Bus bar transfer mechanism and welding device

Abstract

The utility model relates to the field of stitch welding machines, in particular to a bus bar transferring mechanism and a welding device.According to the transferring mechanism, a support is connected between two racks, the support can be slidably connected to the racks with the extending direction of the racks as the first direction, and a first mounting base is slidably connected to the support with the extending direction of the support as the second direction; compared with a traditional transmission structure of a single rack or a track, the transfer mechanism can be compatible with the transfer work of the bus bar with the larger length, and the stability is higher. The plurality of controllable suction heads are arranged on the second mounting base in the second direction and face the third direction, the third driving device directly drives the second mounting base to vertically move so as to suck or release the bus bar, and in the bus bar sucking or releasing process, the bracket and the first mounting base do not need to be moved, so that the overall stability of the mechanism is ensured, and the production efficiency is improved. And the transfer precision and the welding quality of the bus bar are improved.

Description

Technical Field

[0001] This application relates to the field of stacking welding machines, and specifically to a busbar transfer mechanism and welding device. Background Technology

[0002] A shingled solar panel welding machine is a key piece of equipment in photovoltaic module manufacturing, used to weld solar cells and busbars together. Solar cells are typically made of silicon and have fine grid lines and main grid lines on their surface to collect current. The solar cell is the basic unit of a solar cell, while the busbar is responsible for collecting and conducting current, aggregating the current from multiple solar cells. Therefore, the quality of the welding directly affects the efficiency and reliability of the module.

[0003] During the manufacturing process of photovoltaic modules, after the busbars are cut or bent by the cutting mechanism of the shingling machine, they need to be transported from the processing position to the welding station to be welded to the solar cells. In the prior art, a suction cup is usually used to pick up the busbars, and the suction cup is installed in a transmission mechanism with multiple directions of movement. The movement of the transmission mechanism moves the busbars to above the welding station, and then the suction cup releases the busbars, placing them on the welding station.

[0004] However, since the stacking welding machine combines multiple processing links and multiple moving mechanisms, the equipment as a whole is inevitably affected by vibration. In addition, the traditional busbar handling mechanism is usually hoisted by a separate frame or slide rail, which is simple in structure. The vibration of the equipment can easily affect the docking of the suction cup and the busbar, which may cause the busbar to deviate and not be accurately positioned on the welding station, thus affecting the welding quality of the busbar.

[0005] Furthermore, during the busbar transport process, the suction cup moves up and down to pick up and release the busbar, with this up-and-down movement being the final action in transporting the busbar. In traditional busbar transport mechanisms, the horizontal moving module is mounted on the vertical moving module. This means that when the suction cup moves up and down in a traditional mechanism, it drives the horizontal moving module to move up and down as well. After the suction cup is precisely positioned, the up-and-down movement of other moving modules may cause the suction cup to wobble, which is detrimental to its stability and will also affect the busbar transfer accuracy and welding quality. Utility Model Content

[0006] To solve, or at least partially solve, the above-mentioned technical problems, this application provides a busbar transfer mechanism, comprising:

[0007] Two racks arranged in parallel;

[0008] A support extends from one frame to another and is slidably connected to the frame in the first direction of the extension direction of the frame. The support is connected to a first driving device for driving the support.

[0009] A first mounting base is slidably connected to the bracket with the extension direction of the bracket as the second direction, and is connected to a second driving device for driving the first mounting base.

[0010] The second mounting base is slidably connected to the first mounting base in a third direction and is connected to a third driving device for driving the second mounting base. The third direction is perpendicular to the first direction and the second direction, respectively.

[0011] At least one suction head assembly, the suction head assembly including a plurality of controllable suction heads arranged along the second direction on the second mounting base, the controllable suction heads facing the third direction, for sucking up or releasing the manifold.

[0012] Optionally, the second mounting base includes:

[0013] A connecting plate is slidably connected to the first mounting base, and the connecting plate is connected to the third driving device;

[0014] A mounting plate is detachably connected to the connecting plate. The mounting plate has multiple mounting holes. The controllable suction head is installed in the mounting holes and extends out of the surface of the mounting plate.

