High-speed welding equipment for battery pack

Abstract

The invention relates to battery pack high-speed welding equipment which comprises a transferring mechanism, a welding mechanism, a welding mechanism and a welding mechanism. The battery feeding mechanism is configured to feed batteries to the positioning seat; the rotating disc is rotationally arranged above the first welding station, a plurality of clamping seats are uniformly arranged on the rotating disc in the circumferential direction, and when the rotating disc rotates, the clamping seats are sequentially aligned with the first welding station; the feeding and cutting mechanism is arranged adjacent to the rotary table and comprises a feeding assembly for conveying the continuous strip to the clamping station and a cutting assembly for cutting the strip into the connecting pieces in a fixed-length mode; and the welding mechanism is arranged adjacent to the transferring mechanism, and the welding mechanism is configured to be close to or far away from the first welding station so as to weld the connecting piece located on the clamping base to the battery.

Description

Technical Field

[0001] The present invention relates to the field of battery manufacturing, and more particularly, to a high-speed welding device for battery packs. Background Art

[0002] With the rapid development of the new energy industry, battery pack welding equipment faces the production requirements of high efficiency and high precision. In the production process of battery packs, it is necessary to cut connecting pieces into fixed lengths and weld them between multiple batteries to achieve the electrical connection of the battery packs. In the prior art, some devices use traditional linear feeding methods to feed the connecting pieces, which have problems such as large feeding positioning deviations, mismatched cutting and welding beats, etc., resulting in limited production speeds, difficulty in achieving continuous feeding and accurate alignment, and easy generation of cumulative errors in the secondary positioning after the connecting pieces are cut, which easily cause defects such as false soldering and misalignment. Summary of the Invention

[0003] The purpose of the present invention is to provide a high-speed welding device for battery packs, which can achieve the streamlined operation of continuous cutting, accurate positioning and multi-station synchronous welding of connecting pieces, thereby breaking through the production efficiency bottleneck of existing devices and ensuring the consistency of welding quality.

[0004] A high-speed welding device for battery packs includes: a transfer mechanism, including a plurality of positioning seats for placing batteries, and a first welding station is provided on the transfer path of the transfer mechanism; a battery loading mechanism configured to load batteries onto the positioning seats; a turntable rotatably provided above the first welding station, and a plurality of clamping seats are arranged at equal intervals along the circumferential direction of the turntable, and when the turntable rotates, each clamping seat is aligned with the first welding station in sequence; a feeding and cutting mechanism provided adjacent to the turntable, including a feeding component for conveying a continuous strip to a clamping station and a cutting component for cutting the strip into fixed-length connecting pieces; and a welding mechanism provided adjacent to the transfer mechanism, and the welding mechanism is configured to be able to approach or move away from the first welding station to weld the connecting pieces located on the clamping seats to the batteries.

[0005] In the above technical solution, the transfer mechanism can transfer the batteries to be welded. At the same time, the feeding and cutting mechanism cuts the connecting pieces into a fixed length and feeds them to the clamping seats on the turntable. Then the turntable rotates to transfer the connecting pieces to the welding points, achieving the synchronous feeding and transfer of the batteries and the connecting pieces, eliminating the waiting gaps in the processes, realizing the continuity of the production rhythm, and improving the welding efficiency. The feeding and cutting mechanism is arranged adjacent to the turntable. The cut connecting pieces are directly clamped and transferred by the clamping seats, without the need for secondary positioning, eliminating the positioning errors of the traditional transfer method and avoiding the deformation risks caused by multiple positionings of the thin sheet materials. When the welding mechanism moves to the first welding station, it can weld the connecting pieces and the batteries. When it retreats, it creates space for the flow of the batteries, further ensuring the continuity of the production rhythm, while ensuring stable welding pressure and avoiding false welding. The linear trajectory of the transfer mechanism and the circular motion of the turntable cooperate with each other. When the battery enters the welding position, the clamping seat of the turntable just rotates to the welding position, which is beneficial to controlling the production rhythm and makes the layout more reasonable. Compared with the traditional linear layout equipment, the occupied space is greatly reduced, forming a highly integrated and efficient welding system.

