portion; The third clearance hole is located between the second busbar connection portion and the third busbar connection portion; The second clearance hole is located between the first clearance hole and the third clearance hole, and the second clearance hole is located on one side of the second busbar connection portion in the arrangement direction of the first busbar connection portion.

[0009] Optionally, the first bypass module includes a first molding compound that encapsulates the first bypass chip, and a portion of the first molding compound is opposite to the first busbar connection portion in the arrangement direction of the first busbar connection portion.

[0010] Optionally, the first bypass module includes a second molding compound that encapsulates the second bypass chip, and a portion of the second molding compound is opposite to the third busbar connection portion in the arrangement direction of the third busbar connection portion.

[0011] Optionally, the first molding body and the second molding body extend to the side of the first clearance hole and the third clearance hole away from the second clearance hole in the arrangement direction of the first busbar connection portion.

[0012] Optionally, the first bypass module is provided with a first positioning hole, and the inner surface of the first junction box is provided with a first positioning post that positions and cooperates with the first positioning hole. The first positioning hole includes a first auxiliary positioning hole located between the first molding body and the second molding body.

[0013] Optionally, the first auxiliary positioning hole is provided on the hole wall of both the first clearance hole and the third clearance hole near the second busbar connection portion.

[0014] Optionally, the first bypass module has the first auxiliary positioning hole on the surface of the first busbar connection portion away from the second clearance hole in the arrangement direction.

[0015] Optionally, the first junction box has a bottom wall located on the side of the first bypass module away from the first connection portion. The bottom wall of the first junction box is provided with a through hole for the busbar to pass through. The through hole includes a first through hole, a second through hole, and a third through hole. The first through hole, the second through hole, and the third through hole are respectively opposite to the first clearance hole, the second clearance hole, and the third clearance hole in the direction in which the clearance hole penetrates the first bypass module, wherein: The second perforation is located near the same end of the first perforation and the third perforation in the arrangement direction of the first busbar connection portion; or, the second perforation is located near the middle of the first perforation and the third perforation.

[0016] Optionally, the inner surface of the bottom wall of the first junction box is provided with a first protrusion, a portion of which extends into the first clearance hole and is provided with the first through hole.

[0017] Optionally, the inner surface of the bottom wall of the first junction box is provided with a second protrusion, a portion of which extends into the third clearance hole and is provided with the third through hole.

[0018] Optionally, the outer surface of the bottom wall of the first junction box is provided with a first groove, a second groove, and a third groove, and the first through hole, the second through hole, and the third through hole are respectively provided on the bottom wall of the first groove, the second groove, and the third groove. The first junction box satisfies at least one of the following conditions: In the arrangement direction of the second busbar connection, the size of the end of the first groove away from the first through hole is larger than the size of the end of the first groove close to the first through hole; In the arrangement direction of the first busbar connection portion, the size of the end of the second groove away from the second through hole is larger than the size of the end of the second groove close to the second through hole; In the arrangement direction of the second busbar connection, the dimension of the end of the third groove away from the third through hole is larger than the dimension of the end of the third groove close to the third through hole.

[0019] Optionally, the groove of the second groove has a first groove edge, which is close to the middle of the first busbar connection in the arrangement direction of the first busbar connection; the center of the first through hole and the center of the third through hole are both located on the side of the first groove edge close to the second through hole.

[0020] Optionally, the first bypass module includes two molding compounds, each of which encapsulates one of the first chips. Each molding compound includes a connected covering portion and an extension portion. The covering portion encapsulates the first chip, and the extension portion is located on the side of the covering portion closer to the first connecting portion in the spacing direction between the two first chips. A portion of the extension portion is opposite to the first connecting portion in a direction perpendicular to the spacing direction between the two first chips.

[0021] Optionally, the first junction box has a bottom wall located on the side of the first bypass module away from the first connection portion, and the outer surface of the bottom wall of the first junction box is provided with support feet, and a plurality of support feet are provided at intervals along the circumference of the first junction box.

[0022] This application also provides a photovoltaic module, including the aforementioned photovoltaic junction box.

[0023] The technical solution provided in this application has at least the following advantages: The photovoltaic junction box provided in this application is a two-part junction box. The first and second junction boxes of the photovoltaic junction box each contain two first chips and one second chip, respectively. This allows for precise matching of the bypass protection requirements after the four-section photovoltaic modules are connected in series and parallel, achieving a reasonable match of electrical performance. Compared to traditional three-part junction boxes, the two-part photovoltaic junction box eliminates the intermediate junction box, effectively reducing the number of components and electrical connection nodes, lowering material costs and assembly time, while also reducing potential failure points and improving system reliability. Furthermore, the two-part structure better fits the four-section photovoltaic module form factor, occupying less space and allowing for a more organized wiring layout. This significantly improves the overall integration of the module and the stability of electrical connections, resulting in stronger product adaptability and versatility, which is beneficial for improving the power generation reliability and lifespan of the four-section photovoltaic modules. Simultaneously, the first junction box centrally houses three first connection parts for connecting busbars between the two first chips, optimizing the layout of the first bypass module within the first junction box and centralizing the busbar connections. This significantly improves the utilization rate of the internal space of the first junction box, simplifies the busbar wiring path, and effectively improves the assembly efficiency of the photovoltaic modules. Attached Figure Description

[0024] One or more embodiments are illustrated by way of example with corresponding pictures in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Unless otherwise stated, the pictures 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 technology, 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.

[0025] Figure 1 An exploded view of a photovoltaic junction box provided in an embodiment of this application; Figure 2 for Figure 1 Top view of the first and second junction boxes; Figure 3 for Figure 2 Bottom view of the first and second junction boxes; Figure 4 for Figure 3 A schematic diagram of the structure at the second groove in the middle; Figure 5 for Figure 2 A schematic diagram of the structure of the first junction box; Figure 6 for Figure 5 A schematic diagram of the structure of the first bypass module; Figure 7 for Figure 6 Schematic diagram of the structure of the first matrix; Figure 8 for Figure 2 Schematic diagram of the structure of the second junction box; Figure 9 for Figure 8 A schematic diagram of the structure of the second bypass module; Figure 10 for Figure 9 Schematic diagram of the structure of the second matrix; Figure 11 An exploded view of a photovoltaic junction box provided in yet another embodiment of this application; Figure 12 for Figure 11 Top view of the first and second junction boxes.

[0026] Explanation of reference numerals in the attached figures: Photovoltaic junction box 1000, first junction box 100, first cable 110, first positioning post 120, through hole 130, first through hole 130a, second through hole 130b, third through hole 130c, first boss 140a, second boss 140b, first groove 150a, first guide slope 151a, second groove 150b, second guide slope 151b, third guide slope 152b, first slot edge 153b, and the first... Three grooves 150c, fourth guide slope 151c, support foot 160, first bypass module 200, first chip 210, first bypass chip 210a, second bypass chip 210b, first connecting part 220, first busbar connecting part 220a, second busbar connecting part 220b, third busbar connecting part 220c, clearance hole 230, first clearance hole 230a, second clearance hole 230b, third clearance hole 230c. 0c, Encapsulation body 240, First encapsulation body 240a, Second encapsulation body 240b, Covering portion 241, Extension portion 242, First positioning hole 250, First auxiliary positioning hole 250a, First substrate 260, First conductive element 261, Second conductive element 262, Third conductive element 263, First connector 264, Second connector 265, Second junction box 300, Second cable 310, Second positioning post 320, Fourth through hole 3 30. Fourth groove 340, second bypass module 400, second chip 410, second connecting part 420, fourth clearance hole 430, third encapsulation body 440, second positioning hole 450, second auxiliary positioning hole 450a, second substrate 460, fourth conductive element 461, fifth conductive element 462, third connecting element 463, first cover 500a, second cover 500b, first pressing block 600a, second pressing block 600b. Detailed Implementation

[0027] As the background technology shows, the existing three-part junction box structure cannot meet the installation and connection requirements of four-section photovoltaic modules, resulting in structural redundancy and inconvenient installation. Therefore, there is an urgent need to develop a new junction box structure suitable for four-section photovoltaic module designs to simplify the installation process and improve module reliability.

[0028] The photovoltaic junction box provided in this application is a two-part junction box. The first and second junction boxes of the photovoltaic junction box each contain two first chips and one second chip, respectively. This allows for precise matching of the bypass protection requirements after the four-section photovoltaic modules are connected in series and parallel, achieving a reasonable match of electrical performance. Compared to traditional three-part junction boxes, the two-part photovoltaic junction box eliminates the intermediate junction box, effectively reducing the number of components and electrical connection nodes, lowering material costs and assembly time, while also reducing potential failure points and improving system reliability. Furthermore, the two-part structure better fits the four-section photovoltaic module form factor, occupying less space and allowing for a more organized wiring layout. This significantly improves the overall integration of the module and the stability of electrical connections, resulting in stronger product adaptability and versatility, which is beneficial for improving the power generation reliability and lifespan of the four-section photovoltaic modules. Simultaneously, the first junction box centrally houses three first connection parts for connecting busbars between the two first chips, optimizing the layout of the first bypass module within the first junction box and centralizing the busbar connections. This significantly improves the utilization rate of the internal space of the first junction box, simplifies the busbar wiring path, and effectively improves the assembly efficiency of the photovoltaic modules.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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).

[0033] 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.

[0034] 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.

