CN214412668U - Improved split type photovoltaic assembly junction box - Google Patents
Improved split type photovoltaic assembly junction box Download PDFInfo
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- CN214412668U CN214412668U CN202120609673.2U CN202120609673U CN214412668U CN 214412668 U CN214412668 U CN 214412668U CN 202120609673 U CN202120609673 U CN 202120609673U CN 214412668 U CN214412668 U CN 214412668U
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- 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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Abstract
The utility model provides an improved split type photovoltaic assembly junction box, which comprises a left junction box, a middle junction box and a right junction box; the left and right junction boxes comprise box covers, box bodies and conductive terminals arranged in the box bodies; the middle junction box comprises a box cover, a box body and a bypass protection component arranged in the box body; the bypass protection assembly comprises a first conductive terminal, a second conductive terminal, a third conductive terminal and a fourth conductive terminal which are linearly arranged; a bypass protection element is arranged between two adjacent conductive terminals. The improved split type photovoltaic module junction box has compact structure and saves volume; the three diodes are arranged in parallel, so that the space of the box body is utilized to the maximum extent, and the height of the box body is greatly reduced; the bypass protection element is concentrated in the middle box body, and the maintenance and the detection are more convenient compared with the traditional three-part junction box; the terminal box's application range is more extensive, is applicable in the photovoltaic module that converges to take the difference in interval.
Description
Technical Field
The utility model relates to a solar photovoltaic power generation technical field especially relates to a split type photovoltaic module terminal box of modified.
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 to avoid hot spot effect caused by damage or local shielding of battery pieces of a photovoltaic module battery string. The photovoltaic module junction box is generally provided with a positive conductive terminal and a negative conductive terminal in a box body, and a bypass protection device is connected between the positive conductive terminal and the negative conductive terminal and is connected in series in a battery string of the module. The existing 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, for example, the overcurrent capacity of the junction box is stronger, and the photovoltaic module is suitable for large-current output; it is desirable to minimize the volume of the assembly, reduce the shading effect on the surface of the assembly, etc.
As shown in fig. 1, the conventional split-type photovoltaic module junction box generally includes a left junction box 1, a middle junction box 2, and a right junction box 3, taking the left junction box of fig. 2 as an example, the junction box includes a box cover 101, a box body 103, and a bypass protection module disposed in the box body, the bypass protection module includes a first conductive terminal 1021, a second conductive terminal 1022, and a bypass diode 1023 disposed between and electrically connected to the first conductive terminal 1021 and the second conductive terminal, the outer ends of the left and right junction boxes include cable fixing portions (e.g., cable fixing portion 1031 of the left junction box shown in fig. 1), and the cable 40 passes through the cable fixing portions and then is connected and fixed to the conductive terminals in the junction box.
In the three-part junction box, the bypass protection modules are arranged in the three junction boxes, and the internal structures are almost the same, so that the junction box is beneficial from the perspective of part standardization, but the junction box also has some problems, for example, because the box body is smaller and the internal space is smaller, in order to achieve the effects of electrical performance and heat dissipation, the height of the junction box needs to be designed to be higher under the condition that the area of the junction box is not allowed to be increased; in addition, when the assembly fails, the three junction boxes need to be detected one by one to find problems and remove the faults, so that the maintenance cost is high; in addition, the junction box is suitable for assemblies with regular arrangement of battery pieces and consistent distance of battery strings, and is troublesome in application of irregular assemblies.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the shortcoming that exists in using to current product, and the split type photovoltaic module terminal box of a modified that proposes, compact structure, detection easy maintenance and adaptable various types of photovoltaic module.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an improved split type photovoltaic assembly junction box comprises a left junction box, a middle junction box and a right junction box; the left junction box and the right junction box comprise box covers, box bodies and conductive terminals arranged in the box bodies; the conductive terminal comprises a bus bar passing slot and a bus bar welding area;
the middle junction box comprises a box cover, a box body and a bypass protection component arranged in the box body; the bypass protection assembly comprises a first conductive terminal, a second conductive terminal, a third conductive terminal and a fourth conductive terminal which are linearly arranged; a bypass protection element is arranged between two adjacent conductive terminals and is respectively fixed with the two adjacent conductive terminals to form electric connection; the conductive terminal includes a bus bar through slot and a bus bar land thereon.
