Photovoltaic junction box and photovoltaic module

Abstract

The photovoltaic junction box comprises a box body, the box body is internally provided with a containing cavity with an opening in the top, one end of the box body is provided with a cable channel which is used for a cable to penetrate through and is communicated with the containing cavity, and the two sides of the upper end of the box body are each provided with a first clamping part; the box cover is used for covering the top of the box body to seal the containing cavity, a first groove body used for being matched with the box body is formed in the box cover, and second clamping parts are arranged on the two side walls of the first groove body correspondingly; the sealing ring surrounds the inner side wall of the first groove body and is arranged in the first groove body, first side wings extending downwards are arranged on the two sides of the sealing ring correspondingly, and a third clamping part used for being connected with the first clamping part is arranged on the inner side of each first side wing. The outer side of each first side wing is provided with a fourth clamping part used for being connected with the corresponding second clamping part. The photovoltaic junction box is simple in structure and convenient to operate, the water blocking performance is improved, and the production cost is reduced.

Description

Technical Field

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

[0002] With the global pursuit of clean energy, the photovoltaic (PV) power generation industry is booming. However, as a key component of PV modules, the water-blocking performance of PV junction boxes has always been a crucial factor affecting the reliability and stability of PV power generation systems. Currently, PV modules are typically exposed to various harsh outdoor environments, making moisture intrusion a common problem. Traditional PV junction boxes are insufficient in their waterproofing capabilities, easily leading to electrical faults, metal corrosion, and decreased insulation performance.

[0003] To improve the waterproof performance of photovoltaic junction boxes, various waterproof (or water-blocking) junction boxes have emerged, mainly in the following aspects: Regarding sealing materials, high-performance rubber and special plastics are used, utilizing their excellent elasticity and weather resistance to effectively fill gaps and prevent moisture penetration; In terms of structure, waterproof grooves and multiple sealing structures are added to improve the overall waterproof effect; Regarding surface treatment, the outer shell of the photovoltaic junction box is treated to improve its hydrophobicity and reduce water adhesion; Regarding manufacturing processes, high-precision injection molding and welding technologies are used to ensure a tight fit between components, minimizing possible water ingress channels and improving water-blocking performance.

[0004] However, existing water-blocking photovoltaic junction boxes often suffer from problems such as insufficient sealing, complex structure, inconvenient operation, and high production costs. In addition, when encountering extreme weather conditions such as strong winds, high waves, and heavy rain, the cables in the photovoltaic junction box are prone to loosening, allowing moisture to seep into the box and damage electrical components, resulting in low safety and reliability. Utility Model Content

[0005] The purpose of this application is to provide a photovoltaic junction box and photovoltaic module, which has a simple structure, is easy to operate, has good sealing performance, improves the water resistance of the junction box, and reduces production costs.

[0006] To solve at least one of the above-mentioned technical problems, the technical solution of this application is as follows:

[0007] According to a first aspect of this application, a photovoltaic junction box is provided, comprising: a box body, wherein a receiving cavity with a top opening is provided inside the box body, a cable channel for cables to pass through and communicating with the receiving cavity is provided at one end of the box body, and a first engaging portion is provided on each of the upper two sides of the box body; a box cover, wherein the box cover is used to cover the top of the box body to close the receiving cavity, and a first groove is provided on the box cover for cooperating with the top of the box body, and a second engaging portion is provided on each of the two side walls of the first groove; and a sealing ring, wherein the sealing ring is disposed in the first groove surrounding the inner side wall of the first groove, and a first wing extending downward is provided on each side of the sealing ring, a third engaging portion for connecting with the first engaging portion is provided on the inner side of each first wing, and a fourth engaging portion for connecting with the second engaging portion is provided on the outer side of each first wing.

[0008] In one possible implementation of the first aspect described above, the lid is provided with downwardly extending second side wings on both sides, and each second engaging part is located on its respective second side wing.

