A lithium battery cap press welding machine

Abstract

The present invention relates to the technical field of battery production, and discloses a lithium battery cap press welding integrated machine, comprising a base plate, a lifting platform, a press welding machine and a lithium battery cell, the lifting platform is fixedly connected to the upper surface of the base plate, the press welding machine is slidably connected inside, a lithium battery cell is arranged above the base plate, and a vertical press welding assembly for keeping the cap and the lithium battery cell vertical when welding is arranged above the base plate; by rotating a main drive turntable and a driven turntable at the same speed, symmetrical clamping plates limit the sliding of the lithium battery cell, so that when the lithium battery cell loaded on the first circular plate and the cap loaded on the second circular plate rotate to the bottom of the press welding machine, the lithium battery cell and the cap are in a vertical state with their axes in line, so that the point that can be welded by the press welding machine in the process of downward press welding is at the center position of the cap and the lithium battery cell, so as to avoid uneven stress distribution in the welding process due to misalignment of the cap and the lithium battery cell.

Description

Technical Field

[0001] The invention relates to the technical field of battery production, and in particular to a lithium battery cap press-welding integrated machine. Background Art

[0002] With the rapid development of new energy vehicles, portable electronic devices and other fields, the demand for lithium batteries, as an important energy storage component, has increased dramatically. The welding quality and sealing performance of lithium battery caps, as important components of batteries, have a significant impact on the overall performance and service life of the battery.

[0003] The existing welding method is to place the cap on the top of the battery to weld it. During the welding process, the contact between the welder and the cap will cause the cap to shake. If the position of the cap is not adjusted, the cap and the lithium battery will be eccentrically misaligned and loose, resulting in poor contact due to slight collisions during daily use, causing inconvenience to users. The loose cap will affect the sealing of the battery and cause electrolyte leakage. At the same time, the looseness may also cause poor contact of the connecting wire or the conductive terminal, thereby affecting the normal charging and discharging process of the battery, and may even cause serious consequences such as short circuits.

[0004] During the pressure welding process, because the welding machine needs to extrude and weld the cap at the same time, the molten liquid will adhere to the welding gun after the cap is partially melted on the surface, causing the cap to be connected to the welding gun and the battery at the same time. At this time, if the connection area between the cap and the welding gun is larger than the welding area with the lithium battery, the cap will be separated from the lithium battery when the welding machine moves, resulting in invalid welding, reducing the efficiency of the welding between the lithium battery and the cap.

[0005] To this end, a lithium battery cap press welding machine is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a lithium battery cap press welding machine to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a lithium battery cap press welding machine, comprising a bottom plate, a lifting platform, a press welding machine and a lithium battery cell, the lifting platform is fixedly connected to the upper surface of the bottom plate, the press welding machine is slidably connected inside, a lithium battery cell is arranged above the bottom plate, a vertical press welding assembly is arranged above the bottom plate for keeping the cap and the lithium battery cell vertical when welding, a loading anti-blocking assembly is arranged above the bottom plate for preventing the lithium battery cell from getting stuck during loading, an anti-loosening assembly is arranged above the bottom plate for preventing the lithium battery cell from shaking when welding the cap, and an automatic unloading assembly for facilitating continuous unloading is arranged above the bottom plate;

[0008] The vertical pressure welding assembly includes a main drive turntable rotatably connected to the upper surface of the base plate, the outer wall of the main drive turntable is fixedly connected with a gear ring distributed in an annular array, the upper surface of the main drive turntable is fixedly connected with a first circular plate, the middle part of the upper surface of the first circular plate is fixedly connected with a first cylinder, the upper surface of the first cylinder is fixedly connected with a first disc, the upper surface of the base plate is rotatably connected with a driven turntable, the main drive turntable and the driven turntable are meshed with each other, the middle part of the upper surface of the driven turntable is fixedly connected with a second cylinder, the upper surface of the second cylinder is fixedly connected with a second disc, the upper surface of the second disc is provided with circular holes, the inside of the circular holes is fixedly connected with a limiting rubber plate distributed in an annular array, the upper surface of the base plate is fixedly connected with a feeding rack, and the feeding rack is a through pipe on one side above the second disc.

