Battery top cover pole composite swing continuous laser welding device

Abstract

The application discloses a battery top cover pole composite swing continuous laser welding device and belongs to the laser technical field. Mainly including the welding tool with the platform, the welding tool further includes the righting mechanism arranged at both ends of the platform, the righting mechanism includes the stand arranged at one end, the top end of the stand is hinged with the crossbeam, the crossbeam is provided with the follow-up mechanism, the follow-up mechanism includes the mounting ring arranged on the crossbeam, the bottom end of the mounting ring is provided with the sliding groove, the sliding groove is provided with the sliding block, the bottom end of the mounting ring is rotationally provided with the rotating ring, the rotating ring is provided with the penetrating arc groove, one side of the mounting ring is provided with the driving assembly, the bottom end of the sliding block is provided with the pressing part, and the rotating ring is provided with the welding head located at one end of the arc groove. The battery top cover pole composite swing continuous laser welding device rightens and centers the pole through the righting mechanism, and the follow-up pressing part is delayed to follow up through the arc groove and the sliding groove, so that the battery top cover heat affected zone is elastically pressed all the way, and the effect of inhibiting the laser welding warping deformation of the battery top cover pole is achieved.

Description

Technical Field

[0001] This invention relates to the field of welding technology, specifically to a composite oscillating continuous laser welding device for battery top cover poles. Background Technology

[0002] Composite oscillating laser welding technology is an advanced welding method that has developed in the field of laser welding in recent years. This technology introduces a beam oscillation function to the traditional laser welding process, allowing the laser beam to oscillate and scan along a preset trajectory (such as a circle, figure-eight, or straight line) at high frequency during the welding process, thereby expanding the molten pool opening, stabilizing the temperature field, and promoting gas expulsion.

[0003] In the manufacturing process of power batteries, the welding of the battery top cover terminals is one of the key processes that determines the battery's sealing performance, conductivity, and safety. The terminals are usually made of copper or aluminum, which are highly reflective materials with low laser absorption rates, making welding difficult. Currently, composite oscillating laser welding technology has been widely used in the welding of battery top cover terminals. Compared with traditional single-fiber laser welding, it has significant advantages in suppressing spatter, reducing porosity, and improving weld formation quality.

[0004] During the laser welding process of the top cover pole, the pole welding is usually a circumferential weld. The laser performs circumferential scanning welding along the connection between the pole and the through hole of the cover plate. During the welding process, the local high temperature causes the area around the through hole of the cover plate to expand due to heat, while the base material with a lower surrounding temperature restricts this expansion, generating compressive stress.

[0005] When the weld cools, the molten pool contracts and generates tensile stress. This uneven thermal expansion and contraction effect eventually causes the edge of the cover plate through hole to warp and deform, which seriously affects the weld quality and product yield. Summary of the Invention

[0006] Based on the above-mentioned problems in the existing technology, the problem to be solved by the present invention is to provide a battery top cover electrode composite oscillating continuous laser welding device, which solves the problem of warping and deformation around the battery top cover through hole caused by local heating during the composite oscillating continuous laser welding process.

[0007] The technical solution adopted by this invention to solve its technical problem is: a battery top cover electrode composite oscillating continuous laser welding device, comprising:

[0008] A welding fixture with a platform, the welding fixture further comprising:

[0009] A straightening mechanism is provided at both ends of the platform, and the straightening mechanism includes:

[0010] A column is installed at one end of the platform, and a crossbeam is hinged to the top of the column.

[0011] A follower mechanism, which is mounted on the crossbeam, includes:

[0012] The mounting ring is mounted on the crossbeam, and a groove is provided at the bottom end of the mounting ring, with a slider inside the groove;

[0013] A rotating ring is rotatably mounted at the bottom end of the mounting ring, and an arc groove is formed on the rotating ring, the arc groove penetrating the rotating ring.

[0014] A drive assembly disposed on one side of the mounting ring;

[0015] A clamping part is disposed at the bottom end of the slider;

[0016] A welding head is disposed on the rotating ring at one end of the arc groove.

[0017] Furthermore, the welding fixture also includes limiting blocks disposed on both sides of the platform, the limiting blocks being used to initially limit the cover plate;

[0018] A support block is provided at one end of the platform, and a cylinder is provided at the other end of the platform. A support pad is fixedly provided at the output end of the cylinder, and the support pad is arranged opposite to the support block.

