Photovoltaic modules, photovoltaic module manufacturing methods, welding equipment and string welding machines
By bending the extension section of the solder strip and connecting the busbar, the problems of hidden cracks and secondary tinning caused by the concealment of the busbar in photovoltaic module production were solved, thereby improving the yield and production efficiency of photovoltaic modules.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- WUXI LEAD INTELLIGENT EQUIP CO LTD
- Filing Date
- 2026-04-07
- Publication Date
- 2026-07-31
AI Technical Summary
In the current photovoltaic module manufacturing process, when the busbar is hidden behind the cell string, the horizontal pressure welding process causes microcracks and poor secondary soldering, which reduces the yield of photovoltaic modules.
The extension of the welding strip is bent at a first preset angle to physically isolate it from the surface of the second battery cell, and the busbar is connected to the extension to avoid direct welding of the second battery cell. Welding is achieved using a welding device.
This reduces the risk of microcracks in the second solar cell, avoids defects in secondary tinning, and improves the yield and production efficiency of photovoltaic modules.
Smart Images
Figure CN122497136A_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of photovoltaic module processing technology, and particularly relates to a photovoltaic module, a method for preparing a photovoltaic module, a welding device and a string welding machine. Background Technology
[0002] With the rapid development of photovoltaic technology, the requirements for photoelectric conversion efficiency and aesthetics of photovoltaic modules are increasing. Full-screen modules (high screen-to-body ratio modules), as a new type of photovoltaic module structure, effectively increase the effective light-receiving area by hiding the busbars from the sides of the front of the cell string to the back, thus improving the overall power generation efficiency and appearance consistency of the module. This has become an important direction for the development of photovoltaic module technology.
[0003] However, in the current technology, during the production of photovoltaic modules, for conventional photovoltaic modules, the busbars are usually arranged on both sides of the cell string. The horizontal pressure welding process is usually used to weld the busbars to the cell string. This process uses a pressure welding head to press vertically down from above to horizontally press the busbars onto the surface of the cell string, and uses local heating to achieve the welding connection. When the screen ratio is increased (i.e., full screen), the busbars need to be hidden behind the cell string. At this time, if the horizontal pressure welding process is still used, it will bring defects such as microcracks and secondary soldering, which will reduce the yield of photovoltaic modules.
[0004] Currently, there is an urgent need for a method for manufacturing photovoltaic modules to solve the above problems. Summary of the Invention
[0005] One objective of this application is to provide a photovoltaic module, a method for preparing a photovoltaic module, a welding apparatus, and a string welding machine.
[0006] According to a first aspect of the embodiments of this application, a method for manufacturing a photovoltaic module is provided, comprising: S01, the welding strip includes an extension segment and a connecting segment connected together, the extension segment being bent at a first preset angle toward the connecting segment; S01, move the busbar to one side of the extension section, the length direction of the welding strip is the first direction, the length direction of the busbar is the second direction, and the first direction intersects the second direction; S03, connect the busbar to the extension section; S04, bend the extension segment to the side opposite to the connecting segment at a second preset angle.
[0007] Optionally, the photovoltaic module includes at least two battery strings, each battery string including a first battery cell and a second battery cell arranged sequentially along a first direction, wherein the first battery cell is disposed at the end of the battery string; The method for preparing the photovoltaic module further includes S05, wherein S05 is located before S01 or between S01 and S02; In step S05, the connecting segment is located on the first battery cell, and the extension segment is located near the second battery cell.
[0008] Optionally, the first battery cell and the second battery cell abut against each other along the first direction or partially overlap in the first direction.
[0009] Optionally, the method for manufacturing the photovoltaic module further includes S06, wherein S06 is located before S01, between S01 and S02, or between S02 and S03 or between S03 and S04; In step S06, the insulating strip is placed on the second battery cell. In step S04, the busbar is located between the insulating strip and the second battery cell.
[0010] Optionally, the method for manufacturing the photovoltaic module further includes S06, wherein S06 is located before S01 or between S01 and S02; In step S06, the insulating strip is connected to the busbar. In step S04, the busbar is located between the insulating strip and the second battery cell.
[0011] Optionally, the method for manufacturing the photovoltaic module further includes S07, wherein S07 is located before S01, between S01 and S02, between S03 and S04, or after S04; In step S07, the extension segment is bent at a third preset angle along the second direction, and the extension segment and the connecting segment are arranged at intervals along the second direction.
[0012] Optionally, the first preset angle is between 100° and 80°.
[0013] Optionally, the busbar and the extension are interconnected by welding, bonding, or coating.
[0014] Optionally, in step S02, the busbar is moved to one side of the extension section by a transport mechanism, and the busbar is abutted against the extension section by a fixing mechanism.
[0015] According to a second aspect of the embodiments of this application, a photovoltaic module is provided, the photovoltaic module comprising: A battery string, the battery string comprising a first battery cell and a second battery cell arranged sequentially along a first direction, the first battery cell being located at the end of the battery string; The busbar and a plurality of solder strips are arranged at intervals along a second direction. Each solder strip includes a connected connecting section and an extension section. The solder strip extends along a first direction. The connecting section is connected to the first battery cell. The busbar extends along a second direction and is located on the side of the extension section facing the second battery cell. The first direction intersects with the second direction.
[0016] Optionally, the battery string further includes a series solder strip, through which the first battery cell and the second battery cell are connected.
[0017] Optionally, the photovoltaic module further includes an insulating strip disposed on the second solar cell, the insulating strip extending along the second direction, and the extension segment, the busbar, and the insulating strip being stacked in sequence.
