CN220421769U - Junction box and photovoltaic module - Google Patents
Junction box and photovoltaic module Download PDFInfo
- Publication number
- CN220421769U CN220421769U CN202321853343.3U CN202321853343U CN220421769U CN 220421769 U CN220421769 U CN 220421769U CN 202321853343 U CN202321853343 U CN 202321853343U CN 220421769 U CN220421769 U CN 220421769U
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- China
- Prior art keywords
- sealant
- junction box
- adhesive layer
- utility
- model
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- 239000000565 sealant Substances 0.000 claims abstract description 63
- 239000012790 adhesive layer Substances 0.000 claims abstract description 49
- 239000010410 layer Substances 0.000 claims abstract description 11
- 239000000853 adhesive Substances 0.000 claims description 23
- 230000001070 adhesive effect Effects 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 7
- 239000004814 polyurethane Substances 0.000 claims description 6
- 229920002635 polyurethane Polymers 0.000 claims description 6
- 229920006332 epoxy adhesive Polymers 0.000 claims description 4
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 238000005336 cracking Methods 0.000 abstract description 8
- 238000009413 insulation Methods 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Landscapes
- Photovoltaic Devices (AREA)
Abstract
The utility model discloses a junction box and a photovoltaic module, wherein the junction box comprises: the box body is internally provided with a containing cavity; the electric element is arranged in the accommodating cavity; the sealant is arranged between the electrical element and the inner wall of the accommodating cavity; the first adhesive layer is arranged between the electrical element and the sealant; and/or a second adhesive layer, which is arranged between the sealant and the inner wall of the accommodating cavity. According to the junction box provided by the embodiment of the utility model, the bonding strength between the electrical element and the sealant is increased through the first bonding layer, and the bonding strength between the sealant and the inner wall of the accommodating cavity is increased through the second bonding layer, so that the bonding between the sealant and the electrical element and between the sealant and the inner wall of the junction box is more reliable, and the phenomenon of sealant cracking in the junction box can be reduced.
Description
Technical Field
The utility model relates to the technical field of photovoltaics, in particular to a junction box and a photovoltaic module.
Background
In the related art, the junction box uses a mode of filling sealant inside to realize multiple functions of water resistance, insulating property improvement, mechanical protection enhancement, electrical appliance fault reduction and the like. The method effectively prevents water and moisture from corroding and damaging cables, circuits and connectors, improves the mechanical protection performance and the insulation performance of the junction box, avoids phenomena such as electric leakage, circuit breaking and the like, and ensures long-term stable operation of electrical elements. However, the adhesion between the inner wall of the junction box and the electrical component is relatively weak, and the problem of sealant cracking easily occurs. And thus may cause short circuits, electrical faults, etc.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a junction box, in which the sealant is not easy to crack and the safety is high.
It is yet another object of the present utility model to provide a photovoltaic module.
An embodiment of a junction box according to a first aspect of the present utility model includes: the box body is internally provided with a containing cavity; the electric element is arranged in the accommodating cavity; the sealant is arranged between the electrical element and the inner wall of the accommodating cavity; the first adhesive layer is arranged between the electrical element and the sealant; and/or a second adhesive layer, which is arranged between the sealant and the inner wall of the accommodating cavity.
According to the junction box provided by the embodiment of the utility model, the bonding strength between the electrical element and the sealant is increased through the first bonding layer, and the bonding strength between the sealant and the inner wall of the accommodating cavity is increased through the second bonding layer, so that the bonding between the sealant and the electrical element and between the sealant and the inner wall of the junction box is more reliable, and the phenomenon of cracking of the sealant in the junction box can be reduced.
According to some embodiments of the utility model, the adhesive strength of the first adhesive layer is greater than the adhesive strength of the sealant; and/or
The bonding strength of the second bonding layer is greater than that of the sealant.
According to some embodiments of the utility model, the first adhesive layer is a two-component epoxy adhesive layer.
