CN212811633U

CN212811633U - Photovoltaic junction box

Info

Publication number: CN212811633U
Application number: CN202021269740.2U
Authority: CN
Inventors: 秦楠; 乔惠玲; 郑张安
Original assignee: JA Xingtai Solar Co Ltd
Current assignee: JA Xingtai Solar Co Ltd
Priority date: 2020-07-02
Filing date: 2020-07-02
Publication date: 2021-03-26
Anticipated expiration: 2030-07-02

Abstract

The utility model relates to a photovoltaic terminal box belongs to solar PV cell module technical field, has solved current terminal box and has easily appeared rosin joint phenomenon in welding process, and the terminal box bottom bonds insecurely with the backplate, and the problem that drops easily appears in the long-term use terminal box. The utility model comprises a box body, a bracket, a diode and a fulcrum; the bracket comprises a first outgoing line port and a second outgoing line port; the first outgoing line port comprises a first pin, the second outgoing line port comprises a second pin, and the first pin and the second pin are used for fixing and welding the outgoing line; the fulcrum is positioned at the bottom of the box body. The utility model arranges the pivot at the bottom of the box body, so that the junction box is evenly stressed when being installed, and the glue overflow is prevented from being uneven; the pins are arranged on the side faces of the ports of the outgoing lines, and the outgoing lines and the pins are welded during welding, so that cold joint is prevented.

Description

Photovoltaic junction box

Technical Field

The utility model relates to a solar PV cells subassembly technical field especially relates to a photovoltaic terminal box.

Background

The photovoltaic junction box is a connecting device between a solar cell array formed by solar cell modules and the solar charging control device, and is mainly used for connecting and protecting the solar cell modules, connecting electric power generated by the solar cells with an external circuit, conducting current generated by the photovoltaic modules and realizing power output. Because the outgoing line has certain tolerance and personnel misoperation in the production process of traditional solar cell module, the rosin joint is unusual can appear in the terminal box in welding process, causes the subassembly to reprocess in batches. In addition, the problem that glue overflows at two ends and is even and glue does not exist in the middle area easily occurs in the bonding process of the currently used junction box and the back plate, so that the junction box is easy to fall off when the assembly is located in an outdoor environment for a long time.

SUMMERY OF THE UTILITY MODEL

In view of the above analysis, the utility model aims at providing a photovoltaic terminal box can effectively reduce the terminal box rosin joint problem in solar energy component production process to improve the cohesiveness of terminal box and backplate.

The purpose of the utility model is mainly realized through the following technical scheme:

a photovoltaic junction box comprises a box body, a bracket, a diode and a fulcrum; the bracket comprises a first outgoing line port and a second outgoing line port; the first outgoing line port comprises a first pin, the second outgoing line port comprises a second pin, and the first pin and the second pin are used for fixing and welding the outgoing line; the fulcrum is positioned at the bottom of the box body.

Furthermore, the first lead-out port also comprises a first rectangular groove and a first bonding pad; the second outgoing line port further comprises a second rectangular groove and a second bonding pad; the first pin and the second pin can be bent towards the first bonding pad and the second bonding pad, and the bent first pin and the lead-out wire and the soldering tin on the first bonding pad can be welded together; the second pin can be welded with the outgoing line and the soldering tin on the second bonding pad after being bent.

Furthermore, the first pin is located on the side of the first outgoing line port, and the second pin is located on the side of the second outgoing line port.

Furthermore, the number of the fulcrums is 6, and the fulcrums are symmetrically arranged in the middle and at the two ends of the two sides of the bottom of the box body.

Furthermore, the bracket also comprises a rectangular copper sheet and a square copper sheet.

Furthermore, the rectangular copper sheet is connected with the first outgoing line port, and the square copper sheet is connected with the second outgoing line port.

Furthermore, the diode comprises an anode pin and a cathode pin, the anode pin is welded with the rectangular copper sheet, and the cathode pin is welded with the square copper sheet.

Furthermore, the bottom of the box body is of an open pore structure.

Further, the bottom of the box body is provided with an annular groove.

Furthermore, the first pin and the second pin are rectangular plates with grooves.

The utility model discloses can realize one of following beneficial effect at least:

(1) the utility model discloses a behind the terminal box installation lead-out wire, the lead-out wire welds with the pin, can effectively guarantee that soldering tin on lead-out wire, pin and the support fuses as an organic whole, prevents that the rosin joint from producing.

(2) The utility model discloses a terminal box bottom is equipped with six fulcrums, and six fulcrum symmetrical arrangement form a plane in the centre and both ends of the both sides of box body bottom, and it is even to make the terminal box beat the atress in the installation after gluing, and middle zone is the same with both sides volume of gluing, prevents that the terminal box overflows to glue inhomogeneous.

(3) The utility model discloses a simple structure of terminal box, convenient to use can use widely in the terminal box of different models.