[0009] Preferably, the vertical pressure welding assembly also includes a carrier plate rotatably connected to the upper surface of the first circular plate in a circular array, the upper surface of the first circular plate is provided with sliding grooves distributed in a circular array, the carrier plate is rotatably connected to the middle part of the sliding groove, the interior of the sliding groove of the first circular plate is symmetrically connected to the first bracket and the second bracket with the carrier plate as the center, both ends of the lower surfaces of the first bracket and the second bracket are slidably connected to the interior of the sliding groove, the interior of the sliding groove of the first circular plate is symmetrically connected to the limiting slide plate with the carrier plate as the center, the upper surface of the limiting slide plate is symmetrically provided with straight grooves, both ends of the upper surfaces of the first bracket and the second bracket are slidably connected to the interior of the straight groove, a first spring is fixedly connected between the limiting slide plate and the inner wall of the first circular plate, and a clamp is fixedly connected to the upper surface of the limiting slide plate.

[0010] Preferably, the feeding anti-blocking component includes a third disk rotatably connected to the upper surface of the bottom plate, the third disk and the main drive turntable are transmission-connected by a transmission belt, the upper surface of the third disk is eccentrically rotatably connected to a straight groove plate, the inner side of the straight groove plate is slidingly connected to a sliding rod, the upper surface of the bottom plate is fixedly connected to a vertical frame, the side of the vertical frame close to the third disk is fixedly connected to a feeding box, the inner side of the feeding box is slidingly connected to a first push plate, the lower surface of the first push plate is fixedly connected to the upper surface of the sliding rod, the inner side of the first push plate is rotatably connected to a rotating shaft, the outer wall of the rotating shaft is transmission-connected to a conveyor belt, the outer wall of the conveyor belt is fixedly connected to a U-shaped clamp, the side of the feeding box close to the vertical frame is fixedly connected to a limiting box, the inner wall of the limit box is slidably connected to a second push plate, and the side of the limit box close to the rotating shaft is symmetrically fixedly connected to a convex plate.

[0011] Preferably, the anti-loosening assembly includes a first baffle plate rotatably connected to the lower surface of the feeding rack through pipe, a torsion spring is sleeved at the rotational connection between the first baffle plate and the through pipe, a first arc-shaped plate is fixedly connected to the side of the upper surface of the second disc close to the circular hole, a support plate is fixedly connected to the outer wall of the feeding rack through pipe, a first cross plate is rotationally connected to the side of the lower surface of the support plate away from the through pipe, a second spring is sleeved at the rotational connection between the first cross plate and the support plate, a second arc-shaped plate is rotationally connected to the side of the first cross plate close to the pressure welding machine, a second cross plate is slidably connected to the side of the first cross plate away from the pressure welding machine, a third spring is fixedly connected between the opposite surfaces of the second cross plate and the first cross plate, and a stopper is fixedly connected to the upper surface of the second disc.

[0012] Preferably, the automatic unloading assembly includes a rotating plate rotatably connected to the upper surface of the base plate, the top of the rotating plate is fixedly connected to a second baffle, the second baffle is fixedly connected to a U-shaped plate on the side close to the lifting platform, the upper surface of the base plate is fixedly connected to a collecting box, and the side of the collecting box close to the second baffle is fixedly connected to a corner plate.

[0013] Preferably, a motor is provided inside the lifting platform to adjust the pressure welding machine up and down, a motor is provided inside the rotating shaft to drive the conveyor belt to transport the lithium battery cells, and a motor is provided inside the limit box to drive the second push plate to slide back and forth inside the limit box, and the spacing between the symmetrical convex plates is equal to the width of the conveyor belt.

[0014] Preferably, the main drive rotary disc and the driven rotary disc have the same diameter, and the transmission ratio between the main drive rotary disc and the third disc through the transmission belt is 1:4.

[0015] Preferably, a side of the second transverse plate away from the first transverse plate is configured as an inclined surface, and a side of the stopper close to the second transverse plate is configured as an inclined surface.

[0016] Preferably, the side of the second baffle plate close to the first circular plate is located above the first circular plate, the closed space formed by the U-shaped plate and the second baffle plate is equal to the diameter of the lithium battery cell, and a torsion spring is fixedly connected between the rotating plate and the bottom plate.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. Through the simultaneous rotation of the main drive turntable and the driven turntable, the symmetrical clamping plates limit the sliding of the lithium battery cells, so that when the lithium battery cells loaded on the first disc and the caps loaded on the second disc rotate to the bottom of the pressure welder, the lithium battery cells and the caps are in a vertical and coaxial state, so that the welding point that the pressure welder can weld during the downward pressure welding process is at the center of the cap and the lithium battery cells, avoiding uneven stress distribution during welding due to the misalignment of the cap and the lithium battery cells, and the quality of the welding points cannot be guaranteed, which reduces the occurrence of problems such as weld cracks, cold welding or weld adhesion, and improves the stability of the lithium battery cells after welding and the quality of the battery. The coaxiality of the lithium battery cells and the caps makes the lithium battery cells easy to package, avoiding the problem of gaps between the cap and the outer layer of the package when the outer ring of the lithium battery cells is sealed and wrapped due to the eccentricity of the cap, reducing the problems of electrolyte leakage and gas intrusion inside the lithium battery cells, and improving the safety and service life of the battery;

