A busbar folding device

Abstract

The application relates to the technical field of photovoltaic module production equipment, in particular to a busbar folding device which comprises a base, a fixing table, a turnover table, a driving piece, a first gear, a second gear and a connecting rod; the fixing table is arranged on the base and extends along a first direction; the turnover table is located on the first side of the fixing table and extends along the first direction; the driving piece drives the turnover table to rotate relative to the fixing table through the first gear, the second gear and the connecting rod, so that the busbar on the bearing surface of the turnover table can be turned to the upper side of the battery string group on the supporting surface of the fixing table. The driving piece drives the turnover table to rotate through the first gear, the second gear and the connecting rod; due to the small meshing side gap and small pitch error between the gears, the motion can be strictly transmitted according to the transmission ratio, the idle stroke and position lag are reduced, and the start-stop position of the turnover table is more accurate; the rigid transmission characteristics of the gears and the stable stress of the connecting rod can further reduce error fluctuation and improve the precision stability of the turnover table.

Description

Technical Field

[0001] This application relates to the field of photovoltaic module production equipment technology, and in particular to a busbar folding device. Background Technology

[0002] In the solar cell manufacturing process, busbars need to be welded to the long solder strips at the ends of the cell string assembly. The cell string assembly is formed by arranging a certain number of cell strings according to the photovoltaic module layout requirements; each cell string is formed by connecting a certain number of solar cells together via solder strips. For example... Figure 1 As shown, because the busbar 200 is located on the outside of the end battery cells of the battery string 100 after welding, the area of ​​the battery string 100 with the busbar 200 welded thereon is relatively large. To address this issue, existing technologies typically use a busbar folding device to flip the busbar 200 at the end of the battery string 100 to the upper side of the battery string 100.

[0003] Existing busbar flipping devices generally include a fixed platform for supporting the end of the battery string and a flipping platform for supporting the busbar. A drive unit is connected to the flipping platform via a transmission assembly consisting of a rotating shaft and several connecting rods, enabling the drive unit to drive the flipping platform to flip, thus flipping the busbar at the end of the battery string to the upper side of the battery string. However, in actual use, the transmission assembly consisting of the rotating shaft and several connecting rods suffers from a combination of factors, including clearances in the moving parts causing backlash and positional deviations, accumulated machining and form and position errors from multiple stages, and differences in elastic deformation caused by load variations. These factors make it difficult to achieve high-precision control of the flipping platform, resulting in poor accuracy in the busbar flipping position. Utility Model Content

[0004] (a) The problem to be solved by this application is that the existing busbar flipping device is difficult to achieve high-precision control, resulting in poor accuracy of the busbar flipping position.

[0005] (II) Technical Solution To solve the above-mentioned technical problems, this application provides a busbar flipping device, which is used to flip the busbar on the extended welding strip welded to the end of the battery string to the upper side of the battery string. The busbar flipping device includes: a base, a fixed platform, a flipping platform, a driving component, a first gear, a second gear, and a connecting rod. A fixed platform is mounted on a base and extends along a first direction; a tilting platform is located on the first side of the fixed platform and extends along the first direction; a driving component is connected to a first gear, and a second gear meshes with the first gear; one end of a connecting rod is eccentrically and rotatably mounted on the second gear, and the other end of the connecting rod is rotatably mounted on the tilting platform; the driving component drives the first gear to rotate, thereby driving the second gear and the connecting rod to move, so that the tilting platform can rotate relative to the fixed platform. When the flipping platform rotates away from the fixed platform to the support position, the bearing surface of the flipping platform and the support surface of the fixed platform are on the same horizontal plane. The support surface of the fixed platform is used to support the end of the battery string, and the bearing surface of the flipping platform is used to support the busbar. When the flipping platform rotates toward the fixed platform to the flipping position, the bearing surface of the flipping platform is above the support surface of the fixed platform, and the busbar is flipped to the upper side of the battery string.

[0006] During operation, the drive unit drives the first gear to rotate, and the second gear, which meshes with the first gear, rotates synchronously. The connecting rod begins to move with the rotation of the second gear, thereby driving the tilting table to rotate. The tilting table is driven to rotate by a transmission module composed of the first gear, the second gear, and the connecting rod. Compared to existing technologies that use a transmission assembly consisting of a shaft and several connecting rods, the meshing backlash between the first and second gears is much smaller than the hinge gap of multiple connecting rods, and the pitch error is extremely small. This allows for precise transmission of motion according to the transmission ratio, significantly reducing backlash and position lag, resulting in more accurate start and stop positions for the tilting table. Simultaneously, the rigid transmission characteristics of the first and second gears, combined with the stable force distribution of the connecting rod, further reduce error fluctuations and significantly improve the accuracy and stability of the tilting table.

