Welding mechanism for assembling lithium battery

Abstract

The utility model discloses a welding mechanism for assembling a lithium battery, which belongs to the technical field of lithium battery production equipment, aims to solve the problem that the existing welding process is tedious and long in period, and comprises a positioning component, a movable arm and a spot welding path adjusting component, the positioning assembly comprises a sliding seat, a lithium battery carrier plate mounted on the sliding seat and a clamping part arranged on the lithium battery carrier plate; the power end of the movable arm is connected with a spot welding machine facing the lithium battery carrier plate; the spot welding path adjusting assembly comprises a transmission part connected with the sliding base and a stirring piece arranged on the movable arm and matched with the transmission part. When the movable arm ascends, the shifting piece and the spot welding machine are driven to ascend at the same time, the shifting piece ascends to drive the transmission part to rotate, and the transmission part rotates to drive the sliding seat to move, so that the next electrode of the lithium battery is aligned with the spot welding machine. According to the utility model, a complex structure is not needed, the calibration process of repeated welding can be omitted, the electrode slice welding period is shortened, and the subsequent welding stability is improved.

Description

Technical Field

[0001] This utility model relates to a welding mechanism for lithium battery assembly, belonging to the technical field of lithium battery production equipment. Background Technology

[0002] During the assembly of lithium battery packs, nickel sheets are added to the electrodes, and then the electrodes are welded together using a spot welding machine. This connects each lithium battery in series, increasing the operating power of the lithium battery pack. Besides the spot welding machine, the clamping and positioning of the objects being welded also needs to be carefully considered to ensure potential quality risks. Existing lithium battery welding processes often use positioning mechanisms to position the batteries and their nickel sheets to achieve welding stability. However, the positioning mechanism disclosed in patent CN208977050U cannot be adjusted according to the welding path. Furthermore, many existing welding mechanisms require multi-directional CNC modules to meet the adjustment needs of cyclic welding. Although these multi-directional CNC modules offer high motion accuracy and good multi-axis linkage flexibility, the positioning mechanism must be calibrated before each welding operation to avoid overlapping mechanical errors after repeated positioning, resulting in a long adjustment cycle.

[0003] Secondly, existing spot welding machines typically rely on robotic arms for automated welding. While this method offers a high degree of automation, it also occupies a large space and is costly, limiting its applicability to large-scale lithium battery production lines. Therefore, existing lithium battery welding mechanisms suffer from cumbersome welding processes, low efficiency, and high equipment costs. Utility Model Content

[0004] Purpose of the utility model: The purpose of this utility model is to overcome the shortcomings of the prior art and provide a welding mechanism for lithium battery assembly. It does not require complex CNC mechanisms and high-cost robotic arms. By using a spot welding path adjustment component, the execution paths of the positioning component and the moving arm are integrated with high precision, enabling the positioning component and the spot welding machine to work together, eliminating the calibration process, shortening the cycle of subsequent electrode sheet welding, and improving the stability of subsequent welding.

[0005] To solve the above-mentioned technical problems, this utility model is implemented using the following technical solution:

[0006] A welding mechanism for assembling lithium batteries, comprising:

[0007] The positioning assembly includes a slide, a lithium battery carrier plate mounted on the slide, and a clamping part disposed on the lithium battery carrier plate;

[0008] A movable arm, the power end of which is connected to a spot welder facing the lithium battery carrier plate;

[0009] A spot welding path adjustment assembly includes a transmission part connected to a slide and a toggle element disposed on a movable arm and cooperating with the transmission part;

[0010] A lithium battery pack is placed on the lithium battery carrier plate. When the movable arm rises, it drives the actuating component and the spot welding machine to rise simultaneously. The rise of the actuating component drives the transmission unit to rotate. When the transmission unit rotates, it drives the slide to move, so that the next electrode of the lithium battery is aligned with the spot welding machine.

[0011] In the above solution, the positioning component clamps the lithium battery, aligning the lithium battery electrode side with the spot welding machine. The movable arm, being a single-axis type, eliminates the need for complex control structures, offering a streamlined and compact design suitable for applications in limited spaces. The spot welding path adjustment component works in conjunction with the movable arm and positioning component, driving the positioning component and spot welding machine to move synchronously. As the movable arm rises, it causes the toggle component and spot welding machine to rise simultaneously, causing the slide to move the lithium battery carrier plate. The distance the lithium battery carrier plate moves is equal to the distance between the lithium battery electrodes, ensuring that the next electrode automatically aligns with the spot welding machine after moving with the lithium battery carrier plate. This eliminates the need for positioning and calibration procedures as well as welding parameter calibration, shortening the welding cycle of subsequent electrode sheets and improving the stability of subsequent welding.