[0019] Pneumatic clamps are also provided on both sides of the platform, which are used to fix the edges of the cover plate.

[0020] Furthermore, the straightening mechanism also includes a platform fixedly installed at the other end of the platform, the top of which matches the other end of the crossbeam;

[0021] A fastener is provided between the platform and the crossbeam, and the fastener is used to lock the crossbeam after it is erected on the top of the platform.

[0022] Furthermore, an electric cylinder is fixedly installed at the upper end of the crossbeam. The output end of the electric cylinder passes through the crossbeam and is fixedly installed with a clamping seat. A spring sleeve is installed at the bottom end of the clamping seat, with the larger end of the spring sleeve facing downwards.

[0023] Furthermore, the drive assembly includes a gear ring fixedly disposed on the outside of the rotating ring, an extension plate fixedly disposed on one side of the top of the sleeve seat, and a motor fixedly disposed on the extension plate. The output end of the motor is fixedly provided with a gear, which meshes with the gear ring.

[0024] Furthermore, the slider extends through the arc groove to the other side of the rotating ring, and the slider simultaneously slides in cooperation with both the groove and the arc groove;

[0025] A retaining rod is fixedly provided at the bottom end of the slider, and the pressing part is provided at the output end of the retaining rod.

[0026] Furthermore, the pressing part includes a mounting plate fixedly disposed at the bottom end of the supporting rod. The bottom end of the mounting plate is provided with a sliding sleeve and a sliding rod is slidably disposed inside the sliding sleeve. A spring is fixedly disposed between the sliding rod and the inside of the sliding sleeve. One end of the spring is fixedly connected to the inside of the sliding sleeve, and the other end of the spring is fixedly connected to one end of the sliding rod.

[0027] The other end of the sliding rod is fixedly provided with a mounting base, and a pressure roller is rotatably provided on the mounting base.

[0028] Furthermore, the arc groove has a first end and a second end, the first end being the end away from the welding head, and the second end being the end close to the welding head;

[0029] In the initial state, the slider is located at the first end of the arc groove.

[0030] Furthermore, a three-axis slide is provided between the welding head and the rotating ring. The three-axis slide is used to adjust the position of the welding head relative to the rotating ring. The welding head is a composite oscillating laser head.

[0031] Furthermore, there is a gap between the clamping part and the weld.

[0032] The beneficial effects of the present invention are as follows: The battery top cover electrode post composite swing continuous laser welding device provided by the present invention, through the straightening mechanism to straighten the center electrode post and the follow-up pressing part to delay the follow-up through the arc groove and the sliding groove, so that the heat-affected zone of the cover plate is elastically pressed throughout the process, thereby achieving the effect of suppressing the warping deformation of the battery top cover electrode post during laser welding.

[0033] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0034] Figure 1 This is an overall schematic diagram of a battery top cover electrode composite oscillating continuous laser welding device according to the present invention;

[0035] Figure 2 This is a schematic diagram of another state of the overall battery top cover electrode composite oscillating continuous laser welding device of the present invention;

[0036] Figure 3 for Figure 2 A magnified view of part A in the diagram;

[0037] Figure 4 for Figure 1 A schematic diagram of the Zhongfuzheng organization;

[0038] Figure 5 for Figure 1 A schematic diagram of the exploded cross-section of the central straightening mechanism;

[0039] Figure 6 for Figure 1 A schematic diagram of the servo mechanism;

[0040] Figure 7 for Figure 6 A magnified view of part B in the diagram;

[0041] The following are the labeling elements in the figure:

[0042] 1. Base; 2. Welding fixture; 22. Platform; 23. Limiting block; 24. Pneumatic clamp; 25. Cylinder; 26. Supporting block.

[0043] 3. Straightening mechanism; 30. Column; 300. Platform; 31. Crossbeam; 32. Hook and loop; 33. Electric cylinder; 34. Jacket seat; 35. Spring sleeve; 40. Mounting ring; 41. Rotating ring; 42. Drive assembly; 420. Motor; 422. Gear ring; 423. Gear; 424. Extension plate; 43. Welding head.