[0006] Further, the feeding and cutting mechanism further includes a position correction component and a driving component. The position correction component is arranged adjacent to the outer periphery of the turntable, and the driving component is configured to simultaneously drive the feeding component, the cutting component, and the position correction component to act periodically.

[0007] In the above technical solution, the position correction component can correct the position and posture of the connecting pieces on the clamping seats, thereby ensuring the welding accuracy and consistency. The driving component can synchronously drive the feeding component, the cutting component, and the position correction component to move periodically, realizing the simultaneous driving of multiple actions by a single power source. While reducing the equipment cost, it avoids the timing deviation caused by multiple power sources and ensures the consistency of the production timing.

[0008] Further, the feeding component includes a feeding wheel, a pressure wheel, a one-way bearing, and a first swing arm assembly. The pressure wheel is configured to press the connecting piece against the circumferential surface of the feeding wheel. The feeding wheel is connected to the first swing arm assembly through the one-way bearing, and the first swing arm assembly is configured to drive the feeding wheel to rotate a preset angle periodically to drive the connecting piece to move.

[0009] In the above technical solution, by using the cooperation of the one-way bearing and the first swing arm assembly, the swing of the first swing arm assembly is converted into the rotation angle of the feeding wheel, realizing the periodic feeding of the strip material and ensuring the stability of the fixed-length feeding.

[0010] Further, the cutting component includes a fixed knife seat and a movable knife seat. The fixed knife seat is arranged adjacent to the turntable, and the movable knife seat is configured to approach or move away from the fixed knife seat periodically to cut the connecting piece.

[0011] In the above technical solution, the periodic linear motion of the movable tool block can achieve continuous cutting of the connecting piece, while matching the production rhythm of feeding and clamping to ensure the overall efficiency.

[0012] Further, the position correction assembly includes a slider, a shaping jaw, and a second swing arm assembly. The slider is configured to be slidable to approach or move away from the turntable. The shaping jaw is mounted on the slider. The slider is connected to the second swing arm assembly. The second swing arm assembly is configured to drive the slider to perform periodic linear reciprocating motion. When the slider approaches the turntable, the shaping jaw clamps and adjusts the position of the connecting piece. When the slider moves away from the turntable, the shaping jaw opens.

[0013] In the above technical solution, the linear reciprocating motion of the slider and the shaping jaw cooperates with the rotation of the turntable. The shaping jaw corrects the connecting piece when the clamping seat rotates in place, and eliminates the deviation of the position of the connecting piece through mechanical limit to ensure the consistency of each welding.

[0014] Further, the driving assembly includes a main driving wheel, a driving shaft, a first cam, and a first eccentric wheel. The main driving wheel is coaxially connected to the first cam and the first eccentric wheel through the driving shaft. The first cam is configured to rotate and drive the first swing arm assembly to perform periodic motion. The first eccentric wheel is configured to rotate and drive the movable tool block and the second swing arm assembly to perform periodic motion simultaneously.

[0015] In the above technical solution, the main driving wheel realizes single-axis multi-process driving through the coaxially arranged cam and eccentric wheel, converts the first swing arm assembly, the movable tool block and the second swing arm assembly into mechanical linkages that cooperate with each other, and eliminates the timing error through the transmission of the driving shaft to improve the coordination of the system actions.

[0016] Further, a first ejector rod is provided on one side of the movable tool block close to the turntable. When the movable tool block approaches the fixed tool block, the first ejector rod pushes the clamping seat to clamp the connecting piece.

[0017] In the above technical solution, the first ejector rod is linked with the movable tool block, and the clamping seat is locked synchronously during the cutting action. This structure fixes the connecting piece instantly at the moment when the cutting is completed, avoiding the displacement that may occur in the traditional step-by-step operation.

