Bus bar feeding device and stitch welding machine

Abstract

The utility model relates to a bus bar feeding device and a stitch welding machine. The bus bar feeding device comprises a winding mechanism and a base. The winding mechanism is used for winding bus bars; a stop structure is arranged on the side, facing the winding mechanism, of the base and used for making contact with and stopping the winding mechanism. When the winding mechanism shakes during rotating feeding, the stop structure can apply counter-acting force to the winding mechanism, a supporting point is added beside the unstable winding mechanism to reduce shaking of the winding mechanism, the stop structure enables the winding mechanism to have more stable constraint in the rotating process, and then the influence on the welding yield of the bus bar due to overall shaking of a roll material is reduced. When feeding is stopped, the stop structure can provide resistance for the winding mechanism to overcome inertia and slow down to stop continuous rotation of the winding mechanism, so that bending of the bus bar due to inertia can be reduced, the bus bar is in a normal linear state and can be normally welded, and material waste caused by the fact that the bent section of the bus bar cannot be welded is reduced.

Description

Technical Field

[0001] This application relates to the field of photovoltaic equipment, and in particular to a busbar feeding device and a stacking welding machine. Background Technology

[0002] During the manufacturing process of photovoltaic modules, a lap welding process is required to weld busbars. During the feeding of the busbar roll, rotation can cause the entire roll to wobble, affecting the welding yield. When feeding stops, due to inertia, the entire roll of busbars continues to rotate, easily causing the busbars to bend. The bent sections of the busbar are difficult to weld properly, resulting in material waste. Utility Model Content

[0003] Therefore, it is necessary to provide a busbar feeding device and a stacking welding machine to address the problem that busbar rolls are prone to shaking during the feeding process and that the busbars will continue to rotate due to inertia when they need to be stopped.

[0004] In a first aspect, a busbar feeding device includes:

[0005] A winding mechanism for winding a busbar; and

[0006] A base is provided with a stop structure on the side of the base facing the winding mechanism, the stop structure being used to contact and stop the winding mechanism.

[0007] In one embodiment, the winding mechanism includes a shaft and a disc, the disc being disposed on one side of the shaft along its own axis, the shaft being used to wind the busbar, and the stop structure being used to contact and stop the disc and / or the shaft.

[0008] In one embodiment, the stop structure is an anti-slip groove, the base is provided with the anti-slip groove through a first direction, the first direction intersects the axial direction of the shaft, the shaft is located outside the anti-slip groove, and the anti-slip groove is used to accommodate at least part of the edge of the disc.

[0009] In one embodiment, the disc body includes two disc bodies, which are respectively disposed at both ends of the shaft body along its own axis. The anti-slip grooves include a plurality of grooves spaced apart along the axial direction of the winding mechanism. The edges of the two disc bodies are respectively located within the anti-slip grooves, and the shaft body is located outside all the anti-slip grooves.

[0010] In one embodiment, the anti-slip groove has a dimension of 11mm to 13mm along the axial direction of the shaft, and the disc has a dimension of 9mm to 11mm along the axial direction of the shaft.

[0011] In one embodiment, the surface of the base includes an arc surface that protrudes toward the disk body and is located at the bottom of the disk body, and the anti-slip groove is recessed in the arc surface.

[0012] In one embodiment, the base includes a base body and a roller, the roller being disposed on the base body and located at the bottom of the disc body, the roller having the arc surface, and the roller being provided with the anti-slip groove.

[0013] In one embodiment, the rollers include two rollers spaced apart along the first direction, both rollers being located at the bottom of the disc body and respectively disposed on both sides of the disc body along the first direction.

[0014] In one embodiment, the busbar feeding device further includes a stop wedge for stopping the roller.

[0015] In a second aspect, there is a stacking welding machine, the stacking welding machine comprising a busbar feeding device as described in the first aspect.