[0007] Optionally, a first connecting shaft is fixedly provided at the end of the second gear near its meshing teeth. The first connecting shaft passes through the second gear and its two ends protrude from the two end faces of the second gear, respectively. Two connecting rods are configured, and the ends of the two connecting rods away from the tilting table are rotatably mounted on the two ends of the first connecting shaft, respectively.

[0008] By setting two connecting rods, it is possible to ensure that the tilting table is subjected to uniform force, reduce eccentric load, and improve the overall structural rigidity and stability; at the same time, it is also possible to ensure the synchronization of the two ends when the tilting table rotates.

[0009] Optionally, the busbar folding device may also include several concealed hinges; The first side of the fixed platform is provided with a number of first mounting slots at intervals along the first direction, and the flipping platform is provided with a number of second mounting slots at intervals along the first direction. The concealed hinge, the first mounting slot and the second mounting slot are provided in a one-to-one correspondence. One end of the concealed hinge is fixedly installed in the corresponding first mounting slot and the other end is fixedly installed in the corresponding second mounting slot.

[0010] Mounting the tilting table to the first side of the fixed platform via a concealed hinge facilitates positioning of the tilting table, improves installation accuracy, and reduces wobbling or offset during rotation. The concealed hinge is integrated into both the fixed platform and the tilting table via first and second mounting slots, minimizing internal space occupation and resulting in a cleaner, easier-to-clean appearance and maintenance. The direct connection between the fixed platform and the tilting table via the concealed hinge eliminates movement offsets caused by assembly errors of multiple components, ensuring a more stable rotation center and precise control of the tilting angle.

[0011] Optionally, a limit block is also provided on the first side of the fixed platform, and the limit block protrudes from the first side of the fixed platform; When the tilting table rotates away from the fixed table to the support position, the first side of the tilting table abuts against the limiting block so that the bearing surface and the support surface can be on the same horizontal plane.

[0012] The limit block limits the tilting table, ensuring that the bearing surface and the support surface are on the same horizontal plane, thus preventing damage caused by the end of the busbar or battery string being suspended.

[0013] Optionally, the tilting table includes a table body and a sliding plate; the table body is rotatably mounted on the first side of the fixed table, and the sliding plate is slidably disposed on the table body along a first direction, and the sliding plate has a bearing surface.

[0014] The sliding plate drives the busbar to slide along the first direction, causing the busbar to be misaligned relative to the end of the battery string in the first direction. Consequently, the extended solder strip where the busbar is located also becomes misaligned with the solder strip on the upper surface of the end battery cell. When the flipping table flips the busbar to the top of the battery string, the extended solder strip will not stack on the solder strip on the upper surface of the end battery cell, thus preventing short circuits when the battery string assembly is powered on. It also avoids excessive stress at the solder strip stack during subsequent lamination of the battery string, which could damage the battery cell.

[0015] Optionally, the sliding plate also has a first side surface adjacent to the bearing surface, and a heating element extending in a first direction is disposed on the first side surface of the sliding plate.

[0016] The heating element can heat the busbar, connecting the busbar to the insulating film. Placing the heating element on the first side of the sliding plate can prevent damage to the insulating film due to overheating.

[0017] Optionally, a receiving cavity is formed between the base, the fixed platform, and the tilting platform; The driving component is fixedly installed in the accommodating cavity. The first gear is rotatably installed in the accommodating cavity. The second gear is a sector gear, which is located in the accommodating cavity and rotatably installed on the first side of the fixed platform.

[0018] The drive components, first gear, and second gear are centrally housed in a accommodating cavity and isolated from the outside, avoiding space waste caused by scattered components, making the space more compact and highly integrated; at the same time, it can effectively prevent external impurities from damaging the components, providing strong protection and effectively extending the service life of the components. The second gear adopts a sector gear, which can better adapt to the flipping action requirements of the tilting table, and can reduce space occupation and improve the compactness of the mechanism.

[0019] Optionally, a groove is provided on the first side of the fixed platform, and a second connecting shaft is mounted in the groove. A through hole is provided on the second gear away from its meshing teeth, and the second connecting shaft is mounted in the groove through the through hole of the second gear.

[0020] The groove forms a wrapping support for the second connecting shaft, which can limit the radial displacement of the second connecting shaft and has a stronger constraint force. Moreover, placing the first connecting shaft in the groove can reduce the height of the fixed platform and reduce the size of the second gear, thereby optimizing the spatial layout and making the device structure more compact.

