Cylindrical battery welding device

Abstract

This invention provides a cylindrical battery welding device, comprising: a turntable rotatable around its central axis, with multiple first mounting holes evenly distributed around the central axis on the turntable, the first mounting holes penetrating the turntable; a copper nozzle detachably mounted to the first mounting holes, with a welding hole penetrating the copper nozzle, and an extension rod on the copper nozzle, the extension rod having a shielding component for blocking the liquid injection port; a conveying assembly located on one side of the turntable for carrying and conveying the cylindrical battery; and a laser welding assembly located on the other side of the turntable for generating a laser beam that can pass through the welding hole and be projected onto the cylindrical battery for welding. The shielding component of this invention effectively blocks the liquid injection port, thereby preventing welding slag from entering the cylindrical battery through the injection port; simultaneously, the copper nozzle is detachably mounted to the turntable for easy disassembly, and after a certain number of welding operations, the copper nozzle can be easily disassembled for slag removal, which helps ensure production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a cylindrical battery welding device. Background Technology

[0002] The positive electrode of a cylindrical battery is located at one end of a cylindrical steel casing, and a liquid injection port is installed through the positive electrode. During the production of cylindrical batteries, laser welding is used to penetrate and weld the positive electrode to the corresponding positive electrode current collector. However, during the welding process, weld slag may splatter, posing a risk of slag entering the cylindrical battery through the liquid injection port and causing a short circuit. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a cylindrical battery welding device that can effectively prevent welding slag from entering the liquid injection port.

[0004] The embodiments of this utility model are achieved through the following technical solutions:

[0005] A cylindrical battery welding device includes: a turntable rotatable about its central axis, with a plurality of first mounting holes evenly distributed around the central axis on the turntable, the first mounting holes penetrating the turntable; a copper nozzle detachably mounted to the first mounting holes, the copper nozzle having a welding hole penetrating it, and an extension rod provided on the copper nozzle, the extension rod having a shielding component for blocking the liquid injection port; a conveying assembly disposed on one side of the turntable for carrying and conveying the cylindrical battery; and a laser welding assembly disposed on the other side of the turntable for generating a laser beam that can pass through the welding hole and be projected onto the cylindrical battery for welding. The shielding component effectively blocks the liquid injection port, thus preventing welding slag from entering the cylindrical battery through the injection port; simultaneously, the detachable mounting of the copper nozzle to the turntable facilitates disassembly, and after a certain number of welding operations, the copper nozzle can be easily disassembled for slag removal, which helps ensure production efficiency.

[0006] According to a preferred embodiment, the copper nozzle includes a magnetic base plate and a welding part. A second mounting hole is provided through the magnetic base plate, and the welding hole is opened in the welding part. The welding part is embedded in the second mounting hole and is detachably connected to the magnetic base plate. A magnet adapted to the magnetic base plate is disposed on the turntable for magnetically fixing the copper nozzle.

[0007] According to a preferred embodiment, the turntable includes a turntable body and an air blowing block. The turntable body has an air blowing groove on the side facing the conveying assembly. A first through hole is provided through the bottom of the air blowing groove. The air blowing block is embedded in the air blowing groove. A second through hole is provided through the air blowing block. The first through hole and the second through hole are connected and together form the first mounting hole. The magnet is assembled on the air blowing block. The magnetic base plate passes through the first through hole and abuts against the air blowing block or the magnet. The shielding member can extend through the second through hole to the cylindrical battery.

[0008] According to a preferred embodiment, a cyclone frustum is disposed on the side of the pressure welding part facing the air blowing block, with its small end facing the air blowing block; an air cavity groove is disposed on the side surface of the air blowing block facing the pressure welding part, the air cavity groove is a circular groove, and an air inlet groove is formed on the side wall of the air cavity groove, the air inlet groove extending tangentially along the side wall of the air cavity groove; a cyclone hole is provided through the bottom of the air cavity groove, the cyclone hole and the air cavity groove forming a second through hole; the cyclone frustum is embedded in the cyclone hole, and there is an air blowing gap between the cyclone frustum and the cyclone hole.

