CN211296677U - Photovoltaic junction box - Google Patents
Photovoltaic junction box Download PDFInfo
- Publication number
- CN211296677U CN211296677U CN202020163921.0U CN202020163921U CN211296677U CN 211296677 U CN211296677 U CN 211296677U CN 202020163921 U CN202020163921 U CN 202020163921U CN 211296677 U CN211296677 U CN 211296677U
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- CN
- China
- Prior art keywords
- junction box
- photovoltaic
- box body
- insulating
- terminal box
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 229910052802 copper Inorganic materials 0.000 claims description 37
- 239000010949 copper Substances 0.000 claims description 37
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 36
- 239000002313 adhesive film Substances 0.000 claims description 8
- 239000000565 sealant Substances 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 2
- 238000005476 soldering Methods 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims 1
- 239000012528 membrane Substances 0.000 abstract description 12
- 238000005253 cladding Methods 0.000 abstract description 5
- 238000010248 power generation Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The utility model relates to a solar cell produces technical field, specifically discloses a photovoltaic terminal box. This photovoltaic terminal box includes terminal box body, conductive component, busbar and insulating glued membrane, and conductive component sets up in the terminal box originally internally, and the terminal box body sets up on photovoltaic module, is provided with the insulating contact surface between terminal box body and the photovoltaic module, and the one end of busbar is connected in conductive component, and the other end passes the insulating contact surface and is connected in photovoltaic module, and insulating glued membrane cladding is outside the busbar, and the one end and the contact surface contact of insulating glued membrane, the other end extend to the terminal box originally internally. Through the insulating glued membrane of cladding outside the busbar for can't climb out at the crossing point department electric current of busbar and insulating contact surface, then this photovoltaic terminal box's creepage distance has increased the tip of insulating glued membrane to the distance between the insulating contact surface, adopts this kind of mode, and this photovoltaic terminal box can shorten the width of terminal box body when guaranteeing the security, improves the generating efficiency.
Description
Technical Field
The utility model relates to a solar cell produces technical field, especially relates to a photovoltaic terminal box.
Background
Photovoltaic power generation is one of the main ways of utilizing solar energy at present, and has become a new industry which is generally concerned and intensively developed in all countries in the world due to the characteristics of cleanness, safety, convenience, high efficiency and the like of solar photovoltaic power generation. The solar cell is made of materials capable of generating photovoltaic effect, such as silicon, gallium arsenide 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 used for building various photovoltaic power generation systems or building curtain walls to build energy-saving and environment-friendly buildings.
In practical use, a photovoltaic junction box is needed to lead out electric energy generated by the photovoltaic module to be connected with an external load. With the application and the development of the double-sided assembly, in order to avoid the photovoltaic junction box from shielding the battery piece, the photovoltaic junction box used on two sides needs to be designed into a long strip shape so as to reduce the width of the photovoltaic junction box and improve the power generation efficiency. However, the existing photovoltaic junction box is limited by the structural design and the creepage distance, and the width of the photovoltaic junction box cannot be smaller than 30mm, so that a space with the width of 40mm needs to be reserved for installing the photovoltaic junction box when a photovoltaic module is designed, and the power generation efficiency is greatly reduced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a photovoltaic terminal box, this photovoltaic terminal box's width is less, and generating efficiency is higher.
As the conception, the utility model adopts the technical proposal that:
a photovoltaic junction box, comprising:
the photovoltaic junction box comprises a junction box body and a conductive assembly, wherein the conductive assembly is arranged in the junction box body, the junction box body is arranged on a photovoltaic assembly, and an insulating contact surface is arranged between the junction box body and the photovoltaic assembly;
one end of the bus bar is connected to the conductive assembly, and the other end of the bus bar penetrates through the insulating contact surface and is connected to the photovoltaic assembly;
and the insulating adhesive film is coated outside the bus bar, one end of the insulating adhesive film is in contact with the insulating contact surface, and the other end of the insulating adhesive film extends into the junction box body.
As a preferred scheme of the photovoltaic junction box, the conductive assembly comprises a copper sheet and a diode, the copper sheet is arranged in the junction box body, the diode is arranged on the copper sheet, and the copper sheet is connected with the bus bar.
As a preferable scheme of the photovoltaic junction box, the diode is a bridge diode.
As a preferable scheme of the photovoltaic junction box, one end of the bus bar located in the junction box body is welded on the welding disc of the copper sheet.
