Photovoltaic module

Abstract

The application relates to the photovoltaic technical field and discloses a photovoltaic module. The photovoltaic module comprises a laminated piece, an edge sealing adhesive tape and a frame. The laminated piece comprises a first surface and a second surface arranged oppositely. The edge sealing adhesive tape is sequentially provided with a substrate layer, an insulating layer and an adhesive layer. The adhesive layer comprises a first adhesive part and a second adhesive part arranged at intervals and a third adhesive part located between the first adhesive part and the second adhesive part. The first adhesive part is attached to the first surface, the second adhesive part is attached to the second surface, and the third adhesive part is attached to the side surface of the laminated piece. The water permeability of the first adhesive part and the water permeability of the second adhesive part are less than or equal to 1 g / m 2 . The frame is provided with a containing groove, and the edge of the laminated piece and the edge sealing adhesive tape are located in the containing groove. The photovoltaic module provided by the application can be beneficial to ensuring the use reliability of the photovoltaic module.

Description

Technical Field

[0001] This application relates to the field of photovoltaic technology, and in particular to a photovoltaic module. Background Technology

[0002] With the continuous development of photovoltaic power generation technology, the installed capacity of photovoltaic modules is also constantly increasing. Photovoltaic modules are formed by encapsulating solar cells. These cells have the photovoltaic effect, which enables them to generate current under the illumination of sunlight, thereby generating electricity and outputting electrical energy to the outside world.

[0003] After photovoltaic modules are encapsulated, a protective structure is formed at the edges. This protective structure can block moisture and corrosive substances from entering the photovoltaic module and causing corrosion. Given the complexity of the external environment, ensuring the reliability of photovoltaic modules is an important issue. Utility Model Content

[0004] The purpose of this application is to provide a photovoltaic module that can help ensure the reliability of photovoltaic module use.

[0005] To address the aforementioned technical problems, this application provides a photovoltaic module. The photovoltaic module includes a laminate, edge-sealing tape, and a frame. The laminate includes a first surface and a second surface disposed opposite to each other. The edge-sealing tape is sequentially provided with a substrate layer, an insulating layer, and an adhesive layer. The adhesive layer includes a first adhesive portion and a second adhesive portion spaced apart, and a third adhesive portion located between the first and second adhesive portions. The first adhesive portion is adhered to the first surface, the second adhesive portion is adhered to the second surface, and the third adhesive portion is adhered to the side surface of the laminate. The water permeability of the first adhesive portion and the water permeability of the second adhesive portion are less than or equal to 1 g / m³. 2 The frame is provided with receiving grooves, and the edges of the laminate and the sealing tape are located in the receiving grooves.

[0006] The photovoltaic module provided in this application has edge-sealing tape and a frame respectively applied to the edges of the laminate. The edge-sealing tape wraps around the edges of the laminate, and the receiving groove of the frame accommodates the edges of the laminate and the edge-sealing tape. The adhesive layer of the edge-sealing tape includes multiple parts, which are respectively adhered to different surfaces of the laminate. The water permeability of the first adhesive portion and the second adhesive portion near the edge of the adhesive layer is less than or equal to 1 g / m². 2 This allows the adhesive layer to effectively block moisture and corrosive substances from penetrating the front and back of the laminate, thereby ensuring the reliability of the photovoltaic module formed after sealing with edge tape and frame.

[0007] In some embodiments, the water permeability of the third adhesive portion is greater than or equal to the water permeability of the first adhesive portion. This allows the adhesive layer to be configured in various ways by controlling the water permeability of the middle portion.

[0008] In some embodiments, the water permeability of the adhesive layer is 0.1 g / m³. 2 Up to 0.5g / m 2 In this way, by controlling the overall water permeability of the adhesive layer within a certain range, the water vapor barrier performance of the insulating tape can be effectively ensured.

