CN210724685U

CN210724685U - Be applied to dual glass assembly's split type terminal box

Info

Publication number: CN210724685U
Application number: CN201922161029.9U
Authority: CN
Inventors: 段正刚
Original assignee: Suzhou QC Solar Co Ltd
Current assignee: Suzhou QC Solar Co Ltd
Priority date: 2019-12-05
Filing date: 2019-12-05
Publication date: 2020-06-09
Anticipated expiration: 2029-12-05

Abstract

The utility model provides a split type junction box applied to a dual-glass assembly, which comprises a left junction box, a middle junction box and a right junction box, and comprises a box cover, a box body, a first terminal and a second terminal which are arranged in the box body, and an axial diode which is electrically connected with the first terminal and the second terminal; the terminal is provided with a diode fixing sheet vertical to the plane of the terminal, the middle of the fixing sheet is provided with an axial diode pin positioning slot, and the plane adjacent to the fixing sheet on the terminal is provided with a convex structure in resistance welding with the diode pin; the middle position of the bottom of the box body is provided with a skirt structure protruding the edge of the box body. The junction box is characterized in that an axial diode with high overcurrent capacity is selected as a connecting diode between terminals in the wiring according to the characteristics of high power generation efficiency and high overcurrent of the double-glass assembly, and a corresponding structure which is convenient for fixing and welding the diode is designed, so that the volume of the junction box is small, the shielding of the assembly is reduced, and the material of the assembly is saved; the production process of the junction box is more efficient, the electrical safety coefficient of the junction box is high, and the capacity of overlarge current is strong.

Description

Be applied to dual glass assembly's split type terminal box

Technical Field

The invention relates to the technical field of solar photovoltaic power generation, in particular to a split type junction box applied to a novel double-glass photovoltaic assembly with high power generation efficiency.

Background

In order to solve the increasingly severe problem of environmental pollution caused by the use of traditional fossil energy, the green renewable energy industry has been rapidly developed in recent years, and a solar cell power generation technology for generating power by using the photovoltaic effect is an important green energy technology. The solar cell is made of materials capable of generating photovoltaic effect, such as silicon, gallium arsenide, indium selenium copper and the like, and can convert light energy into electric energy. At present, a photovoltaic module formed by combining a plurality of solar cells is widely applied to various photovoltaic power generation systems of buildings as a basic photovoltaic power generation unit, or a transparent film module is used as a curtain wall material of the buildings to build an energy-saving environment-friendly building. In order to improve the power generation efficiency per unit area, various photovoltaic modules with novel efficient structures are continuously developed and applied, for example, modules capable of generating power on two sides, shingle modules and the like are already in large-scale use.

In practical use, the junction box is required to lead out the electric energy generated by the photovoltaic module to be connected with an external load. Therefore, the photovoltaic module junction box is a key component of the photovoltaic module for constructing various power generation systems, and is generally directly attached to the surface of the module. For the novel double-glass photovoltaic module with higher power generation efficiency, the module is greatly influenced by the coverage of the box body area of the junction box, and the area of the module needs to be reduced as much as possible to reduce the influence on the power generation performance of the module; in addition, the problem that the junction box needs to meet the requirement of a high-power generation assembly for excessive current needs to be considered while the area of the junction box is reduced as much as possible; in addition, the processing process of the junction box during production of a production line also needs to be considered, so that the processing technology is simpler, more efficient and more environment-friendly, and the junction box and the assembly are more reliable and convenient to assemble.

Disclosure of Invention

According to the application requirement of the existing novel double-glass assembly with high power generation efficiency on the junction box, the invention aims to provide the novel split type junction box for the double-glass assembly, so that the volume of the junction box is reduced, the back surface of the assembly is arranged to reduce the back surface shielding of the assembly, and the power generation power of the assembly is increased; the assembly is reliable, and the over-current capability is strong.

In order to achieve the purpose of the invention, the split type junction box applied to the double-glass assembly comprises a left junction box, a middle junction box and a right junction box; the left junction box, the middle junction box and the right junction box respectively comprise box covers, box bodies, a first terminal and a second terminal which are arranged in the box bodies, and axial diodes which are electrically connected with the first terminal and the second terminal; diode fixing sheets vertical to the plane of the terminal are arranged on the first terminal and the second terminal, an axial diode pin positioning slot is arranged in the middle of each fixing sheet, and a protruding structure for resistance welding with the diode pin is arranged on the plane, adjacent to the fixing sheets, of the first terminal and the second terminal; and skirt structures protruding the edges of the box bodies are arranged at the middle positions of the bottoms of the left junction box body, the middle junction box body and the right junction box body.