[0015] Optionally, the mounting plate is arranged parallel to the bracket, the mounting holes extend toward the extension direction of the mounting plate, and at least two controllable suction heads are provided in each mounting hole, and the position of the controllable suction heads in the mounting holes is adjustable.

[0016] Optionally, the mounting plate includes an elongated strip on which a set of suction head assemblies are disposed.

[0017] Optionally, the mounting plate includes two parallel elongated strips connected by ribs, and each elongated strip is provided with a set of suction head assemblies.

[0018] Optionally, the mounting plate is perpendicular to the connecting plate, and a support member is provided on one side of the connecting plate, the support member being connected to the rib plate.

[0019] Optionally, the support includes two parallel crossbeams arranged vertically, the two crossbeams are fixedly connected by ribs, and the two ends of the crossbeams are slidably connected to a first track arranged along the first direction on the frame by lifting components.

[0020] The first drive device is mounted on the frame and coupled to the hoisting component to drive the hoisting component to slide along the first track.

[0021] Optionally, each of the two crossbeams is provided with a second track arranged along the second direction, and the first mounting base is connected to the second track on the two crossbeams respectively;

[0022] The second drive device is mounted on the crossbeam and coupled to the first mounting base to drive the first mounting base to slide along the second track.

[0023] Optionally, the first mounting base is provided with two sets of third tracks arranged along the third direction, and the second mounting base is respectively connected to the two sets of third tracks;

[0024] The third driving device is mounted on the first mounting base and coupled to the second mounting base to drive the second mounting base to slide along the third track.

[0025] This application provides a welding apparatus, comprising:

[0026] The busbar transfer mechanism described above is used to transfer the busbar to the welding station to contact the welding strip of the battery cell;

[0027] A welding mechanism for welding the busbar to the welding strip.

[0028] The busbar transfer mechanism provided in this application connects a bracket between two frames. The bracket is slidably connected to the frame in the first direction of its extension. A first mounting base is slidably connected to the bracket in the second direction of its extension, and a second mounting base is slidably connected to the first mounting base in the third direction. This enables the controllable suction head to move in both the horizontal and vertical directions. Compared to traditional transmission structures with a single frame or track, this busbar transfer mechanism can accommodate the transfer of busbars of greater length and better adapt to equipment vibration, reducing the impact of vibration on the suction head and achieving higher stability. Multiple controllable suction heads are arranged along the second direction on the second mounting base, with the controllable suction heads facing the third direction. A third drive device directly drives the second mounting base to move vertically to pick up or release the busbar. During the picking up or releasing of the busbar, there is no need to move the bracket and the first mounting base, ensuring the overall stability of the mechanism, further reducing the impact of vibration on the suction cup, ensuring accurate positioning of the suction cup and busbar, and improving the transfer accuracy and welding quality of the busbar.

[0029] The welding apparatus provided in this application, having the busbar transfer mechanism described above, also possesses all the advantages described above. Attached Figure Description

[0030] To more clearly illustrate the embodiments of this application, the relevant drawings will be briefly described below. It is understood that the drawings described below are only for illustrating some embodiments of this application, and those skilled in the art can obtain many other technical features and connections not mentioned herein based on these drawings.

[0031] Figure 1 This is a schematic diagram of the busbar transfer mechanism in this application;

[0032] Figure 2 for Figure 1 Enlarged diagram of part A in the diagram;

[0033] Figure 3 This is a schematic diagram of one embodiment of a busbar transfer mechanism.