[0044] 4. Follower mechanism; 45. Support rod; 46. Pressing part; 460. Sliding sleeve; 461. Sliding rod; 462. Spring; 463. Mounting base; 464. Pressure roller; 465. Mounting plate; 47. Slide groove; 48. Arc groove; 49. Slider. Detailed Implementation

[0045] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0046] Example 1:

[0047] This embodiment specifically illustrates the basic structure and working principle of a battery top cover electrode composite oscillating continuous laser welding device, specifically:

[0048] like Figures 1-2 As shown, the present invention provides a battery top cover and terminal post composite oscillating continuous laser welding device, including a base 1 and a welding fixture 2 disposed on the base 1. The welding fixture 2 is used to perform laser welding operations on the battery top cover and terminal post. The welding fixture 2 includes a platform 22 fixedly disposed on the upper end of the base 1. The platform 22 is used to place the battery top cover to be welded.

[0049] The upper surface of the platform 22 is flat to ensure the flatness of the battery top cover after it is placed. At the same time, limit blocks 23 are set on both sides of the platform 22. The limit blocks 23 are used to initially limit the battery top cover to prevent the battery top cover from shifting significantly on the platform 22.

[0050] Meanwhile, a support block 26 is fixedly provided at one end of the platform 22. The support block 26 serves as the positioning reference for the battery top cover and is used to support and position one end of the battery top cover.

[0051] Furthermore, a cylinder 25 is fixedly installed at the other end of the platform 22. The output end of the cylinder 25 is positioned towards the abutment block 26, and an abutment pad (not shown in the figure) is fixedly installed at the output end of the cylinder 25. Thus, when the battery top cover is placed on the platform 22 along the limiting block 23, the cylinder 25 is activated, and the cylinder 25 pushes the abutment pad to move towards the abutment block 26. The abutment pad pushes the battery top cover to move until one end of the battery top cover abuts against the abutment block 26, thereby achieving the initial positioning and clamping of the battery top cover in the horizontal direction.

[0052] In order to securely fix the battery top cover to the platform 22 during the welding process, such as Figure 1 As shown, multiple sets of pneumatic clamps 24 are provided on both sides of the platform 22. The pneumatic clamps 24 are used to clamp and fix the edge of the battery top cover to facilitate subsequent welding operations.

[0053] When the welding operation begins, the battery top cover is first placed on the surface of the platform 22, with the two sides of the battery top cover located between the limiting blocks 23. The cylinder 25 is activated to push the battery top cover toward the abutment block 26, so that one end of the battery top cover abuts against the abutment block 26, completing the initial positioning.

[0054] Then insert the terminal into the pre-drilled hole in the battery top cover, with the lower end of the terminal protruding from the hole in the battery top cover;

[0055] Finally, multiple sets of pneumatic clamps 24 are activated. The pneumatic clamps 24 press the edge of the battery top cover and fix the battery top cover on the platform 22, thus completing the preparation work before welding.

[0056] When the terminal is inserted into the hole of the battery top cover, the terminal may tilt or be eccentric due to the fit gap between the terminal and the hole. If welding is carried out directly in this state, the tilt of the terminal will cause the clamping force to be unevenly distributed around the through hole during subsequent pressing, forming an off-center load, which will aggravate the warping of the battery top cover during the welding process.

[0057] To solve the above problems, such as Figures 1-4 As shown, the present invention provides a straightening mechanism 3 on the platform 22, which is used to straighten and center the pole before pressing it to ensure that the pole is in a vertical state.

[0058] Specifically, the straightening mechanism 3 includes a column 30 fixedly installed at one end of the platform 22. The column 30 extends upward in the vertical direction, and a crossbeam 31 is hinged to the top of the column 30, so that the crossbeam 31 can rotate about the hinge point in the vertical plane relative to the column 30.

[0059] Meanwhile, a platform 300 is fixedly installed at the other end of the platform 22. The top of the platform 300 matches the end of the crossbeam 31 away from the column 30. That is, the height of the top of the platform 300 is the same as the height of the lower surface of the crossbeam 31 when the crossbeam 31 is rotated to a horizontal state, so that the end of the crossbeam 31 away from the column 30 can be erected on the top of the platform 300.

[0060] Furthermore, a latch 32 is provided between the platform 300 and the crossbeam 31. The latch 32 is used to lock the crossbeam 31 to the platform 300 after the crossbeam 31 is erected on the top of the platform 300, so that the crossbeam 31 can remain stable in the working state.

