Self-connection type photovoltaic junction box and photovoltaic module

Abstract

The utility model discloses a self-connection type photovoltaic junction box and a photovoltaic module, the self-connection type photovoltaic junction box comprises a base, the two sides of the base in the length direction are provided with clamping parts extending upwards, and the base is provided with a bus bar lead-out port; the box cover is provided with a containing cavity with a downward opening; the diode module is arranged in the accommodating cavity, the diode module is provided with a metal plug bush and a wiring terminal, the wiring terminal is used for being connected with a corresponding cable, and one end of the accommodating cavity is provided with a channel for the cable to pass through; the metal connecting piece is arranged on the base, and the metal connecting piece is provided with a connecting groove used for being electrically connected with the bus bar and a metal contact pin used for being corresponding to the metal plug bush; wherein the two clamping parts are used for being connected with the two outer sides of the box cover in the length direction in a buckled mode, and meanwhile the metal inserting pins are inserted into the metal inserting sleeves for electric connection. The photovoltaic connector is simple, convenient and fast to disassemble, can realize self-connection, and can realize stable electric connection without depending on a traditional photovoltaic connector.

Description

Technical Field

[0001] This application relates to solar photovoltaic modules, specifically to a self-connecting photovoltaic junction box and photovoltaic module. Background Technology

[0002] Photovoltaic junction boxes are electrical transmission and protection devices for solar photovoltaic modules, and are an indispensable part of a photovoltaic system. Currently, existing photovoltaic junction boxes are mainly split-type junction boxes. The main problems with split-type junction boxes are: split-type junction boxes usually require traditional photovoltaic connectors to achieve electrical connection between photovoltaic modules. Connectors are not only expensive, but also prone to failure during long-term use, such as poor contact, wear, and corrosion, resulting in poor electrical connection stability, which affects the current transmission stability of the photovoltaic system and thus reduces the performance and reliability of the entire photovoltaic system; the junction box body is tightly bonded to the back panel of the photovoltaic module with sealant, making disassembly and separation difficult, thus consuming a lot of manpower and resources, and hindering later maintenance. The junction boxes are also not easy to classify and recycle after being scrapped, failing to meet the requirements of resource recycling and environmental protection; in addition, split-type junction boxes also have problems such as complex structure, inconvenient processing and manufacturing, and difficulty in packaging and transporting photovoltaic modules. Utility Model Content

[0003] The purpose of this application is to propose a self-connecting photovoltaic junction box and photovoltaic module, which is simple, convenient and quick to disassemble, and facilitates inspection, maintenance, replacement and recycling of the junction box after it is scrapped. It can achieve self-connection and achieve stable electrical connection without relying on traditional photovoltaic connectors. It simplifies the structure and facilitates the packaging, transportation and on-site assembly of photovoltaic modules. Ultimately, it improves the stability and service life of electrical connection while reducing costs and better meets the requirements of resource recycling and environmental protection.

[0004] To solve the above-mentioned technical problems, the technical solution of this application is as follows:

[0005] According to a first aspect of this application, a self-connecting photovoltaic junction box is provided for photovoltaic modules, comprising: a base, wherein upwardly extending snap-fit ​​portions are respectively provided on both sides of the base along its length, and a busbar outlet is provided on the base; a cover, wherein a downwardly opening receiving cavity is provided on the cover; a diode module disposed in the receiving cavity, wherein a metal sleeve and a terminal are provided on the diode module, the metal sleeve being vertically arranged, the terminal being used to connect to one end of a corresponding cable, and a channel for the cable to pass through being provided at one end of the receiving cavity; and a metal connector disposed on the base, wherein a connecting groove for electrical connection with the busbar and a metal pin corresponding to the metal sleeve are provided on the metal connector; wherein, the two snap-fit ​​portions are used to snap-fit ​​the two outer sides of the cover along its length to close the cover and the base and seal the receiving cavity, while the metal pin is inserted into the metal sleeve for electrical connection.