[0034] Explanation of reference numerals in the attached figures:

[0035] 10. Frame; 11. First guide rail; 12. Support rail;

[0036] 20. Support frame; 201. Crossbeam; 202. Rib column; 21. First lifting component; 22. Second lifting component; 23. Second guide rail;

[0037] 30. First mounting base; 31. Third guide rail;

[0038] 40. Second mounting base; 41. Connecting plate; 42. Mounting plate; 421. Mounting hole; 422. Rib plate; 43. Support member;

[0039] 50. Controllable suction head;

[0040] 60. Busbar;

[0041] 71. First drive unit; 72. Second drive unit; 73. Third drive unit. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0043] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model 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. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0045] The technical solutions in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0046] Example 1

[0047] like Figure 1 As shown, this embodiment provides a busbar transfer mechanism, which belongs to the processing equipment of battery cells. The busbar transfer mechanism is installed on welding devices such as stacking welding machines and is used to transport the busbar 60 from the processing station to the welding station to realize the welding of the battery cell strip and the busbar 60.

[0048] The busbar transfer mechanism of this embodiment includes two parallel frames 10. The two frames 10 can be set separately or can be a shared frame on the lap welding machine. The frames 10 are fixedly installed on the lap welding machine and are the supporting structure of the entire busbar transfer mechanism.

[0049] The busbar transfer mechanism also includes a bracket 20, which extends from one frame 10 to the other frame 10, with both ends of the bracket 20 slidably connected to the frame 10. In this embodiment, the extension direction of the frame 10 is taken as the first direction, and the bracket 20 can slide along the frame 10 in the first direction, thereby realizing the displacement adjustment of the bracket 20.

[0050] Specifically, such as Figure 1 and Figure 2As shown, two frames 10 are horizontally arranged, each with a horizontally arranged first guide rail 11 on its surface. The two ends of the bracket 20 are suspended on the first guide rail 11 by a lifting device. In the figure, the lifting device is the first lifting component 21, which is L-shaped and hangs above the frame 10. The first lifting component 21 cooperates with the first guide rail 11 and can slide along the first guide rail 11.

[0051] In one embodiment, the lifting component can also be a slider, with both ends of the bracket 20 connected to the first guide rails 11 of the two frames 10 via the slider.

[0052] like Figure 1 As shown, this embodiment includes a first driving device 71 for driving the support 20 to slide along the first guide rail 11. The first driving device 71 is installed at the end of each frame 10 and coupled to the first lifting member 21. The first driving device 71 can be a servo motor, which drives the first lifting member 21 to move through a lead screw installed inside the frame 10, thereby realizing the movement of the support 20 along a first direction. The first driving device 71, using a servo motor, has the characteristics of high precision and fast response. It is connected to the corresponding lifting member through a transmission mechanism (such as a ball screw or rack and pinion) to achieve precise position control.

[0053] In this embodiment, the bracket 20 is connected between two racks 10. The preferred connection method is that the bracket 20 is vertically connected between the two racks 10, which allows the bracket 20 to move vertically. Of course, the bracket 20 and the rack 10 can also be connected at other angles, and this is not a limitation.

[0054] like Figure 1 As shown, in this embodiment, a first mounting base 30 is mounted on the bracket 20. The first mounting base 30 is slidably connected to the bracket 20 with the extension direction of the bracket 20 as the second direction, and is connected to a second driving device 72 for driving the first mounting base 30.

[0055] Specifically, a second guide rail 23 is provided on the surface of the bracket 20. The second guide rail 23 extends in the same direction as the bracket 20. The first mounting seat 30 is mounted on the second guide rail 23. Under the push of the second drive device 72, the first mounting seat 30 can slide along the second guide rail 23 on the bracket 20.

[0056] In this embodiment, a mounting base is provided above the bracket 20, and the second driving device 72 is mounted on the mounting base above the bracket 20. The second guide rail 23 is provided on the side of the bracket 20, so the first mounting base 30 is also located on the side of the bracket 20. The first mounting base 30 has an extension block extending to the top of the bracket 20. The second driving device 72 is connected to the extension block and drives the first mounting base 30 to slide by pushing the extension block.

[0057] The second driving device 72 in this embodiment can be a servo motor or a cylinder. Its transmission principle can be the same as that of the first driving device 71 or different. Since the driving principle of the second driving device 72 is common knowledge in the field, it will not be described in detail in this embodiment.

