CN111769798A - Improved modularized photovoltaic assembly bypass element and assembly junction box - Google Patents
Improved modularized photovoltaic assembly bypass element and assembly junction box Download PDFInfo
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- CN111769798A CN111769798A CN202010742330.3A CN202010742330A CN111769798A CN 111769798 A CN111769798 A CN 111769798A CN 202010742330 A CN202010742330 A CN 202010742330A CN 111769798 A CN111769798 A CN 111769798A
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- conductive terminal
- bypass
- protruding part
- photovoltaic module
- bypass element
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- 238000004806 packaging method and process Methods 0.000 claims abstract description 6
- 238000003466 welding Methods 0.000 claims description 20
- 229910000679 solder Inorganic materials 0.000 claims 1
- 230000017525 heat dissipation Effects 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 239000004020 conductor Substances 0.000 description 6
- 238000012536 packaging technology Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/30—Electrical components
- H02S40/34—Electrical components comprising specially adapted electrical connection means to be structurally associated with the PV module, e.g. junction boxes
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/30—Electrical components
- H02S40/34—Electrical components comprising specially adapted electrical connection means to be structurally associated with the PV module, e.g. junction boxes
- H02S40/345—Electrical components comprising specially adapted electrical connection means to be structurally associated with the PV module, e.g. junction boxes with cooling means associated with the electrical connection means, e.g. cooling means associated with or applied to the junction box
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- 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
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- Photovoltaic Devices (AREA)
Abstract
The invention provides an improved modularized photovoltaic assembly bypass element which comprises a first conductive terminal, a bypass protection device packaging module and a second conductive terminal, wherein one end, extending into an insulating plastic-sealed body, of the second conductive terminal is provided with a first protruding part and a second protruding part, two bypass protection devices are respectively arranged on the first protruding part and the second protruding part, and the area ratio of the first protruding part to the second protruding part is 0.8-1.2. The modularized photovoltaic module bypass element adopts a double-diode chip design, so that the current carrying capacity and the heat dissipation capacity of the bypass element are enhanced; the areas of the two convex parts of the conductive terminals of the two diode chips are designed to be nearly equal or equal, so that the current carrying capacity and the heat dissipation capacity can be optimized; the modular design can avoid producing the binding post of multiple structure when the terminal box adds man-hour, saves extra stamping die's input to make things convenient for the management of spare part in the production process, save the cost raise the efficiency.
Description
Technical Field
The invention relates to the technical field of solar photovoltaic power generation, in particular to an improved modularized photovoltaic module bypass element and a photovoltaic module junction box with the same.
Background
The solar photovoltaic module is a device for converting solar energy into electric energy, and in the production process of the photovoltaic module, the junction box plays an important role in effectively outputting the photovoltaic electric energy and mainly plays a role in outputting current generated by the photovoltaic module and protecting the solar photovoltaic module. The current generated by each solar panel is relatively small, and a photovoltaic junction box is needed to electrically connect a plurality of solar panels together, so that the currents generated by the plurality of solar panels are converged together and output to form a photovoltaic system reaching a certain power generation capacity.