[0019] 2. When the second disc rotates, the second arc plate and the first arc plate clamp the cap, so that the cap is in a state of being in line with the axis of the lithium battery cell after moving to the bottom of the pressure welding machine, so as to avoid the cap from being deflected by the centrifugal force during the rotation of the cap on the second disc, thereby ensuring the neatness and stability of the welding of the lithium battery cell and the cap. At the same time, the second arc plate and the first arc plate clamp the cap, so as to avoid the pressure welding machine from sticking to the cap during pressure welding, and the cap is driven to move together after the welding machine moves, resulting in the problem of the cap and the lithium battery cell being separated from each other by welding, thereby improving the efficiency of the welding of the lithium battery cell and the cap.

[0020] 3. The second push plate slides back and forth inside the limit box, so that the lithium battery cell that slides into the limit box can be quickly pushed into the first circular plate by the first push plate. During the pushing process, the lithium battery cell is fitted with the surface of the second push plate to restrict the posture of the lithium battery cell inside the limit box, thereby preventing the lithium battery cell from being blocked inside the limit box due to skew after falling into the limit box. The conveyor belt places the lithium battery cells into the feeding box one by one through the U-shaped clip on its surface, which can prevent the lithium battery cells from colliding with each other during delivery and causing damage, thereby ensuring that the lithium battery pressure welding process is smoother and the stability of the lithium battery during transmission is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic top view of the overall structure of the present invention;

[0023] Figure 3 It is a side view schematic diagram of the overall structure of the present invention;

[0024] Figure 4It is a partial schematic diagram of the structure of the feeding anti-blocking component of the present invention;

[0025] Figure 5 It is a schematic diagram of the overall structure of the vertical pressure welding assembly of the present invention;

[0026] Figure 6 This is a schematic diagram of the interior of the first circular plate structure of the present invention;

[0027] Figure 7 It is a partial schematic diagram of the anti-loosening component structure of the present invention;

[0028] Figure 8 For the present invention Figure 7 A schematic diagram of the structure enlargement in the middle;

[0029] Fig. 9 It is a partial schematic diagram of the automatic blanking component structure of the present invention.

[0030] In the figure:

[0031] 11. Bottom plate; 12. Lifting platform; 13. Pressure welding machine; 14. Lithium battery cell;

[0032] 2. Vertical pressure welding assembly; 21. Main drive rotary disc; 22. Gear ring; 23. First circular plate; 24. First cylinder; 25. First circular disc; 26. Driven rotary disc; 27. Second cylinder; 28. Second circular disc; 29. ​​Feeding rack; 210. Carrier plate; 211. First bracket; 212. Second bracket; 213. Limiting slide plate; 214. Straight notch; 215. First spring; 216. Clamp;

[0033] 3. Feeding anti-blocking assembly; 31. Third disc; 32. Transmission belt; 33. Straight groove plate; 34. Slide bar; 35. Stand; 36. Feeding box; 37. First push plate; 38. Rotating shaft; 39. Conveyor belt; 310. U-shaped clip; 311. Limit box; 312. Second push plate; 313. Conveyor plate;

[0034] 4. Anti-loosening assembly; 41. First baffle plate; 42. First arc plate; 43. Support plate; 44. First transverse plate; 45. Second spring; 46. Second arc plate; 47. Second transverse plate; 48. Third spring; 49. Stopper;

[0035] 5. Automatic unloading assembly; 51. Turning plate; 52. Second baffle; 53. U-shaped plate; 54. Collection box; 55. Angle plate. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Embodiments of the present invention

[0038] See also Figures 1 to 9 A lithium battery cap press welding machine comprises a bottom plate 11, a lifting platform 12, a press welder 13 and a lithium battery cell 14, the lifting platform 12 is fixedly connected to the upper surface of the bottom plate 11, the press welder 13 is slidably connected inside the press welder 13, a lithium battery cell 14 is arranged above the bottom plate 11, a vertical press welding assembly 2 is arranged above the bottom plate 11 for keeping the cap and the lithium battery cell 14 vertical when welding, a loading anti-blocking assembly 3 is arranged above the bottom plate 11 for preventing the lithium battery cell 14 from getting stuck when loading, an anti-loosening assembly 4 is arranged above the bottom plate 11 for preventing the lithium battery cell 14 from shaking when welding the cap, and an automatic unloading assembly 5 is arranged above the bottom plate 11 for facilitating continuous unloading;