[0058] In this embodiment, a plurality of first mounting seats 30 are provided on the bracket 20, and the plurality of first mounting seats 30 are arranged at intervals along the extension direction of the bracket 20.

[0059] Because the support 20 needs to bear certain loads, in one embodiment, the support 20 has a double-layer structure. For example... Figure 2 and Figure 3 As shown, the bracket 20 includes two parallel horizontal beams 201 arranged vertically, which are fixedly connected by ribs 202. Each of the two horizontal beams 201 is provided with a second guide rail 23. The first mounting base 30 is mounted on the two horizontal beams 201 via the two second guide rails 23 to improve stability.

[0060] The first lifting component 21 mentioned above connects the edges of the two crossbeams 201 and is lifted onto the frame 10.

[0061] Furthermore, such as Figure 1 As shown, each of the two frames 10 is provided with a support slide rail 12, which is parallel to the frame 10. A second lifting component 22 is also provided below the first lifting component 21. The second lifting component 22 is fixedly connected to the end of the first lifting component 21 or the lower crossbeam 201. The second lifting component 22 is suspended on the support slide rail 12 and can slide along the support slide rail 12.

[0062] In this embodiment, the function of the support slide rail 12 and the second lifting component 22 is the same as the cooperation principle of the frame 10 and the first lifting component 21, and their functions are also the same. Furthermore, the support slide rail 12 and the second lifting component 22 share the load of the frame 10, thereby improving the load-bearing capacity of the frame 10 and further improving the overall stability of the transfer mechanism, which is beneficial to resisting vibration.

[0063] like Figure 1 As shown, in this embodiment, a second mounting base 40 is mounted on the first mounting base 30, and a third driving device 73 for driving the second mounting base 40 is connected to the first mounting base 30 in a directional sliding manner.

[0064] Specifically, such as Figure 2 As shown, the first mounting base 30 is rectangular and has two vertically arranged third guide rails 31. The second mounting base 40 is mounted on the two third guide rails 31 and slides along the third guide rails 31 under the push of the third driving device 73.

[0065] In this embodiment, the extension direction of the third guide rail 31 is taken as the third direction. According to the description of the above embodiment, the first direction and the second direction can be taken as the X-axis and Y-axis directions on the horizontal plane, and the third direction is perpendicular to the first direction and the second direction, and can be taken as the Z-axis direction. Under the action of the first driving device 71, the second driving device 72 and the third driving device 73, the second mounting base 40 can realize free movement in the X-axis, Y-axis and Z-axis directions.

[0066] The third drive device 73 in this embodiment is the same as the second drive device 72, and can be a servo motor or a cylinder, which will not be described in detail here.

[0067] The second mounting base 40 is provided with at least one set of suction head assemblies. The suction head assembly includes a plurality of controllable suction heads 50 arranged along the second direction, with the controllable suction heads 50 facing the third direction. The arrangement of the plurality of controllable suction heads 50 corresponds to the manifold 60, and they can be moved above the manifold 60 for sucking up or releasing the manifold 60.

[0068] In this embodiment, the controllable suction head 50 is a suction cup device. Each controllable suction head 50 is connected to an air passage and contains a solenoid valve and an air pump, which can adjust the suction strength and frequency as needed. The main function of the controllable suction head 50 is to adsorb and release the manifold 60 and to complete precise positional movement under the action of the drive device. By controlling the air intake and exhaust of the air passage of the controllable suction head 50, the gripping and release of the manifold 60 by the controllable suction head 50 can be achieved.

[0069] In some embodiments, the controllable suction head 50 can be replaced with other types of gripping devices, such as grippers or vacuum suction cups, to suit the needs of different workpieces.

