Junction box for photovoltaic module and photovoltaic module with junction box

Abstract

The utility model discloses a junction box for a photovoltaic assembly and a photovoltaic assembly with the junction box, and the junction box for the photovoltaic assembly comprises a housing, a first bonding layer and an antifouling layer. The shell is provided with a containing cavity which is suitable for containing an electronic element. The first bonding layer is arranged on the peripheral surface of the shell; the antifouling layer is arranged on the peripheral surface of the first bonding layer, and the thickness of the antifouling layer is larger than that of the bonding layer. According to the junction box for the photovoltaic module, the protection effect on the shell is enhanced, the problems of degradation, aging and the like caused by the fact that marine organisms are attached to the peripheral surface of the junction box can be prevented, the service life of the junction box is prolonged, and the safety performance of the junction box is also enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic components, in particular to a junction box for a photovoltaic component and a photovoltaic component having the junction box. Background Art

[0002] In the related technology, the demand for using photovoltaic modules at sea is increasing. However, when using photovoltaic modules at sea, they need to face the problem of marine biofouling, that is, marine organisms are easy to attach to the outer surface of the photovoltaic module into the photovoltaic junction box, which will cause degradation, aging, cracking and other problems of the photovoltaic junction box over a long period of time, shortening the service life of the photovoltaic junction box and reducing the safety performance of the photovoltaic module. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a junction box for a photovoltaic module, which enhances the protective effect of the shell, can prevent marine organisms from attaching to the outer peripheral surface of the junction box to cause degradation, aging and other problems, prolong the service life of the junction box, and also enhance the safety performance of the junction box.

[0004] Another object of the present invention is to provide a photovoltaic assembly using the junction box.

[0005] According to the first aspect of the utility model, a junction box for a photovoltaic module includes: a shell having a housing cavity suitable for placing electronic components; a first adhesive layer, the first adhesive layer is arranged on the outer peripheral surface of the shell; and an anti-fouling layer, the anti-fouling layer is arranged on the outer peripheral surface of the first adhesive layer, and the thickness of the anti-fouling layer is greater than the thickness of the adhesive layer.

[0006] According to the junction box for photovoltaic modules of the embodiment of the utility model, the first adhesive layer and the antifouling layer are provided on the outer peripheral surface of the shell of the junction box. Thus, compared with the traditional photovoltaic junction box, the protection of the shell is enhanced, and marine organisms can be prevented from attaching to the outer peripheral surface of the junction box to cause degradation, aging and other problems, thereby extending the service life of the junction box and enhancing the safety performance of the junction box.

[0007] According to some embodiments of the present invention, the thickness of the antifouling layer is d 1 , the d 1 Satisfy: 10.0μm≤d 1 ≤30.0μm.

[0008] According to some embodiments of the present invention, the antifouling layer is a chitosan-nano zinc oxide composite layer, and the first bonding layer is a polyurethane bonding layer.

[0009] According to some embodiments of the present invention, the content of nano zinc oxide in the anti-fouling layer is α, wherein α satisfies: 5wt%≤α≤15wt%.

[0010] According to some embodiments of the present invention, the thickness of the first bonding layer is d 2 , the d 2 Satisfy: 5.0μm≤d 2 ≤15.0μm.

[0011] According to some embodiments of the utility model, the junction box for a photovoltaic module further includes: a second adhesive layer, which is arranged on the outer peripheral surface of the electronic component; and a potting glue layer, which is located between the shell and the second adhesive layer.

[0012] According to some embodiments of the present invention, the thickness of the second bonding layer is d 3 The thickness of the potting glue layer is d 4 , the d 3 d 4 Satisfy respectively: 2.0μm≤d 3 ≤6.0μm,d 4 ≥2mm.

[0013] According to some embodiments of the present invention, the second bonding layer is an epoxy resin bonding layer, and the potting glue layer is an organic silicone layer.

