CN212909433U

CN212909433U - Photovoltaic junction box

Info

Publication number: CN212909433U
Application number: CN202021659021.1U
Authority: CN
Inventors: 奚斌; 许浩良; 彭丽霞; 胡辉
Original assignee: Changshu Telian Precision Devices Co ltd; Atlas Sunshine Power Group Co Ltd
Current assignee: Changshu Telian Precision Devices Co ltd; Canadian Solar Inc
Priority date: 2020-08-11
Filing date: 2020-08-11
Publication date: 2021-04-06
Anticipated expiration: 2030-08-11

Abstract

The utility model belongs to the technical field of photovoltaic power generation, a photovoltaic terminal box is specifically disclosed. The photovoltaic junction box comprises a shell and a cover plate. The top and the bottom opening of casing, the inner chamber packing of casing has the sealant layer, and the liquid cooling board is installed to the bottom surface of sealant layer, and the liquid cooling board is used for cooling the electronic component who encapsulates in the sealant layer. The cover plate is provided with heat dissipation holes and covers the top of the shell. Electronic components in the photovoltaic junction box are cooled through the heat dissipation holes and the liquid cooling plate, and therefore heat dissipation efficiency of the photovoltaic junction box is improved. Moreover, the heat dissipation holes and the liquid cooling plate are distributed at the top and the bottom of the photovoltaic junction box, so that the heat dissipation of the electronic element is uniform, the internal temperature difference of the photovoltaic junction box is eliminated, and the stability and the reliability of the photovoltaic junction box are improved.

Description

Photovoltaic junction box

Technical Field

The utility model relates to a photovoltaic power generation technical field especially relates to a photovoltaic terminal box.

Background

The photovoltaic junction box is a connector between a solar cell array formed by the solar cell modules and the solar charging control device.

When the photovoltaic junction box is used, the terminals and the diodes and other electronic elements inside the photovoltaic junction box can generate heat. As the photovoltaic junction box passes larger and larger current, the heat productivity of the diode is gradually increased. When the heat productivity of the diode is overlarge and the heat dissipation efficiency of the shell of the photovoltaic junction box is low, the diode is easy to break down, and the safety of the photovoltaic junction box is damaged.

Meanwhile, the terminal and the diode generally have the phenomenon of uneven heat dissipation, which easily causes large temperature difference between the diode and the terminal and between different parts of the diode and the terminal, and influences the performance of the photovoltaic junction box.

Therefore, a photovoltaic junction box is needed, which can improve the heat dissipation efficiency of the photovoltaic junction box and realize uniform heat dissipation of the terminals and the diodes.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a photovoltaic terminal box to improve photovoltaic terminal box's radiating efficiency, and realize electronic component's even heat dissipation.

To achieve the purpose, the technical proposal adopted by the utility model is that:

a photovoltaic junction box, comprising:

the liquid cooling plate is used for cooling the electronic elements packaged in the sealing adhesive layer;

the cover plate is provided with heat dissipation holes and covers the top of the shell.

Preferably, the heat dissipation hole is filled with a heat conduction member made of a heat conduction material.

Preferably, the cover plate is further provided with a through hole communicated with the inner cavity of the shell, and a waterproof breathable film is installed in the through hole.

Preferably, the number of the heat dissipation holes is multiple, and the heat dissipation holes are arranged in a matrix.

Preferably, the bottom of the shell is provided with a plurality of ground posts which are distributed in a rectangular shape.

Preferably, the side wall of the shell is provided with a water inlet port and a water outlet port, and the water inlet port, the liquid cooling plate and the water outlet port are sequentially communicated to form a liquid cooling channel.

Preferably, a support plate is further packaged in the sealant layer, and the support plate is connected with the inner side wall of the shell; the electronic component is mounted on the support plate.

Preferably, the two opposite ends of the cover plate are provided with first buckles, and the top of the side wall of the shell is provided with a second buckle capable of being buckled with the first buckles.