[0016] The aforementioned busbar feeding device has a stop structure on its base. When the coil is rotating during feeding, the stop structure limits the winding mechanism, restricting excessive swaying and making its movement more stable. This reduces the impact of overall coil swaying on the busbar welding yield. When feeding stops, the winding mechanism continues to rotate due to inertia. The stop structure contacts and applies resistance to the winding mechanism, causing it to overcome inertia and stop rotating. This prevents the busbar from bending due to inertia, ensuring it remains in a normal state and can be welded normally, reducing material waste caused by the inability to weld bent sections of the busbar. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the disclosed drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a busbar feeding device provided in an embodiment of this application.

[0019] Figure 2 This is a schematic diagram of the base structure in an embodiment of this application.

[0020] Explanation of reference numerals in the attached drawings: 100, busbar feeding device; 1, winding mechanism; 11, shaft; 12, disc; 2, base; 21, stop structure; 22, anti-slip groove; 23, seat; 24, roller; 3, stop wedge. Detailed Implementation

[0021] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0022] In the manufacturing process of photovoltaic modules, lap welding is required to connect busbars to the solder strips on the surface of the solar cells, forming a current path that allows the current generated by the solar cells to be smoothly transmitted to the external circuit through the busbars. During the lap welding process, busbar rolls are typically loaded, and the rolls are rotated to release the busbars. However, uneven mass distribution of the busbars after winding can cause the center of gravity to be off-axis during rotation, resulting in roll wobbling. Furthermore, inconsistent winding tightness can lead to uneven stress distribution within the roll, also causing wobbling during rotation and affecting the welding yield. In addition, when the lap welding process stops, the roll tends to continue rotating due to inertia, releasing a section of busbar. Since welding has stopped, this section cannot be welded onto the solar cell and remains bent, making it difficult to weld properly and resulting in material waste.

[0023] Regarding the above issues, firstly, please refer to [the relevant information]. Figure 1This application provides a busbar feeding device 100. The busbar feeding device 100 includes a winding mechanism 1 and a base 2. The winding mechanism 1 is used to wind a busbar (not shown in the figure); the base 2 has a stop structure 21 on the side facing the winding mechanism 1, which is used to contact and stop the winding mechanism 1. When the winding mechanism 1 rotates to feed the busbar, the stop structure 21 on the base 2 contacts the winding mechanism 1. When the material roll shows a tendency to sway, the stop structure 21 can apply a reaction force to the winding mechanism 1, limiting its movement and providing an additional support point. This adds a support point next to the unstable winding mechanism 1 to reduce its swaying. The stop structure 21 provides a more stable constraint to the winding mechanism 1 during rotation. The contact between the two increases the stability of the busbar feeding device 100, thereby reducing swaying and further reducing the impact of overall material roll swaying on the busbar welding yield. When feeding stops, the winding mechanism 1 will continue to rotate due to inertia, and the stop structure 21 can contact the winding mechanism 1. The stop structure 21 can provide resistance to the winding mechanism 1 to overcome inertia and stop the winding mechanism 1 from rotating. This can reduce the bending of the busbar due to inertia, keep the busbar in a normal straight state, and can be welded normally, reducing material waste caused by the inability to weld the bent section of the busbar.

[0024] The axial direction in this embodiment is as follows: Figure 1 and Figure 2 The BB direction is shown below, with the first direction being as follows: Figure 1 and Figure 2 The AA direction is shown.

[0025] The embodiments of this application do not limit the specific structure of the winding mechanism 1. In some embodiments, the winding mechanism 1 includes a spool, the busbar is wound on the spool, and the stop structure 21 is used to contact the spool. In other embodiments, the winding mechanism 1 includes a reel, the busbar is wound on the reel, and the stop structure 21 is used to contact the reel.

[0026] This application uses a reel as an example to illustrate the specific structure of the winding mechanism 1: For some embodiments, please refer to... Figure 1 The winding mechanism 1 (reel) includes a shaft 11 and a disc 12. The disc 12 is located on one side of the shaft 11 along its own axis. The shaft 11 is used to wind the busbar. The stop structure 21 is used to contact and stop the disc 12 and / or the shaft 11. The shaft 11, as the main part for winding the busbar, provides stable winding support for the busbar. During the winding process, the busbar can be tightly wound on the shaft 11, avoiding loosening, displacement, or other unstable situations. The disc 12 can restrict the movement of the busbar on the shaft 11 along its own axis, preventing the busbar from slipping off or shifting from the shaft 11, thereby improving the stability and neatness of the busbar winding.