[0012] Optionally, it also includes a telescopic part, which includes a guide rail disposed on the slide, a top plate connected to one side of the lithium battery carrier plate, and a telescopic cylinder mounted on the slide.

[0013] The top plate is connected to the power end of the telescopic cylinder and is used to drive the lithium battery carrier plate to move relative to the slide along the guide rail, thereby adjusting the relative position of the lithium battery pack electrodes and the spot welding machine.

[0014] In the above scheme, the telescopic cylinder drives the lithium battery carrier plate to move along the guide rail relative to the slide. The lithium battery pack is placed on the lithium battery carrier plate, realizing the adjustment of the relative position of the lithium battery pack electrodes and the spot welding machine. After all the electrodes on one side of the lithium battery pack are welded, the telescopic cylinder is driven to move the battery pack horizontally so that the motor on the other side corresponds to the spot welding machine, thus meeting the double-sided cyclic welding requirements of the lithium battery pack.

[0015] Optionally, the clamping part includes a motor mounted on the lithium battery carrier plate, a gear connected to the power end of the motor, a rack assembly disposed on the lithium battery carrier plate, and a clamping plate connected to the outside of the rack assembly; the rack assembly includes a sliding frame mounted on the lithium battery carrier plate, and a first rack and a second rack respectively connected to both ends of the sliding frame.

[0016] The first rack and the second rack mesh with the gear respectively, and move in opposite directions on the sliding frame under the drive of the motor; the ends of the first rack and the second rack away from the gear are both connected to the clamping plate.

[0017] In the above scheme, the motor drives the gear to rotate, and after the gear rotates, it drives the first rack and the second rack to slide along the sliding frame. When the first rack and the second rack slide, they simultaneously drive the two clamping plates to move closer or further away. During welding, the motor drives the two clamping plates to move closer to clamp and limit the battery. After welding is completed, the motor drives the two clamping plates to move further away to facilitate the unloading of the battery.

[0018] Optionally, the movable arm includes a drive component, a cross plate disposed at the power end of the drive component, and a side plate mounted on the side of the cross plate near the transmission part.

[0019] The side plate is used to support the actuating element and drives the actuating element to rise with the output of the power end of the drive element. When the actuating element rises, it applies force to the transmission part.

[0020] In the above scheme, the driving component is a hydraulic cylinder mounted on the support assembly, which can drive the spot welding machine to move linearly and simultaneously input power to the transmission unit through the actuating component; the horizontal plate is connected to the power end and extends to the lithium battery carrier plate, enabling the spot welding machine to face the lithium battery on the lithium battery carrier plate; the side plate is installed close to the transmission unit, which can cooperate with the transmission unit to convert the linear force of the driving component into rotational force, and transmit it to the slide through the transmission unit, so that the sliding movement path and the lifting path of the spot welding machine are fully coordinated in time and space, shortening the calibration time before operation and improving the efficiency of cycle operation.

[0021] Optionally, the actuating element is connected to the side plate and close to the transmission part; the actuating element is movably mounted on the side plate through a connecting shaft, and a limiting block is provided on the downward side of the actuating element to limit the rotation angle and direction of the actuating element, so that it outputs power to the spline wheel as the side plate rises.

[0022] In the above scheme, the actuating component is an L-shaped plate movably connected to the side plate, with the connection fulcrum located at a right angle. When the actuating component rises, it actuates the spline and drives the spline wheel to rotate. When the actuating component descends, it is pushed open by the spline and rotates on its own, but does not drive the spline wheel to rotate. It automatically resets after the actuating component descends below the spline wheel. It can output power to the spline wheel in a cycle as the side plate rises and falls repeatedly, so as to adjust the slide to move continuously along the lead screw, so that all electrodes on one side of the lithium battery pack can be cyclically welded with the spot welding machine.