[0035] In the description of the embodiments of this application, "electrically connected to one component" means that both components are made of conductive materials, and the two components are in direct contact and connected or connected via other conductive materials. Therefore, when the photovoltaic module is generating electricity, there is current transfer between the two components. "Electrically contacting one component to another" means that the two components are not only in contact, but also, because both components are made of conductive materials, there is current transfer between the two components when the photovoltaic module is generating electricity.

[0036] In the accompanying drawings corresponding to the embodiments of this disclosure, the thickness and / or area of ​​layers, films, panels, regions, etc., are enlarged for better understanding and ease of description. Throughout the specification, the same reference numerals denote the same elements. It should be understood that 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 an intermediate component between the two components. Conversely, when describing a component on the surface of another component, or a component "directly" on another component, or a component surface on which another component is formed or disposed, it indicates that there is no intermediate component between the two components. Furthermore, when describing a component as "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.

[0037] 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 another component may be present therein. 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 therein.

[0038] 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.

[0039] This application provides a photovoltaic junction box. Figures 1 to 12 Some embodiments of the photovoltaic junction box provided in this application are shown.

[0040] Please see Figure 1 , Figure 2 , Figure 11 and Figure 12 In some embodiments, the photovoltaic junction box 1000 includes a first junction box 100 and a second junction box 300. One end of the first junction box 100 is provided with a first cable 110. The first junction box 100 is provided with a first bypass module 200 electrically connected to the first cable 110. The first bypass module 200 is provided with a first chip 210 and a first connection part 220 for electrically connecting to a busbar (not shown in the figure). One end of the second junction box 300 is provided with a second cable 310. The second junction box 300 is provided with a second bypass module 400 electrically connected to the second cable 310. The second bypass module 400 is provided with a second chip 410 and a second connection part 420 for electrically connecting to a busbar. Among them, two first chips 210 are provided at intervals along the direction from the end of the first junction box 100 near the first cable 110 to the end away from the first cable 110. Three first connection parts 220 are provided between the two first chips 210.

[0041] Specifically, the photovoltaic junction box 1000 can be used in photovoltaic modules such as four-cell photovoltaic modules. The photovoltaic junction box 1000 is electrically connected to the photovoltaic module through a busbar. The following description will take the application of the photovoltaic junction box 1000 in a four-cell photovoltaic module as an example. The photovoltaic junction box 1000 is a new type of two-part junction box, that is, the photovoltaic junction box 1000 includes a first junction box 100 and a second junction box 300. The first junction box 100 and the second junction box 300 usually adopt a rectangular box structure. The following description will take an example where both the first junction box 100 and the second junction box 300 adopt a rectangular box structure.

[0042] A first cable 110 is provided at one end of the first junction box 100, and the first cable 110 is typically located at one end of the first junction box 100 along its length. A first bypass module 200 is provided inside the first junction box 100, and one end of the first cable 110 is located inside the first junction box 100 and electrically connected to the first bypass module 200. The first bypass module 200 includes two first chips 210 and three first connection parts 220. The first chips 210 are typically diode chips, etc. The first connection parts 220 can be electrically connected to the busbar by means of soldering, laser soldering, or ultrasonic soldering, so that the first junction box 100 can bypass four strings of battery cells. The following description will take the example of the first cable 110 being located at one end of the first junction box 100 along its length and the first chip 210 being a diode chip.

[0043] A second cable 310 is provided at one end of the second junction box 300. The second cable 310 is typically located at one end of the second junction box 300 along its length. A second bypass module 400 is provided inside the second junction box 300. One end of the second cable 310 is located inside the second junction box 300 and electrically connected to the second bypass module 400. The second bypass module 400 includes a second chip 410 and a second connection part 420. The second chip 410 is typically a diode chip, etc. The second connection part 420 can be electrically connected to the busbar by means of soldering, laser soldering, or ultrasonic soldering. The specific number of second chips 410 can be set according to the actual situation. For example, there can be one, two, three, four, or more second chips 410. Optionally, please refer to [link to relevant documentation]. Figure 1 , Figure 2 , Figure 11 and Figure 12 In some embodiments, there is one second chip 410 and two second connectors 420, so that the second junction box 300 can bypass two strings of battery cells. The following description will use an example where the second cable 310 is located at one end of the length of the second junction box 300, the second chip 410 is a diode chip, there is one second chip 410, and there are two second connectors 420.

[0044] The photovoltaic junction box 1000 is composed of a first junction box 100 and a second junction box 300, one of which is the positive terminal box and the other is the negative terminal box. When the first junction box 100 is used as the negative terminal box, the second junction box 300 is used as the positive terminal box. For example, please refer to [reference needed]. Figure 1 and Figure 2 In some embodiments, the first junction box 100 is the negative junction box, and the second junction box 300 is the positive junction box. When the first junction box 100 is the positive junction box, the second junction box 300 is the negative junction box. For example, please refer to [reference needed]. Figure 11 and Figure 12 In some embodiments, the first junction box 100 is the positive junction box, and the second junction box 300 is the negative junction box. The photovoltaic junction box 1000 meets the bypass protection requirements after the four-section photovoltaic modules are connected in series and parallel by differentiating the diode chips of the positive and negative junction boxes, and achieves electrical performance matching.

[0045] The 1000 photovoltaic junction box features a two-part structure, simplifying the layout of the back of the modules, reducing cable connection complexity, facilitating on-site installation and subsequent maintenance and testing, and lowering construction difficulty. The 1000 junction box is adaptable to various module types with different requirements for the number of positive and negative diodes. While achieving low-cost control, the 1000 junction box can meet the requirements of high-intensity operating environments. The 1000 junction box has a robust overall structure and stable electrical performance. Its modular diode design effectively reduces product size and improves integration.

[0046] The first bypass module 200 within the first junction box 100 is provided with two first chips 210 and three first connecting parts 220. The two first chips 210 are spaced apart from each other along the length of the first junction box 100, that is, the two first chips 210 are respectively located at both ends of the first bypass module 200 along the length of the first junction box 100. The three first connecting parts 220 are all located between the two first chips 210. This achieves optimized layout of the first bypass module 200 within the first junction box 100 and centralized arrangement of busbar connections, significantly improving the utilization rate of the internal space of the first junction box 100, simplifying the busbar wiring path, and effectively improving the assembly efficiency of photovoltaic modules. The arrangement direction of the first chips 210 (i.e., from the positive terminal to the negative terminal of the first chip 210) can be set according to actual conditions. For example, the arrangement direction of the first chips 210 can be parallel or approximately parallel to the length direction of the first junction box 100; the arrangement direction of the first chips 210 can also be parallel or approximately parallel to the width direction of the first junction box 100. Similarly, the arrangement direction of the second chip 410 (i.e., the direction from the positive terminal to the negative terminal of the second chip 410) can be set according to the actual situation. For example, the arrangement direction of the second chip 410 can be parallel or approximately parallel to the length direction of the second junction box 300; the arrangement direction of the second chip 410 can be parallel or approximately parallel to the width direction of the second junction box 300. The following will be an example with the arrangement direction of the first chip 210 being the length direction of the first junction box 100 and the arrangement direction of the second chip 410 being the length direction of the second junction box 300.

[0047] The photovoltaic junction box 1000 is a two-part junction box. The first junction box 100 and the second junction box 300 of the photovoltaic junction box 1000 respectively house two first chips 210 and one second chip 410, which can precisely match the bypass protection requirements of the four-section photovoltaic modules connected in series and parallel, achieving a reasonable match of electrical performance. Compared with the traditional three-part junction box, the two-part photovoltaic junction box 1000 eliminates the intermediate junction box, effectively reducing the number of components and electrical connection nodes, lowering material costs and assembly time, while also reducing potential failure points and improving system reliability. Furthermore, the two-part structure better fits the four-section photovoltaic module form factor, occupies less space, and allows for a more organized wiring layout, significantly improving the overall integration of the module and the stability of electrical connections. This enhances product adaptability and versatility, contributing to improved power generation reliability and lifespan of the four-section photovoltaic modules. Meanwhile, the first junction box 100 has three first connection parts 220 for connecting the busbars centrally arranged between the two first chips 210, which realizes the layout optimization of the first bypass module 200 in the first junction box 100 and the centralized arrangement of the busbar connection, significantly improving the utilization rate of the internal space of the first junction box 100, simplifying the busbar wiring path, and effectively improving the assembly efficiency of photovoltaic modules.

[0048] The photovoltaic junction box 1000 is composed of a first junction box 100 and a second junction box 300. The specific configuration of the first junction box 100 and the second junction box 300 will be described in detail below.

[0049] A first cable 110 is provided at one end of the first junction box 100. The specific method of fixing the first cable 110 to the first junction box 100 can be set according to the actual situation. For example, the first cable 110 can be fixed to the first junction box 100 by means of screws or clips. Optionally, please refer to Figure 1 and Figure 3 In some embodiments, a first mounting groove is provided on the bottom wall of the first junction box 100, and one end of the first cable 110 extends into the first junction box 100 from the first mounting groove. A first pressure block 600a is provided in the first mounting groove, and the first pressure block 600a abuts against the side of the bottom wall of the groove away from the first mounting groove of the first cable 110.