[0018] According to a third aspect of the embodiments of this application, a welding apparatus is provided, comprising: A fixing mechanism, the fixing mechanism including at least one first fixing component, the first fixing component including a first driving member and a first fixing member, the first fixing member being connected to the first driving member; A welding mechanism, wherein the welding mechanism and the first fixing member are arranged along a first direction; A transport mechanism, which can be located between the first fixing member and the welding mechanism.
[0019] Optionally, the conveying mechanism is configured to move the busbar to one side of the extension of the welding strip; The first driving member can drive the first fixing member to move toward the welding mechanism to press the busbar against the extension section; The welding mechanism is configured to weld the busbar to the extension.
[0020] Optionally, the first fastener includes at least one first fixed shaft; The conveying mechanism includes a conveying component, which includes a mounting component and at least one suction component. The suction component is disposed on the mounting component, and the mounting component has at least one through slot with an opening. The conveying assembly includes a first position, in which the opening faces upward in a third direction, the adsorption member faces the welding mechanism, and the first fixed shaft and the through groove are arranged correspondingly along a first direction; The third direction intersects with the first direction.
[0021] Optionally, the first fixing member further includes a first connecting plate, the first connecting plate being connected to the first driving member, the first connecting plate having at least one clearance groove, and the first fixing member including at least two first fixing shafts, the at least two first fixing shafts being respectively disposed on both sides of the clearance groove; The fixing mechanism further includes at least one second fixing component, which is disposed on the side of the first connecting plate facing away from the welding mechanism. The second fixing component includes a second driving member and a second fixing member, which is connected to the second driving member. At least a portion of the second fixing member corresponds to the clearance groove.
[0022] Optionally, the conveying mechanism further includes a second drive component; The second drive assembly includes a rotating component, and the conveying assembly is connected to the rotating component; or The second drive assembly includes a third drive member, and the conveying assembly is connected to the third drive member, the third drive member being capable of driving the conveying assembly to move in a third direction; or The second drive assembly includes a rotating component and a third drive component, the conveying assembly is connected to the third drive component, and the third drive component is connected to the rotating component; or The second drive assembly includes a rotating component and a third drive component, the conveying assembly is connected to the rotating component, and the rotating component is connected to the third drive component.
[0023] Optionally, the welding mechanism includes a third drive assembly and a welding assembly, wherein the welding assembly is connected to the third drive assembly.
[0024] According to a fourth aspect of the embodiments of this application, a string welding machine is provided, including the welding apparatus described above.
[0025] One technical advantage of this application embodiment is that by bending the extension of the solder strip at a first preset angle, the extension is physically isolated from the surface of the second cell, and then the busbar is connected to the extension, which can reduce the risk of microcracks in the second cell and avoid the problem of secondary soldering defects, thereby improving the yield and production efficiency of photovoltaic modules.
[0026] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description
[0027] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present application and, together with their description, serve to explain the principles of the present application.
[0028] Figure 1This is a schematic diagram of a photovoltaic module in an embodiment of this application; Figure 2 for Figure 1 Enlarged view of point A in the image; Figure 3 for Figure 2 Enlarged view of point B in the image; Figure 4 This is an enlarged view of the photovoltaic module in step S01 of the embodiments of this application; Figure 5 This is an enlarged view of the photovoltaic module in step S02 of the embodiments of this application; Figure 6 This is an enlarged view of the photovoltaic module in step S03 of the embodiments of this application; Figure 7 for Figure 6 Enlarged view of point C in the image; Figure 8 This is an enlarged view of the photovoltaic module in step S06 of the embodiments of this application; Figure 9 This is an enlarged view of the photovoltaic module in step S04 of the embodiments of this application; Figure 10 This is a schematic diagram of the welding apparatus in an embodiment of this application; Figure 11 for Figure 10 Enlarged view of point D in the image; Figure 12 This is a schematic diagram of the welding apparatus in an embodiment of this application; Figure 13 for Figure 12 Enlarged view of point E in the image; Figure 14 This is a schematic diagram of the welding apparatus in an embodiment of this application; Figure 15 for Figure 14 Enlarged view of point F in the image; Figure 16 This is a schematic diagram of the welding apparatus in an embodiment of this application; Figure 17 for Figure 16 A magnified view of point G in the image.
[0029] Explanation of reference numerals in the attached figures: Photovoltaic module 100; first solar cell 101; second solar cell 102; busbar 103; welding ribbon 104; connecting section 1041; extension section 1042; insulating strip 105; battery string 106; first battery string 106a; second battery string 106b; series welding ribbon 107; Welding equipment 200; Fixing mechanism 1; first fixing component 11; first driving component 111; first fixing component 112; first connecting plate 1121; clearance groove 11212; first fixing shaft 1122; second fixing component 12; second driving component 121; second fixing component 122; second connecting plate 1221; second fixing shaft 1222; 2. Handling mechanism; 21. Handling component; 211. Mounting component; 2111. Through channel; 2112. Adsorption component; 212. Welding mechanism 3; Welding assembly 31; Rack 4; Drive mechanism 5. Detailed Implementation
[0030] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps set forth in these embodiments do not limit the scope of the present application.
[0031] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.
[0032] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.
[0033] In all the examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.
[0034] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.
[0035] In the specification and claims of this invention, the terms "first" and "second" may explicitly or implicitly include one or more of those features. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.
