Photovoltaic module

Abstract

The invention discloses a photovoltaic module, belongs to the technical field of solar cells, and mainly aims to change the extension direction of a leakage path and prolong the creepage distance. The photovoltaic assembly comprises a frame, a photovoltaic lamination assembly and a creepage structure. The photovoltaic laminated assembly is arranged in the frame; the creepage structure is arranged along the peripheral side face of the photovoltaic laminated assembly in an attached mode and surrounds the photovoltaic laminated assembly by one circle, and the edge, close to the upper surface of the photovoltaic laminated assembly, of the creepage structure is bent in the direction of the photovoltaic laminated assembly to form a first turned edge attached to the upper surface of the photovoltaic laminated assembly. The edge, close to the lower surface of the photovoltaic laminated assembly, of the creepage structure is bent in the direction of the photovoltaic laminated assembly to form a second flange attached to the lower surface of the photovoltaic laminated assembly, and the creepage structure is used for changing the extension direction of a leakage path between the photovoltaic laminated assembly and the frame, so that the leakage path extends to the first flange along the circumferential body of the creepage structure. Or the second flange extends to the second flange along the circumferential body of the creepage structure, so that the creepage distance is prolonged.

Description

Technical Field

[0001] This application belongs to the field of solar cell technology, specifically relating to a photovoltaic module. Background Technology

[0002] In photovoltaic (PV) module assembly, to prevent short circuits caused by direct contact between the frame and the cell array, a gap of a specific width is typically designed between the cell array and the frame; this area is called the creepage zone. The length of the creepage distance directly affects the insulation performance of the PV module and its overall lifespan. With the increasing prevalence of gigawatt-scale PV power plants globally, these large-scale power plants place higher demands on the operating voltage of PV systems to meet their high-power, high-efficiency power generation needs. This indirectly presents more stringent challenges to the design standards of the creepage distance in the creepage zone.

[0003] However, due to the limitations of the overall size design and installation space of photovoltaic modules, the width of the creepage zone cannot be increased indefinitely, making it difficult to meet the insulation standards for high-voltage scenarios. Summary of the Invention

[0004] In view of this, this application provides a photovoltaic module, the main purpose of which is to change the extension direction of the leakage path and extend the creepage distance.

[0005] To achieve the above objectives, this application mainly provides the following technical solutions: This application provides a photovoltaic module, including: frame; A photovoltaic laminated module, wherein the photovoltaic laminated module is disposed within the frame; A creepage structure is provided, which is attached to and surrounds the outer peripheral side of the photovoltaic laminate. The edge of the creepage structure near the upper surface of the photovoltaic laminate is bent towards the photovoltaic laminate to form a first flange that is attached to the upper surface of the photovoltaic laminate. The edge of the creepage structure near the lower surface of the photovoltaic laminate is bent towards the photovoltaic laminate to form a second flange that is attached to the lower surface of the photovoltaic laminate. The creepage structure is used to change the extension direction of the leakage path between the photovoltaic laminate and the frame, so that the leakage path extends along the circumferential body of the creepage structure to the first flange, or along the circumferential body of the creepage structure to the second flange, thereby extending the creepage distance.

[0006] Optionally, the photovoltaic laminate module includes a cell matrix, and the center plane of symmetry of the creepage structure coincides with the center plane of symmetry of the cell matrix in the thickness direction.

[0007] Optionally, the thickness of the creepage structure does not exceed 500 μm.

[0008] Optionally, the width of the portion of the first flange that contacts the upper surface of the photovoltaic laminate is the same as the width of the portion of the second flange that contacts the lower surface of the photovoltaic laminate.

[0009] Optionally, the width of the portion of the first flange that contacts the upper surface of the photovoltaic laminate and the width of the portion of the second flange that contacts the lower surface of the photovoltaic laminate are both no more than 11 mm.

[0010] Optionally, the creepage structure conforms to the formula: Q = X + H + Z; In the formula, Q is the creepage distance that the creepage structure needs to achieve under the target operating voltage of the photovoltaic module; X is the spacing between the cell matrix and the frame; H is half the thickness of the photovoltaic laminate module; and Z is the width of the contact portion between the first flange and the upper surface of the photovoltaic laminate module or the width of the contact portion between the second flange and the lower surface of the photovoltaic laminate module.

[0011] Optionally, the frame is provided with a groove structure, and the photovoltaic laminate and the creepage structure are snapped into the groove structure of the frame.