As a preferable scheme of the photovoltaic junction box, the number of the copper sheets is multiple, the copper sheets are arranged along the length direction of the junction box body, and two adjacent copper sheets are connected through a conducting wire.
As a preferable scheme of the photovoltaic junction box, the diodes are lapped on two adjacent copper sheets.
As a preferred scheme of the photovoltaic junction box, a wiring hole is formed in the junction box body, and the bus bar penetrates through the wiring hole.
As a preferred scheme of the photovoltaic junction box, the insulating glue film coated on the bus bar can be abutted against the hole wall of the wiring hole.
As a preferable scheme of the photovoltaic junction box, a sealant is arranged between the bottom of the junction box body and the photovoltaic module to form the insulating contact surface.
As a preferable scheme of the photovoltaic junction box, the outer surface of the junction box body is coated with an anticorrosive layer.
The utility model has the advantages that:
the utility model provides a photovoltaic junction box, which comprises a junction box body, a conductive component, a bus bar and an insulating adhesive film, wherein one end of the bus bar is connected with the conductive component, and the other end of the bus bar passes through an insulating contact surface to be connected with the photovoltaic component, so that electric energy generated by the photovoltaic component is led out and is connected with an external load to provide electric energy for the external load; through the insulating glued membrane of cladding outside the busbar, and the one end and the insulating contact surface contact of insulating glued membrane, the other end extends to the terminal box originally internally for current can't climb out in the nodical department electric current of busbar and insulating contact surface, then the creepage distance of this photovoltaic terminal box has increased the tip of insulating glued membrane to the distance between the insulating contact surface, adopts this kind of mode, this photovoltaic terminal box can be when guaranteeing the security, shortens the width of terminal box body, improves photovoltaic module's generating efficiency.
Drawings
Fig. 1 is a schematic structural diagram of a photovoltaic junction box provided in an embodiment of the present invention;
FIG. 2 is a cross-sectional view of FIG. 1 at A-A;
fig. 3 is a cross-sectional view of fig. 1 at B-B.
In the figure:
100-a photovoltaic module;
1-a junction box body; 11-a box body; 111-wiring holes; 12-box cover;
2-a bus bar; 3-insulating glue film;
4-a conductive component; 41-copper sheet; 42-a diode;
and 5-sealing glue.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. 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 of the structures related to the present invention are shown in the drawings, not all of the structures.
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", "left", "right", and the like are used in the orientation or positional relationship 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 specific orientation, be constructed in a specific orientation, and be operated, 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.
As shown in fig. 1-3, the present embodiment provides a photovoltaic junction box, which includes a junction box body 1, a bus bar 2, an insulating film 3 and a conductive assembly 4, wherein the conductive assembly 4 is disposed in the junction box body 1, the junction box body 1 is disposed on the photovoltaic assembly 100, an insulating contact surface is disposed between the junction box body 1 and the photovoltaic assembly 100, one end of the bus bar 2 is connected to the conductive assembly 4, the other end of the bus bar passes through the insulating contact surface and is connected to the photovoltaic assembly 100, the insulating film 3 is wrapped outside the bus bar 2, one end of the insulating film 3 is in contact with the insulating contact surface, and the other end of the insulating film extends into the junction box body 1.
According to the photovoltaic junction box provided by the embodiment, the bus bar 2 is arranged, one end of the bus bar 2 is connected with the conductive component 4, and the other end of the bus bar 2 penetrates through the insulating contact surface to be connected with the photovoltaic component 100, so that electric energy generated by the photovoltaic component 100 is led out and is connected with an external load to provide electric energy for the external load; through the insulating glued membrane 3 of cladding outside busbar 2, and the one end and the insulating contact surface contact of insulating glued membrane 3, the other end extends to in the terminal box body 1, make the crossing point department electric current of busbar 2 and insulating contact surface can't climb out, then the creepage distance of this photovoltaic terminal box has increased the tip of insulating glued membrane 3 to the distance between the insulating contact surface, adopt this kind of mode, this photovoltaic terminal box can be when guaranteeing the security, shorten the width of terminal box body 1, improve photovoltaic module 100's generating efficiency.