[0021] Optionally, the busbar folding device also includes an adsorption component and a vacuum generating mechanism. An adsorption component is provided on the fixed platform. The adsorption component is a suction cup or an adsorption hole. The vacuum generating mechanism is connected to the adsorption component. The vacuum generating mechanism is located in the accommodating cavity and is located on the first side of the second gear. The driving component is located on the second side of the second gear. The first side and the second side of the second gear are arranged opposite to each other. The fixed platform adsorbs the battery string onto the support surface through the adsorption component. And / or, a buffer layer of flexible material is provided on the support surface.

[0022] The battery string is adsorbed onto the support surface by vacuum negative pressure, preventing displacement or shaking of the battery string during busbar flipping and ensuring positioning accuracy in the flipping process. The vacuum generating mechanism is housed within the accommodating cavity, protecting it. The vacuum generating mechanism and the drive component are located on opposite sides of the second gear, fully utilizing the space within the accommodating cavity and avoiding space waste caused by structural stacking, resulting in a more compact device structure. A buffer layer fills the gap between the battery string and the support surface, ensuring the airtightness of the vacuum adsorption and enhancing the fixing effect; it also provides a certain degree of cushioning, preventing damage to the battery string during busbar flipping.

[0023] Optionally, the busbar folding device also includes a rotary drive, with a base fixedly mounted on the drive end of the rotary drive. The rotary drive is configured to drive the base to rotate in a horizontal plane so that the flipping table and the fixed table can be parallel to the end edge of the battery string.

[0024] Both the flipping platform and the fixing platform are adjusted to be parallel to the end edge of the battery string to prevent the flipping platform from colliding with the end battery cells during the flipping process, which could cause microcracks or breakage of the battery cells. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of a battery string assembly with welded busbars; Figure 2 A partial schematic diagram of the battery string assembly after the busbars have been welded. Figure 3 A partial schematic diagram showing the busbars on the battery string assembly being flipped to the top of the battery string assembly; Figure 4 This diagram illustrates the positional relationship between the busbar folding device and the battery string after the busbars have been welded, as provided in the embodiments of this application. Figure 4 In the middle, the flipping table is located in the support position, the end of the battery string is supported on the support surface, and the busbar at the end of the battery string is supported on the bearing surface; Figure 5 This diagram illustrates the positional relationship between the busbar folding device and the battery string after the busbars have been welded, as provided in the embodiments of this application. Figure 5 In the middle, the flipping table is in the flipped position, the bearing surface is above the support surface, and the busbar at the end of the battery string is flipped to the upper side of the battery string. Figure 6 This is a schematic diagram of the structure of the busbar folding device provided in the embodiments of this application. Figure 6 In the middle, the tilting table is located in the support position; Figure 7 This is a schematic diagram of the structure of the busbar folding device provided in the embodiments of this application. Figure 7 In the middle, the tilt table is in the tilt position; Figure 8 This is a schematic diagram of the internal structure of the busbar folding device provided in the embodiments of this application. Figure 8 In the middle, the tilting table is located in the support position; Figure 9 An exploded view of a portion of the busbar flipping device provided in an embodiment of this application; Figure 10 This is a schematic diagram of the internal structure of the busbar folding device provided in the embodiments of this application. Figure 10 In the middle, the tilt table is in the tilt position; Figure 11 An exploded view from a second perspective of a portion of the busbar flipping device structure provided in an embodiment of this application; Figure 12 A schematic diagram of the internal structure of a busbar folding device with a heating element provided in an embodiment of this application; Figure 13 Exploded view of a busbar folding device with heating element provided in an embodiment of this application; Figure 14 This is a diagram showing the positional relationship between the flip table and the limit block.

[0027] Icons: 100 - Battery string; 101 - End cell; 200 - Busbar; 300 - Solder strip; 301 - Extended solder strip; 400-Busbar folding device; 410-Base; 411-Accommodation cavity; 420-Fixing platform; 421-First mounting slot; 422-Groove; 423-Supporting surface; 430-Flipping platform; 431-Second mounting slot; 432-Platform body; 433-Sliding plate; 434-Slider; 435-Slide rail; 436-Bearing surface; 441-Drive component; 442-First gear; 443-Second gear; 444-Connecting rod; 445-First connecting shaft; 446-Second connecting shaft; 450-Hidden hinge; 460-Limiting block; 470-Vacuum generating mechanism; 480-Adsorption assembly; 490-Heating element. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0030] 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 further defined and explained in subsequent figures.

[0031] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" 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 application based on the specific circumstances.