[0009] In one possible implementation of the first aspect described above, the sealing ring is provided with second grooves located at both ends of each first wing, and the opening of each second groove faces downward and penetrates the side wall of the lid in a horizontal direction.

[0010] In one possible implementation of the first aspect mentioned above, the outer side of the lid is provided with a rim that wraps around it horizontally, and the rim is curved at all the corners in the horizontal direction.

[0011] In one possible implementation of the first aspect described above, the photovoltaic junction box of this application further includes: a wire clamping block, wherein a notch for accommodating the wire clamping block is provided at the bottom of the cable channel.

[0012] In one possible implementation of the first aspect described above, a raised cross-shaped pressure rib is provided on the top of the inner wall of the cable channel. The cross-shaped pressure rib corresponds to the pressure block. The cross-shaped pressure rib includes a first part and a second part that are perpendicular to each other. The first part is aligned with the axial direction of the cable channel, and the second part is an arc shape that is coaxial with the cable channel.

[0013] In one possible implementation of the first aspect mentioned above, two raised first pressure ribs are provided on the inner wall of the cable channel. The two first pressure ribs are arc-shaped and coaxial with the cable channel. A cross-shaped pressure rib is located between the two first pressure ribs. Two second pressure ribs protruding towards the cable channel are provided on the end of the pressure block facing the cable channel. The two second pressure ribs are arc-shaped and coaxial with the cable channel. The first pressure ribs and the second pressure ribs correspond one-to-one and form a ring respectively.

[0014] In one possible implementation of the first aspect described above, the bottom of the wire clamping block is provided with an injection hole for communicating with the cable channel, the injection hole being located between two second wire clamping ribs.

[0015] In one possible implementation of the first aspect above, a cable fixing guard extending outward is provided on one end of the housing near the cable channel. The cable fixing guard is provided with a slot for the cable to pass through and the slot is open downward. The slot is coaxial with and connected to the cable channel.

[0016] In one possible implementation of the first aspect mentioned above, a raised third pressure rib is provided on the inner wall of the slot.

[0017] In one possible implementation of the first aspect described above, there are multiple third pressure ribs, each of which extends along the axial direction of the groove, and the multiple third pressure ribs are evenly distributed along the circumferential direction of the groove.

[0018] According to a second aspect of this application, a photovoltaic module is provided, including the aforementioned photovoltaic junction box.

[0019] The above-mentioned technical solution of this application has at least one of the following beneficial effects:

[0020] The photovoltaic junction box according to this application includes a box body, a cover, and a sealing ring. The sealing ring is disposed within the first groove, surrounding the inner wall of the first groove on the cover. First engaging portions are respectively provided on both sides of the upper end of the box body, and second engaging portions are respectively provided on both side walls of the first groove. First side wings extending downwards are respectively provided on both sides of the sealing ring. A third engaging portion for connecting with the first engaging portion is provided on the inner side of each first side wing, and a fourth engaging portion for connecting with the second engaging portion is provided on the outer side of each first side wing. When the cover is closed on top of the box body, the cover achieves a sealed connection with the box body through the sealing ring. Therefore, the photovoltaic junction box of this application has a simple and stable structure, is easy to operate, has good sealing performance, better blocks the water vapor penetration path at the cover location, improves the water resistance performance of the junction box, has high safety and reliability, a long service life, ensures better operation of the photovoltaic modules, and reduces production costs.

[0021] Furthermore, the photovoltaic module according to this application, using the aforementioned photovoltaic junction box, has a simple structure, is easy to operate, has good sealing performance, better blocks the water vapor penetration path at the box cover position, improves the water resistance performance of the junction box, has high safety and reliability, long service life, ensures better operation of the photovoltaic module, and reduces production costs.

[0022] In addition, unless otherwise specified in the technical solution of this application, the technical solution can be implemented by conventional means in the field. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of a photovoltaic junction box according to one embodiment of this application;

[0025] Figure 2 This is a cross-sectional view of a photovoltaic junction box according to one embodiment of this application;

[0026] Figure 3 This is a schematic diagram of an inverted box structure according to one embodiment of this application;

[0027] Figure 4 This is a schematic diagram of an inverted box lid according to one embodiment of this application;

[0028] Figure 5 This is a schematic diagram of the structure of a sealing ring according to one embodiment of this application;

[0029] Figure 6 This is a schematic diagram of the pressure block according to one embodiment of this application.