[0009] According to a preferred embodiment, the cyclone hole is a conical hole adapted to the cyclone frustum.

[0010] According to a preferred embodiment, the width of the blowing gap gradually decreases in the direction from the large end to the small end of the cyclone frustum.

[0011] According to a preferred embodiment, the cylindrical battery welding device further includes a quick-change mechanism and a buffer section. The quick-change mechanism includes a mechanical gripper, a sliding cylinder, a rotary cylinder, and a stand. The rotary cylinder is mounted on the top of the stand, and the sliding cylinder is mounted on the rotary cylinder and driven by the rotary cylinder to rotate. The mechanical gripper is mounted on the sliding cylinder and driven by the sliding cylinder to translate. The mechanical gripper is used to grip the copper nozzle. The stand can move closer to or further away from the turntable so that the mechanical gripper can move between the turntable and the buffer section.

[0012] According to a preferred embodiment, the turntable has an avoidance notch, and the copper nozzle has a hook notch. The hook notch is provided corresponding to the avoidance notch. The mechanical gripper includes a first driving member and a material picking hook. The material picking hook is assembled on the first driving member and can extend into the avoidance notch and hook onto the hook notch.

[0013] According to a preferred embodiment, the cylindrical battery welding device further includes a first cleaning component disposed on one side of the turntable; the first cleaning component is located on the side of the turntable where the copper nozzle is assembled, and the first cleaning component includes a connecting plate, an extension frame, a second driving member, a push plate, and a push block, wherein the extension frame and the second driving member are both assembled on the connecting plate, the extension frame extends toward the turntable, and the free end of the extension frame is equipped with an air blowing ring for conveying gas toward the copper nozzle on the turntable; the push block is assembled on the push plate, and the driving member acts to drive the push plate so that the push block can abut against or disengage from the copper nozzle, and the air blowing ring is sleeved on the push block.

[0014] According to a preferred embodiment, the air blowing ring includes a ring body, on which a plurality of air blowing channels are spaced apart along its circumference, and the air blowing channels are inclined toward the copper nozzle.

[0015] According to a preferred embodiment, the cylindrical battery welding device further includes a second cleaning component, with the turntable positioned between the first and second cleaning components. The second cleaning component includes an adapter plate, a shaft bracket, a third driving component, a brush head, and a motor. The shaft bracket is slidably mounted on the adapter plate, the brush head is rotatably mounted on the shaft bracket, and the motor is mounted on the shaft bracket to drive the brush head to rotate. The third driving component is assembled on the adapter plate to drive the shaft bracket to move, allowing the brush head to abut against or disengage from the copper nozzle. A first dust removal tube is fitted over the brush head. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a front view of the cylindrical battery welding device provided in an embodiment of the present invention.

[0018] Figure 2 A three-dimensional structural diagram of the cylindrical battery welding device (removal and conveying assembly) provided for an embodiment of this utility model;

[0019] Figure 3 First exploded view of the turntable and copper nozzle assembly structure provided in this embodiment of the utility model;

[0020] Figure 4 A second exploded view of the turntable and copper nozzle assembly structure provided in this embodiment of the utility model;

[0021] Figure 5 A three-dimensional structural diagram of the copper nozzle provided in an embodiment of this utility model;

[0022] Figure 6 This is a schematic diagram of the exploded structure of the copper nozzle provided in an embodiment of the present utility model;

[0023] Figure 7 A three-dimensional structural diagram of the air-blowing block provided in an embodiment of this utility model;

[0024] Figure 8 A schematic diagram of the assembly structure of the turntable and the copper nozzle provided in an embodiment of this utility model;

[0025] Figure 9 A three-dimensional structural diagram of the quick-change mechanism provided in an embodiment of this utility model;

