CN114884460A

CN114884460A - Photovoltaic junction box

Info

Publication number: CN114884460A
Application number: CN202210624134.5A
Authority: CN
Inventors: 乔强; 衣扬; 杨洪生; 张强; 许高飞
Original assignee: Hebei Branch Of Huaneng New Energy Co ltd
Current assignee: Hebei Branch Of Huaneng New Energy Co ltd
Priority date: 2022-06-02
Filing date: 2022-06-02
Publication date: 2022-08-09

Abstract

The invention discloses a photovoltaic junction box, which relates to the technical field of photovoltaic power generation and comprises a box body, a box cover, a terminal assembly, a patch diode, a placing frame and a wiring assembly, wherein the box cover is installed on the box body, the bottom end of the box body is provided with a clamping table, a clamping groove is formed in the clamping table, the bottom end of the placing frame is correspondingly provided with a first clamping head, the placing frame is clamped in the clamping groove through the first clamping head, one side of the clamping table is provided with a mounting groove, the wiring assembly is arranged in the mounting groove, the other side of the clamping table is provided with a wiring terminal, the top end of the wiring column is provided with a second clamping head, the terminal assembly is clamped at the top end of the placing frame, the terminal assembly is provided with the first wiring head and the second wiring head, the first wiring head is fixedly connected with the wiring assembly, the second wiring head is clamped on the second clamping head, and the patch diode is arranged between adjacent terminal assemblies. The invention has simple structure, low manufacturing cost and good heat resistance.

Description

Photovoltaic junction box

Technical Field

The invention belongs to the technical field of photovoltaic power generation, and particularly relates to a photovoltaic junction 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. The power generated by the solar cell module is connected with an external circuit through the junction box, namely, the module outgoing line is connected with an internal circuit of the junction box, and the internal circuit of the junction box is connected with an external circuit. And in the process of the work of the junction box, reverse current can be generated in the junction box, so that the diode generates heat, the temperature in the junction box is increased, and the junction box and components in the junction box can be influenced for a long time, so that the junction box is damaged.

Therefore, how to provide a photovoltaic junction box which can quickly dissipate heat and avoid the high temperature generated by the diode from burning the box body becomes a problem to be solved by technical personnel in the field.

Disclosure of Invention

In view of the above, the invention provides a photovoltaic junction box, which is simple in structure, and the terminal assembly is suspended and matched with a radiating fin for radiating, so that the radiating and the rapid heat transfer of the photovoltaic junction box are realized, and the reliability of the junction box is improved.

In order to achieve the purpose, the invention adopts the following technical scheme: comprises a box body, a box cover, a terminal component, a patch diode, a placing frame and a wiring component, wherein the box cover is arranged on the box body, the bottom end of the box body is provided with a clamping table, the clamping table is provided with a clamping groove, the bottom end of the placing frame is correspondingly provided with a first clamping head, the placing frame is clamped in the clamping groove through a first clamping joint, one side of the clamping table is provided with an installation groove, the wiring assembly is arranged in the mounting groove, the other side of the clamping table is provided with a wiring terminal, the top end of the wiring terminal is provided with a second clamping head, the terminal component is clamped at the top end of the placing frame and is provided with a first connector lug and a second connector lug, the first connector lug is fixedly connected with the connector lug assembly, the second connector lug is clamped on the second clamping connector lug, and the patch diode is arranged between adjacent terminal assemblies.

Further, the wiring subassembly includes joint box, pressing wire frame, compression spring and activity clamp plate set up in the pressing wire frame, compression spring's one end and pressing wire frame fixed connection, compression spring's the other end and activity clamp plate fixed connection, the pressing wire frame sets up in the joint box, one side that the activity clamp plate was kept away from to the pressing wire frame is provided with first wiring hole.

Further, the mounting groove both ends are provided with L type joint, the both ends bottom correspondence of joint box is provided with the joint boss.

Furthermore, two curb plates of joint box set up the rectangular channel that runs through, one side that the joint box is close to the movable clamp plate is provided with the first connector lug mounting groove of installing with first connector lug cooperation, one side that the movable clamp plate was kept away from to the joint box is provided with second wiring hole.

