Photovoltaic module and photovoltaic system

Abstract

The application relates to the technical field of photovoltaic modules, and provides a photovoltaic module and a photovoltaic system. The photovoltaic module comprises a photovoltaic body, the photovoltaic body comprises a front plate and a back plate which are arranged in a laminated mode, and a thin-film cell piece which is arranged between the front plate and the back plate and is arranged on the front plate; a sealing groove is arranged between the front plate and the back plate and surrounds the thin-film cell piece; a sealing strip is arranged in the sealing groove; the sealing strip, the front plate and the back plate form a sealing cavity; and a metal water-blocking belt is arranged in the sealing cavity and covers the thin-film cell piece. The sealing strip is arranged in the sealing groove between the front plate and the back plate, and the metal water-blocking belt is arranged in the sealing cavity formed by the sealing strip, the front plate and the back plate, so that the situation that water vapor directly invades into the photovoltaic module due to the delamination caused by the poor sealing between the sealing strip and the front plate and the back plate can be effectively avoided. The sealing effect and the water-blocking property of the thin-film cell piece are improved, and the quality of the photovoltaic module is improved.

Description

Technical Field

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

[0002] As the core component for converting solar energy into electrical energy, the weather resistance of photovoltaic modules is a key factor affecting the operational stability of photovoltaic systems.

[0003] In related technologies, photovoltaic modules include a front panel, a back panel, and solar cells, as well as a sealant placed between the front and back panels, and are encapsulated using a lamination process. This design makes it easy for moisture to penetrate the interior of the photovoltaic module, which is detrimental to improving its water resistance and overall quality. Utility Model Content

[0004] In view of this, this application aims to provide a photovoltaic module that can help improve the quality of photovoltaic modules.

[0005] To achieve the above objectives, the technical solution of this application is implemented as follows: A photovoltaic module includes a photovoltaic body, the photovoltaic body including a front panel and a back panel stacked together, and a thin-film battery cell sandwiched between the front panel and the back panel, the thin-film battery cell being disposed on the front panel; A sealing groove is provided between the front plate and the back plate, surrounding the thin-film battery cell; A sealing strip is provided in the sealing groove. The sealing strip, the front plate, and the back plate form a sealing cavity. A metal water-blocking strip covering the thin-film battery cell is provided in the sealing cavity.

[0006] Furthermore, at least one side of the metal water-blocking strip is provided with a flange; the flange extends along the plane where the thin-film battery cell is located and is sandwiched between the back plate and the sealing strip, or sandwiched between the back plate and the thin-film battery cell; and / or, the flange extends outward along the plane where the thin-film battery cell is located and is sandwiched between the front plate and the sealing strip.

[0007] Furthermore, the metal water-blocking strip is wrapped around the thin-film battery cell circumferentially; both sides of the metal water-blocking strip are provided with flanges; one flange extends outward along the plane of the thin-film battery cell and is sandwiched between the front plate and the sealing strip; the other flange extends outward along the plane of the thin-film battery cell and is sandwiched between the back plate and the sealing strip.

[0008] Furthermore, the metal water-blocking strip is wrapped around the thin-film battery cell circumferentially; both sides of the metal water-blocking strip are provided with flanges; one flange extends outward along the plane of the thin-film battery cell and is sandwiched between the front plate and the sealing strip; the other flange extends inward along the plane of the thin-film battery cell and is sandwiched between the back plate and the thin-film battery cell.

[0009] Furthermore, the metal water-blocking tape wraps around the thin-film battery cell circumferentially; the metal water-blocking tape extends outward along the plane of the thin-film battery cell and is sandwiched between the front plate and the sealing strip to form the flange; a metal water-blocking layer is provided between the thin-film battery cell and the back plate, and the metal water-blocking layer is sealed to the metal water-blocking tape.

[0010] Furthermore, the metal water-blocking layer is laid on the metal water-blocking strip; and / or, the metal water-blocking layer and the metal water-blocking strip are integrally formed.

