Frame group for photovoltaic module, photovoltaic module and photovoltaic power generation system

Abstract

The utility model discloses a frame group used for a photovoltaic assembly, a photovoltaic assembly and a photovoltaic power generation system, the frame group comprises a plurality of frames, the plurality of frames are successively connected end to end, at least one welding area is formed on the contact surface of two adjacent frames, and the welding area is arranged on the frame group. The frame is provided with a welding area, the welding area extends along the extension direction of the contact surface of the two adjacent frames, the size of the welding area in the extension direction of the contact surface is L, and L is greater than or equal to 1mm and less than or equal to 50mm. According to the frame group provided by the utility model, the structural strength is improved, so that the mechanical load strength of the photovoltaic module is improved, the optical module can be normally used for a long time, and the production efficiency of the frame group is also improved.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic technology, and in particular to a frame assembly for photovoltaic modules, a photovoltaic module, and a photovoltaic power generation system. Background Technology

[0002] When photovoltaic modules are used in natural environments, they are subjected to significant impacts from natural factors such as snow pressure, wind pressure, and hail. Therefore, photovoltaic modules need to have a certain mechanical load strength to withstand natural impacts and ensure a long service life.

[0003] In related technologies, photovoltaic modules have relatively weak mechanical load strength. After being subjected to natural impacts, photovoltaic modules are prone to damage or breakage, thereby shortening their service life. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this invention is to provide a frame assembly for photovoltaic modules that improves structural strength, thereby increasing the mechanical load strength of the photovoltaic modules, enabling long-term normal use of the modules, and also improving the production efficiency of the frame assembly.

[0005] Another objective of this invention is to provide a photovoltaic module employing the aforementioned frame assembly.

[0006] Another objective of this invention is to provide a photovoltaic power generation system employing the aforementioned frame assembly or photovoltaic modules.

[0007] According to a first aspect of the present invention, a frame assembly for a photovoltaic module includes: a plurality of frames connected end to end in sequence, and at least one welding area is formed on the contact surface of two adjacent frames. The welding area extends along the extension direction of the contact surface of the two adjacent frames, and the dimension of the welding area in the extension direction of the contact surface is L, wherein L satisfies: 1mm≤L≤50mm.

[0008] According to the frame assembly of this utility model, the welding area connects two adjacent frames into a whole, improving the connection strength of multiple frames in the frame assembly, thereby improving the structural strength of the frame assembly and giving it higher mechanical load strength. This, in turn, improves the mechanical load strength of the photovoltaic module, ensuring its long-term normal operation. Furthermore, it also improves the processing efficiency of the frame assembly.

[0009] According to some embodiments of the present invention, the welding area is recessed into the surface of the frame, and the depth of the welding area recessed downward relative to the surface of the frame is H, wherein H satisfies: 0.1mm≤H≤1.5mm.

[0010] According to some embodiments of the present invention, two adjacent frames are laser welded, and the dimension of the welding area on the surface of the frame in the direction perpendicular to the contact surface is D1, wherein D1 satisfies: 0.1mm≤D1≤3.5mm.

[0011] According to some embodiments of the present invention, two adjacent frame edges are resistively welded, and the dimension of the surface of the frame edge and the welding area in the direction perpendicular to the contact surface is D2, wherein D2 satisfies: 1mm≤D2≤10mm.

[0012] According to some embodiments of the present invention, the welding area is a continuous area; or, the welding area includes a plurality of sub-welding areas spaced apart along the extension direction of the contact surface.

[0013] According to some embodiments of the present invention, an installation space is formed on the frame, the installation space is formed inside the frame group, the edge of the photovoltaic body of the photovoltaic module is adapted to fit into the installation space, the outer side of the frame group includes a first side, a second side and a third side, the first side and the third side are opposite to each other along the height direction of the frame group, the height direction of the frame group is the same as the thickness direction of the photovoltaic body, the second side is located between the first side and the third side, and the welding area is formed on at least one of the first side, the second side and the third side.

[0014] According to some embodiments of the present invention, a receiving space is formed within the frame, and the receiving space and the mounting space are arranged along the height direction of the frame group. When the welding area is formed on the first side, the second side, or the third side, the frame group further includes a connector, which is disposed between two adjacent frames. A portion of the connector is fitted within the receiving space of the frame, and another portion of the connector is fitted within the receiving space of the adjacent frame.