Furthermore, a clamping plate is arranged on one side of the placing frame, and the terminal component is correspondingly provided with a limiting hole.

Furthermore, a heat dissipation groove is formed in the top end of the box cover, and a waterproof breathable film covers the heat dissipation groove.

Furthermore, the radiating fins are installed below the radiating grooves, elastic components are arranged at four corners of each radiating fin, each elastic component comprises a first sleeve, a second sleeve and a flexible spring, the first sleeve is fixedly connected with the box cover, one end of the second sleeve is slidably sleeved in the first sleeve, the other end of the second sleeve is fixedly connected with the radiating fins, and the flexible springs are arranged in the first sleeve and the second sleeve.

Furthermore, step drain holes are formed in corners of the bottom end of the box body.

Furthermore, one side of the box body is provided with a limiting groove, and a pressing block is arranged in the limiting groove.

Furthermore, a sealing groove is formed in the edge of the box body, and a sealing strip is correspondingly arranged on the edge of the box cover.

The invention has the beneficial effects that:

1. the box body is simple in structure, and the support frame and the wiring assembly are arranged at the bottom end of the box body in a clamping manner, so that the automatic assembly and maintenance are facilitated;

2. the terminal assembly is arranged in the junction box in a suspended mode, so that a good heat dissipation effect can be achieved, short circuit of a circuit caused by water entering the junction box can be avoided, meanwhile, the placing frame attached to the terminal assembly is made of heat-resistant materials, the cost of the junction box is reduced, and cost control is facilitated;

3. the arrangement of the waterproof breathable film and the radiating fins of the box cover is beneficial to the heat dissipation of the terminal assembly and the patch diode, the arrangement of the elastic assembly can ensure the adhesion of the radiating fins with the patch diode and the terminal assembly, further improve the heat dissipation of the junction box, and avoid the phenomenon that the radiating fins are directly adhered to the patch diode, the radiating fins expand when being heated and extrude the terminal assembly to deform, so that gaps are generated between the radiating fins and the patch diode to influence the heat dissipation, the waterproof breathable film and the sealing strips can play a good waterproof effect, and the stepped drain holes are convenient for the drainage of the junction box;

4. the arrangement of the wiring assembly controls the movable baffle plate to be connected with the terminal assembly through the spring, so that the installation of the bus bar and the connection of a circuit are facilitated.

Drawings

FIG. 1 is a schematic view of the main structure of the present invention.

FIG. 2 is a schematic view of the internal assembly of the case of the present invention.

FIG. 3 is a schematic diagram of the structure of the case according to the present invention.

FIG. 4 is a schematic view of the assembly of the card cage of the present invention.

Figure 5 is a schematic view of the rack assembly of the present invention.

Fig. 6 is a schematic structural diagram of a wire pressing frame according to the present invention.

Fig. 7 is a schematic view of the structure of the rack of the present invention.

FIG. 8 is a cross-sectional view of the stepped drain hole of the present invention.

Fig. 9 is a schematic view of the structure of the box cover of the present invention.

Fig. 10 is a sectional view of the elastic assembly of the cap of the present invention.

Wherein, 1-box body; 2-a box cover; a 3-terminal assembly; 4-a patch diode; 5, placing a rack; 6-sealing groove; 7-sealing strips; 8-waterproof breathable film; 9-a heat sink; 10-a first sleeve; 11-a second sleeve; 12-a flexible spring; 13-wiring holes; 14-a limiting groove; 15-a compression block; 16-step drain holes; 17-a clamping table; 18-a clamping groove; 19-a first bayonet joint; 20-mounting grooves; 21-a terminal post; 22-a second bayonet joint; 23-a first connector lug; 24-a second terminal; 25-a snap-fit box; 26-wire pressing frame; 27-a compression spring; 28-a movable platen; 29-L-shaped bayonet joint; 30-clamping a boss; 31-a rectangular groove; 32-a first lug mounting groove; 33-a first wiring hole; 34-a second wiring hole; 35-clamping plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "horizontal", "inner", "outer", "one side", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

