Cover plate applied to photovoltaic module and photovoltaic module

Abstract

The utility model discloses a cover plate applied to a photovoltaic assembly and the photovoltaic assembly, and relates to the technical field of photovoltaic assemblies, and the cover plate comprises at least one first groove; wherein the first groove is formed in the edge area of the upper surface of the cover plate, and the depth of the first groove is smaller than the thickness of the cover plate; when the cover plate is applied to the photovoltaic module, the first groove is covered by at least one edge of a frame included by the photovoltaic module. According to the cover plate, the first groove is formed in the edge area of the upper surface, and water vapor gathering can be achieved through the first groove in the permeation process of water vapor, so that the situation that the water vapor further permeates into the laminated structure of the photovoltaic module is slowed down, the loss of the electrical performance of the photovoltaic module is reduced, and meanwhile the service life of the photovoltaic module is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic module manufacturing technology, and in particular to a cover plate for photovoltaic modules and a photovoltaic module. Background Technology

[0002] Existing photovoltaic (PV) modules consist of a laminated module body and a frame installed around the module body. The upper and lower surfaces of the module body are made of glass cover plates and back sheets. To seal the module body, a filler is usually placed between the frame and the module body. Although the filler prevents water droplets and dust from entering the laminated structure of the module body along the cover plate, the available filler materials (such as butyl rubber or low water permeability water-resistant adhesives) have poor water-blocking stability. After water droplets vaporize, moisture often slowly seeps into the module body along the interface between the insulating adhesive and the cover plate, leading to a loss of electrical performance of the PV module. Utility Model Content

[0003] In view of this, the present invention provides a cover plate for photovoltaic modules and a photovoltaic module. By setting a first groove in the edge area of ​​the upper surface of the cover plate, water vapor can be accumulated in the first groove during the water vapor infiltration process, thereby slowing down the further penetration of water vapor into the stacked structure of the photovoltaic module, reducing the loss of electrical performance of the photovoltaic module, and extending the service life of the photovoltaic module.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] In a first aspect, the present invention provides a cover plate for use in photovoltaic modules, comprising: at least one first groove; wherein the first groove is disposed in the edge region of the upper surface of the cover plate, and the depth of the first groove is less than the thickness of the cover plate; when the cover plate is used in a photovoltaic module, the first groove is covered by at least one edge of the frame included in the photovoltaic module.

[0006] Optionally, the cover plate is a polygonal structure; at least one of the first grooves is provided for each edge region of the polygonal structure.

[0007] Optionally, the number of the first grooves provided on at least one of the edge regions is multiple, and the multiple first grooves are arranged at intervals along the length direction of the edge region.

[0008] Optionally, it further includes: at least one second groove disposed in the edge region, for one edge region: the second groove is disposed between the first groove and the first side surface of the cover plate; wherein, the first side surface is one of the plurality of sides of the cover plate located in the edge region and parallel to the length direction of the edge region.

[0009] Optionally, the number of the second grooves provided on at least one of the edge regions is multiple, and the multiple second grooves are arranged at intervals along the length direction of the edge region.

[0010] Optionally, the second groove and the first groove are staggered along the length of the edge region.

[0011] Optionally, for one of the edge regions: the extension line of the first groove near the first side of the cover plate and the extension line of the second groove away from the first side of the cover plate are on the same straight line; and / or, the second groove at least corresponds to the region between two adjacent first grooves. Optionally, it further includes: a flow guiding cavity disposed on at least one side of the first groove and / or the second groove; the flow guiding cavity has a bowl-shaped structure, and the inner surface of the flow guiding cavity communicates with the inner wall of the adjacent first groove or second groove, so as to guide water into the first groove or the second groove through the inner surface of the flow guiding cavity.

[0012] Secondly, this utility model provides a photovoltaic module, including: a module body and a frame disposed around the side of the module body; wherein the cover plate included in the module body is any of the cover plates described above.

[0013] The first aspect of the above-mentioned utility model has the following advantages or beneficial effects: by setting a first groove in the edge area of ​​the upper surface of the cover plate, water vapor can be accumulated in the first groove during the water vapor infiltration process, thereby slowing down the further penetration of water vapor into the stacked structure of the photovoltaic module, reducing the loss of electrical performance of the photovoltaic module, and extending the service life of the photovoltaic module. Attached Figure Description

[0014] The accompanying drawings are provided to better understand this utility model and do not constitute an undue limitation thereof. Wherein:

[0015] Figure 1 This is a top view of a cover plate applied to a photovoltaic module according to an embodiment of the present utility model;

[0016] Figure 2 This is a schematic diagram of the cover plate applied to a photovoltaic module according to an embodiment of the present invention;

[0017] Figure 3According to the embodiments of this utility model Figure 2 A magnified view of a portion of region A in the middle;

[0018] Figure 4 This is a schematic diagram of the water-absorbing structure according to an embodiment of the present utility model;

[0019] Figure 5 This is a schematic diagram illustrating the positional relationship between a first groove and a second groove according to an embodiment of the present utility model;

[0020] Figure 6 This is a schematic diagram illustrating another positional relationship between the first groove and the second groove according to an embodiment of the present utility model;

[0021] Figure 7 This is a schematic diagram of the specific structure of the hydrophobic layer according to an embodiment of the present utility model;

[0022] Figure 8 This is a schematic diagram of the flow guiding cavity according to an embodiment of the present utility model.