[0006] In one possible implementation of the first aspect described above, a metal spring is provided inside the metal socket for engaging with the metal pin.

[0007] In one possible implementation of the first aspect described above, each snap-fit ​​portion is provided with a first snap, and the two outer sides of the lid along its length are respectively provided with second snaps for engaging with the first snap.

[0008] In one possible implementation of the first aspect described above, horizontal extensions for connecting with the snap-fit ​​portion are provided on both sides of the base along its length, the snap-fit ​​portion and the horizontal extensions connected thereto form an L-shaped structure, and a first groove is provided on the cover for correspondingly engaging with each horizontal extension.

[0009] In one possible implementation of the first aspect described above, a plurality of first positioning holes are provided at both ends of the diode module along its length, and a plurality of first positioning posts corresponding one-to-one with the plurality of first positioning holes are provided at the top of the receiving cavity, with each first positioning post being arranged in a vertical direction.

[0010] In one possible implementation of the first aspect described above, the diode module has brackets extending upward at both ends along its length and cooperating with the top of the receiving cavity, with metal sleeves located below the corresponding brackets, and each bracket having a clearance interval for cooperating with the corresponding first positioning post.

[0011] In one possible implementation of the first aspect above, the diode module is encapsulated in a cavity with potting compound. One end of the cavity is provided with an overflow groove with the opening facing downwards. The end of the metal socket away from the opening of the cavity is closed. The overflow groove is used to prevent potting compound from entering the metal socket when the diode module is encapsulated in the cavity.

[0012] In one possible implementation of the first aspect described above, a cable reinforcement part extending outward is provided at one end of the cover along its length. The cable reinforcement part is provided with a cable groove with its opening facing downward and communicating with the receiving cavity. The opening of the cable groove is sealed by a pressure block, and a channel is formed between the pressure block and the cable groove. A support panel is provided on the base for cooperating with the bottom of the pressure block and the bottom of the cable reinforcement part.

[0013] In one possible implementation of the first aspect mentioned above, a wire pressing rib is provided inside the cable groove, and an arc-shaped groove for cooperating with the cable groove is provided at one end of the pressing block facing the cable groove, and an adhesive filling through hole is provided inside the arc-shaped groove.

[0014] In one possible implementation of the first aspect described above, the terminal block is located at the end of the diode module closer to the channel, and the glue overflow groove is located at the end of the receiving cavity away from the channel.

[0015] In one possible implementation of the first aspect described above, a boss is provided on the upper surface of the base, and a sealing ring is fitted on the outer side of the boss. The sealing ring is used to seal the inner wall of the receiving cavity when the cover and the base are closed. The metal connector and the manifold outlet are provided on the boss.

[0016] In one possible implementation of the first aspect described above, the metal connector includes a metal base plate, a connecting groove and a metal pin disposed on the metal base plate, the metal pin being perpendicular to the metal base plate.

[0017] In one possible implementation of the first aspect described above, a second groove is provided on the upper surface of the boss, and the busbar outlet and metal connector are provided on the bottom surface of the second groove.

[0018] In one possible implementation of the first aspect described above, a plurality of second positioning posts are provided on the bottom surface of the second tank, each second positioning post being arranged in a vertical direction. A plurality of second positioning holes corresponding one-to-one with the plurality of second positioning posts are provided on the metal base plate. A plurality of support platforms corresponding one-to-one with the second positioning posts are also provided on the bottom surface of the second tank. The outer diameter of the support platform is larger than the outer diameter of the second positioning post, and each second positioning post is set on its corresponding support platform.

[0019] According to a second aspect of this application, a photovoltaic module is provided, including the self-connecting photovoltaic junction box of the first aspect described above.