[0023] Optionally, the positioning component, the spot welding path adjustment component, and the movable arm are all mounted on the support component. The support component includes a base, a support plate mounted on the base, multiple guide rods inserted between the support plates, and a bracket mounted on the support plate and close to the movable arm.

[0024] In the above scheme, the support component provides support for the positioning component, the spot welding path adjustment component, and the movable arm, allowing the three to form a connected whole without the need for additional auxiliary equipment. Furthermore, the support plate and multiple guide rods limit and support the positioning component, ensuring that the slide's stroke always corresponds to the movable arm and the spot welding machine. The bracket is positioned close to the transmission unit and the movable arm, with the power input end of the transmission unit located on the bracket, thus enabling the transmission unit to cooperate with the actuating component and receive the power transmitted by the actuating component as the movable arm rises.

[0025] Optionally, the transmission unit includes a lead screw inserted into the support plate and connected to the slide, a rotating shaft mounted on the bracket, a splined wheel connected to the rotating shaft and corresponding to the actuating element, a first bevel gear disposed at the end of the lead screw, and a second bevel gear fitted on the rotating shaft and meshing with the first bevel gear.

[0026] In the above scheme, the first bevel gear is installed at the end of the lead screw that passes through the support plate, and the first bevel gear meshes with the second bevel gear on the bracket; the lead screw is also screwed to the slide, and the second bevel gear is connected to the splined wheel through the rotating shaft; thus, the splined wheel rotates under force when the actuating component rises, and the power drives the rotating shaft and the second bevel gear to rotate through the splined wheel. The second bevel gear transmits power to the first bevel gear, and the rotation of the second bevel gear drives the rotation of the first bevel gear. When the first bevel gear rotates, it drives the lead screw to rotate, thereby causing the slide to move along the lead screw and the guide rod. The movement accuracy can be designed according to the electrode spacing. By replacing different models of splined wheels, bevel gears, and lead screws, the overall device has high flexibility in assembly and disassembly and a simplified structure.

[0027] Optionally, the plurality of guide rods are symmetrically arranged on the slide block for supporting and limiting the slide block.

[0028] In the above scheme, multiple guide rods are slidably connected to the slide block to form a multi-rail support for the slide block, ensuring stability during the sliding process. At the same time, multiple guide rods are set on the same side and parallel to the lead screw, which can limit the movement of the slide block.

[0029] Optionally, a reset mechanism is provided on one side of the lead screw for adjusting the reset of the lithium battery carrier plate on the lead screw.

[0030] In the above scheme, the reset mechanism is a handwheel, which is located at the end of the lead screw away from the movable arm. After all the electrodes on one side of the lithium battery pack have been welded, the handwheel is turned to make the lead screw rotate in the opposite direction, thereby driving the slide to move in the opposite direction until the battery carrier plate returns to the initial position. Under the drive of the telescopic part, the starting point of the electrode on the other side of the lithium battery pack is aligned with the spot welding machine. Then the spot welding steps are repeated to complete the welding of all the electrodes of the lithium battery pack.

[0031] Beneficial effects: Compared with the prior art, this utility model has the following advantages:

[0032] 1. Without the need for complex CNC mechanisms, the execution paths of the positioning component and the movable arm are integrated through the spot welding path adjustment component, enabling the positioning component and the spot welding machine to work together. The movable arm rises, causing the toggle component and the spot welding machine to rise simultaneously, which in turn causes the slide to move the lithium battery carrier plate. The distance the lithium battery carrier plate moves is equal to the electrode spacing of the lithium battery, so that the next electrode automatically aligns with the spot welding machine after moving with the lithium battery carrier plate. This eliminates the positioning calibration process and the welding parameter calibration process, shortens the welding cycle of subsequent electrode sheets, and improves the stability of subsequent welding.

[0033] 2. The design of the clamping part with gears and racks fixes both sides of the lithium battery, which can improve the stability during subsequent welding and thus improve the welding quality; the telescopic part drives the lithium battery carrier plate to move along the guide rail relative to the slide, which can adjust the position of the electrodes on both sides of the battery so that they can correspond to the spot welding machine and meet the double-sided cyclic welding requirements of the lithium battery pack.