[0034] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0035] This application provides a busbar folding device 400, which is used to flip the busbar 200 welded to the end of the battery string 100 with an extended welding strip 301 upwards to the upper side of the battery string 100; Figure 2 The image shows two end cells 101 of the battery string assembly 100 after the busbar 200 has been welded, as shown. Figure 2 As shown, the busbar 200 is located on the outer side of the end battery cell 101. Figure 3 As shown, after being folded by the busbar folding device 400 of this application, the busbar 200 flips upward to the upper side of the end battery cell 101.

[0036] It should be noted here that "excess solder ribbon 301" refers to the portion of the solder ribbon 300 welded and / or bonded to the end cell 101 that extends outward from the end cell 101. The excess solder ribbon 301 can be formed by the solder ribbon 300 welded and / or bonded to the upper surface of the end cell 101 extending outward, or it can be formed by the solder ribbon 300 welded and / or bonded to the lower surface of the end cell 101 extending outward. Figure 2 Taking the two end battery cells 101 shown as an example, the end of the welding ribbon 300 welded and / or bonded to its upper surface of the end battery cell 101 located on the upper right extends outward from the end battery cell 101, forming a long welding ribbon 301; the end of the welding ribbon 300 welded and / or bonded to its lower surface of the end battery cell 101 extends outward from the end battery cell 101, forming a long welding ribbon 301; the busbar 200 is welded to the long welding ribbons 301 of the two end battery cells 101.

[0037] like Figures 4 to 14As shown, the busbar folding device 400 in this embodiment includes: a base 410, a fixed platform 420, a flipping platform 430, a driving member 441, a first gear 442, a second gear 443, and a connecting rod 444. The base 410 is the main support structure of the busbar folding device 400; the fixed platform 420 can be fixedly installed on the base 410 by bolts or welding, and the fixed platform 420 extends along a first direction; the flipping platform 430 is located on the first side of the fixed platform 420, and the flipping platform 430 extends along the first direction; the driving member 441 can be a motor, or a motor equipped with a reducer; the first gear 442 is fixedly installed on the output end of the driving member 441, the second gear 443 meshes with the first gear 442, one end of the connecting rod 444 is rotatably installed on the second gear 443, and the connecting rod 444 and the second gear 443 are eccentrically arranged, and the other end of the connecting rod 444 is rotatably installed on the flipping platform 430 through a rotating shaft. In use, the drive unit 441 drives the first gear 442 to rotate, and the second gear 443, which meshes with the first gear 442, rotates. Under the action of the second gear 443, the connecting rod 444 moves, thereby enabling the tilting table 430 to rotate relative to the fixed table 420. The flipping platform 430 can rotate away from the fixed platform 420 to the support position. When the flipping platform 430 is in the support position, the bearing surface 436 of the flipping platform 430 and the support surface 423 of the fixed platform 420 are on the same horizontal plane. The support surface 423 of the fixed platform 420 is used to support the end of the battery string 100 (the end of the battery string 100 is the end of the end battery cell 101 with the extended welding strip). The bearing surface 436 of the flipping platform 430 is used to support the busbar 200. The flipping platform 430 can rotate toward the fixed platform 420 to the flipping position. When the flipping platform 430 is in the flipping position, the bearing surface 436 of the flipping platform 430 is above the support surface 423 of the fixed platform 420. After the flipping platform 430 rotates from the support position to the flipping position, the busbar 200 located on the bearing surface 436 of the flipping platform 430 is flipped to the top of the battery string 100.

[0038] In this application, the drive component 441 drives the tilting table 430 to rotate through a transmission module composed of a first gear 442, a second gear 443, and a connecting rod 444. Compared with the prior art, which uses a transmission assembly composed of a rotating shaft and several connecting rods, the meshing backlash between the first gear 442 and the second gear 443 is much smaller than the hinge gap of the multi-link, and the pitch error is extremely small. This allows the motion to be transmitted strictly according to the transmission ratio, significantly reducing backlash and position lag, and making the start and stop positions of the tilting table 430 more accurate. At the same time, the rigid transmission characteristics of the first gear 442 and the second gear 443, combined with the stable force of the connecting rod 444, can further reduce error fluctuations and significantly improve the accuracy and stability of the tilting table 430.

[0039] Furthermore, since gear transmission has a shorter motion transmission path, a more concentrated structure, and no redundant degrees of freedom, the transmission module composed of the first gear 442, the second gear 443, and the connecting rod 444 occupies less space, thereby improving space utilization, making the device more compact and smaller in size, easier to arrange, and also reducing costs.