[0070] In this embodiment, the manifold transfer mechanism connects the bracket 20 between two frames 10. The bracket 20 can be slidably connected to the frame 10 with the extension direction of the frame 10 as the first direction. The first mounting base 30 is slidably connected to the bracket 20 with the extension direction of the bracket 20 as the second direction. The second mounting base 40 is slidably connected to the first mounting base 30 with the third direction. This enables the controllable suction head 50 to move in the horizontal and vertical directions. Compared with the traditional transmission structure of a single frame or track, this manifold transfer mechanism can accommodate the transfer of longer manifolds and can better adapt to equipment vibration, reduce the vibration impact on the suction head, and has higher stability.

[0071] Multiple controllable suction heads 50 are arranged along the second direction on the second mounting base 40, with the controllable suction heads 50 facing the third direction. The third driving device 73 directly drives the second mounting base 40 to move vertically to pick up or release the busbar 60. During the process of picking up or releasing the busbar, there is no need to move the bracket 20 and the first mounting base 30, which ensures the overall stability of the mechanism, further reduces the impact of vibration on the suction cup, ensures accurate positioning of the suction cup and the busbar 60, improves the transfer accuracy of the busbar 60, and also improves the welding quality of the busbar 60.

[0072] In one embodiment, the second mounting base 40 includes a connecting plate 41 and a mounting plate 42. The connecting plate 41 is slidably connected to the first mounting base 30. Specifically, the connecting plate 41 is connected to two third guide rails 31. A third drive device 73 is mounted on the first mounting base 30, and the output end of the third drive device 73 is connected to the connecting plate 41.

[0073] Mounting plate 42 is detachably connected to connecting plate 41. Mounting plate 42 is perpendicular to connecting plate 41. Mounting plate 42 has multiple mounting holes 421. Controllable suction head 50 is installed in the mounting holes 421 and extends out of the surface of mounting plate 42, ensuring that each set of controllable suction head 50 is flush with and contacts the manifold 60 at the same time.

[0074] like Figure 2 and Figure 3 As shown, the mounting plate 42 is arranged parallel to the bracket 20, and the mounting holes 421 extend in the direction of extension of the mounting plate 42. At least two controllable suction heads 50 are provided in each mounting hole 421 so that the position of the controllable suction head 50 in the mounting hole 421 is adjustable.

[0075] like Figure 3 As shown, in one embodiment, the mounting plate 42 is a single elongated plate with multiple controllable suction heads 50. All the controllable suction heads 50 on the elongated plate form a suction head assembly, which corresponds to a busbar 60 to pick up the busbar 60. This structure is used when only one busbar 60 needs to be moved at a time, and is generally used for welding and moving busbars on both sides of the battery.

[0076] like Figure 2 As shown, in one embodiment, the mounting plate 42 consists of two parallel elongated plates connected by ribs 422. Each elongated plate is provided with a set of suction head assemblies. This structure is used when two busbars 60 need to be moved at one time, and is generally used for welding and moving busbars on the edge and center of the battery.

[0077] Of course, in some embodiments, multiple busbars 60 need to be transported at one time, and the mounting plate 42 can be configured as multiple corresponding elongated plates, so the shape of the mounting plate 42 is not limited to a single shape.

[0078] like Figure 2 As shown, a support member 43 is provided on one side of the connecting plate 41. The support member 43 connects to the rib plate 422, which is located at the angle between the connecting plate 41 and the mounting plate 42, serving to connect and support, thereby improving the structural strength of the second mounting base 40.

[0079] Example 2

[0080] This embodiment provides a welding device used in a stacking welding machine. The welding device includes a busbar transfer mechanism and a welding mechanism mentioned in the above embodiment. The busbar 60 is transferred to the welding station to contact the welding strip of the battery cell. The welding mechanism is used to weld the busbar 60 to the welding strip of the battery cell.

[0081] This welding device can precisely transport the busbar 60, ensuring the welding quality of the busbar 60 and the solar cell strip, and improving the production efficiency of photovoltaic modules.

[0082] Example 3

[0083] This embodiment provides a shingled welding machine for the production of photovoltaic modules. The shingled welding machine includes the busbar transfer mechanism or welding device mentioned in the above embodiments. The shingled welding machine has all the advantages mentioned in the above embodiments, which will not be repeated here.

