Photovoltaic module

Abstract

The utility model relates to a photovoltaic module, which comprises a cover plate, a back plate, a battery string and a damping adhesive tape. The vibration reduction rubber strip comprises a vibration reduction base body and a vibration reduction body, a containing cavity is formed in the vibration reduction base body, the vibration reduction body is arranged in the containing cavity, and the containing cavity can be compressed. Therefore, when the outside impacts the photovoltaic module, the accommodating cavity is compressed, and the damping adhesive tape plays a role in buffering and damping, so as to resist the outside impact, prevent the battery string from being damaged, and prolong the service life of the photovoltaic module.

Description

Technical Field

[0001] This utility model relates to a photovoltaic module. Background Technology

[0002] Photovoltaic modules, as the core component of a photovoltaic power generation system, include a cover plate, a backsheet, and a string of cells encapsulated between the cover plate and the backsheet by an adhesive layer. When the cover plate and backsheet are made of glass, they can be installed in environments with high load-bearing capacity, such as large-area installations on the ground. When the cover plate and backsheet are made of plastic or other polymer films, the weight of the photovoltaic modules can be reduced, allowing them to be installed in environments with lower load-bearing capacity, such as industrial and commercial light steel roofs.

[0003] However, regardless of the type of photovoltaic module, the internal battery strings are prone to resonance under external impact, which can damage the battery strings and affect the lifespan of the photovoltaic module.

[0004] In conclusion, there is an urgent need for a photovoltaic module with good vibration reduction performance. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a photovoltaic module with good vibration reduction performance.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solutions.

[0007] A photovoltaic module includes: a cover plate, a back plate, a battery string encapsulated between the cover plate and the back plate, and a vibration damping strip encapsulated between the cover plate and the back plate without obstructing the battery string; the vibration damping strip includes a vibration damping substrate and a vibration damping body, the vibration damping substrate has a receiving cavity, the vibration damping body is disposed in the receiving cavity, and the receiving cavity is compressed.

[0008] Optionally, the damper is an elastic body.

[0009] Optionally, the material of the damping matrix includes at least one of ethylene-vinyl acetate copolymer, polyolefin elastomer, polyethylene foam, polyvinyl butyral, and thermoplastic polyolefin, and the material of the damping body includes at least one of nitrile rubber and chloroprene rubber.

[0010] Optionally, a compressible gap is formed between the damper and the receiving cavity.

[0011] Optionally, the receiving cavity is a groove with an opening facing the battery string, and the vibration damper is located within the groove.

[0012] Optionally, the vibration damping strip is located between the battery string and the cover plate, and the vibration damping substrate has a strip-shaped structure, including multiple wave crest structures spaced apart, with the grooves formed on the surface of the wave crest structures facing the battery string.

[0013] Optionally, the receiving cavity is a closed cavity structure, and the vibration damper is located inside the cavity structure.

[0014] Optionally, the cover plate includes an upper plate, a honeycomb core layer, and a lower plate, all of which are light-transmitting and stacked sequentially; the upper plate is located away from the battery string relative to the lower plate.

[0015] Optionally, the honeycomb core layer includes a plurality of interconnected honeycomb holes, and each honeycomb hole is provided with a reinforcing member connecting to the inner wall of the honeycomb hole.

[0016] Optionally, each of the honeycomb holes is provided with a plurality of reinforcing members, and the honeycomb holes are also provided with connecting members, and the plurality of reinforcing members are connected to each other through the connecting members.

[0017] Optionally, the cross-section of the reinforcing member perpendicular to the conduction direction of the honeycomb holes is Y-shaped or X-shaped.

[0018] Optionally, the materials of the upper plate, the honeycomb core layer, and the lower plate all include at least one of polycarbonate and polymethyl methacrylate.

[0019] Optionally, the outer surface of the upper plate is provided with an ultraviolet protection layer.