[0015] According to some embodiments of the present invention, the dimension of the first side in the assembly direction of the frame and the photovoltaic body is W1, wherein W1 satisfies: 0mm≤W1≤45mm; and / or, the width of the second side in the height direction is W2, wherein W2 satisfies: 5mm≤W2≤50mm, and the height direction is perpendicular to the assembly direction.

[0016] A photovoltaic module according to a second aspect of the present invention includes a frame assembly for a photovoltaic module according to the first aspect of the present invention described above.

[0017] A photovoltaic power generation system according to a third aspect of the present invention includes a frame assembly for a photovoltaic module according to the first aspect of the present invention, or a photovoltaic module according to the second aspect of the present invention.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a schematic diagram of the frame assembly according to an embodiment of the present utility model;

[0021] Figure 2 This is a partial schematic diagram of the frame assembly according to an embodiment of the present utility model;

[0022] Figure 3 This is a partial schematic diagram of the frame assembly from another angle according to an embodiment of the present utility model;

[0023] Figure 4 This is a partial schematic diagram of the frame assembly from another angle according to an embodiment of the present utility model;

[0024] Figure 5 This is a schematic diagram of the border of the border group according to an embodiment of the present utility model;

[0025] Figure 6 yes Figure 5 Enlarged view of part A shown in the center circle;

[0026] Figure 7 This is a schematic diagram of the connecting member of the frame assembly according to an embodiment of the present utility model;

[0027] Figure 8 This is a schematic diagram of the frame assembly according to an embodiment of the present utility model, wherein a tensile test is performed;

[0028] Figure 9 This is a schematic diagram of the frame assembly according to an embodiment of the present utility model, wherein a load test is performed;

[0029] Figure 10 This is a schematic diagram of a photovoltaic module according to an embodiment of the present utility model.

[0030] Figure label:

[0031] 100. Border group;

[0032] 1. Border; 11. First side; 12. Second side; 13. Third side;

[0033] 14. Installation space; 15. Accommodation space;

[0034] 2. Welding area;

[0035] 3. Connecting component; 31. First connecting section; 32. Second connecting section;

[0036] 4. Mounting holes;

[0037] 200. Photovoltaic modules;

[0038] 201. Photovoltaic body. Detailed Implementation

[0039] The embodiments of this utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figures 1-9 The first aspect of the present invention describes a frame assembly 100 for a photovoltaic module 200.

[0040] like Figure 1 and Figure 2 As shown, the frame assembly 100 for a photovoltaic module 200 according to a first aspect embodiment of the present invention includes a plurality of frame 1s. In the description of the present invention, "a plurality of" means two or more.

[0041] Specifically, multiple frame 1s are connected end to end in sequence, and at least one welding area 2 is formed on the contact surface of two adjacent frame 1s. The welding area 2 extends along the extension direction of the contact surface of the two adjacent frame 1s, and the dimension of the welding area 2 in the extension direction of the contact surface is L, where L satisfies: 1mm≤L≤50mm.

[0042] For example, in Figure 1 and Figure 2 In the example, there are four borders 1, which are connected end to end to form a rectangle. The sides of the ends of two adjacent borders 1 are in contact with each other, and a welding area 2 is formed at the contact surface of the ends of two adjacent borders 1. The two adjacent borders 1 are connected into a whole through the welding area 2, and L is the length of the welding area 2 in the extension direction of the contact surface. When the length of the welding area 2 is less than 1mm, the length of the welding area 2 is too short, which reduces the connection strength between the two adjacent borders 1, making the contact surface of the two adjacent borders 1 prone to breakage during use and shortening the service life of the border group 100. When the length of the welding area 2 is greater than 50mm, the length of the welding area 2 is too large, which increases the time for the welding area 2 to form, thereby reducing the formation efficiency of the border group 100.

[0043] This configuration, through the welding area 2, allows multiple frame pieces 1 to be connected into a whole, increasing the connection strength of the frame pieces 100. This, in turn, enhances the structural strength and mechanical load-bearing capacity of the frame assembly 100, thereby increasing the mechanical load-bearing capacity of the photovoltaic module 200. This allows the photovoltaic module 200 to operate normally for extended periods even under natural impacts. Furthermore, the reasonable length of the welding area 2 further improves the connection strength at the contact surfaces of adjacent frame pieces 1, reducing the probability of breakage at these surfaces. This results in higher mechanical load-bearing capacity for the frame assembly 100, ensuring its long-term normal operation. It also shortens the formation time of the welding area 2 at the contact surfaces of adjacent frame pieces 1, thus improving the formation efficiency of the frame assembly 100.