[0027] In an optional embodiment, the winding mechanism 1 may have a disc 12 disposed at one end of the shaft 11 along its own axis, or, please refer to Figure 1 Two discs 12 are respectively provided at opposite ends of the shaft 11 along its own axis. The two discs 12 can form a double-sided restriction on the winding of the busbar, so that the busbar is effectively constrained on both sides in the axial direction and can be better maintained in the winding position on the shaft 11.

[0028] The embodiments of this application do not limit the winding state of the busbar. In an optional embodiment, the busbar may be wound on a portion of the shaft 11, and the busbar does not contact the side of the disk 12 facing the shaft 11. In other optional embodiments, the busbar is wound on the entire shaft 11, and the busbar contacts the side of the disk 12 facing the shaft 11.

[0029] This application does not limit the object that the stop structure 21 can stop. In optional embodiments, the stop structure 21 can contact and stop the shaft 11 of the winding mechanism 1. For example, when the busbar is wound on part of the shaft 11, and another part of the shaft 11 is exposed, the stop structure 21 is used to contact and stop the exposed part of the shaft 11. In other embodiments, the stop structure 21 can contact and stop the disc 12 of the winding mechanism 1. For example, when the busbar is wound on all of the shaft 11, the stop structure 21 is used to contact and stop the disc 12.

[0030] It is understandable that the sum of the radial dimension of the shaft 11 and the winding thickness of the busbar is less than or equal to the radial dimension of the disc 12. This prevents the busbar from overflowing from the edge of the disc 12, which would cause winding disorder. If the busbar exceeds the radial dimension range of the disc 12, it will interfere with the normal operation of the stop mechanism and hinder the contact between the stop structure 21 and the disc 12.

[0031] In optional embodiments, the stop structure 21 may be an anti-slip protrusion or an anti-slip groove 22, etc. When the stop structure 21 is an anti-slip protrusion, the anti-slip protrusion can contact the shaft 11 or the disc 12 and stop it. This application embodiment uses an anti-slip groove 22 as the stop structure 21 for specific description: Please refer to... Figure 1 and Figure 2 In some embodiments, the stop structure 21 is an anti-slip groove 22, and the base 2 is along the first direction (e.g., Figure 1 and Figure 2 The first direction (as shown in AA direction) is provided with an anti-slip groove 22, and the first direction is the same as the axis direction of the shaft 11 and / or the disc 12 (e.g., Figure 1 and Figure 2The shaft 11 is located outside the anti-slip groove 22, which is used to accommodate at least part of the edge of the disc 12. The anti-slip groove 22 can better restrict the movement of the disc 12 on the axis, thereby reducing the wobbling of the winding mechanism 1. With anti-slip protrusions, the disc 12 may accidentally slip off the anti-slip protrusions when subjected to external impact or vibration, resulting in stop failure. The shape of the anti-slip groove 22 can constrain the edge of the disc 12 from multiple directions, making it less likely for the disc 12 to detach from the stop structure 21 when subjected to unexpected external forces, thus providing a more stable stop effect. In addition, it is easier to place the edge of the disc 12 into the anti-slip groove 22 than to align the anti-slip protrusions with the corresponding positions on the disc 12 or shaft 11. The anti-slip groove 22 has a certain guiding and positioning function for the disc 12, reducing the alignment difficulty during installation and improving assembly efficiency and accuracy. Furthermore, the anti-slip groove 22 accommodates the edge of the disc 12, increasing the contact area between them and facilitating the generation of friction. When the disc 12 tends to rotate due to inertia, this friction effectively hinders its continued rotation. In addition, the anti-slip groove 22 provides a relatively fixed space for the edge of the disc 12. The disc 12 is constrained within this space, greatly reducing its sway and thus improving the stability of the winding mechanism 1.