[0026] Figure 10 A schematic diagram illustrating the assembly structure of the mechanical gripper, copper nozzle, and turntable provided in an embodiment of this utility model;

[0027] Figure 11 A schematic diagram of the assembly structure of the first cleaning component and the turntable provided in an embodiment of this utility model;

[0028] Figure 12 A three-dimensional structural schematic diagram of the first cleaning component provided in an embodiment of this utility model;

[0029] Figure 13 A three-dimensional structural schematic diagram of the air slip ring provided in an embodiment of this utility model;

[0030] Figure 14 A three-dimensional structural diagram of the second cleaning component provided in an embodiment of this utility model;

[0031] Figure 15 This is a three-dimensional structural diagram of the second cleaning component after the second frame has been removed, provided in an embodiment of the present invention.

[0032] Figure 16 This is a schematic diagram of the assembly structure of the clamp and the cylindrical battery provided in an embodiment of the present invention.

[0033] Icons: 1. First frame; 11. DD motor; 12. Second dust removal pipe; 2. Turntable; 20. First mounting hole; 21. Turntable body; 211. Air blowing channel; 2111. First air guide hole; 212. First through hole; 2121. Clearance notch; 22. Air blowing block; 221. Second through hole; 222. Magnet; 223. Air chamber groove; 224. Cyclone hole; 225. Air inlet groove; 226. Second air guide hole; 23. Air blowing gap; 3. Copper nozzle; 301. Pressure welding part; 3011. Welding hole; 3012. Cyclone frustum; 302. Magnetic base plate; 3021. Second mounting hole; 3022. Hook notch; 31. Extension rod; 311. Blocking component; 4. Conveying assembly; 41. Gripper; 42. Adjustment 43. Segment; 44. Base plate; 45. Guide shaft; 56. Spring; 6. Laser welding assembly; 77. Laser beam; 8. Cylindrical battery; 98. Quick-change mechanism; 10. Mechanical gripper; 11. Material picking hook; 12. First drive component; 13. Slide cylinder; 14. Rotary cylinder; 15. Stand; 16. Buffer section; 17. Buffer plate; 18. First cleaning assembly; 19. Connecting plate; 10. Extension frame; 11. Second drive component; 12. Push plate; 13. Push block; 14. Air blowing ring; 19. Second cleaning assembly; 10. Second frame; 11. Adapter plate; 12. Third drive component; 13. Shaft frame; 14. Protective sheet metal; 15. First dust removal pipe; 16. Brush head; 17. Motor. Detailed Implementation

[0034] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0035] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0037] Please refer to Figures 1 to 16A cylindrical battery welding device includes a turntable 2, a copper nozzle 3, a conveying assembly 4, a laser welding assembly 5, and a first frame 1. The turntable 2 is rotatably mounted on the first frame 1, specifically via a DD motor 11, allowing it to rotate around its central axis. Multiple first mounting holes 20 are evenly distributed around the central axis on the turntable 2, penetrating the turntable 2. The copper nozzle 3 is detachably mounted to the first mounting holes 20. A welding hole 3011 is provided through the copper nozzle 3. An extension rod 31 is provided on the copper nozzle 3, and a blocking element 311 for blocking the liquid injection port is provided on the extension rod 31. The conveying assembly 4 is located on one side of the turntable 2 and is used to carry and convey the cylindrical battery 6. The laser welding assembly 5 is located on the other side of the turntable 2 and is used to generate a laser beam 51. The laser beam 51 can pass through the welding hole 3011 and be projected onto the cylindrical battery 6 for welding. Figure 2 As shown, there are four first mounting holes 20, meaning that four copper nozzles 3 can be mounted on the turntable 2. Each 90° rotation of the turntable 2 performs one welding operation. Specifically, the welding station is at the lowest copper nozzle 3. The conveying component 4 can transport the cylindrical battery 6 to the welding station, corresponding to the copper nozzle 3 at the welding station. It is understood that the weld seam trajectory on the positive electrode of the cylindrical battery 6 does not coincide with the liquid injection port. The extension rod 31 and the shielding component 311 do not affect the laser beam 51 from being projected onto the positive electrode of the cylindrical battery 6 through the welding hole 3011 to form a weld seam. During the welding process, the shielding component 311 can effectively block the liquid injection port, thereby preventing welding slag from entering the interior of the cylindrical battery 6 through the liquid injection port. In this embodiment, the copper nozzle 3 is detachably mounted on the turntable 2 for easy disassembly. After a certain number of welding operations, the copper nozzle 3 can be easily disassembled for slag removal, which helps ensure production efficiency.

