Cylindrical battery welding equipment and welding method

Abstract

The invention relates to the technical field of battery processing, and discloses cylindrical battery welding equipment and a welding method.The cylindrical battery welding equipment comprises a rotating assembly, a welding assembly, a welding assembly and a welding assembly, and the rotating assembly is provided with a longitudinal center shaft and suitable for rotating around the longitudinal center shaft; the plurality of battery carriers are arranged around the rotating assembly, and the rotating assembly rotates to drive the plurality of battery carriers to rotate around the longitudinal central shaft; the battery carrier is used for clamping a battery, and the axis of the battery carrier has a return state parallel to the longitudinal center shaft and an inclined state enabling the top of the battery to be far away from the longitudinal center shaft relative to the bottom of the battery. And the welding module is suitable for welding the battery when the battery carrier is in the inclined state. According to the cylindrical battery welding equipment provided by the invention, when the battery carrier is in an inclined state, flying welding can be realized more easily, meanwhile, the battery is matched for autorotation, the welding track of the welding module can be ensured to be an arc line, the track is simple, and the welding difficulty is further reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of battery processing, and in particular to a cylindrical battery welding device and a welding method. Background Art

[0002] The cylindrical battery includes a shell and a cover plate disposed at an opening on one side of the shell. In the related art, the shell and the cover plate are usually welded vertically at the top of the cylindrical battery, and during the welding process, the cylindrical battery does not rotate, but the welding laser moves in a circular motion along the edge of the cover plate.

[0003] In the batch processing of cylindrical batteries, since multiple cylindrical batteries are fixed on the turret equipment at the same time and rotate around the turret equipment, and during the continuous production process, the turret is in a continuous rotation state, this further increases the welding difficulty of the welding laser, resulting in the welding laser being unable to completely weld along the circular outer edge of the cylindrical battery, making it difficult to ensure welding accuracy. Summary of the invention

[0004] In view of this, the present invention provides a cylindrical battery welding device and a welding method to solve the problem that the welding laser cannot accurately weld along the circular outer edge of the cylindrical battery.

[0005] In a first aspect, the present invention provides a cylindrical battery welding device for welding a cover plate and a shell of a battery, the cylindrical battery welding device comprising:

[0006] A rotating assembly having a longitudinal central axis and adapted to rotate about the longitudinal central axis;

[0007] A plurality of battery carriers are disposed around a rotating assembly, and the rotating assembly rotates to drive the plurality of battery carriers to rotate around a longitudinal central axis; the battery carrier is used to clamp the battery, and the axis of the battery carrier has a return state parallel to the longitudinal central axis, and an inclined state in which the top of the battery is away from the longitudinal central axis relative to the bottom;

[0008] The welding module is suitable for welding the battery when the battery carrier is in a tilted state.

[0009] Beneficial effect: When the battery carrier is in a tilted state, that is, when the battery is in a tilted state, the battery is welded through the welding module. It can make flying welding easier to achieve, and at the same time, with the battery rotating, it can ensure that the welding trajectory of the welding module is an arc, the trajectory is simple, and thus the welding difficulty is reduced. It is easier to ensure that the welding laser is completely welded along the circular outer edge of the cylindrical battery, improve the fault tolerance rate, and effectively ensure the welding accuracy.

[0010] In a second aspect, the present invention further provides a cylindrical battery welding method, using the cylindrical battery welding device as described above, the cylindrical battery welding method comprises:

[0011] Placing the battery into the battery holder of the battery carrier, and clamping the battery with the clamping claw assembly;

[0012] The rotating assembly rotates and drives the battery carrier to switch from the return state to the tilted state, so as to drive the battery to tilt;

[0013] The clamp assembly drives the battery to rotate around its own axis; the welding module welds the battery synchronously;

[0014] After welding is completed, the jaw assembly stops the battery's rotation;

[0015] The rotating assembly continues to rotate and drives the battery carrier to switch from the tilted state to the return state, so as to drive the battery to return to the vertical state;

[0016] The clamping jaw assembly releases the clamping jaws from the battery so that the battery can be removed.