Preferably, the end parts of the conductive terminals in the left junction box and the right junction box are provided with convex ribs.
Preferably, the bypass protection element in the junction box is an axial diode, and three axial diodes are arranged in parallel in the box body.
Preferably, the conductive terminal of the intermediate junction box is provided with a folded edge with a slotted structure at the connection and fixation position with the shaft diode, and two pins of the shaft diode are arranged in the slotted structure.
Preferably, the axial direction of the axial diode is perpendicular to the length direction of the junction box.
Preferably, the pin of the shaft diode is fixedly connected with the first conductive terminal, the second conductive terminal, the third conductive terminal and the fourth conductive terminal by soldering or resistance welding.
Preferably, the first conductive terminal, the second conductive terminal, the third conductive terminal and the fourth conductive terminal are provided with convex ribs at positions welded with the pins of the shaft diode.
Preferably, among the first, second, third and fourth conductive terminals, the first and fourth conductive terminals located at two sides have the same structure, and the third and fourth conductive terminals located in the middle have the same structure.
Preferably, the first conductive terminal and the fourth conductive terminal are substantially L-shaped, the third conductive terminal and the fourth conductive terminal are substantially Z-shaped, and one end of each of the adjacent conductive terminals is arranged in a staggered manner.
Preferably, the conductive terminals in the middle junction box and/or the left junction box and the right junction box are provided with flanging structures.
The utility model has the advantages that the improved split photovoltaic assembly junction box has compact structure and volume saving; the three diodes are arranged in parallel, so that the space of the box body is utilized to the maximum extent, and the height of the box body is greatly reduced; the bypass protection element is concentrated in the middle box body, and the maintenance and the detection are more convenient compared with the traditional three-part junction box; the terminal box's application range is more extensive, is applicable in the photovoltaic module that converges to take the difference in interval.
Drawings
FIG. 1 is an exploded perspective view of a split photovoltaic module junction box of the prior art;
fig. 2 is an exploded perspective view of the left junction box of the split photovoltaic module junction box of fig. 1;
fig. 3 is a schematic perspective view illustrating an improved split-type photovoltaic module junction box according to an embodiment of the present invention;
fig. 4 is a schematic plan view of the assembled split photovoltaic module junction box of fig. 3 (with the upper cover removed);
fig. 5 is an exploded perspective view of the left junction box of the split photovoltaic module junction box of fig. 3;
FIG. 6 is a schematic view of the conductive terminals in the left junction box body of FIG. 5;
fig. 7 is an exploded perspective view of a junction box of the split photovoltaic module junction box of fig. 3;
fig. 8 is a schematic structural view of the conductive terminals in the box body of the junction box of fig. 7.
Detailed Description
In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.
See that fig. 3 shows the utility model discloses a spatial structure of split type photovoltaic module terminal box of modified decomposes the sketch map, split type photovoltaic module terminal box, including left terminal box 10, well terminal box 20 and right terminal box 30, it all includes lid, box body and arranges the conductive terminal in the box body in.
Referring to fig. 5 and 6, taking the left junction box 10 as an example, it includes a box cover 11, a box body 13 and conductive terminals 12 disposed in the box body 13; the conductive terminal 102 includes a bus bar through slot 123 and a bus bar land 122; the end part of the box body 13 comprises a cable fixing part 131, and the pressing block 14 is matched with the cable fixing part 131 and firmly connected and fixed with the cable 40 and the box body through ultrasonic compression joint; in a preferred embodiment, the cable and the conductive terminal 12 are welded and fixed by resistance welding, and in order to improve the reliability of welding, as shown in fig. 1, a protruding rib 121 is provided at an end of the conductive terminal, and protrudes toward a surface where the conductive terminal and the cable are welded, so that the welding efficiency can be improved, and an environmentally-friendly soldering process can be avoided, and the protruding rib 121 may be a protruding structure with a certain height formed by directly punching a material with a certain width and length on the conductive terminal by a punching process. The structure of the right junction box 30 is the same as that of the left junction box, and the description thereof is not repeated.
