CN217037133U - A photovoltaic junction box - Google Patents

Abstract

The utility model provides a photovoltaic junction box, which comprises a box body, at least four conductive components arranged at intervals, at least three diode modules, and a heat dissipation component. The box body includes an upper cover and a lower cover that are closed with each other, and a placement cavity formed between the upper cover and the lower cover; at least four conductive components arranged at intervals are accommodated in the placement cavity; at least three diode modules are arranged in Between adjacent conductive components; the heat dissipation component includes a heat conduction cover, a heat conduction sheet and a heat dissipation structure, the heat conduction cover is arranged inside the placement cavity, the heat conduction sheet is arranged inside the placement cavity, and the heat dissipation structure It is arranged in the heat dissipation groove opened on the upper surface of the upper cover. By arranging a heat dissipation component on the photovoltaic junction box, the utility model can quickly conduct the heat generated by the diode from the inside of the photovoltaic junction box to the outside of the photovoltaic junction box, thereby greatly improving the heat dissipation efficiency of the photovoltaic junction box.

Description

A photovoltaic junction box

technical field

The utility model belongs to the field of photovoltaic technology, in particular to a photovoltaic junction box.

Background technique

The photovoltaic junction box mainly plays the role of electrical connection and protection in photovoltaic modules. On the one hand, the current generated by the photovoltaic module is introduced into the electrical equipment or the national grid to find that one, and on the other hand, the hot spot effect is placed through the bypass diode. It can prevent the solar cell and module packaging materials from being damaged by high temperature.

In order to reduce this type of damage, the photovoltaic junction box generally adopts the method of integrating bypass diodes. The diodes generate power consumption during operation, which will generate a lot of heat. The heat of the diode is dissipated to the inside of the junction box, and then dissipated to the outside through the box of the junction box. The efficiency of this heat dissipation method is too low, which will cause the diode to fail due to excessive temperature, affecting the normal operation of the photovoltaic module.

According to the technical problems existing in the prior art, the utility model provides a photovoltaic junction box.

Utility model content

Aiming at the technical problems existing in the prior art, the utility model provides a photovoltaic junction box, which has the characteristics of simple structure and good heat dissipation effect.

For realizing the above-mentioned purpose, the technical scheme that the utility model provides is as follows:

A photovoltaic junction box, including

a box body, including an upper cover and a lower cover that cover each other, and a placement cavity formed between the upper cover and the lower cover;

at least four conductive components arranged at intervals are accommodated inside the placement cavity;

at least three diode modules, the diode modules are electrically connected and arranged between adjacent conductive components;

A heat dissipation component, including a heat conduction cover, a heat conduction sheet and a heat dissipation structure,

The heat-conducting cover is arranged inside the placement cavity,

The thermally conductive sheet is arranged inside the placement cavity,

The heat dissipation structure is arranged in a heat dissipation groove opened on the upper surface of the upper cover.

Preferably, the cross-section of the thermally conductive cover is U-shaped, and the thermally conductive cover is covered above the diode module and the conductive assembly;

The heat-conducting sheet is connected and fixed to the heat-dissipating structure through a heat-conducting segment embedded in the upper cover, and

The heat-conducting sheet is located above the heat-conducting cover, and a heat-conducting silicone grease is arranged between the heat-conducting sheet and the heat-conducting cover.

Preferably, the heat dissipation structure includes

a heat sink, disposed at the bottom of the heat sink, and the heat sink has the same shape as the bottom surface of the heat sink; and,

The heat-dissipating ribs are arranged in an equidistant array on the upper surface of the heat-dissipating fins.

Preferably, the heat dissipation slot can be a cross structure.

Preferably, the anode and cathode of the diode modules are respectively connected to two adjacent conductive components, and the anode or cathode of one diode module is adjacent to the cathode or anode of an adjacent diode module, and the diode modules are connected in series.

Preferably, two electrical leads are also included, and the two electrical leads are respectively electrically connected to the conductive components disposed on the edge.