[0032] This application embodiment does not limit the number of anti-slip grooves 22 provided; one, two, three, four, or other numbers of anti-slip grooves 22 may be provided. The edge of one disc 12 of the winding mechanism 1 may be contacted and stopped by one, two, or three anti-slip grooves 22.

[0033] Please see Figure 1 In some embodiments, the disc body 12 includes two disc bodies 12, which are respectively disposed at both ends of the shaft body 11 along its own axis. The anti-slip grooves 22 include a plurality of grooves spaced apart along the axial direction of the winding mechanism 1. The edges of the two disc bodies 12 are respectively located within the anti-slip grooves 22, and the shaft body 11 is located outside all the anti-slip grooves 22. It can be understood that providing multiple anti-slip grooves 22 can increase the contact area between the anti-slip grooves 22 and the winding mechanism 1, thereby improving the stopping effect. The multiple anti-slip grooves 22 can work together to reduce the shaking of the disc body 12 and further reduce the continuous rotation of the disc body 12 due to inertia.

[0034] In some embodiments, the anti-slip groove 22 has a dimension of 11mm to 13mm along the axial direction of the shaft 11, and the disc 12 has a dimension of 9mm to 11mm along the axial direction of the shaft 11. The size of the anti-slip groove 22 is such that it can just fit against the edge of the disc 12 to contact and limit the disc 12.

[0035] For example, the size of the anti-slip groove 22 can be any value within the above range, such as 11mm, 11.5mm, 12mm, 12.5mm, 13mm, etc. The size of the disc body 12 can be any value within the above range, such as 9mm, 9.5mm, 10mm, 10.5mm, 11mm, etc.

[0036] It should be noted that when the winding mechanism 1 is feeding material, the force driving the shaft 11 of the winding mechanism 1 to rotate is greater than the frictional force exerted by the anti-slip groove 22 on the disc 12 to release the busbar. In other words, the presence of the anti-slip groove 22 does not affect the normal feeding process of the winding mechanism 1. When the winding mechanism 1 stops feeding material, the frictional force exerted by the anti-slip groove 22 on the disc 12 can cause the disc 12 to overcome its own inertia and stop quickly, thus stopping it in time and preventing the disc 12 from continuing to rotate. Since the anti-slip groove 22 has a certain depth, it can accommodate the edge of the disc 12 and limit the disc 12 along the axial direction of the shaft 11, thereby reducing the shaking of the disc 12.

[0037] The structure of the base 2 will be described in detail below: The embodiments of this application do not limit the location of the base 2. In some optional embodiments, the base 2 can be located at the bottom of the winding mechanism 1, or the base 2 can be located on the side of the winding mechanism 1. For example, when the stop structure 21 is an anti-slip groove 22, the base 2 is located at the bottom of the winding mechanism 1. When the stop structure 21 is an anti-slip protrusion, the base 2 can be located on the side of the winding mechanism 1, and the anti-slip protrusion can contact the winding mechanism 1 from the side and stop it.

[0038] Please see Figure 2 In some embodiments, the surface of the base 2 includes an arc surface that protrudes towards the disc 12 and is located at the bottom of the disc 12, with the anti-slip groove 22 recessed in the arc surface. Compared to a flat surface, the arc surface increases the contact area between the anti-slip groove 22 and the disc 12 radially when in contact with the disc 12, thereby facilitating the generation of friction between the anti-slip groove 22 and the disc 12 and making the stop more reliable. When the disc 12 tends to rotate or wobble, the larger contact area can more effectively disperse the force, reducing the rotation and wobble of the disc 12.

[0039] In an optional embodiment, the base 2 may be an arc-shaped protrusion located at the bottom of the disk body 12. See also... Figure 2 In some other embodiments, the base 2 includes a seat 23 and a roller 24. The roller 24 is disposed on the seat 23 and located at the bottom of the disc 12. The roller 24 has an arc surface and is provided with anti-slip grooves 22. The roller 24 is located at the bottom of the disc 12 and can support the disc 12.