[0018] Further, the welding mechanism includes a sliding seat provided on one side of the transfer mechanism, a welding assembly provided on the sliding seat, and a pushing assembly provided on the other side of the transfer mechanism. The sliding seat is configured to be slidable to approach or move away from the transfer mechanism. The welding assembly is configured to weld the connecting piece to the battery. The pushing assembly is configured to push the battery from the other side during welding.

[0019] In the above technical solution, the welding assembly and the pushing assembly form a double-sided clamping structure, which provides double-sided positioning for the battery during welding, avoids battery displacement caused by welding pressure, and ensures the relative position stability between the connecting piece and the battery during the welding process.

[0020] Furthermore, the welding assembly includes a first welding unit, a second welding unit, and a shaping unit. The first welding unit is opposite to the first welding station. The transfer mechanism is further provided with a second welding station opposite to the second welding unit. The shaping unit is arranged between the first welding unit and the second welding unit.

[0021] In the above technical solution, the shaping unit is arranged between the two welding positions. By correcting the connecting piece after the first welding, the consistency during the second welding is ensured, and the welding quality is improved.

[0022] Furthermore, the first welding unit includes a second ejector rod. When the sliding seat approaches the transfer mechanism, the second ejector rod pushes the clamping seat to open the clamp.

[0023] In the above technical solution, the second ejector rod is linked with the welding action, and automatically triggers the opening of the clamping seat when the welding assembly moves into place. This structure combines the welding execution and the clamping release into a single action, avoids the additional clamp-opening drive mechanism in traditional equipment, and improves the reliability of action connection.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: The transfer mechanism can transfer the battery to be welded. At the same time, the feeding and cutting mechanism cuts the connecting piece into a fixed length and feeds it to the clamping seat on the turntable. The turntable then rotates to transfer the connecting piece to the welding point, realizing the synchronous feeding and transfer of the battery and the connecting piece, eliminating the waiting gap between processes, realizing the continuity of the production rhythm, and improving the welding efficiency. The feeding and cutting mechanism is arranged adjacent to the turntable. The cut connecting piece is directly clamped and transferred by the clamping seat without secondary positioning, eliminating the positioning error of the traditional transfer method and avoiding the deformation risk of the thin sheet material during multiple positionings. The welding mechanism can weld the connecting piece and the battery when moving to the first welding station, and retreats to make room for the battery to flow, further ensuring the continuity of the production rhythm, while ensuring stable welding pressure and avoiding false welding. The linear trajectory of the transfer mechanism and the circular motion of the turntable cooperate with each other. When the battery enters the welding position, the clamping seat of the turntable just rotates to the welding position, which is beneficial to controlling the production rhythm and makes the layout more reasonable. Compared with the traditional linear layout equipment, the occupied space is greatly reduced, forming a highly integrated and efficient welding system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of the high-speed welding equipment for battery packs according to an embodiment of the present invention.

[0026] Figure 2 Schematic structural diagram of the transfer mechanism and the battery loading structure according to an embodiment of the present invention.

[0027] Figure 3 Schematic structural diagram of the turntable according to an embodiment of the present invention.

[0028] Figure 4 Schematic structural diagram of the turntable and the feeding and cutting mechanism according to an embodiment of the present invention.

[0029] Figure 5 Schematic structural diagram of the feeding and cutting mechanism according to an embodiment of the present invention.

[0030] Figure 6 Schematic structural diagram of the feeding and cutting mechanism from another angle according to an embodiment of the present invention.

[0031] Figure 7 Schematic structural diagram of the position correction assembly according to an embodiment of the present invention.

[0032] Figure 8 Schematic structural diagram of the welding assembly according to an embodiment of the present invention.

[0033] Figure 9 Schematic structural diagram of the pushing component according to an embodiment of the present invention.