Preferably, the electrical leads include

electrical leads in electrical connection with the conductive components; and

A shielding layer, which is a metal mesh or metal foil, covers the electrical conductors;

an insulating protective layer covering the shielding layer.

Preferably, the electrical lead is woven from multiple strands of silver wire.

The positive effect that the utility model has:

By arranging a heat dissipation component on the photovoltaic junction box of the present invention, the heat generated during the operation of the diode can be quickly conducted from the inside of the photovoltaic junction box to the outside of the photovoltaic junction box. The method greatly improves the heat dissipation efficiency of the photovoltaic junction box, and prevents the diode module in the photovoltaic junction box from failing due to excessive temperature.

Description of drawings

In order to make the content of the present utility model easier to understand, the present utility model will be further described below according to specific embodiments and in conjunction with the accompanying drawings, wherein

1 is a schematic structural diagram of a photovoltaic junction box of the present invention;

2 is an exploded view of a photovoltaic junction box of the present invention;

FIG. 3 is a cross-sectional view taken along the line A in FIG. 2 .

Reference number:

1. Box body; 101. Upper cover; 102. Lower cover; 103. Placement cavity; 2. Conductive components; 3. Diode module; 4. Heat dissipation components; ;4031, heat sink; 4032, heat dissipation ridge; 404, heat dissipation segment; 5, heat dissipation slot; 6, electrical lead; 601, electrical wire; 602, shielding layer; 603, insulating protective layer;

Detailed ways

The concept, specific structure and technical effects of the present invention will be clearly and completely described below with reference to the embodiments and accompanying drawings, so as to fully understand the purpose, features and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, those skilled in the art can obtain other embodiments without creative work, All belong to the protection scope of the present invention. In addition, all the connection relationships mentioned in the text do not mean that the components are directly connected, but refer to a better connection structure that can be formed by adding or reducing connection accessories according to specific implementation conditions. Various technical features in the creation of the present invention can be combined interactively on the premise of not contradicting each other.

In the description of the present invention, it should be understood that the terms "portrait", "horizontal", "upper back", "left", "right", "vertical", "horizontal", "top", "bottom" ", "inside", "outside" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the indicated devices or elements must have The specific orientation, construction and operation in the specific orientation, therefore, should not be construed as a limitation of the present invention.

1-3 is a schematic structural diagram of a photovoltaic junction box of the present invention, including

The box body 1 includes an upper cover 101 and a lower cover 102 that cover each other, and a placement cavity 103 formed between the upper cover 101 and the lower cover 102;

At least four conductive components 2 arranged at intervals are accommodated inside the placement cavity 103;

At least three diode modules 3, the diode modules 3 are electrically connected and arranged between adjacent conductive components 2;

The heat dissipation assembly 4 includes a heat conducting cover 401, a heat conducting sheet 402 and a heat dissipation structure 403,

The heat conducting cover 401 is arranged inside the placing cavity 103,

The thermally conductive sheet 402 is disposed inside the placement cavity 103,

The heat dissipation structure 403 is disposed in the heat dissipation groove 5 formed on the upper surface of the upper cover 101 .

Further, the cross section of the thermally conductive cover 401 is U-shaped, and the thermally conductive cover 401 is covered above the diode module 3 and the conductive component 2;

The heat-conducting sheet 402 is connected and fixed to the heat-dissipating structure 403 through a heat-conducting segment 404 embedded in the upper cover 101 .

The thermally conductive sheet 402 is located above the thermally conductive cover 401 , and thermally conductive silicone grease is arranged between the thermally conductive sheet 402 and the thermally conductive cover 401 . Thermal efficiency.

Further, the heat dissipation structure 403 includes

The heat sink 4031 is disposed at the bottom of the heat sink 5, and the heat sink 4031 is in the same shape as the bottom surface of the heat sink 5; and,

The heat dissipation ribs 4032 are arranged in an equidistant array on the upper surface of the heat dissipation fin 4301 .