[0044] According to the frame assembly 100 of this utility model, the welding area 2 connects two adjacent frame 1s into a whole, improving the connection strength of multiple frame 1s in the frame assembly 100, thereby improving the structural strength of the frame assembly 100 and giving it higher quality mechanical load strength. This, in turn, improves the mechanical load strength of the photovoltaic module 200, ensuring its long-term normal operation. Furthermore, it also improves the processing efficiency of the frame assembly 100.

[0045] According to some embodiments of this utility model, the welding area 2 is recessed into the surface of the frame 1, and the depth of the downward recess of the welding area 2 relative to the surface of the frame 1 is H, where H satisfies: 0.1mm ≤ H ≤ 1.5mm. For example, the depth of the welding area 2 along the thickness direction of the sidewall of the frame 1 is H. The surface of the contact surface of the frame 1 melts downward at high temperature to form a liquid, and then solidifies to form the welding area 2. When the depth of the welding area 2 is less than 0.1mm, the depth of the welding area 2 is small, which reduces the connection strength at the contact surface of adjacent frames 1, thereby reducing the connection strength of the frame assembly 100. When the depth of the welding area 2 is greater than 1.5mm, the depth of the welding area 2 is large, so the welding area 2 can easily penetrate the sidewall of the frame 1 and contact the photovoltaic body 201 of the photovoltaic module 200, thereby damaging the photovoltaic body 201 and shortening the service life of the photovoltaic module 200. Therefore, by setting the depth H of the welding area 2 to satisfy 0.1mm≤H≤1.5mm, the depth setting of the welding area 2 is reasonable, which strengthens the connection strength at the contact surface of adjacent frame 1, thereby improving the connection strength of the frame assembly 100 and enabling the frame assembly 100 to be used normally for a long time. In addition, it also prevents the welding area 2 from contacting the photovoltaic body 201 through the side wall of the frame 1, thereby avoiding damage to the photovoltaic body 201 and extending the service life of the photovoltaic module 200.

[0046] According to some embodiments of this utility model, refer to Figure 3Two adjacent frame pieces 1 are laser-welded. The dimension of the welding area 2 on the surface of frame 1, extending perpendicularly to the contact surface, is D1, where D1 satisfies: 0.1mm ≤ D1 ≤ 3.5mm. For example, when welding area 2 is formed by laser beam welding, the dimension of welding area 2 extending perpendicularly to the contact surface is D1, that is, the width of welding area 2 extending perpendicularly to the contact surface is D1, where D1 satisfies: 0.1mm ≤ D1 ≤ 3.5mm. When the width of welding area 2 is less than 0.1mm, the width of welding area 2 is small, reducing the connection strength of the contact surface between adjacent frame pieces 1, thereby reducing the connection strength of frame assembly 100. When the width of welding area 2 is greater than 3.5mm, the width of welding area 2 is large, increasing the welding area and requiring more welding time to complete, thus reducing welding efficiency. Therefore, by setting the width D1 of the welding area 2 to satisfy 0.1mm≤D1≤3.5mm, the width setting of the welding area 2 is reasonable, which improves the connection strength of the connected frame 1, thereby improving the connection strength of the frame group 100. In addition, the formation time of the welding area 2 is shortened, thereby improving the formation efficiency of the welding area 2, and further improving the formation efficiency of the frame group 100.

[0047] According to some other embodiments of the present invention, refer to Figure 4Two adjacent frame pieces 1 are resistance welded. The dimension of the welding area 2 on the surface of frame 1, extending perpendicularly to the contact surface, is D2, where D2 satisfies: 1mm ≤ D2 ≤ 10mm. For example, when the welding area 2 is formed by resistance heating welding, the dimension of the welding area 2 extending perpendicularly to the contact surface is D2, which is also the width of the welding area 2 extending perpendicularly to the contact surface, D2 satisfying: 1mm ≤ D2 ≤ 10mm. When the width of the welding area 2 is less than 1mm, the width of the welding area 2 is small, reducing the connection strength of the contact surface between adjacent frame pieces 1, thereby reducing the connection strength of the frame assembly 100. When the width of the welding area 2 is greater than 10mm, the width of the welding area 2 is large, increasing the welding area and requiring more welding time to complete, thus reducing welding efficiency. Furthermore, it also increases the heated area during the formation of the welding area 2, reducing the mechanical properties of the contact surface of frame 1, thereby reducing the reliability of frame 1 in use. Therefore, by setting the width D2 of the welding area 2 to satisfy 1mm≤D2≤10mm, the width of the welding area 2 is reasonably set, improving the connection strength of the adjacent frame 1, thereby improving the connection strength of the frame assembly 100. Furthermore, the formation time of the welding area 2 is shortened, thus improving the formation efficiency of the welding area 2, and consequently improving the formation efficiency of the frame assembly 100. Additionally, the heated area during the formation of the welding area 2 is reduced, improving the mechanical properties of the contact surface of the frame 1, thereby improving the reliability of the frame 1 in use.