[0040] In optional implementations of this application, such as Figure 9 , Figure 10 and Figure 12 As shown, a first connecting shaft 445 is fixedly installed at the end of the second gear 443 near its meshing teeth. The first connecting shaft 445 passes through the second gear 443, and its two ends protrude from the two end faces of the second gear 443, respectively. Two connecting rods 444 are configured, with the ends of the two connecting rods 444 facing away from the tilting table 430 respectively rotatably mounted at the two ends of the first connecting shaft 445. By setting two connecting rods 444, it is possible to ensure that the tilting table 430 is subjected to uniform force, reduce eccentric load, and improve the overall structural rigidity and stability; at the same time, it is also possible to ensure the synchronicity of the two ends when the tilting table 430 rotates.

[0041] In other alternative embodiments, the connecting rod 444 and the second gear 443 can also be rotatably connected by a spherical bearing, or a pin fixedly connected to the connecting rod 444 can be provided at the end of the connecting rod 444 and rotatably mounted on the second gear 443; all of the above methods can achieve the purpose of rotatably connecting the connecting rod 444 and the second gear 443 in this embodiment.

[0042] In an optional embodiment of this application, the tilting table 430 is rotatably mounted on the first side of the fixed table 420. For example... Figure 5 , Figure 7 , Figure 9 , Figure 10 , Figure 11 and Figure 13 As shown, the busbar folding device 400 also includes several concealed hinges 450; the first side of the fixed platform 420 is provided with several first mounting slots 421 spaced apart along the first direction, and the flipping platform 430 is provided with several second mounting slots 431 spaced apart along the first direction; the number of concealed hinges 450, first mounting slots 421 and second mounting slots 431 are arranged in a one-to-one correspondence. One end of the concealed hinge 450 can be fixedly installed in the corresponding first mounting slot 421 by screws or welding, and the other end of the concealed hinge 450 can be fixedly installed in the corresponding second mounting slot 431 by screws or welding.

[0043] In this embodiment, the tilting table 430 is mounted on the first side of the fixed platform 420 via a concealed hinge 450, which facilitates the positioning of the tilting table 430, improves installation accuracy, and reduces wobbling or offset during the rotation of the tilting table 430. By setting the first mounting slot 421 and the second mounting slot 431 to install the concealed hinge 450, the concealed hinge 450 can be integrated into the interior of the fixed platform 420 and the tilting table 430, reducing the space occupied inside the device, making the overall appearance of the device simpler and easier to clean and maintain. Moreover, the fixed platform 420 and the tilting table 430 are directly connected by the concealed hinge 450, which reduces the movement offset caused by assembly errors of multiple parts, making the rotation center of the tilting table 430 more stable and allowing for precise control of the tilting angle.

[0044] In other alternative embodiments, the tilting table 430 can also be rotatably connected to the base 410 via a rotating connector, which can be a hinge, etc.

[0045] In optional implementations of this application, such as Figure 9 and Figure 14 As shown, a limiting block 460 is also provided on the first side of the fixed platform 420, and the limiting block 460 protrudes from the first side of the fixed platform 420. When the flip platform 430 rotates away from the fixed platform 420 to the support position, the first side of the flip platform 430 abuts against the limiting block 460. When the flip platform 430 is in the support position, the limiting block 460 limits the flip platform 430, ensuring that the bearing surface 436 and the support surface 423 can be located on the same horizontal plane, avoiding damage caused by the end of the busbar 200 or battery string 100 being suspended.

[0046] Optionally, a third mounting groove is provided on the first side of the fixed platform 420. The limiting block 460 is installed in the third mounting groove by screws or welding, which can firmly fix the limiting block 460 to the first side of the fixed platform 420, improve the stability of the limiting block 460, and ensure the limiting effect of the limiting block 460.

[0047] In optional implementations of this application, such as Figures 4 to 14 As shown, the tilting table 430 includes a table body 432 and a sliding plate 433. The table body 432 is rotatably mounted on the first side of the fixed table 420. Specifically, the table body 432 has a second mounting groove 431, and the end of the concealed hinge 450 facing away from the fixed table 420 is fixedly mounted in the second mounting groove 431. The sliding plate 433 is slidably disposed on the table body 432 along a first direction, and the sliding plate 433 has a bearing surface 436.