As shown in figures 1-6, the invention discloses a photovoltaic junction box, which comprises a box body 1, a box cover 2, a terminal component 3, a chip diode 4, a placing frame 5 and a wiring component, wherein the edge of the box body 1 is provided with a sealing groove 6, the edge of the box cover 2 is correspondingly provided with a sealing strip 7, the box cover 2 is arranged on the box body 1, the top end of the box cover 2 is provided with a heat dissipation groove, the heat dissipation groove is covered with a waterproof ventilated membrane 8, a heat dissipation fin 9 is arranged below the heat dissipation groove, one side of the heat dissipation fin 9 close to the heat dissipation groove is provided with a heat dissipation fin, four corners of the heat dissipation fin 9 are provided with elastic components, each elastic component comprises a first sleeve 10, a second sleeve 11 and a flexible spring 12, the first sleeve 10 is fixedly connected with the box cover 2, one end of the second sleeve 11 is slidably sleeved in the first sleeve 10, the other end of the second sleeve 11 is fixedly connected with the heat dissipation fin 9, the flexible spring 12 is arranged in the first sleeve 10 and the second sleeve 11, through elastic component's setting, can enough make things convenient for the laminating of terminal subassembly 3 in fin 9 and the box body 1, absorb the heat that terminal subassembly 3 produced, and dispel the heat through the radiating groove, can avoid again directly laminating fin 9 when paster diode 4, fin 9 thermal expansion, extrusion terminal subassembly 3 warp, cause fin 9 and paster diode 4 to produce the clearance, influence the heat dissipation, waterproof ventilated membrane 8 can enough keep the gas permeability of terminal box, can play fine water-proof effects again.

One side of the box body external connection line is provided with a connection hole 13, a limit groove 14 is arranged at the connection hole 13, a compression block 15 is arranged in the limit groove 14, the compression block 15 is used for fixing the external connection line and preventing the external connection line from being separated from the junction box under the action of external force, a step drain hole 16 is arranged at the corner of the bottom end of the box body 1, so that water can be conveniently and quickly drained after the box body 1 is filled with water, a clamping table 17 is arranged at the bottom end of the box body 1, a clamping groove 18 is arranged on the clamping table 17, a first clamping connector 19 is correspondingly arranged at the bottom end of the placing frame 5, the placing frame 5 is clamped in the clamping groove 18 through the first clamping connector 19, a mounting groove 20 is arranged at one side of the clamping table 17, the connection component is arranged in the mounting groove 20, a binding post 21 is arranged at the other side of the clamping table 17, a second clamping connector 22 is arranged at the top end of the binding post 21, a clamping plate 35 is arranged at one side of the placing frame 5, a limit hole is correspondingly arranged on the terminal component 3, terminal subassembly 3 is on rack 5 top through spacing hole joint, terminal subassembly 3 is provided with first connector lug 23 and second connector lug 24, first connector lug 23 and wiring subassembly fixed connection, second connector lug 24 joint is on second connector lug 22, chip diode 4 sets up between adjacent terminal subassembly 3, chip diode 4 and terminal subassembly 3 surface coating have heat conduction insulating cement, make things convenient for the laminating with fin 9, rack 5 in this embodiment is the modified polyphenyl ether material, high strength, outstanding electrical insulation nature and heat resistance have, difficult thermal deformation, put terminal subassembly 3 unsettled rack by rack 5, both avoided the contact of terminal subassembly 3 with the terminal box bottom, can play fine radiating effect, can avoid the terminal box again to intake the short circuit that causes the circuit.