[0048] According to some embodiments of this utility model, the welding area 2 is a continuous area (e.g., ...). Figure 2 (As shown); or, the welding area 2 includes a plurality of sub-welding areas 2 spaced apart along the extension direction of the contact surface. Thus, when the welding area 2 is a continuous area, the welding area 2 extends continuously along the extension direction of the contact surface, thereby further improving the connection strength at the contact surface of two adjacent frame 1s and increasing the structural strength of the frame assembly 100. When the welding area 2 includes a plurality of sub-welding areas 2 spaced apart along the extension direction of the contact surface (i.e., the length direction of the welding area 2), the sub-welding areas 2 are dots or line segments, reducing the amount of material used when forming the welding area 2, thereby reducing the cost of forming the welding area 2 and reducing the production cost of the frame assembly 100.

[0049] According to some embodiments of this utility model, refer to Figure 4 , Figure 5 and Figure 6An installation space 14 is formed on the frame 1, and the installation space 14 is formed inside the frame assembly 100. The edge of the photovoltaic body 201 of the photovoltaic module 200 is adapted to fit into the installation space 14. The outer surface of the frame assembly 100 includes a first side 11, a second side 12, and a third side 13. The first side 11 and the third side 13 are along the height direction of the frame assembly 100 (e.g., ...). Figure 5 (As shown in the vertical direction) opposite, the height direction of the frame group 100 is the same as the thickness direction of the photovoltaic body 201, the second side 12 is located between the first side 11 and the third side 13, and the welding area 2 is formed on at least one of the first side 11, the second side 12 and the third side 13.

[0050] For example, in Figure 4 , Figure 5 and Figure 6 In the example, the first side 11 and the third side 13 are opposite each other in the vertical direction, with the first side 11 located below the third side 13. The lower side of the second side 12 is connected to the side of the first side 11 closest to the second side 12, and the upper side of the second side 12 is connected to the side of the third side 13 closest to the second side 12. The opposing surfaces of the first side 11 and the third side 13, along with the side of the second side 12 facing the first side 11, form the inner side of the frame 1. The opposing surfaces of the first side 11 and the third side 13, along with the side of the second side 12 away from the first side 11, form the outer side of the frame 1. The edges of the photovoltaic body 201 are installed in the mounting space 14 of the frame 1 along the assembly direction. The four frames 1 are respectively installed corresponding to the four circumferential edges of the photovoltaic body 201, that is, the frame group 100 is arranged around the circumference of the photovoltaic body 201. This arrangement, along with the setting of the mounting space 14, facilitates the assembly of the frame 1 and the photovoltaic body 201, improving the assembly efficiency of the photovoltaic module 200. Furthermore, the frame 1 protects the photovoltaic body 201 and facilitates its use. Additionally, the welding area 2 can be formed on at least one of the contact surfaces of the first side 11, the second side 12, and the third side 13 of adjacent frame 1. This improves the flexibility of the welding area 2 formation while ensuring the connection strength of adjacent frame 1s, allowing for specific configuration based on actual usage requirements. The thickness of the frame sidewall is d, where d satisfies: 0.1mm ≤ d ≤ 2mm. The reasonable thickness of the frame 1 sidewall notation improves the structural strength and extends the service life of the frame 1 while reducing material usage and production costs, thereby lowering the production cost of the frame assembly 100.