[0030] Explanation of the labels in the attached drawings:

[0031] Box body 100; receiving cavity 110; cable channel 120; first locking part 130; cross-shaped wire clamping rib 140; first wire clamping rib 150;

[0032] Box lid 200; first groove 210; second locking part 220; second side wing 230; edge binding 240;

[0033] Sealing ring 300; First side wing 310; Third engaging part 320; Fourth engaging part 330; Second groove 340;

[0034] Wire pressing block 400; Second wire pressing rib 410; Glue injection hole 420;

[0035] Cable fixing sheath 500; Card slot 510; Third wire clamping rib 520;

[0036] Cable 600. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only some, not all, of the embodiments of this application, and are used merely to explain this application and are not intended to limit it. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0038] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," "outer," "both ends," "both sides," "bottom," and "top," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the elements 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 this application. In addition, the terms "first," "second," "upper-level," "lower-level," "main," and "secondary," etc., are used for descriptive purposes only and can be simply used to more clearly distinguish different components, and should not be construed as indicating or implying relative importance.

[0039] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] See Figures 1-5 As shown, a photovoltaic junction box according to an embodiment of this application is schematically illustrated, which may include: a box body 100, a box cover 200, and a sealing ring 300.

[0041] The box body 100 has a top-opening receiving cavity 110. One end of the box body 100 has a cable channel 120 for the cable 600 to pass through and communicate with the receiving cavity 110. The upper end of the box body 100 has first engaging portions 130 on both sides. The box cover 200 is used to cover the top of the box body 100 to close the receiving cavity 110. The box cover 200 has a first groove 210 for cooperating with the top of the box body 100. The two side walls of the first groove 210 have second engaging portions 220. The sealing ring 300 surrounds the inner side wall of the first groove 210 and is disposed in the first groove 210. The two sides of the sealing ring 300 have downwardly extending first side wings 310. The inner side of each first side wing 310 has a third engaging portion 320 for connecting with the first engaging portion 130. The outer side of each first side wing 310 has a fourth engaging portion 330 for connecting with the second engaging portion 220.

[0042] The inner side of the first side wing 310 is the side facing the center of the sealing ring 300, and the outer side of the first side wing 310 is the side away from the center of the sealing ring 300. The box body 100 can be made of a high-strength, weather-resistant plastic material. The box body 100 and the box lid 200 can be made of the same material. The sealing ring 300 can be made of a highly elastic, high-temperature resistant, and aging-resistant rubber material or silicone material. The first engaging part 130 and the third engaging part 320 form a snap-fit ​​structure. One of the first engaging part 130 and the third engaging part 320 can be a groove structure and the other can be a protruding structure, or both the first engaging part 130 and the third engaging part 320 can be protruding structures. Similarly, the second engaging part 220 and the fourth engaging part 330 also form a snap-fit ​​structure, which will not be described in detail here.

[0043] When the cable 600 is connected to the photovoltaic junction box of this application, one end of the cable 600 is first inserted into the receiving cavity 110 of the box 100 through the cable channel 120 on the box body 100. Then, the end of the cable 600 is electrically connected to the circuit component in the receiving cavity 110. A sealing ring 300 is provided in the first groove 210 of the cover 200. The sealing ring 300 is snapped to the second snapping part 220 on the two side walls of the first groove 210 through the fourth snapping part 330 on the outer side of the two first side wings 310. Then, the cover 200 is closed on the top of the box body 100. The sealing ring 300 is snapped to the first snapping part 130 on both sides of the upper end of the box body 100 through the third snapping part 320 on the inner side of the two first side wings 310. The sealing ring 300 is located between the box body 100 and the cover 200 and is squeezed, so that the cover 200 achieves a sealed connection with the box body 100 through the sealing ring 300.