[0034] Explanation of the reference numerals in the drawings: Transfer mechanism 1, positioning seat 11, first welding station 12, second welding station 13, battery loading mechanism 2, magazine 21, runner 22, turntable 3, clamping seat 31, seat body 311, swing rod 312, feeding and cutting mechanism 4, feeding component 41, feeding wheel 411, pressing wheel 412, one-way bearing 413, first swing arm assembly 414, cutting component 42, fixed knife seat 421, movable knife seat 422, first ejector rod 4221, position correction assembly 43, slider 431, shaping jaw 432, second swing arm assembly 433, driving component 44, main driving wheel 441, driving shaft 442, first cam 443, first eccentric wheel 444, welding mechanism 5, sliding seat 51, welding assembly 52, first welding unit 521, welding driving member 5211, welding head 5212, second ejector rod 5213, second welding unit 522, shaping unit 523, pushing component 53, ejector rod 531, vertical plate 6. Detailed implementation manners

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Apparently, the described embodiments are some, but not all, of the embodiments of this application. Components of the embodiments of this application usually described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of this application claimed, but merely represents selected embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of this application without creative efforts belong to the scope of protection of this application.

[0037] Please refer to Figure 1 , in a preferred embodiment, the high-speed welding device for a battery pack of the present invention mainly includes a transfer mechanism 1, a battery loading mechanism 2, a turntable 3, a feeding and cutting mechanism 4, and a welding mechanism 5. Among them, the transfer mechanism 1 is used to transfer the batteries to be welded, including a number of positioning seats 11 for placing the batteries. A first welding station 12 is provided on the transfer path of the transfer mechanism 1. The battery loading mechanism 2 is configured to load the batteries onto the positioning seats 11. The turntable 3 is rotatably arranged above the first welding station 12. A number of clamping seats 31 are evenly arranged along the circumference of the turntable 3. When the turntable 3 rotates, each clamping seat 31 is aligned with the first welding station 12 in sequence. The feeding and cutting mechanism 4 is arranged adjacent to the turntable 3, including a feeding component 41 for conveying a continuous strip to a clamping station and a cutting component 42 for cutting the strip into connecting pieces of a fixed length. The welding mechanism 5 is arranged adjacent to the transfer mechanism 1. The welding mechanism 5 is configured to be able to approach or move away from the first welding station 12 to weld the connecting pieces located on the clamping seats 31 to the batteries.

[0038] Please refer to Figure 2 , exemplarily, the transfer mechanism 1 is installed on a vertical plate 6. The transfer mechanism 1 adopts a strip-shaped conveying structure formed by connecting a number of positioning seats 11 end to end. Each positioning seat 11 is provided with a positioning groove for placing the battery. The first welding station 12 is arranged at a position close to the middle section of the transfer mechanism 1. The battery loading mechanism 2 is arranged at the starting end of the transfer mechanism 1. In specific implementation, the battery loading mechanism 2 can adopt an existing battery loading device. For example, the battery loading mechanism 2 includes a vertically arranged storage bin 21. A runner 22 is provided at the lower end of the storage bin 21. A groove body matching the diameter of the battery is formed on the outer circumference of the runner 22. The runner 22 can rotate to sequentially place the batteries from the storage bin 21 onto the corresponding positioning seats 11. In this embodiment, there are two battery loading mechanisms 2. The two batteries are electrically connected by a connecting piece to form a battery pack. In other possible embodiments, the number of battery loading mechanisms 2 can be more than two, which can be specifically set according to the number of batteries in the battery pack.

[0039] Please refer to Figure 3 , the turntable 3 is rotatably arranged on the vertical plate 6, and the turntable 3 is located above the first welding station 12. The rotating shaft of the turntable 3 is parallel to the transfer plane of the transfer mechanism 1. The clamping seats 31 are evenly distributed along the circumference of the turntable 3. The clamping seat 31 includes a seat body 311 and a swing rod 312. The middle of the swing rod 312 is rotatably connected to the seat body 311. The two ends of the swing rod 312 respectively form a clamping end and an open-clamping end. Among them, the clamping end is located at one end of the seat body 311 away from the center of the turntable 3, and the open-clamping end is located at one end of the seat body 311 close to the center of the turntable 3. By pushing the clamping end or the open-clamping end, the swing of the swing rod 312 can be controlled, so as to clamp or open-clamp the connecting piece. In this embodiment, the clamping end partially extends out of the edge of the turntable 3, so as to facilitate clamping the connecting piece and at the same time facilitate the alignment of the connecting piece with the battery on the positioning seat 11.

