Photovoltaic junction box and photovoltaic module

Abstract

The utility model discloses a photovoltaic junction box and a photovoltaic assembly, and belongs to the field of photovoltaic technology. The photovoltaic junction box comprises a box body, a diode module and a base. A containing cavity with one end opened is formed in the box body, and a boss and an exhaust hole are arranged on the inner bottom wall of the box body. The diode module is installed in the containing cavity and supported on the boss, the diode module and the inner bottom wall of the box body are arranged in a spaced mode, the exhaust hole faces the diode module, and the containing cavity is filled with pouring sealant wrapping the diode module. The base is installed at the open end of the box body. Through the synergistic effect of the box body, the diode module, the base and other components, the protection and electrical connection functions of the photovoltaic module can be realized, the structure of the photovoltaic junction box is optimized, the heat dissipation capability of the photovoltaic junction box can be improved, and the working temperature of the diode module can be reduced, so that the working safety and reliability of the diode module are improved, and the service life of the diode module is prolonged. And a diode module with lower configuration can be used, so that the cost is effectively reduced.

Description

Technical Field

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

[0002] In order to avoid the loss of power generation efficiency and component safety risks caused by the hot spot effect in photovoltaic modules, one or more bypass diodes are usually installed in the photovoltaic junction box. At present, the typical photovoltaic junction box is a glue-filled junction box, and the diode packaging method is an axial, patch or modular structure. As the power requirements of photovoltaic modules are getting higher and higher, the short-circuit current and working current of the modules are increasing, and the heat generated by the diodes when working in the forward direction is also increasing, and the heat resistance of the junction box is getting higher and higher. However, the heat dissipation capacity of the current mainstream junction box is relatively poor, and it cannot conduct and dissipate the heat generated by the diodes when working in the forward direction in time, resulting in a high operating temperature of the junction box, which cannot meet the performance requirements of photovoltaic modules and has reliability risks. Therefore, there is room for improvement in the structure and heat dissipation capacity of the junction box. Utility Model Content

[0003] The present application aims to at least solve the technical problem that the heat dissipation capacity of photovoltaic junction boxes in the related art is relatively poor. To this end, the present application proposes a photovoltaic junction box and a photovoltaic module, which can improve the heat dissipation capacity of the photovoltaic junction box while ensuring that the cost is basically the same by optimizing the structure of the photovoltaic junction box, thereby improving the safety and reliability of the diode working outdoors.

[0004] In a first aspect, the present application provides a photovoltaic junction box, comprising:

[0005] A box body, wherein the box body forms a receiving cavity with one end open, and the inner bottom wall of the box body is provided with a boss and an exhaust hole;

[0006] A diode module, the diode module is installed in the accommodating cavity and supported on the boss, the diode module is spaced apart from the inner bottom wall of the box body, the exhaust hole faces the diode module, and the accommodating cavity is filled with a potting glue that wraps the diode module;

[0007] A base is mounted on the open end of the box body.

[0008] Through the coordinated action of the box body, the diode module, the base and other components, the protection and electrical connection functions of the photovoltaic components are achieved, the structure of the photovoltaic junction box is optimized, the heat dissipation capacity of the photovoltaic junction box can be improved, and the working temperature of the diode module can be reduced, thereby improving the safety and reliability of the diode module. At the same time, when the operating temperatures of the diode modules are close, the diode modules with lower configurations can be used, thereby effectively reducing costs.

[0009] According to an embodiment of the present application, the boss includes a first boss and a second boss that are spaced apart from each other, and the exhaust hole is disposed between the first boss and the second boss.

[0010] By setting the first boss and the second boss apart and the exhaust hole therebetween, exhaust can be effectively discharged, potting efficiency can be improved, space utilization can be optimized, product reliability can be improved, subsequent processes can be simplified, and thermal management can be enhanced.

[0011] According to an embodiment of the present application, the first boss and the second boss are arranged to be inclined toward each other's sides, and are inclined in directions away from each other along a direction away from the inner bottom wall of the box body.

[0012] The first boss and the second boss are arranged to be inclined toward each other's sides, which not only facilitates the discharge of gas and the uniform filling of the potting compound, but also improves the stability of the structure and the thermal management effect.

[0013] According to an embodiment of the present application, a limiting flange is provided on a side of the first boss facing away from the second boss, and the limiting flange protrudes from the top surface of the first boss.

[0014] The limiting flange is provided on the side of the first boss facing away from the second boss, and the limiting flange protrudes from the top surface of the first boss, which can accurately position and prevent excessive movement, and can also enhance structural strength, simplify the assembly process, and improve equipment performance.

