CN215934812U - Bypass module for high-current junction box with good heat dissipation performance and junction box with bypass module - Google Patents
Bypass module for high-current junction box with good heat dissipation performance and junction box with bypass module Download PDFInfo
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- CN215934812U CN215934812U CN202121955866.XU CN202121955866U CN215934812U CN 215934812 U CN215934812 U CN 215934812U CN 202121955866 U CN202121955866 U CN 202121955866U CN 215934812 U CN215934812 U CN 215934812U
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- junction box
- bypass
- module
- conductive terminal
- bypass module
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- 230000017525 heat dissipation Effects 0.000 title claims abstract description 22
- 238000003466 welding Methods 0.000 claims abstract description 21
- 238000005476 soldering Methods 0.000 claims abstract description 17
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000003860 storage Methods 0.000 claims abstract description 10
- 239000000565 sealant Substances 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000002844 melting Methods 0.000 abstract description 3
- 230000008018 melting Effects 0.000 abstract description 3
- 229910000679 solder Inorganic materials 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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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 utility model provides a bypass module with good heat dissipation for a high-current junction box, which comprises a first conductive terminal, a second conductive terminal and a bypass protection device electrically connected with the first conductive terminal and the second conductive terminal; the first conductive terminal and the second conductive terminal respectively comprise a cable welding part arranged at the end part, a soldering tin pre-storage part adjacent to the bypass protection device and a slot arranged between the cable welding part and the soldering tin pre-storage part; gaps for the bus bars to pass through are respectively arranged between the bypass protection device and the first and second conductive terminals. The utility model also provides a photovoltaic module junction box applying the bypass module. The bypass module for the photovoltaic module junction box can facilitate the flowing of the sealant in the box body, so that the module is completely wrapped by the sealant, and the heat dissipation is facilitated; the melting of the bus bar soldering tin caused by the welding of the cable wire is avoided, and the product yield is ensured; the production cost of the bypass module and the junction box is obviously reduced, the high-power module is suitable for the use requirement of passing large current, and the heat dissipation performance is excellent.
Description
Technical Field
The utility model relates to the technical field of solar photovoltaic power generation, in particular to a bypass module for a high-current junction box with excellent heat dissipation performance applied to a photovoltaic module and the photovoltaic module junction box with the bypass 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 module is arranged in the junction box to avoid hot spot effect caused by damage or local shielding of battery pieces of a photovoltaic module battery string. A photovoltaic module junction box bypass module generally includes positive and negative conductive terminals and a bypass protection device (e.g., a bypass diode) connected between the positive and negative conductive terminals in series with a battery string of the module. The current photovoltaic module is developing towards high-efficient high-power subassembly, this has just proposed new requirement to the bypass module of terminal box, for example, the too big electric current ability of terminal box will be stronger, need reduce the subassembly volume as far as possible in addition again, reduces to the subassembly surface sheltering from influence etc. so, has brought the challenge to the heat-sinking capability of terminal box.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a bypass module for a high-current photovoltaic assembly junction box with good heat dissipation performance and a photovoltaic assembly junction box applying the bypass module, aiming at the defects and the use requirements in the application of the existing products; the structure is compact, the heat dissipation performance is excellent, and the use requirement that large current of a high-power photovoltaic module passes through is met.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a bypass module with good heat dissipation performance for a high-current junction box comprises a first conductive terminal, a second conductive terminal and a bypass protection device which is respectively and electrically connected and fixed with the first conductive terminal and the second conductive terminal; the first conductive terminal and the second conductive terminal respectively comprise a cable welding part arranged at the end part, a soldering tin pre-storage part adjacent to the bypass protection device, and a slot arranged between the cable welding part and the soldering tin pre-storage part; a first gap and a second gap for the bus bar to pass through are respectively arranged between the bypass protection device and the first conductive terminal and between the bypass protection device and the second conductive terminal; the first conductive terminal and the second conductive terminal are provided with positioning holes for installing and positioning the bypass module and the junction box body.
Preferably, the bypass protection device is an axial diode, a patch diode or an integrated circuit module with a bypass protection function.
Still preferably, the bypass protection device is an axial diode.
Still preferably, the axial direction of the axial diode is perpendicular to the length direction of the bypass module.
Preferably, the first conductive terminal and the second conductive terminal of the bypass module are formed with flange structures in a vertical direction at side edges thereof.
According to another aspect of the present invention, the present invention provides a photovoltaic module junction box using the above bypass module, the junction box includes a box cover, a box body, and the above bypass module fixed in the box body.
Preferably, the junction box is a split junction box and comprises a left junction box, a middle junction box and a right junction box, and the left junction box, the middle junction box and the right junction box respectively comprise a box cover, a box body and a bypass module arranged in the box body; the first conductive terminal of the bypass module in the left junction box and the second conductive terminal of the bypass module in the right junction box are respectively welded and fixed with the cable, the junction of the left junction box body and the right junction box body with the cable is provided with a protruding end, and the cable buckle and the protruding end are fixed to fix the cable; the cables on the two sides of the junction box are respectively connected with the positive and negative connecting ends of the connector.