Preferably, the cover plate is provided with a limiting groove, and the top of the side wall of the shell is also provided with a limiting part which can be clamped in the limiting groove.

Preferably, an indicator is arranged on the periphery of the housing, and the extending direction of the indicator is the positive direction of the current flowing through the photovoltaic junction box.

The utility model has the advantages that:

the utility model discloses a photovoltaic terminal box sets up the louvre on the apron to liquid cooling board is installed in the bottom surface of the sealing adhesive layer of packing in the casing. The electronic elements packaged in the sealant layer are cooled through the heat dissipation holes and the liquid cooling plate, so that the heat dissipation efficiency of the photovoltaic junction box is improved. Moreover, the heat dissipation holes and the liquid cooling plate are respectively distributed at the top and the bottom of the photovoltaic junction box, so that the heat dissipation of the electronic element is uniform, the internal temperature difference of the photovoltaic junction box is eliminated, and the performance of the photovoltaic junction box is improved.

Drawings

Fig. 1 is a schematic structural view of a photovoltaic junction box in one direction provided by the present invention;

fig. 2 is a schematic structural view of a photovoltaic junction box in another direction provided by the present invention;

fig. 3 is a schematic view illustrating the assembly of the terminal, the diode and the supporting plate provided by the present invention;

fig. 4 is a schematic structural diagram of a cover plate provided by the present invention;

fig. 5 is a schematic structural diagram of the housing provided by the present invention.

The component names and designations in the drawings are as follows:

1. a housing; 11. sealing the adhesive layer; 12. a liquid-cooled plate; 13. a water inlet port; 14. a water outlet port; 15. a second buckle; 16. a limiting part; 17. a ground pillar; 2. a cover plate; 21. heat dissipation holes; 22. a through hole; 23. a first buckle; 24. a limiting groove; 3. a terminal; 31. positioning holes; 4. a diode; 5. a support plate; 51. a positioning column; 6. an indicator.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

The traditional photovoltaic junction box has the phenomena of low heat dissipation efficiency and uneven heat dissipation in the using process. The temperature difference between the diode and the electronic elements such as the terminal and between different parts of the electronic elements is large, and the stable use of the photovoltaic junction box is influenced.

In order to solve the above technical problem, as shown in fig. 1 and fig. 2, the present embodiment discloses a photovoltaic junction box. The photovoltaic junction box comprises a housing 1 and a cover plate 2. The top and the bottom opening of casing 1, the inner chamber packing of casing 1 has sealant layer 11, and liquid cooling board 12 is installed to sealant layer 11's bottom surface, and liquid cooling board 12 is used for cooling the electronic component who encapsulates in sealant layer 11. The cover plate 2 is provided with a heat dissipation hole 21 and covers the top of the shell 1.

In this embodiment, the cover plate 2 is provided with the heat dissipation holes 21, and the liquid cooling plate 12 is mounted on the bottom surface of the sealant layer 11 filled in the housing 1, so that the electronic component can be cooled by heat dissipation through the heat dissipation holes 21 and the liquid cooling plate 12, thereby improving the heat dissipation efficiency of the photovoltaic junction box. Moreover, the heat dissipation holes 21 and the liquid cooling plate 12 are respectively distributed at the top and the bottom of the photovoltaic junction box, so that the heat dissipation of the electronic element is uniform, the internal temperature difference of the photovoltaic junction box is eliminated, and the performance of the photovoltaic junction box is improved.

Preferably, the heat dissipation holes 21 are filled with a heat conduction member made of a heat conduction material. In the present embodiment, the heat conductive member is preferably ceramic. Because the ceramic has higher heat conductivity coefficient, the heat dissipation efficiency of the cover plate 2 is improved. It is understood that the heat conducting member may also be a metal block with a high heat conductivity, such as an aluminum block or a copper block.