[0051] According to some embodiments of this utility model, refer to Figures 5-7 A receiving space 15 is formed within the frame 1, and the receiving space 15 and the mounting space 14 are along the height direction of the frame assembly 100 (e.g.,Figure 5 (As shown in the vertical direction) When the welding area 2 is formed on the first side 11, the second side 12, or the third side 13, the frame assembly 100 also includes a connector 3. The connector 3 is disposed between two adjacent frame 1s, with a part of the connector 3 fitting within the receiving space 15 of the frame 1, and another part of the connector 3 fitting within the receiving space 15 of the adjacent frame 1. For example, in Figures 5-7 In the example, the receiving space 15 is also formed on the inner side of the frame 1, and the mounting space 14 is formed above the receiving space 15. When the welding area 2 is formed on one of the first side 11, the second side 12, and the third side 13, adjacent frames 1 are also connected by connectors 3. When the connectors 3 are assembled in the receiving space 15, the connectors 3 are interference-fitted with the sidewalls of the receiving space 15. With this arrangement, the contact surfaces of two adjacent frames 1 are connected by the welding area 2 and the connectors 3, which further effectively improves the connection strength of the two adjacent frames 1, thereby improving the structural strength of the frame assembly 100.

[0052] Furthermore, in conventional technology, corner brackets are installed on two adjacent frame sides; in this application, connectors 3 are installed on two adjacent frame sides 1, and welding areas 2 are provided on the contact surfaces of the first side faces 11 of the two adjacent frame sides 1. A tensile test is performed between the frame group in the conventional technology and the frame group 100 in the main body application, such as... Figure 8 As shown, a tensile test is performed on the frame assembly 100 in the direction indicated by the two arrows B. The tensile force in the conventional technology is about 20N, while the tensile force in this application can reach 1846N.

[0053] Load tests were performed on the border group in the traditional technology and the border group 100 in the body application, such as... Figure 9 As shown, four mounting holes 4 are provided on the outer side of the frame assembly (i.e., the frame assembly is installed using an outer four-hole mounting method) to install the photovoltaic modules. The tested photovoltaic module model is CS6.2-66TB, and the frame model is F67&F71. Testing showed that conventional technology yielded a load of +5400Pa / -2400Pa, while this application yielded a load of +6000Pa / -3100Pa. This effectively demonstrates that the frame assembly 100 of this application has a higher mechanical load strength, facilitating long-term normal use.

[0054] When the welding area 2 is formed on two or three of the first side 11, second side 12, and third side 13, the frame assembly 100 does not include the connector 3, meaning that no connector 3 is provided on adjacent frames 1, eliminating the need for connector 3 production and thus reducing the production cost of the frame assembly 100. Furthermore, while ensuring structural strength, the thickness of the sidewalls of the frame 1 can be reduced, thereby reducing the material usage of the frame 1 and lowering its production cost. In addition, connecting multiple frames 100 more reliably without requiring any other components allows the four frames 100 to form a reliable and stable rectangle, increasing the mechanical load strength of the frame assembly 100 and thus improving the mechanical load strength of the photovoltaic module 200. However, this is not limited to this; when welding areas 2 are formed on the first side 11, second side 12, and third side 13 of adjacent frames 1, the adjacent frames 1 can also be connected by connector 3, further enhancing the connection strength between adjacent frames 1. It should be noted that the number of welding areas 2 formed on the first side 11, the second side 12 and the third side 13, as well as the setting method of the connector 3 (e.g., whether to set the connector 3), can be specifically set according to the actual use situation to meet the actual needs.

[0055] Optionally, refer to Figure 7 The connector 3 includes a first connecting segment 31 and a second connecting segment 32, which are perpendicular to each other. The length of the first connecting segment 31 is M1, wherein M1 satisfies: 0≤M1≤60mm; and / or the length of the second connecting segment 32 is M2, wherein M2 satisfies: 0≤M2≤60mm.

[0056] For example, the first connecting segment 31 of connector 3 fits within the receiving space 15 of frame 1, and the second connecting segment 32 of connector 3 fits within the receiving space 15 of the adjacent frame 1. The connector 3 can be configured in the following ways: First, the length of the first connecting segment 31 is M1, where M1 satisfies: 0 ≤ M1 ≤ 60 mm. Second, the length of the second connecting segment 32 is M2, where M2 satisfies: 0 ≤ M2 ≤ 60 mm. Third, the lengths of the first connecting segment 31 and the second connecting segment 32 are both M1 and M2, respectively, where M1 and M2 satisfy: 0 ≤ M1 ≤ 60 mm and 0 ≤ M2 ≤ 60 mm. Thus, by setting the lengths of the first connecting segment 31 and the second connecting segment 32 reasonably, the material usage of the first connecting segment 31 and the second connecting segment 32 is reduced, lowering the production cost of the first connecting segment 31 and the second connecting segment 32, and consequently, the production cost of connector 3. Furthermore, it also shortens assembly time and improves assembly efficiency.