[0020] The above-mentioned technical solution of this application has the following beneficial effects:

[0021] The self-connecting photovoltaic junction box of this application includes a base and a cover. The base has upwardly extending snap-fit ​​parts on both sides along its length. The cover has a downward-facing receiving cavity. A diode module is placed in the receiving cavity to form a sub-assembly. The diode module is provided with a metal socket and a wiring terminal. A metal connector is placed on the base to form a sub-assembly. The metal connector is provided with a connecting groove and a metal pin. When the two snap-fit ​​parts of the base are connected to the two outer snap-fit ​​parts of the cover along the length direction, the cover and the base are closed and the receiving cavity of the cover is sealed. At the same time, the metal pin is inserted into the metal socket for electrical connection, realizing the self-connection of the diode module and the metal connector. When making electrical connection between two adjacent photovoltaic modules, the self-connecting photovoltaic junction box on one photovoltaic module is the positive terminal junction box and the self-connecting photovoltaic junction box on the other photovoltaic module is the negative terminal junction box. First, one end of the cable is electrically connected to the terminal of the diode module inside the cover of the positive terminal junction box, and the other end of the cable is electrically connected to the terminal of the diode module inside the cover of the negative terminal junction box, so that the two covers form an assembly. Then, the two covers are snap-fitted to the two bases of the positive and negative terminals one by one.

[0022] Therefore, the self-connecting photovoltaic junction box of this application connects the cover and the base via a snap-fit ​​mechanism, forming a sub-assembly between the metal connector and the base, and between the diode module and the cover. This allows for simple, convenient, and quick disassembly of the junction box, facilitating inspection, maintenance, replacement, and the classified recycling of the junction box after it is scrapped. Simultaneously, the metal pins of the metal connector and the metal sockets of the diode module can self-connect, resulting in a compact and robust structure that ensures stable and reliable electrical connections, significantly reducing the risk of photovoltaic system operation interruptions due to connection failures. Furthermore, the two covers of the positive and negative junction boxes between adjacent photovoltaic modules can be pre-assembled, achieving stable electrical connections without relying on traditional photovoltaic connectors. This simplifies the structure, facilitates the packaging, transportation, and on-site assembly of photovoltaic modules, ultimately improving electrical connection stability and lifespan while reducing costs and better meeting resource recycling and environmental protection requirements.

[0023] 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

[0024] 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.

[0025] Figure 1This is a cross-sectional view of a self-connecting photovoltaic junction box according to one embodiment of this application;

[0026] Figure 2 This is a schematic diagram illustrating the connection between a positive self-connecting photovoltaic junction box and a negative self-connecting photovoltaic junction box according to one embodiment of this application.

[0027] Figure 3 An exploded view of a self-connecting photovoltaic junction box according to one embodiment of this application;

[0028] Figure 4 This is a schematic diagram of the base, metal connector, and sealing ring according to one embodiment of this application;

[0029] Figure 5 This is a schematic diagram of the cover and diode module according to one embodiment of this application;

[0030] Figure 6 This is a schematic diagram of the structure of a diode module and a metal connector according to one embodiment of this application.

[0031] Explanation of the labels in the attached drawings:

[0032] 1000 self-connecting photovoltaic junction box;

[0033] Base 100; Snap-fit ​​part 101; Busbar outlet 102; First buckle 103; Horizontal extension part 104; Support panel 105; Boss 106; Second groove 107; Second positioning post 108; Support platform 109;

[0034] Box cover 200; receiving cavity 201; second buckle 202; first groove 203; first positioning post 204; overflow groove 205; cable reinforcement part 206; cable groove 207; wire clamping rib 208;

[0035] Diode module 300; metal sleeve 301; terminal block 302; metal drum spring 303; first positioning hole 304; bracket 305; clearance zone 306;

[0036] Metal connector 400; metal pin 401; metal base plate 402; second positioning hole 403; connecting groove 404;

[0037] 500; 501; 502; 502;

[0038] 600 sealing ring;

[0039] Cable 700. Detailed Implementation

[0040] 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.