[0040] To facilitate the understanding of the above technical solution, the working principle thereof is described as follows: First, the connecting piece is a continuous strip. The feeding assembly 41 conveys the strip to the clamping seat 31, and then the cutting assembly 42 cuts the strip to form a connecting piece of a fixed length. After the clamping seat 31 clamps the connecting piece, the turntable 3 rotates by a preset angle in sequence until the connecting piece on the clamping seat 31 is opposite to the battery on the positioning seat 11 at the first welding station 12. At this time, the welding mechanism 5 moves closer and welds the connecting piece to the battery. At the same time, the clamping seat 31 opens the clamp. After the welding is completed, the battery together with the connecting piece continues to move.

[0041] It can be seen from the above technical solution that the transfer mechanism 1 can transfer the battery to be welded. At the same time, the feeding and cutting mechanism 4 cuts the connecting piece into a fixed length and feeds it to the clamping seat 31 on the turntable 3. The turntable 3 then rotates to transfer the connecting piece to the welding point, realizing the synchronous feeding and transfer of the battery and the connecting piece, eliminating the waiting gap of the process, realizing the continuity of the production rhythm, and improving the welding efficiency. The feeding and cutting mechanism 4 is arranged adjacent to the turntable 3. The cut connecting piece is directly clamped and transferred by the clamping seat 31 without secondary positioning, eliminating the positioning error of the traditional transfer method and avoiding the deformation risk of the thin sheet material caused by multiple positioning. When the welding mechanism 5 moves to the first welding station 12, it can weld the connecting piece and the battery. When it retreats, it vacates space for the battery to flow, further ensuring the continuity of the production rhythm, and at the same time ensuring the stability of the welding pressure and avoiding false welding. The linear trajectory of the transfer mechanism 1 and the circular motion of the turntable 3 cooperate with each other. When the battery enters the welding position, the clamping seat 31 of the turntable 3 just rotates to the welding position, which is beneficial to controlling the production rhythm and making the layout more reasonable. Compared with the traditional linear layout equipment, the occupied space is greatly reduced, forming a highly integrated and efficient welding system.

[0042] Please refer to Figures 4 to 6, the feeding and cutting mechanism 4 further includes a position correction component 43 and a driving component 44. The position correction component 43 is adjacently disposed on the outer periphery of the turntable 3, and the driving component 44 is configured to simultaneously drive the feeding component 41, the cutting component 42, and the position correction component 43 to act periodically. The position correction component 43 can correct the pose of the connecting piece on the clamping seat 31, thereby ensuring the accuracy and consistency of welding. The driving component 44 can synchronously drive the feeding component 41, the cutting component 42, and the position correction component 43 to perform periodic motion, realizing the simultaneous driving of multiple actions by a single power source. While reducing the equipment cost, it avoids the timing deviation caused by multiple power sources and ensures the consistency of the production timing.

[0043] The feeding component 41 includes a feeding wheel 411, a pressing wheel 412, a one-way bearing 413, and a first swing arm assembly 414. The pressing wheel 412 is configured to press the connecting piece against the circumferential surface of the feeding wheel 411. The feeding wheel 411 is connected to the first swing arm assembly 414 through the one-way bearing 413, and the first swing arm assembly 414 is configured to drive the feeding wheel 411 to rotate a preset angle periodically to drive the connecting piece to move.

[0044] Exemplarily, the axial directions of the feeding wheel 411 and the pressing wheel 412 are parallel. The outer periphery of the feeding wheel 411 is provided with teeth to increase the friction with the strip. The strip passes between the feeding wheel 411 and the pressing wheel 412, and the pressing wheel 412 presses the strip against the circumferential surface of the feeding wheel 411. The first swing arm assembly 414 is connected to the driving component 44, and the driving component 44 can drive the first swing arm assembly 414 to swing reciprocally, thereby driving the feeding wheel 411 to rotate a preset angle. The feeding wheel 411 is matched with the first swing arm assembly 414 by the one-way bearing 413. By converting the swing of the first swing arm assembly 414 into the rotation angle of the feeding wheel 411, the periodic feeding of the strip is realized, and the stability of the fixed-length feeding is ensured.