[0012] Optionally, the photovoltaic laminate and the creepage structure are filled with sealant between themselves and the frame.

[0013] Optionally, the photovoltaic laminated module further includes a first encapsulant layer and a second encapsulant layer, which are respectively disposed on both sides of the cell matrix.

[0014] Optionally, the photovoltaic laminated module further includes a front panel and a back panel, the front panel being disposed on the side of the first encapsulant layer away from the cell matrix, and the back panel being disposed on the side of the second encapsulant layer away from the cell matrix.

[0015] By employing the above technical solution, this application has at least the following beneficial effects: The creepage structure provided in this application adheres to and encircles the outer periphery of the photovoltaic laminate module. Through a bending design where the first flange adheres to the upper surface of the photovoltaic laminate module and the second flange adheres to the lower surface, it actively alters the direction of the leakage path between the photovoltaic laminate module and the frame. This eliminates the limitation of the narrow width of the traditional creepage area, allowing the leakage path to extend along the circumferential body of the creepage structure to either the first or second flange, significantly extending the creepage distance. Based on this, without increasing the overall size of the photovoltaic module or occupying additional installation space, it meets the stringent insulation performance requirements of gigawatt-scale large-scale photovoltaic power plants under high-voltage conditions. It effectively avoids short-circuit problems caused by insufficient insulation between the frame and the cell matrix, while ensuring the long-term stable operation of the photovoltaic module and extending its overall lifespan. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a photovoltaic module according to an optional embodiment of this application; Figure 2 This is a schematic diagram of the creepage structure of an optional embodiment of this application.

[0017] The reference numerals in the attached figures are as follows: 1. Frame; 11. Groove structure; 2. Photovoltaic laminate module; 21. Cell matrix; 22. First adhesive film layer; 23. Second adhesive film layer; 24. Front panel; 25. Back panel; 3. Creepage structure; 31. Circumferential body; 32. First flange; 33. Second flange; 4. Sealant. Detailed Implementation

[0018] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Therefore, they should not be construed as limitations on this application.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0020] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 according to the specific circumstances.

[0021] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0022] See also Figure 1 and Figure 2 As shown, according to an embodiment of this application, a photovoltaic module is provided, including a frame 1, a photovoltaic laminate 2, and a creepage structure 3; the photovoltaic laminate 2 is disposed within the frame 1; the creepage structure 3 is attached to the outer peripheral side of the photovoltaic laminate 2 and surrounds the photovoltaic laminate 2, and the edge of the creepage structure 3 near the upper surface of the photovoltaic laminate 2 is bent towards the photovoltaic laminate 2 to form a first flange 32 attached to the upper surface of the photovoltaic laminate 2, and the edge of the creepage structure 3 near the lower surface of the photovoltaic laminate 2 is bent towards the photovoltaic laminate 2 to form a second flange 33 attached to the lower surface of the photovoltaic laminate 2. The creepage structure 3 is used to change the extension direction of the leakage path between the photovoltaic laminate 2 and the frame 1, so that the leakage path extends along the circumferential body 31 of the creepage structure 3 to the first flange 32, or extends along the circumferential body 31 of the creepage structure 3 to the second flange 33, thereby extending the creepage distance.

[0023] The photovoltaic module provided in the embodiments of this application has a creepage structure 3 that is attached to and surrounds the outer periphery of the photovoltaic laminate module 2. Through a bending design where the first flange 32 is attached to the upper surface of the photovoltaic laminate module 2 and the second flange 33 is attached to the lower surface, the extension direction of the leakage path between the photovoltaic laminate module 2 and the frame 1 can be actively changed. This prevents the leakage path from being limited by the narrow width of the traditional creepage area, instead extending along the circumferential body 31 of the creepage structure 3 to the first flange 32 or the second flange 33, significantly extending the creepage distance. Based on this, without increasing the overall size of the photovoltaic module or occupying additional installation space, the stringent requirements for module insulation performance under high-voltage scenarios in gigawatt-level large-scale photovoltaic power plants can be met. This effectively avoids short-circuit problems caused by insufficient insulation between the frame 1 and the cell matrix 21, while ensuring the long-term stable operation of the photovoltaic module and extending the overall service life of the module.