[0039] The vertical pressure welding assembly 2 includes a main drive turntable 21 rotatably connected to the upper surface of the base plate 11, the outer wall of the main drive turntable 21 is fixedly connected with a gear ring 22 in a circular array, the upper surface of the main drive turntable 21 is fixedly connected with a first circular plate 23, the middle part of the upper surface of the first circular plate 23 is fixedly connected with a first cylinder 24, the upper surface of the first cylinder 24 is fixedly connected with a first disc 25, the upper surface of the base plate 11 is rotatably connected with a driven turntable 26, the main drive turntable 21 and the driven turntable 26 are meshed with each other, the middle part of the upper surface of the driven turntable 26 is fixedly connected with a second cylinder 27, the upper surface of the second cylinder 27 is fixedly connected with a second disc 28, the upper surface of the second disc 28 is provided with circular holes, the inside of the circular holes is fixedly connected with a limiting rubber plate in a circular array, the upper surface of the base plate 11 is fixedly connected with a feeding rack 29, and the feeding rack 29 is located on one side above the second disc 28 as a through pipe.

[0040] The vertical pressure welding assembly 2 also includes a carrier plate 210 that is rotatably connected to the upper surface of the first circular plate 23 in a circular array. The upper surface of the first circular plate 23 is provided with slide grooves that are distributed in a circular array. The carrier plate 210 is rotatably connected to the middle of the slide groove. The interior of the slide groove of the first circular plate 23 is symmetrically rotatably connected with a first bracket 211 and a second bracket 212 with the carrier plate 210 as the center. Both ends of the lower surfaces of the first bracket 211 and the second bracket 212 are slidably connected to the interior of the slide groove. The interior of the slide groove of the first circular plate 23 is symmetrically slidably connected with a limiting slide plate 213 with the carrier plate 210 as the center. Straight slots 214 are symmetrically provided on the upper surface of the limiting slide plate 213. Both ends of the upper surfaces of the first bracket 211 and the second bracket 212 are slidably connected to the interior of the straight slot 214. A first spring 215 is fixedly connected between the limiting slide plate 213 and the inner wall of the first circular plate 23, and a clamping plate 216 is fixedly connected to the upper surface of the limiting slide plate 213.

[0041] The feeding anti-blocking component 3 includes a third disc 31 rotatably connected to the upper surface of the bottom plate 11, a transmission belt 32 is connected between the third disc 31 and the main drive turntable 21, a straight groove plate 33 is eccentrically connected to the upper surface of the third disc 31, a slide bar 34 is slidably connected inside the straight groove plate 33, a stand 35 is fixedly connected to the upper surface of the bottom plate 11, a feeding box 36 is fixedly connected to the side of the stand 35 close to the third disc 31, and a first push plate is slidably connected inside the feeding box 36 37, the lower surface of the first push plate 37 is fixedly connected to the upper surface of the slide rod 34, the first push plate 37 is internally rotatably connected to the rotating shaft 38, the outer wall of the rotating shaft 38 is transmission-connected to the conveyor belt 39, the outer wall of the conveyor belt 39 is fixedly connected to the U-shaped clamp 310, the side of the feed box 36 close to the stand 35 is fixedly connected to the limit box 311, the inner wall of the limit box 311 is slidably connected to the second push plate 312, and the side of the limit box 311 close to the rotating shaft 38 is symmetrically fixedly connected to the convex plate 313.

[0042] The anti-loosening component 4 includes a first baffle plate 41 rotatably connected to the lower surface of the through-tube of the feeding rack 29, a torsion spring is sleeved at the rotational connection between the first baffle plate 41 and the through-tube, a first arc-shaped plate 42 is fixedly connected to the side of the upper surface of the second disc 28 close to the circular hole, a support plate 43 is fixedly connected to the outer wall of the through-tube of the feeding rack 29, a first cross plate 44 is rotatably connected to the side of the lower surface of the support plate 43 away from the through-tube, a second spring 45 is sleeved at the rotational connection between the first cross plate 44 and the support plate 43, a second arc-shaped plate 46 is rotatably connected to the side of the first cross plate 44 close to the pressure welding machine 13, a second cross plate 47 is slidably connected to the side of the first cross plate 44 away from the pressure welding machine 13, a third spring 48 is fixedly connected between the opposite surfaces of the second cross plate 47 and the first cross plate 44, and a stopper 49 is fixedly connected to the upper surface of the second disc 28.