[0017] Beneficial effect: When the battery carrier 2 is in a tilted state, that is, when the battery is in a tilted state, the battery is welded through the welding module. It can make flying welding easier to achieve, and at the same time, with the battery rotating, it can ensure that the welding trajectory of the welding module is an arc, and the trajectory is simple, thereby reducing the difficulty of welding, and it is easier to ensure that the welding laser is completely welded along the circular outer edge of the cylindrical battery, improve the fault tolerance, and effectively ensure the welding accuracy. The battery is clamped by the clamping jaws on the circumference, and the battery is driven to rotate around its own axis. When the welding module welds the battery, the laser can be fixed and motionless, and only the relative movement with the laser is achieved through the rotation of the battery to complete the welding of a circle of the battery cover, making the welding trajectory simpler and easier to implement, and easy to ensure welding accuracy and quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the cylindrical battery welding equipment of the present invention;

[0020] Figure 2 This is an exploded schematic diagram of the cylindrical battery welding equipment of the present invention;

[0021] Figure 3 It is a front view of the base of the present invention;

[0022] Figure 4 Schematic diagram of the battery carrier of the present invention Figure 1 ;

[0023] Figure 5 Schematic diagram of the battery carrier of the present invention Figure 2 ;

[0024] Figure 6 Schematic diagram of the battery carrier of the present invention Figure 3 ;

[0025] Figure 7 It is a schematic diagram of the exploded view of the battery placement platform of the present invention.

[0026] Description of reference numerals:

[0027] 1. Rotating assembly; 11. Base; 111. Guide groove; 1111. Parallel section; 1112. Ascending section; 1113. Welding travel section; 1114. Descending section; 12. Turret; 121. Fixed section;

[0028] 2. Battery carrier; 21. Support frame;

[0029] 22. Tilt drive assembly; 221. Guide wheel; 222. Follower plate; 223. Rack; 224. Gear; 225. Lifting guide rail; 226. Screw rod; 227. Translation guide rail; 228. Translation slider; 229. First hinge seat;

[0030] 23. Battery placement platform; 231. Second hinged seat; 232. Sensing module; 233. Clamping claw assembly; 2331. Clamping drive unit; 2332. Clamping guide rail; 2333. Clamping slider; 2334. Clamping unit; 2335. Rotating roller shaft; 235. Battery support cup; 2351. Accommodating groove; 2352. Support cup locking member; 236. Mounting plate; 2361. Limiting block;

[0031] 24. Fixing piece; 25. Limiting groove;

[0032] 3. Welding module; 4. Vision module; 5. Battery. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0037] The cylindrical battery includes a shell and a cover plate arranged at an opening on one side of the shell. In the related art, the welding of the shell and the cover plate is usually performed vertically at the top of the cylindrical battery, and during the welding process, the cylindrical battery does not rotate, but the welding laser moves in a circular motion along the edge of the cover plate. In the batch processing of cylindrical batteries, since multiple cylindrical batteries are fixed on the turret device at the same time and rotate around the turret device, and during the continuous production process, the turret is in a continuous rotation state, the moving trajectory of the welding laser needs to fit the trajectory of the circular motion along the edge of the cover plate with the trajectory of the cylindrical battery rotating around the turret, and then calculate the landing point of the continuous motion of the welding laser, which further increases the welding difficulty of the welding laser, resulting in the welding laser being unable to completely weld along the circular outer edge of the cylindrical battery, and the fault tolerance rate is low, and it is difficult to ensure the welding accuracy.

[0038] Combine the following Figures 1 to 7 , describing an embodiment of the present invention.

[0039] According to an embodiment of the present invention, on the one hand, a cylindrical battery welding device is provided for welding a cover plate and a shell of a battery 5, and the cylindrical battery welding device comprises:

[0040] The rotating assembly 1 has a longitudinal central axis and is suitable for rotating around the longitudinal central axis;

[0041] A plurality of battery carriers 2 are disposed around the rotating assembly 1, and the rotating assembly 1 rotates to drive the plurality of battery carriers 2 to rotate around the longitudinal center axis; the battery carrier 2 is used to clamp the battery 5, and the axis of the battery carrier 2 has a return state parallel to the longitudinal center axis, and a tilted state that makes the top of the battery 5 away from the longitudinal center axis relative to the bottom;

[0042] The welding module 3 is suitable for welding the battery 5 when the battery carrier 2 is in a tilted state.

[0043] Combination Figure 1 As shown, the longitudinal center axis of the rotating assembly 1 is the longitudinal center axis shown in the figure, which can be the rotation center of the rotating assembly 1. The axis line of the battery carrier 2 is the battery carrier axis line shown in the figure, which can be the rotation center of the battery 5.

