Waterproof adhesive tape for sealing photovoltaic module and photovoltaic module
By introducing a compression buffer layer and a water-blocking functional layer into the photovoltaic module encapsulation of water-blocking tape, the problems of high encapsulation cost and complexity in the existing technology are solved, achieving efficient water blocking and buffering effects, and improving the production capacity and service life of photovoltaic modules.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- RISEN ENERGY CO LTD
- Filing Date
- 2025-05-14
- Publication Date
- 2026-05-15
AI Technical Summary
In existing photovoltaic module encapsulation, water-blocking materials are costly, have complicated manufacturing processes, and their adhesion deteriorates after long-term aging, affecting encapsulation performance and production capacity.
Design a water-blocking tape for sealing photovoltaic modules, adding a compression buffer layer, which has both water-blocking and buffering functions, replacing silicone sealant and simplifying the frame assembly process. It includes a combined structure of a compression buffer layer, a water-blocking functional layer, an adhesive layer and a release film layer.
It improves the water-blocking effect of the encapsulation, reduces encapsulation costs and time, enhances the production capacity of the components, adapts to various frame structures, and maintains stable performance over long-term use.
Smart Images
Figure CN224242988U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of water-blocking tape technology, specifically a water-blocking tape for sealing photovoltaic modules and a photovoltaic module. Background Technology
[0002] Preventing water vapor intrusion has become a basic requirement for the encapsulation of N-type photovoltaic modules with high conversion efficiency, high reliability, low temperature coefficient, and low attenuation. Currently, the main water-blocking materials for photovoltaic encapsulation include butyl rubber, water-blocking adhesive, and water-blocking tape. Among them, the dense molecular structure of butyl rubber determines its low water vapor permeability, but the high cost of equipment and materials, as well as process defects such as film puncture, prevent butyl rubber from becoming the first choice for most photovoltaic manufacturers. It is known that the currently developed water-blocking sealants are polyurethane systems, which will weaken the adhesion between the sealant and the glass after long-term aging, resulting in a significant reduction in water-blocking effect. In comparison, water-blocking tape has advantages in cost and process. Most of the water-blocking tapes that are in mass production and use are pressure-sensitive water-blocking tapes. Pressure-sensitive water-blocking tapes include a water-blocking layer and an adhesive layer. They are applied and framed after the edge trimming process of the laminate. During the frame assembly process, water-blocking tape is first pasted around the laminate, and then silicone sealant is used to further seal the frame. Silicone sealant can effectively buffer external impacts and vibrations, protecting the internal cells and welding points. However, the addition of the sealing step increases the curing time and makes the process more complicated, reducing the production capacity of the module.
[0003] Therefore, there is an urgent need to design a water-blocking tape that has good water-blocking effect and can simplify the framing process. Utility Model Content
[0004] To address the problems mentioned above, this utility model provides a water-blocking tape for sealing photovoltaic modules and a photovoltaic module. The water-blocking tape incorporates a compression buffer layer, which can replace silicone sealant to provide cushioning and shock absorption, eliminating the need for adhesive during the framing process and simplifying the framing steps.
[0005] The first objective of this utility model is to provide a water-blocking tape for sealing photovoltaic modules, the water-blocking tape comprising:
[0006] A compression buffer layer that serves as a water barrier and a buffer layer has a first surface and a second surface. A water barrier layer is provided on the first surface, and an adhesive layer or an anti-UV layer is provided on the second surface.
[0007] A water-blocking adhesive layer is provided on the surface of the water-blocking functional layer that is away from the compression buffer layer.
[0008] Furthermore, a release film layer is provided on the outer side of the adhesive layer and / or the outer side of the water-resistant adhesive layer.
[0009] Furthermore, the compression buffer layer is made of foamed material.
[0010] Furthermore, the material of the compression buffer layer includes one of the following: electron-radiated cross-linked polyethylene foam, chemically cross-linked polyethylene foam, Gooter foam, acrylic foam, irradiated cross-linked polypropylene foam, polypropylene foam material, polyurethane foam material, and foamed silicone.
[0011] Furthermore, the adhesive layer and / or the water-resistant adhesive layer are made of one of the following materials: modified polyacrylic resin adhesive, silicone adhesive, or polyurethane adhesive.
[0012] Furthermore, the water-blocking functional layer is a metal composite membrane.
[0013] Furthermore, the material of the water-blocking functional layer includes one of butyl rubber, POE, and EPE.