[0011] Furthermore, the width W of the flange satisfies 0.1mm≤W≤3mm.

[0012] Furthermore, the metal water-blocking tape includes an aluminum-containing adhesive tape; the aluminum-containing adhesive tape is coated with an adhesive layer on at least one side corresponding to the thin-film battery cell.

[0013] Furthermore, the thin-film battery cell is covered with an encapsulating film layer; the metal water-blocking tape is wrapped around the encapsulating film layer.

[0014] Compared with related technologies, this application has the following advantages: (1) The photovoltaic module described in this application, by setting a sealing strip in the sealing groove between the front panel and the back panel, and setting a metal water-blocking strip in the sealing cavity formed by the sealing strip, the front panel and the back panel, can effectively avoid delamination caused by poor sealing between the sealing strip and the front panel and the back panel, which would allow water vapor to directly invade the photovoltaic module. This is beneficial to improving the sealing effect and water resistance of the thin-film solar cells, and thus to improving the quality of the photovoltaic module.

[0015] (2) By setting a flange and clamping the flange between the back plate and the thin film battery, the connection between the metal water-blocking strip and the back plate can be effectively improved, thereby effectively improving the sealing between the metal water-blocking strip and the back plate.

[0016] Meanwhile, when both sides of the metal water-blocking strip are provided with flanges, the connection between the metal water-blocking strip and the front and back panels can be effectively improved, which helps to improve the water resistance of the photovoltaic module and thus improve the quality of the photovoltaic module.

[0017] (3) By setting flanges on both sides of the metal water-blocking strip, the contact area between the metal water-blocking strip and the front and back panels can be effectively increased, thereby effectively increasing the water-blocking area of ​​the metal water-blocking strip and thus helping to improve the water resistance of the photovoltaic module.

[0018] (4) By setting one of the flanges to extend inward along the plane of the thin film cell and sandwich it between the back sheet and the thin film cell, it can increase the contact area between the metal water-blocking strip and the back sheet, and effectively ensure the bonding area between the sealing strip and the back sheet, thereby helping to improve the water resistance and quality of the photovoltaic module.

[0019] (5) By setting a metal water-blocking layer and sealing the metal water-blocking layer on the metal water-blocking strip, the thin-film battery cells can be covered. In conjunction with the flange sandwiched between the front plate and the sealing strip, the sealing and water-blocking properties of the photovoltaic module can be effectively improved, which is conducive to improving the quality of the photovoltaic module.

[0020] (6) By setting a metal water-blocking layer to overlap the metal water-blocking strip, the contact area between the two can be effectively increased, thereby improving the sealing between the two and improving the water resistance. By making the metal water-blocking layer and the metal water-blocking strip integrally molded, the water resistance can be effectively guaranteed, and the assembly process can be effectively reduced compared to setting the two separately.

[0021] (7) By setting the flange width W to meet 0.1mm≤W≤3mm, the water resistance of the photovoltaic module can be improved by setting the flange, while also effectively ensuring the bonding area between the sealing strip and the front and back panels, thereby effectively ensuring the structural stability of the photovoltaic module.

[0022] (8) By setting a metal water-blocking strip, including an aluminum-containing tape, the metal water-blocking strip not only has good water-blocking properties, but also helps control production costs and facilitates design and implementation. Furthermore, by ensuring that the aluminum-containing tape has an adhesive layer on at least one side, the reliability of the aluminum-containing tape installation can be effectively guaranteed.

[0023] (9) By setting an encapsulating film layer and covering the metal water-blocking tape with the encapsulating film layer, the reliability of the metal water-blocking tape setting can be improved, which in turn helps to improve the water resistance of the photovoltaic module, thereby improving the quality of the photovoltaic module.

[0024] This application also proposes a photovoltaic system, which is equipped with photovoltaic modules as described above.