[0044] When the rotating assembly 1 rotates around the longitudinal center axis, it drives the multiple battery carriers 2 to rotate around the longitudinal center axis, and the battery carriers 2 are lifted and lowered by the change of the trajectory of the guide groove. The cooperation between the guide groove and the battery carrier 2 is described in detail below.

[0045] During the process of the battery carrier 2 rotating around the longitudinal center axis, the axis of the battery carrier 2 is further driven to change through the tilt drive assembly 22, so that the battery carrier 2 switches between the return state and the tilt state. Since the battery carrier 2 is used to clamp the battery 5, the battery 5 switches between the return state and the tilt state. How the process of the battery carrier 2 rotating around the longitudinal center axis drives the axis of the battery 5 to change is described in detail below.

[0046] In this embodiment, the return state may specifically be a vertical state.

[0047] When the battery carrier 2 is in a tilted state, that is, when the battery 5 is in a tilted state, the battery 5 is welded by the welding module 3. It can make flying welding easier to achieve, and at the same time, with the battery 5 rotating, it can ensure that the welding trajectory of the welding module is an arc, the trajectory is simple, and then the welding difficulty is reduced, and it is easier to ensure that the welding laser is completely welded along the circular outer edge of the cylindrical battery, improve the fault tolerance rate, and effectively ensure the welding accuracy. How the battery 5 rotates is described in detail below.

[0048] In some embodiments, the cylindrical battery welding device further includes a visual module 4, which is used to detect appearance defects of the battery. The visual module 4 and the welding module 3 are both arranged around the circumference of the rotating component 1.

[0049] In some embodiments, the battery carrier 2 includes:

[0050] Support frame 21;

[0051] A battery placement platform 23, suitable for clamping the battery 5;

[0052] The tilt drive assembly 22 is arranged on the support frame 21. One end of the tilt drive assembly 22 is connected to the rotating assembly 1, and the other end is connected to the battery placement platform 23. The tilt drive assembly 22 is suitable for driving the battery placement platform 23 to switch between a vertical state and a tilted state when following the rotating assembly 1 to move to a preset position.

[0053] The support frame 21 serves as a bearing unit for each component. The support frame 21 is connected to the rotating assembly 1 through a fixing member 24 , so that the support frame 21 can always rotate with the rotating assembly 1 .

[0054] The battery placement platform 23 is suitable for clamping the battery 5 , and in this embodiment, the battery placement platform 23 is suitable for rotating relative to the support frame 21 to achieve switching of the battery 5 between the return state and the tilted state.

[0055] The tilt drive assembly 22 is adapted to drive the battery placement platform 23 to switch between a vertical state and a tilted state when following the rotation assembly 1 to move to a preset position. In this embodiment, the preset position may be relatively below the welding module 3, that is, the battery 5 rotates with the rotation assembly 1 and gradually switches from a vertical state to a tilted state when approaching the welding module 3; during the welding process of the welding module 3, the battery 5 is always in a tilted state; and after the welding of the welding module 3 is completed, it gradually switches from a tilted state to a vertical state.

[0056] In some embodiments, in combination Figure 3 As shown, the rotating assembly 1 includes a base 11 and a turret 12 suitable for rotating relative to the base 11. The outer circumference of the base 11 is surrounded by a guide groove 111. The guide groove 111 is sequentially formed with a parallel section 1111, an ascending section 1112, a welding stroke section 1113, and a descending section 1114 along the outer circumference of the base 11.

[0057] The battery carrier 2 further includes a guide wheel 221 , which is movably disposed in the guide groove 111 . The guide wheel 221 is adapted to rise or fall relative to the base 11 when passing through the ascending section 1112 or the descending section 1114 .

[0058] In the present embodiment, the guide wheel of the battery carrier 2 cooperates with the guide groove 111 arranged around the outer peripheral surface of the base 11. When the turret 12 rotates around the longitudinal center axis, the guide groove 111 and the guide wheel 221 are relatively displaced, so that the guide wheel 221 moves along the parallel section 1111, the ascending section 1112, the welding travel section 1113, and the descending section 1114 formed in sequence by the guide groove 111.

