CN111969947A - Photovoltaic module bypass element assembly with excellent heat dissipation performance and junction box - Google Patents
Photovoltaic module bypass element assembly with excellent heat dissipation performance and junction box Download PDFInfo
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- CN111969947A CN111969947A CN202011027651.1A CN202011027651A CN111969947A CN 111969947 A CN111969947 A CN 111969947A CN 202011027651 A CN202011027651 A CN 202011027651A CN 111969947 A CN111969947 A CN 111969947A
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- heat dissipation
- bypass
- conductive terminal
- photovoltaic module
- bypass element
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- 230000017525 heat dissipation Effects 0.000 title claims abstract description 80
- 238000004806 packaging method and process Methods 0.000 claims abstract description 16
- 238000009413 insulation Methods 0.000 claims abstract description 8
- 238000003466 welding Methods 0.000 claims description 25
- 239000002184 metal Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011521 glass Substances 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
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
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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 a photovoltaic module bypass element assembly with excellent heat dissipation performance, which comprises a modularized bypass element and an auxiliary heat dissipation element arranged below the modularized bypass element, wherein the modularized bypass element comprises a first conductive terminal, an insulating packaging module and a second conductive terminal; the insulation packaging module packages the bypass protection device inside; the auxiliary radiating element comprises a first radiating element and a second radiating element which are arranged on the left and the right, and are respectively positioned on two sides of the insulating packaging module; the heat dissipation element comprises a plane part, a side edge perpendicular to the plane part and a positioning part. The invention also provides the junction box. The photovoltaic module bypass element assembly is based on the modularized bypass element design, and the auxiliary heat dissipation element design matched with the modularized bypass element is added, so that the heat dissipation capacity of the bypass element assembly is remarkably improved, and the photovoltaic module bypass element assembly is suitable for heat dissipation performance in a high-current application environment.
Description
Technical Field
The invention relates to the technical field of solar photovoltaic power generation, in particular to a photovoltaic module bypass element assembly and a junction box which have excellent heat dissipation performance and are particularly suitable for a high-power photovoltaic module.
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; therefore, a modularized bypass element for packaging a bypass protection device and positive and negative conductive terminals together is designed, the size of the junction box can be greatly reduced, the junction box is standardized, however, practical use verifies that the heat dissipation is carried out only by depending on the area of the conductive terminals (generally copper sheets) under the condition that a box body of the junction box is small, and for the occasions of large-current application, for example, when the current exceeds 30A, the heat dissipation effect can not reach the use requirement; therefore, how to ensure that the junction box has strong heat dissipation capacity while reducing the volume of the junction box as much as possible, and the service life of the junction box and the safety of the photovoltaic module in the working process are ensured to be the problems which need to be solved urgently.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a photovoltaic module bypass element assembly with excellent heat dissipation performance, which is used in a photovoltaic module junction box, improves the production efficiency and ensures the heat dissipation performance in a high-current use environment.
In order to achieve the purpose, the invention adopts the following technical scheme:
a photovoltaic module bypass element assembly with excellent heat dissipation performance comprises a modularized bypass element and an auxiliary heat dissipation element arranged below the modularized bypass element, wherein the modularized bypass element comprises a first conductive terminal, an insulation packaging module and a second conductive terminal, a first convergence belt welding area and a first convergence belt slotted hole are arranged on the first conductive terminal, a second convergence belt welding area and a second convergence belt slotted hole are arranged on the second conductive terminal, at least one bypass protection device is arranged on the surface of one end, adjacent to the first conductive terminal and the second conductive terminal, of the first conductive terminal, and the bypass protection device is electrically connected with the second conductive terminal through a jumper wire or a copper welding sheet; the insulation packaging module packages the bypass protection device inside; the auxiliary heat dissipation element comprises a first heat dissipation element and a second heat dissipation element which are arranged on the left and the right, and the first heat dissipation element and the second heat dissipation element are respectively positioned on two sides of the insulating packaging module; the first heat dissipation element and the second heat dissipation element comprise plane portions, side edges and positioning portions, the plane portions are in contact with the lower surfaces of the first conductive terminal and the second conductive terminal, the side edges are perpendicular to the plane portions, the positioning portions correspond to the positions of the positioning holes in the first conductive terminal and the second conductive terminal, and the side edges are bent upwards or downwards.