[0048] When the flipping table 430 is in the supported position, the busbar 200 can be pressed against the bearing surface 436 by external force. Then, the sliding plate 433 is slid synchronously along the first direction, and the busbar 200 pressed against the sliding plate 433 also moves along the first direction, ultimately causing the busbar 200 to be misaligned relative to the end of the battery string 100 in the first direction. Since the busbar 200 is misaligned relative to the end of the battery string 100 in the first direction before the flipping table 430 flips the busbar 200, the extended welding strip 301 where the busbar 200 is located and the welding strip 300 on the upper surface of the end battery cell 101 are also misaligned accordingly. The resulting effect is that when the flipping table 430 flips the busbar 200 to the upper side of the battery string 100, the long solder strip 301 will not be stacked on the solder strip 300 on the upper surface of the end battery cell 101, thereby preventing short circuit when the battery string 100 is powered on, and also avoiding excessive stress at the solder strip 300 stack during subsequent lamination of the battery string 100, which could cause damage to the battery cell.

[0049] Pressing the busbar 200 onto the bearing surface 436 can be done manually or automatically. When pressing the busbar 200 automatically, the busbar folding device 400 also needs to be equipped with a pressing plate and a second driving member. When the flipping table 430 is in the supported position, the second driving member is configured to drive the pressing member to move in a direction close to or away from the bearing surface 436, so that the busbar 200 is pressed between the pressing member and the bearing surface 436. Furthermore, the busbar folding device 400 can also be equipped with a third driving member, so that the pressing member and the sliding plate drive the busbar 200 to slide in a first direction, so that the pressed busbar 200 is misaligned relative to the end of the battery string 100 in the first direction. The second and third driving members can be set separately or integrated together; optionally, the second and third driving members can be cylinders, electric cylinders, etc.

[0050] Optional, such as Figure 13 and Figure 14 As shown, a plurality of sliders 434 are spaced apart on the platform 432 along a first direction. A sliding plate 433 is provided with a slide rail 435 that matches the sliders 434 and extends along the first direction. The sliding plate 433 is slidably mounted on the platform 432 through the slide rail 435 and the sliders 434. The sliders 434 can be mounted on the second side of the platform 432. When the tilting platform 430 is in the support position, the first side of the platform 432 faces the fixed platform 420, and the second side of the platform 432 is positioned opposite to the first side.

[0051] In optional implementations of this application, such as Figure 12 and Figure 13As shown, the sliding plate 433 also has a first side adjacent to the bearing surface 436, that is, the sliding plate 433 has an L-shaped structure; a heating element 490 extending in a first direction is provided on the first side of the sliding plate 433.

[0052] During the production of photovoltaic modules, there are two scenarios: one where an insulating film has been applied to the busbar 200, and another where no insulating film has been applied to the busbar 200 beforehand. In the case where an insulating film has been applied to the busbar 200, when the busbar 200 at the end of the cell string 100 is flipped to the upper side of the cell string 100, it will not directly contact the cell string 100. If no insulating film is applied to the busbar 200 beforehand, the busbar 200 at the end of the battery string 100 will directly contact the battery string 100 after it is flipped to the upper side of the battery string 100, which will affect the stability of the circuit. Therefore, if no insulating film is applied to the busbar 200 beforehand, an insulating film needs to be applied to the busbar 200 before it is flipped. The busbar flipping device 400 in this application is equipped with a heating element 490, which can heat the busbar 200 and connect the busbar 200 with the insulating film. Compared with directly heating the insulating film, this can avoid the problem of damaging the insulating film due to overheating.

[0053] Furthermore, since the bearing surface 436 needs to press down on the busbar 200 after the flipping table 430 flips, if the heating element 490 is set on the bearing surface 436, it is easily damaged by pressure, and there is also a risk of damaging the busbar 200. Therefore, in this application, the heating element 490 is set on the first side of the sliding plate 433 instead of on the bearing surface 436; moreover, setting the heating element 490 on the first side of the sliding plate 433 can also make the overall structure of the device more compact.

[0054] Optionally, the heating element 490 can be a heating channel, an electric heating tube, or a ceramic heating plate; in this application, the heating element 490 adopts a ceramic heating plate, and multiple ceramic heating plates can be provided. The ceramic heating plates extend along the first direction, and each ceramic heating plate is installed at intervals along the first direction on the first side of the sliding plate 433.

[0055] In optional implementations of this application, such as Figure 8 , Figure 10 , Figure 12 and Figure 13 As shown, a receiving cavity 411 is formed between the base 410, the fixed platform 420, and the flipping platform 430. The driving member 441 is fixedly disposed in the receiving cavity 411. A gear seat is disposed in the receiving cavity 411. The first gear 442 is rotatably disposed on the gear seat in the receiving cavity 411. The second gear 443 is a sector gear. The second gear 443 is located in the receiving cavity 411 and is rotatably disposed on the first side of the fixed platform 420.