[0015] According to one embodiment of the present application, the inner bottom wall of the box body is provided with a supporting portion surrounding the boss, the supporting portion protrudes from the inner bottom wall of the box body, the distance from the top surface of the supporting portion to the inner bottom wall of the box body is greater than the distance from the top surface of the boss to the inner bottom wall of the box body, and the connection row of the diode module is supported by the supporting portion.

[0016] The inner bottom wall of the box body is provided with the supporting portion and the positioning column surrounding the boss, and the supporting portion and the positioning column protrude from the inner bottom wall of the box body, providing stable support for the connection row of the diode module, which not only ensures the stability and reliability of the diode module, but also enhances the structural strength of the box body and simplifies the installation and maintenance process.

[0017] According to an embodiment of the present application, there are multiple support parts, and they are inclined along the direction away from the inner bottom wall of the box body toward the direction close to the boss.

[0018] The plurality of support portions inclined along a direction away from the bottom wall of the box body and toward a direction close to the boss can provide support for the box body and its internal components, guide assembly, increase structural stability, optimize space utilization and improve heat dissipation performance.

[0019] According to an embodiment of the present application, the inner wall of the box body is provided with a first heat dissipation rib protruding from the accommodating cavity, and the outer wall of the box body is provided with a protruding second heat dissipation rib.

[0020] The combined design of the first heat dissipation rib and the second heat dissipation rib increases the heat dissipation area on both the inner and outer sides of the box body, and improves the heat dissipation efficiency in different ways, which can effectively reduce the internal temperature of the box body, ensure the normal operation of internal components, and extend the service life of the equipment.

[0021] According to an embodiment of the present application, the first heat dissipation rib extends from the inner bottom wall of the box body to the open end and is spaced apart from the open end;

[0022] and / or,

[0023] The second heat dissipation rib extends from one end to the other end of the box body in the opening direction.

[0024] The first heat dissipation rib and the second heat dissipation rib are respectively arranged on the inner and outer sides of the box body, and both can increase the heat dissipation area and improve the heat dissipation efficiency in different ways. The first heat dissipation rib optimizes the heat dissipation effect by guiding the heat flow and enhancing the structural strength, while the second heat dissipation rib improves the overall performance of the box body by improving the heat dissipation effect. The heat dissipation structure composed of the first heat dissipation rib and the second heat dissipation rib can effectively reduce the internal temperature of the box body, ensure the normal operation of the internal components, and extend the service life of the equipment.

[0025] According to an embodiment of the present application, there are a plurality of first heat dissipation ribs, and the plurality of first heat dissipation ribs are spaced apart from each other;

[0026] and / or,

[0027] There are a plurality of second heat dissipation ribs, and the plurality of second heat dissipation ribs are arranged at intervals.

[0028] The first heat dissipation ribs and the second heat dissipation ribs, which are arranged at multiple intervals and within an appropriate range, construct an efficient heat dissipation network on both the inner and outer sides of the box body, which can not only increase the heat dissipation area and optimize the heat distribution, but also improve the structural strength of the box body. At the same time, through the coordinated heat dissipation method between the inside and the outside, the internal temperature of the box body can be significantly reduced, thereby ensuring the normal operation of the internal components and extending the service life of the equipment.

[0029] In a second aspect, the present application provides a photovoltaic module, comprising:

[0030] Laminate;

[0031] In the photovoltaic junction box as described in any one of the above items, the laminate is electrically connected to the photovoltaic junction box.

[0032] The laminate of the photovoltaic module and the photovoltaic junction box are electrically connected to achieve energy conversion and effective transmission of electric energy.

[0033] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0035] Figure 1 This is one of the structural schematic diagrams of the photovoltaic junction box provided in the embodiment of the present application;

[0036] Figure 2 This is the second structural schematic diagram of the photovoltaic junction box provided in the embodiment of the present application;

[0037] Figure 3 yes Figure 2 A partial enlarged view of the middle A;

[0038] Figure 4 This is the third structural schematic diagram of the photovoltaic junction box provided in the embodiment of the present application.

