High-temperature cloth and laminating device

Abstract

The utility model relates to high-temperature cloth and a laminating device. The high-temperature cloth comprises a middle part, a first edge, a first connecting part, a second edge and a second connecting part. The first edge part is arranged on the first side of the middle part, the middle part is thicker than the first edge part, the first connecting part is arranged between the first side of the middle part and the first edge part, and the first connecting part is connected with the first side of the middle part and the first edge part. The second edge part is arranged on the second side of the middle part, the middle part is thicker than the second edge part, the second connecting part is arranged between the second side of the middle part and the second edge part, and the second connecting part is connected with the second side of the middle part and the second edge part. As the middle part of the high-temperature cloth is thickened, the middle part of the high-temperature cloth can play a role in heat insulation, and also can play a better role in buffering, thereby reducing the heating warping amplitude of the edges and four corners of the front cover plate and the back cover plate of the photovoltaic module, ensuring that the temperature of the position of the middle hole of the photovoltaic module is uniform, and improving the reliability of the photovoltaic module. The problem of hole position cracking of the photovoltaic module is solved.

Description

Technical Field

[0001] This application relates to the field of photovoltaic module technology, and in particular to a high-temperature cloth and lamination device. Background Technology

[0002] During the lamination process of photovoltaic modules, a front cover plate needs to be covered on the light-receiving side of the solar cell, and a back cover plate needs to be covered on the back side of the solar cell. Specifically, encapsulating films are first laid on the front cover plate and the back cover plate respectively. Then, the front cover plate with the encapsulating film is placed on the light-receiving side of the solar cell, and the back cover plate with the encapsulating film is placed on the back side of the solar cell.

[0003] However, as the size of photovoltaic modules increases and the manufacturing cost decreases, the thickness and weight of the encapsulating film gradually decrease. During the high-temperature lamination process of photovoltaic modules, the four corners and edges of the front cover and back cover will warp, resulting in uneven temperature at the location of the central holes in the photovoltaic module. This leads to more cracks in the holes of the photovoltaic module, affecting the yield of the photovoltaic module. Utility Model Content

[0004] Therefore, it is necessary to provide a high-temperature cloth and lamination device to solve the problem of cracked pores in photovoltaic modules and ensure the yield rate of photovoltaic modules.

[0005] In a first aspect, this application also provides a high-temperature fabric, comprising:

[0006] The middle portion is used to contact the surface of the photovoltaic module, and the middle portion has opposing first and second sides;

[0007] A first edge portion and a first connecting portion, wherein the first edge portion is disposed on a first side of the middle portion, the thickness of the middle portion is greater than the thickness of the first edge portion, and the first connecting portion is disposed between the first side of the middle portion and the first edge portion, and the first connecting portion connects the first side of the middle portion and the first edge portion;

[0008] The second edge portion and the second connecting portion are disposed on the second side of the middle portion, the thickness of the middle portion is greater than the thickness of the second edge portion, and the second connecting portion is disposed between the second side of the middle portion and the second edge portion, and the second connecting portion connects the second side of the middle portion and the second edge portion.

[0009] In one embodiment, the thickness of the first connecting portion near the first edge is equal to the thickness of the first edge, the thickness of the first connecting portion near the middle is equal to the thickness of the middle, and the thickness of the first connecting portion gradually increases in the direction from the first edge to the middle.

[0010] In one embodiment, the thickness of the second connecting portion near the second edge is equal to the thickness of the second edge, the thickness of the second connecting portion near the middle is equal to the thickness of the middle, and the thickness of the second connecting portion gradually increases in the direction from the second edge to the middle.

[0011] In one embodiment, the middle portion, the first edge portion, the first connecting portion, the second edge portion, and the second connecting portion each have a first surface and a second surface, with the first surface and the second surface disposed opposite to each other; the first surface of the middle portion, the first surface of the first edge portion, the first surface of the first connecting portion, the first surface of the second edge portion, and the first surface of the second connecting portion are located on the same plane; the second surface of the middle portion is higher than the second surface of the first edge portion and the second surface of the second edge portion; the second surface of the first connecting portion is obliquely disposed between the second surface of the middle portion and the second surface of the first edge portion; and the second surface of the second connecting portion is obliquely disposed between the second surface of the middle portion and the second surface of the second edge portion.