Preferably, the end of the first terminal is provided with a cable fixing connection part which is in a U-shaped groove structure, and a slot is arranged in the middle of the U-shaped groove.

Preferably, the cable connecting part at one end of the left junction box body and the right junction box body, the arc surface at the other end of the left junction box body and the right junction box body, and the arc surfaces at two ends of the middle junction box body are respectively provided with a skirt structure.

Preferably, the middle part of the arc of one end of the box body of the middle junction box is provided with a protruding part.

Preferably, the box cover and the box body are combined in an embedded fixing mode.

Preferably, the connecting part of the cable and the junction box is provided with a buckle which is clamped with the cable connecting part, and the upper surface of the buckle is provided with a strip-shaped bulge which is welded with the cable connecting part by ultrasonic wave.

According to the novel split type junction box for the double-glass assembly, disclosed by the invention, aiming at the characteristics of high power generation efficiency and large overcurrent of the double-glass assembly, the axial diode with high overcurrent capacity is selected as the connecting diode between the terminals in the wiring, and a corresponding structure which is convenient for fixing and welding the diode is designed, so that the volume of the junction box is small, the shielding of the assembly is reduced, and the material of the assembly is saved; the production process of the junction box is more efficient, the electrical safety coefficient of the junction box is high, and the capacity of overlarge current is strong.

Drawings

The foregoing and other objects, features, and advantages of the invention will be apparent from the following detailed description taken in conjunction with the accompanying drawings. Wherein:

fig. 1 is an exploded view of a novel dual glass assembly split junction box according to an embodiment of the present invention;

fig. 2 is an exploded view of the left junction box of the split junction box of fig. 1;

fig. 3 is an exploded view of the middle junction box of the split junction box of fig. 1;

fig. 4 is an exploded view of the left terminal box of the split terminal box of fig. 1;

fig. 5 is a schematic view showing a connection structure of cables and a connector of the split junction box of fig. 1.

Wherein, the main parts and the reference numbers are as follows:

1-a box cover; 2-axial diode; 3-a first terminal; 4-a second terminal;

5-left box body; 6-middle box body; 7-right box body; 8-buckling; 9-a cable;

10-male connector; 11-female connector.

Detailed Description

The specific features and advantages of the invention are described in detail in connection with the accompanying drawings and the detailed description.

Referring to fig. 1 to 5, the split type junction box applied to the dual glass assembly according to an embodiment of the present invention includes a left junction box, a middle junction box, and a right junction box; the left junction box, the middle junction box and the right junction box respectively comprise a box cover 1, a box body 5, a first terminal 3 and a second terminal 4 which are arranged in the box body, and an axial diode 2 which is electrically connected with the first terminal 3 and the second terminal 4; referring to fig. 2, diode fixing sheets 301 perpendicular to the plane of the terminals are arranged on the first terminal 3 and the second terminal 4, a slot for positioning two pins of the axial diode 2 is arranged in the middle of the fixing sheet 301, and a protrusion structure 303 is arranged on the plane of the first terminal 3 and the second terminal 4 adjacent to the fixing sheet 301; by utilizing the process, the diode and the copper plate terminal can be combined and welded together through resistance, the pin of the diode is tightly attached to the copper plate, and the heat dissipation capability is strong; in the welding process, the heat is concentrated, the heating time is short, the welding deformation is small, and the influence on the diode chip is small; the welding mode of resistance welding adopts direct melting and combination of materials, does not need filling materials and solvents, does not need protective gas, and has high welding efficiency and good labor environment.

With reference to fig. 2, the end of the first terminal 3 is provided with a cable fixing connection portion 304 having a U-shaped groove structure, and a slot 305 is formed in the middle of the U-shaped groove, so that the riveting condition of the cable can be observed conveniently, and an additional soldering operation can be performed conveniently when the riveting condition is not good, so that the riveting place is divided into two parts with uniform stress, and the firmness is increased. The cable fixing connection parts 304 on the first terminals of the left junction box and the right junction box are respectively fixed with cables, and the cable fixing connection parts 304 on the first terminals in the middle junction box are generally not fixed with the cables.