[0044] Therefore, the photovoltaic junction box of this application has a simple and stable structure, is easy to operate, has good sealing performance, better blocks the water vapor penetration path at position 200 of the box cover, improves the water resistance performance of the junction box, has high safety and reliability, long service life, ensures better operation of photovoltaic modules, and reduces production costs.

[0045] In some embodiments, reference Figures 4-5 As shown, the lid 200 has downwardly extending second side wings 230 on both sides, and each second engaging portion 220 is located on its corresponding second side wing 230. That is, the first side wing 310 corresponds one-to-one with the second side wing 230, and each first side wing 310 is snapped together with its corresponding second side wing 230 via the second engaging portion 220 and the fourth engaging portion 330. This results in a simpler structure, reduced volume of the lid 200, more convenient and faster operation, and lower costs.

[0046] In some embodiments, reference Figure 5 As shown, the sealing ring 300 is provided with second grooves 340 located at both ends of each first side wing 310. The opening of each second groove 340 faces downward and penetrates the side wall of the lid 200 in a horizontal direction. The second grooves 340 can be V-shaped grooves. Therefore, by providing second grooves 340 at both ends of each first side wing 310, the first side wing 310 is secured to both the lid 200 and the box body 100 through a snap-fit ​​connection.

[0047] In some embodiments, reference Figure 4 As shown, the outer side of the lid 200 is provided with a horizontally surrounding edging 240. The corners of the edging 240 are all curved. For example, if the lid 200 is roughly rectangular, the four corners of the edging 240 are smoothly rounded. The edging 240 can also cover the outer sides of the two second side wings 230. This not only facilitates the operator in applying force when opening the lid 200, allowing for quick disassembly for later maintenance and repair, but also reduces moisture accumulation at the edges of the lid 200, preventing rainwater from seeping into the box body 100 along the edges of the lid 200, and enhancing the overall structural strength of the lid 200. Furthermore, the edging 240 and the lid 200 can be integrally molded using methods such as injection molding, resulting in a more stable structure.

[0048] In some embodiments, reference Figure 2As shown, the photovoltaic junction box of this application also includes a wire clamping block 400. The bottom of the cable channel 120 has a notch (not shown) for accommodating the wire clamping block 400. The wire clamping block 400 can be connected to the box body 100 by ultrasonic welding or other suitable methods. The wire clamping block 400 can be made of the same plastic material as the box body 100 and the box cover 200. That is, after one end of the cable 600 passes through the cable channel 120 on the box body 100 and is electrically connected to the circuit components in the receiving cavity 110 of the box body 100, the wire clamping block 400 is then connected to the notch. The wire clamping block 400 clamps the cable 600 in the cable channel 120, thereby preventing the cable 600 from loosening or shifting. This avoids the possibility of moisture seeping into the interior of the junction box and damaging electrical components due to the loosening of the cable 600, resulting in high safety and reliability, and effectively coping with extreme weather conditions such as strong winds, high waves, and heavy rain.

[0049] In some embodiments, reference Figures 2-3 As shown, a raised cross-shaped wire clamping rib 140 is provided on the top of the inner wall of the cable channel 120, corresponding to the wire clamping block 400. The cross-shaped wire clamping rib 140 can be a single cross, double cross, or multiple crosses, and can be integrally formed with the box body 100. For example, the cross-shaped wire clamping rib 140 is a double cross, comprising two first parts and two second parts. The two first parts are arranged parallel to each other and aligned with the axis of the cable channel 120. The two second parts are arranged parallel to each other and can be arc-shaped coaxial with the cable channel 120. Both first parts intersect perpendicularly with the two second parts. Therefore, by setting a cross-shaped wire clamping rib 140 on the top of the inner wall of the cable channel 120, not only is the structural strength of the inner wall of the cable channel 120 enhanced, but when the cable 600 is pulled by external force, the cross-shaped wire clamping rib 140 can also disperse and bear part of the tension, restrict the movement of the cable 600 in the horizontal and vertical directions, further reduce the possibility of cable 600 displacement, and prevent the cable 600 from breaking due to wind, waves, rain and other factors, and prevent the inside of the box 100 from getting damp.