[0036] In the description of this invention, it should be understood that if the terms "axial", "radial", etc., are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this invention 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 invention.
[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0038] First, it should be noted that the first direction, second direction, and third parties mentioned in the embodiments of this application are referred to in the appendix. Figure 1 , Figure 2 , Figure 4 , Figure 12 and Figure 14 The marked directions. Among them, the axis of the first direction, the axis of the second direction, and the axis of the third direction intersect each other.
[0039] like Figures 1-9 As shown, according to a first aspect of the embodiments of this application, a method for manufacturing a photovoltaic module 100 is provided, comprising: S01, the welding strip 104 includes an extension segment 1042 and a connecting segment 1041 connected together, and the extension segment 1042 is bent at a first preset angle toward the connecting segment 1041; S02, move the busbar 103 to one side of the extension 1042, the length direction of the welding strip 104 is the first direction, the length direction of the busbar 103 is the second direction, and the first direction and the second direction intersect; S03, connect the busbar 103 to the extension section 1042; S04, bend the extension segment 1042 to the side opposite to the connecting segment 1041 at a second preset angle.
[0040] like Figure 4As shown, in step S01, the solder strip 104 includes an extension segment 1042 and a connecting segment 1041 connected together. The extension segment 1042 and the connecting segment 1041 can be the same solder strip 104. The solder strip 104 extends along a first direction, that is, the length direction of the solder strip 104 is the first direction. The extension segment 1042 is bent at a first preset angle toward the connecting segment 1041. It can be understood that the length direction of the extension segment 1042 is different from the length direction of the connecting segment 1041.
[0041] like Figure 5 As shown, in step S02, after the busbar 103 is cut, the busbar 103 is moved to one side of the extension section 1042, which can be the side of the extension section 1042 facing away from the connecting section 1041, wherein the length direction of the busbar 103 is the second direction.
[0042] like Figure 6 and Figure 7 As shown, in step S03, the busbar 103 and the extension 1042 of the solder strip 104 are connected together.
[0043] like Figure 9 As shown, in step S04, the extension segment 1042 is connected to the busbar 103, and then the extension segment 1042 is bent at a second preset angle toward the end opposite to the connecting segment 1041.
[0044] In this application, by bending the extension 1042 of the solder strip 104 at a first preset angle, the extension 1042 is physically isolated from the surface of the second cell 102, and then the busbar 103 is connected to the extension 1042, thereby reducing the risk of microcracks in the second cell 102 and avoiding the problem of secondary soldering defects, so as to improve the yield and production efficiency of the photovoltaic module 100.
[0045] In the embodiment where the welding strip 104 and the busbar 103 are welded, specifically, since the busbar 103 is welded to the upright extension 1042 of the welding strip 104, the welding pressure applied by the welding head of the welding mechanism 3 acts directly on the upright extension 1042 of the welding strip 104. The pressure transmission path no longer passes through the second solar cell 102, and the second solar cell 102 does not directly bear the load of the welding head. This fundamentally avoids the problem of microcracks in the second solar cell 102 caused by mechanical stress, significantly improving the manufacturing yield of the photovoltaic module 100. In addition, the welding strip 104's The extension 1042 is located above the second cell 102. The extension 1042, which is erected by the solder ribbon 104, forms a physical isolation layer between the solder head and the second cell 102. The heat generated during the soldering process is mainly concentrated at the contact interface between the extension 1042 of the solder ribbon 104 and the busbar 103. The heat transfer path to the second cell 102 is significantly extended, and the thermal resistance increases. At the same time, the solder head no longer directly contacts the second cell 102, avoiding the direct thermal shock of local high temperature to the grid line tin layer, and fundamentally eliminating the phenomenon of secondary tinning.
[0046] In addition, since the welding strip 104 is usually made of copper or copper alloy, it has good toughness and mechanical strength and can withstand welding pressure without cracking.
[0047] In one alternative embodiment, the photovoltaic module 100 includes a battery string 106, the battery string 106 including a first battery cell 101 and a second battery cell 102 arranged sequentially along a first direction, the first battery cell 101 being located at the end of the battery string 106.
[0048] Further explanation: the method for manufacturing the photovoltaic module 100 also includes S05, which is located before S01 or between S01 and S02; in S05, the connecting segment 1041 is disposed on the first solar cell 101, and the extension segment 1042 is close to the second solar cell 102, wherein the first solar cell 101 and the second solar cell 102 are arranged adjacent to each other.
[0049] Specifically, the connecting segment 1041 is located on the first battery cell 101, and the extension segment 1042 is close to the second battery cell 102. This can be understood as the first battery cell 101 and the second battery cell 102 being in the same battery string 106; or, the first battery cell 101 and the second battery cell 102 being in two battery strings 106, that is, the two battery strings 106 are the first battery string 106a and the second battery string 106b, respectively. The end of the first battery string 106a close to the second battery string 106b is the first battery cell 101 of the first battery string 106a, and the end of the second battery string 106b close to the first battery string 106a is the second battery cell 102 of the second battery string 106b.
[0050] In one embodiment, S05 is located before S01. That is, the connecting section 1041 of the solder ribbon 104 is first placed on the first battery cell 101, and the extension section 1042 of the solder ribbon 104 extends to the second battery cell 102. Then, the extension section 1042 of the solder ribbon 104 is bent at a first preset angle away from the second battery cell 102. At this time, the extension section 1042 will have a certain angle with the second battery cell 102. Then, the busbar 103 is moved to the side of the extension section 1042 facing away from the extension section 1042 and towards the second battery cell 102. The busbar 103 also has a certain angle with the second battery cell 102. Therefore, when the busbar 103 is welded together with the extension section 1042 of the solder ribbon 104, it can avoid contact with the second battery cell 102, thereby preventing the second battery cell 102 from breaking.
