Photovoltaic module

Abstract

The utility model discloses a photovoltaic assembly, which is applied to the field of photovoltaic technology. According to the utility model, at least one end of the first cover plate is additionally provided with the bending part, and the creepage distance of the assembly can be increased through the internal path of the bending part, thereby improving the safety performance; and the water vapor erosion path can be increased, so that the water blocking performance is improved. And meanwhile, the second cover plate can be embedded in the clamping groove formed by the bending part, so that the second cover plate is not easy to move, the stability of the assembly during lamination can be improved, and the defects of edge layering, bubbles and the like are reduced. In addition, the bending part is additionally arranged on the side surface of the edge of the assembly for protection, so that the anti-load capacity of the edge of the assembly can be improved to a certain extent.

Description

Technical Field

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

[0002] Currently, the glass used in modules on the market is mainly in planar shape. As the cells are continuously improved and enlarged, the creepage distance of the modules is getting closer and closer to the limit, and the safety hazards are also increasing. Therefore, it is necessary to increase the creepage distance of the modules. At the same time, enhancing the water resistance performance of the modules, enhancing the stability of the modules during lamination, and enhancing the load resistance of the module edges are also important future development directions. Therefore, higher requirements are placed on the encapsulation of the modules. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a photovoltaic module that simultaneously increases the creepage distance of the module, enhances the water resistance of the module, enhances the stability of the module during lamination, and enhances the load resistance of the module edges.

[0004] To solve the above-mentioned technical problems, this utility model provides a photovoltaic module, including: a first cover plate, a second cover plate, a cell layer, and an encapsulating film; the cell layer is disposed between the first cover plate and the second cover plate; the encapsulating film is disposed between the first cover plate and the cell layer, and between the second cover plate and the cell layer;

[0005] The first cover plate includes a main body, and at least one end of the main body is provided with a bent portion; the bent portion is bent toward the surface of the main body to form a groove; at least one end of the second cover plate is embedded in the groove.

[0006] Optionally, the bent portion provided at one end of the main body includes a first bent portion and a second bent portion;

[0007] One end of the first bend is connected to one end of the main body, and the other end of the first bend extends along a first direction; the first direction is a direction perpendicular to the surface of the main body.

[0008] One end of the second bend is connected to the other end of the first bend, and the other end of the second bend extends along a second direction; the second direction is a direction parallel to the surface of the main body.

[0009] One end of the second cover plate is disposed on the surface of the second bend.

[0010] Optionally, the bent portions are provided at both ends of the main body portion;

[0011] The bending portion provided at the other end of the main body includes a first bending portion and a second bending portion; the two ends of the second cover plate are respectively provided on the surfaces of the two second bending portions;

[0012] Alternatively, the bent portion provided at the other end of the main body may include the first bent portion.

[0013] Optionally, the difference between the distance between the two first bends and the length of the second cover plate along the second direction is 9mm-13mm, including the values ​​at both ends.

[0014] Optionally, the thickness of the first bent portion along the second direction is 3mm-6mm, including the values ​​at both ends;

[0015] And / or, the height of the first bend along the first direction is 4mm-9mm, including the values ​​at both ends.

[0016] Optionally, the length of the second bend along the second direction is 9mm-13mm, including the values ​​at both ends.

[0017] Optionally, the distance between the second bend and the second cover plate is 0-2mm, including the values ​​at both ends.

[0018] Optionally, the battery cell layer includes multiple battery strings; the battery strings include multiple battery cells; the battery strings are arranged sequentially along a second direction and extend along a third direction; both the second direction and the third direction are parallel to the surface of the main body, and the third direction is perpendicular to the second direction;

[0019] The main body is provided with the bent portion at at least one end along the second direction, and the bent portion extends along the third direction.

[0020] Optionally, the adhesive film is provided on the side surface of the bent portion facing the card slot.

[0021] Optionally, the bent portion may have a pattern on the side facing the slot.

[0022] As can be seen, the photovoltaic module provided by this utility model has a bent portion added to at least one end of the first cover plate. The internal path of the bent portion increases the creepage distance of the module, thereby improving safety performance; it also increases the path for water vapor erosion, thereby improving water resistance. Simultaneously, the second cover plate can be embedded in the groove formed by the bent portion, making it less prone to movement and increasing the stability of the module during lamination, reducing defects such as edge delamination and bubbles. Furthermore, the addition of a bent portion for protection on the side edges of the module can improve the load-bearing capacity of the module edges to a certain extent. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 An exploded view of a photovoltaic module provided for an embodiment of this utility model;

[0025] Figure 2 A partial structural diagram of a photovoltaic module provided in an embodiment of this utility model;

[0026] Figure 3 A top view of a photovoltaic module provided for an embodiment of this utility model.