[0043] The automatic unloading assembly 5 includes a rotating plate 51 rotatably connected to the upper surface of the base plate 11, a second baffle 52 is fixedly connected to the top of the rotating plate 51, a U-shaped plate 53 is fixedly connected to the side of the second baffle 52 close to the lifting platform 12, a collecting box 54 is fixedly connected to the upper surface of the base plate 11, and a corner plate 55 is fixedly connected to the side of the collecting box 54 close to the second baffle 52.

[0044] A motor is provided inside the lifting platform 12 to adjust the pressure welding machine 13 up and down, a motor is provided inside the rotating shaft 38 to drive the conveyor belt 39 to transport the lithium battery cells 14, and a motor is provided inside the limit box 311 to drive the second push plate 312 to slide back and forth inside the limit box 311, and the spacing between the symmetrical convex plates 313 is equal to the width of the conveyor belt 39.

[0045] The main drive rotary disc 21 and the driven rotary disc 26 have the same diameter, and the transmission ratio between the main drive rotary disc 21 and the third disc 31 through the transmission belt 32 is 1:4.

[0046] A side of the second transverse plate 47 away from the first transverse plate 44 is configured as an inclined surface, and a side of the stopper 49 close to the second transverse plate 47 is configured as an inclined surface.

[0047] The side of the second baffle plate 52 close to the first circular plate 23 is located above the first circular plate 23 . The closed space formed by the U-shaped plate 53 and the second baffle plate 52 is equal to the diameter of the lithium battery core 14 . A torsion spring is fixedly connected between the rotating plate 51 and the bottom plate 11 .

[0048] The above implementation works as follows:

[0049] The initialization steps are as follows:

[0050] The staff stacks a plurality of caps and puts them into the through pipe of the feeding rack 29, and then starts the equipment to make the main drive turntable 21 start to rotate.

[0051] The working steps are as follows:

[0052] The anti-blocking component 3 is used to prevent the lithium battery cell 14 from being blocked during the feeding process:

[0053] like Figure 5 and Figure 6As shown, the conveying device in the previous process conveys the lithium battery cell 14 to the inside of the U-shaped clamp 310, and the rotating conveyor belt 39 drives the lithium battery cell 14 to continuously move to the side close to the limit box 311 through the U-shaped clamp 310. When the U-shaped clamp 310 loaded with the lithium battery cell 14 moves horizontally to the position of the rotating shaft 38, the bending and turning of the conveyor belt 39 will drive the U-shaped clamp 310 to turn downward together. The spacing between the convex plates 313 is equal to the width of the conveyor belt 39. During the downward turning of the U-shaped clamp 310, the convex plates 313 are The U-shaped clip 310 will not be blocked, but the lithium battery cell 14 loaded in the U-shaped clip 310 is blocked by the convex plate 313 and pushed to one side of the limit box 311 when the U-shaped clip 310 is turned over, so that the lithium battery cell 14 slides into the inside of the limit box 311 through the upper surface of the convex plate 313. At this time, the second push plate 312 that reciprocates inside the limit box 311 will push the lithium battery cell 14 inside the limit box 311 to move downward, so as to prevent the lithium battery cell 14 from tilting inside the limit box 311 and being unable to slide down.

[0054] The second push plate 312 slides back and forth inside the limit box 311, so that the lithium battery cell 14 that slides into the limit box 311 can be quickly pushed into the first circular plate 23 by the first push plate 37. During the pushing process, the lithium battery cell 14 is fitted with the surface of the second push plate 312 to restrict the posture of the lithium battery cell 14 inside the limit box 311, thereby preventing the lithium battery cell 14 from being blocked inside the limit box 311 due to skew after falling into the limit box 311. The conveyor belt 39 places the lithium battery cells 14 into the feeding box 36 one by one through the U-shaped clip 310 on its surface, thereby preventing the lithium battery cells 14 from colliding with each other during delivery and causing damage, thereby ensuring that the lithium battery pressure welding process is smoother while ensuring the stability of the lithium battery during transmission.

[0055] The cap and the lithium battery cell 14 are placed in a concentric state during welding by vertically pressing the welding assembly 2:

[0056] like Figures 1 to 6 As shown, after the lithium battery cell 14 slides into the feeding box 36 through the limit box 311, the rotating main drive turntable 21 drives the third disc 31 to rotate together through the transmission belt 32. When the third disc 31 rotates, it drives the first push plate 37 to slide back and forth inside the feeding box 36 through the straight groove plate 33 and the slide rod 34. The lithium battery cell 14 that falls into the feeding box 36 is pushed into the first disc 23 under the pushing action of the reciprocating sliding of the first push plate 37.