[0084] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through 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. "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.

[0085] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model 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 of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A busbar transfer mechanism, characterized by, The application relates to a rack (10) for a busbar (60) manufacturing machine, comprising: two racks (10) arranged in parallel; a support (20) extended from one rack (10) to the other rack (10) and slidably connected to the racks (10) in the extending direction of the racks (10) as a first direction, the support (20) being connected with a first driving device (71) for driving the support (20); a first mounting base (30) slidably connected to the support (20) in the extending direction of the support (20) as a second direction and connected with a second driving device (72) for driving the first mounting base (30); a second mounting base (40) slidably connected to the first mounting base (30) in a third direction perpendicular to the first direction and the second direction respectively and connected with a third driving device (73) for driving the second mounting base (40); at least one group of suction head assemblies, the suction head assemblies comprising a plurality of controllable suction heads (50) arranged on the second mounting base (40) in the second direction, the controllable suction heads (50) being directed towards the third direction for sucking or releasing the busbar (60).

2. The bus bar transfer mechanism of claim 1, wherein The second mounting base (40) comprises: a connecting plate (41) slidably connected to the first mounting base (30), the connecting plate (41) being connected with the third driving device (73); a mounting plate (42) detachably connected to the connecting plate (41), the mounting plate (42) being provided with a plurality of mounting holes (421), the controllable suction heads (50) being mounted in the mounting holes (421) and extending out of the surface of the mounting plate (42).

3. The bus bar transfer mechanism of claim 2, wherein, The mounting plate (42) is arranged in parallel to the support (20), the mounting holes (421) extend in the extending direction of the mounting plate (42), at least two controllable suction heads (50) are arranged in each mounting hole (421), and the positions of the controllable suction heads (50) in the mounting holes (421) are adjustable.

4. The bus bar transfer mechanism of claim 3, wherein The mounting plate (42) comprises a long strip-shaped plate, and one group of the suction head assemblies is arranged on the long strip-shaped plate.

5. The bus bar transfer mechanism of claim 3, wherein The mounting plate (42) comprises two long strip-shaped plates arranged in parallel and connected by a rib plate (422), and one group of the suction head assemblies is arranged on each long strip-shaped plate.

6. The bus bar transfer mechanism of claim 5, wherein, The mounting plate (42) is arranged perpendicularly to the connecting plate (41), and a support (43) is arranged on one side of the connecting plate (41), and the support (43) is connected to the rib plate (422).

7. The bus bar transfer mechanism according to any one of claims 1 to 6, characterized in that, The support (20) comprises two horizontal beams (201) arranged in parallel and in an up-down mode, and the two horizontal beams (201) are fixedly connected by a rib column (202), and the two ends of the horizontal beams (201) are slidably connected to a first track (11) arranged in the first direction on the rack (10) by a hoisting piece; The first driving device (71) is mounted on the rack (10) and coupled to the hoisting piece to drive the hoisting piece to slide along the first track (11).

8. The bus bar transfer mechanism of claim 7, wherein, Two second rails (23) arranged along the second direction are respectively arranged on the two beams (201), and the first mounting seat (30) is connected with the two second rails (23) on the two beams (201) respectively; The second driving device (72) is mounted on the beam (201) and is coupled with the first mounting seat (30) to drive the first mounting seat (30) to slide along the second rail (23).

9. The bus bar transfer mechanism of claim 8, wherein, Two groups of third rails (31) arranged along the third direction are arranged on the first mounting seat (30), and the second mounting seat (40) is connected with the two groups of third rails (31) respectively; The third driving device (73) is mounted on the first mounting seat (30) and is coupled with the second mounting seat (40) to drive the second mounting seat (40) to slide along the third rail (31).

10. A welding device characterized by, Comprise: The bus bar transfer mechanism according to any one of claims 1 to 9 is used for transferring the bus bar (60) to a welding station to contact with a welding ribbon of a battery piece; The welding mechanism is used for welding the bus bar (60) and the welding ribbon.

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