[0009] In some embodiments, the adhesive layer includes a non-adhesive portion, and the first adhesive portion and / or the second adhesive portion have perforated areas. The non-adhesive portion fills the perforated areas, and the water permeability of the non-adhesive portion is lower than that of the first and second adhesive portions. Thus, by including a non-adhesive portion with low water permeability in the adhesive layer, the moisture barrier effect of the adhesive layer can be effectively improved.

[0010] In some embodiments, the non-adhesive portion extends in a direction intersecting the width direction of the first adhesive portion. This allows for control of the extension direction of the non-adhesive portion, ensuring its ability to block moisture intrusion.

[0011] In some embodiments, there are multiple non-adhesive portions, which are spaced apart from each other. In this way, by providing multiple non-adhesive portions, the water vapor barrier performance can be enhanced at multiple different locations.

[0012] In some embodiments, the photovoltaic module further includes a sealing portion disposed at the edge of the first adhesive portion away from the third adhesive portion and / or at the edge of the second adhesive portion away from the third adhesive portion. This ensures a tight seal at the edge of the sealing tape by providing the sealing portion at the edge of the sealing tape.

[0013] In some embodiments, the thickness of the sealing portion in the first direction is greater than the thickness of the adhesive layer in the first direction, which is parallel to the thickness direction of the laminate. This allows for control of the thickness of the sealing portion, ensuring sufficient sealing at the edges of the sealing tape.

[0014] In some embodiments, the widths of the first and second adhesive portions are greater than or equal to 5 mm and less than or equal to 10 mm. This ensures that creepage design requirements are met and avoids adverse light-blocking effects on the laminate by controlling the width of the adhesive portion near the edge of the adhesive layer within a certain range.

[0015] In some embodiments, the edge sealing tape is located inside the edge of the frame in the thickness direction of the laminate. This allows the physical barrier effect of the frame to be fully utilized by ensuring that the edge sealing tape does not protrude beyond the edge of the frame in the thickness direction of the laminate. Attached Figure Description

[0016] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0017] Figure 1 These are schematic diagrams of the structure of photovoltaic modules under certain circumstances as described in this application;

[0018] Figure 2 These are schematic diagrams of photovoltaic modules under other circumstances described in this application;

[0019] Figure 3 This is a schematic diagram of the structure at the edge of the photovoltaic module in other cases according to this application;

[0020] Figure 4 These are schematic diagrams of the structure of photovoltaic modules provided in some embodiments of this application;

[0021] Figure 5 This is a schematic diagram of the mating structure of the laminate and the sealing tape in a photovoltaic module provided in some embodiments of this application;

[0022] Figure 6 This is a schematic diagram of the structure of the edge sealing tape in a photovoltaic module provided in some embodiments of this application;

[0023] Figure 7 This is a schematic diagram of the adhesive layer of the edge sealing tape in a photovoltaic module provided in some embodiments of this application;

[0024] Figure 8 This is a schematic diagram of the adhesive layer of the edge sealing tape in a photovoltaic module provided in other embodiments of this application;

[0025] Figure 9 This is a schematic cross-sectional view of a photovoltaic module provided in some embodiments of this application;

[0026] Figure 10 This is a cross-sectional structural diagram of a photovoltaic module provided in other embodiments of this application. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the various embodiments of this application will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been presented in the various embodiments of this application to enable readers to better understand this application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in this application can be implemented. The division of the various embodiments below is for the convenience of description and should not constitute any limitation on the specific implementation of this application. The various embodiments can be combined with and referenced by each other without contradiction.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0029] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0030] As the application of photovoltaic (PV) modules becomes increasingly widespread, the requirements for their reliability are also constantly rising. During the encapsulation process, edge-sealing tape and frames are applied to the edges of the laminated components, forming a protective structure at the module's edges. The laminated components are formed by laminating adhesive films and cover plates onto both sides of a cell string, and the cell string is formed by connecting multiple cells in series using solder ribbons. Currently, the edge-sealing tapes used in PV modules mainly include water-blocking tape and insulating tape. Both types of tape are applied to the edges of the laminated components to prevent moisture penetration.