Preferably, the first bus bar welding area and the second bus bar welding area are of a concave structure, a concave portion is arranged on the first radiating element and the second radiating element of the auxiliary radiating element corresponding to the first bus bar welding area and the second bus bar welding area, and the lower surface of the bus bar welding area abuts against the upper surface of the concave portion.
Preferably, the first heat dissipation element and the second heat dissipation element have the same structure and are arranged symmetrically left and right.
Preferably, the first heat dissipation element and the second heat dissipation element of the auxiliary heat dissipation element are formed into an integral structure through the insulating plastic connection part.
Preferably, a plurality of bypass protection devices are uniformly arranged on the first conductive terminal at intervals.
Preferably, the bypass protection device is welded on the corresponding first conductive terminal, the lower half part of the insulation packaging module is provided with heat dissipation holes, and the exposed metal surface of the conductive terminal can be directly seen through the heat dissipation holes.
Preferably, the end parts of the first conductive terminal and the second conductive terminal are provided with convex ribs, and the modular bypass element is connected with the cable by resistance welding.
Still preferably, the bypass protection device is a diode chip or an integrated circuit module with a bypass protection function.
According to another aspect of the present invention, the present invention provides a photovoltaic module junction box using the above bypass element assembly, the junction box includes a box cover, a box body, and the above photovoltaic module bypass element assembly disposed in the box body.
Preferably, the junction box is a single-body junction box or a split junction box.
Preferably, the side edge of the auxiliary heat dissipation element of the photovoltaic module bypass element assembly abuts against the side wall of the box body.
The photovoltaic module bypass element assembly with excellent heat dissipation performance is based on the design of a modular bypass element and is additionally provided with the design of an auxiliary heat dissipation element matched with the modular bypass element, so that the heat dissipation capacity of the bypass element assembly is obviously improved, the process can be simplified, and the volume of the modular photovoltaic bypass element is reduced; the conductive terminals can be conveniently provided with a plurality of bypass protection devices, and the current-carrying capacity of the bypass elements is increased, so that the heat dissipation performance under a high-current application environment is adapted, and the application requirements of a high-power photovoltaic assembly are adapted. In addition, standardized design can be realized for the modularized bypass element and the auxiliary radiating element, 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.
Drawings
Fig. 1 is an exploded perspective view of a photovoltaic module bypass element assembly with excellent heat dissipation performance according to an embodiment of the present invention;
fig. 2 is an exploded perspective view of a photovoltaic module bypass element assembly with excellent heat dissipation performance according to another embodiment of the present invention;
fig. 3 is an exploded view of the junction box of the bypass component assembly of the present invention.
The part element numbers and names in the figures are as follows:
110-modular bypass element, 120-auxiliary heat dissipation element, 10-first conductive terminal, 11-first bus bar slot hole, 12-first bus bar welding area, 20-insulation packaging module, 22-diode chip, 30-second conductive terminal, 31-second bus bar slot hole, 32-second bus bar welding area, 302-jumper wire and 40-convex edge.