[0051] In another embodiment, S05 is located between S01 and S02. That is, when the solder ribbon 104 is cut, the extension 1042 of the solder ribbon 104 can be bent at a first preset angle towards the connecting section 1041 by the solder ribbon cutting mechanism; then the connecting section 1041 is connected to the first battery cell 101. At this time, the extension 1042 is close to the second battery cell 102 and has a certain angle with the second battery cell 102. When the busbar 103 is welded together with the extension 1042 of the solder ribbon 104, it can avoid contact with the second battery cell 102, thereby preventing the second battery cell 102 from breaking.
[0052] In one specific embodiment, the first battery cell 101 and the second battery cell 102 abut against each other along the first direction.
[0053] In another specific embodiment, the first solar cell 101 and the second solar cell 102 partially overlap in the first direction, that is, the projections of the first solar cell 101 and the second solar cell 102 into the third direction partially overlap. In this embodiment, the gap between two adjacent solar cell strings 106 can be effectively reduced, and the effective space inside the photovoltaic module 100 can be fully utilized, thereby significantly improving the space utilization and photoelectric conversion efficiency of the photovoltaic module 100.
[0054] like Figure 8As shown, in one specific embodiment, the method for preparing the photovoltaic module 100 further includes step S06, which is located before step S01, between step S01 and step S02, and between step S02 and step S03 or between step S03 and step S04; in step S06, an insulating strip 105 is placed on the second solar cell 102, and in step S04, the busbar 103 is located between the insulating strip 105 and the second solar cell 102; specifically, in step S06, the insulating strip 105 is placed at one end of the second solar cell 102 near the first solar cell 101, and the insulating strip 105... The length direction is the same as that of the busbar 103. In S04, the extension 1042 of the solder ribbon 104 is bent at a second preset angle away from the connecting section 1041. That is, the extension 1042 of the solder ribbon 104 is bent at a second preset angle towards the second battery cell 102, so that the busbar 103 contacts the insulating strip 105. At this time, the insulating strip 105 is located between the busbar 103 and the second battery cell 102, thereby forming a stacked structure of the extension 1042 of the solder ribbon 104, the busbar 103 and the insulating strip 105, completing the fabrication of the hidden busbar 103 to facilitate subsequent lamination.
[0055] In another specific embodiment, the method for preparing the photovoltaic module further includes S06, which is located before S01 or between S01 and S02; in S06, the insulating strip 105 is connected to the busbar 103, and in S04, the busbar 103 is located between the insulating strip 105 and the second solar cell 102; specifically, in step S06, the insulating strip 105 is placed at one end of the second solar cell 102 near the first solar cell 101, and the insulating strip and the busbar 103 can be bonded together by heating; wherein, the length direction of the insulating strip 105 is the same as the length direction of the busbar 103.
[0056] In an optional embodiment, the method for manufacturing the photovoltaic module 100 further includes S07, which is located before S01, between S01 and S02, between S03 and S04, or after S04. In S07, the extension segment 1042 is bent at a third preset angle along the second direction, and the extension segment 1042 and the connecting segment 1041 are arranged at intervals along the second direction. Specifically, the extension segment 1042 is bent at a third preset angle along the second direction so that the extension segment 1042 and the connecting segment 1041 are arranged at intervals in the second direction. Since the extension segment 1042 is located on the second cell 102, the extension segment 1042 and the series solder strips 107 on the second cell 102 can be staggered, thereby avoiding the problem of stacking of the photovoltaic module 100 in the third direction, and thus avoiding stress concentration and poor contact caused by the superposition of solder strip thickness.
[0057] In one optional embodiment, the first preset angle is between 100° and 80°; preferably, the first preset angle is 90°, so that the extension 1042 of the welding strip 104 forms a vertical structure perpendicular to the surface of the second battery cell 102, so that the welding head of the welding mechanism 3 can weld the busbar 103 and the welding strip 104.
[0058] In one alternative embodiment, the busbar 103 and the extension 1042 are interconnected by welding, bonding, or coating.
[0059] Welding can be achieved through electromagnetic welding, thermal contact welding, or laser welding; bonding can be achieved through adhesive application followed by light curing.
[0060] In an optional embodiment, in S02, the busbar 103 is moved to the side of the extension section 1042 opposite to the connecting section 1041 by the transport mechanism 2, and the busbar 103 is abutted against the extension section 1042 by the fixing mechanism 1; specifically, after the busbar 103 is cut, the busbar 103 is transported to the side of the extension section 1042 opposite to the connecting section 1041 by the transport mechanism 2, and the busbar 103 is pressed against the extension section 1042 by the fixing mechanism 1, so that the welding mechanism 3 can weld the busbar 103 and the extension section 1042 together.
[0061] In one embodiment, the extension 1042 of the welding electrode is close to the welding mechanism 3, and the busbar 103 is close to the fixing mechanism 1. The welding mechanism 3 and the fixing mechanism 1 work together to press the busbar 103 against the extension 1042.