[0012] In one embodiment, the thickness of the middle portion is 0.75 mm to 0.85 mm.

[0013] In one embodiment, the thickness of the middle portion is uniform.

[0014] In one embodiment, the thickness of the first edge portion is 0.3 mm to 0.4 mm, and the thickness of the second edge portion is 0.3 mm to 0.4 mm.

[0015] In one embodiment, the thickness of the first edge portion and the second edge portion are uniform, and the thickness of the first edge portion is equal to the thickness of the second edge portion.

[0016] In one embodiment, the high-temperature cloth is polytetrafluoroethylene glass fiber cloth.

[0017] Secondly, this application also provides a lamination apparatus, comprising:

[0018] The support mechanism is used to support the photovoltaic module;

[0019] A pressurizing mechanism, disposed opposite to the bearing mechanism, is used to apply pressure to the photovoltaic module; and

[0020] The high-temperature fabric of any of the above is disposed on the supporting mechanism.

[0021] In the aforementioned high-temperature cloth and lamination device, the photovoltaic module is located in the middle of the high-temperature cloth during the photovoltaic module lamination process. Due to the thickened middle section of the high-temperature cloth, it provides better heat insulation and cushioning, reducing the warping of the edges and corners of the front and back cover plates of the photovoltaic module caused by heat. This ensures uniform temperature at the central aperture locations of the photovoltaic module, resolving the issue of aperture cracking and guaranteeing a high yield rate. Furthermore, the thickened middle section of the high-temperature cloth allows for the setting of more lamination parameters in the lamination device, such as expanding the range of lamination temperature, pressure, and time. This enables the lamination device to adapt to both low-temperature and high-temperature lamination processes. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a high-temperature cloth according to an embodiment of this application.

[0023] Figure 2 for Figure 1 The diagram shows a partial cross-sectional view of the high-temperature fabric.

[0024] Figure 3 This is a simplified structural diagram of a lamination apparatus according to an embodiment of this application.

[0025] Explanation of icon numbers:

[0026] 10. High-temperature fabric; 11. Middle part; 111. First side; 112. Second side; 12. First edge part; 13. First connecting part; 14. Second edge part; 15. Second connecting part; 20. Bearing mechanism; 30. Pressurizing mechanism. Detailed Implementation

[0027] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0028] See Figure 3 One embodiment of this application provides a lamination apparatus including a support mechanism 20 and a pressurizing mechanism 30. The support mechanism 20 is used to support photovoltaic modules, and the support mechanism 20 and the pressurizing mechanism 30 are arranged opposite to each other.

[0029] During the lamination process of photovoltaic modules, a front cover plate needs to be covered on the light-receiving side of the solar cell, and a back cover plate needs to be covered on the back side of the solar cell. Specifically, encapsulating films are first laid on the front and back cover plates respectively. Then, the front cover plate with the encapsulating film is placed on the light-receiving side of the solar cell, and the back cover plate with the encapsulating film is placed on the back side of the solar cell. Next, the pressurizing mechanism 30 moves towards the support mechanism 20, so that the pressurizing mechanism 30 and the support mechanism 20 form a lamination cavity, and the photovoltaic module is located in the lamination cavity. The pressurizing mechanism 30 performs hot pressing on the photovoltaic module, causing the encapsulating films to melt. After the encapsulating film between the front cover plate and the solar cell melts, it bonds the front cover plate to the light-receiving side of the solar cell. After the encapsulating film between the back cover plate and the solar cell melts, it bonds the back cover plate to the back side of the solar cell.

[0030] During the lamination process of photovoltaic modules, air bubbles are easily generated after the encapsulating film melts. Therefore, the bearing mechanism 20 and / or the pressurizing mechanism 30 are provided with air extraction holes that communicate with the lamination chamber. The air extraction holes are connected to the vacuum pumping component, which is used to evacuate the lamination chamber to remove air bubbles in the photovoltaic module and improve the quality of the photovoltaic module.