[0039] Reference numerals:

[0040] Photovoltaic junction box 1;

[0041] Box body 10, inner bottom wall 110, first boss 121, second boss 122, limiting flange 123, exhaust hole 130, glue inlet 140, support part 150, positioning column 160, first heat dissipation rib 171, second heat dissipation rib 172;

[0042] Base 20;

[0043] Accommodating chamber 30. DETAILED DESCRIPTION

[0044] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0045] The present application aims to at least solve the technical problem that the heat dissipation capacity of photovoltaic junction boxes in the related art is relatively poor. To this end, the present application proposes a photovoltaic junction box and a photovoltaic module, which can improve the heat dissipation capacity of the photovoltaic junction box while ensuring that the cost is basically the same by optimizing the structure of the photovoltaic junction box, thereby improving the safety and reliability of the diode working outdoors.

[0046] Reference below Figure 1-Figure 4 A photovoltaic junction box 1 according to an embodiment of the present application is described.

[0047] like Figure 2 and Figure 4 As shown, the photovoltaic junction box 1 includes: a box body 10 , a diode module and a base 20 .

[0048] The box body 10 forms a receiving cavity 30 with one end open, and the inner bottom wall 110 of the box body 10 is provided with a boss and an exhaust hole 130;

[0049] The diode module is installed in the accommodating cavity 30 and supported on the boss. The diode module is spaced apart from the inner bottom wall 110 of the box body 10. The exhaust hole 130 faces the diode module. The accommodating cavity 30 is filled with potting glue that wraps the diode module.

[0050] The base 20 is mounted on the open end of the box body 10 .

[0051] The box body 10 is the main external structure of the photovoltaic junction box 1, forming a accommodating cavity 30 with one end open, which is used to install and fix the internal electrical components. On the inner bottom wall 110 of the box body 10, there are provided a boss and an exhaust hole 130. The boss is used to support the diode module to ensure that the diode module is stable in the accommodating cavity 30 and has a certain space. The exhaust hole 130 faces the diode module and is used to discharge the air therein when the potting glue fills the accommodating cavity 30, so as to avoid the formation of bubbles in the potting glue and affect the performance of the photovoltaic junction box 1.

[0052] The diode module is a key electrical component of the photovoltaic junction box 1. Its main function is to protect the photovoltaic module and avoid damage due to local overheating, short circuit or other electrical problems. The diode module is installed in the accommodating cavity 30 and supported on a boss. There is a certain distance between the diode module and the inner bottom wall 110 of the box body 10, which helps to dissipate heat and prevent electrical contact.

[0053] The potting compound is a liquid filling material, which enters the interior of the photovoltaic junction box 1 through the potting port 140, and then solidifies at room temperature into a thermosetting polymer insulating material with excellent performance, and the thermal conductivity can be 0.3-0.4. For example, it can be made of epoxy resin, polyurethane or silicone, and is used to fill the accommodating cavity 30 and wrap the diode module, so as to protect and stabilize the electrical components, prevent water and dust, conduct heat and dissipate heat, and enhance the insulation performance and mechanical strength. The box body 10 can be made of a polymer material, and the thermal conductivity can be 0.15-0.3, such as polyphenylene ether or polyether amide. During the potting compound filling process, the exhaust hole 130 is conducive to the flow of the potting compound, and the space between the diode module and the base 20 can be filled with the potting compound. The high thermal conductivity of the potting compound can be used to directly take away the heat generated by the diode module, and ensure that the air can be discharged smoothly to avoid the formation of bubbles.

[0054] The base 20 is installed at the open end of the box body 10 to close the accommodating cavity 30 and protect the internal electrical components. The base 20 is usually connected to other external devices or cables to achieve electrical connection between the photovoltaic junction box 1 and the external system.

[0055] According to the photovoltaic junction box 1 provided in the embodiment of the present application, the protection and electrical connection functions of the photovoltaic components are realized through the coordinated action of components such as the box body 10, the diode module and the base 20, and the structure of the photovoltaic junction box 1 is optimized. The heat dissipation capacity of the photovoltaic junction box 1 can be improved, and the temperature of the diode module during operation can be reduced, thereby improving the safety and reliability of the operation of the diode module. At the same time, when the operating temperatures of the diode modules are close, a diode module with a lower configuration can be used, thereby effectively reducing costs.

[0056] In some embodiments, Figure 1-Figure 4 As shown, the boss includes a first boss 121 and a second boss 122 that are spaced apart from each other, and the exhaust hole 130 is disposed between the first boss 121 and the second boss 122 .