[0038] like Figure 5 and Figure 6 As shown, the copper nozzle 3 includes a magnetic base plate 302 and a welding part 301. A second mounting hole 3021 is provided through the magnetic base plate 302, and a welding hole 3011 is formed in the welding part 301. The welding part 301 is embedded in the second mounting hole 3021 and detachably connected to the magnetic base plate 302. A magnet 222 adapted to the magnetic base plate 302 is disposed on the turntable 2 for magnetically fixing the copper nozzle 3. In this embodiment, as... Figure 6 As shown, the second mounting hole 3021 is a stepped hole, with the larger end facing the pressure welding part 301. The second mounting hole 3021 is coaxial with the welding hole 3011. The pressure welding part 301 and the magnetic base plate 302 are detachably connected by screws or bolts, facilitating shape change. The copper nozzle 3 is fixed to the turntable 2 by magnetic attraction, which facilitates quick installation and removal of the copper nozzle 3 on the turntable 2.

[0039] like Figure 3 , Figure 4 and Figure 7As shown, the turntable 2 includes a main body 21 and an air-blowing block 22. An air-blowing groove 211 is provided on the side of the main body 21 facing the conveying assembly 4. A first through hole 212 is provided through the bottom of the air-blowing groove 211. The air-blowing block 22 is embedded in the air-blowing groove 211, and a second through hole 221 is provided through the air-blowing block 22. The first through hole 212 and the second through hole 221 are connected, forming a first mounting hole 20. A magnet 222 is assembled on the air-blowing block 22. A magnetic base plate 302 passes through the first through hole 212 and abuts against the air-blowing block 22 or the magnet 222. A blocking member 311 can extend through the second through hole 221 to the cylindrical battery 6. The first through hole 212 and the second through hole 221 are coaxial. Preferably, the magnet 222 is embedded in the air-blowing block 22, and the magnetic base plate 302 passes through the first through hole 212 and abuts against the air-blowing block 22. This configuration allows for the replacement of the turntable 2 by simply changing the air-blowing block 22, thus saving costs. In this embodiment, preferably, the air-blowing block 22 is detachably mounted to the disc body 21 by screws or bolts.

[0040] like Figures 4 to 6 As shown, a cyclone frustum 3012 is arranged on the side of the pressure welding part 301 facing the air blowing block 22, with its small end facing the air blowing block 22; an air cavity groove 223 is arranged on the side surface of the air blowing block 22 facing the pressure welding part 301. The air cavity groove 223 is a circular groove, and an air inlet groove 225 is opened on the side wall of the air cavity groove 223. The air inlet groove 225 extends tangentially along the side wall of the air cavity groove 223; a cyclone hole 224 is provided through the bottom of the air cavity groove 223, and the cyclone hole 224 and the air cavity groove 223 form a second through hole 221; the cyclone frustum 3012 is embedded in the cyclone hole 224, and there is an air blowing gap 23 between the cyclone frustum 3012 and the cyclone hole 224. In this embodiment, protective gas is introduced into the air chamber 223 through the air inlet 225. The protective gas flow enters the air chamber 223 tangentially and forms an annular airflow within the air chamber 223 under the action of the inner sidewall. This annular airflow overflows through the blowing gap 23 under the action of the cyclone frustum 3012, forming a spiral airflow. Specifically, during the welding process, the spiral airflow formed by the protective gas acts on the positive electrode welding area of ​​the cylindrical battery 6. The airflow is uniform, ensuring a stable gas environment within the positive electrode welding area, thereby ensuring stable welding quality of the cylindrical battery 6. In addition, the spiral airflow can disperse the spatter generated during the welding process, which is beneficial to improving the dust extraction effect.