[0031] As photovoltaic (PV) module sizes increase and production costs decrease, the thickness and weight of the encapsulating film gradually decrease. During the high-temperature lamination process, the corners and edges of the front and back cover plates of the PV module warp, leading to uneven temperature distribution at the central aperture locations. This results in more cracks at these aperture locations, affecting the overall yield of the PV module. Therefore, please refer to... Figure 1 and Figure 3 This application provides a high-temperature fabric 10, which is disposed on a supporting mechanism 20. The high-temperature fabric 10 includes a central portion 11, a first edge portion 12, a first connecting portion 13, a second edge portion 14, and a second connecting portion 15. The central portion 11 is used for contact with the surface of a photovoltaic module. The central portion 11 has a first side 111 and a second side 112, which are disposed opposite to each other. The first edge portion 12 is disposed on the first side 111 of the central portion 11, and the thickness of the central portion 11 is greater than the thickness of the first edge portion 12. The first connecting portion 13 is disposed between the first side 111 and the first edge portion 12 of the central portion 11, connecting the first side 111 and the first edge portion 12 of the central portion 11. The second edge portion 14 is disposed on the second side 112 of the central portion 11, and the thickness of the central portion 11 is greater than the thickness of the second edge portion 14. The second connecting portion 15 is provided between the second side 112 of the middle portion 11 and the second edge portion 14, and the second connecting portion 15 connects the second side 112 of the middle portion 11 and the second edge portion 14.

[0032] It is understandable that the middle part 11 of the high-temperature cloth 10 is thickened, while the first edge part 12 and the second edge part 14 are thinned, so that the thickness of the middle part 11 is greater than the thickness of the first edge part 12 and the second edge part 14.

[0033] During the photovoltaic module lamination process, the photovoltaic module is located in the middle 11 of the high-temperature cloth 10. Due to the thickening treatment of the middle 11 of the high-temperature cloth 10, the middle 11 of the high-temperature cloth 10 can better perform the heat insulation effect, and at the same time, it can also better perform the buffering effect, reducing the degree of heat warping of the edges and four corners of the front cover plate and the back cover plate of the photovoltaic module. This makes the temperature uniform at the location of the hole in the middle of the photovoltaic module, solves the problem of cracking at the hole of the photovoltaic module, and ensures the yield of the photovoltaic module.

[0034] Because the middle part 11 of the high-temperature fabric 10 is thickened, the laminating device can be set with more laminating parameters, such as expanding the range of parameters such as laminating temperature, laminating pressure and laminating time, so that the laminating device can not only adapt to low-temperature laminating processes, but also high-temperature laminating processes.

[0035] During the photovoltaic module lamination process, the pressure mechanism 30 presses against the first edge portion 12 and the second edge portion 14 on both sides, respectively. The first edge portion 12 and the second edge portion 14 extend from the edge of the lamination chamber to the outside of the lamination chamber. Due to the thinning treatment of the first edge portion 12 and the second edge portion 14, the sealing of the lamination chamber can be guaranteed, the vacuuming effect can be guaranteed, and it is beneficial to better remove air bubbles inside the photovoltaic module.

[0036] In one embodiment, see Figure 2 The thickness of the middle part 11 is 0.75mm to 0.85mm. The thickness of the middle part 11 is represented by δ1.

[0037] Optionally, the thickness of the middle part 11 can be 0.75mm, 0.76mm, 0.77mm, 0.78mm, 0.79mm, 0.80mm, 0.81mm, 0.82mm, 0.83mm, 0.84mm and 0.85mm.

[0038] In one embodiment, see Figure 2 The thickness of the central section 11 is uniform. This means that the thickness of the central section 11 is equal at any point. During the photovoltaic module lamination process, the uniform thickness of the central section 11 ensures uniform temperature at the locations of the central holes in the photovoltaic module, resolving the issue of hole cracking and guaranteeing the yield rate of the photovoltaic modules.

[0039] In one embodiment, see Figure 2The thickness of the first edge portion 12 is 0.3 mm to 0.4 mm, and the thickness of the second edge portion 14 is 0.3 mm to 0.4 mm. δ2 is used to represent the thickness of the first edge portion 12.

[0040] Optionally, the thickness of the first edge portion 12 and the second edge portion 14 may be 0.3mm, 0.31mm, 0.32mm, 0.33mm, 0.34mm, 0.35mm, 0.36mm, 0.37mm, 0.38mm, 0.39mm and 0.4mm.