The utility model discloses in, can also make up each other between the above-mentioned each technical scheme to realize more preferred combination scheme. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout the drawings.

Fig. 1 is an assembly view of a photovoltaic junction box according to an embodiment of the present invention;

fig. 2 is a bottom view of the photovoltaic junction box according to the embodiment of the present invention;

fig. 3 is an embodiment of a pin according to an embodiment of the present invention.

Reference numerals:

the circuit board comprises a box body 1, a groove 1a, a bracket 2, a rectangular copper sheet 2a, a square copper sheet 2b, a diode 3, an anode pin 3a, a cathode pin 3b, a first lead-out wire port 4a, a first rectangular groove 4b, a first bonding pad 4c, a first pin 5, a second lead-out wire port 5a, a second rectangular groove 5b, a second bonding pad 5c, a second pin 6.

Detailed Description

The following detailed description of the preferred embodiments of the invention, which is to be read in connection with the accompanying drawings, forms a part of the invention, and together with the embodiments of the invention, serve to explain the principles of the invention and not to limit the scope of the invention.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the term "connected" should be interpreted broadly, and may be, for example, a fixed connection, a detachable connection, an integrated connection, a mechanical connection, an electrical connection, a direct connection, or an indirect connection via an intermediate medium. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

An embodiment of the utility model discloses a photovoltaic terminal box, as shown in fig. 1-2, including box body 1, support 2, diode 3 and fulcrum 6, support 2 links together with diode 3, is located inside box body 1, and fulcrum 6 is located the 1 bottom outside of box body.

The box body 1 is a long strip-shaped frame structure with a cavity in the middle, semi-cylinders on two sides and a cuboid in the middle. The bottom of box body 1 is open pore structure, and the main function prevents that the terminal box from producing the heat gathering in the course of the work for the heat dissipation to burn out the terminal box. On the other hand, the open pore structure at the bottom of the box body 1 can enable silica gel to effectively flow to the bottom of the junction box when the silica gel is filled, the middle area of the bottom of the junction box can be effectively filled, and the silica gel has certain flame retardance, so that the possibility of burning out components in the region of the junction box can be reduced.

Six fulcrums 6 are symmetrically arranged at the bottom of the box body 1 along the outer edge, and the fulcrums 6 are round-dot bulges or cylinders. The 6 fulcrums 6 are symmetrically arranged at two sides of the box body 1, two ends of each side are respectively arranged, one fulcrum is arranged in the middle, and the six fulcrums 6 form a plane. Compare in the bottom and do not arrange the fulcrum, the design of fulcrum 6 of this embodiment can make the terminal box bottom beat glue abundant, avoids bonding the problem that the long-term use terminal box that leads to drops insecure. Compare in partial current design and only arrange fulcrum (4 fulcrums) at terminal box bottom both ends, the terminal box after the design of fulcrum 6 of this embodiment avoids beating to glue leads to the atress inhomogeneous because pressed in the installation, the mid portion undercut, both ends tilt up upwards to lead to silica gel can not evenly fill in the mid portion and the both ends of terminal box bottom, and then lead to terminal box bottom both ends overflow to glue evenly, the mid portion does not have to glue, the problem that drops easily appears in the long-term use terminal box.

The bottom of box body 1 still is equipped with annular groove 1a, and recess 1a arranges along the profile of box body 1 bottom, and recess 1a is used for depositing gluey when the encapsulating, and the bottom has sufficient glue when guaranteeing the terminal box bonding to guarantee terminal box and photovoltaic module's cohesiveness.

And a first lead-out port 4 and a second lead-out port 5 are arranged on the bracket 2, and the first lead-out port 4 and the second lead-out port 5 are respectively used for connecting the positive lead-out wire and the negative lead-out wire. The first outlet port 4 includes a first rectangular groove 4a, a first land 4b, and a first pin 4c, and the second outlet port 5 includes a second rectangular groove 5a, a second land 5b, and a second pin 5 c. The first rectangular groove 4a and the second rectangular groove 5a are through holes for respectively passing the lead wires of the positive electrode and the negative electrode. The first pad 4b and the second pad 5b are used for storing solder. First pin 4c and second pin 5c are the rectangle, are located the side of first outgoing line port 4 and second outgoing line port 5 respectively, and first pin 4c and second pin 5c can be buckled to first pad 4b and second pad 5b for fixed and welding outgoing line, buckle the back, and soldering tin on outgoing line, pin and the pad can weld together, can prevent the terminal box rosin joint. After the junction box is glued, the junction box is installed on the photovoltaic assembly, then the positive lead wire and the negative lead wire of the assembly penetrate out of the first rectangular groove 4a and the second rectangular groove 5a respectively, the lead wires are pressed towards two sides, and the first pin 4c and the second pin 5c are bent and fixed on the lead wires. And finally, soldering tin on the positive lead wire, the first pin 4c and the first pad 4b, soldering tin on the negative lead wire, the second pin 5c and the second pad 5b by using an electric soldering iron respectively, so that the lead wire, the pins and the soldering tin on the pads can be effectively integrated, and the generation of false soldering is prevented.