[0020] Optionally, the backplate includes a first adhesive film, a reinforcing rib, a second adhesive film, and a support plate stacked sequentially, wherein the reinforcing rib is close to the battery string relative to the support plate, and the first adhesive film is connected to the battery string through a third adhesive film.

[0021] Optionally, the reinforcing ribs are in the form of a honeycomb-shaped mesh structure.

[0022] Optionally, the reinforcing rib is made of glass fiber with a diameter of 50-60 μm.

[0023] Optionally, the material of the first adhesive film includes at least one of polyvinyl butyral and thermoplastic polyolefin; the materials of the second and third adhesive films each include at least one of ethylene-vinyl acetate copolymer, polyolefin elastomer and polyethylene foam; and the material of the support plate includes at least one of polypropylene and polycarbonate.

[0024] Optionally, the vibration damping strip is connected to the battery string via a fourth adhesive film, the material of which includes at least one of ethylene-vinyl acetate copolymer, polyolefin elastomer, and polyethylene foam.

[0025] Optionally, the photovoltaic module further includes a frame, the frame including a receiving groove that receives the edges of the lower layer and the back panel, the end of the wall of the receiving groove abutting against the side of the honeycomb core layer and located between the upper layer and the lower layer.

[0026] Optionally, the distance between the upper surface of the lower plate and the lower surface of the back plate is less than the opening width of the receiving groove of the frame, and the receiving groove and the back plate are filled with an adhesive.

[0027] The technical solution of this utility model has the following beneficial effects:

[0028] The photovoltaic module provided by this utility model has a vibration damping strip between the cover plate and the back plate. The vibration damping strip includes a vibration damping base and a vibration damping body. The vibration damping body is set in the receiving cavity of the vibration damping base, and the receiving cavity can be compressed. In this way, when the photovoltaic module is subjected to an external impact force, the receiving cavity is compressed, and the vibration damping strip plays a role in buffering and damping to resist the external impact force, avoid damage to the battery string, and improve the service life of the photovoltaic module. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of a photovoltaic module structure provided in an embodiment of the present invention;

[0030] Figure 2 A top view of a vibration damping strip provided in an embodiment of this utility model;

[0031] Figure 3 This is a schematic diagram showing the relative positions between the vibration damping strip and the battery string according to an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the cross-sectional structure of a vibration damping rubber strip provided in an embodiment of the present invention;

[0033] Figure 5 This is a schematic diagram of the cross-sectional structure of the vibration damping strip provided in another embodiment of the present utility model;

[0034] Figure 6 This is a schematic diagram of the structure of a honeycomb core layer provided in an embodiment of the present invention;

[0035] Figure 7 This is a schematic diagram of the reinforcing rib provided in one embodiment of the present invention.

[0036] Among them, 1-cover plate; 11-upper plate; 12-honeycomb core layer; 121-honeycomb hole; 122-reinforcing member; 123-connector; 13-lower plate; 2-vibration damping strip; 21-vibration damping substrate; 22-vibration damping body; 23-accommodating cavity; 3-fourth adhesive film; 4-battery string; 5-third adhesive film; 6-back plate; 61-first adhesive film; 62-reinforcing rib; 63-second adhesive film; 64-support plate; 7-frame. Detailed Implementation

[0037] In practical applications, photovoltaic (PV) modules inevitably suffer from external impacts, especially lightweight PV modules, where the cell strings are more susceptible to damage. For example, lightweight PV modules often use polyethylene terephthalate, ethylene-vinyl acetate copolymer, or fluoroplastics as cover materials instead of conventional glass. When these modules encounter severe hailstorms, the cell strings are prone to resonance under intense external impact, leading to damage to the internal cell strings. This not only affects the power generation of the PV module and shortens its lifespan but may also cause serious safety issues such as fires, posing a severe threat to the stability and safety of the entire PV system. To address these technical problems, this utility model provides the following PV module.