[0057] When the lithium battery cell 14 is pushed into the first circular plate 23, the lithium battery cell 14 moves between the symmetrical clamping plates 216, which will cause relative pushing of the two clamping plates 216, so that the distance between the two clamping plates 216 increases. When the clamping plates 216 move, the limiting slide plate 213 will slide together in the slide groove of the first circular plate 23, and the first spring 215 will be elastically contracted by the sliding of the limiting slide plate 213. In the process of the limiting slide plate 213 sliding in the slide groove, the end sides of the first bracket 211 and the second bracket 212 are slidably connected to the straight slot 21 4, the first bracket 211 and the second bracket 212 are affected by the movement of the straight slot 214 and slide inside the straight slot 214. At the same time, because the central axes of the first bracket 211, the second bracket 212 and the carrier 210 are in a collinear line, the symmetrical clamping plates 216 slide the same distance inside the sliding groove of the first circular plate 23, so that the central axis of the lithium battery cell 14 between the clamping plates 216 remains vertically collinear with the central axis of the carrier 210, ensuring that the lithium battery cell 14 will not be eccentric with the carrier 210 due to the shaking of the clamping plates 216 during the movement;

[0058] When the main drive turntable 21 rotates, it will drive the driven turntable 26 that is meshed with it to rotate together. Because the diameters of the main drive turntable 21 and the driven turntable 26 are equal, the angular speeds of the main drive turntable 21 and the driven turntable 26 when they rotate are equal. When the driven turntable 26 rotates, it drives the second disk 28 to rotate together through the second cylinder 27. During the rotation process, the second disk 28 drives the cap in the circular hole to rotate together. The cap cannot fall off due to the isolation of the rubber plate inside the circular hole. When the cap rotates to the tangent position between the first disk 25 and the second disk 28, the first circular plate 23 rotates and drives the lithium battery cell 14 to rotate together to the tangent position between the first disk 25 and the second disk 28. At this time, the lithium battery cell 14 and the cap are in a vertical state. At this time, the lifting platform 12 drives the pressure welder 13 to move downward and weld the cap and the lithium battery cell 14. After welding is completed, the pressure welder 13 slides upward inside the lifting platform 12 to the initial position.

[0059] By the synchronous rotation of the main drive turntable 21 and the driven turntable 26, the symmetrical clamping plates 216 limit the sliding of the lithium battery cells 14, so that when the lithium battery cells 14 loaded on the first circular plate 23 and the caps loaded on the second circular plate 28 rotate to the bottom of the pressure welder 13, the lithium battery cells 14 and the caps are in a vertical and coaxial state, so that the point that the pressure welder 13 can weld during the downward pressure welding process is at the center of the cap and the lithium battery cells 14, avoiding stress during the welding process caused by the misalignment of the cap and the lithium battery cells 14. The force distribution is uneven, and the quality of the welding points cannot be guaranteed, which reduces the occurrence of problems such as welding point cracks, cold welding or welding point adhesion, improves the stability of the lithium battery cell 14 after welding and the quality of the battery, and the lithium battery cell 14 and the cap axis are in line, which makes the lithium battery cell 14 easy to package, avoiding the problem of gaps between the cap and the outer layer of the package when the outer ring of the lithium battery cell 14 is sealed and wrapped due to the eccentricity of the cap, reduces the internal electrolyte leakage and gas intrusion of the lithium battery cell 14, and improves the safety and service life of the battery.

[0060] The cap is fixed during welding and pressing by anti-loosening component 4:

[0061] like Figure 7 and Figure 8 As shown, during the rotation of the second disc 28, the first arc plate 42 at the edge of the circular hole of the second disc 28 will push the cap at the bottom of the through pipe of the feeding rack 29, so that the cap in the through pipe pushes the first baffle plate 41 to flip open and slide out of the interior of the through pipe under the pushing action of the first arc plate 42. The cap that slides out of the through pipe rotates together with the second disc 28 under the joint limiting action of the rubber plate in the circular hole and the first arc plate 42. During the rotation process, the second disc 28 will drive the stopper 49 to rotate together. When the circular hole rotates to the bottom of the pressure welding machine 13, the stopper 49 will squeeze the second cross plate 47 to make the second arc plate 46 at one end of the first cross plate 44 close to the pressure welding machine 13 move in the direction close to the pressure welding machine 13. After moving, the second arc plate 46 will clamp and fix the cap through the joint action of the first arc plate 42 to prevent the cap from shaking and dislocating due to the contact with the pressure welding machine 13.