Further, the heat dissipation slot 5 may be a cross structure.

Further, the anode and cathode of the diode module 3 are respectively connected to two adjacent conductive components 2, and the anode or cathode of one diode module 3 is adjacent to the cathode or anode of the adjacent diode module 3, and the other are connected in series.

Further, two electrical leads 6 are also included, and the two electrical leads 6 are respectively electrically connected to the conductive components 2 arranged on the edge.

Further, the electrical leads 6 include

an electrical lead 601, which is electrically connected to the conductive component 2; and

The shielding layer 602, which is a metal mesh or metal foil, covers the electrical wires 601;

The insulating protective layer 603 covers the shielding layer 602 .

Further, the electrical lead 6 is woven from multiple strands of silver wire.

The preferred embodiments of the present utility model have been specifically described above, but the invention of the present utility model is not limited to the described embodiments, and those skilled in the art can make various equivalent modifications without departing from the spirit of the present utility model. Or alternatives, these equivalent modifications or alternatives are all included within the scope defined by the claims of the present application.

Claims (8)

1. A photovoltaic junction box, its characterized in that: comprises that

The box body (1) comprises an upper cover (101) and a lower cover (102) which are mutually covered, and a placing cavity (103) formed between the upper cover (101) and the lower cover (102);

at least four conducting components (2) which are arranged at intervals and are accommodated in the placing cavity (103);

the diode modules (3) are electrically connected and arranged between the adjacent conductive components (2);

the heat dissipation assembly (4) comprises a heat conduction cover body (401), a heat conduction sheet (402) and a heat dissipation structure (403),

the heat conduction cover body (401) is arranged inside the placing cavity (103),

the heat conducting sheet (402) is arranged inside the placing cavity (103),

the heat dissipation structure (403) is arranged in a heat dissipation groove (5) formed in the upper surface of the upper cover (101).

2. A photovoltaic junction box according to claim 1, wherein: the section of the heat conduction cover body (401) is U-shaped, and the heat conduction cover body (401) covers the diode module (3) and the conductive assembly (2);

the heat conducting fin (402) is connected and fixed with the heat radiating structure (403) through a heat conducting section (404) embedded in the upper cover (101),

the heat conducting fin (402) is positioned above the heat conducting cover body (401), and heat conducting silicone grease is arranged between the heat conducting fin (402) and the heat conducting cover body (401).

3. The photovoltaic junction box of claim 2, wherein: the heat dissipation structure (403) comprises

The heat radiating fins (4031) are arranged at the bottoms of the heat radiating grooves (5), and the shapes of the heat radiating fins (4031) are consistent with those of the bottom surfaces of the heat radiating grooves (5); and (c) a second step of,

and the heat dissipation convex strips (4032) are arranged on the upper surface of the heat dissipation fin (4031) in an equidistant array.

4. A photovoltaic junction box according to claim 3, wherein: the heat dissipation groove (5) can be of a cross structure.

5. The photovoltaic junction box of claim 1, wherein: the anode and the cathode of the diode module (3) are respectively connected with the two adjacent conductive components (2), the anode or the cathode of one diode module (3) is adjacent to the cathode or the anode of the adjacent diode module (3), and the diode modules (3) are connected in series.

6. The photovoltaic junction box of claim 1, wherein: the electric heating wire is characterized by further comprising two electric leads (6), wherein the two electric leads (6) are electrically connected with the conductive component (2) arranged on the edge respectively.

7. The photovoltaic junction box of claim 6, wherein: the electrical lead (6) comprises

An electrical lead (601) electrically connected to the conductive component (2); and

a shielding layer (602) which is a metal net or a metal foil and covers the electric lead (601);

an insulating protective layer (603) covering the shielding layer (602).

8. The photovoltaic junction box of claim 6, wherein: the electric lead (6) is woven by a plurality of strands of silver wires.

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