[0034] 3. The actuating component is movably connected to the power end of the movable arm. The movable arm adopts a single-axis movable arm, which does not require a complex control structure. The structure is simple and compact and can meet the application in small spaces. When the actuating component rises, it will actuate the spline and drive the spline wheel to rotate. When the actuating component descends, it will be pushed open by the spline and rotate on its own, but will not drive the spline wheel to rotate. It will automatically reset after the actuating component descends below the spline wheel. It can output power to the spline wheel in the repeated rising and falling cycle of the side plate to adjust the slide to move continuously along the lead screw, so that all electrodes on the lithium battery pack side can be cyclically welded with the spot welding machine. Attached Figure Description

[0035] Figure 1 This is a three-dimensional schematic diagram of the welding mechanism for lithium battery assembly in this embodiment;

[0036] Figure 2 This is a side perspective view of the welding mechanism for lithium battery assembly in this embodiment;

[0037] Figure 3 for Figure 1 Enlarged view of point A in the middle.

[0038] In the diagram: 1. Base; 2. Support plate; 3. Lead screw; 4. Guide rod; 5. Slide; 6. Lithium battery carrier plate; 7. Top plate; 8. Telescopic cylinder; 9. Sliding frame; 10. Motor; 11. Gear; 12. First rack; 13. Clamping plate; 14. First bevel gear; 15. Bracket; 16. Second bevel gear; 17. Splined wheel; 18. Spline; 19. Hydraulic cylinder; 20. Horizontal plate; 21. Spot welding machine; 22. Side plate; 23. Actuating component; 24. Handwheel; 25. Second rack. Detailed Implementation

[0039] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention. Example

[0040] This embodiment provides a welding mechanism for lithium battery assembly, such as... Figure 1 and Figure 2 The assembly includes a positioning component, a movable arm, and a spot welding path adjustment component, all of which are mounted on a support assembly. The positioning component includes a slide 5, a lithium battery carrier plate 6, and a clamping part; the slide 5 is mounted on the support assembly, the lithium battery carrier plate 6 is mounted on the slide 5, and the clamping part is mounted on the lithium battery carrier plate 6; the power end of the movable arm is connected to a spot welding machine 21, which faces the lithium battery carrier plate 6; the spot welding path adjustment component includes a transmission part and an actuating element 23; the transmission part is connected to the slide 5, and the actuating element 23 is connected to the movable arm and cooperates with the transmission part; a lithium battery pack is placed on the lithium battery carrier plate 6. When the movable arm rises, it drives the actuating element 23 and the spot welding machine 21 to rise simultaneously. The rising of the actuating element 23 causes the transmission part to rotate, and the rotation of the transmission part causes the slide 5 to move, aligning the next electrode of the lithium battery with the spot welding machine 21.

[0041] In this embodiment, the lithium battery is clamped by a positioning component, so that the electrode side of the lithium battery corresponds to the spot welding machine 21. The movable arm adopts a single-axis movable arm, which does not require a complex control structure, and is simple and compact to meet the application of small space. The spot welding path adjustment component works with the movable arm and the positioning component to drive the positioning component and the spot welding machine 21 to move synchronously. The movable arm rises, which drives the toggle component 23 and the spot welding machine 21 to rise at the same time, so that the slide 5 drives the lithium battery carrier plate 6 to move. The moving distance of the lithium battery carrier plate 6 is equal to the distance between the lithium battery electrodes, so that the next electrode is aligned with the spot welding machine 21. The positioning calibration process and the welding parameter calibration process are omitted, which shortens the cycle of subsequent electrode welding and improves the stability of subsequent welding.

[0042] Optionally, a telescopic part is also included, which is installed corresponding to the lithium battery carrier plate 6 and is used to adjust the overall position of the battery. The telescopic part includes: a guide rail, a top plate 7, and a telescopic cylinder 8. The guide rail is connected to the top of the slide block 5, the top plate 7 is connected to one side of the lithium battery carrier plate 6, and the telescopic cylinder 8 is installed at one end of the slide block 5 and fixedly connected to the top. The top plate 7 is connected to the power end of the telescopic cylinder 8. The output power of the telescopic cylinder 8 drives the top plate 7 to move, thereby driving the lithium battery carrier plate 6 to move along the guide rail relative to the slide block 5, so as to realize the adjustment of the position of the battery electrodes on the lithium battery carrier plate 6.