[0061] It should be noted that in the initial state (i.e., the non-working state, such as...) Figure 2 As shown), the crossbeam 31 is in a vertical state. At this time, the crossbeam 31 does not occupy the space above the platform 22, which facilitates the removal and placement of the battery top cover and the terminal post.

[0062] When straightening is required, the operator pushes the end of the crossbeam 31 away from the column 30 and rotates it downwards around the hinge point until the crossbeam 31 is rotated to a horizontal state. At this time, the end of the crossbeam 31 away from the column 30 is placed on the top of the platform 300. Then, the crossbeam 31 is locked and fixed to the platform 300 by the buckle 32, and the crossbeam 31 is kept in a horizontal working state.

[0063] Meanwhile, an electric cylinder 33 is fixedly installed on the crossbeam 31. The output end of the electric cylinder 33 passes through the crossbeam 31 and is fixedly connected to the clamping seat 34. At the same time, a spring sleeve 35 is fixedly installed at the bottom end of the clamping seat 34. When the crossbeam 31 rotates to a horizontal state, the spring sleeve 35 is located directly above the hole reserved in the top cover of the clamped battery.

[0064] It should be noted that the spring sleeve 35 is an elastic clamp structure with a conical interior, having a large end and a small end. The side wall of the spring sleeve 35 has multiple slots along the axial direction, which allows the spring sleeve 35 to contract radially and generate elastic deformation when subjected to axial pressure. The large end of the spring sleeve 35 faces downward (i.e. towards the battery top cover), and the small end faces upward and is fixedly connected to the clamp seat 34 to facilitate subsequent straightening operations.

[0065] Thus, when the crossbeam 31 is rotated to a horizontal position and erected on the top of the platform 300, the spring sleeve 35 is located directly above the hole reserved in the battery top cover, and the axis of the spring sleeve 35 is basically coincident with the preset axis of the pole post.

[0066] At this time, the electric cylinder 33 is activated, which drives the jacket seat 34 and the spring sleeve 35 to move downward. The large end of the spring sleeve 35 first contacts the top of the pole post. Since the spring sleeve 35 is conical, the inner diameter of its large end is larger than the outer diameter of the pole post. As the spring sleeve 35 continues to move downward, the top of the pole post enters the interior of the spring sleeve 35. The inner wall of the conical surface of the spring sleeve 35 contacts the outer wall of the top of the pole post. Under the guidance of the conical surface, the pole post is automatically pushed to the center position of the spring sleeve 35, thereby realizing the alignment and centering of the pole post.

[0067] As the electric cylinder 33 continues to move downward, the contact force between the spring sleeve 35 and the terminal increases, and the side wall of the spring sleeve 35 undergoes elastic deformation, applying radial clamping force and axial pressing force to the terminal, pressing the terminal into the hole in the battery top cover, eliminating the gap between the terminal and the hole, achieving the effect of straightening and centering the terminal and initially pressing it, thereby avoiding the problem of uneven load on the pressure head caused by the tilt of the terminal, so as to prevent local warping caused by uneven load.

[0068] A mounting ring 40 is fixedly provided on the upper end of the sleeve base 34, and a rotating ring 41 is rotatably provided on the bottom end of the mounting ring 40. A drive assembly 42 is provided on one side of the sleeve base 34. The drive assembly 42 includes a toothed ring 422 fixedly provided on the outside of the rotating ring 41. An extension plate 424 is fixedly provided on one side of the top end of the sleeve base 34. The extension plate 424 extends to one end of the toothed ring 422. A motor 420 is fixedly provided on the extension plate 424. A gear 423 is fixedly provided on the output end of the motor 420. The gear 423 meshes with the toothed ring 422.

[0069] Thus, starting the motor 420 will drive the gear ring 422 through the gear 423 to drive the rotating ring 41 to rotate at the bottom end of the mounting ring 40;

[0070] Meanwhile, a welding head 43 is installed at the bottom of the rotating ring 41. The welding head 43 is a composite oscillating laser head, which means that the welding head 43 can output two laser beams with different energy densities. By oscillating welding with two laser beams, the spatter and porosity defects in the welding process are effectively reduced, so as to facilitate subsequent composite oscillating laser welding operations.