[0062] like Figures 1-3As shown, according to a second aspect of the embodiments of this application, a photovoltaic module 100 is provided, including a battery string, a busbar 103, and a plurality of solder strips 104. The battery string 106 includes a first battery cell 101 and a second battery cell 102 arranged sequentially along a first direction, with the first battery cell 101 located at the end of the battery string. The plurality of solder strips 104 are arranged at intervals along a second direction. Each solder strip 104 includes a connecting section 1041 and an extension section 1042 connected together. The solder strips 104 extend along the first direction, and the connecting section 1041 is connected to the first battery cell 101. The busbar 103 extends along the second direction and is disposed on one side of the extension section 1042. The first direction intersects the second direction.
[0063] Specifically, the connecting segment 1041 is located on the first battery cell 101, and the extension segment 1042 is close to the second battery cell 102. This can be understood as the first battery cell 101 and the second battery cell 102 being in the same battery string 106; or, the first battery cell 101 and the second battery cell 102 being in two battery strings 106, that is, the two battery strings 106 are the first battery string 106a and the second battery string 106b, respectively. The end of the first battery string 106a close to the second battery string 106b is the first battery cell 101 of the first battery string 106a, and the end of the second battery string 106b close to the first battery string 106a is the second battery cell 102 of the second battery string 106b.
[0064] like Figures 1-3 As shown, the photovoltaic module 100 also includes a busbar 103 and a plurality of solder ribbons 104. The plurality of solder ribbons 104 are arranged at intervals along a second direction, and the busbar 103 is connected to the plurality of solder ribbons 104. Specifically, each solder ribbon 104 includes an adjacent connecting segment 1041 and an extension segment 1042, and the connecting segment 1041 and the extension segment 1042 can be a single solder ribbon 104. The connecting segment 1041 of the solder ribbon 104 is connected to a first solar cell 101, and the extension segment 1042 of the solder ribbon 104 extends to a second solar cell 102. The busbar 103 is connected to the side of the extension segment 1042 of the solder ribbon 104 facing the second solar cell 102. That is, the busbar 103 is located between the second solar cell 102 and the extension segment 1042 of the solder ribbon 104. In this embodiment, the busbar 103 can be hidden behind the solar cell string to improve the screen-to-body ratio (i.e., full screen) of the photovoltaic module 100.
[0065] In an optional embodiment, the battery string 106 further includes a series solder strip 107, through which the first battery cell 101 and the second battery cell 102 are connected; specifically, the first battery cell 101 and the second battery cell 192 of the same battery string 106 are connected together by the series solder strip 107.
[0066] In one optional embodiment, the photovoltaic module 100 further includes an insulating strip 105, which is disposed on the second solar cell 102. The insulating strip 105 extends along the second direction, and the extension segment 1042, the busbar 103, and the insulating strip 105 are stacked in sequence. Specifically, the insulating strip 105 is disposed on the side of the second solar cell 102 near the first solar cell 101. The length direction of the insulating strip 105 is the same as the length direction of the busbar 103, both extending in the second direction. The insulating strip 105 is located between the busbar 103 and the second solar cell 102, that is, the extension segment 1042 of the solder ribbon 104, the busbar 103, and the insulating strip 105 are arranged in sequence.
[0067] like Figures 10-17 As shown, according to a third aspect of the embodiments of this application, a welding apparatus 200 is provided, including a welding mechanism 3, a fixing mechanism 1, and a transport mechanism 2; the fixing mechanism 1 includes at least one first fixing component 11, the first fixing component 11 including a first driving member 111 and a first fixing member 112, the first fixing member 112 being connected to the first driving member 111; the first fixing member 112 and the welding mechanism 3 are arranged along a first direction; the transport mechanism 2 is capable of being located between the first fixing member 112 and the welding mechanism 3.
[0068] The welding device 200 in this embodiment can be used to implement steps S02 and S03 in the method for preparing the photovoltaic module 100.
[0069] like Figures 10-17 As shown, the welding device 200 includes a welding mechanism 3, a fixing mechanism 1, and a transport mechanism 2; the fixing mechanism 1 includes at least one first fixing component 11, which can be understood as the fixing mechanism 1 including one first fixing component 11, two first fixing components 11, three first fixing components 11, or more than three first fixing components 11; when including two or more first fixing components 11, the two or more first fixing components 11 are arranged sequentially along the second direction.
[0070] like Figure 17 As shown, the first fixing component 11 includes a first driving member 111 and a first fixing member 112. The first fixing member 112 is connected to the first driving member 111. The first driving member 111 can drive the first fixing member 112 to move along a first direction. The welding mechanism 3 is arranged with the first fixing member 112 along the first direction. Therefore, the first driving member 111 can drive the first fixing member 112 to move towards or away from the welding mechanism 3.
[0071] like Figure 11As shown, further explained, along the first direction, the extension 1042 of the welding strip 104 can be located between the first fixing member 112 and the welding mechanism 3. The side of the extension 1042 facing the connecting section 1041 is close to the welding mechanism 3, and the side of the extension 1042 away from the connecting section 1041 is close to the first fixing member 112. The conveying mechanism 2 can convey the busbar 103 to the side of the extension 1042 away from the connecting section 1041, that is, the busbar 103 is close to the first fixing member 112. The first driving member 111 drives the first fixing member 112 to move closer to the busbar 103 so that the first fixing member 112 contacts the busbar 103 so that the busbar 103 is pressed against the connecting section 1041 of the welding strip 104. Since the welding mechanism 3 is located on the side of the extension 1042 facing the connecting section 1041, the extension 1042 of the welding strip 104 and the busbar 103 can be welded together by the welding mechanism 3.