[0041] In this embodiment, as Figure 8 As shown, the magnetic base plate 302 abuts against the air blowing block 22, and the pressure welding part 301 can cover the air cavity groove 223 to form a nearly closed cavity, ensuring the flow and pressure of the protective gas in the direction of the air blowing gap 23.

[0042] Furthermore, the cyclone hole 224 is a conical hole adapted to the cyclone frustum 3012.

[0043] Optionally, the width of the air-blowing gap 23 gradually decreases from the large end to the small end of the cyclone frustum 3012. It should be noted that within the air-blowing gap 23, the protective gas spirals forward from the large end to the small end of the cyclone frustum 3012. That is, the protective gas moves both circumferentially around the cyclone frustum 3012 and translates along the direction from the large end to the small end of the cyclone frustum 3012; the superposition of these two motion states forms the aforementioned spiral airflow. With this configuration, the flow channel of the spiral airflow gradually narrows from the large end to the small end of the cyclone frustum 3012, while its velocity gradually increases. This enhances the force exerted by the protective gas on the welding area of ​​the cylindrical battery 6, resulting in better air removal from the welding area and improved dust control of welding spatter.

[0044] In this embodiment, as Figure 4 and Figure 7 As shown, an air inlet (not shown in the figure) is configured inside the turntable 2. A first air guide hole 2111 is provided on the side wall of the air blowing groove 211, and a second air guide hole 226 is provided on the air blowing block 22. The first guide hole and the second air guide hole 226 are correspondingly arranged to connect the air inlet and the second air guide hole 226. The second air guide hole 226 is connected to the air inlet groove 225. Specifically, the air inlet is connected to a protective gas source. The turntable 2 rotates, and a slip ring (not shown in the figure) is used to achieve continuous input of protective gas, which is existing technology and will not be described in detail here.

[0045] like Figure 2 and Figure 9 As shown, the cylindrical battery welding device also includes a quick-change mechanism 71 and a buffer section 72. The quick-change mechanism 71 includes a mechanical gripper 711, a sliding cylinder 712, a rotary cylinder 713, and a stand 714. The rotary cylinder 713 is mounted on the top of the stand 714, and the sliding cylinder 712 is mounted on and driven by the rotary cylinder 713 to rotate. The mechanical gripper 711 is mounted on the sliding cylinder 712 and driven by the sliding cylinder 712 to translate. The mechanical gripper 711 is used to grip the copper nozzle 3. The stand 714 can move closer to or further away from the turntable 2, allowing the mechanical gripper 711 to move between the turntable 2 and the buffer section 72. Specifically, the stand 714 is mounted on a linear module and driven by the linear module to move closer to or further away from the turntable 2. Optionally, both the quick-change mechanism 71 and the buffer section 72 are located on one side of the magnetic mounting plate 302 of the turntable 2. When the impurities attached to the copper nozzle 3 reach a certain level during use, the copper nozzle 3 on the turntable 2 is disassembled and transferred to the buffer section 72 by the quick-change mechanism 71. Then, the copper nozzle 3 on the buffer section 72 is assembled onto the turntable 2 to achieve quick replacement of the copper nozzle 3.

