Large-current narrow-side patch type junction box

Abstract

The utility model discloses a heavy current narrow side paster type junction box, comprising a box body, a box cover, an electric conductor and a cable, the box body is a hollow cuboid structure, the electric conductor is arranged in the box body, the box cover is covered on the box body, the electric conductor comprises a diode and a conductive heat radiation plate, the conductive heat dissipation plate comprises a first plate body, a second plate body, a third plate body, a side connecting plate and a side folding part, the first plate body, the second plate body and the third plate body are arranged at intervals along a straight line and form a rectangular structure, and the bottom surface of the side connecting plate is fixedly connected with the same side of the first plate body, the second plate body and the third plate body; the first plate body and the second plate body are respectively provided with a bus bar fixing position, the second plate body and the third plate body are welded with a diode together, the side folding part is parallel to the side connecting plate and is arranged on the other side of the second plate body, and one end of the cable is fixed on the first plate body. According to the utility model, the current of the junction box can be improved, the generating capacity can be increased, and the installation problem of a solar assembly with a very small installation space can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic component equipment, in particular to a large-current narrow-edge patch type junction box. Background Art

[0002] In the current photovoltaic field, with the continuous development of technology and the pursuit of higher energy efficiency, people are committed to obtaining greater power generation and making fuller use of the effective area of ​​solar cell modules. However, this has also led to a gradual reduction in the available width of the edge of the solar cell module. In this context, traditional photovoltaic junction boxes are often difficult to install and adapt in such a small space due to their design and structural limitations.

[0003] This mismatch situation brings a series of challenges to technicians in this field. First, the width of the traditional junction box is too large to meet the requirements of a small installation space, which may make installation difficult or even impossible. Second, the layout and structure of the traditional junction box may not be flexible enough to adapt to the compact space at the edge of the component, thus affecting the overall installation effect and power generation. In addition, the fixing and connection methods of the traditional junction box are not convenient enough, further increasing the difficulty and complexity of installation.

[0004] Therefore, how to effectively solve the installation and matching problem between the solar junction box and the solar cell module has become a key and urgent problem facing those skilled in the art. Utility Model Content

[0005] In view of this, the utility model proposes a high-current narrow-edge patch type junction box, which aims to both increase the current of the junction box to increase power generation and effectively solve the installation problem of solar panels in extremely small installation spaces.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A high-current narrow-edge patch-type junction box, comprising a box body, a box cover, a conductor and a cable, the box body being a hollow rectangular parallelepiped structure, a cable port being provided on the side wall of the box body, one end of the cable extending into the box body from the cable port, the conductor being fixedly arranged in the box body, a busbar opening being provided on the bottom surface of the box body, the box cover being fixedly covered on the top of the box body, the conductor comprising a diode and a conductive heat dissipation plate, the conductive heat dissipation plate comprising a first plate body, a second plate body, a third plate body, a side connecting plate and a side folding portion, the first plate body, the second plate body and the third plate body being arranged at intervals along a straight line and forming a rectangular structure, the bottom surfaces of the side connecting plates being fixedly connected to the same side of the first plate body, the second plate body and the third plate body, the ends of the first plate body and the second plate body being close to each other are respectively provided with busbar fixing positions, the ends of the second plate body and the third plate body being close to each other are jointly welded with a diode, the side folding portion is parallel to the side connecting plate and fixedly arranged on the other side of the second plate body, and the end of the cable extending into the box body is fixed on the first plate body.

[0008] To better implement the above technical solution, optionally, the side folding portion and the second plate body are an integral structure.

[0009] Optionally, the side connecting plates are an integral structure with the first plate body, the second plate body and the third plate body.

[0010] Optionally, the gap between the box body and the conductor is filled with potting glue.

[0011] Optionally, the cable opening is provided with a pressing block for closing a gap between the cable opening and the cable.

[0012] Optionally, the end of the cable extending into the box body is riveted to the first plate body.

[0013] Optionally, the diode is welded to the second plate body and the third plate body through a positive pin and a negative pin respectively.

[0014] Optionally, the first plate body, the second plate body and the third plate body are respectively provided with positioning holes, and the box body is provided with a positioning column adapted to each positioning hole.