[0031] In the manufacturing process of photovoltaic modules, double-sided glass, adhesive film, and solar cells are first laminated to form a laminate. This laminate is then glued, framed, and finally cured to form a complete module. For example... Figure 1 As shown, the edge of the laminate 100 is accommodated in a receiving groove of the frame 200, and the receiving groove of the frame 200 is filled with an adhesive 210, such as silicone, which bonds the laminate 100 to the frame 200. In some cases, such as Figure 2 As shown, edge sealing tape 300 is applied to the edge of the laminate 100 to improve protective performance. Existing edge sealing tapes generally consist of three layers: an aluminum foil water-blocking layer, an insulating layer, and an adhesive layer. The adhesive layer typically uses acrylic resin. Because photovoltaic modules are used outdoors for extended periods, the adhesive layer has a high moisture permeability. Although the aluminum foil layer blocks surface moisture intrusion, it cannot prevent moisture from penetrating the photovoltaic module's internal cells and encapsulant layer, leading to corrosion and affecting the module's reliability. Figure 3 As shown, the laminate 100 includes an inner intermediate layer 110 and cover plates 120 covering both sides of the intermediate layer 110. The intermediate layer 110 includes solar cells and an adhesive film covering the cells. Moisture can penetrate the laminate 100 along the path indicated by the dashed arrow, causing corrosion. In actual testing, photovoltaic modules sealed with edge-sealing tape and those without conventional edge-sealing tape showed consistent internal moisture erosion after routine damp heat testing, with no significant improvement. Disassembly analysis of the photovoltaic modules revealed a significant increase in moisture content in the adhesive layer, indicating that moisture penetrates the photovoltaic module through the adhesive layer, and the edge-sealing tape's moisture-blocking effect is ineffective.

[0032] To ensure the reliability of photovoltaic modules, some embodiments of this application provide a photovoltaic module that optimizes the structure of existing encapsulation tapes. The portion of the adhesive layer bonded to the front and back of the laminate uses a water-blocking material with low water permeability, thereby improving the water-blocking capability of the encapsulation tape on the front and back of the photovoltaic module and significantly enhancing the encapsulation reliability of the photovoltaic module. In practice, high water-blocking adhesives, such as butyl rubber, can be used for the adhesive layer material to replace conventional adhesives with higher water permeability, such as acrylates, improving the water vapor barrier capability of the sealing tape at both edges and thus enhancing the reliability of the encapsulated photovoltaic module.

[0033] The following is combined Figures 4 to 10 This application describes the structure of photovoltaic modules provided in some embodiments.

[0034] like Figures 4 to 10As shown, some embodiments of this application provide a photovoltaic module including a laminate 11, an edge-sealing tape 12, and a frame 13. The laminate 11 includes a first surface 101 and a second surface 102 disposed opposite to each other. The edge-sealing tape 12 is sequentially provided with a substrate layer 121, an insulating layer 122, and an adhesive layer 123. The adhesive layer 123 includes a first adhesive portion 1231 and a second adhesive portion 1232 disposed at intervals, and a third adhesive portion 1233 located between the first adhesive portion 1231 and the second adhesive portion 1232. The first adhesive portion 1231 is attached to the first surface 101, the second adhesive portion 1232 is attached to the second surface 102, and the third adhesive portion 1233 is attached to the side of the laminate 11. The water permeability of the first adhesive portion 1231 and the water permeability of the second adhesive portion 1232 are less than or equal to 1 g / m³. 2 The frame 13 is provided with a receiving groove, and the edge of the laminate 11 and the sealing tape 12 are located in the receiving groove.