[0043] In this embodiment, the lithium battery pack is placed on the lithium battery carrier plate 6. The telescopic cylinder 8 drives the lithium battery carrier plate 6 to move, which can adjust the relative position of the battery pack's electrodes and the spot welding machine 21. After all the electrodes on one side of the lithium battery pack are welded, the telescopic cylinder 8 is driven to move the lithium battery pack horizontally so that the electrodes on the other side correspond to the spot welding machine 21, thus meeting the double-sided cyclic welding requirements of the lithium battery pack.

[0044] Optionally, the clamping part includes: a motor 10, a gear 11, a rack assembly, and a clamping plate 13; the motor 10 is mounted on the lithium battery carrier plate 6, the gear 11 is connected to the power end of the motor 10, the rack assembly is mounted on the lithium battery carrier plate 6, and the clamping plate 13 is connected to the outside of the rack assembly and corresponds to the side of the battery without electrode plates; the rack assembly includes: a sliding frame 9 and a first rack 12 and a second rack 25;

[0045] The sliding frame 9 is mounted on the lithium battery carrier plate 6, and the first rack 12 and the second rack 25 are slidably connected to the two ends of the sliding frame 9, and are symmetrical along the diagonal of the sliding frame 9.

[0046] The first rack 12 and the second rack 25 mesh with the upper and lower sides of the gear 11 respectively, and slide in opposite directions on the sliding frame 9 under the drive of the motor 10; the ends of the first rack 12 and the second rack 25 away from the gear 11 are both connected to a clamping plate 13.

[0047] In this embodiment, the motor 10 drives the gear 11 to rotate. After the gear 11 rotates, it drives the first rack 12 and the second rack 25 to slide along the sliding frame 9. When the first rack 12 and the second rack 25 slide, they simultaneously drive the two clamping plates 13 to move closer or further away. When welding, the motor 10 drives the two clamping plates 13 to move closer to achieve clamping and limiting of the battery. After welding is completed, the motor 10 drives the two clamping plates 13 to move further away to facilitate battery unloading.

[0048] Optionally, the movable arm includes: a hydraulic cylinder 19, a horizontal plate 20, and a side plate 22; the hydraulic cylinder 19 serves as the driving component in this example and is located near the transmission unit; the horizontal plate 20 is connected to the top of the power rod of the hydraulic cylinder 19, and the side plate 22 is installed on the side of the horizontal plate 20 near the transmission unit; the side plate 22 can support the actuating member 23 and drive the actuating member 23 to rise with the output of the power rod, and the actuating member 23 applies force to the transmission unit after rising.

[0049] In this embodiment, the driving component is a hydraulic cylinder 19 mounted on the support assembly, which can drive the spot welding machine 21 to move linearly while simultaneously inputting power to the transmission unit; the horizontal plate 20 is connected to the power end and extends to the lithium battery carrier plate 6, enabling the spot welding machine 21 to face the lithium battery on the lithium battery carrier plate 6; the side plate 22 is installed close to the transmission unit, and can cooperate with the transmission unit to convert the linear force of the driving component into rotational force, and transmit it to the slide 5 through the transmission unit, so that the moving path of the slide 5 and the lifting path of the spot welding machine 21 are fully coordinated in time and space, shortening the calibration time before operation and improving the efficiency of cyclic operation.

[0050] Optional, such as Figure 3 The actuating element 23 shown is connected to the side plate 22 and is close to the spline wheel 17; the actuating element 23 is used to output power to the spline wheel 17 as the side plate 22 rises.

[0051] In this embodiment, the actuating component 23 is an L-shaped plate movably connected to the side plate 22, with the connection fulcrum located at a right angle. When the actuating component 23 rises, it actuates the spline 18 and drives the spline wheel 17 to rotate. When the actuating component 23 falls, it is pushed open by the spline 18 and rotates on its own, but does not drive the spline wheel 17 to rotate. It automatically resets after the actuating component 23 falls below the spline wheel 17. It can output power to the spline wheel 17 in a cycle as the side plate 22 rises repeatedly, so as to adjust the slide 5 to move continuously along the lead screw 3, so that all electrodes on one side of the lithium battery pack can be cyclically welded with the spot welding machine 21.

[0052] Optionally, the support assembly includes a base 1, a support plate 2, two guide rods 4, and a bracket 15. The support plate 2 includes a first support plate 2 and a second support plate 2, which are symmetrically installed at both ends of the base 1. The two guide rods 4 are inserted between the first support plate 2 and the second support plate 2. The bracket 15 is installed on the support plate 2 near the movable arm. The movable arm is installed on the base 1, and the two guide rods 4 are symmetrically installed at both ends of the slide block 5.