[0027] The annotations in the attached figures are explained as follows:

[0028] 1-First cover plate; 11-Main body; 12-Bending part; 121-First bending part; 122-Second bending part; 2-Second cover plate; 3-Battery cell layer; 31-Battery cell; 4-Film. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] Please refer to Figure 1 , Figure 1 An exploded view of a photovoltaic module provided in an embodiment of this utility model. The photovoltaic module may include: a first cover plate 1, a second cover plate 2, a cell layer 3, and an encapsulating film 4; the cell layer 3 is disposed between the first cover plate 1 and the second cover plate 2; the encapsulating film 4 is disposed between the first cover plate 1 and the cell layer 3, and between the second cover plate 2 and the cell layer 3;

[0031] The first cover plate 1 includes a main body 11, and at least one end of the main body 11 is provided with a bent portion 12; the bent portion 12 is bent toward the same side surface of the main body 11 to form a groove; at least one end of the second cover plate 2 is embedded in the groove.

[0032] In this embodiment, the first cover plate 1 can be a front cover plate, and the corresponding second cover plate 2 can be a back cover plate; in this embodiment, the first cover plate 1 can also be a back cover plate, and the corresponding second cover plate 2 can be a front cover plate.

[0033] This embodiment does not limit the specific type of the first cover plate 1, which may include, but is not limited to, a glass cover plate. Similarly, this embodiment does not limit the specific type of the second cover plate 2, which may include, but is not limited to, a glass cover plate. It should be noted that glass is a common material in the prior art, and this embodiment does not limit the internal composition of the first cover plate 1 and the second cover plate 2, but directly uses glass cover plates made of existing materials.

[0034] Furthermore, such as Figure 2 As shown, in this embodiment, an adhesive film 4 can be provided on the side surface of the bent portion 12 facing the slot. It should be noted that in this embodiment, the adhesive film 4 is essentially provided between the laminated structure consisting of the adhesive film 4, the battery cell layer 3, the adhesive film 4, and the second cover plate 2 and the bent portion 12, as well as between the side surface of the bent portion 12 and the second cover plate 2 facing away from the first cover plate 1. By filling the above gaps with the adhesive film 4, water vapor erosion can be blocked, thereby improving the water-blocking performance.

[0035] Furthermore, such as Figure 2 As shown, in this embodiment, the side of the bent portion 12 facing the slot may be provided with a pattern. It should be noted that in this embodiment, providing a pattern on the inner side of the bent portion 12 can enhance the adhesion with the adhesive film 4.

[0036] In this embodiment, a bend 12 may be provided at either end of the main body 11; or, bends 12 may be provided at both ends of the main body 11. It should be noted that in this embodiment, the former main body 11 has a bend at only one end. This bend can increase the creepage distance of the component through its internal path, thereby improving safety performance; it also increases the path for moisture erosion, thereby improving water resistance; simultaneously, the addition of a bend for protection on one side edge of the component can improve the load-bearing capacity of that edge to a certain extent. Furthermore, having a slot at one end and no slot at the other allows one end of the second cover plate to be embedded in the slot, making it less prone to movement and increasing the stability of the component during lamination, reducing defects such as edge delamination and bubbles; on the other hand, the absence of a slot makes installation easier.

[0037] This embodiment does not limit the specific structure of the bent portion 12 provided at one end of the main body 11, and may include, but is not limited to, such as Figure 2As shown, the bent portion 12 provided at one end of the main body 11 includes a first bent portion 121 and a second bent portion 122; one end of the first bent portion 121 is connected to one end of the main body 11, and the other end of the first bent portion 121 extends along a first direction; the first direction is a direction perpendicular to the surface of the main body 11; one end of the second bent portion 122 is connected to the other end of the first bent portion 121, and the other end of the second bent portion 122 extends along a second direction; the second direction is a direction parallel to the surface of the main body 11; one end of the second cover plate 2 is disposed on the surface of the second bent portion 122. It should be noted that, in this embodiment... Figure 2 The bent portion 12 shown is an L-shaped irregular structure.