[0041] In one embodiment, the thickness of the first edge portion 12 and the second edge portion 14 is uniform. It is understood that the thickness of the first edge portion 12 is equal at any location, and the thickness of the second edge portion 14 is equal at any location.

[0042] Optionally, the thickness of the first edge portion 12 is equal to the thickness of the second edge portion 14. Optionally, the thickness of the first edge portion 12 and the second edge portion 14 is 0.35 mm. This ensures the sealing of the lamination cavity, guarantees the vacuuming effect, and facilitates better removal of air bubbles within the photovoltaic module.

[0043] In one embodiment, see Figure 2 The thickness of the first connecting portion 13 near the first edge portion 12 is equal to the thickness of the first edge portion 12, and the thickness of the first connecting portion 13 near the center portion 11 is equal to the thickness of the center portion 11. The thickness of the first connecting portion 13 gradually increases in the direction from the first edge portion 12 to the first side 111 of the center portion 11. Optionally, the thickness of the first connecting portion 13 is 0.35 mm, and the thickness of the center portion 11 is 0.79 mm, with the thickness of the first connecting portion 13 gradually increasing from 0.35 mm to 0.79 mm in the direction from the first edge portion 12 to the first side 111 of the center portion 11. Thus, the first connecting portion 13 serves as a transition, making the thickness of the center portion 11 greater than the thickness of the first edge portion 12.

[0044] In one embodiment, the thickness of the second connecting portion 15 near the second edge portion 14 is equal to the thickness of the second edge portion 14, and the thickness of the second connecting portion 15 near the center portion 11 is equal to the thickness of the center portion 11. The thickness of the second connecting portion 15 gradually increases in the direction from the second edge portion 14 to the center portion 11. Optionally, the thickness of the second edge portion 14 is 0.35 mm, and the thickness of the second connecting portion 15 gradually increases from 0.35 mm to 0.79 mm in the direction from the second edge portion 14 to the second side 112 of the center portion 11. Thus, the second connecting portion 15 serves as a transition, making the thickness of the center portion 11 greater than the thickness of the second edge portion 14.

[0045] Specifically, see Figure 2The middle portion 11, the first edge portion 12, the first connecting portion 13, the second edge portion 14, and the second connecting portion 15 each have a first surface and a second surface, which are disposed opposite to each other. The first surface of the middle portion 11, the first surface of the first edge portion 12, the first surface of the first connecting portion 13, the first surface of the second edge portion 14, and the first surface of the second connecting portion 15 are located on the same plane. The second surface of the middle portion 11 is higher than the second surface of the first edge portion 12 and the second surface of the second edge portion 14. The second surface of the first connecting portion 13 is inclinedly disposed between the second surface of the middle portion 11 and the second surface of the first edge portion 12, and the second surface of the second connecting portion 15 is inclinedly disposed between the second surface of the middle portion 11 and the second surface of the second edge portion 14.

[0046] In one embodiment, see Figure 1 The length of the high-temperature fabric 10 is the sum of the lengths of the middle portion 11, the first edge portion 12, the first connecting portion 13, the second edge portion 14, and the second connecting portion 15. Specifically, L = L1 + L2 + L3 + L4 + L5, where L represents the length of the high-temperature fabric 10, L1 represents the length of the middle portion 11, L2 represents the length of the first edge portion 12, L3 represents the length of the second edge portion 14, L4 represents the length of the first connecting portion 13, and L5 represents the length of the second connecting portion 15.

[0047] It should be noted that L1, L2, L3, L4, and L5 can be set according to actual needs. Optionally, L1 is 8520mm, L2 is 862mm, L3 is 862mm, L4 is 50mm, and L5 is 50mm.

[0048] In one embodiment, see Figure 1 The widths of the middle portion 11, the first edge portion 12, the first connecting portion 13, the second edge portion 14, and the second connecting portion 15 are equal. It can be understood that the widths of the middle portion 11, the first edge portion 12, the first connecting portion 13, the second edge portion 14, and the second connecting portion 15 are equal to the width of the high-temperature fabric 10. The width of the high-temperature fabric 10 is represented by W.

[0049] It should be noted that W can be set according to actual needs. Optionally, W is 2700mm.