[0053] In this embodiment, the support assembly provides support for the positioning assembly, the spot welding path adjustment assembly, and the movable arm, enabling the three to form a connected whole without the need for additional auxiliary equipment. Furthermore, the first support plate 2, the second support plate 2, and the two guide rods 4 limit and support the positioning assembly, ensuring that the stroke of the slide 5 always corresponds to the spot welding machine 21 on the movable arm. The bracket 15 is U-shaped and surrounds the movable arm, with the power input end of the transmission unit located on the bracket 15, thereby enabling the transmission unit to cooperate with the actuating element 23, receiving the power transmitted by the actuating element 23 as the movable arm rises.

[0054] Optionally, the transmission unit includes: a lead screw 3, a rotating shaft, a splined wheel 17, a first bevel gear 14, and a second bevel gear 16; both ends of the lead screw 3 pass through two support plates 2 respectively and are screwed to the bottom of the slide block 5; the rotating shaft is mounted on the bracket 15 near the movable arm, the splined wheel 17 is connected to the rotating shaft and corresponds to the actuating element 23, the first bevel gear 14 is mounted on the end of the lead screw 3 passing through the support plate 2, and the second bevel gear 16 is mounted on the rotating shaft and meshes with the first bevel gear; in this embodiment, the lead screw 3 is fixedly connected to the first bevel gear 14, and the first bevel gear 14 meshes with the second bevel gear 16 on the bracket 15; the lead screw 3 is also screwed to the slide block 5. The second bevel gear 16 is connected to the splined wheel 17 via a rotating shaft; thus, the splined wheel 17 rotates under force when the actuating member 23 rises. The power is transmitted through the splined wheel 17 to drive the rotating shaft and the second bevel gear 16 to rotate. The second bevel gear 16 transmits power to the first bevel gear 14. After the second bevel gear 16 rotates, it drives the first bevel gear 14 to rotate. When the first bevel gear 14 rotates, it drives the lead screw 3 to rotate, thereby causing the slide 5 to move along the lead screw 3 and the guide rod 4. The movement accuracy can be designed according to the electrode spacing. By replacing different models of splined wheel 17, bevel gear 11 and lead screw 3, the overall device has high flexibility in assembly and disassembly and a simplified structure.

[0055] Optionally, two guide rods 4 are symmetrically mounted on the support plate 2 and pass through the slide block 5 to support and limit the slide block 5. In this embodiment, both guide rods 4 pass through the slide block 5 and are fixed between the support plates 2, forming a double-rail support for the slide block 5 to ensure stability during sliding. At the same time, both guide rods 4 are set on the same side and parallel to the lead screw 3, which can limit the slide block 5.

[0056] Optionally, a reset mechanism is provided on one side of the lead screw 3 for adjusting the reset of the lithium battery carrier plate 6 on the lead screw 3. In this embodiment, the reset mechanism is a handwheel 24, which is installed at the end of the lead screw 3 away from the movable arm. After all the electrodes on one side of the lithium battery pack have been welded, the handwheel 24 is rotated to make the lead screw 3 rotate in the opposite direction, thereby driving the slide block 5 to move in the opposite direction until the battery carrier plate returns to the initial position. At the same time, driven by the telescopic part, the starting point of the electrode on the other side of the lithium battery pack is aligned with the spot welding machine 21. Then the spot welding steps are repeated to complete the welding of all the electrodes of the lithium battery pack.

[0057] Working principle:

[0058] The welded lithium battery pack is placed on the lithium battery carrier plate 6, with the side of the lithium battery pack pressed against the top plate 7. Nickel sheets are placed on the electrodes of the lithium battery pack. Then, the motor 10 is started, and the motor 10 drives the gear 11 to rotate. After the gear 11 rotates, it drives the first rack 12 and the second rack 25 to slide along the sliding frame 9. When the first rack 12 and the second rack 25 slide, they simultaneously drive the two clamping plates 13 to move closer until the lithium battery pack is clamped.