[0015] Beneficial effects of the utility model:

[0016] The utility model discloses a high-current narrow-edge patch-type junction box, in which the conductive heat sink adopts a rectangular folding and bending structure and is arranged in a three-dimensional manner in the box body, occupying a small width space. The conductive heat sink is bent on both sides of the welding area of ​​the diode positive pin, increasing the area of ​​the welding area between the diode positive pin and the conductive heat sink, thereby increasing the heat dissipation. Compared with the prior art, the junction box has a large rated current, occupies a small space, and has a high power generation efficiency. In particular, the width of the box body is very small, which is suitable for extremely small installation spaces. The junction box and the busbar are arranged in a degree, which is more convenient for on-site installation. The number of box bodies can be determined according to the number of busbars in the assembly, and the installation and wiring are very flexible, which is suitable for assemblies with any number of battery strings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of a high-current narrow-edge patch type junction box according to an embodiment of the utility model;

[0018] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the middle box body;

[0019] Figure 3 yes Figure 1 Schematic diagram of the conductor in the figure;

[0020] Figure 4 yes Figure 3 Exploded diagram of

[0021] Reference numerals:

[0022] Box body 10, positioning column 101, cable port 102, busbar opening 103, box cover 20, conductor 30, diode 31, positive electrode pin 311, negative electrode pin 312, conductive heat sink 32, first plate 321, second plate 322, third plate 323, side connecting plate 324, side folding portion 325, busbar fixing position 326, positioning hole 327, positive electrode pin welding slot 328, negative electrode pin welding slot 329, cable 40, pressing block 50. DETAILED DESCRIPTION

[0023] The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings and specific embodiments, wherein the same components are represented by the same reference numerals.

[0024] See also Figures 1 to 4 The utility model embodiment discloses a large current narrow edge patch type junction box, which includes a box body 10, a box cover 20, a conductor 30 and a cable 40.

[0025] like Figure 1 and Figure 2As shown, the box body 10 is a hollow rectangular structure to adapt to the actual situation that the available width of the edge of the existing solar cell module is small. The side wall of the box body 10 is provided with a cable opening 102, one end of the cable 40 extends into the box body 10 from the cable opening 102, the conductor 30 is fixed in the box body 10, the bottom surface of the box body 10 is provided with a busbar opening 103, and the box cover 20 is fixedly covered on the top of the box body 10.

[0026] like Figure 3 and Figure 4 As shown, the conductor 30 includes a diode 31 and a conductive heat sink 32. The conductive heat sink 32 includes a first plate 321, a second plate 322, a third plate 323, a side connecting plate 324 and a side folding portion 325. The first plate 321, the second plate 322 and the third plate 323 are arranged along a straight line and form a rectangular structure, so that there is installation space between the first plate 321 and the second plate 322, and between the second plate 322 and the third plate 323. The bottom surfaces of the side connecting plates 324 are fixedly connected to the same side of the first plate body 321, the second plate body 322 and the third plate body 323. Specifically, the side connecting plates 324 are an integral structure with the first plate body 321, the second plate body 322 and the third plate body 323, thereby enhancing the overall stability. The ends of the first plate body 321 and the second plate body 322 that are close to each other are respectively provided with busbar fixing positions 326, and the busbar fixing positions 326 are groove positions lower than the top surface of the first plate body 321. The diode 31 is welded together at the ends of the second plate 322 and the third plate 323 that are close to each other. Specifically, the diode 31 is welded to the second plate 322 and the third plate 323 through the positive pin 311 and the negative pin 312 respectively. This connection method ensures the reliability of conductivity. More specifically, the second plate 322 is provided with a positive pin welding slot 328, and the third plate 323 is provided with two negative pin welding slots 329. The positive pin 311 of the diode 31 is welded in the positive pin welding slot 328, and the two negative pins 312 of the diode 31 are correspondingly welded in the two negative pin welding slots 329, thereby achieving precise welding and connection.

[0027] The side folding portion 325 is parallel to the side connecting plate 324 and is fixed on the other side of the second plate body 322. Specifically, the side folding portion 325 and the second plate body 322 are an integral structure, which further improves the strength and stability of the structure. There are two side folding portions 325, which are arranged at intervals, which is beneficial to increase the heat dissipation area and improve the heat dissipation effect. The end of the cable 40 extending into the box body 10 is fixed on the first plate body 321. Specifically, the end of the cable 40 extending into the box body 10 is riveted on the first plate body 321, ensuring a firm connection between the cable 40 and the conductor 30, while also preventing the cable 40 from loosening or falling off.

[0028] In an optional embodiment of the utility model, the gap between the box body 10 and the conductor 30 is filled with potting glue to seal and wrap the conductor 30. The potting glue can not only effectively prevent the conductor 30 from being affected by the external environment, but also enhance the sealing performance of the box body 10, prevent water vapor and the like from entering the box body 10 to damage the circuit, and at the same time improve the insulation performance of the junction box, reduce the risk of leakage, and ensure the safe and stable operation of the entire photovoltaic system.

[0029] In an optional embodiment of the utility model, the cable opening 102 is provided with a pressure block 50 for closing the gap between the cable opening 102 and the cable 40. The pressure block 50 can enhance the firmness of the connection between the cable 40 and the junction box to avoid loose connection or damage due to shaking or pulling of the cable 40.