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, a schematic structural diagram of a photovoltaic module bypass element assembly with excellent heat dissipation performance according to an embodiment of the present invention is shown, where the bypass element assembly includes a modular bypass element 110 and an auxiliary heat dissipation element 120 disposed below the modular bypass element 110, the modular bypass element 110 includes a first conductive terminal 10, an insulating package module 20 and a second conductive terminal 30, the first conductive terminal 10 is provided with a first bus bar welding area 12 and a first bus bar slot 11, the second conductive terminal 30 is provided with a second bus bar welding area 32 and a second bus bar slot 31, one end surface of the first conductive terminal 10 adjacent to the second conductive terminal is provided with at least one bypass protection device, and the bypass protection device is electrically connected to the second conductive terminal through a jumper or a copper pad; the insulation packaging module 20 is used for packaging a bypass protection device inside; the auxiliary heat dissipation element 120 includes a first heat dissipation element 121 and a second heat dissipation element 122 disposed on the left and right sides, and the first heat dissipation element 121 and the second heat dissipation element 122 are respectively located at two sides of the insulating package module 20; the first heat dissipating element 121 and the second heat dissipating element 122 include a planar portion 1201 contacting the lower surfaces of the first conductive terminal 10 and the second conductive terminal 30, a side 1203 perpendicular to the planar portion 1201, and a positioning portion 1204, where the positioning portion 1204 corresponds to the positions of the positioning holes 24 on the first conductive terminal 10 and the second conductive terminal 30; the side 1203 may be bent upward or downward.
Preferably, the first bus bar welding area 12 and the second bus bar welding area 32 on the modular bypass component 110 are recessed structures formed by stamping metal plates of the first conductive terminal 10 and the second conductive terminal 30 for a set distance, so that a certain amount of solder tin can be pre-stored in the welding areas 12 and 32 before the bus bars are welded, and thus, the efficiency of bus bar welding can be improved; the auxiliary heat dissipating element 120 is provided with a recessed portion 1202 at a position corresponding to the first heat dissipating element 121 and the second heat dissipating element 122, and the lower surface of the bus bar land abuts against the upper surface of the recessed portion.
In another preferred embodiment, the first heat dissipation element 121 and the second heat dissipation element 122 have the same structure and are arranged symmetrically.
In another embodiment of the present invention, referring to fig. 2, the first heat dissipating element 121 and the second heat dissipating element 122 of the auxiliary heat dissipating element 120 are integrally formed by an insulating plastic connecting portion 1212, so that not only the parts management is facilitated, but also the installation during the production of the junction box is facilitated, and the assembly process is simplified.
In a preferred embodiment, in order to adapt to the application of large current, a plurality of bypass protection devices are uniformly arranged on the first conductive terminal at intervals, so that the capability of passing large current of a high-power photovoltaic module can be adapted.
In another preferred embodiment, heat dissipation holes (not shown) are disposed on the lower half portion of the insulating and packaging module 20 corresponding to the welding positions of the bypass protection devices on the first conductive terminals, and the metal surfaces of the exposed conductive terminals (i.e. the metal surfaces on the back of the welding positions of the bypass protection devices on the first conductive terminals in this embodiment) can be directly seen through the heat dissipation holes; in a more preferred embodiment, the heat dissipation holes can be elongated slots or one or more cylindrical holes; by the design, the heat dissipation capacity of the bypass element assembly can be further improved.
In another preferred embodiment, when the modular bypass element 110 is welded to the cable, the cable is directly connected and fixed to the end of the first conductive terminal and/or the second conductive terminal by resistance welding; preferably, in order to enhance the effect of the resistance welding, the end parts of the first conductive terminal and the second conductive terminal are provided with convex ribs 40, and the convex ribs are raised structures with certain height formed by directly stamping materials with certain width and length at the end parts of the conductive terminals by adopting a stamping process. In practical applications, in order to meet different application requirements, the protruding rib 40 may be disposed at an end of any one of the first conductive terminal and the second conductive terminal, or disposed at both ends of the first conductive terminal and the second conductive terminal, which is not limited in the present invention.
It should be understood that, in the present invention, the right conductive terminal in the modular bypass element 110 in the drawings is referred to as a first conductive terminal, and the left conductive terminal is referred to as a second conductive terminal, which is only for the purpose of clearly describing the embodiments of the present invention and does not limit the position where the bypass protection element is disposed; in a specific implementation, a user may also set the right conductive terminal as the first conductive terminal and the left conductive terminal as the second conductive terminal in the above embodiment, which should be regarded as an equivalent implementation of the above embodiment.