[0050] Specifically, when the first junction box 100 is installed on the photovoltaic module, the bottom wall of the first junction box 100 is flush with the back of the photovoltaic module. A first mounting groove adapted to the shape of the first pressure block 600a is provided on the bottom wall of the first junction box 100, allowing the first pressure block 600a to be embedded within the first mounting groove. The first pressure block 600a forms a lateral abutment and compression on the first cable 110 within the first mounting groove, effectively limiting and fixing the first cable 110, preventing it from shifting, loosening, or coming off during use, and ensuring the stability of the first cable 110 connection. Furthermore, this compression structure reduces the gap between the first cable 110 and the first junction box 100, enhancing the dustproof and waterproof protection of the first junction box 100. The overall structure is simple and easy to assemble, simplifying the installation process and improving assembly efficiency. The first pressure block 600a can be fixed to the first junction box 100 by screws, adhesive, or clips. For example, please refer to... Figure 1 and Figure 3 In some embodiments, the first pressure block 600a, the first junction box 100, and the first cable 110 are fixed by ultrasonic welding, which is a relatively simple way to fix the first pressure block 600a.

[0051] The first bypass module 200 is disposed within the first junction box 100, which is typically equipped with a cover. Optionally, please refer to... Figure 1 In some embodiments, a first opening is provided on the top wall of the first junction box 100, and a first cover 500a is detachably provided on the first junction box 100 for opening and closing the first opening.

[0052] Specifically, the top and bottom walls of the first junction box 100 are spaced apart and opposite each other along the height of the junction box 100. After the first bypass module 200 is installed into the first junction box 100 through the first opening, the first junction box 100 can be sealed closed by the first cover 500a. Thus, the first opening in the first junction box 100, combined with the detachable first cover 500a, facilitates the installation of the first bypass module 200 into the first junction box 100. Furthermore, the first cover 500a effectively protects the electrical connection parts inside the first junction box 100, preventing dust, moisture, and foreign objects from entering the junction box 100, ensuring the safety and reliability of the electrical connections. The detachable structure also facilitates subsequent troubleshooting and component replacement, improving overall ease of use. The first cover 500a can be fixed to the first junction box 100 by screws, adhesive, or clips.

[0053] The first bypass module 200 is provided with a first chip 210 and a first connection portion 220, and the first bypass module 200 is electrically connected to a first cable 110. The first bypass module 200 typically includes a conductor electrically connected to the first chip 210, the first connection portion 220, and the first cable 110. Optionally, please refer to... Figures 5 to 7 In some embodiments, the first bypass module 200 includes a first base 260, on which a first chip 210 and a first connection portion 220 are disposed, and one end of the first base 260 is electrically connected to a first cable 110 in the length direction of the first junction box 100.

[0054] Specifically, the first bypass module 200 is integrated onto the first base 260, combining the first chip 210 and the first connector 220 into a single unit. This compact structure and high integration reduce the overall space required. Simultaneously, one end of the first base 260 is directly electrically connected to the first cable 110, shortening the electrical connection path, reducing line loss and signal interference, and improving conductivity and signal transmission stability. This integrated arrangement simplifies the wiring structure within the first junction box 100, making assembly more convenient and facilitating modular assembly and replacement, resulting in higher maintenance efficiency. It also makes the internal layout of the first junction box 100 more organized, reducing the risk of interference between components. The following description will use the first bypass module 200, including the first base 260, as an example.

[0055] The specific fixing method between the first substrate 260 and the first cable 110 can be set according to the actual situation. For example, the first substrate 260 and the first cable 110 can be fixed by resistance welding, riveting, or ultrasonic welding. Optionally, please refer to Figures 5 to 7In some embodiments, the surface of the first substrate 260 near the first cable 110 is provided with a first rib extending along the width direction of the first junction box 100, and the first rib abuts against the first cable 110.

[0056] Specifically, the first substrate 260 contacts the first cable 110 through the first rib, which can increase the contact area between the first substrate 260 and the first cable 110 and ensure reliable contact, thereby facilitating a stable and low-resistance electrical connection between the first substrate 260 and the first cable 110.

[0057] Three first connecting parts 220 are disposed between two first chips 210. The specific arrangement of the three first connecting parts 220 can be set according to the actual situation. For example, the three first connecting parts 220 can be along the length direction of the first wire box 100; the three first connecting parts 220 can also be along the width direction of the first wire box 100. Optionally, please refer to Figure 1 , Figure 2 , Figure 11 and Figure 12 In some embodiments, the two first chips 210 are respectively a first bypass chip 210a and a second bypass chip 210b, with the second bypass chip 210b located on the side of the first bypass chip 210a away from the first cable 110; the three first connection portions 220 are respectively a first busbar connection portion 220a, a second busbar connection portion 220b, and a third busbar connection portion 220c, with the first busbar connection portion 220a located between the second busbar connection portion 220b and the first bypass chip 210a, and the third busbar connection portion 220c located between the second busbar connection portion 220b and the second bypass chip 210b.

[0058] Specifically, the first bypass chip 210a is disposed at the end of the first bypass module 200 near the first cable 110, and the second bypass chip 210b is disposed at the end of the first bypass module 200 away from the first cable 110. From the first bypass chip 210a to the second bypass chip 210b, a first busbar connection portion 220a, a second busbar connection portion 220b, and a third busbar connection portion 220c are sequentially arranged along the length of the first junction box 100 between the first bypass chip 210a and the second bypass chip 210b. By arranging the two first chips 210 and the three first connection portions 220 along the length of the first junction box 100 in this way, the electrical path of the first bypass module 200 is shorter and more symmetrical, effectively reducing line impedance and heat generation, and improving the uniformity of current transmission. Meanwhile, this layout of two first chips 210 and three first connectors 220 can make full use of the length space of the first junction box 100, making the overall structure more compact, reducing the internal volume occupied by the first junction box 100, and facilitating the orderly docking of the busbars, simplifying assembly and subsequent maintenance.

[0059] The first connecting part 220 is typically the welding position of the first junction box 100 for welding the busbar. The first connecting part 220 and the busbar can be welded and fixed by means of soldering, laser welding, or ultrasonic welding. The first connecting part 220 can be a solder block, and the welding position of the first connecting part 220 can be provided with a fixing structure such as a solder reservoir to fix the solder block at the welding position of the first connecting part 220. The following description will use a square solder block as an example.

[0060] The arrangement direction of the first busbar connecting part 220a, the second busbar connecting part 220b, and the third busbar connecting part 220c (i.e., the length direction of the first connecting part 220) can be set according to the actual situation. For example, the arrangement direction of any one of the first busbar connecting parts 220a, the second busbar connecting part 220b, and the third busbar connecting part 220c can be the length direction of the first junction box 100; the arrangement direction of any one of the first busbar connecting parts 220a, the second busbar connecting part 220b, and the third busbar connecting part 220c can also be the width direction of the first junction box 100; the arrangement directions of any two of the first busbar connecting parts 220a, the second busbar connecting part 220b, and the third busbar connecting part 220c can be parallel or approximately parallel; the arrangement directions of any two of the first busbar connecting parts 220a, the second busbar connecting part 220b, and the third busbar connecting part 220c can also be perpendicular or approximately perpendicular.

[0061] Optionally, please refer to Figure 5 and Figure 6 In some embodiments, the arrangement direction of the first busbar connection portion 220a and the arrangement direction of the third busbar connection portion 220c are both perpendicular to the arrangement direction of the second busbar connection portion 220b.

[0062] Specifically, the arrangement direction of the first busbar connection 220a is parallel or approximately parallel to the arrangement direction of the third busbar connection 220c, and the arrangement direction of the first busbar connection 220a is perpendicular or approximately perpendicular to the arrangement direction of the second busbar connection 220b. This vertical arrangement of the three first connection parts 220 fully utilizes the planar space of the first base 260, making the overall structure more compact and reducing the volume of the first bypass module 200. Furthermore, this arrangement of the three first connection parts 220 ensures a clear and reasonable current path, reduces current congestion and localized heating, improves current transmission stability, and facilitates the orderly access of external busbars from different directions, simplifying assembly and wiring and improving installation and maintenance convenience. For example, please refer to... Figure 5 and Figure 6In some embodiments, the arrangement direction of the first busbar connection portion 220a and the arrangement direction of the third busbar connection portion 220c are both the width direction of the first junction box 100, and the arrangement direction of the second busbar connection portion 220b is the length direction of the first junction box 100.

[0063] Optionally, please refer to Figure 5 and Figure 6 In some embodiments, the second busbar connection portion 220b is arranged along the spacing direction of the two first chips 210.

[0064] Specifically, the second busbar connection 220b is arranged along the length of the first junction box 100. The second busbar connection 220b is located between the first busbar connection 220a and the third busbar connection 220c. The second busbar connection 220b is arranged along the interval between the first busbar connection 220a and the third busbar connection 220c, which can make full use of the idle space between the first busbar connection 220a and the third busbar connection 220c, making the overall layout of the first bypass module 200 more compact and effectively reducing the external dimensions of the first base 260.

[0065] Optionally, please refer to Figures 5 to 7 In some embodiments, the first bypass module 200 is provided with a clearance hole 230 for the busbar to pass through, the clearance hole 230 including a first clearance hole 230a, a second clearance hole 230b and a third clearance hole 230c.

[0066] Specifically, the first bypass module 200 is electrically connected to the three busbars through three first connecting parts 220 respectively. The first base 260 of the first bypass module 200 is provided with at least three clearance holes 230 (i.e., first clearance hole 230a, second clearance hole 230b and third clearance hole 230c) corresponding to the busbars. This provides independent passage space for the three busbars, realizes the orderly installation and positioning of the busbars, avoids the busbars from tangling, squeezing or interfering with each other, reduces the risk of short circuit, and the clearance holes 230 can also form a certain limit constraint on the busbars to prevent the busbars from shaking and shifting, and ensure the reliability of the connection.