[0041] 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.

[0042] 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.

[0043] See Figures 1-6 The diagram schematically illustrates a self-connecting photovoltaic junction box 1000 provided according to an embodiment of this application, mainly used for electrical transmission and protection of photovoltaic modules. The self-connecting photovoltaic junction box 1000 of this application may include: a base 100, a cover 200, a diode module 300, and a metal connector 400.

[0044] The base 100 has upwardly extending snap-fit ​​parts 101 on both sides along its length, a busbar outlet 102 on the base 100, a downwardly opening receiving cavity 201 on the cover 200, a diode module 300 in the receiving cavity 201, and a metal connector 400 on the base 100. The diode module 300 is provided with a metal sleeve 301 and a terminal block 302. The metal sleeve 301 is vertically arranged. The terminal block 302 is used to connect to one end of the corresponding cable 700. One end of the receiving cavity 201 is provided with a channel for the cable 700 to pass through. The metal connector 400 is provided with a connecting groove 404 for electrical connection with the busbar and a metal pin 401 corresponding to the metal sleeve 301. The metal pin 401 is also vertically arranged. Two snap-fit ​​parts 101 are used to snap-fit ​​the two outer sides of the cover 200 along the length direction so that the cover 200 and the base 100 are closed and the receiving cavity 201 is sealed. At the same time, the metal pin 401 is inserted into the metal sleeve 301 for electrical connection.

[0045] It should be noted that the metal sockets 301 on the diode module 300 are usually arranged in two symmetrical positions. The two metal sockets 301 can be located at both ends of the length direction of the diode module 300. The metal connectors 400 on the base 100 are also arranged in two symmetrical positions. The metal sockets 301 correspond one-to-one with the two metal connectors 400.

[0046] When the self-connecting photovoltaic junction box 1000 is installed on the photovoltaic module, the metal connector 400 is mounted on the base 100, forming a sub-assembly with the base 100. The base 100 can be installed on the photovoltaic module at the position of the busbar using sealant or other methods. The busbar passes through the busbar outlet 102 on the base 100 and is electrically connected to the connection groove 404 on the metal connector 400. The diode module 300 is mounted in the receiving cavity 201 of the box cover 200. One end of the cable 700 is electrically connected to the terminal 302 of the diode module 300, and the other end of the cable 700 extends out of the box through the receiving cavity 201. The cover 200 is placed on the outside, forming a sub-assembly with the diode module 300 and the cable 700. The cover 200 is connected to the base 100. When the two snap-fit ​​parts 101 of the base 100 are engaged with the cover 200 along its length, the cover 200 and base 100 are closed, and the receiving cavity 201 of the cover 200 is sealed. Simultaneously, the metal pin 401 is inserted into the metal sleeve 301 for electrical connection, achieving self-connection between the diode module 300 and the metal connector 400. The diode module 300 and the metal connector 400 are located within the sealed receiving cavity 201. When making electrical connections between two adjacent photovoltaic modules, refer to... Figure 2As shown, one of the self-connecting photovoltaic junction boxes 1000 on a photovoltaic module is the positive junction box, and the other of the self-connecting photovoltaic junction boxes 1000 on a photovoltaic module is the negative junction box. First, one end of the cable 700 is electrically connected to the terminal 302 of the diode module 300 inside the cover 200 of the positive junction box, and the other end of the cable 700 is electrically connected to the terminal 302 of the diode module 300 inside the cover 200 of the negative junction box, so that the two covers 200 form an assembly. Then, the two covers 200 are snapped together with the two bases 100 of the positive and negative junction boxes one by one to complete the electrical connection of the positive and negative junction boxes.