[0057] In the technical solution of the present application, the boss includes a first boss 121 and a second boss 122 that are spaced apart, which are generally used to enhance the strength and stability of the structure, support other components, or to separate or define specific spaces or areas. The exhaust hole 130 is located between the two bosses and can be used to discharge the gas generated in the closed space formed between the two bosses during the encapsulation process, reduce the formation of bubbles, improve the encapsulation quality, and help improve production efficiency and product qualification rate. At the same time, it can prevent pressure accumulation and ensure the normal operation of the system. The size and position of the exhaust hole 130 are determined according to specific application requirements to ensure sufficient exhaust volume and appropriate exhaust direction. The structure and size of the boss are also designed according to application requirements to ensure sufficient strength and stability.

[0058] By optimizing the layout of the bosses and the exhaust holes 130, the space can be maximized and the potting area can be ensured to be fully filled while avoiding unnecessary material waste. Good exhaust and potting effects can reduce potential problems in subsequent processes, such as bubble expansion, material deformation, etc., which helps to reduce production costs and improve product quality. At the same time, the first boss 121 and the second boss 122 are in contact with the diode module and can act as a heat sink. The position of the exhaust hole 130 allows air circulation, which helps to dissipate heat and prevent the diode module from overheating.

[0059] It can be understood that by setting the first boss 121 and the second boss 122 apart and the exhaust hole 130 therebetween, exhaust can be effectively discharged, potting efficiency can be improved, space utilization can be optimized, product reliability can be improved, subsequent processes can be simplified, and thermal management can be enhanced.

[0060] In some embodiments, Figure 1 As shown, the first boss 121 and the second boss 122 are arranged to be inclined toward each other's side surfaces, and are inclined in directions away from each other along a direction away from the inner bottom wall 110 of the box body 10 .

[0061] In the technical solution of the present application, the first boss 121 and the second boss 122 are spaced apart from each other, and the sides are inclined and facing each other. The inclined first boss 121 and the second boss 122 help to guide the gas to flow toward the exhaust hole 130. When the potting glue fills the accommodating cavity 30, the inclined boss can more effectively push the gas toward the exhaust hole 130, thereby reducing the formation of bubbles, and also increasing the structural stability of the boss. It can provide additional support when subjected to external force and reduce the risk of deformation or damage of the boss. At the same time, through the inclined setting, the boss can be more effectively arranged in a limited space to ensure that there is enough space for gas flow and exhaust.

[0062] During the potting process, the inclined boss side helps the potting compound flow and fill more evenly, thereby improving the quality and effect of potting. When the diode module or other electronic components generate heat during operation, the inclined boss side helps the heat diffusion and convection, thereby improving the thermal management effect.

[0063] It can be understood that the first boss 121 and the second boss 122 are arranged to be inclined toward each other's sides, which not only helps to discharge gas and evenly fill the potting compound, but also improves the stability of the structure and the thermal management effect.

[0064] In some embodiments, Figure 3 As shown, a limiting flange 123 is provided on the side of the first boss 121 facing away from the second boss 122 , and the limiting flange 123 protrudes from the top surface of the first boss 121 .

[0065] In the technical solution of the present application, the first boss 121 and the second boss 122 are two independent parts protruding from the surrounding surface, which are used to support and install the diode module. A limiting flange 123 is provided on the side of the first boss 121 away from the second boss 122, which is used to ensure that the diode module installed on the first boss 121 and the second boss 122 can be accurately positioned or restricted to prevent excessive movement. The limiting flange 123 protrudes from the top surface of the first boss 121 and can serve as a physical barrier to ensure that the flange can effectively contact or cooperate with the diode module to prevent the diode module from exceeding a predetermined range during installation, thereby helping to ensure the stability and reliability of the component or equipment.

[0066] The limiting flange 123 protrudes from the top surface of the first boss 121, which can not only provide a positioning function, but also enhance the structural strength of the first boss 121 to a certain extent. By adding additional material and making it protrude from the top surface, the limiting flange 123 can resist external impact or pressure, thereby protecting the first boss 121 from damage, and can simplify the alignment and positioning steps of components during the assembly process, easily achieve precise positioning, reduce assembly time and errors, and improve equipment performance.

[0067] It can be understood that a limiting flange 123 is provided on the side of the first boss 121 away from the second boss 122, and the limiting flange 123 protrudes from the top surface of the first boss 121, which can be accurately positioned to prevent excessive movement, and can also enhance structural strength, simplify the assembly process, and improve equipment performance.

[0068] In some embodiments, Figure 1 As shown, the inner bottom wall 110 of the box body 10 is provided with a supporting portion 150 surrounding the boss, the supporting portion 150 protrudes from the inner bottom wall 110 of the box body 10, the distance from the top surface of the supporting portion 150 to the inner bottom wall 110 of the box body 10 is greater than the distance from the top surface of the boss to the inner bottom wall 110 of the box body 10, and the connection row of the diode module is supported on the supporting portion 150.

