Water-blocking adhesive tape and photovoltaic module

Abstract

The utility model discloses a water-blocking adhesive tape and a photovoltaic module, and relates to the technical field of photovoltaics. The water-blocking adhesive tape comprises a base material layer and a first adhesive layer which are arranged in a stacked mode, the first adhesive layer is used for being pasted on the surface of a laminated piece of a photovoltaic module, and the base material layer comprises a metal water-blocking layer and a supporting layer which are arranged in a stacked mode. The base material layer of the water-blocking adhesive tape is of a composite layer structure and comprises the metal water-blocking layer, the water permeability of the metal water-blocking layer is 0, and the water-blocking adhesive tape has a very strong water-blocking effect. Therefore, compared with the prior art in which the base material layer of the water-blocking adhesive tape adopts a single organic layer structure, the water-blocking adhesive tape provided by the embodiment of the utility model can have relatively high water-blocking performance without a relatively large thickness. The photovoltaic module provided by the embodiment of the utility model comprises the water-blocking adhesive tape, and the water-blocking adhesive tape is adhered to the edge of the laminated piece, so that water vapor can be effectively prevented from entering the laminated piece from the edge of the laminated piece to influence the performance of a battery piece.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, and in particular to a water-blocking tape and a photovoltaic assembly. Background Art

[0002] At present, the main water-blocking sealing methods around photovoltaic modules are butyl rubber, water-blocking glue and water-blocking tape. The water-blocking technology of butyl rubber sealing is relatively mature, and the results of relevant test data show that the effective water-blocking width of butyl rubber sealing is ≥7mm. The construction process of water-blocking glue is the same as that of silicone sealant. It can be assembled after applying glue in the frame cavity. The water-blocking tape needs to be pasted around the laminate and sealed with silicone glue for water blocking. In the related technology, the water-blocking tape is composed of a substrate layer, an adhesive layer and a release film, and the substrate layer has insulation and water-blocking properties. However, the substrate layer structure in the related technology is single, such as a single-layer structure made of only polyethylene terephthalate or other organic materials, so the water-blocking performance is poor, resulting in poor performance stability and short life of photovoltaic modules. Utility Model Content

[0003] The utility model aims to provide a water-blocking tape and a photovoltaic module. The water-blocking tape has better water-blocking performance, so that the photovoltaic module has better performance stability and a shorter lifespan.

[0004] The embodiment of the utility model is achieved as follows:

[0005] In a first aspect, the utility model provides a water-blocking tape for waterproofing a photovoltaic module, wherein the water-blocking tape comprises a stacked substrate layer and a first adhesive layer, wherein the first adhesive layer is used to be adhered to the surface of a laminate of the photovoltaic module, and the substrate layer comprises a stacked metal water-blocking layer and a support layer.

[0006] In an optional embodiment, the first adhesive layer is disposed on a side of the support layer away from the metal water-blocking layer;

[0007] Alternatively, the first adhesive layer is disposed on a side of the metal water-blocking layer away from the support layer;

[0008] Alternatively, at least one of the support layer and the metal water-blocking layer is in plural number, and the support layer and the metal water-blocking layer are alternately arranged.

[0009] In an optional embodiment, the metal water-blocking layer is made of aluminum.

[0010] In an optional embodiment, the metal water-blocking layer and the supporting layer are connected via a second adhesive layer;

[0011] Alternatively, the metal water-blocking layer and the supporting layer are connected by an evaporation process.

[0012] In an alternative embodiment, the material of the second adhesive layer is a polyurethane-based adhesive.

[0013] In an alternative embodiment, the material of the support layer is polyethylene terephthalate or polyvinylidene fluoride or polypropylene.

[0014] In an alternative embodiment, the first adhesive layer is a pressure-sensitive adhesive, a thermosetting adhesive or a hot-melt adhesive;

[0015] Alternatively, the material of the first adhesive layer is rubber-based, resin-based or polyolefin-based.

[0016] In an alternative embodiment, the total thickness of the substrate layer and the first adhesive layer is 40 μm to 350 μm.

[0017] In an alternative embodiment, the thickness of the metal water barrier layer is 6 μm to 20 μm;

[0018] And / or, the thickness of the second adhesive layer is 1 μm to 10 μm;

[0019] And / or, the thickness of the support layer is 10 μm to 20 μm;

[0020] And / or, the thickness of the first adhesive layer is 15 μm to 30 μm.

[0021] In an alternative embodiment, the water-blocking tape further includes a release film laminated on a side of the first adhesive layer facing away from the substrate layer.

