Photovoltaic junction box structure

Abstract

The utility model provides a photovoltaic junction box structure, which relates to the technical field of photovoltaic accessories and comprises a shell provided with an accommodating cavity, supporting legs arranged on the bottom wall of the accommodating cavity, limiting clamping pieces respectively arranged on a first side wall and a second side wall which are opposite in the accommodating cavity, and hole structures respectively arranged on a third side wall and a fourth side wall which are opposite in the accommodating cavity; the circuit board is arranged in the containing cavity and abuts against the position between the supporting foot and the limiting clamping piece. And the cable extends into the shell from the hole structure and is connected with the circuit board. According to the utility model, the supporting legs are matched with the limiting clamping pieces to play a role in limiting and fixing the circuit board, the problem that the circuit board deviates due to the action of fluid in the glue filling process can be avoided, the stability and reliability of the whole system are enhanced, and the supporting legs enable a certain gap to exist between the circuit board and the bottom wall, so that the heat dissipation of the circuit board is facilitated.

Description

Technical Field

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

[0002] Photovoltaic (PV) modules convert solar energy into electrical energy, which is then stored in batteries or used to power loads. A PV junction box is a connecting device between the solar cell array (composed of PV modules) and the solar charging control device. Its main functions are to connect and protect the solar PV modules, connect the power generated by the solar cells to external power lines, and conduct the current generated by the PV modules.

[0003] Existing photovoltaic junction boxes include a housing and a circuit board housed within the housing, with cables leading out from inside the housing. Currently, the circuit board is typically placed inside the housing and fixed with potting compound. The applicant has discovered that the prior art has at least the following technical problems:

[0004] 1. The circuit board junction box is not effectively limited and fixed. During the potting process, it is easy to shift due to the fluid, which will reduce the reliability of the cable connection to the circuit board, cause unstable current, and damage the entire system.

[0005] 2. The circuit board is close to the side wall of the casing, which leads to poor heat dissipation and makes the photovoltaic junction box prone to aging due to excessive temperature. In addition, the circuit board is easily damaged in the event of an accident such as a collision.

[0006] Therefore, there is an urgent need for a photovoltaic junction box structure to solve the above-mentioned technical problems. Utility Model Content

[0007] The purpose of this utility model is to provide a photovoltaic junction box structure to solve the problems existing in the prior art, such as the lack of effective limiting and fixing within the circuit board junction box, easy displacement due to fluid action during the potting process, resulting in poor reliability of the cable-to-circuit board connection, unstable current, and potential damage to the entire system; and the close proximity of the circuit board to the side wall of the casing, leading to poor heat dissipation and easy aging of the photovoltaic junction box due to excessive temperature; furthermore, the circuit board is easily damaged in the event of collisions or other accidents. The various technical effects of the preferred technical solutions provided by this utility model are detailed below.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] This utility model provides a photovoltaic junction box structure, comprising:

[0010] The housing has a receiving cavity, the bottom wall of the receiving cavity is provided with a support foot, the first and second side walls inside the receiving cavity are respectively provided with limiting clips, and the third and fourth side walls inside the receiving cavity are respectively provided with hole structures.

[0011] A circuit board is disposed within the receiving cavity and abuts against the support foot and the limiting clip;

[0012] The cable extends into the housing through the hole structure and connects to the circuit board.

[0013] Preferably, the cable includes a first cable for connecting the circuit board and the photovoltaic module and a second cable for connecting the circuit board and the inverter, wherein the first cable includes at least two sets.

[0014] Preferably, three hole structures are provided on the second sidewall and the fourth sidewall respectively. The hole structures on the second sidewall and the hole structures on the fourth sidewall are configured as a group in a one-to-one correspondence. The first group of hole structures and the second group of hole structures are used for the first cable to pass through, and the third group of hole structures is used for the second cable to pass through.

[0015] Preferably, an overflow groove is provided at the corner of the receiving cavity by means of a folding plate, the height of the overflow groove is higher than the height of the limiting clip, and a notch is provided on the top surface of the overflow groove.

[0016] Preferably, the top surface of the overflow groove is higher than the top surface of the receiving cavity, and the bottom surface of the notch is not higher than the top surface of the receiving cavity.

[0017] Preferably, it further includes a filler adhesive disposed within the receiving cavity.

[0018] Preferably, a support structure is provided on both the second sidewall and the fourth sidewall.

[0019] Preferably, the housing comprises:

[0020] The main body, wherein the receiving cavity is disposed in the main body;

[0021] The cover plate is provided with a first connection structure for connection with the main body.

[0022] Preferably, an extension section is formed by extending along the sidewall of the receiving cavity away from the bottom wall, and a groove is provided on the inner periphery of the extension section, and a second connection structure is provided on the sidewall of the groove for connection with the first connection structure.

[0023] Preferably, the first connecting structure uses a slot and / or a block, and the second connecting structure uses a block and / or a slot.