[0056] The accommodating cavity 411 formed between the base 410, the fixed platform 420, and the tilting platform 430 serves as a closed or semi-closed space, centrally housing the drive component 441, the first gear 442, and the second gear 443. This avoids space waste caused by scattered components, resulting in a more compact and highly integrated space. Simultaneously, the accommodating cavity 411 isolates the drive component 441, the first gear 442, and the second gear 443 from the external environment, effectively preventing external impurities from damaging the components, providing strong protection, and effectively extending the service life of the components. Furthermore, the second gear 443 adopts a sector gear, which on the one hand better adapts to the tilting action requirements of the tilting platform 430, and on the other hand reduces space occupation, improving the compactness of the mechanism.

[0057] Optionally, the base 410 includes a base plate and side plates located around the base plate and extending upward; the two side plates of the base 410 along the first direction have notches, and when the tilting table 430 is in the supported position, the tilting table 430 is located in the notches; the side plate near the tilting table 430 is L-shaped to close the notch portion, and at the same time, an opening is provided on the side plate near the tilting table 430, through which the connecting rod 444 and the second gear 443 can pass.

[0058] In optional implementations of this application, such as Figure 9 and Figure 11 As shown, a groove 422 is provided on the first side of the fixed platform 420. A second connecting shaft 446 is mounted in the groove 422. A through hole is provided on the second gear 443 away from its meshing teeth. The second connecting shaft 446 is mounted in the groove 422 through the through hole of the second gear 443. The groove 422 can form a wrapping support for the second connecting shaft 446, which can limit the radial displacement of the second connecting shaft 446 and provide stronger constraint. Moreover, mounting the first connecting shaft 445 in the groove 422 can reduce the height of the fixed platform 420 and reduce the size of the second gear 443, thereby optimizing the spatial layout and making the device structure more compact.

[0059] In optional implementations of this application, such as Figure 6 , Figure 8 , Figure 10 , Figure 12 and Figure 13 As shown, the busbar folding device 400 also includes an adsorption component 480 and a vacuum generating mechanism 470; the adsorption component 480 is disposed on the support surface 423 of the fixed platform 420, and the vacuum generating mechanism 470 is connected to the adsorption component 480. The vacuum generating mechanism 470 can make the adsorption component 480 form a negative pressure, thereby adsorbing the battery string 100 located on the support surface 423.

[0060] The adsorption component 480 cooperates with the vacuum generating mechanism 470 to adsorb the battery string 100 onto the support surface 423 through vacuum negative pressure, preventing displacement or shaking of the battery string 100 when the busbar 200 is flipped, thus ensuring the positioning accuracy of the flipping process. The vacuum generating mechanism 470 is placed within the accommodating cavity 411, protecting it. Furthermore, the vacuum generating mechanism 470 and the driving component 441 are located on opposite sides of the second gear 443, fully utilizing the space within the accommodating cavity 411 and avoiding space waste caused by structural stacking, resulting in a more compact device structure.

[0061] In an optional embodiment of this application, a buffer layer of flexible material is also provided on the support surface 423. The buffer layer can be made of rubber pads or foamed silicone. The buffer layer can fill the gap between the battery string 100 and the support surface 423 to ensure the sealing of vacuum adsorption and enhance the fixing effect. At the same time, it can also play a certain buffering role to prevent damage to the battery string 100 when the busbar 200 is folded.

[0062] In an optional embodiment of this application, the busbar folding device 400 further includes a first driving member. A base 410 is fixedly mounted on the driving end of the first driving member. The first driving member is configured to drive the base 410 to rotate in a horizontal plane, so that the flipping platform 430 and the fixing platform 420 can be parallel to the end edge of the battery string 100. The fact that both the flipping platform 430 and the fixing platform 420 are adjusted to be parallel to the end edge of the battery string 100 prevents the flipping platform 430 from colliding with the end battery cell 101 during the flipping process, thus preventing microcracks or breakage of the battery cell.

[0063] Optionally, a connecting flange is provided below the base 410, and the base 410 can be installed on the drive end of the first driving component through the connecting flange. The first driving component can be an electric motor, hydraulic motor, etc.

[0064] The busbar folding device 400 provided in this embodiment of the application, when in use: First, the drive unit 441 rotates the tilting table 430 to the support position through the first gear 442, the second gear 443 and the connecting rod 444, so that the bearing surface 436 of the tilting table 430 and the support surface 423 of the fixed table 420 are on the same horizontal plane.

[0065] Subsequently, the battery string 100 is moved so that the end of the battery string 100 is supported on the support surface 423 of the fixed platform 420, and the busbar 200 at the end of the battery string 100 is supported on the bearing surface 436 of the flipping platform 430.