[0014] According to some embodiments of the present invention, the housing is a polycarbonate housing, and the wall thickness of the housing is d 5 , the d 5 Satisfy: 2.0μm≤d 5 ≤4.0μm.

[0015] The photovoltaic assembly according to the second aspect of the present utility model includes the junction box for the photovoltaic assembly according to the first aspect of the present utility model.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 It is a schematic diagram of a junction box for a photovoltaic module according to an embodiment of the utility model.

[0019] Reference numerals:

[0020] 100. Junction box;

[0021] 1. Shell; 11. Electronic components; 2. First bonding layer; 3. Anti-fouling layer; 4. Second bonding layer; 5. Potting glue layer. DETAILED DESCRIPTION

[0022] Reference below Figure 1 A junction box 100 for a photovoltaic module according to an embodiment of a first aspect of the present utility model is described.

[0023] like Figure 1 As shown, a junction box 100 for a photovoltaic module according to an embodiment of the first aspect of the utility model includes a shell 1, a first adhesive layer 2 and an anti-fouling layer 3.

[0024] Specifically, the housing 1 has a receiving cavity suitable for placing the electronic component 11. The first adhesive layer 2 is disposed on the outer peripheral surface of the housing 1. The antifouling layer 3 is disposed on the outer peripheral surface of the first adhesive layer 2, and the thickness of the antifouling layer 3 is greater than that of the adhesive layer.

[0025] For example, in Figure 1 In the example, the shell 1 is roughly in the shape of a cuboid, the accommodating cavity is formed inside the shell 1, and the electronic component 11 can be placed in the middle of the accommodating cavity. The antifouling layer 3 is coated on the outer peripheral surface of the first adhesive layer 2 to prevent the shell 1 and the first adhesive layer 2 from being contaminated, prevent marine organisms, diatoms and bacteria from attaching to the first adhesive layer 2, and avoid the first adhesive layer 2 and the shell 1 from being degraded, aged and cracked.

[0026] By arranging the first adhesive layer 2 between the housing 1 and the antifouling layer 3, the adhesion between the antifouling layer 3 and the housing 1 can be enhanced, the antifouling layer 3 can be prevented from falling off from the housing 1, and the protective effect of the antifouling layer 3 on the housing 1 and the first adhesive layer 2 can be ensured. At the same time, when the thickness of the antifouling layer 3 is relatively thin, after the antifouling layer 3 becomes thinner due to long-term attachment of marine organisms, the first adhesive layer 2 can also protect the housing 1, thereby extending the service life of the junction box 100 and enhancing the safety performance of the junction box 100.

[0027] According to the junction box 100 for photovoltaic modules of the embodiment of the utility model, the first adhesive layer 2 and the antifouling layer 3 are provided on the outer peripheral surface of the shell 1 of the junction box 100. Therefore, compared with the traditional photovoltaic junction box, the protection effect of the shell 1 is enhanced, and the marine organisms can be prevented from attaching to the outer peripheral surface of the junction box 100 to cause degradation, aging and other problems, thereby extending the service life of the junction box 100 and enhancing the safety performance of the junction box 100.

[0028] According to some embodiments of the present invention, Figure 1 As shown, the thickness of the antifouling layer 3 is d 1 , d 1Satisfy: 10.0μm≤d 1 ≤30.0μm. When the photovoltaic module is working at sea, due to the harsh working environment, some marine organisms, diatoms and microorganisms are easy to attach to the periphery of the junction box 100, that is, to the outer surface of the antifouling layer 3. Therefore, when the thickness of the antifouling layer 3 is less than 10.0μm, the thickness of the antifouling layer 3 is relatively thin. After the antifouling layer 3 is corroded and degraded by the marine organisms, the thickness of the antifouling layer 3 is not enough to protect the shell 1 for a long time, resulting in the reduction of the protective effect of the antifouling layer 3 on the first bonding layer 2 and the shell 1, thereby shortening the service life of the shell 1. When the thickness of the antifouling layer 3 is greater than 30.0μm, the thickness of the antifouling layer 3 is relatively thick. When the antifouling layer 3 is coated on the outer surface of the first bonding layer 2, more raw materials will be used, which increases the production cost and also increases the weight of the junction box 100.