[0069] A supporting portion 150 surrounding the boss is provided on the inner bottom wall 110 of the box body 10 and protrudes from the inner bottom wall 110 of the box body 10 for supporting specific components or parts, such as a diode module. The distance from the top surface of the supporting portion 150 to the inner bottom wall 110 of the box body 10 is greater than the distance from the top surface of the boss to the inner bottom wall 110 of the box body 10, that is, the supporting portion 150 provides an additional supporting plane that is higher than the boss. The connecting row of the diode module is supported on the supporting portion 150, which can ensure the stability and reliability of the diode module and reduce the risk of damage to the diode module due to vibration or impact.

[0070] The support portion 150 and the boss can be used together to accurately position the diode module. The boss can provide an initial positioning point, while the support portion 150 ensures that the diode module is correctly positioned in the box body 10, which is convenient for installation and maintenance. At the same time, by providing an additional support structure, the support portion 150 can enhance the structural strength of the box body 10 in this area, resist external pressure or impact, and protect the components in the box body 10.

[0071] In the technical solution of the present application, the photovoltaic junction box 1 may also include a plurality of positioning columns 160 surrounding the support portion 150 and a glue inlet 140. The glue inlet 140 is mainly used for injecting potting glue. The positioning columns 160 are installed on the inner bottom wall 110 of the box body 10. The distance from the top surface to the inner bottom wall 110 of the box body 10 is greater than the distance from the top surface of the support portion 150 to the inner bottom wall 110 of the box body 10. It is used for positioning and support, and can effectively avoid loosening or misalignment of components caused by vibration, impact and other factors during installation, use or maintenance. The material of the positioning column 160 is generally a material with good weather resistance, corrosion resistance and mechanical strength, such as stainless steel, aluminum alloy, etc. The positioning column 160 is connected to the diode module through a positioning hole cold riveting structure.

[0072] It can be understood that the inner bottom wall 110 of the box body 10 is provided with a support portion 150 and a positioning column 160 surrounding the boss, and the support portion 150 and the positioning column 160 protrude from the inner bottom wall 110 of the box body 10, providing a stable support for the connection row of the diode module, which can not only ensure the stability and reliability of the diode module, but also enhance the structural strength of the box body 10 and simplify the installation and maintenance process.

[0073] In some embodiments, Figure 1 and Figure 2 As shown, there are multiple supporting portions 150 , and they are inclined from the direction away from the inner bottom wall 110 of the box body 10 toward the direction close to the boss.

[0074] In the technical solution of the present application, the support portion 150 is inclined toward the direction close to the boss, which can provide an inclined support surface and optimize the support angle, so that the supported components, such as the connection row of the diode module, can better cooperate with the boss and may reduce movement or damage caused by vibration or impact.

[0075] The inclined support portion 150 can play a guiding role during the assembly process, guiding the supported portion 150 to enter the correct position and cooperate with the boss, thereby improving the accuracy and efficiency of assembly. Multiple inclined support portions 150 form a stable support network inside the box body 10, which increases the stability and reliability of the entire box body 10 and its internal components by providing additional support points and a stable structure. The inclined support portion 150 can also more effectively utilize the space inside the box body 10 to accommodate more components or circuits without increasing the size of the box body 10. The inclined support portion 150 also helps to improve the heat dissipation performance inside the box body 10, and can form a certain air flow channel to help circulate the heat dissipation air, thereby reducing the temperature of internal components and improving the reliability of the equipment.

[0076] It can be understood that multiple support parts 150 inclined along the direction away from the inner bottom wall 110 of the box body 10 and toward the boss direction can provide support for the box body 10 and its internal components, guide assembly, increase structural stability, optimize space utilization and improve heat dissipation performance.

[0077] In some embodiments, Figure 1 and Figure 2 As shown, the inner wall of the box body 10 is provided with a first heat dissipation rib 171 protruding from the accommodating cavity 30 , and the outer wall of the box body 10 is provided with a protruding second heat dissipation rib 172 .

[0078] The first heat dissipation rib 171 is located on the inner wall of the box body 10 and protrudes from the accommodating cavity 30, which can effectively increase the surface area of ​​the inner wall of the box body 10 and increase the contact area between the inner wall and the potting glue, thereby significantly increasing the heat dissipation area of ​​the inner wall of the box body 10, more effectively dissipating and conducting the internal heat to the outer wall of the box body 10, improving the overall heat dissipation efficiency, and effectively improving the mechanical strength of the inner wall of the box body 10.