[0046] Furthermore, such as Figure 3 , Figure 5 , Figure 9 and Figure 10 As shown, a clearance notch 2121 is provided on the wall of the first through hole 212, and a hook notch 3022 is provided on the copper nozzle 3, specifically on the magnetic base plate 302. The hook notch 3022 is correspondingly provided with the clearance notch 2121. The mechanical gripper 711 includes a first driving component 7112 and a picking hook 7111, which is assembled to the first driving component 7112. Optionally, the first driving component 7112 is a finger cylinder, and there are two picking hooks 7111, which are assembled to and driven by the finger cylinder. When in use, the material-picking hook 7111 extends into the clearance notch 2121 and hooks onto the hook notch 3022. Under the action of the slide cylinder 712, the copper nozzle 3 is separated from the turntable 2. The rotary cylinder 713 rotates to adjust the posture of the mechanical gripper 711. In conjunction with the linear module and the slide cylinder 712, the disassembled copper nozzle 3 is transferred to the buffer section 72.

[0047] like Figure 2 As shown, the buffer unit 72 includes a buffer plate 721, on which a buffer hole (not shown in the figure) for embedding the copper nozzle 3 is provided through.

[0048] like Figure 2 , Figure 11 , Figure 12 and Figure 13 As shown, the cylindrical battery welding device also includes a first cleaning component 8 and a second cleaning component 9, with the turntable 2 positioned between the first cleaning component 8 and the second cleaning component 9. The first cleaning component 8 is located on the side of the turntable 2 where the copper nozzle 3 is mounted. The first cleaning component 8 includes a connecting plate 81, an extension frame 82, a second driving component 83, a push plate 84, and a push block 85. The connecting plate 81 is mounted on the first frame 1, and the extension frame 82 and the second driving component 83 are both mounted on the connecting plate 81. The extension frame 82 extends towards the turntable 2, and a blowing ring 86 is mounted on the free end of the extension frame 82 for delivering gas toward the copper nozzle 3 on the turntable 2 to lift up impurities generated by the second cleaning component 9 cleaning the copper nozzle 3, facilitating dust extraction. The push block 85 is mounted on the push plate 84, and the driving component acts on the push plate 84 to allow the push block 85 to abut against or disengage from the copper nozzle 3. The blowing ring 86 is sleeved on the push block 85.

[0049] like Figure 13As shown, the air-blowing ring 86 includes a ring body with multiple air-blowing channels spaced circumferentially on it, inclined towards the copper nozzle 3. Furthermore, the central axes of the multiple air-blowing channels intersect at a single point, thus concentrating the airflow to the copper nozzle 3 and improving cleaning efficiency. In this embodiment, a connecting groove (not shown in the figure) is provided on the ring body to connect all the air-blowing channels in series, and the connecting groove is connected to an air source (not shown in the figure). The gas here can be air, primarily serving to disperse dust. The protective gas mentioned earlier can be nitrogen, used to prevent oxidation of the solder joints.

[0050] In use, the second cleaning component 9 is used to remove impurities from the copper nozzle 3 on the opposite side of the first cleaning component 8. During this process, the first cleaning component 8 blows air to disperse dust, while the push block 85 abuts against the copper nozzle 3 to limit it, so as to prevent the copper nozzle 3 from falling off the turntable 2 due to the force of the second cleaning component 9.

[0051] In this embodiment, as Figure 2 , Figure 14 and Figure 15 As shown, the second cleaning component 9 includes a second frame 91, an adapter plate 911, a shaft bracket 93, a third drive component 92, a brush head 96, and a motor 97. The adapter plate 911 is fixedly mounted to the second frame 91. The shaft bracket 93 is slidably mounted to the adapter plate 911 via a slide rail slider assembly. The brush head 96 is rotatably mounted to the shaft bracket 93. The motor 97 is mounted to the shaft bracket 93 and drives the brush head 96 to rotate. The third drive component 92 is assembled to the adapter plate 911 and drives the shaft bracket 93 to move, allowing the brush head 96 to contact or disengage from the copper nozzle 3. Figure 14 As shown, the brush head 96 is fitted with a first dust removal tube 95, which is connected to a negative pressure generator (not shown) for use in conjunction with the first cleaning component 8 to remove dust. During use, the brush cleans impurities from the copper nozzle 3.