[0059] The telescopic cylinder 8 is activated, and the output power of the telescopic cylinder 8 drives the top plate 7 to move, which in turn moves the lithium battery carrier plate 6 along the guide rail relative to the slide block 5 until the electrode on one side of the battery pack corresponds to the spot welding machine 21. Then, the hydraulic cylinder 19 is activated, and the power rod of the hydraulic cylinder 19 moves downward, which drives the horizontal plate 20 and the spot welding machine 21 to descend until the spot welding machine 21 contacts the nickel sheet of the starting electrode. The spot welding machine 21 is started according to the set welding parameters, thereby welding the nickel sheet onto the starting electrode.

[0060] After the initial electrode welding is completed, hydraulic cylinder 19 is filled with oil, and the power rod moves upward, driving the horizontal plate 20, spot welding machine 21, and side plate 22 to move upward. When the side plate 22 moves upward, the actuating element 23 rises with it. The actuating element 23 is an L-shaped plate hinged to the side plate 22. It only actuates the spline 18 when rising, thereby driving the spline wheel 17 to rotate. The power is transmitted through the spline wheel 17 to drive the rotating shaft and the second bevel gear 16 to rotate. The second bevel gear 16 transmits power to the first bevel gear 14. After the second bevel gear 16 rotates, it drives the first bevel gear 14 to rotate. When the first bevel gear 14 rotates, it drives the lead screw 3 to rotate, thereby causing the slide 5 to move along the lead screw 3 and the guide rod 4. The power output of the spline wheel 17 at one time can only drive the slide 5 to move a small distance, which is equal to the electrode spacing, so that the next electrode is aligned with the spot welding machine 21. Then the power rod of the hydraulic cylinder drives the spot welding machine 21 to move downward again to continue the welding work. This cycle is repeated until the welding work of all electrodes on one side of the lithium battery pack is completed.

[0061] Reactivate telescopic cylinder 8. The output power of telescopic cylinder 8 drives the top plate 7 to move, causing the lithium battery carrier plate 6 to move along the guide rail relative to the slide block 5 until the electrode on the other side of the battery pack corresponds to the spot welding machine 21. Also, rotate handwheel 24 to make lead screw 3 rotate in the opposite direction, causing slide block 5 to move away from the movable arm until it reaches the initial position. At the same time, the first electrode on the other side corresponds to the spot welding machine 21 in the initial position and a nickel sheet is placed.

[0062] Then, the hydraulic cylinder 19 is activated, and the power rod of the hydraulic cylinder 19 moves downward. Then, the spot welding steps are repeated to complete the welding of all electrodes of the lithium battery pack. Example

[0063] This embodiment provides a welding mechanism for lithium battery assembly, including a positioning component, a movable arm, and a spot welding path adjustment component. The technical concept is the same as that of Embodiment 1. Other components can be used to improve the handwheel, such as adding a third bevel gear at the end of the lead screw away from the first bevel gear, and providing a reset motor and a gear transmission combination meshing with the third bevel gear at the end of the third bevel gear. When the reset motor is started, the power is transmitted to the third bevel gear through the gear, thereby driving the lead screw to rotate in the opposite direction.

[0064] Alternatively, other power components can be used as the drive mechanism for the boom.

[0065] Optionally, the telescopic part can be a linear module combination of a servo motor and a lead screw, which has higher motion accuracy compared to a telescopic cylinder.

[0066] Optionally, to reduce vibration during sliding, the number of guide rods is not limited to two. Alternatively, a slide rail mounted on the base can be used instead of guide rods for better stability.

[0067] In summary, this invention eliminates the need for complex CNC mechanisms. By integrating the execution paths of the positioning component and the movable arm through a spot welding path adjustment assembly, the positioning component and the spot welding machine can work collaboratively. The rising of the movable arm causes the toggle component and the spot welding machine to rise simultaneously, causing the slide to move the lithium battery carrier plate. The movement distance of the lithium battery carrier plate is equal to the electrode spacing of the lithium battery, ensuring that the next electrode automatically aligns with the spot welding machine after moving with the lithium battery carrier plate. This eliminates the need for positioning and calibration processes and welding parameter calibration processes, shortening the welding cycle of subsequent electrode pieces and improving the stability of subsequent welding. The gear and rack design of the clamping part secures both sides of the lithium battery, improving stability during subsequent welding and thus enhancing welding quality. The telescopic part moves the lithium battery carrier plate along the guide rail relative to the slide, allowing for position adjustment of the electrodes on both sides of the battery, ensuring they align with the spot welding machine and meeting the double-sided cyclic welding requirements of lithium battery packs. The actuating component is movably connected to the power end of the movable arm. The movable arm adopts a single-axis movable arm, which does not require a complex control structure. The structure is simple and compact, which can meet the application in small spaces. When the actuating component rises, it will actuate the spline and drive the spline wheel to rotate. When the actuating component descends, it will be pushed open by the spline and rotate on its own, but will not drive the spline wheel to rotate. It will automatically reset after the actuating component descends below the spline wheel. It can output power to the spline wheel in the repeated rising and falling cycle of the side plate to adjust the slide to move continuously along the lead screw, so that all electrodes on the side of the lithium battery pack can be cyclically welded with the spot welding machine.