[0030] In an optional embodiment of the present invention, the first plate 321, the second plate 322 and the third plate 323 are respectively provided with positioning holes 327, and a positioning column 101 adapted to each positioning hole 327 is provided in the box body 10. Specifically, the first plate 321 and the second plate 322 are each provided with two positioning holes 327, and the third plate 323 is provided with one positioning hole 327. Correspondingly, five positioning columns 101 are provided on the bottom surface of the box body 10, and the positioning columns 101 are plugged into the positioning holes 327. This not only enables the conductive heat dissipation plate 32 to be accurately positioned and installed in the box body 10, thereby improving the installation efficiency and accuracy, but also enhances the connection stability between each plate body and the box body 10.

[0031] When installing a high-current narrow-edge patch-type junction box of the utility model, silicone is applied to the bottom of the junction box and bonded to the solar panel. The busbar enters the junction box through the busbar opening 103 and is welded to the busbar fixing position 326 on the conductor 30. Then, potting glue is injected and the box cover 20 is covered before use.

[0032] In an embodiment of the present invention, the junction box is a negative electrode junction box. In other optional embodiments, the junction box may be a positive electrode junction box or an intermediate junction box.

[0033] The utility model embodiment discloses a high-current narrow-edge patch-type junction box, in which the conductive heat sink 32 adopts a rectangular folding and bending structure and is arranged in a three-dimensional manner in the box body 10, occupying a small width space. The conductive heat sink 32 is bent on both sides of the welding area of ​​the positive pin of the diode 31, increasing the area of ​​the welding area between the positive pin of the diode 31 and the conductive heat sink 32, thereby increasing the heat dissipation. Compared with the prior art, the junction box has a large rated current, occupies a small space, and has a high power generation efficiency. In particular, the width of the box body 10 is very small, which is suitable for extremely small installation space. The junction box and the busbar are arranged at 90 degrees, which is more convenient for on-site installation. The number of box bodies 10 can be determined according to the number of busbars in the assembly, and the installation and wiring are very flexible, which is suitable for assemblies of any number of battery strings.

[0034] The technical solution of the utility model is described in detail above in combination with specific embodiments, and the described specific embodiments are used to help understand the concept of the utility model. Derivations and variations made by those skilled in the art based on the specific embodiments of the utility model also fall within the protection scope of the utility model.

Claims

1. A high-current narrow-edge patch-type junction box, comprising a box body (10), a box cover (20), a conductor (30) and a cable (40), wherein the box body (10) is a hollow rectangular parallelepiped structure, a side wall of the box body (10) is provided with a cable opening (102), one end of the cable (40) extends into the box body (10) from the cable opening (102), the conductor (30) is fixedly arranged in the box body (10), a busbar opening (103) is provided on the bottom surface of the box body (10), and the box cover (20) is fixedly covered on the top of the box body (10), characterized in that: The conductor (30) comprises a diode (31) and a conductive heat dissipation plate (32); the conductive heat dissipation plate (32) comprises a first plate body (321), a second plate body (322), a third plate body (323), a side connecting plate (324) and a side folding portion (325); the first plate body (321), the second plate body (322) and the third plate body (323) are arranged along a straight line at intervals to form a rectangular structure; the bottom surface of the side connecting plate (324) is aligned with the first plate body (321), the second plate body (322) and the third plate body (323). , and are fixedly connected to the same side of the third plate body (323); the ends of the first plate body (321) and the second plate body (322) that are close to each other are respectively provided with a busbar fixing position (326); the ends of the second plate body (322) and the third plate body (323) that are close to each other are jointly welded with a diode (31); the side folding portion (325) is parallel to the side connecting plate (324) and is fixedly arranged on the other side of the second plate body (322); and the end of the cable (40) extending into the box body (10) is fixed on the first plate body (321).

2. A high current narrow edge SMD junction box according to claim 1, characterized in that: The side folding portion (325) and the second plate body (322) are an integral structure.

3. A high current narrow edge SMD junction box according to claim 1, characterized in that: The side connecting plates (324) are an integral structure with the first plate body (321), the second plate body (322) and the third plate body (323).

4. A high current narrow edge SMD junction box according to claim 1, characterized in that: The gap between the box body (10) and the conductor (30) is filled with potting glue.

5. A high current narrow edge SMD junction box according to claim 1, characterized in that: The cable opening (102) is provided with a pressing block (50) for closing a gap between the cable opening (102) and the cable (40).

6. A high current narrow edge SMD junction box according to claim 1, characterized in that: The end of the cable (40) extending into the box body (10) is riveted to the first plate body (321).

7. A high current narrow edge SMD junction box according to claim 1, characterized in that: The diode (31) is welded to the second plate body (322) and the third plate body (323) respectively via the positive electrode pin (311) and the negative electrode pin (312).

8. A high current narrow edge SMD junction box according to claim 1, characterized in that: The first plate body (321), the second plate body (322) and the third plate body (323) are respectively provided with positioning holes (327), and a positioning column (101) adapted to each positioning hole (327) is provided in the box body (10).

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