[0052] It should be noted that, due to the limited cleaning capacity of the brush, after a certain number of cleaning cycles, the copper nozzle 3 needs to be disassembled and replaced via the quick-change mechanism 71. The disassembled copper nozzle 3 is then manually cleaned to remove impurities. This allows the equipment to operate without stopping, ensuring production efficiency.

[0053] In this embodiment, as Figure 14 As shown, a protective sheet metal 94 is mounted on the shaft bracket 93 to prevent impurities from affecting the operation of the motor 97.

[0054] Preferably, the second drive member 83 and the third drive member 92 are cylinders.

[0055] In this embodiment, optionally, the conveying assembly 4 is a magnetic drive conveyor line, and a clamp for holding the cylindrical battery 6 is configured on the mover of the magnetic drive conveyor line. Figure 16As shown, the fixture includes a base plate 43, an adjusting block 42, and grippers 41. A guide shaft 44 is mounted on the base plate 43. The adjusting block 42 is slidably sleeved on the guide shaft 44. A spring 45 is sleeved on the guide shaft 44, and the spring 45 acts on the adjusting block 42 to cause it to tend to move away from the turntable 2. Two grippers 41 are adjustablely mounted on the adjusting block 42 for gripping the cylindrical battery 6. Optionally, the grippers 41 are slidably connected to the adjusting block 42 via a slide rail slider. The two grippers 41 can be driven by a finger cylinder or other driving component to move closer or further apart to grip or unlock the circumferential battery. This is existing technology and will not be described in detail here. In use, a cylinder or electric actuator acts on the adjusting block 42 to compress the spring 45, causing it to move towards the copper nozzle 3 at the welding station until the blocking component 311 effectively blocks the liquid injection port, allowing welding to proceed.

[0056] In this embodiment, preferably, the shielding member 311 is cylindrical, and in use, the shielding member 311 is inserted into the liquid injection port. In another embodiment, the shielding member 311 can also be disc-shaped, which is attached to the positive terminal surface of the cylindrical battery 6 to shield the liquid injection port.

[0057] In this embodiment, as Figure 1 As shown, a second dust removal pipe 12 is installed on the first frame 1. The air inlet of the second dust removal pipe 12 faces the copper nozzle 3 located at the welding station, and is used for dust removal during the welding process. It should be noted that during welding, the laser beam 51 passes through the second dust removal pipe 12 and is projected onto the positive electrode of the cylindrical battery 6.

[0058] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A cylindrical battery welding device, characterized in that, include: A turntable, the turntable being able to rotate about its central axis, and a plurality of first mounting holes evenly distributed around the central axis on the turntable, the first mounting holes penetrating the turntable; A copper nozzle is detachably mounted to the first mounting hole. A welding hole is provided through the copper nozzle. An extension rod is provided on the copper nozzle. A blocking component for blocking the injection port is provided on the extension rod. A conveying assembly, located on one side of the turntable, is used to carry and convey cylindrical batteries; A laser welding assembly, located on the other side of the turntable, is used to generate a laser beam that can pass through the welding hole and be projected onto the cylindrical battery for welding.

2. The cylindrical battery welding apparatus according to claim 1, characterized in that, The copper nozzle includes a magnetic base plate and a pressure welding part. A second mounting hole is provided through the magnetic base plate. The welding hole is opened in the pressure welding part. The pressure welding part is embedded in the second mounting hole and is detachably connected to the magnetic base plate. The turntable is equipped with magnets that are compatible with the magnetic base plate, which are used to magnetically fix the copper nozzle.