[0022] In a second aspect, an embodiment of the present application provides a photovoltaic module, including a frame, a laminate, an adhesive structure, and the water-blocking tape according to any one of the embodiments in the first aspect, and the water-blocking tape is adhered to an edge of the laminate through the first adhesive layer.

[0023] In an alternative embodiment, the laminate includes a light-receiving surface, a light-emitting surface, and a side surface connecting between the light-receiving surface and the light-emitting surface, and the first adhesive layer is adhered to at least one of the light-receiving surface, the light-emitting surface, and the side surface.

[0024] In an alternative embodiment, the first adhesive layer is adhered to the light-receiving surface, the light-emitting surface, and the side surface so that the water-blocking tape wraps the edge.

[0025] The beneficial effects of the embodiments of the present utility model are:

[0026] The water-blocking tape provided by the embodiment of the present application includes a substrate layer and a first adhesive layer arranged in a stacked manner. The first adhesive layer is used to adhere to the surface of the laminate of the photovoltaic module. The substrate layer includes a metal water-blocking layer and a support layer arranged in a stacked manner. The substrate layer of the water-blocking tape of the present application has a composite layer structure, including a metal water-blocking layer. The water permeability of the metal water-blocking layer is 0, and it has an extremely strong water-blocking effect. Therefore, compared with the substrate layer of the water-blocking tape in the related art that adopts a single organic layer structure, the water-blocking tape provided by the embodiment of the present application can have strong water-blocking performance without a relatively large thickness.

[0027] The photovoltaic module provided by the embodiment of the present application includes the above-mentioned water-blocking tape. The water-blocking tape is adhered to the edge of the laminate, and can effectively prevent water vapor from entering the interior of the laminate from the edge and affecting the performance of the solar cell. Therefore, the photovoltaic module provided by the embodiment of the present application has better performance stability and a longer lifespan. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0029] Figure 1 It is a cross-sectional view of the water-blocking tape in an embodiment of the present application;

[0030] Figure 2 It is a cross-sectional view of the water-blocking tape in another embodiment of the present application;

[0031] Figure 3 It is a cross-sectional view of the edge of the laminate wrapped with the water-blocking tape in an embodiment of the present application;

[0032] Figure 4 It is a partial cross-sectional view of the photovoltaic module in an embodiment of the present application.

[0033] Reference numerals: 100 - water-blocking tape; 110 - substrate layer; 111 - metal water-blocking layer; 112 - support layer; 113 - second adhesive layer; 120 - first adhesive layer; 130 - release film; 200 - laminate; 201 - light-receiving surface; 202 - backlight surface; 203 - side surface; 210 - first panel; 220 - first adhesive film; 230 - solar cell layer; 240 - second adhesive film; 250 - second panel; 300 - frame; 310 - mounting groove; 400 - bonding structure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. The components of the embodiments of the present utility model usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0036] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not require further definition and explanation in subsequent drawings.

[0037] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0038] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0039] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "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 directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] The water-blocking tape applied to photovoltaic modules has a certain water-blocking effect and needs to be used in combination with silicone glue. The water-blocking tape is used for water-blocking, and the silicone glue is mainly used for bonding and fixing. The use of the water-blocking tape adds a new interface to the original structure bonded by silicone glue. This interface reduces the effective bonding width between the original silicone glue and the laminate, presenting potential water-blocking and load risks. In related technologies, the water-blocking tape consists of a base layer and an adhesive layer. The base layer functions as a waterproof layer, and the adhesive layer is used to bond to the laminate. However, the base layer structure of the water-blocking tape in related technologies is single, such as using a single-layer organic layer, and the waterproof effect of this base layer is poor. In addition, the mechanical properties of the base layer with such a single organic layer structure are not good. If the thickness of the base layer is increased from the perspective of improving mechanical strength and waterproof performance, it will lead to poor adhesion between the water-blocking tape and the laminate.

[0041] To improve at least one of the deficiencies in related technologies, an embodiment of the present application provides a water-blocking tape. By setting the base layer as a composite layer structure, which includes a metal water-blocking layer, the water-blocking performance of the water-blocking tape is good. In addition, an embodiment of the present application also provides a photovoltaic module that uses the water-blocking tape provided by the embodiment of the present application.