[0038] like Figure 1 As shown, the photovoltaic module provided in this embodiment of the present invention may include: a cover plate 1, a back plate 6, a battery string 4 encapsulated between the cover plate 1 and the back plate 6, and a vibration damping strip 2 encapsulated between the cover plate 1 and the back plate 6 but not obstructing the battery string 4. Wherein, as... Figure 2 As shown, the damping strip 2 may include a damping base 21 and a damping body 22. The damping base 21 may be provided with a receiving cavity 23, and the damping body 22 may be disposed in the receiving cavity 23. The receiving cavity 23 may be compressed.

[0039] The photovoltaic module provided by this utility model features a vibration-damping strip 2 between the cover plate 1 and the back plate 6. The vibration-damping strip 2 includes a vibration-damping substrate 21 and a vibration-damping body 22. The vibration-damping body 22 is disposed within a cavity 23 of the vibration-damping substrate 21, and the cavity 23 is compressible. Thus, when an external force impacts the photovoltaic module, the cavity 23 is compressed, thereby the vibration-damping strip 2 acts as a buffer and damper to resist the external impact, prevent damage to the battery string 4, and improve the service life of the photovoltaic module.

[0040] Among them, such as Figure 3 As shown, the vibration damping strip 2 does not obstruct the battery string 4, or in other words, the vibration damping strip 2 can be placed on the edge of the battery string 4 to avoid affecting the light absorption efficiency of the battery string 4. Specifically, when the vibration damping strip 2 is placed on the edge of the battery string 4, it can be located on the same layer as the battery string 4, or it can be aligned with the edge of the battery string 4 and located on a different layer from the battery string 4.

[0041] In this embodiment of the invention, the compressibility of the receiving cavity 23 can be achieved through the following embodiments:

[0042] In some embodiments, the damping body 22 can be an elastomer. When the photovoltaic module is subjected to external impact, the damping substrate 21 can compress the elastomer, increasing the deformation of the damping strip 2, thereby achieving better damping and buffering effects. Specifically, the damping body 22 can absorb a large amount of impact energy through its own deformation, converting the energy into elastic potential energy or heat energy, thus achieving a buffering effect and effectively reducing the impact energy transmitted to the inside of the photovoltaic module, providing the most direct protective barrier for the battery string 4. Specifically, the shape of the elastomer can be spherical, cylindrical, cubic, or other shapes.

[0043] In some embodiments, the material of the damping substrate 21 may include at least one of ethylene-vinyl acetate copolymer, polyolefin elastomer, polyethylene foam, polyvinyl butyral, and thermoplastic polyolefin. This makes the damping substrate 21 softer than glass or metal and has a certain degree of deformability under impact, thereby making the damping substrate 21 itself compressible so that the damping strip 2 as a whole is elastic and can be compressed.

[0044] The material of the damper 22 may include at least one of nitrile rubber and neoprene rubber, so that the damper 22 has elastic properties.

[0045] In addition, due to its soft properties, the vibration damping strip 2 can evenly distribute local impact force over a large area, which helps to avoid excessive local stress from damaging the photovoltaic module structure.

[0046] In other embodiments, a compressible gap is formed between the damper 22 and the receiving cavity 23. Thus, when an external force impacts the photovoltaic module, the gap is compressed, allowing the damping strip 2 to act as a buffer and damper to resist the impact, prevent damage to the battery string 4, and improve the lifespan of the photovoltaic module. In this embodiment, the number of receiving cavities 23 can be multiple, and they can be evenly distributed on the damping base 21. Each receiving cavity 23 can accommodate one damper 22, or multiple dampers 22. The receiving cavity 23 can be designed in various forms; several embodiments are given below:

[0047] In one embodiment, such as Figure 1 or Figure 4As shown, the receiving cavity 23 can be a groove with its opening facing the battery string 4, and the vibration damper 22 can be located inside the groove. The vibration damping strip 2 can be located between the cover plate 1 and the battery string 4, or between the back plate 6 and the battery string 4. Since the photovoltaic module is subject to many impact factors on the light-receiving surface, it is preferable to place the vibration damping strip 2 between the cover plate 1 and the battery string 4, and the vibration damping strip 2 is connected to the battery string 4 through the fourth adhesive film 3. When the receiving cavity 23 can be compressed due to the gap, the opening of the groove faces downward, and a gap is formed between the top of the groove and the vibration damper 22. When subjected to external impact force, the gap at the top of the vibration damper 22 is compressed to play a role in vibration reduction and buffering.