[0025] The photovoltaic system described in this application, by incorporating the photovoltaic modules as described above, can effectively improve the water resistance of the photovoltaic modules, thereby enhancing the durability of the photovoltaic system. Attached Figure Description

[0026] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a cross-sectional schematic diagram showing that both flanges of the photovoltaic module described in the embodiment of this application extend outwards; Figure 2 for Figure 1 A magnified view of part A in the middle; Figure 3 This is a cross-sectional schematic diagram showing the two flanges of the photovoltaic module described in the embodiment of this application extending in different directions; Figure 4 This is a magnified view of part B. Figure 5 This is a cross-sectional schematic diagram showing the photovoltaic module described in the embodiments of this application having a metal water-blocking strip and a metal water-blocking layer; Figure 6 for Figure 5 A magnified view of part C in the middle; Figure 7 This is a cross-sectional view of the metal water-blocking strip described in the embodiments of this application.

[0027] Explanation of reference numerals in the attached figures: 1. Photovoltaic body; 101. Front panel; 102. Back panel; 103. Thin-film solar cell; 1a. Sealing groove; 1b. Sealing cavity; 2. Sealing strip; 3. Metal water-blocking tape; 301. Flanged edge; 3a. Aluminum-containing tape; 3b. Adhesive layer; 4. Metal water-blocking layer; 5. Encapsulation film layer. Detailed Implementation

[0028] To make the technical solution and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0030] Furthermore, it should be noted that in the description of this application, if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, these are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] Furthermore, in the description of this application, unless otherwise expressly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application in light of the specific circumstances.

[0032] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0034] The embodiments of the first aspect of this application provide a photovoltaic module that can convert solar energy into electrical energy. Furthermore, through its innovative design, the photovoltaic module of this application can also improve the overall water resistance of the photovoltaic module by increasing its sealing performance, thereby improving the quality of the photovoltaic module.

[0035] In related technologies, photovoltaic modules include a front panel 101, a back panel 102, and solar cells, as well as a sealant arranged circumferentially along the front panel 101 and the back panel 102. The solar cells are encapsulated in the space formed by the front panel 101, the back panel 102, and the sealant by a lamination encapsulation process. Due to the adhesion between the sealant and the front panel 101 and the back panel 102, moisture can easily penetrate into the interior of the photovoltaic module during use, which is not conducive to improving the water resistance of the photovoltaic module and thus not conducive to improving the quality of the photovoltaic module.

[0036] In view of this, in order to overcome the shortcomings of related technologies, the photovoltaic module of this embodiment combines... Figures 1 to 6 As shown, the overall design includes a photovoltaic body 1, which includes a front panel 101 and a back panel 102 stacked together, and a thin-film solar cell 103 sandwiched between the front panel 101 and the back panel 102. The thin-film solar cell 103 is disposed on the front panel 101. A sealing groove 1a is provided between the front panel 101 and the back panel 102, surrounding the thin-film solar cell 103.

[0037] The sealing groove 1a is provided with a sealing strip 2. The sealing strip 2, the front plate 101 and the back plate 102 form a sealing cavity 1b. The sealing cavity 1b is provided with a metal water-blocking strip 3 covering the thin film battery cell 103.

[0038] Therefore, by setting a sealing strip 2 in the sealing groove 1a between the front panel 101 and the back panel 102, and setting a metal water-blocking strip 3 in the sealing cavity 1b formed by the sealing strip 2, the front panel 101, and the back panel 102, this arrangement can effectively prevent delamination caused by poor sealing between the sealing strip 2 and the front panel 101 and the back panel 102, thus avoiding the direct intrusion of moisture into the photovoltaic module. This is beneficial to improving the sealing effect and water resistance of the thin-film solar cell 103, thereby improving the quality of the photovoltaic module.

[0039] Based on the above overview, it can be understood that by setting the metal water-blocking strip 3 and the sealing strip 2, double-layer protection can be achieved for the thin-film solar cell 103, effectively improving the water resistance of the photovoltaic module. Furthermore, by placing the metal water-blocking strip 3 inside the sealing cavity 1b, compared to placing it outside the sealing strip 2, the situation where adhesive from the sealing strip 2 overflows into the sealing groove 1a during the lamination of the photovoltaic module, thus compromising the sealing performance of the metal water-blocking layer 4, can be effectively avoided.