In practical use, the photovoltaic junction box is generally directly mounted on a corresponding solar panel (also called a photovoltaic module) and electrically connected with a bus bar of the solar panel, and a bypass protection device is arranged in the junction box. The photovoltaic junction box on the market at present sets up positive, negative conductive terminal in the box body, is connected with bypass diode or bypass integrated chip between positive, negative conductive terminal. Because the types and sizes of the photovoltaic modules are different, the specifications of the existing photovoltaic module junction box are also many, and shells, conductive terminals and the like with different specifications need to be produced, so that the production cost of the junction box is increased, the production efficiency is reduced, and cost reduction and efficiency improvement are not facilitated. In addition, the current photovoltaic module is developed towards a high-efficiency high-power module, such as a laminated tile module, a double-glass module, a double-sided module and the like, so that new requirements are brought to a junction box of key accessories of the photovoltaic module, for example, the overcurrent capacity of the junction box is stronger, and the junction box is suitable for large-current output; the size of the assembly needs to be reduced as much as possible, and the shielding influence on the surface of the assembly is reduced; because the passing current is large, the heating of the junction box is also large, and therefore the volume of the junction box is reduced as much as possible, and the junction box is ensured to have strong heat dissipation capacity; moreover, the production process of the junction box is simplified and efficient as much as possible, the reliability of the product is guaranteed, and the cost is saved.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides an improved modularized photovoltaic assembly bypass element which is used in a photovoltaic assembly junction box, saves the manufacturing cost, facilitates the management of parts and improves the production efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme:
an improved modularized photovoltaic module bypass element comprises a first conductive terminal, a bypass protection device packaging module and a second conductive terminal, wherein the bypass protection device packaging module is arranged between the first conductive terminal and the second conductive terminal and comprises an insulating plastic package body, a bypass protection device arranged inside the insulating plastic package body and an electric connecting sheet for connecting the bypass protection device and the conductive terminals, the inner ends of the first conductive terminal and the second conductive terminal are inserted into the insulating plastic package body, and the first conductive terminal and the second conductive terminal are respectively connected with two electrodes of the bypass protection device; the middle part of one end of the second conductive terminal extending into the insulating plastic package body is provided with a T-shaped groove rotating by 90 degrees to form a first groove for the bus belt to pass through, a second groove matched with the end part of the first conductive terminal, and a first protruding part and a second protruding part which are positioned at two sides of the second groove, and a third groove for the bus belt to pass through is arranged on the first conductive terminal close to the insulating plastic package body; the middle part of one end of the first conductive terminal extending into the insulating plastic package body is provided with a third protruding part, and the third protruding part is inserted into the second slot and has a gap with a set distance with the first protruding part and the second protruding part; the two bypass protection devices are respectively arranged on the first protruding part and the second protruding part and are electrically connected with the first protruding part and the second protruding part; the two ends of the electric connection sheet are respectively and electrically connected with the two bypass protection devices, and the middle of the electric connection sheet is connected with the third protruding part.
Preferably, the bypass protection device is a diode or an integrated circuit module.
Still preferably, the ratio of the areas of the first protrusion and the second protrusion for providing the bypass protection device is 0.8-1.2.
Still preferably, the ratio of the area of the first protrusion to the area of the second protrusion is 0.9 to 1.1.
Still preferably, the first protruding portion and the second protruding portion have the same area.
Preferably, the electrical connection sheet comprises two ends and a plane welding part positioned in the middle, and a convex part is arranged between the plane welding parts.
Further preferably, the width of the flat welding portion at both ends is smaller than the width of the projection.
Preferably, the end of the first conductive terminal and/or the second conductive terminal is provided with a cable riveting part.
Preferably, the first conductive terminal is provided with a first bus bar welding area; the second conductive terminal is provided with a second bus bar welding area.
According to another aspect of the invention, a photovoltaic module junction box is also provided, which includes a box body, a box cover, and the improved modular photovoltaic module bypass element disposed within the box body.
The improved modularized photovoltaic assembly bypass element has the advantages that the improved modularized photovoltaic assembly bypass element adopts the integrated packaging technology of the conductive terminals and the diodes, secondary switching is avoided, and the current carrying capacity and the heat dissipation capacity of the bypass element are enhanced by adopting the design of the double-diode chip; the areas of the two convex parts of the conductive terminals of the two diode chips are designed to be nearly equal or equal, so that the current carrying capacity and the heat dissipation capacity can be optimized; the modular design can avoid producing the binding post of multiple structure when the terminal box adds man-hour, saves extra stamping die's input to make things convenient for the management of spare part in the production process, save the cost raise the efficiency.