[0071] It should be noted that a three-axis slide is provided between the welding head 43 and the rotating ring 41 to adjust the position of the welding head 43, so that the welding head 43 can move closer to or further away from the welding point according to the actual welding needs, so as to adapt to the welding requirements of different specifications of poles.

[0072] When the welding operation begins, the electric cylinder 33 first drives the jacket seat 34 and the mounting ring 40 to move downward as a whole, so that the spring sleeve 35 contacts and straightens the pole post, while the pressing part 46 is pressed against the surface of the top cover under the elastic action of the spring 462.

[0073] Then the motor 420 is started, and the gear 423 drives the gear ring 422 to rotate the rotating ring 41. The welding head 43 rotates accordingly and performs compound oscillating laser welding on the connection between the pole post and the top cover.

[0074] Example 2:

[0075] However, during subsequent laser welding, the welding heat input can still cause thermal deformation of the cover plate around the through-hole. Therefore, as... Figures 1-6 As shown, the present invention has a follower mechanism 4 at the bottom of the rotating ring 41, which is used to continuously follow up and press the area of ​​the battery top cover around the pole during the welding process to suppress the warping deformation of the battery top cover.

[0076] Specifically, the follower mechanism 4 includes a support rod 45 installed at the bottom of the rotating ring 41, and a pressing part 46 is provided at the bottom of the support rod 45. The pressing part 46 is used to continuously apply a pressing force to the welding heat-affected zone of the battery top cover throughout the welding process, thereby effectively suppressing the warping deformation of the battery top cover caused by local heating.

[0077] Specifically, the clamping part 46 includes a mounting plate 465 fixedly installed at the output end of the abutment rod 45, a sliding sleeve 460 fixedly installed at the bottom end of the mounting plate 465, a sliding rod 461 slidably installed inside the sliding sleeve 460, and a spring 462 fixedly installed between the sliding rod 461 and the inside of the sliding sleeve 460. One end of the spring 462 is fixedly connected to the inside of the sliding sleeve 460, and the other end is fixedly connected to one end of the sliding rod 461 to facilitate subsequent elastic compression operations.

[0078] Meanwhile, a mounting base 463 is fixedly provided at the other end of the sliding rod 461. A pressure roller 464 is rotatably provided on the mounting base 463. The pressure roller 464 contacts the surface of the top cover, thereby realizing the elastic pressing operation of the battery top cover.

[0079] Thus, when the rotating ring 41 rotates, the abutment rod 45 rotates accordingly, causing the mounting plate 465 and the sliding sleeve 460 to move along the surface of the battery top cover. The pressure roller 464 rolls on the surface of the battery top cover, and at the same time, the elastic force of the spring 462 continuously applies a pressing force to the battery top cover, achieving a follow-up effect of welding and pressing simultaneously.

[0080] It should be noted that there is a preset gap between the pressing part 46 and the welding point. That is, when the pressing roller 464 presses against the surface of the battery top cover, the pressing roller 464 maintains a certain distance from the welding edge of the pole post. This distance ensures that the pressing roller 464 will not hinder the welding operation of the laser welding head 43. At the same time, the pressing roller 464 can apply a pressing force to the surface of the top cover around the welding heat-affected zone, thereby effectively suppressing the warping deformation of the top cover during the welding process.

[0081] Example 3:

[0082] In the above welding process, if the clamping part 46 moves immediately at the beginning of the welding process, it may interfere with the positioning welding accuracy.

[0083] To solve the above problems, a sliding groove 47 is provided at the bottom end of the mounting ring 40. The sliding groove 47 is circumferentially opened around the bottom end of the mounting ring 40, and a slider 49 is slidably arranged inside the sliding groove 47. An arc groove 48 is provided on the rotating ring 41, and the arc groove 48 is provided through the rotating ring 41.

[0084] It should be noted that the slider 49 extends through the arc groove 48 to the other side of the rotating ring 41. That is, the slider 49 simultaneously cooperates with the slide groove 47 and the arc groove 48. The slider 49 can slide along the slide groove 47 and change its relative position under the constraint of the arc groove 48 as it follows the rotation of the rotating ring 41.

[0085] Furthermore, the abutment rod 45 is fixedly installed at the bottom end of the slider 49, so that the pressing part 46 is connected to the slider 49 through the abutment rod 45, so that the pressing part 46 can perform follow-up operation in the future.