[0029] Therefore, when the thickness d of the antifouling layer 3 is 1 Satisfy 10.0μm≤d 1 When the thickness is ≤30.0 μm, the antifouling layer 3 can protect the first adhesive layer 2 and the housing 1, thereby improving the safety performance of the junction box 100, and reducing the production cost of the junction box 100, thereby making the weight design of the junction box 100 more reasonable and improving the applicability of the junction box 100.

[0030] According to some embodiments of the present invention, the antifouling layer 3 is a chitosan-nano zinc oxide composite layer. The chitosan-nano zinc oxide composite layer has more excellent anti-diatom and antibacterial activity. Therefore, the chitosan-nano zinc oxide composite layer is used as the antifouling layer 3, which can further enhance the protection of the housing 1, prevent the junction box 100 from being degraded, and improve the safety of the junction box 100.

[0031] The first adhesive layer 2 is a polyurethane adhesive layer. Polyurethane has good permeability and adhesion. The polyurethane adhesive layer is used as the first adhesive layer 2, so that the first adhesive layer 2 and the junction box 100 can form a strong chemical bond. At the same time, the first adhesive layer 2 and the anti-fouling layer 3 also have good compatibility, which can enhance the adhesion between the junction box 100 and the anti-fouling layer 3.

[0032] According to some embodiments of the present invention, the mass proportion of nano zinc oxide in the antifouling layer 3 is α, wherein α satisfies: 5wt%≤α≤15wt%. Figure 1Nano zinc oxide has photochemical effects and good ultraviolet shielding performance. It also has a series of unique properties such as antibacterial and antifungal, deodorizing and mildew-proofing, and has a large specific surface area and stronger activity. It can improve the wear resistance, mechanical strength and anti-aging performance indicators of the antifouling layer 3 and extend the service life. When the mass proportion of nano zinc oxide is less than 5wt%, the mass proportion of nano zinc oxide is too low, and the antifouling effect of the antibacterial and antifungal properties of the antifouling layer 3 is poor. When the mass proportion of nano zinc oxide is greater than 15wt%, the mass proportion of nano zinc oxide is too high, which increases the raw material cost of the antifouling layer 3. Therefore, the mass proportion α of nano zinc oxide in the antifouling layer 3 satisfies 5wt%≤α≤15wt%, which can enhance the protective effect of the antifouling layer 3 on the shell 1 and the first bonding layer 2, prevent the shell 1 and the first bonding layer 2 from being degraded, aged, split, etc. by marine organisms, and also control the production cost of the antifouling layer 3.

[0033] In some optional embodiments, when the mass proportion of nano zinc oxide is 12 wt %, the anti-fouling layer 3 produces the best protection effect.

[0034] According to some embodiments of the present invention, referring to Figure 1 , the thickness of the first adhesive layer 2 is d 2 , d 2 Satisfy: 5.0μm≤d 2 ≤15.0μm. When the thickness of the first adhesive layer 2 is less than 5.0μm, the thickness of the first adhesive layer 2 is too thin, resulting in poor adhesion of the first adhesive layer 2 to the shell 1 and the antifouling layer 3, and the antifouling layer 3 is easy to fall off from the first adhesive layer 2, thereby poor protection of the shell 1. When the thickness of the first adhesive layer 2 is greater than 15.0μm, the thickness of the first adhesive layer 2 is too thick, and the material used in the first adhesive layer 2 is too much, which is not conducive to saving production costs. Therefore, the thickness of the first adhesive layer 2 is set to d 2 Satisfy 5.0μm≤d 2 ≤15.0 μm, which ensures the adhesion strength between the antifouling layer 3 and the shell 1, prevents the shell 1 from being corroded and degraded by marine organisms, prolongs the service life of the junction box 100, and also reduces the cost of producing the junction box 100.