[0072] In this embodiment, the welding device 200, through the fixing mechanism 1 and the welding mechanism 3, can weld the busbar 103 and the welding strip 104 together when the welding strip 104 is in an upright state.
[0073] In one alternative embodiment, the conveying mechanism 2 is configured to move the busbar 103 to the side of the extension 1042 of the welding strip 104 facing away from the connecting section 1041; the first driving member 111 is capable of driving the first fixing member 112 to move toward the welding mechanism 3 to press the busbar 103 against the extension 1042; the welding mechanism 3 is configured to weld the busbar 103 and the extension 1042 together.
[0074] like Figure 17 As shown, in an optional embodiment, the first fixing member 112 includes at least one first fixing shaft 1122. This can be understood as the first fixing member 112 including one first fixing shaft 1122, two first fixing shafts 1122, three first fixing shafts 1122, or more than three first fixing shafts 1122. In the case where the first fixing member 112 includes two or more first fixing shafts 1122, the two or more first fixing shafts 1122 are spaced apart along the second direction.
[0075] like Figure 11 and Figure 13As shown, the conveying mechanism 2 further includes a conveying assembly 21, which includes a mounting member 211 and at least one adsorption member 212. The adsorption member 212 is disposed on the mounting member 211. Specifically, the fact that the conveying assembly 21 includes at least one adsorption member 212 can be understood as the conveying assembly 21 including one adsorption member 212, two adsorption members 212, three adsorption members 212, or more than three adsorption members 212. In the case where the conveying assembly 21 includes two or more adsorption members 212, the two or more adsorption members 212 are spaced apart on the mounting member 211 along the second direction. like Figure 11 and Figure 13 As shown, the mounting component 211 is provided with at least one through groove 2111 having an opening 2112. The number of through grooves 2111 may be the same as or different from the number of the first fixed shafts 1122.
[0076] Further explanation: The conveying assembly 21 includes a first position. In the first position, the opening 2112 faces upward in the third direction, the adsorption member 212 faces the welding mechanism 3, and the first fixed shaft 1122 can be arranged corresponding to the through groove 2111 in the first direction. The third direction intersects with the first direction. Specifically, when the conveying assembly 21 is in the first position, the busbar 103 is conveyed to the side of the extension 1042 of the welding strip 104 facing away from the connecting section 1041. The adsorption member 212 will adsorb the busbar 103, and the busbar 103 will abut against the extension 1042. In the first position, the opening 2112 of the through groove 2111 faces upward in the third direction. The through groove 2111 will penetrate the mounting member 211 in the first direction. The first driving member 111 can drive the first fixed shaft 1122 to pass through the through groove 2111 and abut against the busbar 103, and press the busbar 103 against the extension 1042 of the welding strip 104.
[0077] The first fixing member 112 is used to pre-fix both ends of the busbar 103. By opening a through groove 2111 on the mounting member 211, the first fixing member 112 can pass through the mounting member 211 to pre-fix the busbar 103. This can press each welding strip 104 and the busbar 103 onto the welding mechanism 3, thereby improving the welding effect of the welding strip 104 and the busbar 103, and preventing interference with the first fixing member 112 when the handling component 21 is removed.
[0078] like Figure 17As shown, in an optional embodiment, the first fixing member 112 further includes a first connecting plate 1121, which is connected to the first driving member 111. The first connecting plate 1121 has at least one clearance groove 11212. The first fixing member 112 includes at least two first fixing shafts 1122, which are respectively disposed on both sides of the clearance groove 11212. Specifically, the clearance groove 11212 penetrates the first connecting plate 1121 in a first direction. One clearance groove 11212, two clearance grooves 11212, or more than two clearance grooves 11212 can be formed on the first connecting plate 1121. When more than two clearance grooves 11212 are formed, the more than two clearance grooves 11212 are spaced apart along a second direction.
[0079] To further explain, the first fixing member 112 includes at least two first fixing shafts 1122. In this embodiment, the number of first fixing shafts 1122 is related to the number of clearance grooves 11212. The number of first fixing shafts 1122 is one more than the number of clearance grooves 11212. Taking the example of the first connecting plate 1121 having one clearance groove 11212 and the first fixing member 112 including two first fixing shafts 1122, the two first fixing shafts 1122 are arranged at intervals along the first direction, and the two first fixing shafts 1122 are respectively located on both sides of the clearance groove 11212 in the first direction.
[0080] Further explanation: the fixing mechanism 1 also includes at least one second fixing component 12. The second fixing component 12 is disposed on the side of the first connecting plate 1121 facing away from the welding mechanism 3. The second fixing component 12 includes a second driving member 121 and a second fixing member 122. The second fixing member 122 is connected to the second driving member 121, and at least a portion of the second fixing member 122 corresponds to the clearance groove 11212. The fixing mechanism 1 including at least one second fixing component 12 can be understood as including one, two, three, or more second fixing components 12. When including two or more second fixing components 12, the two or more second fixing components 12 are arranged sequentially along the first direction, with one second fixing component 12 corresponding to one first fixing component 11. Therefore, the number of first fixing components 11 is the same as the number of second fixing components 12.
[0081] More specifically, the second fixing component 12 includes a second driving member 121 and a second fixing member 122. The second fixing member 122 is connected to the second driving member 121. The second driving member 121 can drive the second fixing member 122 to move in a first direction toward or away from the welding mechanism 3. At least a portion of the second fixing member 122 corresponds to the clearance groove 11212. Therefore, the second fixing member 122 can pass through the clearance groove 11212 and abut against the busbar 103. That is, the second fixing shaft 1222 passes through the clearance groove 11212 and abuts against the busbar 103, thereby improving the fixing effect between the welding strip 104 and the busbar 103.