Referring to fig. 7, a schematic perspective exploded view of a middle junction box of an improved split-type photovoltaic module junction box according to an embodiment of the present invention is shown, the middle junction box 20 includes a box cover 21, a box body 23, and a bypass protection component 22 disposed in the box body; referring to fig. 8, the bypass protection assembly 22 includes a first conductive terminal 221, a second conductive terminal 222, a third conductive terminal 223 and a fourth conductive terminal 224 disposed in a linear arrangement; a bypass protection element 23 is arranged between two adjacent conductive terminals and is respectively fixed with the two conductive terminals to form electric connection; the conductive terminals include bus bar through slots 2204 and bus bar lands 2203 thereon.
In a preferred embodiment, the bypass protection element 23 is an axial diode, and three axial diodes are arranged in parallel in the junction box. In a preferred embodiment, the conductive terminal is provided with a folded edge 2201 having a slotted structure at a position where the conductive terminal is connected and fixed with the diode, and during production, two pins of the shaft diode 23 are placed in the slotted structure, so that convenience in assembling the diode can be ensured, and positioning of the pins during welding with the conductive terminal can be facilitated, thereby preventing the pins from shifting. In a preferred embodiment, the axial direction of the axial diode is perpendicular to the length direction of the junction box.
With reference to fig. 8, the pins of the shaft diode 23, the first conductive terminal 221, the second conductive terminal 222, the third conductive terminal 223, and the fourth conductive terminal 224 may be fixed by a conventional soldering process, in a preferred embodiment, the pins of the shaft diode and the conductive terminals are connected by resistance welding, in order to improve the efficiency of the resistance welding, a rib 2022 is provided at the position where the first conductive terminal 221, the second conductive terminal 222, the third conductive terminal 223, and the fourth conductive terminal 224 are welded to the pins of the shaft diode, and the protruding direction of the rib 2022 faces the surface where the conductive terminals are welded to the cable. The rib 2202 may be a raised structure having a height formed by directly stamping a material having a width and a length on a conductive terminal using a stamping process.
The utility model discloses in preferred embodiment, adopt at the standardized shaft type diode of electron industry as bypass protection component, and constitute the electrically conductive terminal subassembly of bypass protection with the conductive terminal of special design, the too big electric current ability of shaft type diode compares SMD diode and will excel in a lot, and be the standard part, do benefit to and make the product of unified specification with the terminal box, adapt to various application environment's user demand, need not to design and produce the terminal box of different specifications according to different operation requirement, the cost of the equipment of very big reduction production (mainly stamping forming mould, plastic forming mould), and make things convenient for the management of spare part in the production process, simplified process, the volume of terminal box is reduced. It should be understood that the present invention is not intended to exclude other bypass protection devices as the preferred embodiment, and indeed, the present invention is equally applicable to an integrated circuit module having a patch diode or bypass protection function between adjacent conductive terminals of a junction box.
In another preferred embodiment, among the first, second, third and fourth conductive terminals, the first and fourth conductive terminals located at two sides have the same structure, and the third and fourth conductive terminals located in the middle have the same structure, so that the number of stamping dies can be reduced and the part management in production is facilitated.
Preferably, the first conductive terminal and the fourth conductive terminal are substantially L-shaped, and the third conductive terminal and the fourth conductive terminal are substantially Z-shaped, so that one ends of the adjacent conductive terminals can be staggered with each other, the space in the junction box is more compact, and the volume of the junction box is reduced. It should be understood that, the present invention refers to the conductive terminals in the middle junction box in the drawings from left to right as the first conductive terminal, the second conductive terminal, the third conductive terminal and the fourth conductive terminal in turn, and is only for the purpose of clearly describing the embodiments of the present invention, and is not limited to the setting position of the conductive terminals.
In another preferred embodiment, in order to improve the heat dissipation effect of the junction box, a flanging structure (not shown) may be designed on the conductive terminals in the junction box, so as to facilitate the heat dissipation effect in a high-current usage scenario and prolong the service life of the junction box.