[0024] Among them, the frame 1 serves as the framework structure of the entire photovoltaic module, mainly used to bear and support the overall shape of the photovoltaic module and protect the internal core functional components from external environmental impacts; the photovoltaic laminate module 2 is the core functional component that realizes the conversion of solar energy into electrical energy. Its whole is stably installed in the internal space enclosed by the frame 1, ensuring that while realizing the photoelectric conversion function, it also obtains structural protection by relying on the frame 1; the creepage structure 3 is arranged closely along the outer periphery of the photovoltaic laminate module 2 and forms a complete circle around the photovoltaic laminate module 2, ultimately forming a wrapping structure on the side of the photovoltaic laminate module 2, laying the foundation for subsequent changes in leakage path and extension of creepage distance.

[0025] Specifically, the creepage structure 3 is not a simple planar structure. Instead, it bends towards the photovoltaic laminate 2 at the edge near the upper surface of the photovoltaic laminate 2, forming a first flange 32 that adheres to the upper surface of the photovoltaic laminate 2. Similarly, it bends towards the photovoltaic laminate 2 at the edge near the lower surface of the photovoltaic laminate 2, forming a second flange 33 that adheres to the lower surface of the photovoltaic laminate 2. Therefore, the creepage structure 3 not only covers the sides of the photovoltaic laminate 2 but also extends to the upper and lower surfaces, forming a three-dimensional wrapping shape that covers the sides and extends to the upper and lower surfaces, effectively changing the direction of the leakage path. Compared to the traditional photovoltaic module where the leakage path extends linearly along the creepage gap and is limited by the gap width, in this application, the leakage current first extends linearly along the gap and then extends along the circumferential body 31 of the creepage structure 3 to the first flange 32 or the second flange 33. This extends the creepage distance without increasing the overall size of the module, thereby improving the insulation performance of the photovoltaic module and enabling it to meet the requirements of high-voltage applications.

[0026] It should be noted that, since the creepage structure 3 directly participates in guiding the leakage path, it must withstand the high-temperature environment of the photovoltaic module during long-term use and must have good insulation properties to avoid becoming a conductive medium and affecting the creepage effect. Therefore, the creepage structure 3 is made of high-temperature insulating material. In this embodiment, the creepage structure 3 is preferably Teflon tape. It can be understood that when Teflon tape is used as the creepage structure 3, it can be applied by cutting it to a size that fits the outer peripheral side of the photovoltaic laminate module 2, then wrapping it around the side, and bending its upper and lower edges toward the upper and lower surfaces of the photovoltaic laminate module 2 respectively, so that the first flange 32 and the second flange 33 are tightly bonded to the corresponding surfaces.

[0027] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 1 and Figure 2 As shown, the photovoltaic laminate module 2 includes a cell matrix 21, and the center plane of symmetry of the creepage structure 3 coincides with the center plane of symmetry of the cell matrix 21 in the thickness direction.

[0028] In this embodiment, by aligning the symmetrical center plane of the creepage structure 3 with the symmetrical center plane of the cell matrix 21 in the thickness direction, it is ensured that the creepage structure 3 is uniformly distributed in the thickness direction of the photovoltaic laminate 2. This ensures that the coverage areas of the first flange 32 extending from the creepage structure 3 on the upper surface of the photovoltaic laminate 2, the coverage areas of the second flange 33 on the lower surface, and the coverage areas of the circumferential body 31 of the creepage structure 3 on the side maintain a symmetrical and balanced positional relationship with the cell matrix 21, avoiding differences in local leakage path lengths caused by the creepage structure 3 being biased to one side. Furthermore, based on the symmetrical distribution, when the leakage current extends along the creepage structure 3, regardless of whether the leakage current originates from the cell matrix 21, it can extend uniformly along the symmetrical creepage path to the first flange 32 or the second flange 33. This prevents the problem of an excessively short leakage path and weak insulation performance on one side due to the offset of the creepage structure 3, thereby ensuring the consistency and stability of the insulation performance in the thickness direction of the photovoltaic laminate 2.

[0029] In some possible embodiments disclosed in this application, the thickness of the creepage structure 3 does not exceed 500 μm.

[0030] In this embodiment, by setting the thickness of the creepage structure 3 to no more than 500 μm, it is possible to ensure that it has sufficient physical strength to adhere to the outer periphery of the photovoltaic laminate module 2 and stably realize the functions of guiding leakage path and extending creepage distance, while minimizing the impact of the thickness of the creepage structure 3 itself on the overall size of the photovoltaic module. This avoids insufficient installation space or increased overall thickness of the photovoltaic module within the frame 1 due to excessive thickness of the structure. At the same time, the thinner thickness also helps the creepage structure 3 to adhere more tightly to the sides and upper and lower surfaces of the photovoltaic laminate module 2, reducing the bonding gap and avoiding the formation of additional leakage path due to the existence of gap, further ensuring the stability of the creepage effect.