According to some embodiments of the utility model, the second adhesive layer is a two-component polyurethane adhesive layer.
According to some embodiments of the utility model, the first adhesive layer has a thickness d 1 Wherein said d 1 The method meets the following conditions: d is more than or equal to 25 mu m 1 ≤35μm。
According to some embodiments of the utility model, the d 1 Further satisfies: d, d 1 =25, 28, 30 or 35 μm.
According to some embodiments of the utility model, the second adhesive layer has a thickness d 2 Wherein said d 2 The method meets the following conditions: d is less than or equal to 20 mu m 2 ≤30μm。
According to some embodiments of the utility model, the d 2 Further satisfies: d, d 2 =20, 25, 28 or 30 μm.
According to some embodiments of the utility model, the sealant is a silicone gel.
The photovoltaic module according to the embodiment of the second aspect of the utility model comprises the junction box according to the embodiment of the first aspect of the utility model.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1 is a schematic structural view of a junction box according to an embodiment of the present utility model.
Reference numerals:
100: a junction box;
1: a case body; 2: an electrical component; 3: sealing glue; 4: a first adhesive layer; 5: and a second adhesive layer.
Detailed Description
Embodiments of the present utility model are described in detail below, and the embodiments described with reference to the accompanying drawings are exemplary, and a junction box 100 according to a first aspect of the present utility model is described below with reference to fig. 1. The junction box 100 includes a box body 1, an electrical component 2, a sealant 3, a first adhesive layer 4, and/or a second adhesive layer 5. Wherein, the box body 1 is internally limited with a containing cavity, the electric element 2 is arranged in the containing cavity, and the sealant 3 is arranged between the electric element 2 and the inner wall of the containing cavity. The arrangement comprises the following three cases that the first junction box 100 comprises the first bonding layer 4, the first bonding layer 4 is arranged between the electrical element 2 and the sealant 3, and the arrangement can increase the bonding strength between the electrical element 2 and the sealant 3, so that the cracking phenomenon of the sealant 3 in the junction box 100 is reduced; the second junction box 100 comprises a second adhesive layer 5, and the second adhesive layer 5 is arranged between the sealant 3 and the inner wall of the accommodating cavity, so that the adhesive strength between the sealant 3 and the inner wall of the accommodating cavity can be increased, and the cracking phenomenon of the sealant 3 in the junction box 100 is reduced; third, junction box 100 includes first adhesive layer 4 and second adhesive layer 5. So set up, can increase simultaneously the adhesive strength between electrical component 2 and the sealant 3 to and the adhesive strength between the inner wall in sealant 3 and holding the chamber, thereby more be favorable to reducing the phenomenon that the sealant 3 cracks appears in terminal box 100.
In addition, the electrical component 2 of the present utility model may be fixed to the inner wall of the accommodation chamber by a fixing member (e.g., a snap), and the electrical component 2 includes a copper plate, a wire, a diode, a bus bar, etc., and the wire, the diode, the bus bar, etc., are welded to the copper plate. Wherein, leave the gap between copper and the terminal box 100 inner wall, install the copper in terminal box 100 through the buckle.
According to the junction box 100 of the embodiment of the utility model, the bonding strength between the electrical element 2 and the sealant 3 is increased through the first bonding layer 4, and the bonding strength between the sealant 3 and the inner wall of the accommodating cavity is increased through the second bonding layer 5, so that the bonding between the sealant 3 and the electrical element 2 and between the sealant 3 and the inner wall of the junction box 100 is more reliable, and the phenomenon of cracking of the sealant 3 in the junction box 100 can be reduced. In this way, the corrosion and damage of water and moisture to cables, lines and connectors can be effectively prevented, the mechanical protection performance and the insulation performance of the junction box 100 are improved, the current leakage and the breaking phenomenon are avoided, and the long-term stable operation of the electrical element 2 is ensured. Can be suitable for use in relatively harsh operating environments, for example, as junction box 100 for an offshore photovoltaic module.