[0066] Next, the drive unit 441 drives the flipping table 430 to rotate toward the fixed table 420 to the flipping position via the first gear 442, the second gear 443 and the connecting rod 444. In this process, the flipping table 430 rotates 180°, so that the busbar 200 can be flipped to the upper side of the battery string 100.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A busbar folding device, wherein the busbar folding device is used to flip the busbar welded to the end of the battery string upwards to the upper side of the battery string, characterized in that, The busbar folding device includes: a base, a fixed platform, a flipping platform, a driving component, a first gear, a second gear, and a connecting rod; The fixed platform is disposed on the base and extends along a first direction; the tilting platform is located on a first side of the fixed platform and extends along the first direction; the driving member is connected to the first gear, and the second gear meshes with the first gear; one end of the connecting rod is eccentrically and rotatably mounted on the second gear, and the other end of the connecting rod is rotatably mounted on the tilting platform; the driving member drives the first gear to rotate, thereby driving the second gear and the connecting rod to move, so that the tilting platform can rotate relative to the fixed platform; When the flipping platform rotates away from the fixed platform to the support position, the bearing surface of the flipping platform and the support surface of the fixed platform are on the same horizontal plane. The support surface of the fixed platform is used to support the end of the battery string, and the bearing surface of the flipping platform is used to support the busbar. When the flipping platform rotates toward the fixed platform to the flipping position, the bearing surface of the flipping platform is above the support surface of the fixed platform, and the busbar is flipped to the upper side of the battery string.

2. The busbar folding device according to claim 1, characterized in that, A first connecting shaft is fixedly provided at the end of the second gear near its meshing teeth. The first connecting shaft passes through the second gear and its two ends protrude from the two end faces of the second gear, respectively. Two connecting rods are configured, and the ends of the two connecting rods away from the tilting table are rotatably mounted on the two ends of the first connecting shaft, respectively.

3. The busbar folding device according to claim 1, characterized in that, The busbar folding device also includes several hidden hinges; The first side of the fixed platform is provided with a plurality of first mounting slots spaced apart along the first direction, and the flipping platform is provided with a plurality of second mounting slots spaced apart along the first direction. The hidden hinge, the first mounting slot and the second mounting slot are provided in a one-to-one correspondence. One end of the hidden hinge is fixedly installed in the corresponding first mounting slot and the other end is fixedly installed in the corresponding second mounting slot.

4. The busbar folding device according to claim 1, characterized in that, The first side of the fixed platform is also provided with a limiting block, which protrudes from the first side of the fixed platform. When the tilting platform rotates away from the fixed platform to the support position, the first side of the tilting platform abuts against the limiting block, so that the bearing surface and the support surface can be located on the same horizontal plane.

5. The busbar folding device according to claim 1, characterized in that, The flipping table includes a table body and a sliding plate; the table body is rotatably mounted on the first side of the fixed table, and the sliding plate is slidably disposed on the table body along the first direction, and the sliding plate has the bearing surface.

6. The busbar folding device according to claim 5, characterized in that, The sliding plate also has a first side surface adjacent to the bearing surface, and a heating element extending along the first direction is disposed on the first side surface of the sliding plate.

7. The busbar folding device according to any one of claims 1 to 6, characterized in that, The base, the fixed platform, and the flipping platform together form an accommodating cavity; The driving component is fixedly disposed within the accommodating cavity, the first gear is rotatably disposed within the accommodating cavity, and the second gear is a sector gear, which is located within the accommodating cavity and rotatably disposed on the first side of the fixed platform.

8. The busbar folding device according to claim 7, characterized in that, The first side of the fixed platform has a groove, and a second connecting shaft is mounted in the groove. The second gear has a through hole at a position away from its meshing teeth, and the second connecting shaft is mounted in the groove through the through hole of the second gear.

9. The busbar folding device according to claim 7, characterized in that, The busbar folding device further includes an adsorption component and a vacuum generating mechanism. The adsorption component is provided on the fixed platform. The adsorption component is a suction cup or an adsorption hole. The vacuum generating mechanism is connected to the adsorption component and is located in the accommodating cavity. The vacuum generating mechanism is located on the first side of the second gear, and the driving component is located on the second side of the second gear. The first side and the second side of the second gear are arranged opposite to each other. The fixed platform adsorbs the battery string on the support surface through the adsorption component. And / or, a buffer layer of flexible material is provided on the support surface.

10. The busbar folding device according to claim 1, characterized in that, The busbar folding device further includes a rotary drive, and the base is fixedly mounted on the drive end of the rotary drive. The rotary drive is configured to drive the base to rotate in a horizontal plane so that the flipping platform and the fixed platform can be parallel to the end edge of the battery string.

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