[0031] The thickness of the creepage structure 3 can be 500um, 499um, or 498um, etc.

[0032] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 1 and Figure 2 As shown, the width of the first flange 32 in contact with the upper surface of the photovoltaic laminate 2 is the same as the width of the second flange 33 in contact with the lower surface of the photovoltaic laminate 2.

[0033] In this embodiment, by setting the width of the contact portion between the first flange 32 and the upper surface of the photovoltaic laminate 2 to be the same as the width of the contact portion between the second flange 33 and the lower surface of the photovoltaic laminate 2, it is possible to ensure that the extension coverage of the creepage structure 3 on the upper and lower surfaces of the photovoltaic laminate 2 remains symmetrical and balanced. On the one hand, this ensures that when the leakage current extends along the circumferential body 31 of the creepage structure 3 to the flanges on the upper and lower surfaces, the path length on both sides is consistent, avoiding the shortening of the leakage path and the appearance of weak areas in the insulation performance due to the excessively short contact width of the flange on one side, thus ensuring the consistency of the insulation performance of the photovoltaic laminate 2 in the vertical direction. On the other hand, the symmetrical flange contact width allows the adhesion force between the creepage structure 3 and the upper and lower surfaces of the photovoltaic laminate 2 to be more uniform, reducing problems such as local lifting and gaps caused by differences in the adhesion area, thereby avoiding the formation of additional leakage paths. At the same time, it can further complement the overall symmetrical distribution design of the creepage structure 3, enhance the stable guidance effect on the leakage path, and ensure the reliability and stability of the insulation performance of the photovoltaic module under high voltage scenarios.

[0034] In the above embodiments, the width of the contact portion between the first flange 32 and the upper surface of the photovoltaic laminate 2, and the width of the contact portion between the second flange 33 and the lower surface of the photovoltaic laminate 2, are both no more than 11 mm.

[0035] Here, the width of the contact portion between the first flange 32 and the upper surface of the photovoltaic laminate 2, and the width of the contact portion between the second flange 33 and the lower surface of the photovoltaic laminate 2, can be 11mm, 10mm, or 9mm, etc. On the one hand, while ensuring that the first flange 32 and the second flange 33 have sufficient contact area to stably adhere to the upper and lower surfaces of the photovoltaic laminate 2, effectively receive and guide the leakage current extending along the creepage structure 3 circumferentially towards the body 31, thereby maintaining the creepage distance extension effect, it avoids the first flange 32 and the second flange 33 having excessively large contact widths that would cover the light-receiving area of ​​the upper surface or the working area of ​​the lower surface of the photovoltaic laminate 2, thus preventing adverse effects on the photoelectric conversion efficiency, heat dissipation, and installation performance of the photovoltaic module; on the other hand, it avoids interference between the first flange 32 and the second flange 33 and the frame 1 or other component parts due to excessive width.

[0036] Furthermore, creepage structure 3 conforms to the formula: Q = X + H + Z; In the formula, Q is the creepage distance that the creepage structure 3 needs to achieve under the target operating voltage of the photovoltaic module; X is the spacing between the cell matrix 21 and the frame 1; H is half the thickness of the photovoltaic laminate 2; and Z is the width of the contact portion between the first flange 32 and the upper surface of the photovoltaic laminate 2 or the width of the contact portion between the second flange 33 and the lower surface of the photovoltaic laminate 2.

[0037] In this embodiment, by explicitly providing a quantitative calculation formula Q=X+H+Z between the required creepage distance Q of the creepage structure 3 and the spacing X between the cell matrix 21 and the frame 1, half the thickness H of the photovoltaic laminate module 2, and the flange contact width Z, it is possible to provide a precise and quantifiable basis for the design of the creepage structure 3 of the photovoltaic module under different target operating voltage scenarios. On the one hand, based on the target operating voltage requirements of specific application scenarios, the reasonable values ​​of parameters X, H, and Z can be derived and determined in reverse, avoiding insufficient or over-designed creepage distances due to blind parameter design, and achieving a balance between the scientific and economic aspects of the creepage structure 3 design. On the other hand, this formula directly links the creepage distance to the core structural parameters of the module, ensuring the adaptability of the creepage distance design to the overall structure of the module. It can ensure that the photovoltaic module meets the insulation performance requirements of different high-voltage scenarios while taking into account the photoelectric conversion efficiency, installation space, and structural stability of the module, providing key technical support for the standardized and regulated production of photovoltaic modules.