In addition, it should be understood that the bypass protection device of the present invention may use a diode chip as a protection device of the modular bypass element, or may use an integrated circuit module having a bypass protection function as a protection device, which is not particularly limited by the present invention.
According to another aspect of the present invention, the present invention provides a photovoltaic module junction box using the above bypass element assembly, the junction box includes a box cover, a box body, and a bypass element assembly 100 disposed in the box body; in a preferred embodiment, referring to fig. 3, the junction box is a split junction box, and includes a left junction box, a middle junction box, and a right junction box, where the left junction box, the middle junction box, and the right junction box include a box cover 101, box bodies (a left box body 102, a middle box body 103, and a right box body 104), and a bypass element assembly 100 disposed in the box bodies; the first conductive terminal 10 of the bypass component assembly 100 in the left box 102 is connected with one end of the cable 106, and the other end of the cable 106 is connected with the female connector 105; the second conductive terminal 30 of the bypass component assembly 100 in the right box 104 is connected with one end of the cable 106, the other end of the cable is connected with the male connector 108, and one end of the left box 102 and one end of the right box 104 are respectively provided with a cable fixing member 107 for fixing the cable and the box; in a preferred embodiment, the side 1203 of the auxiliary heat dissipating element 120 of the bypass element assembly 100 abuts against the side wall of the box.
The photovoltaic module bypass element assembly with excellent heat dissipation performance is based on the design of a modular bypass element and is additionally provided with the design of an auxiliary heat dissipation element matched with the modular bypass element, so that the heat dissipation capacity of the bypass element assembly is obviously improved, the process can be simplified, and the volume of the modular photovoltaic bypass element is reduced; the conductive terminals can be conveniently provided with a plurality of bypass protection devices, and the current-carrying capacity of the bypass elements is increased, so that the heat dissipation performance under a high-current application environment is adapted, and the application requirements of a high-power photovoltaic assembly are adapted. In addition, standardized design can be realized for the modularized bypass element and the auxiliary radiating element, 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.
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 (11)
1. A photovoltaic module bypass element assembly with excellent heat dissipation performance is characterized by comprising a modularized bypass element and an auxiliary heat dissipation element arranged below the modularized bypass element, wherein the modularized bypass element comprises a first conductive terminal, an insulation packaging module and a second conductive terminal, a first convergence belt welding area and a first convergence belt slotted hole are formed in the first conductive terminal, a second convergence belt welding area and a second convergence belt slotted hole are formed in the second conductive terminal, at least one bypass protection device is arranged on the surface of one end, adjacent to the first conductive terminal and the second conductive terminal, of the first conductive terminal, and the bypass protection device is electrically connected with the second conductive terminal through a jumper wire or a copper welding sheet; the insulation packaging module packages the bypass protection device inside; the auxiliary heat dissipation element comprises a first heat dissipation element and a second heat dissipation element which are arranged on the left and the right, and the first heat dissipation element and the second heat dissipation element are respectively positioned on two sides of the insulating packaging module; the first heat dissipation element and the second heat dissipation element comprise plane portions, side edges and positioning portions, the plane portions are in contact with the lower surfaces of the first conductive terminal and the second conductive terminal, the side edges are perpendicular to the plane portions, the positioning portions correspond to the positions of the positioning holes in the first conductive terminal and the second conductive terminal, and the side edges are bent upwards or downwards.
2. The photovoltaic module bypass element assembly with excellent heat dissipation performance as recited in claim 1, wherein the first and second bus bar lands are recessed, and the first and second heat dissipation members of the auxiliary heat dissipation member are provided with recessed portions at positions corresponding to the first and second bus bar lands, and a lower surface of the bus bar land abuts against an upper surface of the recessed portions.
