CN219420718U

CN219420718U - Electric conduction heat conduction piece and photovoltaic junction box thereof

Info

Publication number: CN219420718U
Application number: CN202320178054.1U
Authority: CN
Inventors: 马燕
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-02-07
Filing date: 2023-02-07
Publication date: 2023-07-25
Anticipated expiration: 2033-02-07

Abstract

The utility model discloses an electric and heat conducting piece and a photovoltaic junction box thereof, and relates to the technical field of junction boxes. Including the slice body, the slice body is sheet structure, just be provided with four connection interfaces on the slice body, it is first interface, second interface, third interface and fourth interface respectively, wherein: the first interface is used for forming electrical connection with the cable; the second interface is used for forming electric connection with the bus bar; the third interface is used for forming heat conduction connection with a heat dissipation assembly, and the heat dissipation assembly is used for increasing the heat dissipation area of the sheet-shaped body; the fourth interface is used for forming electric connection with pins of the diode. The utility model can be applied to different types of diodes by the design of the sheet and the multiple interfaces. Meanwhile, the heat dissipation assembly can be matched with the heat dissipation assembly to provide a good heat dissipation function for the junction box body.

Description

Electric conduction heat conduction piece and photovoltaic junction box thereof

Technical Field

The utility model relates to the technical field of junction boxes, in particular to an electric and heat conducting piece and a photovoltaic junction box thereof.

Background

The photovoltaic junction box is mainly used for connecting and protecting the photovoltaic battery pack, connecting the power generated by the photovoltaic battery pack with an external circuit and conducting the current generated by the photovoltaic battery pack. The photovoltaic battery pack is severely heated and damaged due to shielding under strong light, and some photovoltaic batteries which are loaded due to the fact that the photovoltaic battery pack cannot be illuminated. Therefore, the diode in the photovoltaic junction box is connected with the photovoltaic battery pack in parallel, and when a hot spot effect is generated, current can be output from the diode so as to protect the corresponding photovoltaic battery pack.

At present, a photovoltaic junction box on the market is not provided with a heat dissipation assembly inside the junction box body. Meanwhile, for the axial diode, the structure of the conductive connecting piece used by the axial diode is simpler. Therefore, most of the conductive connectors on the market are not suitable for the conductive and heat-conductive members with heat dissipation components and can be used for axial diodes, patch diodes and MOS tubes. For this purpose, an electrically and thermally conductive element and a photovoltaic junction box are proposed.

Disclosure of Invention

The utility model aims to provide an electric and heat conducting piece and a photovoltaic junction box thereof, so as to solve the problems in the background art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides an electrically and thermally conductive piece can electrically and thermally conduct, and is used for photovoltaic terminal box, includes the slice body, the slice body is sheet structure, just be provided with four connection interfaces on the slice body, it is first interface, second interface, third interface and fourth interface respectively, wherein: the first interface is used for forming electrical connection with the cable; the second interface is used for forming electric connection with the bus bar; the third interface is used for forming heat conduction connection with a heat dissipation assembly, and the heat dissipation assembly is used for increasing the heat dissipation area of the sheet-shaped body; the fourth interface is used for forming electric connection with pins of the diode.

In this technical scheme, preferably, the slice body is rectangle sheet structure, just the slice body has six faces, and it is relative front and back, relative first side and second side, relative third side and fourth side respectively, be provided with on the first side of slice body to keeping away from the connection piece that the second side direction extends, the connection piece is curled from both sides to the centre and is formed tubular structure, tubular structure is first interface.

In this technical scheme, preferably, the second interface is a converging hole penetrating through the sheet-shaped body along the thickness direction of the sheet-shaped body.

In this technical scheme, preferably, the third side or the fourth side of the sheet-shaped body is a third interface; the second side of the sheet-shaped body is a fourth interface.

In the technical scheme, preferably, the flaky body is a copper sheet, and the thickness of the copper sheet is more than or equal to 0.2mm and less than or equal to 5.0mm.