Specifically, the creepage distance L refers to the shortest distance between two conductive parts measured along the insulating surface. Specifically, as shown in fig. 3, if the bus bar 2 is not covered with the insulating adhesive film 3, the creepage distance L' of the photovoltaic junction box is L2. In the embodiment, the bus bar 2 is coated with the insulating film 3, so that the current cannot climb out at the intersection point of the bus bar 2 and the insulating contact surface, and the current needs to climb to the end of the insulating film 3 first, at this time, the creepage distance L of the photovoltaic junction box is L1+ L2. Therefore, the creepage distance of the photovoltaic junction box provided by the embodiment is increased. In order to ensure the safety of the photovoltaic junction box in the using process, the creepage distance of the photovoltaic junction box has certain requirements, and compared with the creepage distance L 'of the photovoltaic junction box in the prior art, the creepage distance L of the photovoltaic junction box provided by the embodiment is L-L' ═ L1, so that the width of the photovoltaic junction box can be shortened by L1, the requirement of the photovoltaic junction box on the creepage distance can be met, and the power generation efficiency of the photovoltaic module is improved.
Note that the power generation efficiency is equal to the total amount of power generation divided by the projected area of the junction box body 1 on the horizontal plane.
Further, the conductive member 4 includes a copper sheet 41 and a diode 42, the copper sheet 41 is disposed in the junction box body 1, the diode 42 is disposed on the copper sheet 41, and the copper sheet 41 is connected to the bus bar 2. In the present embodiment, the copper sheet 41 serves as a conductive member, and the bus bar 2 conducts electricity on the photovoltaic module 100 to the copper sheet 41 and to the diode 42 through the copper sheet 41. In addition, the copper sheet 41 can also be used as a heat dissipation member, the diode 42 can generate a large amount of heat when in use, the heat dissipation effect of the copper sheet 41 is good, and the heat generated by the diode 42 can be dissipated in time, so that the normal use of the diode 42 is not affected.
Further, the number of the copper sheets 41 is multiple, the copper sheets 41 are arranged along the length direction of the junction box body 1, and two adjacent copper sheets 41 are connected through a conductive wire. The plurality of copper sheets 41 are arranged along the length direction of the junction box body 1, and compared with the prior art in which the plurality of copper sheets 41 are distributed in an array, the size of the junction box body 1 in the width direction can be further reduced. Specifically, one end of the bus bar 2 located inside the junction box body 1 is soldered to the soldering land of the copper sheet 41.
Preferably, in the present embodiment, the diode 42 is a bridge diode, which has a smaller volume and is more suitable for the junction box body 1 with a smaller width than the patch diode in the prior art.
Further, in the prior art, the copper sheets 41 and the diodes 42 are arranged side by side, while in the present embodiment, the diodes 42 are lapped on two adjacent copper sheets 41, and the size of the copper sheets 41 in the width direction is reduced compared with the prior art, so that the size of the junction box body 1 is further reduced, and the power generation efficiency is improved.
Furthermore, a wiring hole 111 is formed in the junction box body 1, and the bus bar 2 is inserted into the wiring hole 111. Preferably, the insulating glued membrane 3 of cladding on the busbar 2 can with the pore wall looks butt of wiring hole 111, on the one hand, can prevent that external dust, aqueous vapor etc. from entering into the inside of terminal box body 1 from wiring hole 111, on the other hand, can also prevent that busbar 2 from taking place to buckle, when this photovoltaic terminal box encapsulating is sealed, busbar 2 produces the easy gassing of the part of buckling, leads to sealed effect poor, influences this photovoltaic terminal box's life.
Preferably, a sealant 5 is arranged between the bottom of the junction box body 1 and the photovoltaic module 100 to form an insulating contact surface, so that the creepage distance of the photovoltaic junction box can be increased, and meanwhile, external dust, moisture and the like are further prevented from entering the junction box body 1 from the wiring hole 111, and the use safety of the photovoltaic junction box is ensured.
Further, the junction box body 1 comprises a box body 11 and a box cover 12, the box cover 12 can be covered on the box body 11, and one end of the box cover 12 is hinged to the box body 11. The one end of lid 12 is moved to the operating personnel board and makes the relative box body 11 rotation of lid 3, just can open lid 12, and convenient and fast can make operating personnel open lid 12 at any time, inspects the conductive component 4 etc. in the terminal box body 1 to ensure this photovoltaic terminal box's normal use.
Particularly, be fixed with the pivot in the one end of box body 11, on lid 12 was worn to locate by the pivot, lid 12 can revolve around the pivot to realize the articulated between lid 12 and the box body 11.