[0040] Please see Figure 2In some embodiments, roller 24 includes rollers along a first direction (e.g., Figure 2 Two rollers 24 are arranged at intervals (as shown in direction AA). Both rollers 24 are located at the bottom of the disc body 12 and are respectively located on both sides of the disc body 12 along the first direction. Both rollers 24 can support the disc body 12, making the disc body 12 more stable when rotating.

[0041] Please see Figure 2 In an optional embodiment, each roller 24 is provided with two anti-slip grooves 22 at the bottom of the two discs 12 of the winding mechanism 1, that is, the two rollers 24 stop the discs 12 on both sides of the winding mechanism 1 through the four anti-slip grooves 22.

[0042] Please see Figure 2 In an optional embodiment, the roller 24 is rotatably connected to the base 2. Alternatively, the roller 24 may be fixedly connected to the base 2. When the roller 24 is rotatably connected to the base 2, in some embodiments, the busbar feeding device 100 further includes a stop wedge 3, which is used to stop the roller 24 and prevent the roller 24 from rotating.

[0043] Secondly, embodiments of this application also provide a stacking welding machine, which includes a busbar feeding device 100 as described in the first aspect. The stacking welding machine is capable of welding busbars fed from the busbar feeding device 100 onto the welding strips of the battery cells.

[0044] In summary, the busbar feeding device 100 provided in this application embodiment, by providing a stop structure 21, can constrain and limit the winding mechanism 1 when the busbar feeding device 100 feeds and releases the busbar, preventing the winding mechanism 1 from shaking during rotation, thereby improving the welding yield of the busbar. Furthermore, by providing the stop structure 21, frictional force can be applied to the winding mechanism 1 when the stacking welding machine stops working, thereby reducing the continuous rotation of the winding mechanism 1 due to inertia, allowing the winding mechanism 1 to stop releasing the busbar in time, avoiding busbar bending, and saving material.

[0045] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0046] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0047] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0048] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0049] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0050] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A busbar feeding device (100), characterized in that, The utility model relates to a busbar feeding device (100) and a busbar welding machine. The busbar feeding device (100) comprises a winding mechanism (1) and a base (2). The winding mechanism (1) is used for winding the busbar. The base (2) is provided with a stop structure (21) on the side facing the winding mechanism (1), which is used for contacting and stopping the winding mechanism (1).

2. The busbar feeding device (100) according to claim 1, characterized in that The stop structure (21) is an anti-skid groove (22), and the base (2) is provided with the anti-skid groove (22) along a first direction intersecting the axis direction of the shaft body (11).

3. The busbar feeding device (100) according to claim 2, characterized in that The anti-skid groove (22) is used for accommodating the edge of at least part of the disc body (12).

4. The busbar feeding device (100) according to claim 3, characterized in that The disc body (12) comprises two disc bodies (12) arranged at the two ends of the shaft body (11) along its own axis.

5. The busbar feeding device (100) according to claim 3, characterized in that The anti-skid groove (22) comprises a plurality of anti-skid grooves (22) arranged along the axis direction of the winding mechanism (1) at intervals.

6. The busbar feeding device (100) according to claim 3, characterized in that The size of the anti-skid groove (22) along the axis direction of the shaft body (11) is 11mm-13mm, and the size of the disc body (12) along the axis direction of the shaft body (11) is 9mm-11mm.

7. The busbar feeding device (100) according to claim 6, characterized in that The surface of the base (2) comprises a curved surface protruding towards the disc body (12) and located at the bottom of the disc body (12).

8. The busbar feeding device (100) according to claim 7, characterized in that The base (2) comprises a seat body (23) and a roller (24) arranged on the seat body (23).

9. The busbar feeding device (100) according to claim 7, characterized in that The roller (24) is located at the bottom of the disc body (12) and has the curved surface.

10. A butt welder characterized by The roller (24) comprises two rollers (24) arranged along the first direction at intervals. The two rollers (24) are located at the bottom of the disc body (12) and arranged on the two sides of the disc body (12) along the first direction. The busbar feeding device (100) further comprises a stop wedge (3) used for stopping the roller (24). The busbar welding machine comprises the busbar feeding device (100) according to any one of claims 1-9.

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