[0014] Furthermore, the material of the UV-resistant layer includes one of the following: polyolefin, fluorinated polymer, high bond energy film-forming resin, and UV-resistant degradation material.
[0015] The second objective of this utility model is to provide a photovoltaic module, including a laminate, wherein a water-blocking tape as described above is pasted on the side of the laminate, and the water-blocking tape is pasted on the side of the laminate through a water-blocking adhesive layer, and the second surface of the compression buffer layer of the water-blocking tape is an anti-UV layer.
[0016] Another technical solution of the photovoltaic module provided by this utility model is as follows: The photovoltaic module includes a laminate and a frame. An installation groove is formed on the frame. The laminate is installed in the installation groove by a water-blocking tape. The second surface of the compression buffer layer of the water-blocking tape is an adhesive layer. The adhesive layer is bonded to the frame, and the water-blocking adhesive layer is bonded to the laminate.
[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0018] (1) The water-blocking tape of this utility model includes a compression buffer layer. The compression buffer layer has both water-blocking and buffering functions. It maintains good elasticity after long-term compression and can provide good buffering effect with a thinner thickness. It can better match the slots of various frame structures when framing laminates. No glue is needed when framing. Only the frame needs to be assembled around the laminate. This reduces the packaging cost of using existing water-blocking tape with sealant, reduces the sealing glue application and curing time in the process, and increases production capacity.
[0019] (2) The water-blocking tape of this utility model consists of the following layers from top to bottom: release film layer + anti-UV layer (adhesive layer) + compression buffer layer + water-blocking functional layer + water-blocking adhesive layer. The water-blocking properties of the adhesive layer, the structural optimization of the compression buffer layer, and the addition of the water-blocking functional layer ensure multiple guarantees for the water-blocking effect.
[0020] (3) When the water-blocking tape of this utility model is applied to a frameless structure, an anti-UV layer is provided on the second surface of the compression buffer layer of the water-blocking tape located on the upper surface of the laminate, which can ensure the maintenance of the key performance of the water-blocking tape during long-term outdoor use in frameless sealing. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of the structure of a water-blocking tape provided in an embodiment of this application;
[0023] Figure 2 This is a schematic diagram of the structure of a water-blocking tape provided in another embodiment of this application;
[0024] Figure 3 This is a flow chart of the packaging process for pressure-sensitive water-blocking tape in the existing technology;
[0025] Figure 4 This is a flowchart of the process for sealing with framed water-blocking tape according to this application.
[0026] Figure 5 This is a flow chart of the encapsulation process for the frameless sealing water-blocking tape of this application;
[0027] Figure 6 This is a structural diagram of the frameless photovoltaic module of this application;
[0028] Figure 7 This is a structural diagram of a framed photovoltaic module according to this application;
[0029] Figure 8 This is a structural diagram of another embodiment of the framed photovoltaic module of this application;
[0030] Wherein: 1-release film layer, 2-adhesive layer, 3-compression buffer layer, 4-water-blocking functional layer, 5-water-blocking adhesive layer, 6-anti-UV layer, 7-laminated component, 8-water-blocking tape, 81-water-blocking tape for frameless application, 82-water-blocking tape for framed application, 9-frame. Detailed Implementation
[0031] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0032] The following is in conjunction with the appendix Figure 1 To be continued Figure 8 The present invention will be described in detail with specific embodiments.
[0033] like Figure 1-8 As shown, this utility model provides a water-blocking tape for sealing photovoltaic modules, comprising: a compression buffer layer 3 that provides water blocking and buffering functions; the compression buffer layer 3 has a first surface and a second surface, defined as the side closer to the laminate during use as the first surface and the side relatively farther away from the laminate as the second surface; a water-blocking functional layer 4 is provided on the first surface, and an adhesive layer 2 or an anti-UV layer 6 is provided on the second surface; this application enables the water-blocking tape to be applied to both framed and frameless laminates by providing an adhesive layer 2 or an anti-UV layer 6 on the second surface. When used as a water-blocking tape for sealing framed laminates, the adhesive layer 2 is provided on the second surface and is bonded to the frame; when used as a water-blocking tape for sealing frameless laminates, the anti-UV layer 6 is provided on the second surface, and the anti-UV layer 6, when exposed to air, ensures the maintenance of the key performance of the water-blocking tape during long-term outdoor use of the frameless laminate. A water-blocking adhesive layer 5 is provided on the surface of the water-blocking functional layer 4 on the side opposite to the compression buffer layer 3. The water-blocking adhesive layer 5 is used to adhere to the laminate and has good water-blocking performance. As the last barrier to block water vapor, the water-blocking adhesive layer 5, together with other structural layers, can further extend the service life of the component.