[0068] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0069] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A welding mechanism for assembling lithium batteries, characterized in that, include: The positioning assembly includes a slide, a lithium battery carrier plate mounted on the slide, and a clamping part disposed on the lithium battery carrier plate; A movable arm, the power end of which is connected to a spot welder facing the lithium battery carrier plate; A spot welding path adjustment assembly includes a transmission part connected to a slide and a toggle element disposed on a movable arm and cooperating with the transmission part; A lithium battery pack is placed on the lithium battery carrier plate. When the movable arm rises, it drives the actuating component and the spot welding machine to rise simultaneously. The rise of the actuating component drives the transmission unit to rotate. When the transmission unit rotates, it drives the slide to move, so that the next electrode of the lithium battery is aligned with the spot welding machine.

2. The welding mechanism for lithium battery assembly according to claim 1, characterized in that, It also includes a telescopic part, which includes a guide rail mounted on the slide, a top plate connected to one side of the lithium battery carrier plate, and a telescopic cylinder mounted on the slide. The top plate is connected to the power end of the telescopic cylinder and is used to drive the lithium battery carrier plate to move relative to the slide along the guide rail.

3. The welding mechanism for lithium battery assembly according to claim 1, characterized in that, The clamping part includes a motor mounted on the lithium battery carrier plate, a gear connected to the power end of the motor, a rack assembly disposed on the lithium battery carrier plate, and a clamping plate connected to the outside of the rack assembly. The rack and pinion assembly includes a sliding frame mounted on a lithium battery carrier plate, and a first rack and a second rack respectively connected to both ends of the sliding frame; The first rack and the second rack mesh with the gear respectively, and move in opposite directions on the sliding frame under the drive of the motor; the ends of the first rack and the second rack away from the gear are both connected to the clamping plate.

4. The welding mechanism for lithium battery assembly according to claim 1, characterized in that, The movable arm includes a drive component, a horizontal plate disposed at the power end of the drive component, and a side plate mounted on the side of the horizontal plate near the transmission part. The side plates are used to support the actuating components; the power of the drive components drives the horizontal plate and side plates to move up and down.

5. The welding mechanism for lithium battery assembly according to claim 4, characterized in that, The actuating element is connected to the side plate and is close to the transmission part; The actuating component is movably mounted on the side plate via a connecting shaft, and a limiting block is provided on the downward-facing side of the actuating component to limit the rotation angle and direction of the actuating component.

6. The welding mechanism for lithium battery assembly according to claim 1, characterized in that, The positioning component, spot welding path adjustment component, and movable arm are all mounted on the support component. The support component includes a base, a support plate mounted on the base, multiple guide rods inserted between the support plates, and a bracket mounted on the support plate and close to the movable arm.

7. The welding mechanism for lithium battery assembly according to claim 6, characterized in that, The transmission unit includes a lead screw inserted into the support plate and connected to the slide, a rotating shaft mounted on the bracket, a splined wheel connected to the rotating shaft and corresponding to the actuating element, a first bevel gear disposed at the end of the lead screw, and a second bevel gear fitted on the rotating shaft and meshing with the first bevel gear.

8. The welding mechanism for lithium battery assembly according to claim 6, characterized in that, The multiple guide rods are symmetrically arranged on the slide block to support and limit its movement.

9. The welding mechanism for lithium battery assembly according to claim 6, characterized in that, A reset mechanism is provided on one side of the lead screw for adjusting the reset of the lithium battery carrier plate on the lead screw.

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