[0035] The laminate 11 is formed by laminating battery strings and encapsulation materials. The battery string includes multiple battery cells connected in series, and the encapsulation material includes an adhesive film and a cover plate. The adhesive film can bond the cover plate to both sides of the battery string. The cover plate can protect the battery string and can also be made of a light-transmitting material to allow light to pass through and reach the battery cells. The first surface 101 and the second surface 102 are the two larger surfaces of the laminate 11. One of the first surface 101 and the second surface 102 is the front surface, and the other is the back surface. The front surface of the laminate 11 is the light-receiving surface, and the back surface is the back surface. Generally, the back surface has a weaker ability to receive light than the light-receiving surface. In this embodiment, the first surface 101 is the light-receiving surface, and the second surface 102 is the back surface.

[0036] The edge sealing tape 12 is adhered to the edges of the laminate 11. The edge sealing process of the edge sealing tape 12 is a crucial sealing step after lamination in photovoltaic module manufacturing. Applying the edge sealing tape 12 to the four edges of the laminate 11 primarily seals the gaps between the edges of the laminate 11 and the frame 13, preventing moisture, dust, and other contaminants from entering the photovoltaic module, thereby protecting the cells and internal circuitry and ensuring the long-term reliability and lifespan of the photovoltaic module. The substrate layer 121 forms the basis for the edge sealing tape 12. The insulating layer 122 and the adhesive layer 123 can be sequentially formed on the substrate layer 121. The substrate layer 121 can be formed using aluminum foil to achieve waterproofing and ensure flexibility. The insulating layer 122 provides insulation, preventing electrical connection between the laminate 11 and the frame 13, thus preventing short circuits. The adhesive layer 123 is the part where the edge sealing tape 12 adheres to the laminate 11; the edge sealing tape 12 is bonded to the surface of the laminate 11 through the adhesive effect of the adhesive layer 123.

[0037] The adhesive layer 123 includes a first adhesive portion 1231 and a second adhesive portion 1232 spaced apart. The first adhesive portion 1231 and the second adhesive portion 1232 are respectively adhered to the two larger surfaces of the laminate 11, namely the front and back surfaces of the laminate 11. A third adhesive portion 1233 is located between the first adhesive portion 1231 and the second adhesive portion 1232, and is adhered to the side surface of the laminate 11, which is the surface at the edge of the laminate 11 connecting the front and back surfaces. The first adhesive portion 1231 and the second adhesive portion 1232 are made of adhesive materials with low water permeability, which can effectively prevent moisture and other substances from entering the front and back surfaces of the laminate 11. The third adhesive portion 1233 is located in the middle of the sealing tape 12 and can be made of conventional adhesive materials or materials with a water permeability close to or the same as that of the first adhesive portion 1231. Wherein, water permeability represents the amount of water vapor that passes through a unit area of ​​material per unit time, with the unit time being 24 hours. That is, the water permeability of the first adhesive part 1231 and the water permeability of the second adhesive part 1232 are less than or equal to 1 g / m². 2 Indicates 1m 2 The amount of water vapor that permeates through the first adhesive portion 1231 and the second adhesive portion 1232 of the same size is less than or equal to 1g within 24 hours, while the water permeability of conventional acrylic adhesives is 60g / m². 2 Up to 70g / m 2 .

[0038] The frame 13 is located at the edge of the laminate 11. The frame 13 has a receiving groove to accommodate the edge of the laminate 11, and it can be bonded using an adhesive 131 such as silicone to form a stable connection between the laminate 11 and the frame 13. The photovoltaic module can be mounted on a bracket or other support using the frame 13. The frame 13 completely encapsulates the four edges of the laminate 11. The frame 13 can be made of aluminum alloy to achieve a lightweight photovoltaic module.

[0039] In some embodiments of this application, photovoltaic modules are provided with edge sealing tape 12 and a frame 13 at the edges of the laminate 11. The edge sealing tape 12 wraps around the edges of the laminate 11, and the receiving groove of the frame 13 accommodates the edges of the laminate 11 and the edge sealing tape 12. The adhesive layer 123 of the edge sealing tape 12 includes multiple parts, which are respectively adhered to different surfaces of the laminate 11. The water permeability of the first adhesive portion 1231 and the second adhesive portion 1232 near the edge of the adhesive layer 123 is less than or equal to 1 g / m². 2 This ensures that the adhesive layer 123, which is attached to the front and back of the laminate 11, can effectively block the intrusion of moisture and corrosive substances, thereby ensuring the reliability of the photovoltaic module formed after the sealing tape 12 and the frame 13 are sealed.