[0034] The water-blocking tape of this application consists of, from top to bottom: an anti-UV layer 6 or an adhesive layer 2 + a compression buffer layer 3 + a water-blocking functional layer 4 + a water-blocking adhesive layer 5. The water-blocking properties of the adhesive layer 2 and the water-blocking adhesive layer 5, the structural optimization of the compression buffer layer 3, and the addition of the water-blocking functional layer 4 ensure multiple guarantees of water-blocking performance. Simultaneously, because the compression buffer layer 3 combines water-blocking and buffering functions, it maintains good elasticity after long-term compression and provides good cushioning even at a relatively thin thickness. This allows for better matching of slots in various frame structures during laminate assembly, eliminating the need for adhesive during frame assembly; only the frame needs to be assembled around the laminate. This reduces the encapsulation cost of existing water-blocking tapes used in conjunction with sealants, shortens the sealing and curing time in the manufacturing process, and increases the production capacity of photovoltaic modules.
[0035] In some embodiments, a release film layer 1 is provided on the outer side of the adhesive layer 2 and / or the outer side of the water-blocking adhesive layer 5. It is understood that both the adhesive layer 2 and the water-blocking adhesive layer 5 are adhesive, and providing a release film layer 1 on their outer sides facilitates the use and storage of the water-blocking tape. For example, the water-blocking tape can be stored in film rolls;
[0036] When the water-blocking tape has a structure of UV-resistant layer 6 + compression buffer layer 3 + water-blocking functional layer 4 + water-blocking adhesive layer 5, the preservation of the film roll can be achieved by either providing a release film layer 1 on the outside of the water-blocking adhesive layer 5 or not providing a release film layer 1. For example, when the release film layer 1 is not provided on the outside of the water-blocking adhesive layer 5, the UV-resistant layer 6 is used as the outer side of the roll to ensure that the water-blocking tape can form a film roll structure; as another example, when the release film layer 1 is provided on the outside of the water-blocking adhesive layer 5, either the UV-resistant layer 6 or the release film layer 1 can be used as the outer side of the roll to ensure that the water-blocking tape can form a film roll structure.
[0037] When the water-blocking tape has the structure of adhesive layer 2 + compression buffer layer 3 + water-blocking functional layer 4 + water-blocking adhesive layer 5, the film can be preserved by setting a release film 1 on the outside of adhesive layer 2 or on the outside of water-blocking adhesive layer 5. Of course, the film can also be preserved by setting a release film layer 1 on both the outside of adhesive layer 2 and the outside of water-blocking adhesive layer 5.
[0038] In some embodiments, the compression buffer layer 3 is made of a foam material with a tightly packed, independently closed-cell structure. The compression buffer layer 3 can be PE-based electron-radiation cross-linked polyethylene foam, chemically cross-linked polyethylene foam, Goodyear foam, acrylic foam, or polypropylene-based irradiated cross-linked polypropylene foam, etc., or other foam materials such as polypropylene foam, polyurethane foam, or foamed silicone, but is not limited to these. Compared with existing foam substrates, the compression buffer layer 3 of this application has superior durability, maintains better elasticity after long-term compression, and provides good cushioning even at a relatively thin thickness. During the framing process of the laminated component, it can better match various frame structure slots. The compression buffer layer 3 also has water-blocking and cushioning functions, and can replace silicone sealant in the framing process to provide cushioning and shock absorption, eliminating the need for sealant application during framing; only the frame needs to be assembled around the laminated component.
[0039] In some embodiments, both the adhesive layer 2 and / or the water-blocking adhesive layer 5 are made of adhesives with water-blocking properties. Preferably, the material of the adhesive layer 2 and / or the water-blocking adhesive layer 5 includes, but is not limited to, one of modified polyacrylic resin adhesives, silicone adhesives, and polyurethane adhesives. Figure 1In the described embodiment, the main function of the adhesive layer 2 is to bond the frame. If an adhesive with water-resistant properties is selected, this adhesive layer acts as the first barrier to block water vapor molecules, which can delay the intrusion of water vapor. At the same time, in order to ensure good adhesion between the interfaces of each structure, the first and second surfaces of the compression buffer layer 3 can be surface-treated to improve the surface energy.