[0047] Therefore, the self-connecting photovoltaic junction box 1000 of this application, through the snap-fit ​​connection between the cover 200 and the base 100, forms a sub-assembly between the metal connector 400 and the base 100, and also between the diode module 300 and the cover 200. This makes the assembly and disassembly of the junction box simple, convenient, and quick, facilitating inspection, maintenance, replacement, and the classified recycling of the junction box after it is scrapped. At the same time, the metal pins 401 of the metal connector 400 and the metal sockets 301 of the diode module 300 can achieve self-connection, resulting in a compact and stable structure that is easy to manufacture and ensures stable and reliable electrical connections, greatly reducing the risk of photovoltaic system operation interruption due to connection failures. In addition, the two covers 200 of the positive and negative junction boxes between two adjacent photovoltaic modules can be pre-assembled into assemblies, achieving stable electrical connections without relying on traditional photovoltaic connectors. This simplifies the structure and facilitates the packaging, transportation, and on-site assembly of photovoltaic modules, ultimately improving the stability and service life of electrical connections while reducing costs, and better meeting the requirements of resource recycling and environmental protection. It can be widely used in various photovoltaic module systems, such as large-scale centralized photovoltaic power plants, small-scale distributed residential photovoltaic systems, or industrial and commercial photovoltaic systems.

[0048] In some embodiments, reference Figure 1 As shown, a metal spring 303 is provided inside the metal sleeve 301 for engaging with the metal pin 401. Therefore, because the metal spring 303 is located inside the metal sleeve 301, it is less prone to deformation and failure. During the insertion process between the metal pin 401 and the metal sleeve 301, the metal spring 303 and the metal pin 401 form a tight and reliable engagement, thereby ensuring electrical stability. Furthermore, the structure is robust, improving the product's insertion durability and reducing the risk of contact abnormalities.

[0049] In some embodiments, reference Figures 3-5As shown, each latching part 101 is provided with a first latch 103, and the two outer sides of the cover 200 along its length are respectively provided with second latches 202 for cooperating with the first latches 103. The first latches 103 and the second latches 202 can adopt a structure of latching blocks and slots, or a structure of latching blocks and latching blocks cooperating. Therefore, the cover 200 and the base 100 are easy to assemble, disassemble, and maintain, and the operation is convenient and quick.

[0050] Furthermore, horizontal extensions 104 for connecting with snap-fit ​​portions 101 are respectively provided on both sides of the base 100 along its length. The snap-fit ​​portion 101 and the connected horizontal extensions 104 form an L-shaped structure. The cover 200 is provided with a first groove 203 for correspondingly engaging with each horizontal extension 104. That is, the two first snaps 103 engage with the two second snaps 202 to snap-fit ​​the cover 200 to the base 100, while the two first grooves 203 respectively hold the corresponding horizontal extensions 104, thereby making the structural connection tighter and the structure more stable and reliable.

[0051] In some embodiments, reference Figure 1 , 5 As shown in Figure 6, the diode module 300 has multiple first positioning holes 304 at both ends along its length. The top of the receiving cavity 201 has multiple first positioning posts 204 corresponding to the first positioning holes 304, each positioned vertically. The first positioning holes 304 and the first positioning posts 204 can be tightly fitted together, allowing the diode module 300 to be cold-pressed into the receiving cavity 201, ensuring a tight fit between each first positioning hole 304 and each first positioning post 204. This positioning structure of the first positioning posts 204 and first positioning holes 304 facilitates precise installation of the diode module 300 within the receiving cavity 201 and ensures greater stability of the diode module 300.

[0052] Furthermore, at both ends of the diode module 300 along its length, there are upwardly extending brackets 305 that mate with the top of the receiving cavity 201. A metal sleeve 301 is located below the corresponding bracket 305. Each bracket 305 has a clearance section 306 for mates with the corresponding first positioning posts 204. Among these, with... Figure 1 and 6 For reference, the bracket 305 can have an upward-facing groove-shaped structure, with the groove being the clearance area 306. The first positioning holes 304 and their corresponding first positioning posts 204 at both ends of the diode module 300 along its length are respectively located in the corresponding clearance area 306. This design not only makes operation more convenient and the structure more stable, but also facilitates the connection between the diode and the cover 200.