In order to prevent the photovoltaic junction box from being corroded on the surface due to being outdoors for a long time, in the embodiment, the outer surface of the junction box body 1 is coated with the anticorrosive layer, so that the corrosion resistance of the photovoltaic junction box can be improved, the service life of the photovoltaic junction box is prolonged, and the appearance of the photovoltaic junction box is attractive.
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 (10)
1. A photovoltaic junction box, comprising:
the photovoltaic junction box comprises a junction box body (1) and a conductive assembly (4), wherein the conductive assembly (4) is arranged in the junction box body (1), the junction box body (1) is arranged on a photovoltaic assembly (100), and an insulating contact surface is arranged between the junction box body (1) and the photovoltaic assembly (100);
a busbar (2) having one end connected to the conductive member (4) and the other end passing through the insulating contact surface and connected to the photovoltaic member (100);
and the insulating adhesive film (3) is coated outside the bus bar (2), one end of the insulating adhesive film (3) is in contact with the insulating contact surface, and the other end of the insulating adhesive film extends into the junction box body (1).
2. The photovoltaic junction box according to claim 1, characterized in that the conductive component (4) comprises a copper sheet (41) and a diode (42), the copper sheet (41) being arranged within the junction box body (1), the diode (42) being arranged on the copper sheet (41), the copper sheet (41) being connected to the busbar (2).
3. The photovoltaic junction box according to claim 2, characterized in that said diodes (42) are bridge diodes.
4. The photovoltaic junction box according to claim 2, characterized in that one end of the bus bar (2) inside the junction box body (1) is soldered to a soldering pad of the copper sheet (41).
5. The photovoltaic junction box according to claim 2, wherein the number of the copper sheets (41) is multiple, the copper sheets (41) are arranged along the length direction of the junction box body (1), and two adjacent copper sheets (41) are connected through a conductive wire.
6. The photovoltaic junction box according to claim 5, characterized in that the diodes (42) are lapped on two adjacent copper sheets (41).
7. The photovoltaic junction box according to claim 1, wherein the junction box body (1) is provided with a wiring hole (111), and the bus bar (2) is arranged in the wiring hole (111) in a penetrating manner.
8. The photovoltaic junction box according to claim 7, wherein the insulating film (3) coated on the bus bar (2) can abut against the wall of the wiring hole (111).
9. The pv junction box according to claim 1, characterized in that a sealant (5) is provided between the bottom of the box body (1) and the pv module (100) to form the insulating interface.
10. The photovoltaic junction box according to claim 1, characterized in that the outer surface of the junction box body (1) is coated with an anti-corrosion layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020163921.0U CN211296677U (en) | 2020-02-12 | 2020-02-12 | Photovoltaic junction box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020163921.0U CN211296677U (en) | 2020-02-12 | 2020-02-12 | Photovoltaic junction box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211296677U true CN211296677U (en) | 2020-08-18 |
Family
ID=72016044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020163921.0U Active CN211296677U (en) | 2020-02-12 | 2020-02-12 | Photovoltaic junction box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211296677U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023045945A1 (en) * | 2021-09-22 | 2023-03-30 | 福耀玻璃工业集团股份有限公司 | Unidirectional conductive joint assembly and photovoltaic sunroof mechanism |
| CN117792264A (en) * | 2024-02-27 | 2024-03-29 | 晶科能源(海宁)有限公司 | Junction box and photovoltaic module |
-
2020
- 2020-02-12 CN CN202020163921.0U patent/CN211296677U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023045945A1 (en) * | 2021-09-22 | 2023-03-30 | 福耀玻璃工业集团股份有限公司 | Unidirectional conductive joint assembly and photovoltaic sunroof mechanism |
| CN117792264A (en) * | 2024-02-27 | 2024-03-29 | 晶科能源(海宁)有限公司 | Junction box and photovoltaic module |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No. 199, deer mountain road, Suzhou high tech Zone, Jiangsu Province Patentee after: CSI Cells Co.,Ltd. Patentee after: Changshu Artes Sunshine Power Technology Co.,Ltd. Patentee after: Atlas sunshine Power Group Co.,Ltd. Address before: No. 199, deer mountain road, Suzhou high tech Zone, Jiangsu Province Patentee before: CSI Cells Co.,Ltd. Patentee before: Changshu Artes Sunshine Power Technology Co.,Ltd. Patentee before: CSI SOLAR POWER GROUP Co.,Ltd. |