[0040] In some embodiments, the bonding between the UV-resistant layer 6, the compression buffer layer 3, the water-blocking functional layer 4, the water-blocking adhesive layer 5, and the adhesive layer 2, the compression buffer layer 3, the water-blocking functional layer 4, and the water-blocking adhesive layer 5 is preferably achieved using modified polyacrylic resin adhesive, silicone adhesive, or polyurethane adhesive, but is not limited to these, as long as a stable connection between the structural layers can be ensured.
[0041] In some embodiments, the water-blocking functional layer 4 is a metal composite membrane. The metal composite membrane is made of a zero-water-permeable metal material. The metal composite layer is a new material with synergistic properties formed by combining two or more materials with different physical / chemical properties. That is, the metal composite membrane is a polymer composite membrane formed by combining metal and polymer materials. The metal can be aluminum, copper, or other metals. The metal composite membrane of this application enables the water-blocking functional layer 4 to have a lower water vapor permeability. It can be seen that when a metal composite membrane is selected as the water-blocking functional layer 4, due to its special properties, the material of the compression buffer layer does not need to be considered.
[0042] In some embodiments, the water-blocking functional layer 4 is made of a thermosetting material that relies on heating to generate adhesion, such as non-polar polymeric materials with high cross-linking density, like EPE film, POE film, and butyl rubber, but not limited to these. The thermosetting material achieves its water-blocking effect through high-temperature lamination and cross-linking. It should be noted that when using a thermosetting material as the water-blocking functional layer 4, foaming materials with a wide temperature range, such as foamed silicone, are preferred for preparing the compression buffer layer 3, in order to match the usage characteristics of the thermosetting material.
[0043] In some embodiments, such as Figure 2 As shown, the material of the UV-resistant layer 6 includes, but is not limited to, one of the following: polyolefin, fluorinated polymer, high-bond-energy film-forming resin, and UV-resistant degradation material. The fluorinated polymer can be polytetrafluoroethylene, fluorinated ethylene-propylene copolymer, polyvinylidene fluoride, etc., and the high-bond-energy film-forming resin can be polyurethane system resin, polyurethane & fluorocarbon co-doped system resin, pure fluorocarbon system resin, etc., but the above materials are not the only limitations.
[0044] The advantages of this water-blocking tape will be explained below in terms of manufacturing process and usage.
[0045] like Figure 3The diagram shows a flow chart of the existing pressure-sensitive water-blocking tape encapsulation process. It reveals that the current water-blocking tape includes a water-blocking layer and an adhesive layer. After the water-blocking tape is applied around the perimeter of the laminate, it needs to be further sealed with silicone sealant to form a frame. The silicone sealant effectively buffers external impacts and vibrations, protecting the internal cells and solder joints. Therefore, the existing framing process involves at least applying water-blocking tape around the perimeter of the laminate, followed by sealing with silicone sealant. After framing, a certain amount of time is required for the silicone sealant to cure before the module can be produced. This not only increases the module encapsulation cost and time but also results in lower production capacity.
[0046] like Figure 4 The image shows the water-blocking tape of this application used as a bordered sealing tape, in conjunction with... Figure 3 Compared with existing technologies, this method involves laminating the glass, trimming the edges after lamination, attaching the water-blocking tape of this application around the laminate, and finally assembling the frame. Since the entire process does not rely on silicone sealant to seal the frame, it not only saves encapsulation time and reduces the encapsulation cost of the module, but also increases production capacity.
[0047] like Figure 5 The image shows the application of this water-blocking tape as a frameless sealing tape. After lamination, the edges are trimmed, and then the water-blocking tape of this application is pasted on. Because the frame assembly step is omitted, the packaging cost of the component is reduced, while the production capacity is increased.
[0048] See Figure 6 This application also provides a photovoltaic module, including a laminate 7, the laminate 7 having a frameless structure, and one or more sides of the laminate 7 having a water-blocking tape 8 of this application pasted on them. The water-blocking tape 8 includes an anti-UV layer 6, a compression buffer layer 3, a water-blocking functional layer 4, and a water-blocking adhesive layer 5 arranged sequentially from the outside to the inside. The anti-UV layer 6 can be exposed to air, while the water-blocking adhesive layer 5 is bonded to the laminate.