[0062] When the second disc 28 rotates, the second arc plate 46 and the first arc plate 42 clamp the cap, so that the cap is in a state of being coaxial with the lithium battery cell 14 after moving to just below the pressure welding machine 13, so as to avoid the cap being offset due to the centrifugal force during rotation of the cap on the second disc 28, thereby ensuring the neatness and stability of the welding between the lithium battery cell 14 and the cap. At the same time, the second arc plate 46 and the first arc plate 42 clamp the cap, so as to avoid the pressure welding machine 13 sticking to the cap during pressure welding, and the cap being driven to move together with the welder after the welder moves, resulting in the problem of the cap and the lithium battery cell 14 being welded and separated, thereby improving the efficiency of welding the lithium battery cell 14 and the cap.

[0063] The lithium battery cells 14 after welding and pressing are stacked by the automatic unloading assembly 5:

[0064] like Fig. 9 As shown, when the pressure-welded lithium battery cell 14 rotates to the position of the second baffle plate 52 inside the first circular plate 23, the second baffle plate 52 will cause the lithium battery cell 14 to squeeze the second baffle plate 52. The squeezed second baffle plate 52 will rotate above the bottom plate 11, and the torsion spring between the rotating plate 51 and the bottom plate 11 will twist and generate torque. When the second baffle plate 52 rotates until its outer wall fits the angle plate 55, the second baffle plate 52 can no longer rotate. At this time, the lithium battery cell 14 is fixed by the second baffle plate 52. The baffle plate 52 is squeezed and slides out of the first circular plate 23. When the lithium battery cell 14 is free from the limit of the clamping plate 216, the lithium battery cell 14 will fall downward between the U-shaped plate 53 and the second baffle plate 52. At the same time, the twisted torsion spring is released, so that the rotating plate 51 and the second baffle plate 52 are rotated quickly as a whole toward the side close to the collection box 54. The rotation of the second baffle plate 52 pushes the lithium battery cell 14 to move toward the inside of the collection box 54, thereby ensuring that the lithium battery cell 14 will not accumulate inside the equipment after the welding and pressing is completed.

[0065] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0066] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lithium battery cap press welding machine, comprising a base plate (11), a lifting platform (12), a press welding machine (13) and a lithium battery cell (14), characterized in that: The lifting platform (12) is fixedly connected to the upper surface of the bottom plate (11); the pressure welding machine (13) is slidably connected to the inside of the pressure welding machine (13); a lithium battery cell (14) is arranged above the bottom plate (11); a vertical pressure welding assembly (2) is arranged above the bottom plate (11) for keeping the cap and the lithium battery cell (14) vertical when welding; a loading anti-blocking assembly (3) is arranged above the bottom plate (11) for preventing the lithium battery cell (14) from getting stuck when loading; an anti-loosening assembly (4) is arranged above the bottom plate (11) for preventing the lithium battery cell (14) from shaking when welding the cap; and an automatic unloading assembly (5) is arranged above the bottom plate (11) for facilitating continuous unloading; The vertical pressure welding assembly (2) comprises a main drive rotating disk (21) rotatably connected to the upper surface of the base plate (11); the outer wall of the main drive rotating disk (21) is fixedly connected to a gear ring (22) distributed in an annular array; the upper surface of the main drive rotating disk (21) is fixedly connected to a first circular plate (23); the middle of the upper surface of the first circular plate (23) is fixedly connected to a first cylinder (24); the upper surface of the first cylinder (24) is fixedly connected to a first disk (25); the upper surface of the base plate (11) is rotatably connected to a driven rotating disk (26) ), the main drive rotary disc (21) and the driven rotary disc (26) are meshed with each other, a second cylinder (27) is fixedly connected to the middle of the upper surface of the driven rotary disc (26), a second disc (28) is fixedly connected to the upper surface of the second cylinder (27), the upper surface of the second disc (28) is provided with circular holes, the inside of the circular holes is fixedly connected to a limiting rubber plate distributed in an annular array, the upper surface of the bottom plate (11) is fixedly connected to a feeding rack (29), and the feeding rack (29) is provided with a through pipe on one side above the second disc (28); The feeding anti-blocking assembly (3) comprises a third disc (31) rotatably connected to the upper surface of the base plate (11); a transmission belt (32) is transmission-connected between the third disc (31) and the main drive rotary disc (21); a straight groove plate (33) is eccentrically rotationally connected to the upper surface of the third disc (31); a slide bar (34) is slidably connected inside the straight groove plate (33); a stand (35) is fixedly connected to the upper surface of the base plate (11); a feeding box (36) is fixedly connected to the side of the stand (35) close to the third disc (31); a first push plate (36) is slidably connected inside the feeding box (36). 37), the lower surface of the first push plate (37) is fixedly connected to the upper surface of the slide bar (34), the first push plate (37) is internally rotatably connected to a rotating shaft (38), the outer wall of the rotating shaft (38) is transmission-connected to a conveyor belt (39), the outer wall of the conveyor belt (39) is fixedly connected to a U-shaped clamp (310), the side of the feed box (36) close to the stand (35) is fixedly connected to a limit box (311), the inner wall of the limit box (311) is slidably connected to a second push plate (312), and the side of the limit box (311) close to the rotating shaft (38) is symmetrically fixedly connected to a convex plate (313); The anti-loosening assembly (4) comprises a first baffle (41) rotatably connected to the lower surface of the through-tube of the feeding rack (29); a torsion spring is sleeved at the rotatable connection between the first baffle (41) and the through-tube; a first arc-shaped plate (42) is fixedly connected to the side of the upper surface of the second disc (28) close to the circular hole; a support plate (43) is fixedly connected to the outer wall of the through-tube of the feeding rack (29); a first horizontal plate (44) is rotatably connected to the lower surface of the support plate (43) away from the through-tube; the first horizontal plate A second spring (45) is sleeved at the rotatable connection between the first horizontal plate (44) and the support plate (43); a second arc-shaped plate (46) is rotatably connected to a side of the first horizontal plate (44) close to the pressure welding machine (13); a second horizontal plate (47) is slidably connected to a side of the first horizontal plate (44) away from the pressure welding machine (13); a third spring (48) is fixedly connected between opposite surfaces of the second horizontal plate (47) and the first horizontal plate (44); and a stopper (49) is fixedly connected to the upper surface of the second disc (28); The automatic unloading assembly (5) comprises a rotating plate (51) rotatably connected to the upper surface of the bottom plate (11); a second baffle (52) is fixedly connected to the top of the rotating plate (51); a U-shaped plate (53) is fixedly connected to the side of the second baffle (52) close to the lifting platform (12); a collection box (54) is fixedly connected to the upper surface of the bottom plate (11); and a folded angle plate (55) is fixedly connected to the side of the collection box (54) close to the second baffle (52).