[0023] The attached figures are labeled as follows:

[0024] 1-Component body; 11-Cover plate; 111-First groove; 112-Second groove; 113-Third groove; 114-Flow guide cavity; 12-Battery array; 13-Back plate;

[0025] 2-Border;

[0026] 31-Hydrophobic layer; 311-First water-absorbing pore; 312-Hydrophobic substrate; 313-Hydrophobic adhesive layer; 32-Adhesive layer;

[0027] 4-Water-absorbing structure; 41-Water-absorbing layer; 42-Adhesive layer; 421-Second water-absorbing through hole; 43-Expansion layer. Detailed Implementation

[0028] To facilitate and clearly describe the fabrication method and the solar cell of this invention, exemplary embodiments of this invention are described below with reference to the accompanying drawings. These include various details of the embodiments to aid understanding and should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this invention. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0029] Figure 1 A top view of a cover plate for photovoltaic modules provided in an embodiment of the present invention is shown, as follows: Figure 1As shown, the cover plate for photovoltaic modules provided by this utility model includes: at least one first groove 111; wherein, the first groove 111 is disposed in the edge region of the upper surface of the cover plate 11, and the depth of the first groove 111 is less than the thickness of the cover plate 11; when the cover plate 11 is applied to a photovoltaic module, the first groove 111 is covered by at least one edge of the frame 2 included in the photovoltaic module.

[0030] The edge region refers to the area extending a certain width from the side of the cover plate 11 where it intersects with the main surface, towards the main surface. To clearly illustrate the location of the edge region, in... Figure 1 The rectangular frame indicates the location of the edge area. It should be noted that the rectangular frame does not exist in the actual cover plate structure; it is only used to illustrate the specific location of the edge area. Figure 1 The width of the rectangular frame does not represent the actual width of the edge area; the specific width of the edge area can be defined according to actual needs. Furthermore, since the cover plate 11 is the uppermost structure in the photovoltaic module, the main surface of the cover plate 11 can be understood as the front of the cover plate 11.

[0031] To clearly show the location of the first groove 111, the following is combined with... Figure 1 The structure shown is described in detail, wherein, Figure 1 This is a schematic diagram of the structure of the cover plate 11 used in a photovoltaic module, and Figure 1 and Figure 2 The example described uses a rectangular cover plate 11. Figure 1 and Figure 2 As can be seen, this utility model embodiment provides a first groove 111 on the upper surface of the cover plate 11 corresponding to the edge area covered by the frame 2. When water vapor enters the main body 1 of the photovoltaic module from the gap between the frame 2 and the cover plate 11, it will pass through the first groove 111 in advance on the intrusion path. Under the gravity of the water vapor itself, the water vapor will accumulate inside the first groove 111 and be stored in the first groove 111, thereby reducing the intrusion of water vapor into the main body 1 of the module.

[0032] In an optional embodiment, a water-absorbing material can be provided inside the first groove 111. In this way, after water vapor invades the gap between the frame 2 and the cover plate 11, the water vapor will preferentially enter the first groove 111 due to the filling of the water-absorbing material. After the water-absorbing material is saturated, the excess water vapor will further invade the interior along the gap between the frame 2 and the cover plate 11.

[0033] In one optional embodiment, the cover plate 11 has a polygonal structure; at least one first groove 111 is provided for each edge region of the polygonal structure. Preferably, the cover plate 11 can be... Figure 1The cuboid structure shown can also be configured as other polygonal structures, such as pentagonal or hexagonal structures, depending on actual needs. It can be understood that, for polygonal structures, the edge region can be specifically understood as the area where each edge of the polygon extends a certain width towards the main surface.

[0034] Regarding the specific configuration of the first groove 111, in one optional embodiment, as follows: Figure 1 As shown, at least one edge region has multiple first grooves 111, and the multiple first grooves 111 are arranged at intervals along the length direction of the edge region. Specifically, for... Figure 1 For a rectangular parallelepiped cover plate, the length direction of the edge region corresponding to the short side refers to the extension direction of the short side, and the length direction of the edge region corresponding to the long side refers to the extension direction of the long side. Similarly, the width direction of the edge region corresponding to the short side refers to the extension direction of the long side, and the width direction of the edge region corresponding to the long side refers to the extension direction of the short side. By setting the first groove 111 as a plurality of spaced-apart grooves, this utility model can protect the perimeter of the cover plate 11 as much as possible while ensuring the hardness of the edges of the glass cover plate 11.