[0040] In some embodiments, the permeability of the third adhesive portion 1233 may be greater than or equal to the permeability of the first adhesive portion 1231.

[0041] In other words, the third adhesive portion 1233 can be made of an adhesive material with a higher or the same water permeability as the first adhesive portion 1231. The third adhesive portion 1233 is located between the first adhesive portion 1231 and the second adhesive portion 1232, and is adhered to the side of the laminate 11. The first adhesive portion 1231 and the second adhesive portion 1232, located near the edge of the sealing tape 12, are the main sources of moisture intrusion into the photovoltaic module from the edge of the sealing tape 12 in a direction parallel to the front and back of the laminate 11. By making the water permeability of the third adhesive portion 1233 greater than that of the first adhesive portion 1231, the third adhesive portion 1233 can be made of conventional adhesive materials such as acrylic resins, thereby saving on the cost of the adhesive layer 123 of the sealing tape 12. By making the water permeability of the third adhesive portion 1233 equal to that of the first adhesive portion 1231, the third adhesive portion 1233 can be made using the same adhesive material as the first adhesive portion 1231, simplifying the manufacturing process of the adhesive layer 123 of the edge sealing tape 12.

[0042] In practice, the permeability of adhesive layer 123 can be reduced to 0.1 g / m. 2 Up to 0.5g / m 2 .

[0043] Different parts of the adhesive layer 123 have a consistent water permeability, and all parts of the adhesive layer 123 can be molded using the same adhesive material. This is achieved by controlling the water permeability of the adhesive layer 123 to 0.1 g / m³. 2 Up to 0.5g / m 2 Within a certain range, it can effectively block the intrusion of external moisture and control the material cost of the adhesive layer 123. For example, the water permeability of the adhesive layer 123 can be 0.1 g / m³. 2 0.2g / m 2 0.3g / m 2 0.4g / m 2 Or 0.5g / m 2 The adhesive layer 123 can be made of high water-resistant adhesive materials such as butyl rubber or modified butyl rubber, which can achieve low water vapor permeability while still providing adhesive function.

[0044] In some embodiments, the adhesive layer 123 is provided with a non-adhesive portion 1234, the first adhesive portion 1231 and / or the second adhesive portion 1232 are provided with a hollow area, the non-adhesive portion 1234 fills the hollow area, and the water permeability of the non-adhesive portion 1234 is less than the water permeability of the first adhesive portion 1231 and the second adhesive portion 1232.

[0045] The non-adhesive portion 1234 is made of a non-adhesive material and fills the hollow area provided by the first adhesive portion 1231 or the second adhesive portion 1232. The non-adhesive portion 1234 may not serve an adhesive function, but only a moisture barrier function. By laminating a non-adhesive material into the adhesive layer 123, the low water permeability of the non-adhesive material, such as aluminum foil, can be used to effectively improve the barrier properties of the adhesive layer 123. While utilizing the adhesive portion for both adhesive and barrier functions, the non-adhesive portion 1234 also serves a barrier function.

[0046] In practice, a non-adhesive portion 1234 with the same water permeability as the first adhesive portion 1231 can be used to fill the hollow area of ​​the first adhesive portion 1231 or the second adhesive portion 1232. The non-adhesive portion 1234 protrudes from the adhesive portion on the adhesive surface of the adhesive layer 123. When the sealing tape 12 is applied, the sealing tape 12 can be pressed tightly to firmly fix the adhesive portion to different surfaces of the laminate 11, and to compress the non-adhesive portion 1234 to a certain extent, ensuring that the non-adhesive portion 1234 can be tightly adhered to the surface of the laminate 11 without forming an adhesive with the surface of the laminate 11.