[0057] According to some embodiments of this utility model, refer to Figure 5 and Figure 6The dimension of the first side 11 in the assembly direction between the frame 1 and the photovoltaic body 201 is W1, wherein W1 satisfies: 0mm≤W1≤45mm; and / or, the dimension of the second side 12 in the aforementioned height direction (e.g., Figure 5 The dimension in the vertical direction (as shown) is W2, where W2 satisfies: 5mm ≤ W2 ≤ 50mm, and the aforementioned height direction is perpendicular to the aforementioned assembly direction. For example, the arrangement of the first side 11 and the second side 12 includes the following cases: First, the dimension of the first side 11 in the assembly direction between the frame 1 and the photovoltaic body 201 is W1, where W1 satisfies: 0mm ≤ W1 ≤ 45mm. Second, the dimension of the second side 12 in the aforementioned height direction is W2, where W2 satisfies: 5mm ≤ W2 ≤ 50mm. Third, the dimension of the first side 11 in the assembly direction between the frame 1 and the photovoltaic body 201 is W1, and the dimension of the second side 12 in the aforementioned height direction is W2, where W1 and W2 respectively satisfy: 0mm ≤ W1 ≤ 45mm, 5mm ≤ W2 ≤ 50mm.

[0058] For example, W1 is the width of the first side 11 in the aforementioned assembly direction, and W2 is the width of the second side 12 in the aforementioned height direction. When the width W1 of the first side 11 is greater than 45mm, the width of the first side 11 is relatively large, increasing the material usage of the first side 11, thereby increasing the material usage of the frame 1 and increasing the production cost of the frame assembly 100. When the width W2 of the second side 12 is less than 5mm, the width of the second side 12 is relatively small, reducing the height of the accommodating space 15, thereby increasing the assembly difficulty of the connector 3 and the frame 1 and reducing assembly efficiency. When the width of the second side 12 is greater than 50mm, the width of the second side 12 is relatively large, thereby increasing the amount of frame 1 used and increasing the production cost of the frame assembly 100. Therefore, by setting the width of the first side 11 in the assembly direction between the frame 1 and the photovoltaic body 201 to be W1, and the width of the second side 12 in the aforementioned height direction to be W2, where W1 and W2 respectively satisfy: 0mm≤W1≤45mm, 5mm≤W2≤50mm, the widths of the first side 11 and the second side 12 are reasonably set, thereby reducing the material usage of the frame 1 and lowering the production cost of the frame assembly 100. Furthermore, the height of the accommodating space 15 is increased, thereby reducing the assembly difficulty of the connector 3 and the frame 1 and improving assembly efficiency. It should be noted that when W1 is 0, only the frame 1 lacks the first side 11; the frame 1 still has the installation space 14 and the accommodating space 15.

[0059] According to some embodiments of this utility model, two adjacent frame edges 1 are connected by welding. For example, two adjacent frame edges 1 can be connected by welding, forming only one weld at the contact surface of the two adjacent frame edges 1, i.e., the welding area 2 is the weld. This arrangement results in a higher connection strength at the contact surface of the two adjacent frame edges 1, improving the structural strength and stability of the frame assembly 100. Furthermore, welding provides high efficiency, low cost, strong adaptability, and a compact structure, thereby improving the formation efficiency of the frame assembly 100 and facilitating its use. It should be noted that when welding on the first side 11 and the second side 12, welding can be performed on either the inner or outer surface of the frame edge 1; however, when welding on the third side 13, welding can only be performed on the outer surface of the frame edge 1.