[0050] In some embodiments, reference Figures 2-3As shown in Figure 6, two raised first pressure ribs 150 are provided on the inner wall of the cable channel 120. The two first pressure ribs 150 are arc-shaped and coaxial with the cable channel 120. A cross-shaped pressure rib 140 is located between the two first pressure ribs 150. Two second pressure ribs 410 are provided on the end of the pressure block 400 facing the cable channel 120. The two second pressure ribs 410 are arc-shaped and coaxial with the cable channel 120. The first pressure ribs 150 and the second pressure ribs 410 correspond one-to-one and form rings respectively. This not only enhances the structural strength of the inner wall of the cable channel 120 and the pressure block 400, but also improves the pressure effect, which can better prevent the cable 600 from loosening and shifting. The ring formation of the first pressure ribs 150 and their corresponding second pressure ribs 410 also improves the sealing performance and can better cope with extreme weather conditions such as strong winds, high waves, and heavy rain. In addition, the thickness of each wire clamp should be sufficient to enhance structural strength without affecting the installation and wiring of cable 600.

[0051] Further, refer to Figure 2 , 6 As shown, the bottom of the wire clamping block 400 is provided with an injection hole 420 for communicating with the cable channel 120. The injection hole 420 is located between two second wire clamping ribs 410. When the cable 600 passes through the cable channel 120 and is electrically connected to the circuit components inside the box 100, and the wire clamping block 400 is connected to the box 100, the first wire clamping rib 150 and the second wire clamping rib 410 correspond one-to-one and form a ring-shaped wire clamping structure. The two ring-shaped wire clamping structures form a cavity between the inner wall of the cable channel 120 and the outer side of the cable 600. Glue is injected through the injection hole 420 at the bottom of the wire clamping block 400. For example, a canned glue with good flowability and sealing properties can be used to fill the cavity and the injection hole 420 with potting glue, thereby forming a strong waterproof barrier that effectively prevents moisture from penetrating from the port of the cable 600 into the receiving cavity 110 of the box 100. In addition, in high humidity environments, the potting process and the sealing ring 300 inside the cover 200 can effectively prevent moisture from entering the receiving cavity 110, ensuring the dryness of the junction box and the normal operation of the circuit.

[0052] In some embodiments, reference Figures 1-3 As shown, a cable fixing guard 500 extending outward is provided at one end of the housing 100 near the cable channel 120. The cable fixing guard 500 has a downward-facing slot 510 for the cable 600 to pass through. The slot 510 is coaxial with and communicates with the cable channel 120. The cable 600 passes through the slot 510 and the cable channel 120 in sequence and is inserted into the receiving cavity 110. The cable fixing guard 500 can be integrally formed with the housing 100. Thus, the slot 510 of the cable fixing guard 500 further reinforces the cable 600, further improving the fixing effect of the cable 600 and better preventing the cable 600 from loosening and shifting.

[0053] Furthermore, the inner wall of the slot 510 is provided with raised third pressure ribs 520. Multiple third pressure ribs 520 can be provided, each extending axially along the slot 510, and the multiple third pressure ribs 520 are evenly distributed along the circumference of the slot 510. Therefore, when the cable 600 is inserted into the slot 510, the cable 600 is subjected to uniform and moderate compressive force around its perimeter, effectively restricting the movement of the cable 600 in both horizontal and vertical directions. In addition, the inner wall of the slot 510 can also be treated with a rough texture or other methods to increase the friction between the inner wall of the slot 510 and the outer sheath of the cable 600, further improving the fixing effect of the cable 600.