[0067] The specific locations of the three clearance holes 230 on the first bypass module 200 can be set according to actual conditions. For example, the three clearance holes 230 are usually located close to the three first connecting portions 220, respectively. Optionally, please refer to... Figures 5 to 7In some embodiments, the first clearance hole 230a is located between the first busbar connection portion 220a and the second busbar connection portion 220b; the third clearance hole 230c is located between the second busbar connection portion 220b and the third busbar connection portion 220c; the second clearance hole 230b is located between the first clearance hole 230a and the third clearance hole 230c, and the second clearance hole 230b is located on one side of the second busbar connection portion 220b in the arrangement direction of the first busbar connection portion 220a.

[0068] Specifically, the first clearance hole 230a, the second clearance hole 230b, and the third clearance hole 230c are respectively provided close to the first busbar connection portion 220a, the second busbar connection portion 220b, and the third busbar connection portion 220c. The first clearance hole 230a, the second clearance hole 230b, and the third clearance hole 230c are located between the first busbar connection portion 220a and the third busbar connection portion 220c. The second clearance hole 230b is located on one side of the second busbar connection portion 220b in the width direction of the first junction box 100. By arranging three first connecting parts 220 and three clearance holes 230 on the first bypass module 200, the gap space between the three first connecting parts 220 can be fully utilized, making the overall structure more compact and reducing the volume of the first bypass module 200. At the same time, the clearance holes 230 and the first connecting parts 220 are set in separate areas, which can effectively avoid mutual interference and cross short circuits between the busbars, and improve insulation safety and wiring neatness.

[0069] The shape of the clearance hole 230 is typically adapted to the shape of the busbar; for example, please refer to... Figures 5 to 7 In some embodiments, the clearance hole 230 is a square hole, and the following description will take the clearance hole 230 as a square hole as an example. The three clearance holes 230, the three first connecting parts 220 and the three busbars are usually arranged in a one-to-one correspondence. The extension direction of each clearance hole 230 (i.e. the length direction of the clearance hole 230) and the arrangement of the corresponding first connecting part 220 are usually parallel or approximately parallel. For example, the extension direction of the first clearance hole 230a and the extension direction of the third clearance hole 230c can both be the width direction of the first junction box 100, while the extension direction of the second clearance hole 230b can be the length direction of the first junction box 100.

[0070] Optionally, please refer to Figures 5 to 7In some embodiments, the extension direction of the first clearance hole 230a and the extension direction of the third clearance hole 230c are the width direction of the first junction box 100, and the extension direction of the second clearance hole 230b is the length direction of the first junction box 100. The two ends of the second clearance hole 230b in the length direction of the first junction box 100 are respectively connected to the first clearance hole 230a and the third clearance hole 230c. The end of the second clearance hole 230b away from the second busbar connection portion 220b in the width direction of the first junction box 100 passes through the first bypass module 200.

[0071] Specifically, the first clearance hole 230a, the second clearance hole 230b, and the third clearance hole 230c are arranged vertically, which allows different busbars to be installed along regular paths that are perpendicular to each other, avoiding cross-interference and short-circuit risks, and improving insulation safety. One end of the second clearance hole 230b passes through the first bypass module 200, which facilitates the smooth introduction of the busbar from the side, reduces assembly difficulty, and also reduces the area of ​​the first bypass module 200.

[0072] The first junction box 100 is typically provided with a through hole 130 to allow an external busbar to pass through the through hole 130 into the first junction box 100. Alternatively, please refer to... Figures 3 to 5 In some embodiments, the first junction box 100 has a bottom wall located on the side of the first bypass module 200 away from the first connection portion 220. The bottom wall of the first junction box 100 is provided with a through hole 130 for the busbar to pass through. The through hole 130 includes a first through hole 130a, a second through hole 130b and a third through hole 130c. The first through hole 130a, the second through hole 130b and the third through hole 130c are respectively opposite to the first clearance hole 230a, the second clearance hole 230b and the third clearance hole 230c in the direction in which the clearance hole 230 passes through the first bypass module 200.

[0073] Specifically, the first through hole 130a, the second through hole 130b, and the third through hole 130c are respectively directly opposite to the first clearance hole 230a, the second clearance hole 230b, and the third clearance hole 230c in the height direction of the first junction box 100, and the shapes of the first through hole 130a, the second through hole 130b, and the third through hole 130c are generally adapted to the shapes of the first clearance hole 230a, the second clearance hole 230b, and the third clearance hole 230c. For example, please refer to... Figures 3 to 5 In some embodiments, the first through hole 130a, the second through hole 130b, and the third through hole 130c are all square holes. The extension direction of the first through hole 130a and the extension direction of the third through hole 130c are both the width direction of the first junction box 100, while the extension direction of the second through hole 130b is both the length direction of the first junction box 100.

[0074] The first through hole 130a and the third through hole 130c are located on both sides of the second through hole 130b in the length direction of the first junction box 100. The three through holes 130 on the first junction box 100 and the two clearance holes 230 on the first bypass module 200 are arranged opposite to each other in the height direction of the first junction box 100. This allows the busbar to pass smoothly through the clearance holes 230 and the through holes 130 in a straight line, avoiding bending, obstruction or path deviation, effectively reducing assembly resistance and improving assembly efficiency.

[0075] The specific arrangement of the three through holes 130 on the first junction box 100 can be set according to the actual situation. For example, the three through holes 130 can be arranged in an H-shape or an I-shape; the three through holes 130 can also be arranged in a triangular shape or a gate-shaped shape. Optionally, please refer to Figures 3 to 5 In some embodiments, the second perforation 130b is provided at the same end near the first perforation 130a and the third perforation 130c in the arrangement direction of the first busbar connection portion 220a.

[0076] Specifically, the first through hole 130a, the second through hole 130b, and the third through hole 130c are arranged in a triangular or gate-shaped manner. The first through hole 130a, the second through hole 130b, and the third through hole 130c are flush or nearly flush at one end in the width direction of the first junction box 100. In this way, the first junction box 100 can be flexibly matched with the installation of busbars arranged in a triangular or gate-shaped manner, resulting in a compact structure and stable performance.

[0077] Alternatively, in other embodiments, the second perforation 130b is disposed near the middle of the first perforation 130a and the third perforation 130c.

[0078] Specifically, the first through hole 130a, the second through hole 130b, and the third through hole 130c are arranged in an H-shape or an I-shape, etc. The second through hole 130b is close to the center line connecting the first through hole 130a and the third through hole 130c. In this way, the first junction box 100 can be flexibly matched with the H-shaped or I-shaped busbars for installation, with a compact structure and stable performance.

[0079] Optionally, please refer to Figure 3 and Figure 4In some embodiments, the outer surface of the bottom wall of the first junction box 100 is provided with a first groove 150a, a second groove 150b and a third groove 150c, and a first through hole 130a, a second through hole 130b and a third through hole 130c are respectively provided on the bottom wall of the first groove 150a, the second groove 150b and the third groove 150c. The first junction box 100 satisfies at least one of the following conditions: (1) In the arrangement direction of the second busbar connection part 220b, the end of the first groove 150a away from the first through hole 130a. (1) The size of the second groove 150b is larger than the size of the end of the first groove 150a that is closer to the first through hole 130a; (2) In the arrangement direction of the first busbar connection 220a, the size of the end of the second groove 150b that is away from the second through hole 130b is larger than the size of the end of the second groove 150b that is closer to the second through hole 130b; (3) In the arrangement direction of the second busbar connection 220b, the size of the end of the third groove 150c that is away from the third through hole 130c is larger than the size of the end of the third groove 150c that is closer to the third through hole 130c.

[0080] Specifically, the outer surface of the bottom wall of the first junction box 100 is provided with a first groove 150a, a second groove 150b, and a third groove 150c corresponding to the first through hole 130a, the second through hole 130b, and the third through hole 130c, respectively. The arrangement of the first groove 150a, the second groove 150b, and the third groove 150c is the same as the arrangement of the first through hole 130a, the second through hole 130b, and the third through hole 130c. The first through hole 130a is located on the bottom wall of the first groove 150a. Since the first groove 150a is designed with a larger opening and a smaller bottom (i.e., the opening is larger and the bottom is smaller), it is convenient for the busbar to be smoothly inserted into the first through hole 130a, and the first groove 150a can play a certain role in limiting and regulating the busbar. Similarly, the second perforation 130b is disposed on the bottom wall of the second groove 150b. Since the second groove 150b is designed with a larger opening and a smaller bottom (i.e., the opening is larger and the bottom is smaller), it facilitates the smooth insertion of the busbar into the second perforation 130b, and the second groove 150b can also limit and regulate the busbar to a certain extent. The third perforation 130c is disposed on the bottom wall of the third groove 150c. Since the third groove 150c is designed with a larger opening and a smaller bottom (i.e., the opening is larger and the bottom is smaller), it facilitates the smooth insertion of the busbar into the third perforation 130c, and the third groove 150c can also limit and regulate the busbar to a certain extent.

[0081] The first groove 150a is designed with a wider opening and a narrower bottom. Optionally, please refer to [the relevant documentation]. Figure 3 and Figure 4In some embodiments, from the opening of the first groove 150a to the first through hole 130a, the size of the first groove 150a gradually decreases in the arrangement direction of the second busbar connection 220b, so as to form a first guide slope 151a in the first groove 150a near the groove sidewall of the third groove 150c and / or away from the groove sidewall of the third groove 150c.

[0082] Specifically, a first guide slope 151a is provided on the side wall of the first groove 150a. The first guide slope 151a can smoothly guide the insertion process of the busbar, so that the busbar can smoothly slide into the first through hole 130a along the first guide slope 151a. This effectively avoids the end of the busbar from rigidly colliding or getting stuck with the side wall of the first groove 150a, significantly reducing assembly difficulty and improving assembly efficiency.

