CN219499342U - Photovoltaic junction box and photovoltaic module - Google Patents
Photovoltaic junction box and photovoltaic module Download PDFInfo
- Publication number
- CN219499342U CN219499342U CN202320885654.1U CN202320885654U CN219499342U CN 219499342 U CN219499342 U CN 219499342U CN 202320885654 U CN202320885654 U CN 202320885654U CN 219499342 U CN219499342 U CN 219499342U
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- CN
- China
- Prior art keywords
- junction box
- base
- protective cover
- photovoltaic
- photovoltaic junction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000001681 protective effect Effects 0.000 claims abstract description 65
- 238000007789 sealing Methods 0.000 claims abstract description 53
- 239000000565 sealant Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 7
- 239000002861 polymer material Substances 0.000 claims description 4
- 229920001169 thermoplastic Polymers 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 17
- 238000001556 precipitation Methods 0.000 abstract description 7
- 230000007774 longterm Effects 0.000 description 7
- 238000012360 testing method Methods 0.000 description 5
- 229920001971 elastomer Polymers 0.000 description 4
- 229920001955 polyphenylene ether Polymers 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 229920002379 silicone rubber Polymers 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- 229920002725 thermoplastic elastomer Polymers 0.000 description 2
- 229920002449 FKM Polymers 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- -1 butanediyl Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 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
- 239000004576 sand Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Landscapes
- Casings For Electric Apparatus (AREA)
- Photovoltaic Devices (AREA)
Abstract
The utility model provides a photovoltaic junction box and a photovoltaic module, wherein the photovoltaic junction box comprises a junction box body, a base and a protective cover, the base is fixedly connected with the junction box body, the protective cover is connected with the base to form a closed accommodating space, and the junction box body is accommodated in the accommodating space; a first sealing piece is arranged between the protective cover and the base and used for sealing a gap between the protective cover and the base. The photovoltaic junction box is provided with the protective cover and the base, the junction box body is accommodated in the airtight accommodating space formed by the protective cover and the base, and the first sealing piece seals the gap between the protective cover and the base, so that the safety performance, the sealing performance and the waterproof performance of the photovoltaic junction box can be improved, the photovoltaic junction box can be applied to areas with more humid weather and more precipitation, and on-water, off-sea photovoltaic and other scenes, and the photovoltaic junction box can be ensured to work normally for a long time.
Description
Technical Field
The utility model relates to the technical field of photovoltaics, in particular to a photovoltaic junction box and a photovoltaic module.
Background
The photovoltaic junction box is a key part of the photovoltaic junction box and is responsible for transmitting out the current generated by the photovoltaic module battery. The photovoltaic junction box is generally positioned on the back of the photovoltaic module, and a few junction boxes are positioned on the front of the photovoltaic module. One or more bypass diodes are usually arranged in the photovoltaic junction box, so that the generation efficiency loss and the component safety risk caused by the hot spot effect of the photovoltaic component are avoided. Because photovoltaic module and terminal box are installed outdoors, consequently the terminal box needs to guarantee long-term normal work in moist, rainy, aquatic, marine environment. Most of the current junction boxes are designed aiming at ground power stations and roof distributed photovoltaic modules, have poor long-term waterproof performance, have large waterproof failure for areas with more humid and precipitation in weather and water and offshore photovoltaic scenes, and have the risk of water inflow of the photovoltaic junction boxes. In some extreme environments, such as environments with long-term high temperature, long-term low temperature, large amount of sand wind in desert areas and the like, the box body and the box cover of the photovoltaic junction box can be cracked and failed.
The existing photovoltaic junction box is composed of a box body, a box cover, sealant and a diode, only the box body and the box cover are used for protecting the outside, and the sealant in the box body is used for sealing. In areas with more humid climate and precipitation and in water photovoltaic scenes, the risk of waterproof failure caused by water inflow of a large junction box exists.