[0042] Figure 1 It is a cross-sectional view of the water-blocking tape 100 in an embodiment of the present application; Figure 2 It is a cross-sectional view of the water-blocking tape 100 in another embodiment of the present application. As Figure 1 and Figure 2 shown, the water-blocking tape 100 includes a base layer 110 and a first adhesive layer 120 that are stacked. The first adhesive layer 120 is used to paste on the surface of the laminate 200 of the photovoltaic module. The base layer 110 includes a support layer 112 and a metal water-blocking layer 111 that are stacked. In addition, the water-blocking tape 100 of this embodiment further includes a release film 130. The release film 130 is stacked on the side of the first adhesive layer 120 facing away from the base layer 110. The function of the release film 130 is to protect the first adhesive layer 120 when the water-blocking tape 100 is not in use; when pasting the water-blocking tape 100, the release film 130 needs to be torn off to expose the first adhesive layer 120.

[0043] In the water-blocking tape 100 of the embodiment of the present application, the base layer 110 includes a metal water-blocking layer 111. The water permeability of the metal water-blocking layer 111 is almost zero. Therefore, the base layer 110 can ensure excellent water-blocking performance without excessive thickness. At the same time, the metal water-blocking layer 111 also has good mechanical strength, so the requirement for the thickness of the support layer 112 can be reduced.

[0044] Optionally, the first adhesive layer 120 is disposed on the side of the metal water-blocking layer 111 facing away from the support layer 112 and is directly attached to the metal water-blocking layer 111, so that the support layer 112 forms the non-bonding surface of the water-blocking tape 100 (as Figure 1In other optional embodiments, the first adhesive layer 120 can also be attached to the side of the support layer 112 away from the metal water-blocking layer 111, so that the metal water-blocking layer 111 forms a non-adhesive surface of the water-blocking tape 100 (such as Figure 2 In some other embodiments, the number of at least one of the metal water-blocking layer 111 and the support layer 112 is more than two, and the metal water-blocking layer 111 and the support layer 112 are alternately arranged; for example, the water-blocking tape 100 has two support layers 112 and one metal water-blocking layer 111, and the support layer 112, the metal water-blocking layer 111, the support layer 112, and the first adhesive layer 120 are stacked in sequence.

[0045] In this embodiment, the material of the metal water-blocking layer 111 is aluminum. In other words, the metal water-blocking layer 111 is aluminum foil. Aluminum has a lower density and cost, and better water-blocking properties. In other optional embodiments, the material of the metal water-blocking layer 111 can also be other metals or alloys, such as copper foil or tin foil. When the metal water-blocking layer 111 is an alloy, it can be an alloy containing any one or more of aluminum, copper, tin, and magnesium.

[0046] Furthermore, the material of the support layer 112 is a polymer material. Optionally, the material of the support layer 112 is at least one of polyethylene terephthalate (PET), polyvinylidenedifluoride (PVDF) and polypropylene (PP). The support layer 112 mainly plays a structural support role, so that the water-blocking tape 100 meets certain mechanical properties, such as tensile strength. And the support layer 112 also has certain water-blocking properties, which can effectively prevent water vapor from passing through the water-blocking tape 100.

[0047] In this embodiment, the metal water-blocking layer 111 and the support layer 112 are connected by a second adhesive layer 113. Optionally, the second adhesive layer 113 is made of a polyurethane adhesive. Polyurethane adhesives have high mechanical strength and good weather resistance, and are suitable for bonding between metals and non-metals. Therefore, they are suitable for bonding between the metal water-blocking layer 111 and the support layer 112 in this embodiment.

[0048] In other optional embodiments, the metal water-blocking layer 111 and the supporting layer 112 may be directly connected, for example, by using an evaporation process to attach one to the other.

[0049] Further, the first adhesive layer 120 is a pressure-sensitive adhesive, a thermosetting adhesive or a hot-melt adhesive. It should be understood that the first adhesive layer 120 needs to be bonded to the laminate 200 (see Figure 3) Adhesion is carried out, and its performance affects the adhesion stability, conformability, and load risk of the water-blocking tape 100. In this embodiment, a pressure-sensitive adhesive is used as the first adhesive layer 120. During the process of pasting the water-blocking tape 100, no solvents, heat, or other means are required, and only an appropriate amount of pressure needs to be applied to generate a large adhesive strength. When the laminate 200 is subsequently framed, the water-blocking tape 100 can achieve a good adhesive effect under the continuous extrusion of the adhesive structure 400 (see Figure 4 ). Starting from the material, the material of the first adhesive layer 120 can be rubber-based, resin-based, or polyolefin-based.