[0045] The cutting component 42 includes a fixed tool holder 421 and a movable tool holder 422. The fixed tool holder 421 is disposed adjacent to the turntable 3, and the movable tool holder 422 is configured to periodically approach or move away from the fixed tool holder 421 to cut the connecting piece. In specific implementation, the movable tool holder 422 can cut the strip by blanking. The periodic linear motion of the movable tool holder 422 can realize the continuous cutting of the connecting piece, and at the same time match the production rhythm of feeding and clamping to ensure the overall efficiency.

[0046] Please refer to Figure 7, the position correction assembly 43 includes a slider 431, a shaping jaw 432, and a second swing arm assembly 433. The slider 431 is configured to slide closer to or away from the turntable 3. The shaping jaw 432 is mounted on the slider 431. The slider 431 is connected to the second swing arm assembly 433. The second swing arm assembly 433 is configured to drive the slider 431 to perform periodic linear reciprocating motion. When the slider 431 approaches the turntable 3, the shaping jaw 432 clamps and adjusts the position of the connecting piece. When the slider 431 moves away from the turntable 3, the shaping jaw 432 opens. Exemplarily, the shaping jaw 432 includes three clamping blocks, two of which are arranged opposite to each other for clamping to center the connecting piece, and the other clamping block is located between the two clamping blocks for pushing the connecting piece from the end of the connecting piece so that the length of the connecting piece extending out of the clamping seat 31 remains consistent. The second swing arm assembly 433 includes a rotatable rod. One end of the rod is rotatably connected to the slider 431, and the other end is linked with the driving assembly 44. The driving assembly 44 can drive the rod to rotate reciprocally. The rod drives the slider 431 to perform linear reciprocating movement, and then drives the shaping jaw 432 to clamp and open. The linear reciprocating movement of the slider 431 and the shaping jaw 432 cooperates with the rotation of the turntable 3. The shaping jaw 432 corrects the connecting piece when the clamping seat 31 rotates in place, eliminates the deviation of the position of the connecting piece through mechanical limit, and ensures the consistency of each welding.

[0047] Please refer to Figures 4 to 6 , the driving assembly 44 includes a main driving wheel 441, a driving shaft 442, a first cam 443, and a first eccentric wheel 444. The main driving wheel 441 is coaxially connected to the first cam 443 and the first eccentric wheel 444 through the driving shaft 442. The first cam 443 is configured to rotate and drive the first swing arm assembly 414 to perform periodic motion. The first eccentric wheel 444 is configured to rotate and drive the movable tool holder 422 and the second swing arm assembly 433 to perform periodic motion simultaneously. Exemplarily, the main driving wheel 441 can rotate under the drive of the driving device, and drive the first cam 443 and the first eccentric wheel *444 to rotate synchronously through the driving shaft 442. The first cam 443 can periodically push the first swing arm assembly 414, thereby driving the feeding assembly 41 to feed periodically. An activity seat linked to it is provided on the outer periphery of the first eccentric wheel 444. The first eccentric wheel 444 can convert rotation into linear reciprocating movement through the activity seat. The second swing arm assembly 433 and the movable tool holder 422 are both linked to the activity seat, thereby realizing the periodic cutting action of the movable tool holder 422 and the periodic clamping of the shaping jaw 432 driven by the second swing arm assembly 433. The main driving wheel 441 realizes single-axis multi-process drive through the coaxially arranged cam and eccentric wheel, converts the first swing arm assembly 414, the movable tool holder 422 and the second swing arm assembly 433 into mechanical linkages that cooperate with each other, and eliminates the timing error through the transmission of the driving shaft 442, improving the coordination of the system actions.