[0040] It is worth noting that, as a specific arrangement of the sealing strip 2, this embodiment uses a silicone rubber strip. Compared to using a butyl rubber strip, this arrangement ensures that the sealing strip 2 is firmly bonded to the glass front panel 101 and back panel 102, effectively protecting the structural strength of the photovoltaic module and preventing delamination due to weak adhesion. Furthermore, using a silicone rubber strip in conjunction with the metal water-blocking layer 4 effectively protects both the structural strength and water-blocking seal of the photovoltaic module. Of course, it is understood that in this embodiment, the sealing strip 2 could also be made of butyl rubber or other adhesive strips, as long as a sealing fixation between the front panel 101 and back panel 102 is achieved.

[0041] In some exemplary embodiments, at least one side of the metal water-blocking strip 3 is provided with a flange 301; the flange 301 extends along the plane where the thin-film battery cell 103 is located and is sandwiched between the back plate 102 and the sealing strip 2, or between the back plate 102 and the thin-film battery cell 103.

[0042] It is understandable that, as described above, when the metal water-blocking strip 3 has a flange 301 on one side, and the flange 301 is located near the back plate 102, the flange 301 can extend outward along the plane where the thin-film battery cell 103 is located and be sandwiched between the sealing strip 2 and the back plate 102. Alternatively, it can extend inward along the plane where the thin-film battery cell 103 is located and be sandwiched between the thin-film battery cell 103 and the back plate 102.

[0043] It is worth noting that when both sides of the metal water-blocking strip 3 are provided with flanges 301, the flange 301 on the side closer to the front plate 101 extends outward along the plane where the thin-film battery cell 103 is located and is sandwiched between the front plate 101 and the sealing strip 2.

[0044] Therefore, by setting the flange 301 and clamping the flange 301 between the back plate 102 and the thin-film battery cell 103, the connection tightness between the metal water-blocking strip 3 and the back plate 102 can be effectively improved, thereby effectively improving the sealing performance between the metal water-blocking strip 3 and the back plate 102.

[0045] Meanwhile, when both sides of the metal water-blocking strip 3 are provided with flanges 301, the connection between the metal water-blocking strip 3 and the front panel 101 and the back panel 102 can be effectively improved, which helps to improve the water resistance of the photovoltaic module and thus improve the quality of the photovoltaic module.

[0046] In some exemplary embodiments, a metal water-blocking strip 3 is circumferentially wrapped around the thin-film battery cell 103; both sides of the metal water-blocking strip 3 are provided with flanges 301. One flange 301 extends outward along the plane of the thin-film battery cell 103 and is sandwiched between the front plate 101 and the sealing strip 2; the other flange 301 extends outward along the plane of the thin-film battery cell 103 and is sandwiched between the back plate 102 and the sealing strip 2.

[0047] Therefore, by setting flanges 301 on both sides of the metal water-blocking strip 3, the contact area between the metal water-blocking strip 3 and the front panel 101 and the back panel 102 can be effectively increased, thereby effectively increasing the water-blocking area of ​​the metal water-blocking strip 3 and thus helping to improve the water resistance of the photovoltaic module.

[0048] It is worth noting that by making both flanges 301 extend outward, when setting the metal water-blocking strip 3, it is easy to stick the metal water-blocking strip 3 between the laminated front panel 101 and back panel 102, which can effectively ensure that the metal water-blocking strip 3 is laid flat and without air bubbles.