[0035] In further optional embodiments, such as Figure 1 and Figure 2 As shown, the cover plate provided by this utility model further includes at least one second groove 112 disposed in the edge region. For one edge region, the second groove 112 is disposed between the first groove 111 and the first side surface of the cover plate 11, wherein the first side surface is the side surface of the cover plate 11 located in the edge region and parallel to the length direction of the edge region. By providing the second groove 112, moisture can be further collected based on the first groove 111, achieving a double protection effect. It is understood that absorbent material can also be provided in the second groove 112. After the absorbent material in the first groove 111 is saturated, excess moisture will be further blocked by the second groove 112 and the absorbent material in the second groove 112, thereby achieving multiple barriers on the path of moisture intrusion and further reducing the probability of moisture intrusion into the main body 1 of the component.

[0036] Similar to the arrangement of the first groove 111, in an optional embodiment, at least one edge region is provided with a plurality of second grooves 112, and the plurality of second grooves 112 are arranged at intervals along the length direction of the edge region.

[0037] In further optional embodiments, such as Figure 1As shown, the second groove 112 and the first groove 111 are staggered along the length of the edge region. The advantage of this arrangement is that, although the first groove 111 and the second groove 112 are spaced apart, their staggered distribution effectively blocks moisture from entering the entire edge region. Furthermore, due to their staggered distribution structure, the glass edges do not become brittle and easily break. It is understood that the actual structure of the first groove 111 and the second groove 112 in this invention can be the same, differing only in their placement.

[0038] To minimize or avoid areas without grooves along the moisture intrusion path in the edge region, in one optional embodiment, for an edge region: the extension line of the first groove 111 near the first side of the cover plate 11 and the extension line of the second groove 112 away from the first side of the cover plate 11 are collinear; and the second groove 112 at least corresponds to the area between two adjacent first grooves 111. Exemplarily, the positional relationship between the first groove 111 and the second groove 112 is as follows: Figure 5 As shown, where, Figure 5 The structure of only one edge region is shown; the same setup can be applied to other edge regions of the polygon structure. Figure 5 As can be seen, the above settings ensure that there are no areas without grooves along the intrusion path of water vapor in the edge region; that is, water vapor intrusion can be effectively reduced at any position along the length of the edge region. In a further optional embodiment, such as Figure 6 As shown, the distance between two adjacent first grooves 111 is the same as the length of the second groove 112. This can avoid the overlap of the first groove 111 and the second groove 112 in the direction perpendicular to the length direction of the edge area as much as possible, increase the hardness of the glass cover plate 11 as much as possible, and at the same time ensure that there is no space between the first groove 111 and the second groove 112 without grooves, thus blocking all paths for water vapor to enter the main body of the component 1.

[0039] In further optional embodiments, such as Figure 2 and Figure 8 As shown, the cover plate provided by this utility model further includes: a guide cavity 114 disposed on at least one side of the first groove 111 and / or the second groove 112; the guide cavity 114 has a bowl-shaped structure, and the inner surface of the guide cavity 114 communicates with the inner wall of the adjacent first groove 111 or second groove 112, so as to guide water into the first groove 111 or the second groove 112 through the inner surface of the guide cavity 114. Furthermore, a hydrophobic material can be coated on the inner surface of the bowl-shaped guide cavity 114 to facilitate the rapid accumulation of water vapor.

[0040] In summary, the cover plate for photovoltaic modules provided by this utility model embodiment, by setting a first groove in the edge area of ​​the upper surface of the cover plate, can achieve the accumulation of water vapor during the infiltration process, thereby slowing down the further penetration of water vapor into the stacked structure of the photovoltaic module, reducing the loss of electrical performance of the photovoltaic module, and extending the service life of the photovoltaic module.

[0041] The following is still in the format of Figure 2 The specific structure of the photovoltaic module provided by this utility model will be described using an example, such as... Figure 2 As shown, the photovoltaic module provided by this utility model includes: a module body 1 and a frame 2 disposed around the side of the module body 1; wherein, the cover plate included in the module body 1 is any of the aforementioned cover plates. From Figure 2 It can be seen that the photovoltaic module assembled based on the cover plate provided by this utility model can effectively prevent the intrusion of water vapor through the first groove 111 and the second groove 112 provided on the cover plate 11.