[0048] Further reference Figure 4 The damping substrate 21 can be a strip-shaped structure, comprising multiple spaced-apart wave crest structures, wherein the surface of the wave crest structures facing the battery string 4 forms grooves. It is understood that the wave crest structures form convex surfaces on the surface of the damping substrate 21, and concave surfaces are formed between adjacent wave crest structures. With this configuration, when subjected to external impact, the top of the wave crest structure is compressed first, subsequently compressing the gap between the receiving cavity 23 and the damping body 22 and / or compressing the elastic damping body 22. Because the wave crest structure is convex, it can generate multi-directional deformation, such as vertical and lateral forces, thereby dispersing the impact force in multiple dimensions, resulting in a more three-dimensional and efficient buffering effect. In this way, the damping substrate 21 and the damping body 22 work together to more effectively eliminate external impact forces, thus protecting the battery string 4.

[0049] In another embodiment, such as Figure 5 As shown, the receiving cavity 23 can also be a closed cavity structure, and the damping body 22 can be located inside the cavity structure, thereby preventing the damping body 22 from detaching from the damping base 21.

[0050] In some embodiments, continue to refer to Figure 1 The cover plate 1 may include an upper plate 11, a honeycomb core layer 12, and a lower plate 13, all of which are translucent and stacked sequentially. The upper plate 11 is located further away from the battery string 4 than the lower plate 13. The structure of the honeycomb core layer 12 reduces the weight of the cover plate 1 and evenly distributes small-area localized forces across the entire cover plate 1, transforming high-intensity point stress into low-intensity surface stress. The honeycomb structure contains numerous regular pores, which collapse under impact, effectively absorbing impact energy and reducing the impact force transmitted to components such as the vibration-damping strip 2 and the battery string 4.

[0051] Furthermore, such as Figure 6As shown, the honeycomb core layer 12 may include multiple interconnected honeycomb holes 121. Each honeycomb hole 121 may be provided with a reinforcing member 122 connecting to the inner wall of the honeycomb hole 121, which can improve the density of the honeycomb interior and increase the plastic deformation area during the impact process, thereby increasing the load-bearing capacity and impact resistance of the honeycomb core layer 12. Each honeycomb hole 121 may have one reinforcing member 122 or multiple reinforcing members 122. When multiple reinforcing members 122 are provided in each honeycomb hole 121, a connecting member 123 is also provided in the honeycomb hole 121. The multiple reinforcing members 122 are interconnected through the connecting member 123, which further enhances the impact resistance and load-bearing capacity of the cover plate 1. The cross-section of the reinforcing member 122 perpendicular to the conduction direction of the honeycomb hole 121 may be Y-shaped or X-shaped.

[0052] In some embodiments, the materials of the upper plate 11, the honeycomb core layer 12, and the lower plate 13 may include at least one of polycarbonate and polymethyl methacrylate, with a transparency of 90%-95%, such as 90%, 92%, 94%, or 95%. These materials enable the cover plate 1 to have good light transmittance and good weather resistance, thereby protecting the battery string 4.

[0053] Furthermore, the outer surface of the upper plate 11 may be provided with an ultraviolet protection layer, which may be a fluorine-containing coating to resist ultraviolet radiation and prevent the photovoltaic module from aging.