[0047] In addition, the non-adhesive portion 1234 may be provided to extend in a direction that intersects the width direction of the first adhesive portion 1231.

[0048] The non-adhesive portion 1234 can be configured as a regular strip or line, and the strip or line non-adhesive layers 123 can intersect each other. The non-adhesive portion 1234 can also be configured as an irregular shape. The non-adhesive portion 1234 can be arranged in a regular island pattern on the adhesive layer 123, or it can be arranged randomly on the adhesive layer 123. By extending the non-adhesive portion 1234 in a direction that intersects the width direction of the first adhesive portion 1231, the non-adhesive portion 1234 can block the intrusion path of moisture. When moisture intrudes from the edge of the sealing tape 12 towards the edge of the laminate 11 along the width direction of the sealing tape 12, it can prevent the moisture from continuing to pass through and reaching the side of the laminate 11, thereby preventing moisture from entering the inner layer structure of the laminate 11.

[0049] In practice, the non-adhesive portion 1234 can be provided in a direction consistent with the edge extension direction of the sealing tape 12, or it can be provided in a direction that forms a non-90° angle with the edge extension direction of the sealing tape 12.

[0050] In some embodiments, such as Figure 8 As shown, there can be multiple non-adhesive portions 1234, and the multiple non-adhesive portions 1234 are arranged at intervals.

[0051] Multiple non-adhesive portions 1234 can act as moisture barriers at multiple different locations, forming multiple protective structures along the paths where moisture may enter. In addition, the dispersed arrangement of the non-adhesive portions 1234 has little impact on the formation of a good adhesion between the adhesive layer 123 and the surface of the laminate 11. The adhesive portions located on one side of the non-adhesive portions 1234 and the adhesive portions located between two adjacent non-adhesive portions 1234 can perform their adhesive function normally.

[0052] In some embodiments, the photovoltaic module may further include a sealing portion 14, which is disposed at the edge of the first adhesive portion 1231 away from the edge of the third adhesive portion 1233 and / or at the edge of the second adhesive portion 1232 away from the edge of the third adhesive portion 1233.

[0053] The sealing portion 14 is located at the sealing edge of the sealing tape 12 and can abut against the edge of the sealing tape 12. The sealing portion 14 can act as an insulator on the side of the sealing tape 12, forming protection at the sealing edge of the sealing tape 12. The sealing portion 14 can seal the edge of the sealing bag, and the sealing portion 14 can be made of sealant or other materials with sealing properties. Figure 9 A schematic diagram of the cross-sectional structure of a photovoltaic module without a sealing part 14 at the edge of the sealing tape 12 is provided. Figure 10 A schematic diagram of the cross-sectional structure of a photovoltaic module with a sealing part 14 at the edge of the sealing tape 12 is provided.

[0054] In addition, the sealing part 14 in the first direction ( Figure 10 The thickness in the direction indicated by the middle arrow A can be greater than the thickness of the adhesive layer 123 in the first direction, which is parallel to the thickness direction of the laminate 11.

[0055] In other words, the sealing portion 14 is higher than the adhesive layer 123 of the sealing tape 12 at the edge of the sealing tape 12. By making the thickness of the sealing portion 14 in the first direction greater than the thickness of the adhesive layer 123 in the first direction, the sealing portion 14 can completely cover the side of the adhesive layer 123, thus achieving a better sealing effect on the adhesive layer 123. In practice, the sealing portion 14 is at the same height as the adhesive layer 123 of the sealing tape 12 at the edge of the sealing tape 12. Furthermore, the sealing portion 14 can have the same height as the sealing tape 12 in the first direction, or it can protrude from the outer surface of the sealing tape 12 in the first direction, that is, from the surface of the substrate layer 121 away from the insulating layer 122.