Drawings
FIG. 1 is a schematic perspective view of an improved modular photovoltaic module bypass element of the present invention;
fig. 2 is a schematic view of a copper frame construction of the modular photovoltaic module bypass element of fig. 1;
fig. 3 is a schematic plan view of the first and second conductive terminals of the modular photovoltaic module bypass element of fig. 1;
FIG. 4 is a schematic structural view of the second conductive terminal of FIG. 3;
FIG. 5 is a schematic view of the first conductive terminal of FIG. 3;
fig. 6 is a schematic structural diagram of an electrical connection sheet of the bypass device and the first and second conductive terminals.
In the figure, 10-first conductive terminal, 11-bus bar first slot, 12-bus bar welding area, 20-diode packaging module, 22-diode chip, 30-second conductive terminal, 31-bus bar first slot, 32-bus bar welding area, 302-electric connection sheet and 40-cable wire riveting part.
Detailed Description
In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.
Referring to fig. 1, an improved modularized photovoltaic module bypass element according to the present invention is shown in a schematic three-dimensional structure, where the modularized photovoltaic module bypass element includes a first conductive terminal 10, a diode package module 20 and a second conductive terminal 30, referring to fig. 2, the diode package module 20 is disposed between the first conductive terminal 10 and the second conductive terminal 30, the diode package module 20 includes an insulating plastic package body 21, a diode chip 22 disposed inside the insulating plastic package body 21, and an electrical connection sheet 302 connecting the diode chip and the conductive terminals, an inner end of the first conductive terminal 10 and an inner end of the second conductive terminal 30 are inserted into the insulating plastic package body 21, and the first conductive terminal 10 and the second conductive terminal 30 are respectively connected to a P pole and an N pole of the diode chip 22.
Referring to fig. 2 to 5, a T-shaped slot rotated by 90 degrees is formed in the middle of one end of the second conductive terminal 30 extending into the insulating plastic package body 21 to form a first slot 31 for passing a bus bar, a second slot 301 matched with the end of the first conductive terminal 10, and a first protrusion 303 and a second protrusion 304 located on two sides of the second slot 301; a third protrusion 101 is arranged in the middle of one end of the first conductive terminal 10 extending into the insulating plastic package body 21, and the third protrusion 101 is inserted into the second slot 301 and has a gap with a set distance with the first protrusion 303 and the second protrusion 304; the two diode chips 22 are respectively disposed on the first protruding portion 303 and the second protruding portion 304 and electrically connected to the first protruding portion 303 and the second protruding portion 304; the two ends of the electrical connection sheet 302 are electrically connected to the two diode chips, respectively, and the middle is connected to the third protrusion 101.
The invention adopts the integrated packaging technology of the conductive terminal and the diode, avoids secondary switching, enhances the conductivity of the diode, simplifies the process and reduces the volume of the modular photovoltaic bypass element; and two diode chip welding positions are formed on the second conductive terminal, and a double-diode chip is adopted in the modularized photovoltaic assembly bypass element, so that the current-carrying capacity of the bypass element can be increased, the heat dissipation performance is improved, and the application requirement of a high-power photovoltaic assembly is met.
In a preferred embodiment, the ratio of the areas of the first protrusion 303 and the second protrusion 304 for attaching or welding the diode chip is 0.8-1.2; in a more preferred embodiment, the ratio of the area of the first protrusion 303 to the second protrusion 304 is 0.9 to 1.1; preferably, the first protrusion 303 and the second protrusion 304 have the same area.
Referring to the schematic structural diagram of the electrical connection sheet 302 shown in fig. 6, it includes plane welding portions 3022 and 3023 at two ends and a plane welding portion 3021 at the middle part, and there is a protrusion portion 3024 between the plane welding portions, and by welding three points (see A, B, C three welding connection points in fig. 2) at the same time through such an electrical connection sheet (equivalent to a jumper), the amount of material can be increased, which is suitable for the application of a large-current photovoltaic module, and at the same time, the heat dissipation area can be increased, and the heat dissipation effect can be improved; in a preferred embodiment, the width of the flat welds 3022, 3023 at both ends is less than the width of the boss 3024.