According to some embodiments of the present utility model, the adhesive strength of the first adhesive layer 4 is greater than the adhesive strength of the sealant 3. So set up, the adhesion between the electric element 2 and the sealant 3 can be strengthened to first adhesive layer 4, can effectively reduce the electric element 2 and take place the fracture phenomenon between the sealant 3 to improve the security that electric element 2 used in terminal box 100.
According to some embodiments of the present utility model, the adhesive strength of the second adhesive layer 5 is greater than the adhesive strength of the sealant 3. So set up, the adhesion stress between the inner wall in sealed glue 3 and holding the chamber can be strengthened to second adhesive linkage 5, can effectively avoid holding the inner wall in chamber and sealed glue 3 between the phenomenon of cracking to improve the security that electrical component 2 used in the terminal box 100.
According to some embodiments of the utility model, the first adhesive layer 4 is a two-component epoxy adhesive layer. So arranged, firstly, the two-component epoxy resin has better permeability and adhesiveness, and can firmly fix the sealant 3 on the surface of the electrical element 2. Secondly, the two-component epoxy resin can fill small holes and gaps on the surface of the substrate, and the physical bonding force and chemical bonding force between the sealant 3 and the electrical element 2 are increased, so that the bonding performance between the first bonding layer 4 and the electrical element 2 is improved. Therefore, the use of the two-component epoxy adhesive layer as the first adhesive layer 4 can increase the adhesive strength between the electrical component 2 and the sealant 3.
According to some embodiments of the utility model, the second adhesive layer 5 is a two-component polyurethane adhesive layer. So arranged, first, the two-component polyurethane has excellent adhesion and strength, and can firmly adhere the sealant 3 to the inner wall of the junction box 100. In addition, the two-component polyurethane also has chemical corrosion resistance and salt spray resistance, so that the junction box 100 also has higher safety performance in severe environments, for example, the junction box is suitable for severe environments at sea, and can maintain stronger adhesion between the sealant 3 and the inner wall of the accommodating cavity when faced with various problems such as high salt spray corrosion at sea, high ultraviolet, seawater soaking and the like, and reduce the cracking rate of the sealant 3. Therefore, the use of the two-component polyurethane adhesive layer as the second adhesive layer 5 can increase the adhesive strength between the sealant 3 and the inner wall of the accommodating chamber in a severe environment, and improve the safety performance thereof.
According to some embodiments of the utility model, the first adhesive layer 4 has a thickness d 1 Wherein d 1 The method meets the following conditions: d is more than or equal to 25 mu m 1 And less than or equal to 35 mu m. So arranged, if d 1 If the thickness of the first adhesive layer 4 is smaller than 25 μm, the adhesive strength between the sealant 3 and the electrical component 2 may be affected, and thus the safe use of the junction box 100 may be affected; if d 1 If the thickness of the first adhesive layer 4 is larger than 35 μm, the first adhesive layer 4 occupies a relatively large space in the accommodating chamber, which is disadvantageous to the mechanical strength and insulation performance of the junction box 100. By setting up, d 1 Satisfies d of 25 mu m 1 The thickness of the first adhesive layer 4 is less than or equal to 35 mu m, the thickness of the sealant 3 and the thickness of the electrical component 2 are properThe adhesive strength between the two is high, the junction box 100 is not easy to crack, the mechanical strength is high, and the safe use of the junction box 100 is facilitated.
According to some embodiments of the utility model, d 1 Further satisfies: d, d 1 =25, 28, 30 or 35 μm. So set up, the thickness of first adhesive linkage 4 is suitable, and the adhesive strength between sealant 3 and the electrical component 2 is big, and difficult fracture, the mechanical strength of terminal box 100 is high, is favorable to the safe handling of terminal box 100.