[0024] The photovoltaic junction box structure provided by this utility model features a support foot on the bottom wall of the receiving cavity, and limiting clips on the first and second side walls of the receiving cavity. The circuit board is placed inside the receiving cavity and abuts against the support foot and the limiting clip. The support foot creates a certain gap between the circuit board and the bottom wall, which helps to dissipate heat from the circuit board. On the other hand, the support foot and the limiting clip cooperate to limit and fix the circuit board. By fixing the circuit board inside the housing, the problem of the circuit board shifting due to the fluid during the potting process can be avoided, thus enhancing the stability and reliability of the entire system. At the same time, it can also prevent damage to the circuit board due to insecure fixing or loosening of the cable connections on the circuit board in the event of an accident such as a collision with the housing. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of one embodiment of the photovoltaic junction box structure of this utility model;

[0027] Figure 2 yes Figure 1 A structural diagram from another angle;

[0028] Figure 3 This is an exploded structural diagram of the photovoltaic junction box structure of this utility model;

[0029] Figure 4 yes Figure 1 A top-view structural diagram.

[0030] In the figure: 1. Shell; 11. Main body; 100. Receiving cavity; 101. First side wall; 102. Second side wall; 103. Third side wall; 104. Fourth side wall; 105. Bottom wall; 110. Extension section; 111. Groove; 112. Second connecting structure; 12. Cover plate; 120. First connecting structure;

[0031] 2. Circuit board; 3. Cable; 31. First cable; 32. Second cable;

[0032] 4. Support feet; 5. Limiting clips; 6. Hole structure; 61. First group of hole structure; 62. Second group of hole structure; 63. Third group of hole structure;

[0033] 7. Folding plate; 70. Glue overflow groove; 71. Notch; 8. Support structure. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0035] Figure 1 This is a structural schematic diagram of this embodiment. Figure 2 yes Figure 1 Another structural diagram, such as Figure 1 and Figure 2 As shown, this utility model provides a photovoltaic junction box structure, including a housing 1, a circuit board 2, and a cable 3.

[0036] In this embodiment, the housing 1 is a rectangular structure with an opening on the top surface. An accommodating cavity 100 is formed inside the housing 1. The accommodating cavity 100 includes a bottom wall 105 disposed opposite to the top opening, and a first side wall 101, a third side wall 103, a second side wall 102, and a fourth side wall 104 sequentially surrounding the bottom wall 105.

[0037] The bottom wall 105 of the receiving cavity 100 is provided with support feet 4. The first side wall 101 and the second side wall 102 opposite to each other in the receiving cavity 100 are respectively provided with limiting clips 5. The third side wall 103 and the fourth side wall 104 opposite to each other in the receiving cavity 100 are respectively provided with hole structures 6. The cable 3 extends into the housing 1 through the hole structure 6 and connects to the circuit board 2.

[0038] The circuit board 2 is disposed within the receiving cavity 100, abutting against the support leg 4 and the limiting clip 5. The support leg 4 creates a certain gap between the circuit board 2 and the bottom wall 105. This arrangement facilitates heat dissipation for the circuit board 2; furthermore, the support leg 4 and the limiting clip 5 work together to limit and secure the circuit board 2. Fixing the circuit board 2 within the housing 1 prevents it from shifting due to fluid during the potting process, enhancing the stability and reliability of the entire system. It also prevents damage to the circuit board 2 or loosening of cables in the event of a collision or other accident involving the housing 1.

[0039] As an optional implementation method, Figure 3 This is an exploded structural diagram of this embodiment, as shown below. Figure 3 As shown, the housing 1 includes a main body 11 and a cover plate 12, wherein a receiving cavity 100 is disposed in the main body 11; the cover plate 12 is provided with a first connection structure 120 for connecting with the main body 11.

[0040] Specifically, an extension section 110 is formed by extending along the side wall of the receiving cavity 100 away from the bottom wall 105. A groove 111 is provided on the inner periphery of the extension section 110, and a second connection structure 112 for connecting with the first connection structure 120 is provided on the side wall of the groove 111.

[0041] In actual production and use, the first connecting structure 120 can be configured to use a slot, and the second connecting structure 112 can be configured to use a block; or the first connecting structure 120 can include one or more slots and one or more blocks, and the second connecting structure can include one or more blocks and one or more slots; of course, the first connecting structure 120 can also be configured to use a block, and the second connecting structure 112 can use a slot. By using a snap-fit ​​connection, the connection can be made more convenient to use and the stability of the connection can be better.

[0042] As an optional implementation method, Figure 4 yes Figure 1 A top-view structural diagram, such as Figure 4 As shown, cable 3 includes a first cable 31 for connecting circuit board 2 and photovoltaic module and a second cable 32 for connecting circuit board 2 and inverter. The first cable 31 includes at least two sets.

[0043] Specifically, in this embodiment, three hole structures 6 are respectively provided on the second sidewall 102 and the fourth sidewall 104. The hole structures on the second sidewall 102 and the hole structures on the fourth sidewall 104 are set as a group in a one-to-one correspondence. The first group of hole structures 61 and the second group of hole structures 62 are used for the first cable 31 to pass through, and the third group of hole structures 63 is used for the second cable 32 to pass through.