[0086] It should be noted that the arc groove 48 has a first end and a second end. Specifically, the first end is the end away from the welding head 43, and the second end is the end close to the welding head 43.

[0087] In this embodiment, the central angle corresponding to the arc groove 48 is 30 degrees, that is, the angle spanned by the arc groove 48 from the first end to the second end is 30 degrees;

[0088] Thus, in the initial state, both the clamping part 46 and the slider 49 are located at the first end of the arc groove 48. At this time, the clamping part 46 is located at the welding start position, while the welding head 43 is located on the side where the second end of the arc groove 48 is located. That is, the welding head 43 and the clamping part 46 are separated by an angle of about 30 degrees in the circumferential direction.

[0089] When the welding operation begins, the electric cylinder 33 first drives the jacket seat 34 and the mounting ring 40 to move downward as a whole, so that the spring sleeve 35 contacts and straightens the pole post. At the same time, the pressure roller 464 of the pressing part 46 presses against the surface of the battery top cover under the elastic action of the spring 462.

[0090] At this time, the slider 49 is located at the first end of the arc groove 48, and the clamping part 46 is located at the welding start position;

[0091] Subsequently, the motor 420 is started, and the gear 423 drives the gear ring 422 to drive the rotating ring 41 to start rotating at the bottom end of the mounting ring 40.

[0092] When the rotating ring 41 rotates, the welding head 43 fixedly set on the rotating ring 41 rotates accordingly, and begins to perform compound oscillating laser welding on the connection between the electrode post and the battery top cover.

[0093] Meanwhile, since the slider 49 passes through the arc groove 48 and is set in the groove 47, in the initial stage of the rotation of the rotating ring 41, that is, during the first 30 degrees of the rotation of the welding head 43 from the starting position along the welding trajectory, since the slider 49 is located at the first end of the arc groove 48 and the groove wall of the arc groove 48 has not yet come into contact with the slider 49, the slider 49 remains stationary, the clamping part 46 also remains stationary, and the welding head 43 independently performs the preliminary welding operation to complete the positioning welding of the starting section of the welding trajectory (i.e., the first 30 degrees).

[0094] When the welding head 43 rotates more than 30 degrees, the groove wall at the second end of the arc groove 48 begins to contact and push the slider 49, causing the slider 49 to slide along the groove 47. At this time, the pressing part 46, driven by the slider 49, begins to move synchronously along the top cover surface following the direction of movement of the welding head 43. The pressure roller 464 rolls on the top cover surface, and at the same time, the elastic force of the spring 462 continuously applies a pressing force to the top cover, achieving the follow-up effect of welding and pressing simultaneously.

[0095] In other words, after the welding head 43 completes the initial welding of the first 30 degrees, the clamping part 46 begins to move synchronously with the welding head 43 to clamp the subsequent weld. The welding head 43 continues to move along the circular welding trajectory, and the clamping part 46 continues to follow and clamp until the welding head 43 completes a full circle of welding work.

[0096] After welding is completed, premature release of clamping part 46 causes residual stress generated by weld cooling and shrinkage, which induces warping. To solve this problem, after welding is completed, motor 420 reverses and drives rotating ring 41 to rotate in the opposite direction, and welding head 43 and clamping part 46 move in the opposite direction along the welding trajectory.

[0097] During the reversal process, the clamping part 46 clamps the weld area in the opposite direction to eliminate residual stress generated during welding and prevent the top cover from warping due to stress release.

[0098] When the rotating ring 41 reverses to the slider 49 and reaches the first end of the arc groove 48 again, the clamping part 46 returns to the welding start position (i.e., the initial 30-degree position). At this time, the clamping part 46 still maintains the clamping state on the top cover, and maintains pressure and slows down the weld area that has been welded, further releasing residual stress. Thus, during the reverse reset process, the clamping part 46 continues to press the cover plate, which can effectively prevent the weld from generating new deformation due to shrinkage during the cooling process, and ensure the flatness and sealing of the weld.

[0099] Finally, the electric cylinder 33 drives the jacket seat 34 to rise, the spring sleeve 35 disengages from the pole post, and the clamping part 46 disengages from the top cover surface, completing a complete welding cycle to facilitate the next welding operation.