[0048] It should be noted that in this embodiment, the drive device for driving the main drive wheel 441 uses a motor, the output end of which is connected to an output shaft. The output shaft drives the main drive wheel 441 through a transmission pulley and a belt. At the same time, the output shaft is connected to the transfer mechanism 1, the battery loading mechanism 2, the turntable 3, and the welding mechanism 5 through a transmission structure. This achieves the goal of driving the equipment through a single power source, effectively reducing costs and ensuring production cycle time. In other possible embodiments, the drive device can be a plurality of independent power sources, for example, using an independent motor to drive the column drive wheel rotation, and using independent power sources to drive the transfer mechanism 1, the battery loading mechanism 2, the turntable 3, and the welding mechanism 5 respectively.

[0049] In this embodiment, a first push rod 4221 is provided on the side of the movable knife seat 422 near the turntable 3. When the movable knife seat 422 approaches the fixed knife seat 421, the first push rod 4221 pushes the clamping seat 31 so that the clamping seat 31 clamps the connecting piece. Specifically, the first push rod 4221 and the clamping end of the swing rod 312 are opposite each other in space. When the movable knife seat 422 approaches the fixed knife seat 421, the first push rod 4221 and the movable knife seat 422 work together to push the clamping end, synchronously triggering the locking of the clamping seat 31 during the cutting action. This structure completes the fixing of the connecting piece at the moment the cutting is completed, avoiding the displacement that may occur in traditional step-by-step operations.

[0050] Please refer to Figure 8 The welding mechanism 5 includes a sliding seat 51 located on one side of the transfer mechanism 1, a welding assembly 52 located on the sliding seat 51, and a pushing assembly 53 located on the other side of the transfer mechanism 1. The sliding seat 51 is configured to slide toward or away from the transfer mechanism 1. The welding assembly 52 is configured to weld the connecting piece to the battery, and the pushing assembly 53 is configured to push the battery from the other side during welding. The welding assembly 52 and the pushing assembly 53 form a bidirectional clamping structure, which provides bidirectional positioning for the battery during welding, preventing battery displacement caused by welding pressure and ensuring a stable relative position between the connecting piece and the battery during welding.

[0051] Specifically, the welding assembly 52 includes a first welding unit 521, a second welding unit 522, and a shaping unit 523. The first welding unit 521 faces the first welding station 12. The transfer mechanism 1 is further provided with a second welding station 13 facing the second welding unit 522. The shaping unit 523 is disposed between the first welding unit 521 and the second welding unit 522. Exemplarily, the first welding unit 521 includes a welding driving member 5211 and a welding head 5212. The welding driving member 5211 can adopt an existing linear driving device, such as a cylinder. The welding driving member 5211 drives the welding head 5212 to move closer to the position to be welded. The second welding unit 522 can adopt the same structure as the first welding unit 521, and the shaping unit 523 can adopt the same structure as the shaping jaw 432, which will not be elaborated here. The shaping unit 523 is arranged between the two welding positions. By correcting the connecting piece after the first welding, the consistency during the second welding is ensured, and the welding quality is improved.

[0052] Please refer to Figure 9 , the pushing assembly 53 includes a pushing rod 531. The pushing rod 531 faces the first welding station 12 and the second welding station 13. During welding, the pushing rod 531 can slide and push the other end of the battery, thereby providing support for welding and ensuring the stability of welding.

[0053] In this embodiment, the first welding unit 521 includes a second ejector rod 5213. When the sliding seat 51 approaches the transfer mechanism 1, the second ejector rod 5213 pushes the clamping seat 31 to open the clamp. The second ejector rod 5213 is linked with the welding action and automatically triggers the opening of the clamping seat 31 when the welding assembly 52 moves into place. This structure combines the welding execution and the clamping release into a single action, avoiding the additional clamp-opening driving mechanism in traditional equipment and improving the reliability of action connection.

[0054] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present invention.