[0079] The second heat dissipation rib 172 is located on the outer wall of the box body 10 and is designed to be protruding. Similar to the first heat dissipation rib 171, the second heat dissipation rib 172 increases the contact area between the outer wall of the box body 10 and the surrounding air, thereby more effectively removing heat through natural convection or forced air cooling, etc., which helps to dissipate heat to the surrounding environment faster and optimize the heat dissipation effect. At the same time, the protrusion of the second heat dissipation rib 172 can avoid heat accumulation, keep internal components running at a lower temperature, and improve the stability and reliability of the equipment.

[0080] It can be understood that the combined design of the first heat dissipation rib 171 and the second heat dissipation rib 172 increases the heat dissipation area on both the inner and outer sides of the box body 10, and improves the heat dissipation efficiency in different ways, which can effectively reduce the internal temperature of the box body 10, ensure the normal operation of internal components, and extend the service life of the equipment.

[0081] In some embodiments, Figure 1 and Figure 2 As shown, the first heat dissipation rib 171 extends from the inner bottom wall 110 of the box body 10 toward the open end and is spaced apart from the open end;

[0082] The second heat dissipation rib 172 extends from one end to the other end of the box body 10 in the opening direction.

[0083] The first heat dissipation rib 171 extends from the inner bottom wall 110 of the box body 10 to the open end to a distance of 0.5 mm from the open end. It can be a triangle, square, rectangle, semicircle or other structure. Taking the square as an example, its long dimension is 0.5-2 mm, and other shapes and structures cannot exceed this dimension. The distance between adjacent first heat dissipation ribs 171 is 1-5 mm, and a certain distance is maintained from the open end.

[0084] The first heat dissipation rib 171 extends upward from the inner bottom wall 110 , which helps to guide the heat to flow upward, avoid heat accumulation on the inner bottom wall 110 of the box body 10 , improve heat dissipation efficiency, and also enhance the structural strength inside the box body 10 and improve the overall stability of the box body 10 .

[0085] The outer wall of the box body 10 is thickened by 0.5-2mm. The second heat dissipation rib 172 extends from the inner bottom wall 110 of the box body 10 to the top. Similar to the first heat dissipation rib 171, it can be a triangular, square, rectangular, semicircular or other structure. Taking the square as an example, its long dimension is 1-10mm, and other shapes and structures cannot exceed this dimension. The distance between adjacent second heat dissipation ribs 172 is 1-5mm.

[0086] The second heat dissipation rib 172 extends from one end of the opening direction of the box body 10 to the other end, covering a larger area of ​​the outer wall of the box body 10, significantly increasing the heat dissipation area, helping to quickly dissipate heat to the surrounding environment, and at the same time helping to more effectively remove heat through natural convection or forced air cooling.

[0087] It can be understood that the first heat dissipation rib 171 and the second heat dissipation rib 172 are respectively arranged on the inner and outer sides of the box body 10, both of which can increase the heat dissipation area and improve the heat dissipation efficiency in different ways. The first heat dissipation rib 171 optimizes the heat dissipation effect by guiding the heat flow and enhancing the structural strength, while the second heat dissipation rib 172 improves the overall performance of the box body 10 by improving the heat dissipation effect. The heat dissipation structure composed of the first heat dissipation rib 171 and the second heat dissipation rib 172 can effectively reduce the internal temperature of the box body 10, ensure the normal operation of the internal components, and extend the service life of the equipment.

[0088] In some embodiments, Figure 1 and Figure 2 As shown, there are multiple first heat dissipation ribs 171, and the multiple first heat dissipation ribs 171 are arranged at intervals;

[0089] There are multiple second heat dissipation ribs 172 , and the multiple second heat dissipation ribs 172 are arranged at intervals.

[0090] In the technical solution of the present application, multiple first heat dissipation ribs 171 are arranged at intervals to form an array layout, which greatly increases the heat dissipation area of ​​the inner wall of the box body 10, so that heat can be more effectively conducted from the inside to the outer wall. The multiple first heat dissipation ribs 171 arranged at intervals can also ensure the uniform distribution of heat inside the box body 10, avoid local overheating, and improve the overall heat dissipation efficiency. While increasing the heat dissipation area, it also enhances the structural strength of the box body 10 and improves the stability and durability of the box body 10.