The utility model discloses an improved split type photovoltaic module junction box, the bypass protection components are all arranged in the middle box body, the left and right box bodies are externally connected with the output cable, and in the three-part box body, the left and right box bodies are empty boxes, and are externally connected with the output power of the cable by the conductive terminal (generally copper plate); three bypass protection elements of the whole assembly are arranged in a middle box body, the middle box body comprises three bypass protection elements and four confluence grooves of confluence belts which can be connected, and the left box body and the right box body are respectively provided with one confluence groove of the confluence belt which is connected; resistance welding is adopted between the diode and the conductive terminal and between the cable and the conductive terminal, welding is tight, and the structure is firm and reliable.
The improved split type photovoltaic module junction box has compact structure and saves volume; the three diodes are arranged in parallel, so that the space of the box body is utilized to the maximum extent, and the height of the box body is greatly reduced; the bypass protection element is concentrated in the middle box body, and the maintenance and the detection are more convenient compared with the traditional three-part junction box; the terminal box's application range is more extensive, is applicable in the photovoltaic module that converges to take the difference in interval.
The present invention has been described in relation to the above embodiments, which are only examples for implementing the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. On the contrary, all changes and modifications which do not depart from the spirit and scope of the present invention are deemed to fall within the scope of the present invention.
Claims (10)
1. An improved split type photovoltaic assembly junction box is characterized by comprising a left junction box, a middle junction box and a right junction box;
the left junction box and the right junction box comprise box covers, box bodies and conductive terminals arranged in the box bodies; the conductive terminal comprises a bus bar passing slot and a bus bar welding area;
the middle junction box comprises a box cover, a box body and a bypass protection component arranged in the box body; the bypass protection assembly comprises a first conductive terminal, a second conductive terminal, a third conductive terminal and a fourth conductive terminal which are linearly arranged; a bypass protection element is arranged between two adjacent conductive terminals and is respectively fixed with the two adjacent conductive terminals to form electric connection; the conductive terminal includes a bus bar through slot and a bus bar land thereon.
2. The improved split photovoltaic module junction box of claim 1, wherein the conductive terminals of the left and right junction boxes are provided with ribs at their ends.
3. The improved split photovoltaic module junction box of claim 1, wherein the bypass protection elements in the junction box are axial diodes and three axial diodes are arranged in parallel in the box body.
4. The improved split photovoltaic module junction box as claimed in claim 3, wherein the conductive terminals of the intermediate junction box are provided with a folded edge having a groove structure at the connection fixing position with the shaft diode, and two pins of the shaft diode are arranged in the groove structure.
5. An improved split photovoltaic junction box as claimed in claim 3 wherein the axial direction of said axial diode is perpendicular to the length of the box.
6. The improved split photovoltaic module junction box as claimed in claim 3, wherein the pins of the shaft diode are fixed to the first conductive terminal, the second conductive terminal, the third conductive terminal and the fourth conductive terminal by soldering or resistance welding.
7. The improved split photovoltaic module junction box of claim 3, wherein the first, second, third and fourth conductive terminals have ribs at locations where the pins of the shaft diode are soldered.
8. The improved split photovoltaic module junction box as claimed in claim 1, wherein the first, second, third and fourth conductive terminals are identical in structure, and the third and fourth conductive terminals are identical in structure.
9. The improved split photovoltaic module junction box of claim 8, wherein the first and fourth conductive terminals are generally L-shaped, the third and fourth conductive terminals are generally Z-shaped, and one end of each adjacent conductive terminal is staggered.
10. The improved split photovoltaic module junction box as claimed in claim 1, wherein the conductive terminals in the middle junction box and/or the left and right junction boxes are provided with flanging structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120609673.2U CN214412668U (en) | 2021-03-25 | 2021-03-25 | Improved split type photovoltaic assembly junction box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120609673.2U CN214412668U (en) | 2021-03-25 | 2021-03-25 | Improved split type photovoltaic assembly junction box |
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| CN214412668U true CN214412668U (en) | 2021-10-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113067545A (en) * | 2021-03-25 | 2021-07-02 | 苏州快可光伏电子股份有限公司 | Improved split type photovoltaic assembly junction box |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113067545A (en) * | 2021-03-25 | 2021-07-02 | 苏州快可光伏电子股份有限公司 | Improved split type photovoltaic assembly junction box |
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