[0054] In some embodiments, continue to refer to Figure 1 The backplate 6 may include a first adhesive film 61, a reinforcing rib 62, a second adhesive film 63, and a support plate 64 stacked sequentially. The reinforcing rib 62 is close to the battery string 4 relative to the support plate 64, and the first adhesive film 61 is connected to the battery string 4 through a third adhesive film 5. The proximity of the reinforcing rib 62 to the battery string 4 can share and buffer external forces, thereby reducing the risk of deformation and microcracks in the battery string 4.

[0055] In some embodiments, such as Figure 7 As shown, the reinforcing rib 62 can be a honeycomb-shaped mesh structure, which can reduce the weight of the photovoltaic module while dispersing the external pressure on the photovoltaic module, and this structure has the advantages of high strength and high support. The honeycomb shape can be polygonal, such as pentagonal, hexagonal or irregular shape.

[0056] In some embodiments, the reinforcing rib 62 may be made of glass fiber with a diameter of 50-60 μm, thereby improving the load-bearing capacity of the back plate 6. The diameter of the glass fiber may be 50 μm, 52 μm, 54 μm, 56 μm, 58 μm, or 60 μm, etc.

[0057] Furthermore, the material of the first encapsulating film 61 may include at least one of polyvinyl butyral and thermoplastic polyolefin. The first encapsulating film 61 is located above the reinforcing rib 62, providing a certain supporting function and resisting impact to protect the battery string 4. The materials of the second encapsulating film 62, the third encapsulating film 5, and the fourth encapsulating film 3 may all include at least one of ethylene-vinyl acetate copolymer, polyolefin elastomer, and polyethylene foam, for bonding the structure of each component and encapsulating and protecting the photovoltaic module. The material of the support plate 64 may include at least one of polypropylene and polycarbonate, giving it good protective properties, weather resistance, and electrical insulation properties, and making it lighter than a traditional glass plate.

[0058] In some embodiments, continue to refer to Figure 1 The photovoltaic module may also include a frame 7, wherein the frame 7 may include a receiving groove that can accommodate the edges of the lower layer 13 and the back panel 6. The end of the wall of the receiving groove may abut against the side of the honeycomb core layer 12 and be located between the upper layer 11 and the lower layer 13. Since the horizontal height of the frame 7 is lower than the horizontal height of the photovoltaic module, this embedded method allows dust or foreign objects accumulated on the front of the photovoltaic module to slide off from all sides of the photovoltaic module under the scouring action of rainwater, effectively avoiding the hot spot phenomenon caused by foreign objects blocking the photovoltaic module for a long time, thereby avoiding affecting the performance of the photovoltaic module.

[0059] Furthermore, the distance between the upper surface of the lower plate 13 and the lower surface of the back plate 6 can be less than the opening width of the receiving groove of the frame 7, so as to facilitate the insertion of the laminate into the frame 7. An adhesive can be filled between the receiving groove and the back plate 6 for encapsulating the photovoltaic module. The adhesive can be formed by silicone.

[0060] In summary, the above are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A photovoltaic module, characterized in that, The photovoltaic module includes: Cover plate (1); Backplate (6); Battery string (4) encapsulated between the cover plate (1) and the backplate (6); A vibration damping strip (2) is encapsulated between the cover plate (1) and the back plate (6) and does not obstruct the battery string (4). The vibration damping strip (2) includes a vibration damping base (21) and a vibration damping body (22). The vibration damping base (21) is provided with a receiving cavity (23). The vibration damping body (22) is disposed in the receiving cavity (23). The receiving cavity (23) is compressed.

2. The photovoltaic module according to claim 1, characterized in that, The damping body (22) is an elastic body.

3. The photovoltaic module according to claim 1, characterized in that, The material of the damping substrate (21) includes one of ethylene-vinyl acetate copolymer, polyolefin elastomer, polyethylene foam, polyvinyl butyral and thermoplastic polyolefin, and the material of the damping body (22) includes nitrile rubber or chloroprene rubber.