[0091] The distance between two adjacent first heat dissipation ribs 171 on the same wall is L1, which satisfies: 1mm≤L1≤5mm. L1 within an appropriate range can ensure that the number and distribution of the first heat dissipation ribs 171 can ensure sufficient heat dissipation area, thereby effectively conducting heat from the inside of the box body 10 to the outside. The first heat dissipation ribs 171 are not only used for heat dissipation, but also can support and stabilize the structure of the box body 10. When L1 is within an appropriate range, the first heat dissipation ribs 171 can provide sufficient support while avoiding material waste and weight increase caused by excessive density.

[0092] The plurality of second heat dissipation ribs 172 are also spaced apart to form a heat dissipation network on the outer wall of the box body 10, which significantly increases the heat dissipation area of ​​the outer wall of the box body 10, allowing heat to be dissipated to the surrounding environment more quickly. The plurality of second heat dissipation ribs 172 spaced apart also help to form an air flow channel, which can more effectively remove heat through natural convection or forced air cooling.

[0093] The distance between two adjacent second heat dissipation ribs 172 on the same wall is L2, satisfying: 1mm≤L2≤5mm. L2 within an appropriate range can allow air to flow between the second heat dissipation ribs 172 to form convection, thereby helping to take away heat. At the same time, the spacing range of 1mm to 5mm is feasible in manufacturing. It will not increase the processing difficulty due to a small spacing, nor will it affect the heat dissipation effect due to a large spacing. It can control the manufacturing cost while ensuring the heat dissipation effect and structural strength.

[0094] It can be understood that the first heat dissipation ribs 171 and the second heat dissipation ribs 172, which are arranged at multiple intervals and within an appropriate range, construct an efficient heat dissipation network on both the inside and outside of the box body 10, which can not only increase the heat dissipation area and optimize the heat distribution, but also improve the structural strength of the box body 10. At the same time, through the coordinated heat dissipation method between the inside and the outside, the internal temperature of the box body 10 can be significantly reduced, the normal operation of the internal components can be ensured, and the service life of the equipment can be extended.

[0095] The embodiments of the present application are described in detail below.

[0096] The photovoltaic junction box 1 includes: a box body 10, a diode module and a base 20. The box body 10 forms a accommodating cavity 30 with one end open. The inner bottom wall 110 of the box body 10 is provided with a first boss 121 and a second boss 122 spaced apart, an exhaust hole 130 provided between the first boss 121 and the second boss 122, a support portion 150 surrounding the boss, and a positioning column 160.

[0097] The first boss 121 and the second boss 122 are inclined toward each other's sides and are inclined in directions away from each other along the direction away from the inner bottom wall 110 of the box body 10. A limiting flange 123 is provided on the side of the first boss 121 away from the second boss 122, and the limiting flange 123 protrudes from the top surface of the first boss 121.

[0098] There are multiple support parts 150 surrounding the boss, which protrude from the inner bottom wall 110 of the box body 10 and are inclined in the direction away from the inner bottom wall 110 of the box body 10 toward the boss. The distance from the top surface of the support part 150 to the inner bottom wall 110 of the box body 10 is greater than the distance from the top surface of the boss to the inner bottom wall 110 of the box body 10. The positioning column 160 is installed on the inner bottom wall 110 of the box body 10, and the distance from the top surface of the positioning column 160 to the inner bottom wall 110 of the box body 10 is greater than the distance from the top surface of the support part 150 to the inner bottom wall 110 of the box body 10.

[0099] The diode module is installed in the accommodating cavity 30 and supported by the first boss 121 and the second boss 122. The connecting row of the diode module is supported by the supporting portion 150. The diode module is spaced apart from the inner bottom wall 110 of the box body 10. The exhaust hole 130 faces the diode module. The accommodating cavity 30 is filled with potting glue that wraps the diode module. The base 20 is installed at the open end of the box body 10.

[0100] The inner wall of the box body 10 is provided with a first heat dissipation rib 171 protruding from the accommodating cavity 30, and the outer wall of the box body 10 is provided with a protruding second heat dissipation rib 172. Multiple first heat dissipation ribs 171 extend from the inner bottom wall 110 of the box body 10 to the open end, and are spaced apart from the open end. The multiple first heat dissipation ribs 171 are spaced apart, and the distance between two adjacent first heat dissipation ribs 171 on the same wall surface is L1, satisfying: 1mm≤L1≤5mm. Multiple second heat dissipation ribs 172 extend from one end to the other end in the open direction of the box body 10. The multiple second heat dissipation ribs 172 are spaced apart, and the distance between two adjacent second heat dissipation ribs 172 on the same wall surface is L2, satisfying: 1mm≤L2≤5mm.