The wiring assembly comprises a clamping box 25, a wire pressing frame 26, a compression spring 27 and a movable pressing plate 28, L-shaped clamping joints 29 are arranged at two ends of a mounting groove 20 of the junction box, clamping bosses 30 are correspondingly arranged at the bottoms of two ends of the clamping box 25, the clamping box 25 is mounted in the mounting groove 20 of the junction box through the clamping bosses 30, the wire pressing frame 26 is mounted in the clamping box 25, two side plates of the clamping box 25 are provided with through rectangular grooves 31, one side of the clamping box 25, which is close to the movable pressing plate 28, is provided with a first wire connector mounting groove 32, a first wire connector 23 is arranged in the first wire connector mounting groove 32 and is fixedly connected with the wire pressing frame 26, the compression spring 27 and the movable pressing plate 28 are arranged in the wire pressing frame 26, one end of the compression spring 27 is fixedly connected with the wire pressing frame 26, the other end of the compression spring 27 is fixedly connected with the movable pressing plate 28, the rectangular grooves 31 are arranged to facilitate the mounting of the bus bar, compression spring 27's setting is convenient to fix the busbar, and one side that movable clamp plate 28 was kept away from to wire pressing frame 26 is provided with first wiring hole 33, and one side correspondence that movable clamp plate 28 was kept away from to joint box 25 is provided with second wiring hole 34, makes things convenient for interconnecting link.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the technical scope of the present invention.

Claims

1. A photovoltaic junction box, its characterized in that: comprises a box body, a box cover, a terminal component, a patch diode, a placing frame and a wiring component, wherein the box cover is arranged on the box body, the bottom end of the box body is provided with a clamping table, the clamping table is provided with a clamping groove, the bottom end of the placing frame is correspondingly provided with a first clamping head, the placing frame is clamped in the clamping groove through a first clamping joint, one side of the clamping table is provided with an installation groove, the wiring assembly is arranged in the mounting groove, the other side of the clamping table is provided with a wiring terminal, the top end of the wiring terminal is provided with a second clamping head, the terminal component is clamped at the top end of the placing frame and is provided with a first connector lug and a second connector lug, the first connector lug is fixedly connected with the connector lug assembly, the second connector lug is clamped on the second clamping connector lug, and the patch diode is arranged between adjacent terminal assemblies.

2. The photovoltaic junction box of claim 1, wherein the wiring assembly comprises a clamping box, a wire pressing frame, a compression spring and a movable pressing plate, the compression spring and the movable pressing plate are arranged in the wire pressing frame, one end of the compression spring is fixedly connected with the wire pressing frame, the other end of the compression spring is fixedly connected with the movable pressing plate, the wire pressing frame is arranged in the clamping box, and a first wiring hole is formed in one side, away from the movable pressing plate, of the wire pressing frame.

3. The photovoltaic junction box of claim 2, wherein the mounting groove is provided with L-shaped clamping joints at two ends thereof, and the clamping bosses are correspondingly arranged at the bottoms of two ends of the clamping box.

4. The photovoltaic junction box of claim 2, wherein two side plates of the clamping box are provided with a rectangular groove therethrough, one side of the clamping box close to the movable pressing plate is provided with a first connector mounting groove matched with the first connector, and one side of the clamping box far from the movable pressing plate is provided with a second connector hole.

5. The photovoltaic junction box of claim 1, wherein a clamping plate is disposed on one side of the rack, and the terminal assembly is correspondingly disposed with a limiting hole.

6. The photovoltaic junction box of claim 1, wherein a heat sink is disposed at a top end of the box cover, and the heat sink is covered with a waterproof breathable film.

7. The photovoltaic junction box of claim 6, wherein a heat sink is mounted below the heat sink, and four corners of the heat sink are provided with elastic components, each elastic component comprises a first sleeve, a second sleeve and a flexible spring, the first sleeve is fixedly connected to the box cover, one end of the second sleeve is slidably sleeved in the first sleeve, the other end of the second sleeve is fixedly connected to the heat sink, and the flexible spring is disposed in the first sleeve and the second sleeve.

8. The photovoltaic junction box of claim 1, wherein stepped drainage holes are provided at bottom corners of the box body.

9. The photovoltaic junction box of claim 1, wherein a limiting groove is formed in one side of the box body, and a pressing block is arranged in the limiting groove.

10. The photovoltaic junction box of claim 1, wherein a sealing groove is formed in an edge of the box body, and a sealing strip is correspondingly arranged on an edge of the box cover.