[0053] Further, refer to Figure 1 , 5 As shown in Figure 6, the diode module 300 can be encapsulated in the receiving cavity 201 using potting compound. The two outer side walls of the bracket 305 can also have gaps between them and the two side walls of the receiving cavity 201 in the width direction, respectively, to facilitate potting compound filling. One end of the receiving cavity 201 is provided with a downward-facing overflow groove 205, and the end of the metal sleeve 301 away from the opening of the receiving cavity 201 is closed. The overflow groove 205 prevents potting compound from entering the metal sleeve 301 when the diode module 300 is encapsulated in the receiving cavity 201. Exemplarily, the diode module 300 can be cold-pressed into the receiving cavity 201 of the cover 200, so that each first positioning hole 304 and each first positioning post 204 are tightly connected, and gaps are left between the two outer side walls of the bracket 305 and the two side walls of the receiving cavity 201 in the length direction. Then, one end of the cable 700 is electrically connected to the terminal 302 of the diode module 300, and the other end of the cable 700 extends out of the cover 200 through a channel. Then, the box cover 200 is placed with the opening of the receiving cavity 201 facing upwards, and potting compound is injected into the receiving cavity 201 for sealing. Since the distance from the groove of the overflow groove 205 to the opening of the receiving cavity 201 is greater than the distance from the other end of the metal sleeve 301 to the opening of the receiving cavity 201 (when the opening of the receiving cavity 201 is placed upwards, the height of the groove of the overflow groove 205 is lower than the height of the metal sleeve 301), when the potting compound is higher than the groove of the overflow groove 205, the potting compound overflows into the overflow groove 205, thereby avoiding the potting compound from entering the metal sleeve 301 and causing the risk of clogging. With this setting, the safety and reliability are higher, and the structure is more stable.

[0054] In some embodiments, reference Figures 1-5 As shown, one end of the cover 200 along its length is provided with an outwardly extending cable reinforcement part 206. The cable reinforcement part 206 is provided with a cable groove 207 with its opening facing downward and communicating with the receiving cavity 201. The opening of the cable groove 207 is sealed by a pressure block 500, and a channel is formed between the pressure block 500 and the cable groove 207. For example, the pressure block 500 can be ultrasonically welded to the opening of the cable groove 207. The base 100 may be provided with a support panel 105 for cooperating with the bottom of the pressure block 500 and the bottom of the cable reinforcement part 206. The end of the pressure block 500 facing the cable groove 207 may be provided with an arc-shaped groove 501 for cooperating with the cable groove 207. The arc-shaped groove 501 may also be provided with a glue-filling through hole 502. The cable groove 207 may also be provided with a wire-pressing rib 208 for pressing and fixing the cable 700 in the channel. Terminal 302 can be located at the end of diode module 300 near the channel, and adhesive overflow groove 205 can be located at the end of receiving cavity 201 away from the channel.

[0055] During assembly, the diode module 300 is first installed in the receiving cavity 201. Then, one end of the cable 700 is electrically connected to the terminal 302 of the diode module 300, and the other end of the cable 700 extends out of the cover 200 through the cable groove 207 on the cable reinforcement part 206. The pressure block 500 is then ultrasonically welded to the opening of the cable groove 207. Potting compound is then injected into the potting through hole 502 to seal the cable 700 and the channel. Potting compound is then injected into the receiving cavity 201 to encapsulate the diode module 300, preventing leakage of the potting compound from the receiving cavity 201 along the channel. This design provides better sealing of the cover 200, preventing external environmental influences on the internal circuitry, thus avoiding oxidation and corrosion of metal components. Furthermore, the cable 700 is more secure, preventing it from swinging or breaking, improving product safety and reliability.