Disclosure of Invention
The utility model provides a photovoltaic junction box and a photovoltaic module aiming at the defects in the prior art.
In one aspect, the utility model provides a photovoltaic junction box, which comprises a junction box body, a base and a protective cover, wherein the base is fixedly connected with the junction box body, the protective cover is connected with the base to form a closed accommodating space, and the junction box body is accommodated in the accommodating space;
a first sealing piece is arranged between the protective cover and the base and used for sealing a gap between the protective cover and the base.
On the other hand, the utility model also provides a photovoltaic module, which comprises the photovoltaic junction box.
The utility model has the following beneficial effects:
the utility model provides a photovoltaic junction box, which comprises a junction box body, a base and a protective cover, wherein the base is fixedly connected with the junction box body; a first sealing piece is arranged between the protective cover and the base and used for sealing a gap between the protective cover and the base. The photovoltaic junction box is provided with the protective cover and the base, the junction box body is accommodated in the airtight accommodating space formed by the protective cover and the base, and the first sealing piece seals the gap between the protective cover and the base, so that the safety performance, the sealing performance and the waterproof performance of the photovoltaic junction box can be improved, the photovoltaic junction box can be applied to areas with more humid weather and more precipitation, and on-water, off-sea photovoltaic and other scenes, and the photovoltaic junction box can be ensured to work normally for a long time.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the description serve to explain, without limitation, the utility model.
Fig. 1 is an exploded schematic view of a photovoltaic junction box according to an embodiment of the present utility model;
fig. 2 is a schematic diagram of the overall structure of a photovoltaic junction box according to an embodiment of the present utility model;
fig. 3 is a schematic structural diagram of a junction box body and a base of the photovoltaic junction box according to an embodiment of the present utility model.
Detailed Description
The present utility model will be described in further detail below with reference to the drawings and detailed description for the purpose of better understanding of the technical solution of the present utility model to those skilled in the art.
The utility model provides a photovoltaic junction box, which is shown in combination with figures 1, 2 and 3, and comprises a junction box body 1, a base 2 and a protective cover 3, wherein the base 2 is fixedly connected with the junction box body 1, the protective cover 3 is connected with the base 2 to form a closed accommodating space, and the junction box body 1 is accommodated in the accommodating space; a first seal 4 is arranged between the protective cover 3 and the base 2 for sealing a gap between the protective cover 3 and the base 2.
In some embodiments, the base 2 and the terminal block body 1 may be integrally formed.
The protection cover 3 is used as a first protection device, completely wraps the junction box body 1 and is isolated from the external environment, so that the protection performance and the waterproof performance of the photovoltaic junction box are improved, and the long-term reliability is improved.
The junction box body 1 comprises a box cover 11 and a box body 12, the box cover 11 is T-shaped, the box cover 11 comprises a first body and a second body which are arranged in a stacked mode, and the orthographic projection of the second body on the plane where the first body is located falls into the orthographic projection range of the first body on the plane; the box 11 comprises a side wall, and the side wall surrounds to form a containing space; the first surface of the first body adjacent to one side of the second body comprises a connecting area, a groove is arranged in the connecting area, and sealant is filled in the groove; the box cover 11 is buckled on the box body 12, the second body is accommodated in the accommodating space, the groove is propped against the upper surface of the side wall, and the sealing glue adheres to the box body 12 and the box cover 11. The box cover 11 is designed to be of a T-shaped structure, and the sealing structure is arranged on the surface, connected with the box body 12, of the T-shaped box cover 11, so that the sealing performance and the waterproof performance of the photovoltaic junction box can be improved, the photovoltaic junction box can be applied to the areas with more climates, moisture and precipitation, water, offshore photovoltaic and other scenes, and long-term normal operation of the photovoltaic junction box is guaranteed. The sealing structure formed by the box cover 11, the groove and the sealant is used as a second protection device of the photovoltaic junction box, so that the internal structure of the photovoltaic junction box can be protected.