[0056] In some embodiments, the width W of the first adhesive portion 1231 and the second adhesive portion 1232 may be greater than or equal to 5 mm and less than or equal to 10 mm.

[0057] The first adhesive portion 1231 and the second adhesive portion 1232 cover the front and back surfaces of the laminate 11. By controlling the coverage width of the first adhesive portion 1231 and the second adhesive portion 1232 on the laminate 11, the creepage design requirements can be met while avoiding adverse light-blocking effects on the laminate 11. The width of the first adhesive portion 1231 and the second adhesive portion 1232 refers to their dimensions in the width direction of the sealing tape 12. In practice, the width W of the first adhesive portion 1231 and the second adhesive portion 1232 can be 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, or 10 mm.

[0058] like Figure 4 As shown, the sealing tape 12 can be positioned within the edge of the frame 13 in the thickness direction of the laminate 11.

[0059] In other words, after the edge sealing tape 12 is encapsulated by the frame 13, the edge of the edge sealing tape 12 is covered by the frame 13. The frame 13 can completely accommodate the edge sealing tape 12 within the receiving groove. By ensuring that the edge of the edge sealing tape 12 is not exposed on the edge of the frame 13, the aesthetics of the photovoltaic module can be ensured, and the frame 13 can be used to encapsulate the edge sealing tape 12 to form protection.

[0060] Those skilled in the art will understand that the above embodiments are specific implementations of this application, and in practical applications, various changes can be made in form and detail without departing from the spirit and scope of this application.

Claims

1. A photovoltaic module, characterized in that, include: A laminate, comprising a first surface and a second surface disposed opposite to each other; The sealing tape comprises a substrate layer, an insulating layer, and an adhesive layer in sequence. The adhesive layer includes a first adhesive portion and a second adhesive portion spaced apart, and a third adhesive portion located between the first and second adhesive portions. The first adhesive portion is adhered to a first surface, the second adhesive portion is adhered to a second surface, and the third adhesive portion is adhered to the side surface of the laminate. The water permeability of the first adhesive portion and the water permeability of the second adhesive portion are less than or equal to 1 g / m³. 2 ; The frame is provided with a receiving groove, and the edge of the laminate and the sealing tape are located in the receiving groove.

2. The photovoltaic module according to claim 1, characterized in that, The water permeability of the third adhesive portion is greater than or equal to the water permeability of the first adhesive portion.

3. The photovoltaic module according to claim 1 or 2, characterized in that, The water permeability of the adhesive layer is 0.1 g / m 2 Up to 0.5g / m 2 .

4. The photovoltaic module according to claim 1, characterized in that, The adhesive layer is provided with a non-adhesive portion, and the first adhesive portion and / or the second adhesive portion are provided with a hollow area. The non-adhesive portion fills the hollow area, and the water permeability of the non-adhesive portion is less than that of the first adhesive portion and the second adhesive portion.

5. The photovoltaic module according to claim 4, characterized in that, The non-adhesive portion extends along a direction that intersects the width direction of the first adhesive portion.

6. The photovoltaic module according to claim 4, characterized in that, There are multiple non-adhesive portions, and the multiple non-adhesive portions are arranged at intervals between each other.

7. The photovoltaic module according to claim 1, characterized in that, It also includes a sealing portion, which is disposed at the edge of the first adhesive portion away from the third adhesive portion and / or at the edge of the second adhesive portion away from the third adhesive portion.

8. The photovoltaic module according to claim 7, characterized in that, The thickness of the sealing portion in the first direction is greater than the thickness of the adhesive layer in the first direction, and the first direction is parallel to the thickness direction of the laminate.

9. The photovoltaic module according to claim 1, characterized in that, The widths of the first adhesive portion and the second adhesive portion are greater than or equal to 5 mm and less than or equal to 10 mm.

10. The photovoltaic module according to claim 1, characterized in that, The sealing tape is located inside the edge of the frame in the thickness direction of the laminate.

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