Referring to fig. 2, 3 and 4, the middle positions of the bottoms of the left junction box case 5, the middle junction box case 6 and the right junction box case 7 are designed with

skirt structures

501, 601 and 701 protruding from the case edges; in a more preferred embodiment, skirt structures are arranged at the arc surfaces of the cable connecting parts 503 and 603 at one end and the other end of the left junction box case 5 and the right junction box case 7 and at the arc surfaces at two ends of the middle junction box case; through increasing the shirt rim in the box body bottom, on the one hand under the condition that does not occupy the effective generating area of subassembly, the area of contact of reasonable increase terminal box bottom and photovoltaic module improves the reliability that bonds, and on the other hand can make the electric factor of safety of terminal box improve, and too big electric current ability is stronger.

In another preferred embodiment, the arc middle part of one end of the box body of the middle junction box is provided with a protrusion 602, which can facilitate the positioning or holding of the junction box during the production process and the installation with the photovoltaic module.

In another preferred embodiment, the combination of the box cover and the box body adopts an embedded fixing mode, so that the height of the box body can be reduced.

Referring to fig. 1 and 5, a buckle 8 which is clamped with the cable connecting portions 503 and 603 is arranged at the joint of the cable and the junction box, and a strip-shaped protrusion 801 is arranged on the upper surface of the buckle 8, so that the buckle 8 and the cable connecting portions 503 and 603 are fixed together by ultrasonic welding, the cable cannot be pulled out or rotated, a complex connecting mode of a traditional nut locking cable is replaced, the process is simplified, and the connection is reliable.

The novel split type junction box for the double-glass assembly is characterized in that an axial diode with high overcurrent capacity is selected as a connecting diode between terminals in a wiring according to the characteristics of high power generation efficiency and high overcurrent, and a corresponding structure facilitating diode fixing and welding is designed, so that the novel split type junction box for the double-glass assembly is small in size, reduces assembly shielding and saves assembly materials. The diode and the copper plate terminal of the junction box are combined and connected together through resistance welding, and the pin of the diode is tightly attached to the copper plate, so that the heat dissipation capability is strong; in the welding process, the heat is concentrated, the heating time is short, the welding deformation is small, the influence on a diode chip is small, the welding mode adopts direct melting combination, filling materials and solvents are not needed, protective gas is not needed, the welding efficiency is high, and the labor environment is good; the axial diode is selected and connected with the copper plate terminal into a whole through resistance welding, so that the whole connection is compact, the volume is saved, and the whole junction box body is attractive and elegant; the box body base of terminal box increases the shirt rim structure, and terminal box electric safety coefficient is high, and too big electric current ability is strong. Through the reduction of whole volume, the terminal box dress shelters from for a short time at the subassembly back, can play the promotion subassembly generated power and save subassembly material cost purpose.

The present invention is not limited to the embodiments described above, and those skilled in the art may make modifications or changes within the scope of the disclosure without departing from the spirit of the present invention, so that the scope of the present invention is defined by the appended claims.

Claims

1. A split type junction box applied to a double-glass assembly is characterized by comprising a left junction box, a middle junction box and a right junction box; the left junction box, the middle junction box and the right junction box comprise box covers, box bodies, a first terminal and a second terminal which are arranged in the box bodies, and axial diodes which are electrically connected with the first terminal and the second terminal; diode fixing sheets vertical to the plane of the terminal are arranged on the first terminal and the second terminal, an axial diode pin positioning slot is arranged in the middle of each fixing sheet, and a protruding structure for resistance welding with the diode pin is arranged on the plane, adjacent to the fixing sheets, of the first terminal and the second terminal; and skirt structures protruding the edges of the box bodies are arranged at the middle positions of the bottoms of the left junction box body, the middle junction box body and the right junction box body.

2. The junction box of claim 1, wherein the first terminal has a cable fixing portion at an end thereof, which is formed in a U-shaped groove, and a groove is formed in a middle of the U-shaped groove.

3. The split type junction box applied to the dual glass assembly as claimed in claim 1 or 2, wherein skirt structures are provided at the arc surfaces of the cable connecting part and the other end of one end of the left junction box body and the right junction box body and at the arc surfaces of both ends of the middle junction box body.

4. The split junction box applied to the dual glass assembly as claimed in claim 3, wherein a protrusion is provided in the middle of the arc of one end of the box body of the middle junction box.

5. The split junction box applied to the dual glass assembly as claimed in claim 3, wherein the combination of the box cover and the box body adopts an embedded fixing mode.

6. The split type junction box applied to the dual glass assembly as claimed in claim 3, wherein a buckle is provided at a joint of the cable and the junction box, the buckle being engaged with the cable connection portion, and a strip-shaped protrusion ultrasonically welded to the cable connection portion is provided on an upper surface of the buckle.