[0049] The specific steps are as follows: A front panel 101 containing thin-film solar cells 103, an encapsulating film (e.g., POE, EVA), and a back panel 102 are stacked sequentially. A modular, ring-shaped fixture is placed between the front panel 101 and the back panel 103. After high-temperature lamination, the thin-film solar cells 103 are encapsulated by the encapsulating film, and the front panel 101 and the back panel 103 are simultaneously bonded together by the encapsulating film. After the laminate cools down, the fixture is removed from the laminate, and the fixture's position forms a pre-defined area for setting the sealing strip 2. Then, a metal water-blocking strip 3 is inserted into the gap between the front panel 101 and the back panel 103. At this time, the metal water-blocking strip 3 naturally forms two flanges 301 extending outwards. After completion, butyl adhesive or silicone is applied to the outside of the metal water-blocking strip 3. After the butyl adhesive or silicone cures, the sealing strip 2 is formed, thus forming a photovoltaic module.

[0050] In some exemplary embodiments, a metal water-blocking strip 3 is circumferentially wrapped around the thin-film battery cell 103; both sides of the metal water-blocking strip 3 are provided with flanges 301. One flange 301 extends outward along the plane of the thin-film battery cell 103 and is sandwiched between the front plate 101 and the sealing strip 2; the other flange 301 extends inward along the plane of the thin-film battery cell 103 and is sandwiched between the back plate 102 and the thin-film battery cell 103.

[0051] Therefore, by setting one of the flanges 301 to extend inward along the plane of the thin-film solar cell 103 and sandwich it between the back plate 102 and the thin-film solar cell 103, the contact area between the metal water-blocking strip 3 and the back plate 102 can be increased, while also preventing the flange 301 from occupying the bonding area between the sealing strip 2 and the back plate 102. This effectively protects the bonding area between the sealing strip 2 and the back plate 102, thereby helping to improve the water resistance and quality of the photovoltaic module.

[0052] It is worth noting that, as an optional implementation of the metal water-blocking strip 3, the flange 301 on the side near the back plate 102 is sandwiched between the back plate 102 and the thin-film battery cell 103. In this embodiment, the side of the metal water-blocking strip 3 near the front plate 101 is first placed on the front plate 101, then the other side of the metal water-blocking strip 3 is attached to the thin-film battery cell 103, and finally the back plate 102 is covered. After lamination, the metal water-blocking strip 3 is placed between the front plate 101 and the back plate 102.

[0053] In some exemplary embodiments, a metal water-blocking strip 3 is circumferentially wrapped around the thin-film battery cell 103; the metal water-blocking strip 3 extends outward along the plane of the thin-film battery cell 103 and is sandwiched between the front panel 101 and the sealing strip 2 to form a flange 301. A metal water-blocking layer 4 is provided between the thin-film battery cell 103 and the back panel 102, and the metal water-blocking layer 4 is sealed to the metal water-blocking strip 3.

[0054] Therefore, by setting the metal water-blocking layer 4 and sealing the metal water-blocking layer 4 onto the metal water-blocking strip 3, the thin-film solar cell 103 can be covered. In conjunction with the flange 301 sandwiched between the front panel 101 and the sealing strip 2, the sealing and water-blocking properties of the photovoltaic module can be effectively improved, thereby improving the quality of the photovoltaic module.

[0055] In some exemplary embodiments, the metal water-blocking layer 4 is laid on the metal water-blocking strip 3. By laying the metal water-blocking layer 4 on top of the metal water-blocking strip 3, the contact area between the two can be effectively increased, thereby effectively improving the sealing between them and enhancing the water resistance.

[0056] Based on the above description, when a metal water-blocking layer 4 is provided and placed on a metal water-blocking strip 3, in specific implementation, the metal water-blocking strip 3 can be first placed around the thin-film battery cell 103, then the metal water-blocking layer 4 can be applied to the side of the thin-film battery cell 103 near the backplate 102, with the metal water-blocking layer 4 placed on the metal water-blocking strip 3. Finally, the backplate 102 is placed and laminated to complete the setting of the metal water-blocking strip 3 and the metal water-blocking layer 4. Of course, setting the metal water-blocking layer 4 first, then setting the metal water-blocking strip 3 and placing the metal water-blocking strip 3 on the metal water-blocking layer 4, and finally placing the backplate 102 and laminating will also complete the setting of the metal water-blocking strip 3 and the metal water-blocking layer 4.