According to some embodiments of the utility model, the second adhesive layer 5 has a thickness d 2 Wherein d 2 The method meets the following conditions: d is less than or equal to 20 mu m 2 Less than or equal to 30 mu m. So arranged, if d 2 If the thickness of the second adhesive layer 5 is smaller than 20 μm, the adhesive strength between the sealant 3 and the electrical component 2 may be affected, thereby affecting the safe use of the junction box 100; if d 2 If the thickness of the second adhesive layer 5 is larger than 30 μm, the second adhesive layer 5 occupies a larger space in the accommodating chamber, which is disadvantageous to the mechanical strength and insulation performance of the junction box 100. By setting up, d 2 Satisfies d of 20 mu m 2 The thickness of the second adhesive layer 5 is less than or equal to 30 mu m, the adhesive strength between the sealant 3 and the inner wall of the accommodating cavity is high, the adhesive is not easy to crack, the mechanical strength of the junction box 100 is high, and the safe use of the junction box 100 is facilitated.
According to some embodiments of the utility model, d 2 Further satisfies: d, d 2 =20, 25, 28 or 30 μm. So set up, the thickness of second adhesive linkage 5 is suitable, and adhesive strength between the inner wall in sealed glue 3 and holding chamber is big, difficult fracture, and the mechanical strength of terminal box 100 is high, is favorable to the safe handling of terminal box 100.
According to some embodiments of the utility model, the sealant 3 is a silicone gel. The sealant 3 thus provided has high mechanical strength and excellent insulation performance, and can improve the waterproof performance of the junction box 100, improve the insulation performance of the junction box 100, strengthen the mechanical protection of the junction box 100, and reduce the multiple effects such as failure of the electrical component 2.
According to an embodiment of the second aspect of the utility model, the utility model provides a photovoltaic module comprising a junction box 100 according to an embodiment of the first aspect of the utility model.
According to the photovoltaic module provided by the embodiment of the utility model, the junction box 100 is good in safety, and the sealant 3 is not easy to crack.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.
While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A junction box, comprising:
the box body is internally provided with a containing cavity;
the electric element is arranged in the accommodating cavity;
the sealant is arranged between the electrical element and the inner wall of the accommodating cavity;
the first adhesive layer is arranged between the electrical element and the sealant; and/or
And the second adhesive layer is arranged between the sealant and the inner wall of the accommodating cavity.
2. The junction box according to claim 1, wherein the adhesive strength of the first adhesive layer is greater than the adhesive strength of the sealant; and/or
The bonding strength of the second bonding layer is greater than that of the sealant.
3. The junction box of claim 1 wherein said first adhesive layer is a two-component epoxy adhesive layer.
4. The junction box of claim 1 wherein said second adhesive layer is a two-component polyurethane adhesive layer.
5. The junction box according to any one of claims 1 to 4, wherein the first adhesive layer has a thickness d 1 Wherein said d 1 The method meets the following conditions: d is more than or equal to 25 mu m 1 ≤35μm。
6. The junction box according to claim 5, wherein d 1 Further satisfies: d, d 1 =25, 28, 30 or 35 μm.
7. The junction box according to any one of claims 1 to 4, characterized in that the thickness of the second adhesive layer is d 2 Wherein said d 2 The method meets the following conditions: d is less than or equal to 20 mu m 2 ≤30μm。
8. The junction box according to claim 7, wherein d 2 Further satisfies: d, d 2 =20, 25, 28 or 30 μm.
9. The junction box according to any of claims 1-4, wherein the sealant is a silicone gel.
10. A photovoltaic module comprising the junction box according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321853343.3U CN220421769U (en) | 2023-07-14 | 2023-07-14 | Junction box and photovoltaic module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321853343.3U CN220421769U (en) | 2023-07-14 | 2023-07-14 | Junction box and photovoltaic module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220421769U true CN220421769U (en) | 2024-01-30 |
Family
ID=89648444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321853343.3U Active CN220421769U (en) | 2023-07-14 | 2023-07-14 | Junction box and photovoltaic module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220421769U (en) |
-
2023
- 2023-07-14 CN CN202321853343.3U patent/CN220421769U/en active Active
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| GR01 | Patent grant |