[0082] The second fixing member 122 includes a second connecting plate 1221 and a plurality of second fixing shafts 1222. The second connecting plate 1221 is connected to the second driving member 121, and the plurality of second fixing shafts 1222 are spaced apart on the second connecting plate 1221.
[0083] In one alternative embodiment, the conveying mechanism 2 further includes a second drive component, the conveying component 21 being connected to the second drive component.
[0084] In a first embodiment, the second driving component includes a rotating member, and the conveying component 21 is connected to the rotating member. The rotating member can drive the conveying component 21 to rotate about an axis in a first direction. Specifically, the mounting member 211 of the conveying component 21 is connected to the rotating member, and the rotating member can drive the mounting member 211 to rotate about an axis in the first direction, thereby enabling the conveying component 21 to be located in a first position or a second position. When the conveying component 21 is located in the second position, the opening 2112 of the through groove 2111 faces the first direction, and the adsorption member 212 faces downward in the third direction. In this embodiment, when the rotating member drives the conveying component 21 to the second position, the adsorption member 212 can adsorb the cut manifold 103. When the rotating member drives the conveying component 21 to rotate from the second position to the first position, the manifold 103 is erected by rotating the conveying component 21, so as to facilitate the contact between the manifold 103 and the extension 1042 of the welding strip 104.
[0085] The term "vertical" in this context refers to the fact that the busbar 103 has a first surface and a second surface. When the busbar 103 is cut and ready for use, the first surface of the busbar 103 faces upward in a third direction, and the second surface of the busbar 103 faces downward in a third direction. The adsorption member 212 adsorbs the first surface of the busbar 103, and the rotating member drives the conveying assembly 21 to rotate around the axis of the first direction, so that the second surface of the busbar 103 faces the first direction (that is, the busbar 103 is vertical). The second surface of the busbar 103 abuts against the extension 1042 of the welding strip 104.
[0086] In the second embodiment, the second driving component includes a third driving member, and the transport component 21 is connected to the third driving member. The third driving member can drive the transport component 21 to move along a third direction. In this embodiment, the adsorption member 212 of the transport component 21 is always facing the first direction, and the third driving member can drive the transport component 21 to move along a third direction, so that the adsorption member 212 of the transport component 21 can be located between the welding mechanism 3 and the fixing mechanism 1. Specifically, the busbar 103 can be moved onto the transport component 21 by the transfer mechanism, and the first surface of the busbar 103 can be adsorbed by the adsorption member 212. Then, the third driving member drives the transport component 21 to move between the welding mechanism 3 and the fixing mechanism 1, so that the busbar 103 contacts the extension 1042 of the welding strip 104.
[0087] In the third embodiment, the second driving component includes a rotating component and a third driving component. The conveying component 21 is connected to the third driving component, and the third driving component is connected to the rotating component. The third driving component can drive the conveying component 21 to move along a third direction, and the rotating component can drive the conveying component 21 and the third driving component to rotate together about an axis in a first direction. In this embodiment, the rotating component drives the third driving component and the conveying component 21 to rotate between a first position and a second position. When the rotating component drives the conveying component 21 to be in the first position, the third driving component can drive the conveying component 21 to move along a third direction. When the rotating component drives the conveying component 21 to be in the second position, the third driving component can drive the conveying component 21 to move along the first direction.
[0088] In the fourth embodiment, the second driving component includes a rotating component and a third driving component. The conveying component 21 is connected to the rotating component, and the rotating component is connected to the third driving component. The rotating component can drive the conveying component 21 to rotate around the axis of the first direction, and the third driving component can drive the conveying component 21 and the rotating component to move along the first direction or a third direction. In this embodiment, when the conveying component 21 is driven to rotate from the second position to the first position by the rotating component, the busbar 103 is erected by rotating the conveying component 21. The conveying component 21 is driven to move along a third direction by the third driving component, so that the adsorption component 212 can move between the welding structure and the fixing mechanism 1, thereby abutting the extension 1042 of the weld strip 104 of the busbar 103 located on the adsorption component 212.
[0089] In one optional embodiment, the welding mechanism 3 includes a third driving component and a welding component 31. The welding component 31 is connected to the third driving component. The third driving component can drive the welding component 31 to move along a first direction. This can be understood as the third driving component being able to drive the welding component 31 to move along the first direction toward or away from the fixed mechanism 1. Since the extension 1042 of the welding strip 104 is located between the fixed mechanism 1 and the welding mechanism 3, it also drives the welding component 31 to move toward or away from the welding strip 104.
[0090] In an optional embodiment, the welding apparatus 200 further includes a frame 4 and a drive mechanism 5. The fixing mechanism 1 is mounted on the frame 4, and the frame 4 is connected to the drive mechanism 5. The drive mechanism 5 is capable of driving the frame 4 and the fixing mechanism 1 to move in a third direction.
[0091] According to a fourth aspect of the embodiments of this application, a string welding machine is provided, including the welding apparatus 200 described above.
[0092] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.
Claims
1. A method for preparing a photovoltaic module, characterized in that, include: S01, the welding strip includes an extension section and a connecting section connected together, and the extension section is bent toward the connecting section at a first preset angle; S02, move the busbar to one side of the extension section, the length direction of the welding strip is the first direction, the length direction of the busbar is the second direction, and the first direction intersects the second direction; S03, connect the busbar to the extension section; S04, bend the extension segment to the side opposite to the connecting segment at a second preset angle.