3. The photovoltaic module bypass element assembly with excellent heat dissipation performance according to claim 1 or 2, wherein the first heat dissipation element and the second heat dissipation element have the same structure and are arranged in a left-right symmetrical manner.
4. The photovoltaic module bypass element assembly with excellent heat dissipation performance of claim 3, wherein the first heat dissipation element and the second heat dissipation element of the auxiliary heat dissipation element are integrally formed through an insulating plastic connection portion.
5. The photovoltaic module bypass element assembly with excellent heat dissipation performance as recited in claim 4, wherein a plurality of bypass protection devices are uniformly spaced on the first conductive terminal.
6. The photovoltaic module bypass element assembly with excellent heat dissipation performance of claim 4, wherein heat dissipation holes are formed on the lower half portion of the insulating packaging module corresponding to the positions of the first conductive terminals where the bypass protection devices are welded, and the exposed metal surfaces of the conductive terminals can be directly seen through the heat dissipation holes.
7. The photovoltaic module bypass element assembly with excellent heat dissipation performance of claim 4, wherein the end portions of the first conductive terminal and the second conductive terminal are provided with ribs, and the modular bypass element and the cable are connected by resistance welding.
8. The photovoltaic module bypass element assembly with excellent heat dissipation performance according to claim 4, wherein the bypass protection device is a diode chip or an integrated circuit module with bypass protection function.
9. A photovoltaic module junction box comprising a box cover, a box body, and a photovoltaic module bypass element assembly as claimed in any one of claims 1 to 8 disposed in the box body.
10. The photovoltaic module junction box of claim 9 wherein said junction box is a single piece junction box or a split piece junction box.
11. The photovoltaic module junction box of claim 10 wherein the side of the auxiliary heat sink element of the photovoltaic module bypass element assembly abuts the side wall of the box body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011027651.1A CN111969947A (en) | 2020-09-25 | 2020-09-25 | Photovoltaic module bypass element assembly with excellent heat dissipation performance and junction box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011027651.1A CN111969947A (en) | 2020-09-25 | 2020-09-25 | Photovoltaic module bypass element assembly with excellent heat dissipation performance and junction box |
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| CN111969947A true CN111969947A (en) | 2020-11-20 |
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| CN202011027651.1A Pending CN111969947A (en) | 2020-09-25 | 2020-09-25 | Photovoltaic module bypass element assembly with excellent heat dissipation performance and junction box |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112701102A (en) * | 2020-12-17 | 2021-04-23 | 苏州快可光伏电子股份有限公司 | Photovoltaic module bypass element module and split type photovoltaic module junction box with same |
| CN114189206A (en) * | 2021-11-16 | 2022-03-15 | 晶澳（扬州）太阳能科技有限公司 | Photovoltaic module junction box |
| CN117674726A (en) * | 2023-08-04 | 2024-03-08 | 苏州快可光伏电子股份有限公司 | Bypass module of photovoltaic module, junction box and photovoltaic module |
-
2020
- 2020-09-25 CN CN202011027651.1A patent/CN111969947A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112701102A (en) * | 2020-12-17 | 2021-04-23 | 苏州快可光伏电子股份有限公司 | Photovoltaic module bypass element module and split type photovoltaic module junction box with same |
| CN112701102B (en) * | 2020-12-17 | 2024-08-23 | 苏州快可光伏电子股份有限公司 | Photovoltaic module bypass element module and split photovoltaic module junction box with photovoltaic module bypass element module |
| CN114189206A (en) * | 2021-11-16 | 2022-03-15 | 晶澳（扬州）太阳能科技有限公司 | Photovoltaic module junction box |
| CN117674726A (en) * | 2023-08-04 | 2024-03-08 | 苏州快可光伏电子股份有限公司 | Bypass module of photovoltaic module, junction box and photovoltaic module |
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