[0044] Optionally, in this embodiment, the center lines of the three hole structures on the second sidewall 102 are on a straight line, and the center line is higher than the center of the second sidewall 102. Similarly, the center lines of the three hole structures on the fourth sidewall 104 are on a straight line, and the center line is higher than the center of the fourth sidewall 104. This arrangement can improve the stability of the connection between the cable and the circuit board 2, making the cable safer and more reliable during use. In this embodiment, a third set of hole structures 63 is provided between the first set of hole structures 61 and the second set of hole structures 62 to facilitate connection and use.

[0045] With this configuration, the two sets of first cables 31 can connect to two sets of photovoltaic modules respectively, achieving a one-to-two connection, meaning that two sets of photovoltaic modules share a single photovoltaic junction box. This offers higher cost-effectiveness and is also safer and more reliable during use. Furthermore, in this embodiment, by directly opening through holes in the side wall of the housing 1, compared to the prior art which uses semi-circular holes on the main body 11 and cover plate 12 of the housing to form a snap-fit ​​hole structure, the stability is better and sealing is easier.

[0046] As an optional implementation, this embodiment also includes a filler adhesive disposed within the receiving cavity 100 for effectively sealing the receiving cavity 100.

[0047] Specifically, in this embodiment, an overflow groove 70 is formed at the corner of the receiving cavity 100 by a folding plate 7. The height of the overflow groove 70 is higher than the height of the limiting clip 5, and a notch 71 is provided on the top surface of the overflow groove 70. This design serves two purposes: firstly, by providing a groove structure protruding into the receiving cavity 100 at the corner where glue needs to be injected, the corner of the receiving cavity 100 is reinforced and supported, and the internal space of the receiving cavity 100 is reduced, thus saving filler glue; secondly, when the receiving cavity 100 is filled and sealed with filler glue, if there is too much glue, it can enter into the overflow groove 70 through the notch 71, preventing excessive leakage of filler glue.

[0048] In this embodiment, the top surface of the overflow groove 70 is higher than the top surface of the receiving cavity 100, and the bottom surface of the notch 71 is not higher than the top surface of the receiving cavity 100, ensuring that the overflowing glue smoothly enters the overflow groove 70.

[0049] As an optional implementation, a support structure 8 is provided on both the second sidewall 102 and the fourth sidewall 104. In this embodiment, the support structure 8 is a strip block. The support structure 8 is used to effectively strengthen and support the sidewall of the receiving cavity 100, thereby improving the structural strength of the entire shell 1.

[0050] Specifically, in this embodiment, two strip blocks are respectively provided on the second sidewall 102 and the fourth sidewall 104. The two strip blocks on each sidewall are located between two limiting clips, and the limiting clips and strip blocks are equidistantly distributed.

[0051] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A photovoltaic junction box structure, characterized in that, include: The housing has a receiving cavity, the bottom wall of the receiving cavity is provided with a support foot, the first and second side walls inside the receiving cavity are respectively provided with limiting clips, and the third and fourth side walls inside the receiving cavity are respectively provided with hole structures. A circuit board is disposed within the receiving cavity and abuts against the support leg and the limiting clip; The cable extends into the housing through the hole structure and connects to the circuit board.

2. The photovoltaic junction box structure according to claim 1, characterized in that: The cables include a first cable for connecting the circuit board and the photovoltaic module and a second cable for connecting the circuit board and the inverter, wherein the first cable includes at least two sets.

3. The photovoltaic junction box structure according to claim 2, characterized in that: Three hole structures are respectively provided on the second sidewall and the fourth sidewall. The hole structures on the second sidewall and the hole structures on the fourth sidewall are configured as a group in a one-to-one correspondence. The first group of hole structures and the second group of hole structures are used for the first cable to pass through, and the third group of hole structures is used for the second cable to pass through.

4. The photovoltaic junction box structure according to any one of claims 1-3, characterized in that: An overflow groove is provided at the corner of the receiving cavity by means of a folding plate. The height of the overflow groove is higher than the height of the limiting clip, and a notch is provided on the top surface of the overflow groove.

5. The photovoltaic junction box structure according to claim 4, characterized in that: The top surface of the overflow groove is higher than the top surface of the receiving cavity, and the bottom surface of the notch is not higher than the top surface of the receiving cavity.

6. The photovoltaic junction box structure according to claim 5, characterized in that: It also includes a filler adhesive, which is disposed within the receiving cavity.

7. The photovoltaic junction box structure according to any one of claims 1-3, characterized in that: Both the second sidewall and the fourth sidewall are provided with support structures.

8. The photovoltaic junction box structure according to any one of claims 1-3, characterized in that: The housing includes: The main body, wherein the receiving cavity is disposed in the main body; The cover plate is provided with a first connection structure for connection with the main body.

9. The photovoltaic junction box structure according to claim 8, characterized in that: An extension section is formed by extending along the sidewall of the receiving cavity away from the bottom wall. A groove is provided on the inner circumference of the extension section, and a second connection structure is provided on the sidewall of the groove for connection with the first connection structure.

10. The photovoltaic junction box structure according to claim 9, characterized in that: The first connection structure uses a slot and / or a block, and the second connection structure uses a block and / or a slot.

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