[0059] When the guide wheel passes through the ascending section 1112 or the descending section 1114, the guide wheel 221 will rise and fall in the vertical direction, thereby driving the rack 223 to rise and fall in the vertical direction. The movement of the rack 223 will drive the gear 224 to rotate, thereby driving the battery placement platform 23 to switch between the vertical state and the inclined state.

[0060] In some embodiments, as a specific implementation form, combined with Figure 4 , Figure 5 As shown, the tilt drive assembly 22 includes:

[0061] Guide wheel 221;

[0062] The follower plate 222 is connected to the guide wheel 221. When the guide wheel 221 rises or falls relative to the base 11, the follower plate 222 is adapted to move relative to the support frame 21; for example, the follower plate 222 can be raised or lowered relative to the support frame 21 in a vertical direction;

[0063] A rack 223, disposed on the follower plate 222;

[0064] The gear 224 is meshed with the rack 223, and the rack 223 slides to drive the gear 224 to rotate;

[0065] The screw rod 226 is coaxially arranged with the gear 224, and the screw rod 226 is adapted to rotate around its own axis when the gear 224 rotates;

[0066] The first hinge seat 229 is threadedly matched with the screw rod 226 , and the screw rod 226 rotates to drive the first hinge seat 229 to move horizontally; the first hinge seat 229 is hingedly connected to the second hinge seat 231 of the battery placement platform 23 .

[0067] A lifting guide rail 225 is disposed on the support frame 21 , and the follower plate 222 is suitable for moving along the direction guided by the lifting guide rail 225 . For example, the lifting guide rail 225 can be disposed along the vertical direction.

[0068] The rack 223 is movably arranged on the support frame 21, and the rack 223 is driven to rise and fall by the change of the trajectory of the guide groove 111, so that the rack 223 drives the gear 224 to rotate around its own axis; the screw rod 226 is coaxially arranged with the gear 224, so that the screw rod 226 is suitable for rotating around its own axis when the gear 224 rotates; and then the screw rod 226 drives the first hinge seat 229 to move horizontally. At the same time, since the first hinge seat 229 is hingedly connected with the second hinge seat 231 of the battery placement platform 23, the battery placement platform 23 can be driven to rotate around the hinge axis during the translation of the first hinge seat 229, so that the battery placement platform 23 switches between the return state and the tilt state, and then drives the battery to switch between the return state and the tilt state.

[0069] In this embodiment, one of the first articulated seat 229 and the support frame 21 is further provided with a translation guide rail 227, and the other is further provided with a translation slider 228, so that when the screw rod 226 drives the first articulated seat 229 to translate, the translation guide rail 227 and the translation slider 228 can cooperate to make the moving path of the first articulated seat 229 more stable.

[0070] In this embodiment, the second hinge seat 231 is arranged on the mounting plate 236, the mounting plate 236 is further provided with a limit block 2361, the support frame 21 is further provided with a limit slot 25, the limit block 2361 is slidably arranged in the limit slot 25, and the mounting plate 236 can be rotated along a preset direction through the guidance of the limit slot 25. Among them, the mounting plate 236 can serve as an installation base for structural parts such as the battery holder 235 and the clamping claw assembly 233.

[0071] In some embodiments, the length of the rack 223 is L, and the angle between the axis of the battery 5 in the return state and the tilted state is A, satisfying: 1 / 18mm / °≤L / A≤1 / 6mm / °.

[0072] Since the lifting and lowering of the rack 223 will drive the gear 224 to rotate around the axis, and then drive the battery placement platform 23 to switch between the return state and the tilted state, that is, there is a direct relationship between the sliding distance of the rack 223 and the tilt angle of the battery 5. By limiting the relationship between the length L of the rack 223 and the angle A between the axis of the battery 5 in the return state and the tilted state, it is avoided that the rack 223 slides too long to cause the tilt angle of the battery 5 to be too large, and at the same time, it is avoided that the rack 223 slides too short to cause the tilt angle of the battery 5 to be insufficient.

[0073] In some embodiments, the value range of A is: 20°≤A≤30°.

[0074] By reasonably limiting the value range of A, the matching degree between the welding module 3 and the battery 5 is ensured, the welding difficulty is reduced, and the welding accuracy is effectively guaranteed.

[0075] In this embodiment, the value of A can specifically be 20°, 22°, 23°, 25°, 28°, 30°, etc.