[0050] In the embodiment of the present application, the mechanical properties of the water-blocking tape 100 are closely related to the thickness of the support layer 112. Optionally, the thickness range of the support layer 112 is 10 μm to 40 μm. Further, the thickness of the support layer 112 is 10 μm to 20 μm. If the support layer 112 is too thick, the overall texture of the water-blocking tape 100 will be too hard and the conformability will be poor; if it is too thin, the mechanical strength will be low, and there will be process problems, and the water-blocking tape 100 will be broken during the pasting process. In addition to improving the mechanical properties by adjusting the thickness of the support layer 112, the added metal water-blocking layer 111 in the embodiment of the present application also has a certain mechanical strength and can improve the mechanical properties of the water-blocking tape 100.

[0051] In this embodiment, the support layer 112 is provided on only one side of the metal water-blocking layer 111; in alternative other embodiments, two support layers 112 can also be used, and the two support layers 112 are respectively provided on opposite sides of the metal water-blocking layer 111 to clamp the metal water-blocking layer 111, so that the mechanical properties of the substrate layer 110 are better.

[0052] Optionally, the thickness of the metal water-blocking layer 111 is 6 μm to 20 μm; and / or, the thickness of the second adhesive layer 113 is 1 μm to 10 μm; and / or, the thickness of the support layer 112 is 10 μm to 20 μm; and / or, the thickness of the first adhesive layer 120 is 15 μm to 300 μm.

[0053] The following table shows the thickness selection ranges of each layer of the water-blocking tape 100 in the embodiment of the present application.

[0054]

[0055]

[0056] In the embodiments in the above table, the total thickness range of the substrate layer 110 and the first adhesive layer 120 is 40 μm to 350 μm. The tensile strength of the substrate layer 110 can reach 30 MPa to 60 MPa, and the elongation at break reaches 40% to 140%, both of which can meet the usage requirements of the water-blocking tape 100 on the laminate 200.

[0057] In this embodiment, the material of the release film 130 can be selected from polymer materials, such as polyester (such as PET), polyolefin (such as HDPE, OPP) and other polymer materials. Considering the manufacturing process, there are also certain requirements for the mechanical properties of the release film 130. After peeling, the release film 130 will be wound up, and the strength of the release film 130 needs to ensure that it will not break during the winding process. Therefore, in this embodiment, the thickness of the release film 130 is set to 10 μm to 30 μm, which can meet the winding requirements. In other alternative embodiments, the release film 130 can also be omitted in the water-blocking tape 100, so as to avoid the risk of the release film 130 breaking during winding.

[0058] The thickness of the first adhesive layer 120 is selected to be 15 μm to 300 μm, which can meet the interface water-blocking requirements. In addition, an appropriate amount of hydrophobic groups (such as modified epoxy / polyurethane, silicone) can also be introduced into the first adhesive layer 120. Hydrolysis resistance and high-temperature resistance are the key properties that the adhesive should consider to ensure the effectiveness of the water-blocking tape 100 in an aging environment of temperature (85±2)°C and humidity (85±5)%, so as to ensure the structural reliability and waterproof reliability when applied to photovoltaic modules.

[0059] Figure 3 It is a cross-sectional view of the edge of the laminate 200 wrapped with the water-blocking tape 100 in an embodiment of the present application; Figure 4 It is a partial cross-sectional view of a photovoltaic module in an embodiment of the present application. As Figure 3 and Figure 4 As described above, the photovoltaic module provided by the embodiment of the present application includes a frame 300, a laminate 200, an adhesive structure 400 and the water-blocking tape 100 provided in the above embodiment. The water-blocking tape 100 is pasted on the edge of the laminate 200 through the first adhesive layer 120, the adhesive structure 400 covers the water-blocking tape 100, and the laminate 200 is connected to the frame 300 through the adhesive structure 400. The laminate 200 includes a first panel 210, a first adhesive film 220, a cell layer 230, a second adhesive film 240 and a second panel 250 which are sequentially stacked. The first panel 210 forms the light-receiving surface 201 of the laminate 200, and the second panel 250 forms the backlight surface 202 of the laminate 200. By pasting the water-blocking tape 100 on the edge of the laminate 200 and utilizing the better water-blocking performance of the water-blocking tape 100, it can prevent water vapor from entering the inside of the laminate 200 from the edge side surface 203 of the laminate 200, thereby avoiding the cell layer 230 from being invaded by water vapor.