2. The method for preparing a photovoltaic module according to claim 1, characterized in that, The photovoltaic module includes a battery string, which includes a first battery cell and a second battery cell arranged sequentially along a first direction, with the first battery cell located at the end of the battery string; The method for preparing the photovoltaic module further includes S05, wherein S05 is located before S01 or between S01 and S02; In step S05, the connecting segment is located on the first battery cell, and the extension segment is located near the second battery cell.
3. The method for preparing a photovoltaic module according to claim 2, characterized in that, The first battery cell and the second battery cell abut against each other along the first direction or partially overlap in the first direction.
4. The method for preparing a photovoltaic module according to claim 2, characterized in that, The method for preparing the photovoltaic module further includes S06, wherein S06 is located before S01, between S01 and S02, or between S02 and S03 or between S03 and S04; In step S06, the insulating strip is placed on the second battery cell. In step S04, the busbar is located between the insulating strip and the second battery cell.
5. The method for preparing a photovoltaic module according to claim 2, characterized in that, The method for preparing the photovoltaic module further includes S06, wherein S06 is located before S01 or between S01 and S02; In step S06, the insulating strip is connected to the busbar. In step S04, the busbar is located between the insulating strip and the second battery cell.
6. The method for preparing a photovoltaic module according to claim 1, characterized in that, The method for preparing the photovoltaic module further includes S07, wherein S07 is located before S01, between S01 and S02, between S03 and S04, or after S04; In step S07, the extension segment is bent at a third preset angle along the second direction, and the extension segment and the connecting segment are arranged at intervals along the second direction.
7. The method for preparing a photovoltaic module according to claim 1, characterized in that, The first preset angle is between 100° and 80°.
8. The method for preparing a photovoltaic module according to claim 1, characterized in that, The busbar and the extension are interconnected by welding, bonding or coating.
9. The method for preparing a photovoltaic module according to claim 1, characterized in that, In step S02, the busbar is moved to the extension section by a conveying mechanism, and the busbar is brought into contact with the extension section by a fixing mechanism.
10. A photovoltaic module, characterized in that, The photovoltaic module includes: A battery string, the battery string including a first battery cell and a second battery cell arranged sequentially along a first direction, the first battery cell being located at the end of the battery string; The busbar and a plurality of solder strips are arranged at intervals along a second direction. Each solder strip includes a connected connecting section and an extension section. The solder strip extends along a first direction. The connecting section is connected to the first battery cell. The busbar extends along a second direction and is disposed on one side of the extension section. The first direction intersects with the second direction.
11. The photovoltaic module according to claim 10, characterized in that, The battery string also includes a series welding strip, through which the first battery cell and the second battery cell are connected.
12. The photovoltaic module according to claim 10, characterized in that, The photovoltaic module also includes an insulating strip, which is disposed on the second cell and extends along the second direction. The extension section, the busbar, and the insulating strip are stacked in sequence.
13. A welding apparatus, characterized in that, include: A fixing mechanism, the fixing mechanism including at least one first fixing component, the first fixing component including a first driving member and a first fixing member, the first fixing member being connected to the first driving member; A welding mechanism, wherein the welding mechanism and the first fixing member are arranged along a first direction; A transport mechanism, which can be located between the first fixing member and the welding mechanism.
14. The welding apparatus according to claim 13, characterized in that, The conveying mechanism is configured to move the busbar to one side of the extension of the welding strip; The first driving member can drive the first fixing member to move toward the welding mechanism to press the busbar against the extension section; The welding mechanism is configured to weld the busbar to the extension.
15. The welding apparatus according to claim 13, characterized in that, The first fastener includes at least one first fixed shaft; The conveying mechanism includes a conveying component, which includes a mounting component and at least one suction component. The suction component is disposed on the mounting component, and the mounting component has at least one through slot with an opening. The conveying assembly includes a first position, in which the opening faces upward in a third direction, the adsorption member faces the welding mechanism, and the first fixed shaft and the through groove are arranged correspondingly along a first direction; The third direction intersects with the first direction.
16. The welding apparatus according to claim 15, characterized in that, The first fixing member further includes a first connecting plate, which is connected to the first driving member. The first connecting plate has at least one clearance groove. The first fixing member includes at least two first fixing shafts, which are respectively disposed on both sides of the clearance groove. The fixing mechanism further includes at least one second fixing component, which is disposed on the side of the first connecting plate facing away from the welding mechanism. The second fixing component includes a second driving member and a second fixing member, which is connected to the second driving member. At least a portion of the second fixing member corresponds to the clearance groove.
17. The welding apparatus according to claim 13, characterized in that, The conveying mechanism also includes a second drive component; The second drive assembly includes a rotating component, and the conveying assembly is connected to the rotating component; or The second drive assembly includes a third drive member, and the conveying assembly is connected to the third drive member, the third drive member being capable of driving the conveying assembly to move in a third direction; or The second drive assembly includes a rotating component and a third drive component, the conveying assembly is connected to the third drive component, and the third drive component is connected to the rotating component; or The second drive assembly includes a rotating component and a third drive component, the conveying assembly is connected to the rotating component, and the rotating component is connected to the third drive component.
18. The welding apparatus according to claim 13, characterized in that, The welding mechanism includes a third drive component and a welding component, wherein the welding component is connected to the third drive component.
19. A string welding machine, characterized in that, Includes the welding apparatus as described in any one of claims 13-18.