[0076] In some embodiments, the battery placement platform 23 can be detachably connected to the tilt drive assembly 22 and the support frame 21 .

[0077] The cylindrical battery welding equipment provided by the embodiment of the present invention adopts a partition design for each mechanism, which can make each mechanism independently controllable, easy to disassemble and debug, and convenient to install auxiliary mechanisms, so as to better ensure consistency and simplify the difficulty of centering adjustment.

[0078] In some embodiments, the battery placement platform 23 includes a clamping jaw assembly 233 , and the clamping jaw assembly 233 has a fixed state for fixing the circumference of the battery 5 , and a rotating state for clamping the battery 5 to allow the battery 5 to rotate.

[0079] After the battery carrier 2 drives the battery to be in a tilted state, the jaw assembly 233 clamps the circumference of the battery 5 and drives the battery 5 to rotate around its own axis. Therefore, when the welding module 3 welds the battery 5, the laser can be fixed and only the relative movement with the laser is achieved through the rotation of the battery 5 to complete the welding of a circle of the cover plate of the battery 5, making the welding trajectory simpler and easier to implement, and easy to ensure the welding accuracy and quality.

[0080] In some embodiments, the jaw assembly 233 includes:

[0081] At least two clamping parts 2334, used for clamping the battery 5;

[0082] The self-rotating roller 2335 is arranged on the inner circumference of the clamping portion 2334 facing the battery 5. In a fixed state, the self-rotating roller 2335 is tightly pressed against the battery 5. In a self-rotating state, the self-rotating roller 2335 rotates around its own axis to drive the battery 5 to rotate around its own axis. The axis of the self-rotating roller 2335 is parallel to the axis of the battery 5.

[0083] In this embodiment, the clamping jaw assembly 233 may include two clamping portions 2334 disposed opposite to each other, and the two clamping portions 2334 together enclose a clamping area for clamping the battery 5 .

[0084] The inner circumference of the clamping portion 2334 facing the battery 5 is provided with a self-rotating roller 2335, which can be driven to rotate around its own axis as needed. There are multiple self-rotating rollers 2335, and when the multiple self-rotating rollers 2335 rotate in the same direction, they can drive the battery 5 to rotate around its own axis.

[0085] In some embodiments, the jaw assembly 233 further comprises:

[0086] Clamping driving part 2331;

[0087] The clamping guide rail 2332 and the clamping slider 2333 are arranged at the clamping driving part 2331 and the clamping part 2334 respectively. The clamping driving part 2331 is adapted to drive at least two clamping parts 2334 to move closer to or farther from each other along a preset direction, thereby achieving clamping and releasing of the battery 5.

[0088] In some embodiments, the ratio of the rotation rate of the battery 5 driven by the clamping jaw assembly 233 to the rotation rate of the rotating assembly 1 is P, which satisfies: 1 / 18≤P≤1 / 6.

[0089] By reasonably setting the ratio of the rotation rate of the battery 5 driven by the clamping assembly 233 to rotate around its own axis and the rotation rate of the rotating assembly 1, and combining logical operations, the rotation speed of the turret 12 is kept consistent with the rotation speed of the battery 5, thereby facilitating the welding module to weld the battery 5.

[0090] In some embodiments, along the axis direction of the battery 5 , the ratio of the height of the clamping portion 2334 to the height of the battery 5 is W, satisfying: 1 / 10≤W≤1 / 3.

[0091] The height of the clamping portion 2334 determines the size of the contact area between the clamping portion 2334 and the circumferential outer surface of the battery. By limiting the lower limit of the ratio of the height of the clamping portion 2334 to the height of the battery 5, it is possible to avoid the clamping portion 2334 being too narrow and the clamping portion 2334 being unable to stably fix the battery. And by limiting the upper limit of the ratio of the height of the clamping portion 2334 to the height of the battery, it is possible to avoid the height of the clamping portion 2334 being too high and preventing the smooth progress of welding from being affected.

[0092] In some embodiments, the roughness R of the inner surface of the clamping portion 2334 is in the range of 0.8 μm≤R≤1.6 μm.

[0093] The battery can be stably clamped only when the roughness of the inner surface of the clamping portion 2334 is sufficient. By limiting the roughness of the inner surface of the clamping portion 2334, shaking or loosening of the battery in the clamped state can be avoided, thereby improving the clamping stability of the battery.