[0042] In practical applications, insulating adhesive is usually applied between the frame 2 and the module body 1 to seal the connection between them. Therefore, in the photovoltaic module provided by this invention, as... Figure 2 As shown, it also includes: a hydrophobic layer 31 and an adhesive layer 32 disposed between the frame 2 and the component body 1; wherein, the adhesive layer 32 is stacked on top of the hydrophobic layer 31, and the hydrophobic layer 31 covers the first groove 111. The main function of the adhesive layer 32 is to bond and fix the hydrophobic layer 31 to the frame 2, while the main function of the hydrophobic layer 31 is to seal the component body 1. Through the hydrophobic properties of its material, it promotes the downward movement of water vapor, allowing it to better accumulate in the first groove 111 and the second groove 112. It is understood that after the hydrophobic layer 31 and the adhesive layer 32 are disposed, water vapor will actually penetrate the component body 1 through the gap between the lower surface of the hydrophobic layer 31 and the upper surface of the cover plate 11. Therefore, the hydrophobic layer 31 needs to cover the first groove 111 to fully utilize the function of the first groove 111 when water vapor invades. It is evident that the hydrophobic layer 31 and the adhesive layer 32 in this invention achieve technical effects that cannot be achieved by a single layer of silicone in the prior art.

[0043] In further optional embodiments, such as Figure 2 and Figure 3 As shown, for an edge region: a third groove 113 is further provided between the second groove 112 and the first side of the cover plate 11; wherein, the first side is the side of the cover plate 11 located in the edge region and parallel to the length direction of the edge region; at least a portion of the hydrophobic layer 31 is attached to the groove wall and bottom of the third groove 113; the adhesive layer 32 is disposed through the edge region between the inner wall of the frame 2. Figure 3 yes Figure 2 A magnified view of a portion of region A in the middle. From... Figure 2 and Figure 3 As can be seen, since water vapor invades along the lower surface of the hydrophobic layer 31, by attaching at least a portion of the hydrophobic layer 31 to the wall and bottom of the third groove 113, the path of water vapor intrusion can be increased, allowing the intruded water vapor to spread along the wall and bottom of the third groove 113, thereby achieving the effect of mitigating water vapor intrusion. It is understood that, except for the portion corresponding to the third groove 113, the other portions of the hydrophobic layer 31 are the same as the adhesive layer 32, and are also disposed continuously between the edge area and the inner wall of the frame 2.

[0044] In one optional embodiment, the thickness of the cover plate 11 is 2mm to 5mm, for example, 2mm, 3mm, 4mm, 5mm, etc.; the groove depth of the first groove 111 is 0.8mm to 2mm, for example, 0.8mm, 1.2mm, 1.5mm, 2mm, etc.; the groove depth of the second groove 112 is 0.8mm to 2mm, for example, 0.8mm, 1.2mm, 1.5mm, 2mm, etc.; and the groove depth of the third groove 113 is 0.8mm to 2mm, for example, 0.8mm, 1.2mm, 1.5mm, 2mm, etc.

[0045] In one alternative embodiment, the distance between the first groove 111 and the first side of the cover plate 11 is 5.5 mm to 8.5 mm; the distance between the second groove 112 and the first side of the cover plate 11 is 2.5 mm to 7.5 mm; and the distance between the third groove 113 and the first side of the cover plate 11 is 0 mm to 4.5 mm.

[0046] In one alternative embodiment, the cross-sectional shape of the first groove 111 is at least one of a circle, a square, and a triangle; the cross-sectional shape of the second groove 112 is at least one of a circle, a square, and a triangle; and the cross-sectional shape of the third groove 113 is at least one of a circle, a square, and a triangle.

[0047] In one alternative embodiment, such as Figure 7 As shown, the hydrophobic layer 31 includes a hydrophobic substrate 312 and a hydrophobic adhesive layer 313 stacked from top to bottom. The hydrophobic adhesive layer 313 allows the hydrophobic layer 31 to be bonded to the glass cover plate 11, thereby achieving adhesion between the hydrophobic layer 31 and the edge of the cover plate 11, and between the hydrophobic layer 31 and the third groove 113. The hydrophobic substrate 312 can be made of at least one of polypropylene, trifluoroethylene, and polytetrafluoroethylene, with a thickness of 0.05mm to 1mm, such as 0.05mm, 0.2mm, 0.5mm, or 1mm. The hydrophobic adhesive layer 313 is made of at least one of butyl rubber or pressure-sensitive adhesive.