[0049] See Figure 7 and Figure 8 Some other embodiments of the photovoltaic module of this application are as follows: The photovoltaic module includes a frame 9 and a laminate 7. A mounting groove is formed on the frame 9. The laminate 7 is installed in the mounting groove using the water-blocking tape 8 of this application. The second surface of the compression buffer layer 3 of the water-blocking tape 8 is an adhesive layer 2. The adhesive layer 2 is bonded to the frame 9, and the water-blocking adhesive layer 5 is bonded to the laminate 7. For example, see [reference needed]. Figure 7, an "L"-shaped mounting notch is formed on the frame 9, and the laminate 7 is installed in the "L"-shaped mounting notch through the water-blocking tape 8. On the second surface of the compression buffer layer 3 of the water-blocking tape 82 at the position where the laminate 4 contacts the frame, there is an adhesive layer 2. On the second surface of the compression buffer layer 3 of the water-blocking tape 81 without a frame at the part where the laminate does not contact the frame (that is, the upper surface of the laminate), an anti-UV layer 6 is provided, and the anti-UV layer 6 is exposed to the air. The water-blocking adhesive layer 5 is bonded to the laminate 7. Refer to Figure 8 , in another example, a "匚"-shaped mounting notch is formed on the frame 9, and the laminate 7 is installed in the "匚"-shaped mounting notch through the water-blocking tape 8 of the present application. An adhesive layer 2 is provided on the second surface of the compression buffer layer 3 of the water-blocking tape. The adhesive layer 2 is bonded to the frame 9, and the water-blocking adhesive layer 5 is bonded to the laminate 7.
[0050] The above further describes the present invention with the help of specific embodiments. However, it should be understood that the specific description here should not be construed as a limitation on the essence and scope of the present invention. Various modifications made by those of ordinary skill in the art to the above embodiments after reading this specification all fall within the scope protected by the present invention.
Claims
1. A water-blocking tape for sealing photovoltaic modules, characterized in that, The water-blocking tape includes: A compression buffer layer that serves as a water barrier and a buffer layer, the compression buffer layer having a first surface and a second surface, a water barrier layer being disposed on the first surface, and an adhesive layer or a UV-resistant layer being disposed on the second surface. A water-blocking adhesive layer is provided on the surface of the water-blocking functional layer opposite to the compression buffer layer.
2. The water-blocking tape for sealing photovoltaic modules according to claim 1, characterized in that, A release film layer is provided on the outer side of the adhesive layer and / or the outer side of the water-resistant adhesive layer.
3. The water-blocking tape for sealing photovoltaic modules according to claim 1, characterized in that, The compression buffer layer is made of foam material.
4. The water-blocking tape for sealing photovoltaic modules according to claim 3, characterized in that, The material of the compression buffer layer includes one of the following: electron-radiation cross-linked polyethylene foam, chemically cross-linked polyethylene foam, Gooter foam, acrylic foam, irradiated cross-linked polypropylene foam, polypropylene foaming material, polyurethane foaming material, and foamed silicone.
5. The water-blocking tape for sealing photovoltaic modules according to claim 1, characterized in that, The adhesive layer and / or water-resistant adhesive layer are made of one of the following materials: modified polyacrylic resin adhesive, silicone adhesive, or polyurethane adhesive.
6. The water-blocking tape for sealing photovoltaic modules according to claim 1, characterized in that, The water-blocking functional layer is a metal composite membrane.
7. The water-blocking tape for sealing photovoltaic modules according to claim 1, characterized in that, The material of the water-blocking functional layer includes one of butyl rubber, POE film, and EPE film.
8. The water-blocking tape for sealing photovoltaic modules according to claim 1, characterized in that, The material of the UV-resistant layer includes one of the following: polyolefin, fluorinated polymer, high bond energy film-forming resin, and UV-resistant degradation material.
9. A photovoltaic module, characterized in that, The invention includes a laminate, wherein a water-blocking tape as described in any one of claims 1-8 is adhered to the side of the laminate, and the water-blocking tape is adhered to the side of the laminate through the water-blocking adhesive layer, wherein the second surface of the compression buffer layer of the water-blocking tape is an anti-UV layer.
10. A photovoltaic module, characterized in that, The device includes a laminate and a frame, wherein a mounting groove is formed on the frame, the laminate is installed in the mounting groove by means of the water-blocking tape according to any one of claims 1-8, and the second surface of the compression buffer layer of the water-blocking tape is an adhesive layer, the adhesive layer is bonded to the frame, and the water-blocking adhesive layer is bonded to the laminate.