[0038] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 1 As shown, a groove structure 11 is provided on the frame 1, and the photovoltaic laminate module 2 and the creepage structure 3 are snapped into the groove structure 11 of the frame 1.

[0039] In this embodiment, the groove structure 11 provides precise positioning and a stable assembly space for the photovoltaic laminate module 2 and the creepage structure 3. The snap-fit ​​method allows for rapid initial fixing of the photovoltaic laminate module 2 and the creepage structure 3 to the frame 1. Compared to traditional bolt connections, this simplifies the assembly process, reduces the risk of mechanical damage to the edges of the photovoltaic laminate module 2 and the creepage structure 3, and ensures the stability of the photovoltaic laminate module 2 and the creepage structure 3 within the frame 1, preventing module displacement due to vibration, temperature changes, or other factors during long-term use. Simultaneously, the groove structure 11 provides some shielding and protection for the connection gap between the photovoltaic laminate module 2 and the creepage structure 3 and the frame 1, reducing the direct intrusion of external dust, moisture, and other contaminants into the creepage area, lowering the rate of contaminant accumulation in the creepage area, and indirectly helping to maintain the insulation performance of the creepage structure 3. Furthermore, the groove structure 11 enhances the overall structural strength of the photovoltaic module, making the support of the frame 1 for the photovoltaic laminate module 2 more uniform, improving the photovoltaic module's ability to resist external impacts, and ensuring long-term stable operation of the module.

[0040] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 1 As shown, sealant 4 is filled between the photovoltaic laminate module 2 and the creepage structure 3 and the frame 1.

[0041] In this embodiment, by filling the space between the photovoltaic laminate module 2 and the creepage structure 3 and the frame 1 with sealant 4, a reliable sealing barrier can be formed, effectively blocking the intrusion of moisture, dust, and corrosive gases from the external environment. This prevents the insulation performance of the creepage structure 3 from being damaged and the leakage path from being abnormally shortened, further ensuring the stability of the creepage distance extension effect and reducing the risk of short circuits caused by insulation failure. At the same time, the sealant 4 can flexibly bond the photovoltaic laminate module 2 and the creepage structure 3 to the frame 1, which not only strengthens the assembly stability of the photovoltaic laminate module 2, the creepage structure 3 and the frame 1, avoiding module displacement or loosening of the creepage structure 3 due to vibration and temperature cycling during long-term use, but also absorbs the thermal expansion and contraction stress of the photovoltaic module during operation through its own buffering effect, reducing rigid friction or extrusion damage between the frame 1 and the photovoltaic laminate module 2, and protecting the integrity of the components.

[0042] Among them, sealant 4 can be silicone or the like.

[0043] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 1 As shown, the photovoltaic laminated module 2 also includes a first encapsulant layer 22 and a second encapsulant layer 23, which are respectively disposed on both sides of the cell matrix 21.

[0044] In this embodiment, as the direct encapsulation layer of the cell matrix 21, the first encapsulating layer 22 and the second encapsulating layer 23 can isolate the cell matrix 21 from the external environment, effectively blocking the intrusion of pollutants such as moisture and dust, and preventing the cells from becoming damp or contaminated, which could lead to a decrease or failure in power generation performance. At the same time, they can buffer the direct impact of external mechanical shocks on the cells, reducing the risk of microcracks or breakage caused by vibration and collision, and ensuring the stability of the structure and power generation function of the cell matrix 21. Meanwhile, through the adhesive properties of the first encapsulating layer 22 and the second encapsulating layer 23, the cell matrix 21 can be firmly bonded to the other structural layers of the photovoltaic laminate module 2 into a whole, improving the structural integrity and anti-peeling ability of the photovoltaic laminate module 2, and preventing delamination between layers during long-term outdoor use.

[0045] The first adhesive film layer 22 and the second adhesive film layer 23 can be made of ethylene-vinyl acetate copolymer adhesive film layer or polyolefin elastomer adhesive film layer.

[0046] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 1 As shown, the photovoltaic laminate module 2 also includes a front panel 24 and a back panel 25. The front panel 24 is disposed on the side of the first encapsulant layer 22 away from the cell matrix 21, and the back panel 25 is disposed on the side of the second encapsulant layer 23 away from the cell matrix 21.