[0050] In one embodiment, the high-temperature cloth 10 is a polytetrafluoroethylene (PTFE) fiberglass cloth. The PTFE fiberglass cloth is made by impregnating high-performance alkali-free fiberglass cloth with a suspended PTFE emulsion. The PTFE fiberglass cloth can be used at temperatures ranging from -196°C to 300°C, and it is not easily deformed during lamination. The PTFE fiberglass cloth has low surface tension and does not easily adhere to any substances.

[0051] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0052] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0053] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0054] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0055] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0056] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A high-temperature fabric (10), characterized in that, include: The middle part (11) is used to contact the surface of the photovoltaic module, and the middle part (11) has a first side (111) and a second side (112) opposite each other. A first edge portion (12) and a first connecting portion (13) are provided on the first side (111) of the middle portion (11), the thickness of the middle portion (11) is greater than the thickness of the first edge portion (12), and the first connecting portion (13) is provided between the first side (111) of the middle portion (11) and the first edge portion (12), and the first connecting portion (13) connects the first side (111) of the middle portion (11) and the first edge portion (12). The second edge portion (14) and the second connecting portion (15) are provided on the second side (112) of the middle portion (11), the thickness of the middle portion (11) is greater than the thickness of the second edge portion (14), the second connecting portion (15) is provided between the second side (112) of the middle portion (11) and the second edge portion (14), and the second connecting portion (15) connects the second side (112) of the middle portion (11) and the second edge portion (14).

2. The high-temperature fabric (10) according to claim 1, characterized in that, The thickness of the first connecting portion (13) on the side near the first edge portion (12) is equal to the thickness of the first edge portion (12), and the thickness of the first connecting portion (13) on the side near the middle portion (11) is equal to the thickness of the middle portion (11). In the direction from the first edge portion (12) to the first side (111) of the middle portion (11), the thickness of the first connecting portion (13) gradually increases.

3. The high-temperature fabric (10) according to claim 1, characterized in that, The thickness of the second connecting portion (15) on the side near the second edge portion (14) is equal to the thickness of the second edge portion (14), and the thickness of the second connecting portion (15) on the side near the middle portion (11) is equal to the thickness of the middle portion (11). In the direction from the second edge portion (14) to the middle portion (11), the thickness of the second connecting portion (15) gradually increases.

4. The high-temperature fabric (10) according to claim 1, characterized in that, The middle portion (11), the first edge portion (12), the first connecting portion (13), the second edge portion (14) and the second connecting portion (15) each have a first surface and a second surface, and the first surface and the second surface are disposed opposite to each other; The first surface of the middle portion (11), the first surface of the first edge portion (12), the first surface of the first connecting portion (13), the first surface of the second edge portion (14), and the first surface of the second connecting portion (15) are located on the same plane. The second surface of the middle portion (11) is higher than the second surface of the first edge portion (12) and the second surface of the second edge portion (14). The second surface of the first connecting portion (13) is inclined between the second surface of the middle portion (11) and the second surface of the first edge portion (12). The second surface of the second connecting portion (15) is inclined between the second surface of the middle portion (11) and the second surface of the second edge portion (14).

5. The high-temperature fabric (10) according to any one of claims 1 to 4, characterized in that, The thickness of the middle part (11) is 0.75mm to 0.85mm.

6. The high-temperature fabric (10) according to any one of claims 1 to 4, characterized in that, The thickness of the middle part (11) is uniform.

7. The high-temperature fabric (10) according to any one of claims 1 to 4, characterized in that, The thickness of the first edge portion (12) is 0.3mm to 0.4mm, and the thickness of the second edge portion (14) is 0.3mm to 0.4mm.

8. The high-temperature fabric (10) according to any one of claims 1 to 4, characterized in that, The thickness of the first edge portion (12) and the second edge portion (14) is uniform, and the thickness of the first edge portion (12) is equal to the thickness of the second edge portion (14).

9. The high-temperature fabric (10) according to any one of claims 1 to 4, characterized in that, The high-temperature cloth is polytetrafluoroethylene glass fiber cloth.

10. A lamination apparatus, characterized in that, include: The support mechanism (20) is used to support the photovoltaic module; A pressurizing mechanism, disposed opposite to the bearing mechanism (20), the pressurizing mechanism being used to apply pressure to the photovoltaic module; and The high-temperature cloth (10) as described in any one of claims 1 to 9 is disposed on the bearing mechanism (20).

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