[0060] In the embodiments of the present application, the laminate 200 further has a side surface 203 connected between the light-receiving surface 201 and the backlight surface 202. Optionally, the first adhesive layer 120 of the water-blocking tape 100 is adhered to at least one of the light-receiving surface 201, the backlight surface 202, and the side surface 203. Since water vapor tends to enter the interior of the laminate 200 through the side surface 203, in this embodiment, the first adhesive layer 120 of the water-blocking tape 100 is adhered to the light-receiving surface 201, the backlight surface 202, and the side surface 203 so that the water-blocking tape 100 wraps the edge of the laminate 200. It can be understood that in this embodiment, the water-blocking tape 100 completely covers the side surface 203 of the laminate 200 and extends to the light-receiving surface 201 and the backlight surface 202 and covers a certain width, which can improve the waterproof effect on the edge of the laminate 200.

[0061] As Figure 4 shown, an installation groove 310 is formed on the frame 300, and the edge of the laminate 200 wrapped with the water-blocking tape 100 extends into the installation groove 310, and the installation groove 310 is filled with an adhesive structure 400, and the adhesive structure 400 can limit the edge of the laminate 200 in the installation groove 310. The material of the adhesive structure 400 can be selected as silicone glue or silica gel. The shear strength of the silicone glue as the adhesive structure 400 ≥ 1.3 MPa, and the shear strength of the water-blocking tape 100 of the photovoltaic module is about 0.3 MPa. Therefore, the tensile property under the shear load is far inferior to that of the silicone glue. So after the water-blocking tape 100 is pasted around the laminate 200, a certain area needs to be reserved for the adhesive structure 400 to bond with the laminate 200 to ensure the load reliability. It should be understood that the adhesive structure 400 needs to be directly adhered to the surface of the laminate 200 to ensure the stability of the laminate 200 relative to the frame 300. Therefore, the adhesive structure 400 completely covers the water-blocking tape 100 and extends beyond the edge of the water-blocking tape 100, and the extended part is directly adhered to the light-receiving surface 201 and the backlight surface 202 of the laminate 200. The width of the area where the adhesive structure 400 is directly adhered to the light-receiving surface 201 and the backlight surface 202 of the laminate 200 is the effective bonding width of the adhesive structure 400.

[0062] It can be seen that the effective bonding width of the adhesive structure 400 is related to the bonding width W1 of the water-blocking tape 100 on the light-receiving surface 201 and the bonding width W2 of the water-blocking tape 100 on the backlight surface 202. And when the thickness of the laminate 200 is certain, the bonding widths W1 and W2 are related to the width of the water-blocking tape 100. The following table is the analysis of the water penetration risk and load risk of the water-blocking tape 100 with different widths.

[0063]

[0064]

[0065] The thickness of the laminate 200 used in the above table is 5 mm, so the bonding width of the side 203 of the water-blocking tape 100 is constant. The effective water-blocking width of the water-blocking tape 100 is defined as: the distance that water vapor invades into the interior of the laminate 200 along the bonding interface of the water-blocking tape 100 from the light-receiving surface 201 of the laminate 200, that is, the bonding width W1 of the water-blocking tape 100 on the light-receiving surface 201 plus the thickness of the first panel 210 covered by the water-blocking tape 100 at the position of the side 203 (because water vapor can penetrate into the laminate 200 from the gap between the first panel 210 and the first adhesive film 220. In this embodiment, the thickness of the first panel 210 is 2 mm).

[0066] As can be seen from the above table, the wider the width of the water-blocking tape 100, the larger the bonding widths W1 and W2 of the light-receiving surface 201 and the backlight surface 202 will be. The effective water-blocking width of the water-blocking tape 100 will increase, and the water penetration risk will decrease. However, as the width of the water-blocking tape 100 increases, the effective bonding width of the bonding structure 400 will decrease, resulting in an increased load risk. In the above table, the water-blocking tape 100 is centered and pasted, that is, the bonding widths W1 and W2 of the light-receiving surface 201 and the backlight surface 202 are equal. In fact, if the laminate 200 is misaligned or the edge trimming is not clean, the water-blocking tape 100 will not be centered and pasted. This will not only easily cause the narrow water-blocking tape 100 to lack local coverage at the edge of the laminate 200, increasing the water penetration risk, but also increase the load risk of the wider water-blocking tape 100 or expose the water-blocking tape 100 after framing. Therefore, considering the load risk and the water-blocking effect comprehensively, the width of the water-blocking tape 100 is selected to be 10 mm.

[0067] Considering that the requirements for the long side and the short side of the laminate 200 to bear the load are different, the specifications of the water-blocking tape 100 used on the long side and the short side can be different. For example, if the risk of the long side being out of the frame is high, the width of the selected water-blocking tape 100 can be 10 mm; if the risk of the short side being out of the frame is low, the width of the selected water-blocking tape 100 can be 12 - 14 mm to increase the water-blocking performance of the short side.