[0056] In some embodiments, reference Figure 1 As shown, a boss 106 is provided on the upper surface of the base 100, and a sealing ring 600 is sleeved on the outer side of the boss 106. The sealing ring 600 is used to cooperate with the inner wall of the receiving cavity 201 to seal when the box cover 200 and the base 100 are closed. The metal connector 400 and the manifold outlet 102 are provided on the boss 106.

[0057] After the cover 200 is snapped together with the base 100, the sealing ring 600 is located between the inner sidewall of the receiving cavity 201 and the outer sidewall of the boss 106, and the sealing ring 600 is compressed, thus making the structure more stable and the sealing better, preventing the metal components in the receiving cavity 201 from being oxidized and corroded, and improving the electrical performance and service life of the product.

[0058] In some embodiments, reference Figure 1 , 4 As shown in Figure 6, the metal connector 400 includes a metal base plate 402, a connecting groove 404, and a metal pin 401 disposed on the metal base plate 402, with the metal pin 401 perpendicular to the metal base plate 402. The connecting groove 404 can store solder, facilitating electrical connection between the busbar and the metal connector 400. This design results in a simple, stable structure and more convenient operation.

[0059] Furthermore, a second groove 107 is provided on the upper surface of the boss 106, and the busbar outlet 102 and the metal connector 400 are provided on the bottom surface of the second groove 107. This arrangement makes the structure more compact and stable, and also better protects the metal connector 400, making it safer and more reliable.

[0060] Furthermore, a plurality of second positioning posts 108 are provided on the bottom surface of the second groove 107, each second positioning post 108 being arranged vertically, and a plurality of second positioning holes 403 corresponding one-to-one with the plurality of second positioning posts 108 are provided on the metal base plate 402. A plurality of support platforms 109 corresponding one-to-one with the second positioning posts 108 are also provided on the bottom surface of the second groove 107, with the outer diameter of the support platform 109 being larger than the outer diameter of the second positioning post 108, and each second positioning post 108 being mounted on its corresponding support platform 109. The respective second positioning posts 108 and the respective second positioning holes 403 can be connected by a tight fit. This design makes operation more convenient, the structure more stable and reliable, and ensures that the metal connector 400 is more accurately installed on the base 100.

[0061] A photovoltaic module is also provided according to an embodiment of this application, including the self-connecting photovoltaic junction box 1000 provided in the above embodiments. Other structures of the photovoltaic module can adopt corresponding structures in the art, which will not be described in detail here.

[0062] 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.

[0063] 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 self-connecting photovoltaic junction box, characterized in that, Used in photovoltaic modules, including: The base (100) has upwardly extending snap-fit ​​parts (101) on both sides of its length direction, and the base (100) has a busbar outlet (102). A box cover (200) having a downward-facing receiving cavity (201); A diode module (300) is disposed in the receiving cavity (201). The diode module (300) is provided with a metal socket (301) and a terminal (302). The metal socket (301) is arranged vertically. The terminal (302) is used to connect to one end of a corresponding cable (700). One end of the receiving cavity (201) is provided with a channel for the cable (700) to pass through. A metal connector (400) is disposed on the base (100). The metal connector (400) is provided with a connection groove (404) for electrical connection with the busbar and a metal pin (401) corresponding to the metal sleeve (301). The two snap-fit ​​parts (101) are used to snap-fit ​​the two outer sides of the cover (200) along the length direction so that the cover (200) is closed with the base (100) and the receiving cavity (201) is sealed. At the same time, the metal pin (401) is inserted into the metal sleeve (301) for electrical connection.

2. The self-connecting photovoltaic junction box according to claim 1, characterized in that, The metal sleeve (301) is provided with a metal drum spring (303) for cooperating with the metal pin (401).