[0060] When two adjacent frame 1s are connected by welding, the welding processes include laser beam welding, resistance heating welding, argon arc welding, friction stir welding, or ultrasonic welding. When laser beam welding is used, a high-energy-density laser beam is used as a heat source to weld the two adjacent frame 1s. High-quality welding can be achieved by precisely controlling the power and duration of the laser beam. Continuous or pulsed lasers can be used, with laser wavelengths ranging from 300nm to 3500nm, laser power from 1 to 150KW, and laser welding speeds from 1 to 55mm / s. This method offers advantages such as good weld quality and high welding precision. When resistance heating welding is used, the heat generated by the resistance between components and the welding current is used for welding, offering advantages such as fast welding speed, good weld quality, simple operation, and energy saving and environmental protection. When argon arc welding is used, the process utilizes a tungsten inert arc (TIA) under argon gas protection. It is mainly based on processes such as arc discharge, gas protection, thermal melting, and metal filling, offering advantages such as high weld quality, stable arc, and a small heat-affected zone. When the welding process is friction stir welding, a rotating tool generates frictional heat on two adjacent frame pieces 1. Through mechanical stirring, the frame pieces 1 undergo plastic deformation and mix together, thus forming a high-quality weld. This process also has the advantages of minimal welding deformation and energy saving. When the welding process is ultrasonic welding, high-frequency vibration waves are transmitted to the surfaces of two adjacent frame pieces 1. Under pressure, the surfaces of the frame pieces 1 rub against each other, generating heat. This causes the frame pieces 1 to reach their melting or softening point, achieving welding. This process has the advantages of high welding strength, fast welding speed, minimal damage to the frame pieces 1, and environmental protection and energy saving.

[0061] Laser beam welding utilizes continuous infrared laser to weld the contact surfaces of the first side 11 of two adjacent frame 1s of a photovoltaic module 200 into a strong weld seam (i.e., welding area 2), thereby enhancing the mechanical load strength of the photovoltaic module 200. The welding process using laser beam welding is as follows: 1) Assemble the photovoltaic body 201 of the photovoltaic module 200 normally with the four frame 1s, then press and fix the frame 1s in place, keeping the photovoltaic module 200 stationary. 2) Use a vision positioning device to position the module above the first side 11 of the frame 1, locating it to the contact surface of two adjacent frame 1s. 3) Transmit the information collected by the vision positioning device to the controller, which then controls the laser device to precisely emit light for welding, forming welding area 2 on the contact surface. 4) Release the photovoltaic module 200, allowing it to flow out.

[0062] It should be noted that when using laser beam welding, the contact surfaces of two adjacent frame pieces 1 of the photovoltaic module 200 must be tightly fitted without significant gaps. The infrared laser wavelength is 1050nm~1090nm, the laser power is 1KW~50KW, and the laser welding speed is 15 mm / s~55 mm / s. Specific welding parameters can be adjusted according to the material type and specifications of the frame pieces 1. The laser focus is set on the surface of the contact surface (i.e., the joint) of the first side 11 of the two adjacent frame pieces 1. The laser melts the material at the focal point, and the molten material droplets diffuse and fuse, achieving welding and melting of the contact surface (i.e., the joint) of the first side 11 of the two adjacent frame pieces 1. The laser focus advances spirally along the welding trajectory, and the molten material solidifies to form a connection. However, this is not the only possible method.

[0063] Resistance heating welding is a welding method that uses resistance heating to heat and melt the contact surfaces of the first side 11 of two adjacent frame 1s of a photovoltaic module 200, forming a single unit, thereby enhancing the mechanical load strength of the photovoltaic module 200. The welding process using laser beam welding is as follows: 1) Assemble the photovoltaic body 201 of the photovoltaic module 200 normally with the four frame 1s, then press and fix the frame 1s in place, keeping the photovoltaic module 200 stationary. 2) Use a visual positioning device to position the first side 11 of the frame 1 above, locating the contact surfaces of two adjacent frame 1s. 3) Transmit the information collected by the visual positioning device to the controller, which then controls the resistance heating welding head to press against the contact surface (i.e., the seam) of the first side 11, while simultaneously rotating the support component below the contact surface of the first side 11. 4) The resistance heating welding head and the support component clamp the contact surface of the first side 11 and begin welding, forming a welding area 2 on the contact surface. 5) Release the photovoltaic module 200, allowing it to flow out.

[0064] It should be noted that when using resistance heating welding, the contact surfaces of two adjacent frame 1s of the photovoltaic module 200 must be tightly fitted without significant gaps. Specific welding parameters can be adjusted according to the material type and specifications of the frame 1. During welding, the lower support and the resistance heating welding head require appropriate clamping force. The molten material from the resistance heating welding head will diffuse and fuse under the clamping force, achieving welding fusion of the first side surface 11 (i.e., the joint) of the two adjacent frame 1s. However, this is not the only limitation.