[0054] In summary, the photovoltaic junction box of this application, on the one hand, has a sealing ring 300 on the cover 200 that is sealed to the box body 100, forming the first line of defense. After the cable 600 passes through the slot 510 and the cable channel 120 in sequence and is inserted into the receiving cavity 110 and electrically connected to the corresponding circuit components, the wire clamping block 400 is connected to the box body 100, and the corresponding cavity in the cable channel 120 is filled with glue through the glue injection hole 420 at the bottom of the wire clamping block 400, so that the cavity and the glue injection hole 420 are filled. The sealant is fully applied and cured to form a second line of defense. The edging 240 of the cover 200 and the sealing ring 300 prevent rainwater from seeping into the box 100 along the edge of the cover 200, thus effectively preventing moisture from penetrating into the receiving cavity 110. This provides more comprehensive waterproof protection for the junction box. Even in high humidity environments, it can effectively prevent moisture from entering the receiving cavity 110, ensuring the dryness of the junction box interior and the normal operation of the circuit. Moreover, the edging 240 of the cover 200 covers the second... The side wing 230 also facilitates easy disassembly of the cover 200 by operators for maintenance and repair. On the other hand, the cross-shaped wire clamping ribs 140 and 150 on the inner wall of the cable channel 120, the second wire clamping rib 410 on the wire clamping block 400, and the third wire clamping rib 520 in the slot 510 of the cable fixing body 500 work together to not only firmly fix the cable 600, reducing the loosening and displacement of the cable 600 due to external factors such as wind, waves, and rain, effectively preventing the cable 600 from breaking due to excessive swinging, reducing the incidence of line faults, but also preventing the gap caused by the displacement of the cable 600 from causing moisture inside the junction box 100. This allows the junction box to maintain good performance in extreme environments such as strong winds, high waves, and heavy rain, improving the reliability and stability of the photovoltaic system under harsh conditions, reducing maintenance costs, improving the efficiency and reliability of photovoltaic power generation, ensuring the stable power supply operation of the photovoltaic system, and also enhancing the structural strength of the junction box.

[0055] A photovoltaic module is also provided according to an embodiment of this application, including the aforementioned photovoltaic junction box. The photovoltaic module of this application also includes a photovoltaic frame, a photovoltaic laminate, and other mechanisms. The photovoltaic laminate is installed in the photovoltaic frame, and the photovoltaic junction box can be installed in the photovoltaic frame or on the photovoltaic laminate. These mechanisms can adopt corresponding mechanisms of existing photovoltaic modules, which will not be described in detail here.

[0056] Therefore, the photovoltaic module of this application uses the aforementioned photovoltaic junction box. The sealing ring 300 on the box cover 200 is sealed to the box body 100, forming the first line of defense. The wire pressing block 400 is connected to the box body 100 and presses the cable 600 in the cable channel 120. Glue is injected into the corresponding cavity in the cable channel 120 through the glue injection hole 420 at the bottom of the wire pressing block 400 and fully cured, forming the second line of defense. The edge 240 of the box cover 200 and the sealing ring 300 can prevent rainwater from seeping into the box body 100 along the edge of the box cover 200, thereby effectively preventing moisture from penetrating into the receiving cavity 110, providing more comprehensive waterproof protection for the junction box. Even in high humidity environments, it can effectively block moisture from entering the receiving cavity 110, ensuring the dryness of the junction box and the normal operation of the circuit. Moreover, the edge 240 of the box cover 200 also makes it easy for operators to easily disassemble the box cover 200 for maintenance and repair. On the one hand, the cross-shaped wire clamping ribs 140 and 150 on the inner wall of the cable channel 120, the second wire clamping rib 410 on the wire clamping block 400, and the third wire clamping rib 520 in the slot 510 of the cable fixing body 500 work together to not only firmly fix the cable 600, reducing the loosening and displacement of the cable 600 due to external wind, waves, rain and other factors, effectively preventing the cable 600 from breaking due to excessive swinging, reducing the incidence of line faults, but also avoiding the gap caused by the displacement of the cable 600 from causing moisture inside the junction box 100. This allows the junction box to maintain good performance in extreme environments such as strong winds, waves and rainstorms, improving the reliability and stability of the photovoltaic system under harsh conditions, reducing maintenance costs, improving the efficiency and reliability of photovoltaic power generation, ensuring the stable power supply operation of the photovoltaic system, and also enhancing the structural strength of the junction box.