Preferably, the number of the heat dissipation holes 21 is plural, and the plural heat dissipation holes 21 are arranged in a matrix. The plurality of heat radiation holes 21 increase the heat radiation amount of the cover plate 2, contributing to the improvement of the heat radiation efficiency of the cover plate 2.

Further preferably, the heat dissipation holes 21 are circular holes. The processing and the manufacturing are convenient, and the production cost of the cover plate 2 is reduced. Of course, the heat dissipation hole 21 may also be a polygonal hole or an elliptical hole. Here, the specific number and size of the heat dissipation holes 21 are not particularly limited.

As shown in fig. 2, the cover plate 2 is further provided with a through hole 22 communicating with the inner cavity of the housing 1, and a waterproof breathable film is installed in the through hole 22. Because the heat generated by the electronic element is gathered in the inner cavity of the photovoltaic junction box, the internal and external pressure difference of the photovoltaic junction box is large, and the stable assembly of the shell 1 and the cover plate 2 is influenced. By arranging the through holes 22, the internal pressure and the external pressure of the photovoltaic junction box can be kept balanced. The waterproof breathable film is additionally arranged in the through hole 22, so that water or dust is prevented from entering the photovoltaic junction box, and the inner cavity of the photovoltaic junction box is kept in a dry and clean environment.

As shown in fig. 1 and 2, a water inlet 13 and a water outlet 14 are formed in the side wall of the housing 1, and the water inlet 13, the liquid cooling plate 12 and the water outlet 14 are sequentially communicated to form a liquid cooling channel.

In this embodiment, the liquid cooling plate 12 is disposed at the bottom of the sealant layer 11. In order to avoid collision of the liquid cooling plate 12 or interference with external objects, the end face of the liquid cooling plate 12 facing away from the sealant layer 11 is flush with the bottom end face of the housing 1. External cooling liquid flows through the liquid cooling plate 12 through the water inlet port 13 and flows out from the water outlet port 14 to cool the electronic components in the sealant layer 11.

As shown in fig. 2 and 3, the sealant layer 11 further encapsulates a support plate 5, and the support plate 5 is connected to the inner side wall of the case 1. Electronic components are mounted on the support plate 5. In the present embodiment, the electronic components are a terminal 3 and a diode 4 mounted on the terminal 3.

In the embodiment, the bottom opening of the photovoltaic junction box is filled with the sealant layer 11 in the inner cavity of the housing 1 to close the bottom opening, so that the weight of the photovoltaic junction box is reduced. The diode 4 is mounted on the terminal 3, the terminal 3 is mounted on the positioning column 51 of the supporting plate 5 through the positioning hole 31 of the terminal, and the supporting plate 5 is clamped and fixed with the inner wall of the shell 1. The assembled support plate 5, the terminals 3 and the diodes 4 are encapsulated by filling a sealant, and a sealant layer 11 is formed. Backup pad 5 not only can bear terminal 3 and diode 4 to can regard as sealant layer 11's skeleton, improved sealant layer 11's intensity and stability.

Preferably, the two opposite ends of the cover plate 2 are both provided with first buckles 23, and the top of the side wall of the housing 1 is provided with second buckles 15 capable of being buckled with the first buckles 23.

As shown in fig. 4 and 5, the cover plate 2 is provided with first buckles 23 at both ends in the length direction thereof, and each end is provided with two first buckles 23, so as to enhance the clamping strength of the cover plate 2 and the housing 1. The opposite two sides of the top of the shell 1 are correspondingly provided with second buckles 15. The first hook 23 is engaged with the corresponding second hook 15, whereby the cover 2 can be fitted to the top of the housing 1. In other embodiments, two, three, five or more than five first buckles 23 may be provided, and a plurality of first buckles 23 are distributed along the circumferential direction of the cover plate 2. The number of the second buckles 15 on the shell 1 is the same as that of the first buckles 23, and the second buckles and the first buckles are in one-to-one correspondence.