[0101] The diode module is installed in the photovoltaic junction box 1. After assembly and installation, the photovoltaic junction box 1 is filled with potting glue for insulation and sealing. Through the synergistic effect of the box body 10, the diode module, the potting glue and the base 20, the protection and electrical connection functions of the diode module can be achieved, the structure of the photovoltaic junction box 1 can be optimized, the heat dissipation capacity of the photovoltaic junction box 1 can be improved, and the temperature of the diode module during operation can be reduced, thereby improving the safety and reliability of the diode module. At the same time, when the operating temperature of the diode module is close, a diode module with a lower configuration can be used, thereby effectively reducing costs.

[0102] The embodiment of the present application further provides a photovoltaic assembly, which may include: a laminate and a photovoltaic junction box 1 , wherein the laminate is electrically connected to the photovoltaic junction box 1 .

[0103] In the technical solution of the present application, the photovoltaic module is composed of a laminate, a frame, and a photovoltaic junction box 1, which is used to convert solar energy into electrical energy, wherein the photovoltaic junction box 1 is used to connect the laminate and the cable so as to transmit the generated electrical energy to the power grid or the load, and the photovoltaic junction box 1 is equipped with a diode module to prevent the photovoltaic module from generating reverse current at night and damaging the system.

[0104] It can be understood that the laminate of the photovoltaic module and the photovoltaic junction box 1 are electrically connected to achieve energy conversion and effective transmission of electrical energy.

[0105] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0106] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0107] In the description of this application, "first feature" or "second feature" may include one or more of the features.

[0108] In the description of the present application, “plurality” means two or more.

[0109] In the description of the present application, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0110] In the description of the present application, “above”, “over” and “above” a first feature to a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0111] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0112] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A photovoltaic junction box, characterized in that: include: A box body, wherein the box body forms a receiving cavity with one end open, and the inner bottom wall of the box body is provided with a boss and an exhaust hole; A diode module, the diode module is installed in the accommodating cavity and supported on the boss, the diode module is spaced apart from the inner bottom wall of the box body, the exhaust hole faces the diode module, and the accommodating cavity is filled with a potting glue that wraps the diode module; A base is mounted on the open end of the box body.

2. The photovoltaic junction box according to claim 1, characterized in that: The boss includes a first boss and a second boss that are spaced apart from each other, and the exhaust hole is disposed between the first boss and the second boss.

3. The photovoltaic junction box according to claim 2, characterized in that: The first boss and the second boss are arranged to be inclined toward each other's side surfaces, and are inclined toward directions away from each other along a direction away from the inner bottom wall of the box body.

4. The photovoltaic junction box according to claim 2, characterized in that: A limiting flange is provided on a side of the first boss facing away from the second boss, and the limiting flange protrudes from the top surface of the first boss.

5. The photovoltaic junction box according to claim 1, characterized in that: The inner bottom wall of the box body is provided with a supporting portion surrounding the boss, the supporting portion protrudes from the inner bottom wall of the box body, the distance from the top surface of the supporting portion to the inner bottom wall of the box body is greater than the distance from the top surface of the boss to the inner bottom wall of the box body, and the connection row of the diode module is supported by the supporting portion.

6. The photovoltaic junction box according to claim 5, characterized in that: The supporting parts are multiple and are inclined from the direction away from the inner bottom wall of the box body toward the direction close to the boss.

7. The photovoltaic junction box according to any one of claims 1 to 6, characterized in that: The inner wall of the box body is provided with a first heat dissipation rib protruding from the accommodating cavity, and the outer wall of the box body is provided with a protruding second heat dissipation rib.

8. The photovoltaic junction box according to claim 7, characterized in that: The first heat dissipation rib extends from the inner bottom wall of the box body toward the open end and is spaced apart from the open end; and / or, The second heat dissipation rib extends from one end to the other end of the box body in the opening direction.

9. The photovoltaic junction box according to claim 7, characterized in that: There are a plurality of first heat dissipation ribs, and the plurality of first heat dissipation ribs are arranged at intervals; and / or, There are a plurality of second heat dissipation ribs, and the plurality of second heat dissipation ribs are arranged at intervals.

10. A photovoltaic module, characterized in that: include: Laminate; The photovoltaic junction box according to any one of claims 1 to 9, wherein the laminate is electrically connected to the photovoltaic junction box.

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