[0065] Furthermore, during the welding process, there is no need to change the assembly process of the photovoltaic module 200. Only simple modifications are required to the frame mounting machine or junction box welding machine. This involves adding a visual positioning component and welding components to the top of the frame mounting machine or junction box welding machine, or adding a new device after the frame 1 mounting machine to achieve welding of the contact surfaces of adjacent frame 1s. This makes it easy to implement and significantly improves the performance of the photovoltaic module 200, providing technical reserves for further thinning of the frame 1 to reduce costs.

[0066] A photovoltaic module 200 according to a second aspect embodiment of the present invention includes a frame assembly 100 for the photovoltaic module 200 according to the first aspect embodiment of the present invention described above.

[0067] According to the present invention, the photovoltaic module 200, by adopting the above-mentioned frame assembly 100, improves the mechanical load strength of the photovoltaic module 200, thereby extending the service life of the photovoltaic module 200.

[0068] A photovoltaic power generation system (not shown) according to a third aspect embodiment of the present invention includes a frame assembly 100 for a photovoltaic module 200 according to the first aspect embodiment of the present invention, or a photovoltaic module 200 according to the second aspect embodiment of the present invention.

[0069] According to the photovoltaic power generation system of this utility model, by adopting the above-mentioned frame group 100 or photovoltaic module 200, the service life of the photovoltaic power generation system is extended.

[0070] Other components and operations of the frame assembly 100, photovoltaic module 200, and photovoltaic power generation system according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0071] In the description of this utility model, it should be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 utility model.

[0072] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0073] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A frame assembly for photovoltaic modules, characterized in that, include: Multiple frame borders are connected end to end in sequence. At least one welding area is formed on the contact surface of two adjacent frame borders. The welding area extends along the extension direction of the contact surface of the two adjacent frame borders. The dimension of the welding area in the extension direction of the contact surface is L, wherein L satisfies: 1mm≤L≤50mm.

2. The frame assembly for photovoltaic modules according to claim 1, characterized in that, The welding area is recessed into the surface of the frame, and the depth of the welding area recessed downward relative to the surface of the frame is H, wherein H satisfies: 0.1mm≤H≤1.5mm.

3. The frame assembly for photovoltaic modules according to claim 1, characterized in that, The two adjacent frames are laser welded together. The dimension of the welding area on the surface of the frame in the direction perpendicular to the contact surface is D1, wherein D1 satisfies: 0.1mm≤D1≤3.5mm.

4. The frame assembly for photovoltaic modules according to claim 1, characterized in that, The two adjacent frames are resistively welded, and the dimension of the welding area on the surface of the frame in the direction perpendicular to the contact surface is D2, wherein D2 satisfies: 1mm≤D2≤10mm.

5. The frame assembly for photovoltaic modules according to claim 1, characterized in that, The welding area is a continuous area; or, The welding area includes a plurality of sub-welding areas spaced apart along the extension direction of the contact surface.

6. The frame assembly for a photovoltaic module according to any one of claims 1-5, characterized in that, An installation space is formed on the frame, the installation space is formed inside the frame assembly, the edge of the photovoltaic body of the photovoltaic module is adapted to fit into the installation space, the outer side of the frame assembly includes a first side, a second side and a third side, the first side and the third side are opposite to each other along the height direction of the frame assembly, the height direction of the frame assembly is the same as the thickness direction of the photovoltaic body, the second side is located between the first side and the third side, and the welding area is formed on at least one of the first side, the second side and the third side.

7. The frame assembly for photovoltaic modules according to claim 6, characterized in that, An accommodating space is formed within the frame, and the accommodating space and the mounting space are arranged along the height direction of the frame assembly. When the welding area is formed on the first side, the second side, or the third side, the frame assembly further includes: A connector is provided between two adjacent frames, a portion of which fits into the receiving space of the frame, and another portion of which fits into the receiving space of the adjacent frame.

8. The frame assembly for photovoltaic modules according to claim 6, characterized in that, The dimension of the first side surface in the assembly direction between the frame and the photovoltaic body is W1, wherein W1 satisfies: 0mm ≤ W1 ≤ 45mm; and / or, The dimension of the second side in the height direction is W2, wherein W2 satisfies: 5mm≤W2≤50mm, and the height direction is perpendicular to the assembly direction.

9. A photovoltaic module, characterized in that, Includes a frame assembly for a photovoltaic module according to any one of claims 1-8.

10. A photovoltaic power generation system, characterized in that, Includes the frame assembly for a photovoltaic module according to any one of claims 1-8, or the photovoltaic module according to claim 9.

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