Based on the above-mentioned electric conduction heat conduction piece, the utility model also provides a photovoltaic junction box, which comprises a junction box body, a diode, two electric conduction heat conduction pieces and two heat dissipation components, wherein the two electric conduction heat conduction pieces and the two heat dissipation components are all positioned in the junction box body; wherein: the diode is provided with a positive electrode pin and a negative electrode pin, the positive electrode pin is electrically connected with one of the electric conduction and heat conduction pieces, and the negative electrode pin is electrically connected with the other electric conduction and heat conduction piece; the two radiating assemblies are in one-to-one correspondence with the two electric conduction and heat conduction pieces, each radiating assembly is in heat conduction connection with the corresponding electric conduction and heat conduction piece, and the radiating assemblies are used for increasing radiating area.

In this technical scheme, preferably, the slice body with be formed with location structure between the terminal box body, location structure is used for carrying out the location to the place of slice body.

In this technical scheme, preferably, location structure includes: at least one positioning hole arranged on the sheet-shaped body, wherein the axial lead of the positioning hole is parallel to the thickness direction of the sheet-shaped body; and the positioning columns are in one-to-one correspondence with the positioning holes, are arranged in the junction box body and are matched with the positioning holes.

In the technical scheme, preferably, a limit structure is further formed between the sheet-shaped body and the junction box body, and the limit structure is used for limiting the sheet-shaped body and the junction box body to generate relative rotation around the axis of the positioning column.

In this technical scheme, preferably, limit structure includes: at least one limiting groove arranged on the flaky body; and the limit posts are in one-to-one correspondence with the limit grooves, are arranged in the junction box body, and are matched with the limit grooves.

Compared with the prior art, the utility model has the beneficial effects that:

the electric and heat conducting piece is applicable to different types of diodes through the design of the sheet shape and the multiple interfaces. Meanwhile, the heat dissipation assembly can be matched with the heat dissipation assembly to provide a good heat dissipation function for the junction box body. It was verified that the use of current of 20A to 35A was achieved when the photovoltaic junction box using this type of heat sink assembly employed 130 to 180 trench chips. Through simulation and calculation, the junction temperature of the photovoltaic junction box in the current mainstream design can be reduced to below 180 ℃ when hot spots occur by the design of the photovoltaic junction box.

Drawings

Fig. 1 is a perspective view of a photovoltaic junction box according to the present utility model;

fig. 2 is a perspective view of an electric and heat conducting member according to the present utility model;

fig. 3 is a top view of an electric and heat conductive member according to the present utility model.

In the figure: 1. a junction box body; 2. a diode; 4. an electrically and thermally conductive member; 41. a sheet-like body; 42. a sink aperture; 43. a cable trough; 44. positioning holes; 45. a limit groove; 5. and a heat dissipation assembly.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, in the description of the present utility model, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, it should be understood that the dimensions of the various elements shown in the figures are not drawn to actual scale, e.g., the thickness or width of some layers may be exaggerated relative to other layers for ease of description.

It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined or illustrated in one figure, no further detailed discussion or description thereof will be necessary in the following description of the figures.

As shown in fig. 1, the present utility model provides a technical solution: the utility model provides an electrically and thermally conductive spare, its can electrically and thermally conductive, and is used for photovoltaic terminal box, and it includes slice body 41, and slice body 41 is sheet structure, and is provided with four connection interfaces on the slice body 41, and it is first interface, second interface, third interface and fourth interface respectively. Wherein: the first interface is used for forming electric connection with the cable. The second interface is used for forming electric connection with the bus bar. The third interface is used for forming heat conduction connection with the heat dissipation component 5, and the heat dissipation component 5 is used for increasing the heat dissipation area of the sheet-shaped body 41. The fourth interface is used for forming electrical connection with the pins of the diode 2. By presetting a plurality of interfaces in the sheet-shaped body 41, the subsequent use of the electric and heat conducting member is facilitated. At the same time, the electric and heat conducting member can be applied to different types of diodes.