[0057] In some exemplary embodiments, to increase bonding strength, an encapsulating film, such as POE or EVA, may be added between the metal water-blocking strip 3 and the backing plate 102.

[0058] In some of the exemplary implementations, combined with Figure 6 As shown, the metal water-blocking layer 4 and the metal water-blocking strip 3 are integrally formed. By making the metal water-blocking layer 4 and the metal water-blocking strip 3 integrally formed, the water-blocking performance can be effectively guaranteed, and the assembly process can be effectively reduced compared to the two being separate.

[0059] It is worth noting that when the metal water-blocking strip 3 and the metal water-blocking layer 4 are integrally formed, firstly, the metal water-blocking material is applied to the side of the thin-film battery cell 103 near the back plate 102 to form the metal water-blocking layer 4. Then, the metal water-blocking material is bent along the thickness direction of the thin-film battery cell 103 so that it can be applied to the circumference of the thin-film battery cell 103. Finally, the metal water-blocking material is applied to the front plate 101 to form the metal water-blocking strip 3 with the flange 301.

[0060] Based on the above overview, in the preferred embodiment where only the metal water-blocking strip 3 is provided without the metal water-blocking layer 4, or where both the metal water-blocking strip 3 and the metal water-blocking layer 4 are provided but overlapped, the metal water-blocking strip 3 is wrapped around the circumference of the thin-film battery cell 103, with the two free ends of the metal water-blocking strip 3 overlapping. This effectively ensures the sealing and water-blocking properties of the metal water-blocking strip 3. In specific implementation, the overlap length of the metal water-blocking strip 3 can be set to 5mm to effectively ensure the sealing at the overlap. Of course, whether the free ends of the metal water-blocking strip 3 overlap and the overlap length can be adjusted according to the actual situation to effectively ensure the sealing at the overlap of the metal water-blocking strip 3.

[0061] In some of the exemplary implementations, combined with Figure 4 As shown, the width W of the flange 301 is set to satisfy 0.1mm≤W≤3mm. Therefore, while improving the water resistance of the photovoltaic module by setting the flange 301, it can also effectively ensure the bonding area between the sealing strip 2 and the front panel 101 and the back panel 102, thereby effectively ensuring the structural stability of the photovoltaic module.

[0062] It is worth noting that, in specific implementation, the width W of the flange 301 can be set to 0.1mm, 1mm, 2mm or 3mm, etc. In this preferred embodiment, the width W of the flange 301 is set to 2mm. This setting can effectively ensure that the flange 301 is securely set in the sealing cavity 1b, and also facilitates the secure adhesion of the sealing strip 2 to the front plate 101 and the back plate 102.

[0063] In some of the exemplary implementations, combined with Figure 2 , Figure 4 , Figure 6 and Figure 7 As shown, the metal water-blocking tape 3 includes an aluminum-containing tape 3a, and the aluminum-containing tape 3a is coated with an adhesive layer 3b on at least one side corresponding to the thin-film battery cell 103.

[0064] Therefore, by incorporating an aluminum-containing tape 3a into the metal water-blocking strip 3, the metal water-blocking strip 3 not only possesses excellent water-blocking properties but also facilitates cost control and design implementation. Furthermore, by ensuring that at least one side of the aluminum-containing tape 3a has an adhesive layer 3b, the reliability of the aluminum-containing tape 3a can be effectively guaranteed.

[0065] It is worth noting that, as an optional implementation of the aluminum-containing tape 3a, in this embodiment, the aluminum-containing tape 3a includes an aluminum foil and an Eva waterproof coating applied to both sides of the aluminum foil. It should also be noted that the metal water-blocking layer 4 can be made of the same material as the metal water-blocking tape 3. Furthermore, an anti-reflective coating can be provided between the aluminum foil and the Eva waterproof coating; the specific material of the anti-reflective coating can be determined according to relevant specifications.