[0035] According to some embodiments of the present invention, the junction box 100 for photovoltaic modules further includes a second adhesive layer 4 and a potting layer 5. The second adhesive layer 4 is disposed on the outer peripheral surface of the electronic component 11. The potting layer 5 is located between the housing 1 and the second adhesive layer 4. For example, Figure 1In the example, the second adhesive layer 4 is arranged inside the housing 1 and bonded to the periphery of the electronic component 11. The potting glue layer 5 is filled on the periphery of the second adhesive layer 4. The second adhesive layer 4 ensures the adhesion between the potting glue layer 5 and the electronic component 11, so that the potting glue layer 5 can wrap the electronic component 11, prevent other substances from entering the electronic component 11, and ensure the safe operation of the electronic component 11.

[0036] Furthermore, if Figure 1 As shown, the thickness of the second adhesive layer 4 is d 3 , d 3 、Satisfy: 2.0μm≤d 3 ≤6.0μm. When the thickness of the second adhesive layer 4 is less than 2.0μm, the thickness of the second adhesive layer 4 is too thin, resulting in poor adhesion of the second adhesive layer 4, and the second adhesive layer 4 is easy to fall off from the outer peripheral surface of the electronic component 11. It is also difficult for the second adhesive layer 4 to form a strong chemical bond with the potting glue layer 5, thereby reducing the protection of the electronic component 11. When the thickness of the second adhesive layer 4 is greater than 6.0μm, the thickness of the second adhesive layer 4 is too thick, and the second adhesive layer 4 uses too much material, which is not conducive to saving production costs. Therefore, the thickness d of the second adhesive layer 4 is set to ≤6.0μm. 3 Satisfy 2.0μm≤d 3 ≤6.0 μm, ensuring the firmness of the bonding between the second adhesive layer 4 and the electronic component 11, enhancing the protection of the electronic component 11, extending the service life of the electronic component 11, and also reducing the cost of producing the junction box 100.

[0037] Optionally, the best effect is achieved when the thickness of the second adhesive layer 4 is 3 μm.

[0038] like Figure 1 As shown, the thickness of the encapsulating glue layer 5 is d 4 , d 4 Satisfaction:d 4 ≥2mm. When the thickness of the potting glue layer 5 is less than 2mm, the thickness of the potting glue layer 5 is thin, and there is less potting glue layer 5 between the electronic component 11 and the inner wall of the housing 1, so that the protection of the electronic component 11 by the potting glue layer 5 does not meet the requirements, and the protection of the electronic component 11 by the potting glue layer 5 is poor, which is not conducive to the safe operation of the electronic component 11. Therefore, the thickness of the potting glue layer 5 is greater than 2mm to ensure that the good weather resistance, high temperature resistance and electrical insulation of the potting glue layer 5 play a role, prevent water or dust and other substances from entering the electronic component 11, enhance the stability and sealing of the electronic component 11, extend the service life of the electronic component 11, and ensure that the electronic component 11 can operate safely.

[0039] According to some embodiments of the present invention, the second adhesive layer 4 is an epoxy resin adhesive layer. The epoxy resin adhesive layer has excellent permeability and adhesion, and can effectively spread and infiltrate the outer surface of the electronic component 11 to form good adhesion. The epoxy resin adhesive layer and the potting glue layer 5 can also form a strong chemical bond, thereby ensuring the protective effect of the second adhesive layer 4 on the electronic component 11.

[0040] The potting glue layer 5 is an organic silicone layer, which has good weather resistance, high temperature resistance and electrical insulation. Using the organic silicone layer as the potting glue layer 5 can effectively prevent moisture, dust and other substances from entering the interior of the junction box 100, ensure the safe operation of the electronic components 11, and improve the safety performance of the photovoltaic module.