[0057] Based on the various embodiments of this application described above, in the absence of explicit denial or conflict, the technical features of one embodiment may be advantageously combined with one or more other embodiments.

[0058] The above descriptions are merely some embodiments of this application, used only to illustrate the technical solutions of this application, and not to limit it. It should be understood that those skilled in the art can make improvements or substitutions based on the above descriptions without departing from the inventive concept of this application, and all such improvements and substitutions should fall within the protection scope of this application. In this case, all details can be replaced with equivalent elements, and materials, shapes, and sizes can also be arbitrary.

Claims

1. A photovoltaic junction box, characterized in that, include: The box body has a receiving cavity with a top opening inside, a cable channel for cables to pass through and communicating with the receiving cavity at one end of the box body, and first engaging parts are respectively provided on both sides of the upper end of the box body; A lid is provided on the top of the box body to close the receiving cavity. The lid has a first groove for engaging with the top of the box body, and a second engaging part is provided on each of the two side walls of the first groove. A sealing ring is disposed within the first groove body, surrounding the inner side wall of the first groove body. The sealing ring has downwardly extending first side wings on both sides. The inner side of each first side wing has a third engagement portion for connecting with the first engagement portion, and the outer side of each first side wing has a fourth engagement portion for connecting with the second engagement portion.

2. The photovoltaic junction box according to claim 1, characterized in that, The lid has two downwardly extending second side wings on its two sides, and each second engaging part is located on its corresponding second side wing.

3. The photovoltaic junction box according to claim 1, characterized in that, The sealing ring is provided with second grooves located at both ends of each of the first side wings, and the opening of each second groove faces downward and penetrates the side wall of the box cover in a horizontal direction.

4. The photovoltaic junction box according to claim 3, characterized in that, The outer side of the box lid is provided with a rim that wraps around it horizontally, and the rim is curved at all the corners in the horizontal direction.

5. The photovoltaic junction box according to claim 1, characterized in that, Also includes: The cable channel has a notch at its bottom for accommodating the cable clamping block.

6. The photovoltaic junction box according to claim 5, characterized in that, The inner wall of the cable channel is provided with a raised cross-shaped pressure rib at the top. The cross-shaped pressure rib corresponds to the pressure block. The cross-shaped pressure rib includes a first part and a second part that are perpendicular to each other. The first part is consistent with the axial direction of the cable channel, and the second part is an arc shape that is coaxial with the cable channel.

7. The photovoltaic junction box according to claim 6, characterized in that, The inner wall of the cable channel is provided with two raised first pressure ribs, the two first pressure ribs being arc-shaped and coaxial with the cable channel. The cross-shaped pressure rib is located between the two first pressure ribs. The end of the pressure block facing the cable channel is provided with two raised second pressure ribs, the two second pressure ribs being arc-shaped and coaxial with the cable channel. The first pressure ribs and the second pressure ribs correspond one-to-one and form a ring respectively. The bottom of the pressure block is provided with an injection hole for communicating with the cable channel, and the injection hole is located between the two second pressure ribs.

8. The photovoltaic junction box according to claim 1, characterized in that, The housing has a cable fixing guard extending outward at one end near the cable channel. The cable fixing guard has a slot for the cable to pass through with its opening facing downward. The slot is coaxial with and connected to the cable channel.

9. The photovoltaic junction box according to claim 8, characterized in that, The inner wall of the slot is provided with a raised third pressure rib; There are multiple third pressure ribs, each of which extends multiple times along the axial direction of the slot, and the multiple third pressure ribs are evenly distributed along the circumferential direction of the slot.

10. A photovoltaic module, characterized in that, The photovoltaic junction box includes any one of claims 1 to 9.

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