[0048] In addition, the third groove 113 can be similar to the first groove 111 and the second groove 112, also utilizing the filling material to achieve water absorption. Specifically, in an optional embodiment, the third groove 113 is further provided with a water-absorbing structure 4; the water-absorbing structure 4 is filled between the hydrophobic layer 31 and the adhesive layer 32; a first water-absorbing through hole 311 is provided on the hydrophobic layer 31 attached to the groove wall of the third groove 113; the water-absorbing structure 4 absorbs moisture through the first water-absorbing through hole 311. In a further optional embodiment, the water-absorbing structure 4 here can be different from the water-absorbing material in the first groove 111 and the second groove 112. The water-absorbing material (e.g., a sponge) can only achieve the purpose of absorbing water and will not expand after absorbing water, while the water-absorbing structure 4 needs to be selected from materials that can expand after absorbing water, such as neoprene rubber. It is understood that as moisture penetrates, it will enter the water-absorbing structure 4 inside the third groove 113 through the first water-absorbing through hole 311 provided on the hydrophobic layer 31, thereby causing the water-absorbing structure 4 to expand. After the water-absorbing structure 4 expands, it generates compressive force in the enclosed space, compressing the hydrophobic layer 31 on the bottom and walls of the third groove 113. This makes the hydrophobic layer 31 on the bottom and walls of the groove more tightly bonded to the cover plate 11, thereby further blocking the path of water vapor propagation. At the same time, the expanded water-absorbing structure 4 has elasticity and plasticity, which can effectively buffer the stress caused by the difference in thermal expansion coefficients between the frame and the cover plate 11, thereby reducing the risk of cracking of the cover plate 11 in the photovoltaic module.

[0049] It is understandable that, such as Figure 3 As shown, the third groove 113 actually has two symmetrically arranged groove walls, one close to the first side of the cover plate 11 and the other close to the second groove 112 (i.e., the first side away from the cover plate 11). The groove wall away from the side of the cover plate 11 is the preferred path for water vapor. Therefore, in an optional embodiment, the first water absorption hole 311 is located on the groove wall of the third groove 113 away from the first side of the cover plate 11.

[0050] Since the third groove 113 has a different function and structure from the first groove 111 and the second groove 112, in one optional embodiment, at least one third groove 113 is provided through the length of its corresponding edge region. Figure 1 Taking the structure shown as an example, the third groove 113 corresponding to the long side can be set to be through-hole. This is because the through-hole third groove 113 can provide protection in the width direction of the adjacent edge area, further increasing the water-blocking area of ​​the edge area. For example, when the third groove 113 is through-hole in the edge area corresponding to the length direction of the cuboid cover plate 11, the two ends of the third groove 113 actually provide protection for the edge area corresponding to the width direction of the cuboid cover plate 11, which can effectively prevent water vapor from entering from the two ends of the edge area corresponding to the width direction.

[0051] In a further optional embodiment, the water-absorbing structure 4 includes a water-absorbing layer 41, an adhesive layer 42, and an expansion layer 43 sequentially spliced ​​together in the width direction of the edge region; wherein the water-absorbing layer 41 and the expansion layer 43 are respectively adhered to both sides of the adhesive layer 42; the water-absorbing layer 41 is disposed near the first water-absorbing through-hole 311. For example, as shown... Figure 4 As shown, from right to left, the layers are a water-absorbing layer 41, an adhesive layer 42, and an expansion layer 43. Because the water-absorbing layer 41 is located close to the first water-absorbing hole 311, it can maximize the absorption of water vapor from the outside of the hydrophobic layer 31 into the water-absorbing structure 4 through the first water-absorbing hole 311.

[0052] However, since the absorbent layer 41 and the expansion layer 43 are actually bonded together by the adhesive layer 42, simply drawing moisture into the absorbent layer 41 is far from sufficient; further moisture needs to be drawn into the expansion layer 43 so that the expansion layer 43 can effectively absorb water. Therefore, in a further optional embodiment, such as... Figure 4 As shown, the adhesive layer 42 is provided with a plurality of second water-absorbing holes 421; the expansion layer 43 absorbs water from the water-absorbing layer 41 through the second water-absorbing holes 421 and expands, squeezing the hydrophobic layer 31 located on the wall and bottom of the third groove 113.

[0053] In a further optional embodiment, the first water-absorbing through-hole 311 corresponds one-to-one with the second water-absorbing through-hole 421. It is understood that when the first water-absorbing through-hole 311 corresponds one-to-one with the second water-absorbing through-hole 421, the water absorbed by the water-absorbing layer 41 can be transferred to the expansion layer 43 using the shortest path. However, the number of the first water-absorbing through-hole 311 and the second water-absorbing through-hole 421 can also be set according to actual process requirements, and this utility model does not specifically limit this.

[0054] In one alternative embodiment, such as Figure 2 As shown, the edge of the frame 2 is an arc-shaped structure that wraps around the outer edge of the adhesive layer 32, thus maximizing the structural integrity of the adhesive layer 32, preventing the adhesive layer 32 from being directly exposed to the external environment, and preventing sharp objects from piercing or cutting the adhesive layer 32.

[0055] In one alternative embodiment, such as Figure 2 As shown, a battery array 12 and a backplate 13 are stacked below the cover plate 11 of the main body 1; another edge of the frame 2 covers the edge area of ​​the backplate 13 included in the main body 1. It can be understood that there are two edges for the frame 2, one located on one side of the cover plate 11 and the other located on one side of the backplate 13.