[0041] According to some embodiments of the utility model, the shell 1 is a polycarbonate shell. Polycarbonate has the advantages of good transparency, easy coloring, low water absorption, high mechanical strength, good toughness, etc. At the same time, it has good heat and weather resistance, high dimensional stability, and a heat deformation temperature of up to 135-143°C, which enhances the structural strength of the shell 1, avoids damage to the shell 1, and improves the protection effect on the electronic components 11.

[0042] The wall thickness of the shell 1 is d 5 , d 5 Satisfy: 2.0μm≤d 5 ≤4.0μm. Figure 1 As shown, when the thickness of the shell 1 is less than 2.0 μm, the thickness of the shell 1 is too thin, resulting in poor structural stability of the shell 1, and the shell 1 is easily damaged, which reduces the protection of the electronic components 11. When the thickness of the shell 1 is greater than 6.0 μm, the thickness of the shell 1 is too thick, and the material used in the shell 1 is too much, which is not conducive to saving production costs. Therefore, the thickness d of the shell 1 is set to 5 Satisfy 2.0μm≤d 5 ≤4.0 μm, the service life of the housing 1 is prolonged, and the protective effect of the housing 1 on the electronic component 11 is enhanced, thereby prolonging the service life of the electronic component 11 and reducing the cost of the junction box 100.

[0043] The photovoltaic assembly (not shown) according to the embodiment of the second aspect of the utility model comprises the junction box 100 for the photovoltaic assembly according to the embodiment of the first aspect of the utility model.

[0044] The photovoltaic module according to the embodiment of the present invention adopts the junction box 100, which is beneficial to improving the anti-fouling performance of the photovoltaic module, improving the operating stability of the photovoltaic module, and extending the service life of the photovoltaic module, thereby improving the market competitiveness of the photovoltaic module.

[0045] Other structures and operations of the photovoltaic assembly according to the embodiment of the utility model are known to those skilled in the art and will not be described in detail here.

[0046] In the description of the present invention, it is necessary to understand that the terms "inside", "outside", and the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0047] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0049] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A junction box for a photovoltaic module, characterized in that: include: A housing, wherein the housing has a receiving cavity, and the receiving cavity is suitable for placing electronic components; a first adhesive layer, the first adhesive layer being disposed on an outer peripheral surface of the housing; The antifouling layer is arranged on the outer peripheral surface of the first bonding layer, and the thickness of the antifouling layer is greater than the thickness of the bonding layer.

2. The junction box for a photovoltaic module according to claim 1, characterized in that: The thickness of the antifouling layer is d1, and d1 satisfies: 10.0 μm≤d1≤30.0 μm.

3. The junction box for a photovoltaic module according to claim 1, characterized in that: The thickness of the first bonding layer is d2, and d2 satisfies: 5.0 μm≤d2≤15.0 μm.

4. The junction box for a photovoltaic module according to any one of claims 1 to 3, characterized in that: Also includes: a second adhesive layer, the second adhesive layer being disposed on the outer peripheral surface of the electronic component; A potting glue layer, wherein the potting glue layer is located between the shell and the second bonding layer.

5. The junction box for a photovoltaic module according to claim 4, characterized in that: The thickness of the second adhesive layer is d3, and the thickness of the potting glue layer is d4. The d3 and d4 respectively satisfy: 2.0 μm≤d3≤6.0 μm, d4≥2 mm.

6. The junction box for a photovoltaic module according to claim 4, characterized in that: The second bonding layer is an epoxy resin bonding layer, and the potting glue layer is an organic silicone layer.

7. The junction box for a photovoltaic module according to claim 1, characterized in that: The shell is a polycarbonate shell, and the wall thickness of the shell is d5, and d5 satisfies: 2.0 μm≤d5≤4.0 μm.

8. A photovoltaic module, characterized in that: It comprises a junction box for a photovoltaic module according to any one of claims 1 to 7.

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