[0083] The second groove 150b is designed with a wider opening and a narrower bottom. Optionally, please refer to [link / reference needed]. Figure 3 and Figure 4 In some embodiments, from the opening of the second groove 150b to the second through hole 130b, the size of the second groove 150b gradually decreases in the arrangement direction of the first busbar connection portion 220a, so as to form a second guide slope 151b on the groove sidewall of the second groove 150b near the middle of the first busbar connection portion 220a; and / or, from the opening of the second groove 150b to the second through hole 130b, the size of the second groove 150b gradually decreases in the arrangement direction of the first busbar connection portion 220a, so as to form a third guide slope 152b on the groove sidewall of the second groove 150b away from the middle of the first busbar connection portion 220a.

[0084] Specifically, the second groove 150b has a second guide slope 151b and / or a third guide slope 152b on its groove sidewall. The second guide slope 151b and the third guide slope 152b can provide a smooth guide for the insertion process of the busbar, allowing the busbar to slide smoothly into the second through hole 130b along the second guide slope 151b or the third guide slope 152b. This effectively avoids the end of the busbar from rigidly colliding or getting stuck with the groove sidewall of the second groove 150b, significantly reducing assembly difficulty and improving assembly efficiency.

[0085] The third groove 150c is designed with a wider opening and a narrower bottom. Optionally, please refer to [link / reference needed]. Figure 3 and Figure 4 In some embodiments, from the opening of the third groove 150c to the third through hole 130c, the size of the third groove 150c gradually decreases in the arrangement direction of the second busbar connection 220b, so as to form a fourth guide slope 151c on the groove sidewall of the third groove 150c near the first groove 150a and / or away from the groove sidewall of the first groove 150a.

[0086] Specifically, a fourth guide slope 151c is provided on the side wall of the third groove 150c. The fourth guide slope 151c can smoothly guide the insertion process of the busbar, allowing the busbar to slide smoothly into the third through hole 130c along the fourth guide slope 151c. This effectively avoids rigid collision and jamming between the end of the busbar and the side wall of the third groove 150c, significantly reducing assembly difficulty and improving assembly efficiency.

[0087] Optionally, please refer to Figure 3 and Figure 4 In some embodiments, the groove of the second groove 150b has a first groove edge 153b, which is close to the middle of the first busbar connection 220a in the arrangement direction of the first busbar connection 220a; the center of the first through hole 130a and the center of the third through hole 130c are both located on the side of the first groove edge 153b close to the second through hole 130b.

[0088] Specifically, the first groove edge 153b of the second groove 150b is usually the starting position of the second guide slope 151b, and the starting position of the second guide slope 151b exceeds the center line connecting the first through hole 130a and the third through hole 130c, so that the photovoltaic junction box 1000 can simultaneously meet the installation requirements of busbars arranged in "H-type or I-type" and "T-type or gate-type" configurations.

[0089] Optionally, please refer to Figure 5 In some embodiments, the inner surface of the bottom wall of the first junction box 100 is provided with a first protrusion 140a, a portion of the first protrusion 140a extends into the first clearance hole 230a and is provided with a first through hole 130a.

[0090] Specifically, a portion of the bottom wall of the first junction box 100 is recessed inward to form a first groove 150a on the outer surface of the bottom wall of the first junction box 100, and simultaneously a first boss 140a is formed on the inner surface of the bottom wall of the first junction box 100. The shape of the first boss 140a is usually adapted to the shape of the first clearance hole 230a, and one end of the first boss 140a with the first through hole 130a is located inside the first clearance hole 230a. In this way, the first boss 140a can provide support and limit the first bypass module 200.

[0091] Optionally, please refer to Figure 5 In some embodiments, the inner surface of the bottom wall of the first junction box 100 is provided with a second protrusion 140b, a portion of which extends into the third clearance hole 230c and is provided with a third through hole 130c.

[0092] Specifically, a portion of the bottom wall of the first junction box 100 is recessed inward to form a third groove 150c on the outer surface of the bottom wall of the first junction box 100, and simultaneously a second protrusion 140b is formed on the inner surface of the bottom wall of the first junction box 100. The shape of the second protrusion 140b is usually adapted to the shape of the third clearance hole 230c, and one end of the second protrusion 140b with the third through hole 130c is located inside the third clearance hole 230c. In this way, the second protrusion 140b can provide support and limit the first bypass module 200.

[0093] Optionally, please refer to Figures 5 to 7 In some embodiments, the first bypass module 200 is provided with a first positioning hole 250, and the inner surface of the first junction box 100 is provided with a first positioning post 120 that is positioned and engaged with the first positioning hole 250.

[0094] Specifically, the first bypass module 200 has one or more first positioning holes 250 extending through it. Correspondingly, the inner surface of the first junction box 100 has one or more first positioning posts 120. Each first positioning post 120 is engaged with a corresponding first positioning hole 250, thus providing support and positioning for the first bypass module 200. The first junction box 100 and the first bypass module 200 can be fixed together by hot riveting or cold pressing using the first positioning posts 120.

[0095] The first positioning hole 250 is typically provided in multiple circumferentially spaced along the first bypass module 200. Optionally, please refer to... Figures 5 to 7 In some embodiments, the first positioning hole 250 includes a first auxiliary positioning hole 250a located between the first molding compound 240a and the second molding compound 240b.

[0096] Specifically, the first bypass module 200 is provided with a first auxiliary positioning hole 250a in the middle. Through the cooperation of the first auxiliary positioning hole 250a and the first positioning post 120, the first bypass module 200 can be effectively prevented from deforming or arching during installation and use, thereby ensuring the reliable operation of the first bypass module 200 and preventing electrical connection failure caused by deformation.

[0097] The specific location of the first auxiliary positioning hole 250a can be set according to the actual situation. For example, one or more first auxiliary positioning holes 250a can be provided near the hole wall of the first clearance hole 230a close to the second busbar connection part 220b; one or more first auxiliary positioning holes 250a can also be provided near the hole wall of the third clearance hole 230c close to the second busbar connection part 220b; one or more first auxiliary positioning holes 250a can also be provided on the surface of the first bypass module 200 away from the second clearance hole 230b in the arrangement direction of the first busbar connection part 220a.

[0098] Optionally, please refer to Figures 5 to 7 In some embodiments, the first clearance hole 230a and the third clearance hole 230c are both provided with a first auxiliary positioning hole 250a near the hole wall of the second busbar connection portion 220b; the first bypass module 200 is provided with a first auxiliary positioning hole 250a on the surface away from the second clearance hole 230b in the arrangement direction of the first busbar connection portion 220a.

[0099] Specifically, multiple auxiliary positioning holes 250a are arranged near the two first chips 210 and the three first connecting parts 220 to achieve multi-directional positioning of the first bypass module 200, so that the force is evenly distributed, effectively preventing deformation, warping and shaking, and ensuring stable and reliable electrical connection; at the same time, the existing space is fully utilized without increasing the module volume, improving the structural compactness and vibration resistance.

[0100] Optionally, please refer to Figure 2 , Figure 5 and Figure 6 In some embodiments, the first bypass module 200 includes two molding compounds 240, which respectively encapsulate two first chips 210.

[0101] Specifically, the first bypass module 200 uses two molding compounds 240 to independently encapsulate the two first chips 210, providing independent protection and insulation for each chip, effectively preventing mutual interference between chips and improving operational stability; at the same time, it also provides dustproof, waterproof, and mechanical damage protection, ensuring reliable chip operation and extending service life. The two molding compounds 240 are defined below as the first molding compound 240a and the second molding compound 240b.

[0102] The specific shape of the molding compound 240 can be set according to the actual situation. For example, the molding compound 240 can be set in the shape of a 7, L, T, or I. Optionally, please refer to Figure 2 , Figure 5 and Figure 6In some embodiments, the molding compound 240 includes a covered portion 241 and an extension portion 242 connected together. The covered portion 241 covers the first chip 210, and the extension portion 242 is located on the side of the covered portion 241 close to the first connecting portion 220 in the spacing direction of the two first chips 210. A portion of the extension portion 242 is opposite to the first connecting portion 220 in a direction perpendicular to the spacing direction of the two first chips 210.

[0103] Specifically, the covering portion 241 typically extends along the width direction of the first junction box 100, and the extension direction of the extension portion 242 intersects the extension direction of the covering portion 241. For example, the extension direction of the extension portion 242 can be the length direction of the first junction box 100, that is, the extension direction of the extension portion 242 is perpendicular or approximately perpendicular to the extension direction of the covering portion 241. In this case, the encapsulated body 240 is L-shaped. Alternatively, the angle between the extension direction of the extension portion 242 and the extension direction of the covering portion 241 can be acute, in which case the encapsulated body 240 is L-shaped. The L-shaped or L-shaped encapsulated body 240 can provide higher mechanical strength for the first bypass module 200, further improving the module's bending resistance and effectively preventing it from bending and deforming under stress.

[0104] Optionally, please refer to Figure 5 and Figure 6 In some embodiments, the first bypass module 200 includes a first molding compound 240a, which encapsulates the first bypass chip 210a. A portion of the first molding compound 240a is opposite to the first busbar connection portion 220a in the arrangement direction of the first busbar connection portion 220a.