[0056] In summary, the photovoltaic module provided by this utility model embodiment, by setting a first groove in the upper surface edge area of ​​the cover plate included in the module body, can achieve water vapor accumulation during the water vapor infiltration process, thereby slowing down the further penetration of water vapor into the stacked structure of the module body, reducing the loss of electrical performance of the photovoltaic module, and extending the service life of the photovoltaic module.

[0057] This utility model also provides the following technical solutions:

[0058] Technical Solution 1. A cover plate for photovoltaic modules, characterized in that it comprises:

[0059] At least one first groove 111; wherein,

[0060] The first groove 111 is disposed in the edge region of the upper surface of the cover plate 11, and the depth of the first groove 111 is less than the thickness of the cover plate 11;

[0061] When the cover plate 11 is applied to a photovoltaic module, the first groove 111 is covered by at least one edge of the frame 2 included in the photovoltaic module.

[0062] Technical Solution 2. The cover plate according to Technical Solution 1, characterized in that the cover plate 11 has a polygonal structure;

[0063] At least one of the first grooves 111 is provided for each edge region of the polygonal structure.

[0064] Technical Solution 3. The cover plate according to Technical Solution 1 or 2, characterized in that,

[0065] The number of the first grooves 111 provided on at least one of the edge regions is multiple.

[0066] The plurality of first grooves 111 are arranged at intervals along the length direction of the edge region.

[0067] Technical Solution 4. The cover plate according to Technical Solution 2, characterized in that it further includes: at least one second groove 112 disposed in the edge region.

[0068] For one of the aforementioned edge regions: the second groove 112 is disposed between the first groove 111 and the first side surface of the cover plate 11;

[0069] The first side is the side of the cover plate 11 located in the edge region and parallel to the length direction of the edge region among the multiple sides of the cover plate 11.

[0070] Technical Solution 5. The cover plate according to Technical Solution 4, characterized in that,

[0071] The number of the second grooves 112 provided on at least one of the edge regions is multiple, and the multiple second grooves 112 are arranged at intervals along the length direction of the edge region.

[0072] Technical Solution 6. The cover plate according to Technical Solution 5, characterized in that the second groove 112 and the first groove 111 are staggered in the length direction of the edge region.

[0073] Technical Solution 7. The cover plate according to Technical Solution 6, characterized in that,

[0074] For one of the edge regions: the extension line of the first groove 111 on the side closer to the first side of the cover plate 11 and the extension line of the second groove 112 on the side farther from the first side of the cover plate 11 are on the same straight line;

[0075] And / or,

[0076] The second groove 112 corresponds at least to the area between two adjacent first grooves 111.

[0077] Technical Solution 8. The cover plate according to Technical Solution 4, characterized in that it further comprises:

[0078] A flow guide cavity 114 is provided on at least one side of the first groove 111 and / or the second groove 112;

[0079] The flow guiding cavity 114 has a bowl-shaped structure, and the inner surface of the flow guiding cavity 114 is in communication with the inner wall of the adjacent first groove 111 or second groove 112, so as to guide water into the first groove 111 or second groove 112 through the inner surface of the flow guiding cavity 114.

[0080] Technical Solution 9. A photovoltaic module, characterized in that it comprises: a module body 1 and a frame 2 disposed around the side of the module body 1;

[0081] The cover plate included in the main body of component 1 is any one of the cover plates described in technical solutions 1 to 8.

[0082] Technical Solution 10. The photovoltaic module according to Technical Solution 9, characterized in that it further includes: a hydrophobic layer 31 and an adhesive layer 32 disposed between the frame 2 and the module body 1; wherein the adhesive layer 32 is stacked on top of the hydrophobic layer 31, and the hydrophobic layer 31 covers the first groove 111.

[0083] Technical Solution 11. The photovoltaic module according to Technical Solution 10, characterized in that,

[0084] For one of the edge regions: a third groove 113 is further provided between the second groove 112 and the first side surface of the cover plate 11; wherein, the first side surface is the side surface of the cover plate 11 located in the edge region and parallel to the length direction of the edge region among the plurality of sides of the cover plate 11.

[0085] At least a portion of the hydrophobic layer 31 is attached to the groove wall and the bottom of the third groove 113;

[0086] The adhesive layer 32 is disposed through the edge region between the inner wall of the frame 2.

[0087] Technical Solution 12. The photovoltaic module according to Technical Solution 11, characterized in that,

[0088] The third groove 113 is also provided with a water-absorbing structure 4;

[0089] The water-absorbing structure 4 is filled between the hydrophobic layer 31 and the adhesive layer 32;

[0090] A first water-absorbing through hole 311 is provided on the hydrophobic layer 31 attached to the wall of the third groove 113;

[0091] The water-absorbing structure 4 absorbs moisture through the first water-absorbing through hole 311.

[0092] Technical Solution 13. The photovoltaic module according to Technical Solution 12, characterized in that,

[0093] The first water-absorbing through hole 311 is located on the groove wall of the third groove 113 away from the first side of the cover plate 11.