The photovoltaic junction box is provided with the protective cover 3 and the base 2, the junction box body 1 is accommodated in the airtight accommodating space formed by the protective cover 3 and the base 2, and the first sealing piece 4 seals the gap between the protective cover 3 and the base 2, so that the safety performance, the sealing performance and the waterproof performance of the photovoltaic junction box can be improved, the photovoltaic junction box can be applied to areas with more humid weather and more precipitation, and on-water, off-sea photovoltaic and other scenes, and the photovoltaic junction box can work normally for a long time.
In some embodiments, the material of the protective cover 3 may be a thermoplastic polymer material or a metal material. In order to further reduce the electrical risk, the protective cover 3 of a thermoplastic polymer material is preferably used.
The materials of the junction box body 1, the base 2 and the protective cover 3 can be thermoplastic polymer materials, wherein the box body 12 and the base 2 can be integrally injection molded by utilizing a die, and the box cover 11 and the protective cover 3 can be respectively integrally injection molded by utilizing the die. In some embodiments, the materials of the junction box body 1, the base 2 and the protective cover 3 may be PPE (Polypheylene ether, polyphenylene ether) materials.
In some embodiments, the base 2 and the junction box body 1 are stacked, and the front projection of the junction box body 1 on the plane of the base 2 falls within the range of the front projection of the base 2 on the plane; the surface of the base 2 connected with the protective cover 3 is provided with an annular groove 5, and the first sealing element 4 is accommodated in the annular groove 5 and abuts against the edge of the protective cover 3.
In some embodiments, the first sealing member 4 may be a sealing ring or sealant, so as to ensure sealing waterproof performance between the protective cover 3 and the base 2. The sealing ring can be a silica gel sealing ring or a water-absorbing expansion sealing ring, and can be one of an SIL (silicon rubber) sealing ring, a VITON (fluorine element rubber) sealing ring, a TPE (thermoplastic elastomer) sealing ring, a polyacrylic water-absorbing expansion rubber sealing ring, a maleic anhydride graft water-absorbing expansion rubber sealing ring and a modified Gao Naji bentonite water-absorbing expansion rubber sealing ring. The sealant may be a solid water-blocking adhesive, and may be, for example, a butanediyl water-blocking adhesive or a silica gel.
In the case where the first sealing member 4 is a sealant, the sealant fills the annular groove 5, and when the protective cover 3 is pressed against the base 2, the sealant can tightly adhere the protective cover 3 and the base 2 together.
In some embodiments, the shape of the annular recess 5 includes, but is not limited to, a semi-circular shape, a rectangular shape, a square shape, or other shapes. In the case where the first sealing member 4 is a sealing ring, since the sealing ring is of a semicircular structure, in order to ensure a close fit between the annular groove 5 and the sealing ring, the annular groove 5 is semicircular in shape.
For ease of maintenance, in some embodiments, the protective cover 3 is detachably connected to the base 2.
In the embodiment of the present utility model, the protection cover 3 is connected with the base 2 through a fastening structure. It should be noted that, the protection cover 3 and the base 2 may be detachably connected by other methods, for example, by screwing.
In some embodiments, the number of the fastening structures is plural, and each fastening structure is distributed along the circumferential direction of the base 2 and the protective cover 3 at intervals, so as to improve the sealing performance of the connection between the protective cover 3 and the base 2. Because the terminal box body 1 and one side of the base 2 lead out the cable 6, can set up the buckle structure at the edge that does not have the lead out the cable 6 of terminal box body 1 and base 2. That is, at least three snap structures may be provided, each of which is located at one edge of the junction box body 1 and the base 2, respectively, thereby achieving tight connection between the protective cover 3 and the base 2.
In some embodiments, as shown in fig. 1 and 2, the fastening structure includes a fastener 71 and a slot 72, the fastener 71 is disposed on the base 2, the slot 72 is disposed on the protective cover 3, and the fastener 71 is fastened to the slot 72 to connect the protective cover 3 and the base 2.