[0105] Specifically, the covering portion 241 of the first molding compound 240a covers the first bypass chip 210a, and the extension portion 242 of the first molding compound 240a is opposite to the first busbar connection portion 220a in the width direction of the first junction box 100. In this way, the first molding compound 240a can effectively protect the first bypass chip 210a and ensure that the first bypass chip 210a works stably and reliably. At the same time, the first molding compound 240a can form structural support for the first busbar connection portion 220a, thereby improving the mechanical strength and deformation resistance of the first busbar connection portion 220a.

[0106] Optionally, please refer to Figure 5 and Figure 6 In some embodiments, the first bypass module 200 includes a second molding compound 240b that covers the second bypass chip 210b, and a portion of the second molding compound 240b is opposite to the third busbar connection portion 220c in the arrangement direction of the third busbar connection portion 220c.

[0107] Specifically, the covering portion 241 of the second molding compound 240b covers the second bypass chip 210b, and the extension portion 242 of the second molding compound 240b is opposite to the third busbar connection portion 220c in the width direction of the first junction box 100. In this way, the second molding compound 240b can effectively protect the second bypass chip 210b and ensure that the second bypass chip 210b works stably and reliably. At the same time, the second molding compound 240b can also form structural support for the third busbar connection portion 220c, improving the mechanical strength and deformation resistance of the third busbar connection portion 220c.

[0108] Optionally, please refer to Figure 5 and Figure 6 In some embodiments, the first molding body 240a and the second molding body 240b extend to the side away from the second clearance hole 230b in the arrangement direction of the first busbar connection portion 220a, respectively.

[0109] Specifically, the extensions 242 of the first molding compound 240a and the second molding compound 240b are both located on the side of the second busbar connection 220b away from the second clearance hole 230b in the width direction of the first junction box 100. The extensions 242 of the first molding compound 240a and the second molding compound 240b extend to the first clearance hole 230a and the third clearance hole 230c, respectively. This can effectively strengthen the surrounding area of ​​the three clearance holes 230, improve the mechanical strength and deformation resistance of the three clearance holes 230, avoid damage when the busbar is installed, and improve the overall structural stability and electrical safety of the bypass module.

[0110] Optionally, please refer to Figure 6 and Figure 7In some embodiments, the first substrate 260 includes a first conductive element 261, a second conductive element 262, a third conductive element 263, a first connector 264, and a second connector 265. The first conductive element 261, the second conductive element 262, and the third conductive element 263 all extend along the length direction of the first junction box 100. The first conductive element 261 and the third conductive element 263 are located on the same side of the second conductive element 262 in the width direction of the first junction box 100. The first conductive element 261 and the third conductive element 263 are spaced apart in the length direction of the first junction box 100. The second conductive element 262 has a first conductive element 264 located on the first conductive element 265. A first protrusion is provided between the conductive member 261 and the third conductive member 263. A first bypass chip 210a is provided at the end of the second conductive member 262 near the first conductive member 261. A first connector 264 arranged along the width direction of the first junction box 100 is provided between the first bypass chip 210a and the first conductive member 261. A second bypass chip 210b is provided at the end of the third conductive member 263 away from the first conductive member 261. A second connector 265 arranged along the width direction of the first junction box 100 is provided between the second bypass chip 210b and the end of the second conductive member 262 near the third conductive member 263.

[0111] Specifically, a second busbar connection portion 220b is provided on the first protrusion. A first clearance hole 230a is formed between the first protrusion and the first conductive member 261, and a third clearance hole 230c is formed between the first protrusion and the third conductive member 263. The second clearance hole 230b is formed on the side of the first protrusion near the second busbar connection portion 220b in the width direction of the first junction box 100. The first busbar connection portion 220a is provided at one end of the first conductive member 261 near the first protrusion, and the third busbar connection portion 220c is provided at one end of the third conductive member 263 near the first protrusion. A first encapsulation body 240a fills the gap between one end of the second conductive member 262 and the first conductive member 261, and a second encapsulation body 240b fills the gap between one end of the third conductive member 263 and the second conductive member 262. By using a molding process to completely encapsulate and isolate the conductive components, the space occupied by the first bypass module 200 can be effectively reduced, thereby achieving a miniaturized and compact design of the overall size of the first junction box 100. The first auxiliary positioning hole 250a can be located on the second conductive component 262.

[0112] Optionally, please refer to Figure 6 and Figure 7 In some embodiments, the second conductive member 262 has a second protrusion at one end near the first conductive member 261, the first bypass chip 210a is disposed on the second protrusion, the first conductive member 261 has a recess, and at least a portion of the second protrusion is located in the recess.

[0113] Specifically, the second protrusion on the second conductive element 262 and the recess on the first conductive element 261 are nested together, which can not only achieve precise positioning and assembly of the second conductive element 262 and the first conductive element 261, but also make full use of the internal space, reduce the overall volume occupied by the first bypass module 200, and improve the structural compactness and connection reliability.

[0114] Optionally, please refer to Figure 3 and Figure 4 In some embodiments, the first junction box 100 has a bottom wall located on the side of the first bypass module 200 away from the first connection portion 220. The outer surface of the bottom wall of the first junction box 100 is provided with support feet 160, and multiple support feet 160 are provided at intervals along the circumference of the first junction box 100.

[0115] Specifically, a plurality of support feet 160 are evenly spaced at the edge of the outer surface of the bottom wall of the first junction box 100. Among the plurality of support feet 160 are long strip support feet extending along the length direction of the first junction box 100, which can effectively disperse the concentrated stress generated during installation due to the large length of the first junction box 100, thereby preventing the photovoltaic module from bursting.

[0116] Optionally, please refer to Figure 3 In some embodiments, the bottom wall of the first junction box 100 is provided with a first through hole.

[0117] Specifically, the bottom wall of the first junction box 100 is provided with multiple first through holes (i.e., first groove 150a, second groove 150b, and first through hole) to form a large-area void structure on the bottom wall of the first junction box 100. This effectively improves the flowability and filling uniformity of the potting compound during installation, ensuring the potting effect; at the same time, it increases the heat dissipation area, optimizes the heat dissipation channel, and significantly improves the heat dissipation efficiency of the first junction box 100. In addition, the void structure can reduce the amount of plastic raw materials used, reducing material costs while ensuring structural strength and improving product economy. A first connecting hole can be provided between two adjacent first through holes to allow the two adjacent first through holes to be connected.

[0118] A second cable 310 is provided at one end of the second junction box 300. The specific method of fixing the second cable 310 to the second junction box 300 can be set according to the actual situation. For example, the second cable 310 can be fixed to the second junction box 300 by screws or clips. Optionally, please refer to Figure 1 and Figure 3In some embodiments, a second mounting groove is provided on the bottom wall of the second junction box 300, and one end of the second cable 310 extends into the second junction box 300 from the second mounting groove. A second pressure block 600b is provided in the second mounting groove, and the second pressure block 600b abuts against the side of the bottom wall of the groove away from the second mounting groove of the second cable 310.

[0119] Specifically, when the second junction box 300 is installed on the photovoltaic module, the bottom wall of the second junction box 300 is flush with the back of the photovoltaic module. A second mounting groove adapted to the shape of the second pressure block 600b is provided on the bottom wall of the second junction box 300, allowing the second pressure block 600b to be embedded within the second mounting groove. The second pressure block 600b forms a lateral abutment and compression on the second cable 310 within the second mounting groove, effectively limiting and fixing the second cable 310, preventing it from shifting, loosening, or coming off during use, and ensuring the stability of the second cable 310 connection. Furthermore, this compression structure reduces the gap between the second cable 310 and the second junction box 300, enhancing the dustproof and waterproof protection of the second junction box 300. The overall structure is simple and easy to assemble, simplifying the installation process and improving assembly efficiency. The second pressure block 600b can be fixed to the second junction box 300 by screws, adhesive, or clips. For example, please refer to... Figure 1 and Figure 3 In some embodiments, the second pressure block 600b, the second junction box 300, and the second cable 310 are fixed by ultrasonic welding, which is a relatively simple way to fix the second pressure block 600b.

[0120] The second bypass module 400 is disposed within the second junction box 300, which typically has a cover. Alternatively, please refer to... Figure 1 In some embodiments, a second opening is provided on the top wall of the second junction box 300, and a second cover 500b is detachably provided on the second junction box 300 for opening and closing the second opening.

[0121] Specifically, the top and bottom walls of the second junction box 300 are spaced apart and opposite each other along the height of the second junction box 300. After the second bypass module 400 is installed into the second junction box 300 through the second opening, the second junction box 300 can be sealed closed by the second cover 500b. Thus, the second opening on the second junction box 300, combined with the detachable second cover 500b, facilitates the installation of the second bypass module 400 into the second junction box 300. Furthermore, the second cover 500b effectively protects the electrical connection parts inside the second junction box 300, preventing dust, moisture, and foreign objects from entering the interior of the second junction box 300, ensuring the safety and reliability of the electrical connections. The detachable structure also facilitates subsequent troubleshooting and component replacement, improving overall ease of use. The second cover 500b can be fixed to the second junction box 300 by screws, adhesive, or clips.

[0122] The second bypass module 400 is provided with a second chip 410 and a second connection portion 420, and the second bypass module 400 is electrically connected to a second cable 310. The second bypass module 400 typically includes a conductor electrically connected to the second chip 410, the second connection portion 420, and the second cable 310. Optionally, please refer to... Figures 8 to 10 In some embodiments, the second bypass module 400 includes a second base 460, on which a second chip 410 and a second connection portion 420 are disposed, and one end of the second base 460 is electrically connected to the second cable 310 in the length direction of the second junction box 300.