[0094] Technical Solution 14. The photovoltaic module according to Technical Solution 11, characterized in that,

[0095] At least one of the third grooves 113 is provided through the length of the corresponding edge region.

[0096] Technical Solution 15. The photovoltaic module according to Technical Solution 10, characterized in that,

[0097] The hydrophobic layer 31 includes a hydrophobic substrate 312 and a hydrophobic adhesive layer 313 stacked from top to bottom.

[0098] Technical Solution 16. The photovoltaic module according to Technical Solution 12, characterized in that,

[0099] The water-absorbing structure 4 includes a water-absorbing layer 41, an adhesive layer 42, and an expansion layer 43 sequentially spliced ​​together in the width direction of the edge region; wherein the water-absorbing layer 41 and the expansion layer 43 are respectively bonded to both sides of the adhesive layer 42.

[0100] The absorbent layer 41 is positioned close to the first absorbent hole 311.

[0101] Technical Solution 17. The photovoltaic module according to Technical Solution 16, characterized in that,

[0102] The adhesive layer 42 is provided with a plurality of second water absorption holes 421;

[0103] The expansion layer 43 expands after absorbing moisture from the water-absorbing layer 41 through the second water-absorbing hole 421, which in turn compresses the hydrophobic layer 31 located on the wall and bottom of the third groove 113.

[0104] Technical Solution 18. The photovoltaic module according to Technical Solution 17, characterized in that,

[0105] The first water absorption hole 311 corresponds one-to-one with the second water absorption hole 421.

[0106] Technical Solution 19. The photovoltaic module according to Technical Solution 11, characterized in that,

[0107] The thickness of the cover plate 11 is 2mm to 5mm;

[0108] And / or,

[0109] The groove depth of the first groove 111 is 0.8mm~2mm;

[0110] And / or,

[0111] The groove depth of the second groove 112 is 0.8mm~2mm;

[0112] And / or,

[0113] The groove depth of the third groove 113 is 0.8mm~2mm.

[0114] Technical Solution 20. The photovoltaic module according to Technical Solution 11, characterized in that,

[0115] The distance between the first groove 111 and the first side surface of the cover plate 11 is 5.5 mm - 8.5 mm;

[0116] And / or,

[0117] The distance between the second groove 112 and the first side surface of the cover plate 11 is 2.5 mm to 7.5 mm;

[0118] And / or,

[0119] The distance between the third groove 113 and the first side surface of the cover plate 11 is 0 mm to 4.5 mm.

[0120] Technical Solution 21. The photovoltaic module according to Technical Solution 11, characterized in that,

[0121] The cross-sectional shape of the first groove 111 is at least one of a circle, a square, and a triangle;

[0122] And / or,

[0123] The cross-sectional shape of the second groove 112 is at least one of a circle, a square, and a triangle;

[0124] And / or,

[0125] The cross-sectional shape of the third groove 113 is at least one of a circle, a square, and a triangle.

[0126] Technical Solution 22. The photovoltaic module according to Technical Solution 9, characterized in that,

[0127] A battery array 12 and a backplate 13 are also stacked below the cover plate 11 of the main body of the component 1;

[0128] The other edge of the frame 2 covers the edge region of the back plate 13 included in the component body 1.

[0129] The above steps are provided only to help understand the structure, method, and core idea of ​​this utility model. For those skilled in the art, various improvements and modifications can be made to this utility model without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims of this utility model.

Claims

1. A cover plate for use in photovoltaic modules, characterized in that, include: At least one first groove (111); wherein, The first groove (111) is disposed in the edge region of the upper surface of the cover plate (11), and the depth of the first groove (111) is less than the thickness of the cover plate (11); When the cover plate (11) is applied to a photovoltaic module, the first groove (111) is covered by at least one edge of the frame (2) included in the photovoltaic module.

2. The cover plate according to claim 1, characterized in that, The cover plate (11) has a polygonal structure; At least one of the first grooves (111) is provided for each edge region of the polygonal structure.

3. The cover plate according to claim 1 or 2, characterized in that, The number of the first grooves (111) provided on at least one of the edge regions is multiple. The plurality of the first grooves (111) are arranged at intervals along the length direction of the edge region.

4. The cover plate according to claim 2, characterized in that, Also includes: At least one second groove (112) is provided in the edge region. For one of the edge regions: the second groove (112) is disposed between the first groove (111) and the first side of the cover plate (11); The first side is the side of the cover plate (11) located in the edge region and parallel to the length direction of the edge region among the multiple sides.

5. The cover plate according to claim 4, characterized in that, The number of the second grooves (112) provided on at least one of the edge regions is multiple. The plurality of second grooves (112) are spaced apart along the length of the edge region.

6. The cover plate according to claim 5, characterized in that, The second groove (112) and the first groove (111) are staggered along the length of the edge region.