First, it should be clear that in the present utility model, the sheet-like body 41 may have any structure, and the shape thereof is not limited. As shown in fig. 2 and 3, in a preferred embodiment of the present utility model, the sheet-like body 41 is a rectangular sheet-like structure, and the sheet-like body 41 has six faces, which are respectively opposite front and back faces, opposite first and second side faces, and opposite third and fourth side faces, and the first side face of the sheet-like body 41 is provided with a connecting sheet (not shown) extending in a direction away from the second side face, and the connecting sheet is curled from two sides to the middle to form a tubular structure, i.e., a first interface. Of course, in other embodiments of the utility model, the cable slot 43 may be opened on the first side of the sheet-like body 41. The sheet-like body 41 is welded to the cable through the cable groove 43. The second interface is a bus hole 42 formed on the sheet-shaped body 41, and the bus hole 42 penetrates the sheet-shaped body 41 along the thickness direction of the sheet-shaped body 41. It should be clear that in use, the bus bar is passed through the busbar aperture 42 and then the first end of the bus bar is bent and welded to the sheet-like body 41. This connection makes the connection between the bus bar and the sheet-like body 41 more stable and less prone to separation. And the third interface is the third side or the fourth side of the sheet-like body 41. The fourth interface is a second side of the sheet-like body 41. In use, the heat sink assembly 5 is welded to the third or fourth side. The pins of the diode 2 are soldered to the second side. If necessary, a socket may be formed on the second side, the third side, or the fourth side, and pins of the heat dissipation assembly 5 or the diode 2 may be inserted into the socket and connected by crimping.

Meanwhile, it is clear that the sheet-like body 41 needs to exert conductive performance. Therefore, it may be any material capable of conducting electricity, and the specific material is not limited. Copper is not only conductive but also has a small electrical resistance, and generates less heat when in use, so copper flakes are preferred as the sheet-like body 41 in the present utility model. Meanwhile, in other embodiments of the present utility model, the thickness of the copper sheet is 0.2mm or more and 5.0mm or less. Specifically, it may be any thickness of 0.2mm, 0.5mm, 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm, 4.5mm and 5.0mm, or any thickness between the adjacent thicknesses.

Based on the electric conduction and heat conduction piece, the utility model further provides a photovoltaic junction box. The photovoltaic junction box proposed in the present utility model is shown in fig. 1. The photovoltaic junction box comprises a junction box body 1, a diode 2, two electric conduction and heat conduction pieces 4 and two heat dissipation components 5, wherein the diode 2, the two electric conduction and heat conduction pieces 4 and the two heat dissipation components 5 are all located in the junction box body 1. Wherein: the diode 2 has a positive electrode pin and a negative electrode pin, the positive electrode pin is electrically connected with one of the conductive and heat conductive members 4, and the negative electrode pin is electrically connected with the other conductive and heat conductive member 4. The two heat dissipation components 5 are in one-to-one correspondence with the two electric conduction and heat conduction pieces 4, each heat dissipation component 5 is in heat conduction connection with the corresponding electric conduction and heat conduction piece 4, and the heat dissipation components 5 are used for increasing heat dissipation area. In the prior art, heat dissipation is mainly performed by means of the heat conduction and electric conduction sheet 4, and the heat dissipation capacity is limited. And the heat dissipation capacity of the heat dissipation assembly 5 is improved by adding the heat dissipation assembly.

It should be clear that in the production of the photovoltaic junction box of the present utility model, the diode 2, the two electrically and thermally conductive members 4 and the two heat dissipation members 5 are all required to be placed in the junction box body 1. The bus bar, the cable, the diode 2 and the heat dissipation assembly 5 are then connected to the electrically and thermally conductive member 4, respectively, by means of a tool. Therefore, in order to further improve the practical performance of the electric and heat conducting piece. A positioning structure is formed between the sheet-like body 41 and the junction box body 1, and is used for positioning the placement position of the sheet-like body 41. It will be appreciated that the positioning structure may be any structure commonly used in the market for positioning products. In a preferred embodiment of the present utility model, as shown in fig. 2 and 3, the positioning structure includes: at least one positioning hole 44 arranged on the sheet-shaped body 41, the axial line of the positioning hole 44 is parallel to the thickness direction of the sheet-shaped body 41; the positioning columns are arranged in the junction box body 1 and are matched with the positioning holes 44 one by one. In use, the sheet-like body 41 is inserted onto the positioning post to achieve positioning.