2. The lithium battery cap press welding machine according to claim 1, characterized in that: The vertical pressure welding assembly (2) further comprises a carrier plate (210) which is rotatably connected to the upper surface of the first circular plate (23) in an annular array arrangement, the upper surface of the first circular plate (23) is provided with slide grooves in an annular array arrangement, the carrier plate (210) is rotatably connected to the middle of the slide groove, the interior of the slide groove of the first circular plate (23) is symmetrically rotatably connected with a first bracket (211) and a second bracket (212) with the carrier plate (210) as the center, the lower surfaces of the first bracket (211) and the second bracket (212) are both slidably connected to the interior of the slide groove, The interior of the slide groove of the first circular plate (23) is symmetrically slidably connected to a limiting slide plate (213) with the carrier plate (210) as the center; the upper surface of the limiting slide plate (213) is symmetrically provided with straight slots (214); both ends of the upper surfaces of the first bracket (211) and the second bracket (212) are slidably connected to the interior of the straight slots (214); a first spring (215) is fixedly connected between the limiting slide plate (213) and the inner wall of the first circular plate (23); and a clamping plate (216) is fixedly connected to the upper surface of the limiting slide plate (213).

3. The lithium battery cap press welding machine according to claim 1, characterized in that: A motor is provided inside the lifting platform (12) to adjust the pressure welding machine (13) up and down, a motor is provided inside the rotating shaft (38) to drive the conveyor belt (39) to convey the lithium battery cells (14), and a motor is provided inside the limit box (311) to drive the second push plate (312) to slide back and forth inside the limit box (311), and the spacing between the symmetrical convex plates (313) is equal to the width of the conveyor belt (39).

4. The lithium battery cap press welding machine according to claim 2, characterized in that: The main drive rotating disk (21) and the driven rotating disk (26) have the same diameter, and the transmission ratio between the main drive rotating disk (21) and the third disk (31) through the transmission belt (32) is 1:

4.

5. The lithium battery cap press welding machine according to claim 1, characterized in that: A side of the second transverse plate (47) away from the first transverse plate (44) is configured as an inclined surface, and a side of the stopper (49) close to the second transverse plate (47) is configured as an inclined surface.

6. The lithium battery cap press welding machine according to claim 2, characterized in that: The side of the second baffle plate (52) close to the first circular plate (23) is located above the first circular plate (23); the closed space formed by the U-shaped plate (53) and the second baffle plate (52) is equal to the diameter of the lithium battery cell (14); and a torsion spring is fixedly connected between the rotating plate (51) and the bottom plate (11).

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