3. The self-connecting photovoltaic junction box according to claim 1, characterized in that, Each of the latching parts (101) is provided with a first latch (103), and the two outer sides of the box cover (200) in the length direction are respectively provided with second latches (202) for cooperating with the first latches (103); The base (100) has horizontal extensions (104) on both sides along its length for connecting with the snap-fit ​​portion (101). The snap-fit ​​portion (101) and the horizontal extensions (104) it connects to form an L-shaped structure. The cover (200) has a first groove (203) for correspondingly engaging with each of the horizontal extensions (104).

4. The self-connecting photovoltaic junction box according to claim 1, characterized in that, The diode module (300) has multiple first positioning holes (304) at both ends of its length direction, and the top of the receiving cavity (201) has multiple first positioning posts (204) corresponding one-to-one with the multiple first positioning holes (304), and each first positioning post (204) is arranged in the vertical direction. The diode module (300) has brackets (305) extending upward at both ends along its length and engaging with the top of the receiving cavity (201). The metal sleeve (301) is located below the bracket (305). Each bracket (305) has a clearance area (306) for engaging with the corresponding first positioning post (204).

5. The self-connecting photovoltaic junction box according to claim 1, characterized in that, The diode module (300) is encapsulated in the receiving cavity (201) with potting compound. One end of the receiving cavity (201) is provided with an overflow groove (205) with the groove opening facing downward. The end of the metal sleeve (301) away from the opening of the receiving cavity (201) is closed. The overflow groove (205) is used to prevent potting compound from entering the metal sleeve (301) when the diode module (300) is encapsulated in the receiving cavity (201).

6. The self-connecting photovoltaic junction box according to claim 5, characterized in that, One end of the cover (200) along its length is provided with an outwardly extending cable reinforcement part (206). The cable reinforcement part (206) is provided with a cable groove (207) with its opening facing downward and communicating with the receiving cavity (201). The opening of the cable groove (207) is sealed by a pressure block (500). The pressure block (500) and the cable groove (207) form the channel. The base (100) is provided with a support panel (105) for cooperating with the bottom of the pressure block (500) and the bottom of the cable reinforcement part (206).

7. The self-connecting photovoltaic junction box according to claim 6, characterized in that, The cable groove (207) is provided with a wire pressing rib (208), and the pressing block (500) is provided with an arc-shaped groove (501) for cooperating with the cable groove (207) at one end facing the cable groove (207). The arc-shaped groove (501) is provided with a glue-filling through hole (502). The terminal block (302) is located at one end of the diode module (300) near the channel, and the glue overflow groove (205) is located at one end of the receiving cavity (201) away from the channel.

8. The self-connecting photovoltaic junction box according to claim 1, characterized in that, The upper surface of the base (100) is provided with a boss (106), and a sealing ring (600) is sleeved on the outside of the boss (106). The sealing ring (600) is used to cooperate with the inner wall of the receiving cavity (201) to seal when the box cover (200) is closed with the base (100). The metal connector (400) and the manifold outlet (102) are provided on the boss (106).

9. The self-connecting photovoltaic junction box according to claim 8, characterized in that, The metal connector (400) includes a metal base plate (402), the connecting groove (404) and the metal pin (401) are disposed on the metal base plate (402), and the metal pin (401) is perpendicular to the metal base plate (402); The upper surface of the boss (106) is provided with a second groove (107), and the busbar outlet (102) and the metal connector (400) are provided on the bottom surface of the second groove (107); The bottom surface of the second groove (107) is provided with a plurality of second positioning posts (108), each of the second positioning posts (108) is arranged in a vertical direction, and the metal base plate (402) is provided with a plurality of second positioning holes (403) corresponding one-to-one with the plurality of second positioning posts (108). The bottom surface of the second groove (107) is also provided with a plurality of support platforms (109) corresponding one-to-one with the second positioning posts (108), and the outer diameter of the support platform (109) is larger than the outer diameter of the second positioning post (108). Each second positioning post (108) is arranged on its corresponding support platform (109).

10. A photovoltaic module, characterized in that, Includes the self-connecting photovoltaic junction box as described in any one of claims 1 to 9.

Images