Preferably, the cover plate 2 has a limiting groove 24, and the top of the side wall of the housing 1 is further provided with a limiting portion 16 capable of being clamped in the limiting groove 24.

In this embodiment, the cover plate 2 has a limiting groove 24 at one end in the length direction, and the limiting groove 24 is located between the two first buckles 23. When the cover plate 2 is required to cover the casing 1, the limiting part 16 on the casing 1 is firstly clamped in the limiting groove 24 of the cover plate 2, so that the first buckle 23 and the corresponding second buckle 15 can be clamped quickly, and the assembly efficiency of the photovoltaic junction box is improved. Of course, the limiting groove 24 may also be located on the housing 1, and the limiting portion 16 extends from the outer periphery of the cover plate 2. Here, the structure and specific dimensions of the limiting groove 24 and the limiting portion 16 are not particularly limited.

As shown in fig. 1, 2 and 5, the outer periphery of the housing 1 is provided with an indicator 6, and the extending direction of the indicator 6 is the positive direction of the current flowing through the photovoltaic junction box, so that the diode 4 and the terminal 3 can be conveniently and correctly installed.

It is noted that the bottom of the housing 1 is provided with a plurality of ground posts 17 distributed in a rectangular shape. The plurality of ground posts 17 are used for supporting the housing 1, so that the housing 1 can be stably placed on an uneven supporting surface. Moreover, the ground pillar 17 can keep a certain gap between the bottom of the housing 1 and the bearing surface, which is beneficial to ventilation and heat dissipation of the bottom of the photovoltaic junction box.

The above embodiments have been described only the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and is not departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A photovoltaic junction box, comprising:

the electronic component packaging structure comprises a shell (1), wherein the top and the bottom of the shell (1) are provided with openings, an inner cavity of the shell (1) is filled with a sealant layer (11), a liquid cooling plate (12) is arranged on the bottom surface of the sealant layer (11), and the liquid cooling plate (12) is used for cooling an electronic component packaged in the sealant layer (11);

the heat dissipation device comprises a cover plate (2), wherein the cover plate (2) is provided with heat dissipation holes (21) and covers the top of the shell (1).

2. The photovoltaic junction box according to claim 1, characterized in that said heat dissipation holes (21) are filled with heat conducting members made of heat conducting material.

3. The photovoltaic junction box according to claim 2, wherein the cover plate (2) is further provided with a through hole (22) communicated with the inner cavity of the housing (1), and a waterproof breathable film is installed in the through hole (22).

4. The photovoltaic junction box according to claim 1, wherein the number of the heat dissipation holes (21) is plural, and the plural heat dissipation holes (21) are arranged in a matrix.

5. Photovoltaic junction box according to claim 1, characterized in that the bottom of the casing (1) is provided with a plurality of ground posts (17) distributed rectangularly.

6. The photovoltaic junction box according to claim 1, wherein a water inlet port (13) and a water outlet port (14) are formed in a side wall of the housing (1), and the water inlet port (13), the liquid cooling plate (12) and the water outlet port (14) are sequentially communicated to form a liquid cooling channel.

7. The photovoltaic junction box according to claim 1, characterized in that a support plate (5) is further encapsulated in the sealant layer (11), wherein the support plate (5) is connected with the inner side wall of the housing (1); the electronic component is mounted on the support plate (5).

8. The photovoltaic junction box according to claim 1, wherein the cover plate (2) is provided with first buckles (23) at two opposite ends, and the top of the side wall of the housing (1) is provided with second buckles (15) capable of being buckled with the first buckles (23).

9. The photovoltaic junction box according to claim 8, wherein the cover plate (2) has a limiting groove (24), and a limiting portion (16) capable of being clamped in the limiting groove (24) is further disposed on the top of the side wall of the housing (1).

10. The pv junction box according to claim 1, characterized in that the housing (1) is provided at its outer circumference with an indicator (6), the indicator (6) extending in the direction of the positive polarity of the current flowing through the pv junction box.