In another preferred embodiment, referring to fig. 1 and 2, the end of the second conductive terminal 30 is provided with a cable riveting portion 40 (the cable riveting portion shown in fig. 2 is a plane structure before molding), so as to facilitate riveting the modular photovoltaic bypass element 200 with the cable when the photovoltaic junction box is mounted. The cable riveting portion 40 extends from the end of the second conductive terminal 30 and is formed with the second conductive terminal 30 into an integral structure through stamping. In the preferred embodiment of the present invention, the cable riveting portion 40 is U-shaped, and the two sides of the U-shape are provided with the slots 41, which can realize the sectional riveting and improve the strength and reliability of the riveting connection. In practical application, in order to meet different application requirements, the cable riveting portion may be disposed at an end portion of any one of the first conductive terminal and the second conductive terminal, or disposed at both end portions of the first conductive terminal and the second conductive terminal, which is not limited in the present invention.
Preferably, a third opening 11 for the bus bar to pass through is formed on the first conductive terminal 10 near the insulative plastic package body 21.
Preferably, the first conductive terminal 10 is provided with a first bus bar welding area 12; the second conductive terminal 30 is provided with a second bus bar soldering region 33. The first bus bar welding area 12 may be a structure formed by a plane protrusion or a plane depression of the first conductive terminal 10, and the second bus bar welding area 33 may be a structure formed by a plane protrusion or a plane depression of the second conductive terminal 30, so that a worker can conveniently and quickly position the bus bar when welding the bus bar, and the welding position deviation can be avoided.
According to another object of the invention, the invention also proposes a photovoltaic module junction box comprising a box body, a box cover and an improved modular photovoltaic module bypass element as described above arranged in the box body. The junction box can be a single-body junction box used alone or a split junction box used in combination. When being applied to by left box body, well box body, when the split type terminal box of the combination use that right box body constitutes, at left box body, well box body, can install the modularization photovoltaic bypass component of isostructure in the right box body, the cable conductor riveting of the modularization photovoltaic module bypass component in the left box body is connected with the cable conductor of left box body connection, the cable conductor riveting of the modularization photovoltaic module bypass component in the right box body is connected with the cable conductor of right box body connection, the cable conductor riveting of the modularization photovoltaic module bypass component inside well box body does not connect the cable conductor, thereby can adopt a structure to be applied to in different box bodies, satisfy the installation demand, avoid adding man-hour at the terminal box and producing the binding post of multiple structure, save the input of extra stamping die, and make things convenient for the management of spare part in the production process, save cost, and improve.
In summary, the invention provides a modularized photovoltaic module bypass element, which adopts an integrated packaging technology of conductive terminals and diodes to avoid secondary switching, and adopts a double-diode chip design to enhance the current carrying capacity and the heat dissipation capacity of the bypass element; the areas of the two convex parts of the conductive terminals of the two diode chips are designed to be nearly equal or equal, so that the current carrying capacity and the heat dissipation capacity can be optimized; the end part of the conductive terminal is provided with a cable riveting part, when the modular photovoltaic bypass element is applied to a left box body or a right box body of the split type junction box, the cable riveting part is respectively connected with a cable, when the modular photovoltaic bypass element is applied to a middle box body, the cable riveting part is not connected with the cable, one structure can be adopted to be applied to different box bodies of the split type junction box, so that a wiring terminal for producing various structures during junction box processing can be avoided, the investment of an additional stamping die is saved, the management of parts in the production process is facilitated, the cost is saved, and the efficiency is improved. In addition, it should be understood that the present invention is not limited to the protection device using the diode as the modular bypass element, and the protection device may also be an integrated circuit module having a bypass protection function.