[0068] The manufacturing process of the photovoltaic module is as follows:

[0069] First, stack the various layer structures of the laminate 200, and after lamination, trim the edges to form the laminate 200; paste the water-blocking tape 100 on the edge of the laminate 200; install the laminate 200 with the water-blocking tape 100 pasted thereon into the frame 300; install the junction box; cure to make the adhesive structure firmly bonded; test.

[0070] In a specific embodiment, the manufacturing requirements of the photovoltaic module are as follows:

[0071] 1) The edge trimming process before pasting the water-blocking tape 100 should ensure that the edge trimming is clean and complete, without burrs and residual glue.

[0072] 2) Frame the device to ensure sufficient use of the bonding structure 400, and ensure that the width of the direct bonding between the light-receiving surface 201 and the bonding structure 400 after the frame is sealed is ≥ 5 mm.

[0073] 3) The water-blocking tape 100 shall not be exposed after framing.

[0074] In a specific embodiment, the pasting parameters and requirements of the water-blocking tape 100 are as follows:

[0075] 1) The pasting width W1 of the laminate 200 on the light-receiving surface 201 ≤ 2.5 mm, and the pasting width W2 on the backlight surface 202 ≤ 5 mm (this pasting parameter is designed with the water-blocking tape 100 with a width of 10 mm as an example), ensure tight pressing, allow wrinkles, and do not allow warping.

[0076] 2) The water-blocking tape 100 on the side 203 of the laminate 200 shall be ensured to be pasted tightly, without obvious bulges, no damage is allowed, and wrinkles are allowed.

[0077] 3) Ensure that the back water-blocking tape 100 wraps the corners of the laminate 200 without exposure.

[0078] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A water-blocking tape for waterproofing of photovoltaic modules, characterized in that, The water-blocking tape comprises a laminated substrate layer and a first adhesive layer, wherein the first adhesive layer is used to be adhered to the surface of the laminate of the photovoltaic module, and the substrate layer comprises a laminated metal water-blocking layer and a supporting layer.

2. The water-blocking tape according to claim 1, characterized in that, The first adhesive layer is arranged on a side of the support layer away from the metal water-blocking layer; Alternatively, the first adhesive layer is disposed on a side of the metal water-blocking layer away from the supporting layer; Alternatively, the number of at least one of the support layer and the metal water-blocking layer is two or more, and the support layer and the metal water-blocking layer are alternately arranged.

3. The water-blocking tape according to claim 1, wherein The material of the metal water-blocking layer is aluminum.

4. The water-blocking tape according to claim 2, wherein The metal water-blocking layer and the supporting layer are connected via a second adhesive layer; Alternatively, the metal water-blocking layer and the supporting layer are connected by an evaporation process.

5. The water-blocking tape according to claim 4, wherein, The material of the second adhesive layer is polyurethane adhesive.

6. The water-blocking tape according to claim 1, wherein The support layer is made of polyethylene terephthalate, polyvinylidene fluoride or polypropylene.

7. The water-blocking tape according to claim 1, characterized in that, The first adhesive layer is a pressure-sensitive adhesive, a thermosetting adhesive or a hot-melt adhesive; Alternatively, the first adhesive layer is made of rubber, resin or polyolefin.

8. The water-blocking tape according to claim 1, characterized in that, The total thickness of the substrate layer and the first adhesive layer is 40 μm to 350 μm.

9. The water-blocking tape according to claim 1, wherein The thickness of the metal water-blocking layer is 6 μm to 20 μm; And / or, the thickness of the support layer is 10 μm to 20 μm; And / or, the thickness of the first adhesive layer is 15 μm to 300 μm.

10. The water-blocking tape according to any one of claims 1-9, characterized in that, The water-blocking tape further includes a release film laminated on a side of the first adhesive layer facing away from the substrate layer.

11. A photovoltaic module, characterized in that, The invention comprises a frame, a laminate, an adhesive structure and the water-blocking tape according to any one of claims 1 to 9, wherein the water-blocking tape is adhered to the edge of the laminate through the first adhesive layer.

12. The photovoltaic module according to claim 11, wherein, The laminate comprises a light-receiving surface, a backlight surface, and a side surface connected between the light-receiving surface and the backlight surface, and the first adhesive layer is bonded to at least one of the light-receiving surface, the backlight surface, and the side surface.

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