The bracket 2 also comprises a rectangular copper sheet 2a and a square copper sheet 2 b. The rectangular copper sheet 2a is connected with the first outgoing line port 4, and the rectangular copper sheet 2b is connected with the second outgoing line port 5.

The diode 3 includes a positive terminal 3a and a negative terminal 3 b. The positive electrode pin 3a is welded to the rectangular copper sheet 2a on the holder 2 so as to form a parallel line with the lead-out line of the first rectangular groove 4 a. The negative electrode pin 3b is welded with the square copper sheet 2b on the bracket 2, so as to form a parallel circuit with the outgoing line at the second rectangular groove 5 a.

The use method of the junction box comprises the following steps:

s1, automatically gluing the bottom edge of the junction box by using a glue injection machine, installing the junction box on the photovoltaic module after gluing is completed, and ensuring that glue overflowing from the edge of the junction box is uniform during installation.

S2, leading-out wires of the positive electrode and the negative electrode of the photovoltaic module penetrate out through the first rectangular groove 4a of the first leading-out wire port 4 and the second rectangular groove 5a of the second leading-out wire port 5 respectively, then the leading-out wires are pressed towards two sides, the first pin 4c and the second pin 5c are bent, and the leading-out wires are fixed on the leading-out wires.

S3, respectively welding the positive lead wire and the first pin 4c, the negative lead wire and the second pin 5c by using an electric soldering iron to ensure that the lead wires, the pins and soldering tin on the bonding pad are integrated and prevent the generation of insufficient soldering.

Preferably, the first leg 4c and the second leg 5c are rectangular plates with grooves, as shown in fig. 3. After the outgoing line is threaded out of the first rectangular groove 4a and the second rectangular groove 5a, the grooves of the first pin 4c and the second pin 5c are fixed on the first pin 4c and the second pin 5c, and then the outgoing line, the pins and the soldering tin are welded together, so that the welding reliability is further guaranteed, and the performance stability of the junction box is improved.

To sum up, the embodiment of the utility model provides a pair of photovoltaic terminal box, through setting up pin and fulcrum, this terminal box can effectively prevent the terminal box rosin joint in the use, improves the excessive gluey homogeneity, makes things convenient for staff's operation in the use. The utility model has the advantages of simple structure, convenient to use can promote in different model terminal boxes.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.

Claims

1. A photovoltaic junction box is characterized by comprising a box body (1), a support (2), a diode (3) and a fulcrum (6); the bracket (2) comprises a first outgoing line port (4) and a second outgoing line port (5); the first outgoing line port (4) comprises a first pin (4c), the second outgoing line port (5) comprises a second pin (5c), and the first pin (4c) and the second pin (5c) are used for fixing and welding outgoing lines; the fulcrum (6) is positioned at the bottom of the box body (1).

2. The photovoltaic junction box according to claim 1, characterized in that the first outlet port (4) further comprises a first rectangular groove (4a) and a first pad (4 b); the second outgoing line port (5) further comprises a second rectangular groove (5a) and a second pad (5 b); the first pin (4c) and the second pin (5c) can be bent towards the first pad (4b) and the second pad (5b), and the bent first pin (4c) can be welded with the outgoing line and soldering tin on the first pad (4 b); the second lead (5c) can be soldered to the lead wire and the solder on the second pad (5b) after being bent.

3. The photovoltaic junction box according to claim 1, characterized in that the first pin (4c) is located at the side of the first outlet port (4) and the second pin (5c) is located at the side of the second outlet port (5).

4. The photovoltaic junction box according to claim 1, characterized in that the number of the fulcrums (6) is 6 and symmetrically arranged in the middle and at the two ends of the bottom of the box (1).

5. The photovoltaic junction box according to claim 1, characterized in that the bracket (2) further comprises rectangular copper sheets (2a) and square copper sheets (2 b).

6. Photovoltaic junction box according to claim 5, characterized in that a rectangular copper sheet (2a) is connected to the first outlet port (4) and a square copper sheet (2b) is connected to the second outlet port (5).

7. The photovoltaic junction box according to claim 6, characterized in that the diode (3) comprises a positive pin (3a) and a negative pin (3b), the positive pin (3a) being welded to the rectangular copper sheet (2a) and the negative pin (3b) being welded to the square copper sheet (2 b).

8. The photovoltaic junction box according to claim 1, characterized in that the bottom of the box body (1) is of open-cell structure.

9. The photovoltaic junction box according to claim 1, characterized in that the bottom of the box (1) is provided with an annular groove (1 a).

10. The photovoltaic junction box according to claim 1, characterized in that the first leg (4c) and the second leg (5c) are rectangular plates with grooves.