[0123] Specifically, the second bypass module 400 is integrated onto the second base 460, combining the second chip 410 and the second connector 420 into a single unit. This compact structure and high integration reduce the overall space required. Simultaneously, one end of the second base 460 is directly electrically connected to the second cable 310, shortening the electrical connection path, reducing line loss and signal interference, and improving conductivity and signal transmission stability. This integrated arrangement simplifies the wiring structure within the second junction box 300, making assembly more convenient and facilitating modular assembly and replacement, resulting in higher maintenance efficiency. It also makes the internal layout of the second junction box 300 more organized, reducing the risk of interference between components. The following description will use the second bypass module 400, including the second base 460, as an example.

[0124] The specific fixing method between the second substrate 460 and the second cable 310 can be set according to the actual situation. For example, the second substrate 460 and the second cable 310 can be fixed by resistance welding, riveting, or ultrasonic welding. Optionally, please refer to Figures 8 to 10In some embodiments, the surface of the second substrate 460 near the second cable 310 is provided with a second rib extending along the width direction of the second junction box 300, and the second rib abuts against the second cable 310.

[0125] Specifically, the second substrate 460 contacts the second cable 310 through the second rib, which can increase the contact area between the second substrate 460 and the second cable 310 and ensure reliable contact, thereby facilitating a stable and low-resistance electrical connection between the second substrate 460 and the second cable 310.

[0126] The second bypass module 400 is provided with a second chip 410 and two second connecting parts 420. The specific arrangement of the second chip 410 and the two connecting parts 420 can be set according to the actual situation. For example, one second chip 410 and two second connecting parts 420 can be arranged along the length direction of the second junction box 300; one second chip 410 and two second connecting parts 420 can also be arranged along the width direction of the second junction box 300. Optionally, please refer to Figure 1 , Figure 2 , Figure 11 and Figure 12 In some embodiments, two second connection portions 420 are disposed on both sides of the second chip 410 in the length direction of the second junction box 300.

[0127] Specifically, a second chip 410 and two second connectors 420 are arranged along the length of the second junction box 300, with the second chip 410 located between the two second connectors 420. This arrangement of the second chip 410 and the two second connectors 420 along the length of the second junction box 300 results in a shorter and more symmetrical electrical path for the second bypass module 400, effectively reducing line impedance and heat generation, and improving current transmission uniformity. Simultaneously, this layout of one second chip 410 and two second connectors 420 fully utilizes the length of the second junction box 300, making the overall structure more compact, reducing the internal volume occupied by the second junction box 300, and facilitating orderly connection of busbars, simplifying assembly and subsequent maintenance.

[0128] The second connecting part 420 is typically the welding position of the second junction box 300 for welding the busbar. The second connecting part 420 and the busbar can be welded and fixed by methods such as soldering, laser welding, or ultrasonic welding. The second connecting part 420 can be a solder block, and the welding position of the second connecting part 420 can be provided with a solder reservoir or other fixing structure to fix the solder block at the welding position of the second connecting part 420. The following description will use a square solder block as an example.

[0129] The two second connecting portions 420 are typically arranged in parallel or approximately parallel directions. The arrangement direction of the second connecting portions 420 (i.e., the length direction of the second connecting portions 420) can be set according to actual conditions. For example, the arrangement direction of the second connecting portions 420 can be the length direction of the second junction box 300; the arrangement direction of the second connecting portions 420 can also be the width direction of the second junction box 300. Optionally, please refer to... Figure 8 and Figure 9 In some embodiments, the arrangement direction of the second connecting portion 420 is the width direction of the second junction box 300.

[0130] Optionally, please refer to Figures 8 to 10 In some embodiments, the second bypass module 400 is provided with two fourth clearance holes 430 for the busbar to pass through.

[0131] Specifically, the second bypass module 400 is electrically connected to two busbars respectively through two second connecting parts 420. The second base 460 of the second bypass module 400 is provided with at least two fourth clearance holes 430 corresponding to the busbars, which can provide independent passage space for the two busbars, realize the orderly passage and positioning of the busbars, avoid the busbars from tangling, squeezing or interfering with each other, reduce the risk of short circuit, and the fourth clearance holes 430 can also form a certain limit constraint on the busbars to prevent the busbars from shaking and shifting, and ensure the reliability of the connection.

[0132] The specific locations of the two fourth clearance holes 430 on the second bypass module 400 can be set according to actual conditions. For example, the two fourth clearance holes 430 are usually located close to the two second connecting portions 420, respectively. Optionally, please refer to Figures 8 to 10 In some embodiments, the two fourth clearance holes 430 are located on both sides of the second chip 410 in the length direction of the second junction box 300, and the two fourth clearance holes 430 are located between the two second connecting portions 420.

[0133] Specifically, a fourth clearance hole 430 is provided between each second connection part 420 and the second chip 410. In this way, the second bypass module 400 is arranged with two second connection parts 420 and two fourth clearance holes 430, which can make full use of the gap space between the two second connection parts 420 and the second chip 410, making the overall structure more compact and reducing the volume of the second bypass module 400. At the same time, the fourth clearance holes 430 and the second connection parts 420 are arranged in separate areas, which can effectively avoid mutual interference and cross short circuits between busbars, and improve insulation safety and wiring neatness.

[0134] The shape of the fourth clearance hole 430 is typically adapted to the shape of the busbar, for example, see [reference needed]. Figures 8 to 10In some embodiments, the fourth clearance hole 430 is a square hole, and the following description will take a square hole as an example. The extending direction of the fourth clearance hole 430 (i.e., the length direction of the fourth clearance hole 430) is usually parallel or approximately parallel to the arrangement of the second connecting portion 420. For example, please refer to... Figures 8 to 10 In some embodiments, the extension direction of the fourth clearance hole 430 can be the width direction of the second junction box 300.

[0135] The second junction box 300 is typically provided with a fourth through hole 330 so that an external busbar can be inserted into the second junction box 300 through the fourth through hole 330. Optionally, please refer to Figure 3 In some embodiments, the second junction box 300 has a bottom wall located on the side of the second bypass module 400 away from the second connection portion 420. The bottom wall of the second junction box 300 is provided with two fourth through holes 330 for the busbar to pass through. The two fourth through holes 330 are respectively opposite to the two fourth clearance holes 430 in the direction in which the fourth clearance holes 430 penetrate the second bypass module 400.

[0136] Specifically, the two fourth through holes 330 are respectively positioned directly opposite the two fourth clearance holes 430 in the height direction of the second junction box 300, and the shapes of the fourth through holes 330 and the fourth clearance holes 430 are generally adapted to each other. For example, please refer to... Figure 3 In some embodiments, the fourth perforation 330 is a square hole, and the extension direction of the fourth perforation 330 is the width direction of the second junction box 300.

[0137] Optionally, please refer to Figure 3 In some embodiments, the outer surface of the bottom wall of the second junction box 300 is provided with two fourth grooves 340, and two fourth through holes 330 are respectively provided on the bottom wall of the two fourth grooves 340; in the length direction of the second junction box 300, the size of the end of the fourth groove 340 away from the fourth through hole 330 is larger than the size of the end of the fourth groove 340 close to the fourth through hole 330.

[0138] Specifically, the outer surface of the bottom wall of the second junction box 300 is provided with a fourth groove 340 corresponding to the fourth through hole 330. Since the fourth groove 340 is set with a large opening and a small bottom (i.e., the groove opening is large and the groove bottom is small), it is easy to smoothly insert the busbar into the fourth through hole 330. In addition, the fourth groove 340 can play a certain role in limiting and regulating the busbar.

[0139] The fourth groove 340 is designed with a wider opening and a narrower bottom. Optionally, please refer to [link / reference needed]. Figure 3In some embodiments, from the opening of the fourth groove 340 to the fourth through hole 330, the size of the fourth groove 340 gradually decreases in the length direction of the second wire box 300, so as to form a fifth guide slope in the fourth groove 340 near the groove sidewall of the second chip 410 and / or away from the groove sidewall of the second chip 410.

[0140] Specifically, a fifth guide slope is provided on the side wall of the fourth groove 340. The fifth guide slope can smoothly guide the insertion process of the busbar, allowing the busbar to slide smoothly into the fourth through hole 330 along the fifth guide slope. This effectively avoids rigid collision and jamming between the end of the busbar and the side wall of the fourth groove 340, significantly reducing assembly difficulty and improving assembly efficiency.

[0141] Optionally, please refer to Figures 8 to 10 In some embodiments, the second bypass module 400 is provided with a second positioning hole 450, and the inner surface of the second junction box 300 is provided with a second positioning post 320 that positions and cooperates with the second positioning hole 450.

[0142] Specifically, the second bypass module 400 has one or more second positioning holes 450 extending through it. Correspondingly, the inner surface of the second junction box 300 has one or more second positioning posts 320. Each second positioning post 320 is engaged with a corresponding second positioning hole 450, thus providing support and positioning for the second bypass module 400. The second junction box 300 and the second bypass module 400 can be fixed together by hot riveting or cold pressing using the second positioning posts 320.

[0143] The second positioning holes 450 are typically provided in multiples at intervals along the circumference of the second bypass module 400. Optionally, please refer to... Figures 8 to 10 In some embodiments, the second positioning hole 450 includes a second auxiliary positioning hole 450a that is opposite to the second connecting portion 420 in the width direction of the second junction box 300.

[0144] Specifically, the second bypass module 400 is provided with a second auxiliary positioning hole 450a in the middle. Through the cooperation of the second auxiliary positioning hole 450a and the second positioning post 320, the deformation and arching of the second bypass module 400 during installation and use can be effectively avoided, thereby ensuring the reliable operation of the second bypass module 400 and preventing electrical connection failure caused by deformation.