[0047] In this embodiment, the front panel 24 serves as the front protective layer of the photovoltaic module. It ensures high light transmittance to guarantee efficient light energy reception by the cell matrix 21 while resisting external environmental erosion such as outdoor ultraviolet radiation, wind and rain, and sand and dust abrasion, preventing direct exposure and damage to the internal structure. The back panel 25 serves as the back protective layer, further blocking the intrusion of moisture, oxygen, and corrosive substances. Together with the front panel 24, they form a comprehensive physical and environmental barrier, effectively protecting the cell matrix 21 and the encapsulant layer, slowing down the aging of the module, and ensuring long-term stable power generation performance. Furthermore, both the front panel 24 and the back panel 25 possess a certain structural strength. Their combined use enhances the overall rigidity and deformation resistance of the photovoltaic laminate module 2, preventing bending and cracking due to external forces or temperature changes during transportation, installation, and long-term use. They also help fix the internal layers, preventing interlayer displacement or delamination, further improving the structural stability and lifespan of the photovoltaic module, ensuring its long-term adaptability to the harsh outdoor operating environment of gigawatt-level photovoltaic power plants.

[0048] The front panel 24 can be made of glass, preferably ultra-white tempered glass.

[0049] The back panel 25 can be made of polyvinyl fluoride composite board or polyolefin composite board.

[0050] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0051] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A photovoltaic module, characterized in that, include: frame; A photovoltaic laminated module, wherein the photovoltaic laminated module is disposed within the frame; A creepage structure is provided, which is attached to and surrounds the outer peripheral side of the photovoltaic laminate. The edge of the creepage structure near the upper surface of the photovoltaic laminate is bent towards the photovoltaic laminate to form a first flange that is attached to the upper surface of the photovoltaic laminate. The edge of the creepage structure near the lower surface of the photovoltaic laminate is bent towards the photovoltaic laminate to form a second flange that is attached to the lower surface of the photovoltaic laminate. The creepage structure is used to change the extension direction of the leakage path between the photovoltaic laminate and the frame, so that the leakage path extends along the circumferential body of the creepage structure to the first flange, or along the circumferential body of the creepage structure to the second flange, thereby extending the creepage distance.

2. The photovoltaic module according to claim 1, characterized in that, The photovoltaic laminate module includes a cell matrix, and the center plane of symmetry of the creepage structure coincides with the center plane of symmetry of the cell matrix in the thickness direction.

3. The photovoltaic module according to claim 1, characterized in that, The thickness of the creepage structure does not exceed 500 μm.

4. The photovoltaic module according to claim 1, characterized in that, The width of the portion of the first flange that contacts the upper surface of the photovoltaic laminate is the same as the width of the portion of the second flange that contacts the lower surface of the photovoltaic laminate.

5. The photovoltaic module according to claim 4, characterized in that, The width of the portion of the first flange that contacts the upper surface of the photovoltaic laminate and the width of the portion of the second flange that contacts the lower surface of the photovoltaic laminate are both no more than 11 mm.

6. The photovoltaic module according to claim 5, characterized in that, The creepage structure conforms to the formula: Q = X + H + Z; In the formula, Q is the creepage distance that the creepage structure needs to achieve under the target operating voltage of the photovoltaic module; X is the spacing between the cell matrix and the frame; H is half the thickness of the photovoltaic laminate module; and Z is the width of the contact portion between the first flange and the upper surface of the photovoltaic laminate module or the width of the contact portion between the second flange and the lower surface of the photovoltaic laminate module.

7. The photovoltaic module according to claim 1, characterized in that, The frame is provided with a groove structure, and the photovoltaic laminate and the creepage structure are snapped into the groove structure of the frame.

8. The photovoltaic module according to claim 7, characterized in that, The photovoltaic laminate and the creepage structure are filled with sealant between themselves and the frame.

9. The photovoltaic module according to claim 2, characterized in that, The photovoltaic laminated module further includes a first encapsulant layer and a second encapsulant layer, which are respectively disposed on both sides of the cell matrix.

10. The photovoltaic module according to claim 9, characterized in that, The photovoltaic laminated module further includes a front panel and a back panel. The front panel is disposed on the side of the first encapsulant layer away from the cell matrix, and the back panel is disposed on the side of the second encapsulant layer away from the cell matrix.

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