[0055] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0056] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-speed welding device for a battery pack, characterized in that Comprising: A transfer mechanism, including a number of positioning seats for placing batteries, and a first welding station is provided on the transfer path of the transfer mechanism; A battery loading mechanism, which is configured to load the battery onto the positioning seat; A turntable, rotatably arranged above the first welding station, and a number of clamping seats are evenly arranged along the circumference of the turntable. When the turntable rotates, each clamping seat is aligned with the first welding station in sequence; A feeding and cutting mechanism, arranged adjacent to the turntable, including a feeding component for conveying a continuous strip to a clamping station and a cutting component for cutting the strip into connecting pieces of a fixed length; and A welding mechanism, arranged adjacent to the transfer mechanism, and the welding mechanism is configured to be able to approach or move away from the first welding station to weld the connecting piece located on the clamping seat to the battery.

2. The high-speed welding device for battery packs according to claim 1, characterized in that, The feeding and cutting mechanism further includes a position correction component and a driving component. The position correction component is arranged adjacent to the outer circumference of the turntable, and the driving component is configured to simultaneously drive the feeding component, the cutting component, and the position correction component to perform periodic actions.

3. The high-speed welding device for battery packs according to claim 2, wherein, The feeding component includes a feeding wheel, a pressing wheel, a one-way bearing, and a first swing arm assembly. The pressing wheel is configured to press the connecting piece against the circumferential surface of the feeding wheel. The feeding wheel is connected to the first swing arm assembly through the one-way bearing, and the first swing arm assembly is configured to drive the feeding wheel to rotate a preset angle periodically to drive the connecting piece to move.

4. The high-speed welding device for battery packs according to claim 3, characterized in that, The cutting component includes a fixed knife seat and a movable knife seat. The fixed knife seat is arranged adjacent to the turntable, and the movable knife seat is configured to approach or move away from the fixed knife seat periodically to cut the connecting piece.

5. The high-speed welding device for battery packs according to claim 4, characterized in that, The position correction component includes a slider, a shaping gripper, and a second swing arm assembly. The slider is configured to be slidable to approach or move away from the turntable. The shaping gripper is installed on the slider. The slider is connected to the second swing arm assembly, and the second swing arm assembly is configured to drive the slider to perform periodic linear reciprocating motion. When the slider approaches the turntable, the shaping gripper clamps and adjusts the position of the connecting piece. When the slider moves away from the turntable, the shaping gripper opens.

6. The high-speed welding device for battery packs according to claim 5, characterized in that The driving component includes a main driving wheel, a driving shaft, a first cam, and a first eccentric wheel. The main driving wheel is coaxially connected to the first cam and the first eccentric wheel through the driving shaft. The first cam is configured to rotate and drive the first swing arm assembly to perform periodic motion. The first eccentric wheel is configured to rotate and drive the movable knife seat and the second swing arm assembly to perform periodic motion simultaneously.

7. The high-speed welding device for battery packs according to claim 4, characterized in that, A first push rod is provided on the side of the movable knife seat close to the turntable. When the movable knife seat approaches the fixed knife seat, the first push rod pushes the clamping seat to clamp the connecting piece.

8. The high-speed welding device for battery packs according to claim 1, characterized in that, The welding mechanism includes a sliding seat arranged on one side of the transfer mechanism, a welding component arranged on the sliding seat, and a pushing component arranged on the other side of the transfer mechanism. The sliding seat is configured to be slidable to approach or move away from the transfer mechanism. The welding component is configured to weld the connecting piece to the battery, and the pushing component is configured to push the battery from the other side during welding.

9. The high-speed welding device for battery packs according to claim 8, wherein, The welding assembly includes a first welding unit, a second welding unit, and a shaping unit. The first welding unit is opposite to the first welding station. The transfer mechanism is further provided with a second welding station opposite to the second welding unit. The shaping unit is arranged between the first welding unit and the second welding unit.

10. The high-speed welding device for battery packs according to claim 9, characterized in that, The first welding unit includes a second ejector rod. When the sliding seat approaches the transfer mechanism, the second ejector rod pushes the clamping seat to open the clamp.

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