[0145] Optionally, please refer to Figure 2 , Figure 8 and Figure 9 In some embodiments, the second bypass module 400 includes a third molding compound 440 that encapsulates the second chip 410.

[0146] Specifically, the third molding compound 440 provides protection and insulation for the second chip 410, improving operational stability. It also provides dustproof, waterproof, and mechanical damage protection, ensuring reliable chip operation and extending its lifespan. The specific shape of the third molding compound 440 can be customized according to specific requirements; for example, it can be shaped like a 7, L, T, or I. Optionally, please refer to... Figure 2 , Figure 8 and Figure 9 In some embodiments, the third molding compound 440 is arranged in an I-shape.

[0147] Optionally, please refer to Figure 9 and Figure 10 In some embodiments, the second substrate 460 includes a fourth conductive element 461, a fifth conductive element 462, and a third connector 463. The fourth conductive element 461 and the fifth conductive element 462 are arranged at intervals along the length of the second junction box 300. A second chip 410 is provided at one end of the fourth conductive element 461 near the fifth conductive element 462. A third connector 463 is arranged along the length of the second junction box 300 between the second chip 410 and the fifth conductive element 462.

[0148] Specifically, the fourth conductive element 461 and the fifth conductive element 462 are each provided with two second connecting portions 420, and the fourth conductive element 461 and the fifth conductive element 462 are each provided with two fourth clearance holes 430. The third encapsulation body 440 fills the gap between the fourth conductive element 461 and the fifth conductive element 462. By using the encapsulation process to completely encapsulate and isolate the conductive elements, the space occupied by the second bypass module 400 can be effectively reduced, thereby achieving a miniaturized and compact design of the overall volume of the second junction box 300. The second auxiliary positioning hole 450a can be provided on the fifth conductive element 462.

[0149] Optionally, please refer to Figure 3 In some embodiments, the second junction box 300 has a bottom wall located on the side of the second bypass module 400 away from the second connection portion 420. The outer surface of the bottom wall of the second junction box 300 is provided with support protrusions, and multiple support protrusions are provided at intervals along the circumference of the second junction box 300.

[0150] Specifically, multiple support protrusions are evenly spaced along the edge of the outer surface of the bottom wall of the second junction box 300, which can effectively disperse the concentrated stress generated during installation due to the large length of the second junction box 300, thereby preventing the photovoltaic module from bursting.

[0151] Optionally, please refer to Figure 3In some embodiments, the bottom wall of the second junction box 300 is provided with a second through hole.

[0152] Specifically, the bottom wall of the second junction box 300 is provided with multiple second through holes (i.e., the fourth groove 340 and the second through hole) to form a large-area void structure on the bottom wall of the second junction box 300. This effectively improves the flowability and filling uniformity of the potting compound during installation, ensuring the potting effect; at the same time, it increases the heat dissipation area, optimizes the heat dissipation channel, and significantly improves the heat dissipation efficiency of the second junction box 300. In addition, the void structure can reduce the amount of plastic raw materials used, reducing material costs while ensuring structural strength and improving product economy. A second connecting hole can be provided between two adjacent second through holes to allow the two adjacent second through holes to be connected.

[0153] This application also provides a photovoltaic module, which includes a string of solar cells and a photovoltaic junction box 1000, wherein the string of solar cells is electrically connected to the photovoltaic junction box 1000. Since the photovoltaic junction box 1000 adopts the technical solution of the above embodiments, it has the beneficial effects brought about by the technical solution of the above embodiments.

[0154] Those skilled in the art will understand that the above embodiments are specific examples of implementing this application, and in practical applications, various changes in form and detail can 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 in that, include: A first junction box, one end of which is provided with a first cable, and a first bypass module electrically connected to the first cable is provided inside the first junction box. The first bypass module is provided with a first chip and a first connection part for electrically connecting to the busbar. The second junction box has a second cable at one end and a second bypass module electrically connected to the second cable inside. The second bypass module has a second chip and a second connection part for electrically connecting to the busbar. Two of the first chips are arranged at intervals along a direction from the end of the first junction box near the first cable to the end away from the first cable, and three first connection portions are arranged between the two first chips.

2. The photovoltaic junction box according to claim 1, characterized in that, The two first chips are a first bypass chip and a second bypass chip, respectively, with the second bypass chip located on the side of the first bypass chip away from the first cable; The three first connection parts are a first busbar connection part, a second busbar connection part, and a third busbar connection part. The first busbar connection part is located between the second busbar connection part and the first bypass chip, and the third busbar connection part is located between the second busbar connection part and the second bypass chip.

3. The photovoltaic junction box according to claim 2, characterized in that, The arrangement direction of the first busbar connection and the arrangement direction of the third busbar connection are both perpendicular to the arrangement direction of the second busbar connection; and / or, The second busbar connection is arranged along the spacing direction of the two first chips.

4. The photovoltaic junction box according to claim 3, characterized in that, The first bypass module is provided with a clearance hole for the busbar to pass through, the clearance hole including a first clearance hole, a second clearance hole and a third clearance hole; The first clearance hole is located between the first busbar connection portion and the second busbar connection portion; The third clearance hole is located between the second busbar connection portion and the third busbar connection portion; The second clearance hole is located between the first clearance hole and the third clearance hole, and the second clearance hole is located on one side of the second busbar connection portion in the arrangement direction of the first busbar connection portion.

5. The photovoltaic junction box according to claim 4, characterized in that, The first bypass module includes a first molding compound that encapsulates the first bypass chip, and a portion of the first molding compound is opposite to the first busbar connection portion in the arrangement direction of the first busbar connection portion; and / or, The first bypass module includes a second molding compound that encapsulates the second bypass chip, and a portion of the second molding compound is opposite to the third busbar connection portion in the arrangement direction of the third busbar connection portion.

6. The photovoltaic junction box according to claim 5, characterized in that, The first molding body and the second molding body extend to the first clearance hole and the third clearance hole on the side away from the second clearance hole in the arrangement direction of the first busbar connection portion.

7. The photovoltaic junction box according to claim 5, characterized in that, The first bypass module is provided with a first positioning hole, and the inner surface of the first junction box is provided with a first positioning post that positions and cooperates with the first positioning hole. The first positioning hole includes a first auxiliary positioning hole located between the first molding body and the second molding body.

8. The photovoltaic junction box according to claim 7, characterized in that, The first clearance hole and the third clearance hole are both provided with the first auxiliary positioning hole on the hole wall near the second busbar connection portion; and / or, The first bypass module has the first auxiliary positioning hole on the surface of the first busbar connection part away from the second clearance hole in the arrangement direction of the first busbar connection part.

9. The photovoltaic junction box according to claim 4, characterized in that, The first junction box has a bottom wall located on the side of the first bypass module away from the first connection portion. The bottom wall of the first junction box has a through-hole for the busbar to pass through. The through-hole includes a first through-hole, a second through-hole, and a third through-hole. The first through-hole, the second through-hole, and the third through-hole are respectively opposite to the first clearance hole, the second clearance hole, and the third clearance hole in the direction in which the clearance hole penetrates the first bypass module, wherein: The second perforation is located near the same end of the first perforation and the third perforation in the arrangement direction of the first busbar connection portion; or, the second perforation is located near the middle of the first perforation and the third perforation.

10. The photovoltaic junction box according to claim 9, characterized in that, The inner surface of the bottom wall of the first junction box is provided with a first protrusion, a portion of which extends into the first clearance hole and is provided with the first through hole; and / or, The inner surface of the bottom wall of the first junction box is provided with a second protrusion, and a portion of the second protrusion extends into the third clearance hole and is provided with the third through hole.

11. The photovoltaic junction box according to claim 9, characterized in that, The outer surface of the bottom wall of the first junction box is provided with a first groove, a second groove, and a third groove. The first through hole, the second through hole, and the third through hole are respectively provided on the bottom wall of the first groove, the second groove, and the third groove. The first junction box satisfies at least one of the following conditions: In the arrangement direction of the second busbar connection, the size of the end of the first groove away from the first through hole is larger than the size of the end of the first groove close to the first through hole; In the arrangement direction of the first busbar connection portion, the size of the end of the second groove away from the second through hole is larger than the size of the end of the second groove close to the second through hole; In the arrangement direction of the second busbar connection, the dimension of the end of the third groove away from the third through hole is larger than the dimension of the end of the third groove close to the third through hole.

12. The photovoltaic junction box according to claim 11, characterized in that, The second groove has a first groove edge, which is located near the middle of the first busbar connection in the arrangement direction of the first busbar connection. The center of the first perforation and the center of the third perforation are both located on the side of the first groove edge near the second perforation.

13. The photovoltaic junction box according to claim 1, characterized in that, The first bypass module includes two molding compounds, each of which encapsulates two of the first chips. Each molding compound includes a connected covering portion and an extension portion. The covering portion encapsulates the first chip, and the extension portion is located on the side of the covering portion closer to the first connecting portion in the spacing direction between the two first chips. A portion of the extension portion is opposite to the first connecting portion in a direction perpendicular to the spacing direction between the two first chips.

14. The photovoltaic junction box according to claim 1, characterized in that, The first junction box has a bottom wall located on the side of the first bypass module away from the first connection part. The outer surface of the bottom wall of the first junction box is provided with support feet, and multiple support feet are provided at intervals along the circumference of the first junction box.

15. A photovoltaic module, characterized in that, Including the photovoltaic junction box as described in any one of claims 1-14.

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