7. The cover plate according to claim 6, characterized in that, For one of the edge regions: the extension line of the first groove (111) on the side closer to the first side of the cover plate (11) and the extension line of the second groove (112) on the side farther from the first side of the cover plate (11) are on the same straight line; And / or, The second groove (112) corresponds at least to the area between two adjacent first grooves (111).

8. The cover plate according to claim 4, characterized in that, Also includes: A flow guide cavity (114) is provided on at least one side of the first groove (111) and / or the second groove (112); The flow guiding cavity (114) has a bowl-shaped structure, and the inner surface of the flow guiding cavity (114) is connected to the inner wall of the adjacent first groove (111) or second groove (112) so as to guide water into the first groove (111) or second groove (112) through the inner surface of the flow guiding cavity (114).

9. A photovoltaic module, characterized in that, include: The main body of the component (1) and the border (2) provided around the side of the main body of the component (1); The cover plate included in the main body of the component (1) is any one of the cover plates described in claims 1 to 8.

10. The photovoltaic module according to claim 9, characterized in that, Also includes: A hydrophobic layer (31) and an adhesive layer (32) are disposed between the frame (2) and the component body (1); The adhesive layer (32) is stacked on top of the hydrophobic layer (31), and the hydrophobic layer (31) covers the first groove (111).

11. The photovoltaic module according to claim 10, characterized in that, For one of the edge regions: a third groove (113) is further provided between the second groove (112) and the first side of the cover plate (11); wherein, the first side is the side of the cover plate (11) located in the edge region and parallel to the length direction of the edge region among the plurality of sides; At least a portion of the hydrophobic layer (31) is attached to the groove wall and the bottom of the third groove (113); The adhesive layer (32) is disposed through the edge region between the inner wall of the frame (2).

12. The photovoltaic module according to claim 11, characterized in that, The third groove (113) is also provided with a water-absorbing structure (4); The water-absorbing structure (4) is filled between the hydrophobic layer (31) and the adhesive layer (32); A first water-absorbing through hole (311) is provided on the hydrophobic layer (31) attached to the wall of the third groove (113); The water-absorbing structure (4) adsorbs moisture through the first water-absorbing through hole (311).

13. The photovoltaic module according to claim 12, characterized in that, The first water-absorbing through hole (311) is located on the groove wall of the third groove (113) away from the first side of the cover plate (11).

14. The photovoltaic module according to claim 11, characterized in that, At least one of the third grooves (113) is disposed through the length of the corresponding edge region.

15. The photovoltaic module according to claim 10, characterized in that, The hydrophobic layer (31) includes a hydrophobic substrate (312) and a hydrophobic adhesive layer (313) stacked from top to bottom.

16. The photovoltaic module according to claim 12, characterized in that, The water-absorbing structure (4) includes a water-absorbing layer (41), an adhesive layer (42), and an expansion layer (43) sequentially spliced ​​together in the width direction of the edge region; wherein the water-absorbing layer (41) and the expansion layer (43) are respectively bonded to both sides of the adhesive layer (42); The absorbent layer (41) is positioned close to the first absorbent hole (311).

17. The photovoltaic module according to claim 16, characterized in that, The adhesive layer (42) is provided with a plurality of second water-absorbing through holes (421); The expansion layer (43) expands after absorbing water from the water-absorbing layer (41) through the second water-absorbing through hole (421), which in turn squeezes the hydrophobic layer (31) located on the wall and bottom of the third groove (113).

18. The photovoltaic module according to claim 17, characterized in that, The first water absorption hole (311) corresponds one-to-one with the second water absorption hole (421).

19. The photovoltaic module according to claim 11, characterized in that, The thickness of the cover plate (11) is 2mm to 5mm; And / or, The groove depth of the first groove (111) is 0.8mm to 2mm; And / or, The groove depth of the second groove (112) is 0.8mm to 2mm; And / or, The groove depth of the third groove (113) is 0.8mm to 2mm.

20. The photovoltaic module according to claim 11, characterized in that, The distance between the first groove (111) and the first side surface of the cover plate (11) is 5.5mm to 8.5mm; And / or, The distance between the second groove (112) and the first side surface of the cover plate (11) is 2.5mm to 7.5mm; And / or, The distance between the third groove (113) and the first side of the cover plate (11) is 0 mm to 4.5 mm.

21. The photovoltaic module according to claim 11, characterized in that, The cross-sectional shape of the first groove (111) is at least one of a circle, a square, and a triangle; And / or, The cross-sectional shape of the second groove (112) is at least one of a circle, a square, and a triangle; And / or, The cross-sectional shape of the third groove (113) is at least one of a circle, a square, and a triangle.

22. The photovoltaic module according to claim 9, characterized in that, A battery array (12) and a backplate (13) are also stacked below the cover plate (11) of the main body of the component (1); Another edge of the frame (2) covers the edge region of the back plate (13) included in the component body (1).

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