In the embodiment of the utility model, the fastening structure is a vertical fastening structure, the fastening 71 is in an inverted L shape, the fastening groove 72 includes a hollowed-out portion, and when the protective cover 3 is pressed onto the base 2, the L-shaped fastening 71 passes through the hollowed-out portion of the fastening groove 72 to fasten the two. It should be noted that the implementation manner of the fastening structure includes various kinds, the vertical fastening structure of the present utility model is only illustrated by way of example, and any fastening structure capable of fastening the protection cover 3 and the base 2 is within the protection scope of the present utility model.
In some embodiments, as shown in fig. 1 and 3, the edge of the base 2 is provided with a junction opening 21, and the photovoltaic junction box further includes a second sealing member (not shown in the drawings) disposed at the junction opening 21 for sealing a gap between the base 2 and the cable 6 led out from the junction opening 21. The cable 6 in the terminal box body 1 is drawn out from the wiring port 21 of the base 2, and a gap exists between the cable 6 and the wiring port 21, so that the sealing performance and the waterproof performance of the position of the wiring port 21 are improved, and the second sealing piece is arranged at the wiring port 21 to seal the gap between the cable 6 at the wiring port 21 and the base 2, so that the sealing waterproof failure of the wiring port 21 of the base 2 can be prevented.
The photovoltaic junction box of the present utility model is described in detail below with reference to fig. 1 to 3 by way of a specific embodiment.
Referring to fig. 1 to 3, the photovoltaic junction box includes a junction box body 1, a base 2, and a protective cover 3, wherein PPE materials are used for a box body 12 of the base 2 and the junction box body 1, integral injection molding is performed by a mold, PPE materials are used for the protective cover 3, injection molding is performed by the mold, and the junction box body 1 is accommodated in an accommodating space formed by connecting the protective cover 3 and the base 2. The protection cover 3 is used as a first protection device, completely wraps the junction box body 1 and is isolated from the external environment, so that the protection performance and the waterproof performance of the photovoltaic junction box are improved, and the long-term reliability is improved. The cover 11 of the junction box body 1 serves as a second protection device for the photovoltaic junction box, protecting the internal structure of the photovoltaic junction box.
The edges of the base 2 and the protective cover 3 are provided with 5 buckling structures in total, wherein two long sides of the base 2 are respectively provided with two buckling structures 71, and the short side of the base 2 opposite to the cable 6 is provided with one buckling structure 71; the edge of the protection cover 3 is provided with 5 clamping grooves 72 in total, wherein two clamping grooves 72 are respectively arranged on two long sides of the protection cover 3, and one clamping groove 72 is arranged on the short side. The protection cover 3 is connected with the base 2 in a vertical buckling manner, and the protection cover 3 is vertically pressed downwards towards the base 2 until the buckling buckle 71 is buckled with the clamping groove 72 during installation, so that the protection cover 3 is buckled and locked with the base 2.
The base 2 is provided with a semicircular annular groove 5, and a circle of SIL silicone rubber sealing ring is arranged in the annular groove 5. After the protective cover 3 is clamped with the base 2, the SIL silicone rubber sealing ring is tightly clamped between the protective cover 3 and the base 2, so that a good sealing waterproof effect is achieved.
The photovoltaic junction box of the above embodiment was subjected to IP waterproof rating test according to IEC 60529.
Test one: the photovoltaic junction box is manufactured into a small plate sample, the small plate sample is placed at a distance of 2.5m-3m from a water jet, the inner diameter of the water jet is 6.3mm, the water flow is 12.5L/min, and the water inflow phenomenon does not occur in the photovoltaic junction box after water spraying for 3 minutes.
And II, testing: the photovoltaic junction box is made into a small plate sample, the small plate sample is placed in water, the distance between the bottom and the water surface is at least 1m, and the water inlet phenomenon does not occur in the photovoltaic junction box after the small plate sample is soaked for 30 minutes.