Preferably, a plurality of positioning columns are arranged at the two ends and the middle part of the box body and respectively correspond to a plurality of positioning holes on the conductive terminals of the bypass module, and the bypass module is fixed in the box body in a suspended manner.
The bypass module for the photovoltaic module junction box can facilitate the flowing of the sealant in the box body, so that the module is completely wrapped by the sealant, and the heat dissipation is facilitated; the melting of the bus bar soldering tin caused by the welding of the cable wire is avoided, and the product yield is ensured; the production cost of the bypass module and the junction box is obviously reduced, the high-power module is suitable for the use requirement of passing large current, and the heat dissipation performance is excellent.
Drawings
Fig. 1 is a perspective view of a high current bypass module with good heat dissipation for a photovoltaic module junction box according to the present invention;
fig. 2 is an exploded perspective view of a split photovoltaic module junction box of the present invention employing the bypass module of fig. 1;
fig. 3 is an enlarged schematic structural view of a left terminal box of the split terminal box of fig. 2.
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 perspective view of a high-current bypass module with good heat dissipation performance applied to a junction box of a photovoltaic module according to the present invention is shown, where the bypass module 200 includes a first conductive terminal 10, a second conductive terminal 20, and a bypass protection device 30 electrically connected and fixed to the first conductive terminal 10 and the second conductive terminal 20, respectively; the first conductive terminal 10 comprises a cable welding part 12 arranged at the end part, a soldering tin pre-storage part 11 adjacent to the bypass protection device 30, and a slot 13 arranged between the cable welding part 12 and the soldering tin pre-storage part 11; the second conductive terminal 20 includes a cable soldering portion 22 disposed at an end portion, a solder pre-storing portion 21 adjacent to the bypass protection device 30, and a slot 23 disposed between the cable soldering portion 22 and the solder pre-storing portion 21; a first gap 15 and a second gap 25 for the bus bar to pass through are arranged between the bypass protection device 30 and the first conductive terminal 10 and the second conductive terminal 20; the first conductive terminal 10 and the second conductive terminal 20 are provided with positioning holes 16 and 26 for mounting and positioning the bypass module and the junction box body. The cable soldering part and the solder pre-storing part can be formed by directly stamping metal materials of the conductive terminals to form convex ribs (cable soldering part) or concave pits (solder pre-storing part) with a certain raised or depressed height. The bypass protection device 30 may be an axial diode, a patch diode, or an integrated circuit module with bypass protection function.
According to the bypass module 200 for the photovoltaic module junction box, the grooves 13 are designed on the conductive terminals (generally metal terminals made of copper plates through stamping), so that on one hand, flowing of sealant in the box body is facilitated when the junction box is filled with sealant, the sealant can completely wrap the copper plates, and heat dissipation is facilitated; on the other hand, the conductive terminal is provided with the slots, so that the use condition can be met, the weight of the copper plate can be reduced, and the conductive terminal has a positive effect on reducing the cost of a product; in addition, compared with the original tin soldering, the resistance welding has the advantages of high efficiency and environmental protection, more resistance welding processes are adopted between the conventional cable and the conductive terminal, namely the cable welding part of the cable and the conductive terminal is directly subjected to resistance welding and fixing, and because the bypass module 200 is processed in advance and then subjected to cable welding and junction box assembly, when the cable and the conductive terminal are subjected to resistance welding, the solder already exists on the solder pre-storage part 11 of the bypass module, and the bus bar is also connected, so that the heat conduction in the resistance welding process can be greatly prevented by the design of the slotting structure, the tin blocks on the tin storage disc are protected from being melted, the bus bar is prevented from falling off, and the production yield is greatly improved; moreover, because the notch is close to cable conductor welding part one end, when the cable conductor welding, the length is stretched out to the cable and the notch overlaps, when needs are consolidated to the cable conductor, can add the soldering cable, play the secondary and consolidate the effect, promoted the stability of welding cable greatly.
In a preferred embodiment, in order to improve the large current passing capability of the bypass module, the bypass protection device 30 of the bypass module 200 of the present invention uses an axial diode, and compared with a patch diode, the axial diode has a larger overcurrent capability and is a standard component, so that the cost can be reduced; preferably, the axial direction of the axial diode is perpendicular to the length direction of the bypass module, so that the overall structure of the bypass module and the junction box can be optimized, and the size is reduced.
In order to improve the heat dissipation performance of the bypass module when a large current passes through, referring to fig. 1, the first conductive terminals 10 and the second conductive terminals 20 of the bypass module 200 are formed with vertical flanged structures 14 and 24 at their side edges, so that the heat dissipation area of the conductive terminals can be enlarged, and the heat dissipation capability of the bypass module can be improved.
In another preferred embodiment, referring to fig. 1, in the middle of the bypass module 200, the first conductive terminal 10 and the second conductive terminal 20 are respectively designed with positioning holes 17 and 27; therefore, the whole bypass module is fixed by six points in the junction box body, and the structure is firmer and more reliable.