Similarly, the sheet-like body 41 is prevented from rattling during the connection. A limiting structure is further formed between the sheet-shaped body 41 and the junction box body 1, and the limiting structure is used for limiting the sheet-shaped body 41 and the junction box body 1 to generate relative rotation around the axis of the positioning column. The limit structure can also be any structure commonly used in the market. In another specific embodiment of the present utility model, as shown in fig. 2 and 3, the limiting structure includes: at least one limiting groove 45 is formed on the sheet-shaped body 41. And the limit posts are arranged in the junction box body 1 and are matched with the limit grooves 45 one by one.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an electrically and thermally conductive spare, can electrically and thermally conductive, and is used for photovoltaic terminal box, its characterized in that includes slice body (41), slice body (41) are sheet structure, just be provided with four connection interfaces on slice body (41), it is first interface, second interface, third interface and fourth interface respectively, wherein:

the first interface is used for forming electrical connection with the cable;

the second interface is used for forming electric connection with the bus bar;

the third interface is used for forming heat conduction connection with a heat dissipation assembly (5), and the heat dissipation assembly (5) is used for increasing the heat dissipation area of the sheet-shaped body (41);

the fourth interface is used for forming electric connection with pins of the diode (2).

2. An electrically and thermally conductive member as claimed in claim 1, wherein said sheet-like body (41) has a rectangular sheet-like structure, and said sheet-like body (41) has six faces, which are respectively opposite front and back faces, opposite first and second side faces, opposite third and fourth side faces, and said sheet-like body (41) has a connecting piece provided on its first side face extending in a direction away from said second side face, said connecting piece being curled from both sides toward the middle to form a tubular structure, said tubular structure being the first interface.

3. An electrically and thermally conductive member according to claim 2, wherein said second interface is a bus hole (42) penetrating said sheet-like body (41) in a thickness direction of said sheet-like body (41).

4. A thermally and electrically conductive member according to claim 3, wherein the third side or the fourth side of said sheet-like body (41) is a third interface; the second side of the sheet-shaped body (41) is a fourth interface.

5. An electrically and thermally conductive member as claimed in claim 1, wherein said sheet-like body (41) is a copper sheet having a thickness of 0.2mm or more and 5.0mm or less.

6. A photovoltaic junction box, characterized by comprising a junction box body (1), a diode (2), two electrically and thermally conductive members (4) and two heat dissipation components (5) according to any one of claims 1 to 5, wherein the diode (2), the two electrically and thermally conductive members (4) and the two heat dissipation components (5) are all located within the junction box body (1); wherein:

the diode (2) is provided with a positive electrode pin and a negative electrode pin, the positive electrode pin is electrically connected with one of the electric conduction and heat conduction pieces (4), and the negative electrode pin is electrically connected with the other electric conduction and heat conduction piece (4);

the two radiating assemblies (5) are in one-to-one correspondence with the two electric conduction and heat conduction pieces (4), each radiating assembly (5) is in heat conduction connection with the corresponding electric conduction and heat conduction piece (4), and the radiating assemblies (5) are used for increasing the radiating area.

7. A photovoltaic junction box according to claim 6, characterized in that a positioning structure is formed between the sheet-like body (41) and the junction box body (1), said positioning structure being used for positioning the place of the sheet-like body (41).

8. The photovoltaic junction box of claim 7 wherein said positioning structure comprises:

at least one positioning hole (44) arranged on the sheet-shaped body (41), wherein the axial line of the positioning hole (44) is parallel to the thickness direction of the sheet-shaped body (41);

and the positioning columns are arranged in the junction box body (1) and are matched with the positioning holes (44) one by one.

9. A photovoltaic junction box according to claim 8, wherein a limit structure is further formed between the sheet-like body (41) and the junction box body (1), said limit structure being used to limit the relative rotation between the sheet-like body (41) and the junction box body (1) about the axis of the positioning post.

10. The photovoltaic junction box of claim 9, wherein said spacing structure comprises:

at least one limit groove (45) arranged on the sheet-shaped body (41);

and the limit posts are in one-to-one correspondence with the limit grooves (45), are arranged in the junction box body (1), and are matched with the limit grooves (45).