The waterproof grade test results show that the photovoltaic junction box of the embodiment passes the waterproof tests of IPX5 and IPX7 grades.
The embodiment of the utility model also provides a photovoltaic module, which comprises the photovoltaic junction box.
The photovoltaic module comprises a photovoltaic junction box, wherein the photovoltaic junction box comprises a junction box body 1, a base 2 and a protective cover 3, the base 2 is fixedly connected with the junction box body 1, the protective cover 3 is connected with the base 2 to form a closed accommodating space, and the junction box body 1 is accommodated in the accommodating space; a first sealing member 4 is arranged between the protective cover 3 and the base 2 and is used for sealing a gap between the protective cover 3 and the base 2. The photovoltaic junction box is provided with the protective cover 3 and the base 2, the junction box body 1 is accommodated in the airtight accommodating space formed by the protective cover 3 and the base 2, and the first sealing piece 4 seals the gap between the protective cover 3 and the base 2, so that the safety performance, the sealing performance and the waterproof performance of the photovoltaic junction box can be improved, the photovoltaic junction box can be applied to areas with more humid weather and more precipitation, and on-water, off-sea photovoltaic and other scenes, and the photovoltaic junction box can work normally for a long time.
It is to be understood that the above embodiments are merely illustrative of the application of the principles of the present utility model, but not in limitation thereof. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the utility model, and are also considered to be within the scope of the utility model.
Claims (10)
1. The photovoltaic junction box is characterized by comprising a junction box body, a base and a protective cover, wherein the base is fixedly connected with the junction box body, the protective cover is connected with the base to form a closed accommodating space, and the junction box body is accommodated in the accommodating space;
a first sealing piece is arranged between the protective cover and the base and used for sealing a gap between the protective cover and the base.
2. The photovoltaic junction box of claim 1 wherein said base is stacked with said junction box body and wherein an orthographic projection of said junction box body on a plane of said base falls within an orthographic projection of said base on said plane;
the surface of the base, which is connected with the protective cover, is provided with an annular groove, and the first sealing piece is accommodated in the annular groove and abuts against the edge of the protective cover.
3. The photovoltaic junction box of claim 2 wherein said first seal is a gasket or sealant.
4. The photovoltaic junction box of claim 1 wherein said protective cover is removably connected to said base.
5. The photovoltaic junction box of claim 4 wherein said protective cover is connected to said base by a snap-fit structure.
6. The photovoltaic junction box of claim 5 wherein said plurality of snap features are spaced apart along a circumference of said base and said protective cover.
7. The photovoltaic junction box of claim 5 wherein said snap feature comprises a snap and a snap groove, said snap being disposed on said base, said snap groove being disposed on said protective cover, said snap being snap-engaged with said snap groove.
8. The photovoltaic junction box of claim 1 wherein the material of the protective cover is a thermoplastic polymer material or a metallic material.
9. The photovoltaic junction box of any of claims 1-8 wherein an edge of the base is provided with a junction opening, the photovoltaic junction box further comprising a second seal disposed at the junction opening for sealing a gap between the base and a cable exiting from the junction opening.
10. A photovoltaic module comprising a photovoltaic junction box according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320885654.1U CN219499342U (en) | 2023-04-19 | 2023-04-19 | Photovoltaic junction box and photovoltaic module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320885654.1U CN219499342U (en) | 2023-04-19 | 2023-04-19 | Photovoltaic junction box and photovoltaic module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219499342U true CN219499342U (en) | 2023-08-08 |
Family
ID=87479331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320885654.1U Active CN219499342U (en) | 2023-04-19 | 2023-04-19 | Photovoltaic junction box and photovoltaic module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219499342U (en) |
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2023
- 2023-04-19 CN CN202320885654.1U patent/CN219499342U/en active Active
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