According to another aspect of the present invention, the present invention provides a photovoltaic module junction box using the above bypass module, the junction box includes a box cover, a box body and the above bypass module fixed in the box body. Referring to fig. 2, an exploded schematic view of a three-dimensional structure of a split junction box for a photovoltaic module using the bypass module 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 each include a box cover 100, a box body (a left box body 301, a middle box body 302, and a right box body 303), and a bypass module 200 disposed in the box body; a first conductive terminal of the bypass module 200 in the left junction box and a second conductive terminal of the bypass module 200 in the right junction box are respectively welded and fixed with the cable 305, the junction of the box body of the left junction box and the box body of the right junction box and the cable is provided with a protruding end, and the cable buckle 304 is fixed with the protruding end to fix the cable 305; the cables 305 on both sides of the split junction box are connected to the positive and negative connection ends of the connector respectively.
Referring to fig. 3, taking the left junction box of the split junction box as an example, in the box body 301, at the two ends and the middle part of the box body, a plurality of positioning columns 32 are arranged, and respectively correspond to a plurality of positioning holes on the conductive terminals of the bypass module, and the bypass module 200 is fixed in the box body in a suspended state.
It should be understood that the present embodiment is described by taking a split junction box as an example to illustrate the application of the bypass module of the present invention, but the bypass module of the present invention is not limited to be applied to a split junction box, and can also be applied to a single junction box.
The bypass module for the photovoltaic module junction box can facilitate the flowing of the sealant in the box body, so that the module is completely wrapped by the sealant, and the heat dissipation is facilitated; the melting of the bus bar soldering tin caused by the welding of the cable wire is avoided, and the product yield is ensured; the production cost of the bypass module and the junction box is obviously reduced, the high-power module is suitable for the use requirement of passing large current, and the heat dissipation performance is excellent.
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 utility model. Rather, it is intended that all such modifications and variations be included within the spirit and scope of this invention.
Claims (8)
1. The bypass module for the high-current junction box is characterized by comprising a first conductive terminal, a second conductive terminal and a bypass protection device which is electrically connected and fixed with the first conductive terminal and the second conductive terminal respectively; the first conductive terminal and the second conductive terminal respectively comprise a cable welding part arranged at the end part, a soldering tin pre-storage part adjacent to the bypass protection device, and a slot arranged between the cable welding part and the soldering tin pre-storage part; a first gap and a second gap for the bus bar to pass through are respectively arranged between the bypass protection device and the first conductive terminal and between the bypass protection device and the second conductive terminal; the first conductive terminal and the second conductive terminal are provided with positioning holes for installing and positioning the bypass module and the junction box body.
2. The bypass module for a high current junction box with good heat dissipation performance as claimed in claim 1, wherein the bypass protection device is an axial diode, a chip diode or an integrated circuit module with bypass protection function.
3. The thermally well-dissipated bypass module for a high current junction box of claim 1 wherein said bypass protection device is an axial diode.
4. The bypass module for a high current junction box having improved heat dissipation according to claim 3, wherein the axial direction of said axial diode is perpendicular to the longitudinal direction of the bypass module.
5. The bypass module for a high current junction box having excellent heat dissipation according to claim 1, wherein the bypass module has a vertical flange structure formed at the side of the first and second conductive terminals.
6. A photovoltaic module junction box having a bypass module according to any of claims 1-5, wherein the junction box comprises a box cover, a box body and the bypass module secured in the box body.
7. The photovoltaic module junction box of claim 6, wherein the junction box is a split junction box comprising a left junction box, a middle junction box and a right junction box, each of the left junction box, the middle junction box and the right junction box comprising a box cover, a box body and a bypass module disposed in the box body; the first conductive terminal of the bypass module in the left junction box and the second conductive terminal of the bypass module in the right junction box are respectively welded and fixed with the cable, the junction of the left junction box body and the right junction box body with the cable is provided with a protruding end, and the cable buckle and the protruding end are fixed to fix the cable; the cables on the two sides of the junction box are respectively connected with the positive and negative connecting ends of the connector.
8. The junction box of claim 6, wherein the junction box has a plurality of positioning posts at two ends and a middle portion of the box body, the positioning posts respectively corresponding to the plurality of positioning holes on the conductive terminals of the bypass module to fix the bypass module in the box body in a suspended manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121955866.XU CN215934812U (en) | 2021-08-19 | 2021-08-19 | Bypass module for high-current junction box with good heat dissipation performance and junction box with bypass module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121955866.XU CN215934812U (en) | 2021-08-19 | 2021-08-19 | Bypass module for high-current junction box with good heat dissipation performance and junction box with bypass module |
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| Publication Number | Publication Date |
|---|---|
| CN215934812U true CN215934812U (en) | 2022-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121955866.XU Active CN215934812U (en) | 2021-08-19 | 2021-08-19 | Bypass module for high-current junction box with good heat dissipation performance and junction box with bypass module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119093862A (en) * | 2024-11-07 | 2024-12-06 | 宁波市创源光伏科技有限公司 | Photovoltaic junction box and processing method thereof |
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2021
- 2021-08-19 CN CN202121955866.XU patent/CN215934812U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119093862A (en) * | 2024-11-07 | 2024-12-06 | 宁波市创源光伏科技有限公司 | Photovoltaic junction box and processing method thereof |
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