The present invention has been described in relation to the above embodiments, which are only exemplary of the implementation of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. Rather, it is intended that all such modifications and variations be included within the spirit and scope of this invention.
Claims (10)
1. An improved modularized photovoltaic assembly bypass element is characterized by comprising a first conductive terminal, a bypass protection device packaging module and a second conductive terminal, wherein the bypass protection device packaging module is arranged between the first conductive terminal and the second conductive terminal and comprises an insulating plastic package body, a bypass protection device arranged inside the insulating plastic package body and an electric connecting sheet for connecting the bypass protection device and the conductive terminals, the inner ends of the first conductive terminal and the second conductive terminal are inserted into the insulating plastic package body, and the first conductive terminal and the second conductive terminal are respectively connected with two electrodes of the bypass protection device; the middle part of one end of the second conductive terminal extending into the insulating plastic package body is provided with a T-shaped groove rotating by 90 degrees to form a first groove for the bus belt to pass through, a second groove matched with the end part of the first conductive terminal, and a first protruding part and a second protruding part which are positioned at two sides of the second groove, and a third groove for the bus belt to pass through is arranged on the first conductive terminal close to the insulating plastic package body; the middle part of one end of the first conductive terminal extending into the insulating plastic package body is provided with a third protruding part, and the third protruding part is inserted into the second slot and has a gap with a set distance with the first protruding part and the second protruding part; the two bypass protection devices are respectively arranged on the first protruding part and the second protruding part and are electrically connected with the first protruding part and the second protruding part; the two ends of the electric connection sheet are respectively and electrically connected with the two bypass protection devices, and the middle of the electric connection sheet is connected with the third protruding part.
2. An improved modular photovoltaic module bypass component as claimed in claim 1 wherein said bypass protection device is a diode or an integrated circuit module.
3. An improved modular photovoltaic module bypass element as claimed in claim 1 or 2, characterized in that the ratio of the area of said first and second protrusions for providing a bypass protection means is 0.8-1.2.
4. An improved modular photovoltaic module bypass element as claimed in claim 3 wherein said first and second protrusions have a ratio of area of 0.9 to 1.1.
5. An improved modular photovoltaic module bypass element as claimed in claim 4 wherein said first and second protrusions are of equal area.
6. An improved modular photovoltaic module bypass component as claimed in claim 3 wherein said electrical connection tabs include flat welds at both ends and at the middle with a raised portion between the flat welds.
7. An improved modular photovoltaic module bypass component as claimed in claim 6 wherein the width of the flat welds at both ends is less than the width of the bosses.
8. The improved bypass element of modular photovoltaic modules as claimed in claim 3, wherein said first conductive terminal and/or said second conductive terminal has a cable rivet at an end thereof.
9. The improved modular photovoltaic module bypass component according to claim 3, wherein the first conductive terminal has a first bus bar solder area; the second conductive terminal is provided with a second bus bar welding area.
10. A pv junction box comprising a box body, a box cover, and an improved modular pv bypass element as claimed in any one of claims 1 to 9 disposed within the box body.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010656258 | 2020-07-09 | ||
| CN2020106562582 | 2020-07-09 |
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| Publication Number | Publication Date |
|---|---|
| CN111769798A true CN111769798A (en) | 2020-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010742330.3A Pending CN111769798A (en) | 2020-07-09 | 2020-07-29 | Improved modularized photovoltaic assembly bypass element and assembly junction box |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112511101A (en) * | 2020-11-30 | 2021-03-16 | 苏州快可光伏电子股份有限公司 | Cascade photovoltaic power generation efficiency management intelligent optimizer |
-
2020
- 2020-07-29 CN CN202010742330.3A patent/CN111769798A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112511101A (en) * | 2020-11-30 | 2021-03-16 | 苏州快可光伏电子股份有限公司 | Cascade photovoltaic power generation efficiency management intelligent optimizer |
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