[0100] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A battery top cover electrode composite oscillating continuous laser welding device, comprising a welding fixture (2) having a platform (22), characterized in that, The welding fixture (2) also includes: A straightening mechanism (3) is provided at both ends of the platform (22), and the straightening mechanism (3) includes: A column (30) is provided at one end of the platform (22), and a crossbeam (31) is hinged to the top of the column (30). Follower mechanism (4), which is disposed on the crossbeam (31), the follower mechanism (4) includes: Mounting ring (40) is mounted on the crossbeam (31). The bottom end of the mounting ring (40) is provided with a groove (47) and a slider (49) is provided inside the groove (47). A rotating ring (41) is rotatably disposed at the bottom end of the mounting ring (40). An arc groove (48) is provided on the rotating ring (41), and the arc groove (48) passes through the rotating ring (41). A drive assembly (42) is disposed on one side of the mounting ring (40); A clamping part (46) is provided at the bottom end of the slider (49); A welding head (43) is disposed on the rotating ring (41) at one end of the arc groove (48); The straightening mechanism (3) also includes a platform (300) fixedly installed at the other end of the platform (22), the top of the platform (300) matching the other end of the crossbeam (31); A latch (32) is provided between the platform (300) and the crossbeam (31), and the latch (32) is used to lock the crossbeam (31) after it is placed on the top of the platform (300); An electric cylinder (33) is fixedly installed at the upper end of the crossbeam (31). The output end of the electric cylinder (33) passes through the crossbeam (31) and is fixedly installed with a sleeve seat (34). A spring sleeve (35) is installed at the bottom end of the sleeve seat (34), with the large end of the spring sleeve (35) facing downward. The slider (49) extends through the arc groove (48) to the other side of the rotating ring (41), and the slider (49) simultaneously slides in cooperation with the slide groove (47) and the arc groove (48); The bottom end of the slider (49) is fixedly provided with a support rod (45), and the pressing part (46) is provided at the output end of the support rod (45); The arc groove (48) has a first end and a second end, the first end being the end away from the welding head (43) and the second end being the end close to the welding head (43); In the initial state, the slider (49) is located at the first end of the arc groove (48); A three-axis slide is provided between the welding head (43) and the rotating ring (41). The three-axis slide is used to adjust the position of the welding head (43) relative to the rotating ring (41). The welding head (43) is a composite oscillating laser head.

2. The battery top cover electrode composite oscillating continuous laser welding device according to claim 1, characterized in that: The welding fixture (2) also includes limiting blocks (23) disposed on both sides of the platform (22), the limiting blocks (23) being used to initially limit the cover plate; One end of the platform (22) is provided with a support block (26), and the other end of the platform (22) is provided with a cylinder (25). The output end of the cylinder (25) is fixedly provided with a support pad, and the support pad is arranged opposite to the support block (26). Pneumatic clamps (24) are also provided on both sides of the platform (22), which are used to fix the edge of the cover plate.

3. The battery top cover electrode composite oscillating continuous laser welding device according to claim 1, characterized in that: The drive assembly (42) includes a gear ring (422) fixedly disposed on the outside of the rotating ring (41), an extension plate (424) fixedly disposed on one side of the top of the sleeve seat (34), and a motor (420) fixedly disposed on the extension plate (424). A gear (423) is fixedly disposed at the output end of the motor (420), and the gear (423) meshes with the gear ring (422).

4. The battery top cover electrode composite oscillating continuous laser welding device according to claim 1, characterized in that: The pressing part (46) includes a mounting plate (465) fixedly disposed at the bottom end of the supporting rod (45). A sliding sleeve (460) is provided at the bottom end of the mounting plate (465), and a sliding rod (461) is slidably disposed inside the sliding sleeve (460). A spring (462) is fixedly disposed between the sliding rod (461) and the inside of the sliding sleeve (460). One end of the spring (462) is fixedly connected to the inside of the sliding sleeve (460), and the other end of the spring (462) is fixedly connected to one end of the sliding rod (461). The other end of the sliding rod (461) is fixedly provided with a mounting base (463), and a pressure roller (464) is rotatably provided on the mounting base (463).

5. The battery top cover electrode composite oscillating continuous laser welding device according to claim 1, characterized in that: There is a gap between the clamping part (46) and the weld.

Images