[0066] It is understandable that when a metal water-blocking layer 4 is provided, it is preferable to have adhesive layers 3b on both sides of the aluminum-containing tape 3a to ensure a sealed connection between the metal water-blocking tape 3 and the metal water-blocking layer 4. Simultaneously, it is preferable to have adhesive layers 3b on both sides of the metal water-blocking layer 4 to effectively improve the bonding reliability between the metal water-blocking layer 4 and the back plate 102. In specific implementation, the adhesive used for the adhesive layer 3b should be selected according to relevant technologies to meet the bonding requirements of the aluminum-containing tape 3a.

[0067] In some of the exemplary implementations, combined with Figure 2 , Figure 4 and Figure 6 As shown, the thin-film battery cell 103 is covered with an encapsulating film layer 5; a metal water-blocking strip 3 is wrapped around the encapsulating film layer 5.

[0068] Therefore, by setting the encapsulating film layer 5 and having the metal water-blocking strip 3 wrapped around the encapsulating film layer 5, the reliability of the metal water-blocking strip 3 setting can be improved, which in turn helps to improve the water resistance of the photovoltaic module, thereby improving the quality of the photovoltaic module.

[0069] It is understandable that when both the encapsulating film layer 5 and the metal water-blocking layer 4 are provided, the metal water-blocking layer 4 is also placed on the encapsulating film layer 5, which means that the metal water-blocking layer 4 is located between the back sheet 102 and the encapsulating film layer 5, thus improving the water-blocking and sealing performance of the photovoltaic module after encapsulation.

[0070] It is worth noting that, regarding the photovoltaic module of this embodiment, based on the above exemplary embodiments, in specific implementation, as a preferred embodiment, it is still composed of... Figures 1 to 7 As shown, it may include, for example, a photovoltaic body 1, which includes a front panel 101 and a back panel 102 stacked together, and a thin-film solar cell 103 sandwiched between the front panel 101 and the back panel 102. The thin-film solar cell 103 is disposed on the front panel 101. A sealing groove 1a is provided between the front panel 101 and the back panel 102, surrounding the thin-film solar cell 103. A sealing strip 2 is provided in the sealing groove 1a. The sealing strip 2, the front panel 101 and the back panel 102 form a sealing cavity 1b. A metal water-blocking strip 3 covering the thin-film solar cell 103 is provided in the sealing cavity 1b.

[0071] The metal water-blocking strip 3 has flanges 301 on both sides; one flange 301 extends along the plane of the thin-film battery cell 103 and is sandwiched between the back plate 102 and the sealing strip 2, or between the back plate 102 and the thin-film battery cell 103. The other flange 301 extends outward along the plane of the thin-film battery cell 103 and is sandwiched between the front plate 101 and the sealing strip 2.

[0072] In the preferred embodiments of the photovoltaic modules described above, the specific settings and arrangements of the photovoltaic body 1, the metal water-blocking strip 3, the metal water-blocking layer 4, etc., can still be referred to the descriptions in the above exemplary embodiments. Furthermore, in this preferred embodiment, the beneficial effects brought about by the design of the photovoltaic body 1, the metal water-blocking strip 3, and the metal water-blocking layer 4, etc., can also be referred to the descriptions in the above exemplary embodiments.

[0073] The photovoltaic module of this embodiment adopts the above design. A sealing strip 2 is provided in the sealing groove 1a between the front panel 101 and the back panel 102, and a metal water-blocking strip 3 is provided in the sealing cavity 1b formed by the sealing strip 2, the front panel 101, and the back panel 102. This design effectively avoids delamination caused by poor sealing between the sealing strip 2 and the front panel 101 and the back panel 102, preventing moisture from directly invading the photovoltaic module. This improves the sealing effect and water resistance of the thin-film solar cells 103, thereby enhancing the quality of the photovoltaic module.

[0074] An embodiment of the second aspect of this application provides a photovoltaic system having photovoltaic modules as described in the first aspect.