3. The cylindrical battery welding apparatus according to claim 2, characterized in that, The turntable includes a turntable body and an air blowing block. An air blowing groove is provided on the side of the turntable body facing the conveying component. A first through hole is provided through the bottom of the air blowing groove. The air blowing block is embedded in the air blowing groove. A second through hole is provided through the air blowing block. The first through hole and the second through hole are connected and together form the first mounting hole. The magnet is mounted on the air-blowing block, the magnetic base plate passes through the first through hole and abuts against the air-blowing block or the magnet, and the shielding member can extend through the second through hole to the cylindrical battery.

4. The cylindrical battery welding apparatus according to claim 3, characterized in that, The pressure welding part is provided with a cyclone frustum on the side facing the air blowing block, with its small end facing the air blowing block; The air blowing block is provided with an air cavity groove on the side facing the pressure welding part. The air cavity groove is a circular groove. An air inlet groove is provided on the side wall of the air cavity groove. The air inlet groove extends tangentially along the side wall of the air cavity groove. A cyclone hole is provided through the bottom of the air cavity groove, and the cyclone hole and the air cavity groove form the second through hole; The cyclone frustum is embedded in the cyclone hole, and there is a blowing gap between the cyclone frustum and the cyclone hole.

5. The cylindrical battery welding apparatus according to claim 4, characterized in that, The cyclone hole is a conical hole adapted to the cyclone frustum.

6. The cylindrical battery welding apparatus according to claim 4 or 5, characterized in that, The width of the blowing gap gradually decreases in the direction from the large end to the small end of the cyclone frustum.

7. The cylindrical battery welding apparatus according to claim 1, characterized in that, The cylindrical battery welding device also includes a quick-change mechanism and a buffer unit, wherein the quick-change mechanism includes a mechanical gripper, a sliding cylinder, a rotary cylinder and a stand; A rotary cylinder is mounted on the top of the stand, and a sliding cylinder is mounted on the rotary cylinder and driven by the rotary cylinder to rotate; a mechanical gripper is mounted on the sliding cylinder and driven by the sliding cylinder to translate; the mechanical gripper is used to grip the copper nozzle. The stand can move closer to or further away from the turntable so that the mechanical gripper can move between the turntable and the buffer section.

8. The cylindrical battery welding apparatus according to claim 7, characterized in that, The turntable has an avoidance notch, and the copper nozzle has a hook notch. The hook notch is set in correspondence with the avoidance notch. The mechanical gripper includes a first driving component and a material picking hook. The material picking hook is assembled on the first driving component and can extend into the avoidance notch and hook onto the hook notch.

9. The cylindrical battery welding apparatus according to claim 1, characterized in that, The cylindrical battery welding device also includes a first cleaning component disposed on one side of the turntable; The first cleaning component is located on the side of the turntable where the copper nozzle is assembled. The first cleaning component includes a connecting plate, an extension frame, a second driving member, a push plate, and a push block. The extension frame and the second driving member are both assembled on the connecting plate. The extension frame extends toward the turntable, and the free end of the extension frame is equipped with an air blowing ring for delivering gas toward the copper nozzle on the turntable. The push block is assembled on the push plate, and the driving member acts to drive the push plate so that the push block can abut against or disengage from the copper nozzle. The air blowing ring is sleeved on the push block.

10. The cylindrical battery welding apparatus according to claim 9, characterized in that, The air blowing ring includes a ring body, on which a plurality of air blowing channels are arranged at intervals along its circumference, and the air blowing channels are inclined toward the copper nozzle.

11. The cylindrical battery welding apparatus according to claim 9, characterized in that, The cylindrical battery welding device further includes a second cleaning component, with the turntable positioned between the first and second cleaning components; The second cleaning component includes an adapter plate, a shaft bracket, a third drive component, a brush head, and a motor. The shaft bracket is slidably mounted on the adapter plate, the brush head is rotatably mounted on the shaft bracket, and the motor is mounted on the shaft bracket to drive the brush head to rotate. The third driving component is assembled on the adapter plate and is used to drive the shaft frame to move so that the brush head can abut against or disengage from the copper nozzle. The brush head is covered with a first dust removal tube.

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