[0038] When both ends of the main body 11 are provided with bent portions 12, the structures of the bent portions 12 at both ends of the main body 11 in this embodiment can be the same or different. For example, the bent portion at the other end of the main body may include the first bent portion and the second bent portion; the two ends of the second cover plate are respectively provided on the surfaces of the two second bent portions; or, the bent portion at the other end of the main body may include the first bent portion. It should be noted that in this embodiment, the former is provided with L-shaped bent portions at both ends; the latter is provided with an L-shaped bent portion at one end and an I-shaped bent portion at the other end. Among them, the L-shaped bent portion has a longer internal path than the I-shaped bent portion, which increases the creepage distance of the component and improves the safety performance; the increased moisture erosion path is longer, which improves the water resistance performance; and the component edge load resistance is improved. In addition, the former can embed the two ends of the second cover plate into the grooves formed by the bent portion, making it less prone to movement, which can increase the stability of the component during lamination and reduce defects such as edge delamination and bubbles. The latter has an I-shaped slot at one end, which is easier to lay because there is no second bend to block it.

[0039] This embodiment does not limit the specific value of the difference L1 between the distance between the two first bending portions 121 and the length of the second cover plate 2 along the second direction. For example, the difference L1 between the distance between the two first bending portions 121 and the length of the second cover plate 2 along the second direction can be 9mm-13mm, including the values ​​at both ends. It should be noted that the above parameter range is used in this embodiment to ensure that there is enough space between the two slots to embed the second cover plate 2.

[0040] This embodiment does not limit the specific value of the thickness L2 of the first bending portion 121 along the second direction. For example, the thickness L2 of the first bending portion 121 along the second direction can be 3mm-6mm, including the values ​​at both ends. It should be noted that using the above parameter range in this embodiment can enhance the mechanical strength of the bending portion 12, thereby enhancing the load-bearing capacity of the component edge.

[0041] This embodiment does not limit the specific value of the height L3 of the first bending portion 121 along the first direction. For example, the height L3 of the first bending portion 121 along the first direction can be 4mm-9mm, including the values ​​at both ends. It should be noted that the above parameter range is used in this embodiment to ensure that there is enough space in the slot to embed the second cover plate 2, the battery cell layer 3 and the pre-set weight adhesive film 4.

[0042] This embodiment does not limit the specific value of the length L4 of the second bend 122 along the second direction. For example, the length L4 of the second bend 122 along the second direction can be 9mm-13mm, including the values ​​at both ends. It should be noted that using the above parameter range in this embodiment can increase the path of water vapor erosion, thereby improving the water-blocking performance.

[0043] This embodiment does not limit the specific value of the distance L6 between the second bent portion 122 and the second cover plate 2. For example, the distance L6 between the second bent portion 122 and the second cover plate 2 can be 0-2mm, including the values ​​at both ends. It should be noted that when the adhesive film 4 is filled between the second bent portion 122 and the second cover plate in this embodiment, the distance between the second bent portion 122 and the second cover plate 2 determines the thickness of the adhesive film 4. The thicker the adhesive film 4, the stronger its adhesion.

[0044] This embodiment does not limit the specific location of the bent portion 12, and may include, but is not limited to, the following: Figure 3 As shown, the cell layer 3 includes multiple cell strings; each cell string includes multiple cells 31; the cell strings are arranged sequentially along a second direction and extend along a third direction; both the second and third directions are parallel to the surface of the main body 11, and the third direction is perpendicular to the second direction; at least one end of the main body 11 along the second direction is provided with a bending portion 12, which extends along the third direction. It should be noted that in traditional photovoltaic modules, the cells 31 of the cell layer 3 are typically arranged in a rectangular array. In the length direction, the distance from the cell 31 to the edge of the first cover plate 1 is relatively large, resulting in a larger creepage distance. However, in the width direction, the distance from the cell 31 to the edge of the first cover plate 1 is relatively small, resulting in a smaller creepage distance. Therefore, it is necessary to increase the creepage distance in the width direction. In this embodiment, the bending portion 12 is essentially located on the long side of the main body 11, thus increasing the creepage distance in the width direction.

[0045] Based on the above embodiments, this utility model adds a bend at at least one end of the first cover plate. The internal path of the bend increases the creepage distance of the component, thereby improving safety performance; it also increases the path for moisture erosion, thereby improving water resistance. Simultaneously, the second cover plate can be embedded in the groove formed by the bend, making it less prone to movement and increasing the stability of the component during lamination, reducing defects such as edge delamination and bubbles. Furthermore, since the bend is added to the side of the component edge for protection, the load-bearing capacity of the component edge can be improved to a certain extent.