[0075] The photovoltaic system described in this application, by incorporating the photovoltaic modules as described above, can effectively improve the water resistance of the photovoltaic modules, thereby enhancing the durability of the photovoltaic system.

[0076] The above descriptions are merely some embodiments of this application and are not intended to limit this application. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of the claims of this application.

Claims

1. A photovoltaic module, characterized in that, include: A photovoltaic body (1) includes a front panel (101) and a back panel (102) stacked together, and a thin-film battery cell (103) sandwiched between the front panel (101) and the back panel (102), wherein the thin-film battery cell (103) is disposed on the front panel (101). A sealing groove (1a) is provided between the front plate (101) and the back plate (102) surrounding the thin-film battery cell (103); A sealing strip (2) is provided in the sealing groove (1a). The sealing strip (2), the front plate (101) and the back plate (102) form a sealing cavity (1b). A metal water-blocking strip (3) covering the thin-film battery cell (103) is provided in the sealing cavity (1b).

2. The photovoltaic module according to claim 1, characterized in that: The metal water-blocking strip (3) has a flange (301) on at least one side; The flange (301) extends along the plane of the thin-film battery cell (103) and is sandwiched between the back plate (102) and the sealing strip (2), or between the back plate (102) and the thin-film battery cell (103); and / or, The flange (301) extends outward along the plane of the thin-film battery sheet (103) and is sandwiched between the front plate (101) and the sealing strip (2).

3. The photovoltaic module according to claim 2, characterized in that: The metal water-blocking strip (3) is wrapped around the thin-film battery cell (103) circumferentially; the metal water-blocking strip (3) has flanges (301) on both sides; One of the flanges (301) extends outward along the plane of the thin-film battery sheet (103) and is sandwiched between the front plate (101) and the sealing strip (2); Another flange (301) extends outward along the plane of the thin-film battery sheet (103) and is sandwiched between the back plate (102) and the sealing strip (2).

4. The photovoltaic module according to claim 2, characterized in that: The metal water-blocking strip (3) is wrapped around the thin-film battery cell (103) circumferentially; the metal water-blocking strip (3) has flanges (301) on both sides; One of the flanges (301) extends outward along the plane of the thin-film battery sheet (103) and is sandwiched between the front plate (101) and the sealing strip (2); Another flange (301) extends inward along the plane of the thin-film battery cell (103) and is sandwiched between the back plate (102) and the thin-film battery cell (103).

5. The photovoltaic module according to claim 2, characterized in that: The metal water-blocking strip (3) is wrapped around the thin-film battery cell (103) circumferentially; The metal water-blocking strip (3) extends outward along the plane of the thin-film battery cell (103) and is sandwiched between the front plate (101) and the sealing strip (2) to form the flange (301); A metal water-blocking layer (4) is provided between the thin-film battery cell (103) and the back plate (102), and the metal water-blocking layer (4) is sealed to the metal water-blocking strip (3).

6. The photovoltaic module according to claim 5, characterized in that: The metal water-blocking layer (4) is laid on the metal water-blocking strip (3); and / or, The metal water-blocking layer (4) and the metal water-blocking strip (3) are integrally formed.

7. The photovoltaic module according to any one of claims 2 to 6, characterized in that: The width W of the flange (301) satisfies 0.1mm≤W≤3mm.

8. The photovoltaic module according to claim 1, characterized in that: The metal water-blocking tape (3) includes an aluminum-containing tape (3a); The aluminum-containing tape (3a) is coated with an adhesive layer (3b) on at least one side corresponding to the thin-film battery cell (103).

9. The photovoltaic module according to claim 1, characterized in that: The thin-film battery cell (103) is covered with an encapsulating film layer (5); The metal water-blocking tape (3) is wrapped around the encapsulating film layer (5).

10. A photovoltaic system, characterized in that: The photovoltaic system is equipped with a photovoltaic module as described in any one of claims 1 to 9.

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