4. The photovoltaic module according to claim 1, characterized in that, The vibration damping strip (2) is connected to the battery string (4) through a fourth adhesive film (3), the material of which includes ethylene-vinyl acetate copolymer or polyolefin elastomer.

5. The photovoltaic module according to claim 1, characterized in that, A compressible gap is formed between the damper (22) and the receiving cavity (23).

6. The photovoltaic module according to claim 2 or 5, characterized in that, The receiving cavity (23) is a groove with an opening facing the battery string (4), and the damping body (22) is located in the groove.

7. The photovoltaic module according to claim 6, characterized in that, The vibration damping strip (2) is located between the battery string (4) and the cover plate (1). The vibration damping substrate (21) has a strip-shaped structure, including multiple wave crest structures spaced apart. The groove is formed on the surface of the wave crest structure facing the battery string (4).

8. The photovoltaic module according to claim 2 or 5, characterized in that, The receiving cavity (23) is a closed cavity structure, and the vibration damper (22) is located inside the cavity structure.

9. The photovoltaic module according to claim 1, characterized in that, The cover plate (1) includes an upper plate (11), a honeycomb core layer (12) and a lower plate (13) that are all light-transmitting and stacked in sequence; the upper plate (11) is away from the battery string (4) relative to the lower plate (13).

10. The photovoltaic module according to claim 9, characterized in that, The honeycomb core layer (12) includes a plurality of interconnected honeycomb holes (121), and each honeycomb hole (121) is provided with a reinforcing member (122) that connects to the inner wall of the honeycomb hole (121).

11. The photovoltaic module according to claim 10, characterized in that, Each of the honeycomb holes (121) is provided with a plurality of reinforcing members (122), and the honeycomb holes (121) are also provided with connecting members (123), and the plurality of reinforcing members (122) are interconnected by the connecting members (123).

12. The photovoltaic module according to claim 10, characterized in that, The cross-section of the reinforcing member (122) perpendicular to the conduction direction of the honeycomb hole (121) is Y-shaped or X-shaped.

13. The photovoltaic module according to claim 9, characterized in that, The materials of the upper plate (11), the honeycomb core layer (12) and the lower plate (13) all include polycarbonate or polymethyl methacrylate.

14. The photovoltaic module according to claim 9, characterized in that, The outer surface of the upper plate (11) is provided with an ultraviolet protection layer.

15. The photovoltaic module according to claim 1, characterized in that, The backplate (6) includes a first adhesive film (61), a reinforcing rib (62), a second adhesive film (63), and a support plate (64) stacked in sequence. The reinforcing rib (62) is close to the battery string (4) relative to the support plate (64). The first adhesive film (61) is connected to the battery string (4) through a third adhesive film (5).

16. The photovoltaic module according to claim 15, characterized in that, The reinforcing rib (62) has a honeycomb-shaped mesh structure.

17. The photovoltaic module according to claim 15, characterized in that, The reinforcing rib (62) is made of glass fiber with a diameter of 50-60 μm.

18. The photovoltaic module according to claim 15, characterized in that, The material of the first adhesive film (61) includes polyvinyl butyral or thermoplastic polyolefin; the materials of the second adhesive film (63) and the third adhesive film (5) both include ethylene-vinyl acetate copolymer or polyolefin elastomer; the material of the support plate (64) includes polypropylene or polycarbonate.

19. The photovoltaic module according to claim 9, characterized in that, The photovoltaic module also includes a frame (7), which includes a receiving groove that receives the edges of the lower plate (13) and the back plate (6). The end of the wall of the receiving groove abuts against the side of the honeycomb core layer (12) and is located between the upper plate (11) and the lower plate (13).

20. The photovoltaic module according to claim 19, characterized in that, The distance between the upper surface of the lower plate (13) and the lower surface of the back plate (6) is less than the opening width of the receiving groove of the frame (7), and the receiving groove and the back plate (6) are filled with adhesive.

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