[0046] To make this utility model easier to understand, the embodiments of this utility model provide a Figure 1 The method for manufacturing the photovoltaic module shown includes:

[0047] In this embodiment, the photovoltaic module is a double-glass module. The first cover plate 1 is the front glass, and the second cover plate 2 is the back glass. Compared with the traditional double-glass module, the width of the front glass remains unchanged, while the width of the back glass should be reduced by (10-12) ±1 mm. In the manufacturing process of photovoltaic tempered glass, the glass is produced by calendering. The temperature of the glass strip coming out of the calender is about 850℃-900℃. The front glass strip is then sent to a customized irregular-shaped glass forming machine, where an irregular structure is added to the long side of the front glass. The irregular structure has a pattern on the inside and the angle is set to a right angle. After forming, it becomes an irregular-shaped glass. In the irregular structure, the thickness L2 of the first bent portion 121 along the second direction is (4-5) ±1 mm, the height L3 of the first bent portion 121 along the first direction is (5-8) ±1 mm, the length L4 of the second bent portion 122 along the second direction is (10-12) ±1 mm, and the distance L6 between the second bent portion 122 and the second cover plate 2 is 1 ±1 mm. The pattern on the inner side of the irregular structure enhances adhesion to the adhesive film 4. During the module manufacturing process, the back glass needs to be embedded from the irregular structure of the front glass during installation. Other installation processes are the same as those for traditional double-glass modules. During lamination, the irregular structure makes the back glass less prone to movement, increasing module stability and reducing defects such as edge delamination and bubbles. Appropriately increasing the amount of adhesive film 4, or its weight, allows the adhesive film 4 to fill the glass gaps during lamination, thereby increasing the water vapor erosion path and enhancing water resistance. Due to the special structure of irregularly shaped glass, the laminated module has an additional glass layer at the edge, which can improve the load-bearing capacity of the module edge to a certain extent.

[0048] The photovoltaic module provided by this utility model has been described in detail above. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​the embodiments of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A photovoltaic module, characterized by, The utility model relates to a solar cell module, including: First cover plate, second cover plate, battery piece layer and adhesive film; The battery piece layer is arranged between the first cover plate and the second cover plate, and the adhesive film is arranged between the first cover plate and the battery piece layer and between the second cover plate and the battery piece layer; The first cover plate includes a main body part, at least one end of the main body part is provided with a bending part, the bending part is bent to form a clamping groove on the surface of the main body part, and at least one end of the second cover plate is embedded in the clamping groove.

2. The photovoltaic module of claim 1, wherein, The bending part provided at one end of the main body part includes a first bending part and a second bending part; One end of the first bending part is connected with one end of the main body part, and the other end of the first bending part extends in a first direction; the first direction is a direction perpendicular to the surface of the main body part; One end of the second bending part is connected with the other end of the first bending part, and the other end of the second bending part extends in a second direction; the second direction is a direction parallel to the surface of the main body part; One end of the second cover plate is arranged on the surface of the second bending part.

3. The photovoltaic module of claim 2, wherein, Both ends of the main body part are provided with the bending part; The bending part provided at the other end of the main body part includes the first bending part and the second bending part, and both ends of the second cover plate are arranged on the surfaces of the two second bending parts respectively; Or, the bending part provided at the other end of the main body part includes the first bending part.

4. The photovoltaic module of claim 3, wherein, The difference between the interval of the two first bending parts and the length of the second cover plate in the second direction is 9mm-13mm, and the values at both ends are included.

5. The photovoltaic module of claim 2, wherein, The thickness of the first bending part in the second direction is 3mm-6mm, and the values at both ends are included; And / or, the height of the first bending part in the first direction is 4mm-9mm, and the values at both ends are included.

6. The photovoltaic module of claim 2, wherein, The length of the second bending part in the second direction is 9mm-13mm, and the values at both ends are included.

7. The photovoltaic module of claim 2, wherein, The interval between the second bending part and the second cover plate is 0-2mm, and the values at both ends are included.

8. The photovoltaic module of claim 1, wherein, The battery piece layer includes a plurality of battery strings; the battery string includes a plurality of battery pieces; the battery strings are arranged in sequence in a second direction and extend in a third direction; the second direction and the third direction are both directions parallel to the surface of the main body part, and the third direction is perpendicular to the second direction; At least one end of the main body part in the second direction is provided with the bending part, and the bending part extends in the third direction.

9. The photovoltaic module according to any of claims 1 to 8, characterized in that The side surface of the bending part facing the clamping groove is provided with the adhesive film.

10. The photovoltaic module of claim 9, wherein, The side of the bending part facing the clamping groove is provided with a pattern.

Images