[0094] Specifically in this embodiment, the inner surface of the clamping portion 2334 may be in contact with the outer surface of the battery 5 , or only the self-rotating roller 2335 may be in contact with the outer surface of the battery 5 .

[0095] In some embodiments, the battery placement platform 23 and the clamping jaw assembly 233 are detachably connected.

[0096] The cylindrical battery welding equipment provided by the embodiment of the present invention adopts a partition design for each mechanism, which can make each mechanism independently controllable, easy to disassemble and debug, and convenient to install auxiliary mechanisms, so as to better ensure consistency and simplify the difficulty of centering adjustment.

[0097] In some embodiments, the battery carrier 2 further includes:

[0098] The battery holder 235 is formed with a receiving groove 2351 for receiving the battery 5;

[0099] A plurality of cup locking members 2352 are arranged around the circumference of the battery cup 235 ; the cup locking members 2352 have a locked state in which they are pressed tightly against the battery 5 , and a loose state in which the battery 5 is released so that the battery 5 can rotate around its own axis driven by the clamp assembly 233 .

[0100] In this embodiment, the cup locking member 2352 can be a roller shaft movably arranged relative to the cup wall of the battery cup 235, and the axis direction of the roller shaft is perpendicular to the axis direction of the battery 5. Therefore, when the battery 5 is loaded into or removed from the battery cup 235, the cup locking member 2352 can rotate around its own axis to guide the loading or removal process of the battery 5.

[0101] In some embodiments, the battery carrier 2 further includes: a sensing module 232, which is directly or indirectly connected to the holder locking member 2352; the sensing module 232 is suitable for driving the holder locking member 2352 to switch from a locked state to a loosened state when the battery 5 is installed to a preset position in the battery holder 235.

[0102] As an optional implementation form, when the battery 5 is installed in the battery holder cup 235 and contacts the bottom of the battery holder cup 235, the sensing module 232 can be triggered to operate, indicating that the battery 5 is installed in place, and correspondingly, the clamping jaw assembly 233 can synchronously complete the clamping of the battery 5.

[0103] The operation of the sensing module 232 can drive the cup locking member 2352 to switch from a locked state to a loosened state. For example, the cup locking member 2352 can be moved relative to the cup wall of the battery cup 235 through internal structures such as a paddle, a pull wire, and a spring.

[0104] In some embodiments, the cup locking member 2352 is suitable for being protruded in the radial direction of the battery cup 235 and disposed in the accommodating groove 2351 when in a locked state to press against the battery 5; the cup locking member 2352 is also suitable for being retracted into the cup wall of the battery cup 235 along the radial direction of the battery cup 235 when in a loose state to stay away from the battery 5.

[0105] In some embodiments, the sensing module 232 includes a magnetic member.

[0106] In some embodiments, the turret 12 is provided with a fixing portion 121 , and the battery carrier 2 is provided with a fixing member 24 connected to the fixing portion 121 .

[0107] In this embodiment, the rotating component 1 includes a base 11 and a turret 12 suitable for rotating relative to the base 11; a driving motor can be arranged inside the base 11, and a reducer or other device can be arranged between the motor and the base 11 to ensure the stable output of the driving component and ensure that the turret 12 moves at a constant speed.

[0108] According to an embodiment of the present invention, on the other hand, a cylindrical battery welding method is also provided, using the cylindrical battery welding device as described above, the cylindrical battery welding method comprises:

[0109] Place the battery 5 into the battery holder 235 of the battery carrier 2, and clamp the battery 5 with the clamp assembly 233;

[0110] The rotating assembly 1 rotates and drives the battery carrier 2 to switch from the return state to the tilted state, so as to drive the battery 5 to tilt;

[0111] The clamping jaw assembly 233 drives the battery 5 to rotate around its own axis; the welding module simultaneously welds the battery 5;

[0112] After welding is completed, the clamping jaw assembly 233 stops the rotation of the battery 5;

[0113] The rotating assembly 1 continues to rotate and drives the battery carrier 2 to switch from the tilted state to the return state, so as to drive the battery 5 to return to the vertical state;

[0114] The clamping jaw assembly 233 releases the clamping of the battery 5 so as to remove the battery 5 .

[0115] When the battery carrier 2 is in a tilted state, that is, when the battery 5 is in a tilted state, the battery is welded through the welding module 3. It can make flying welding easier to achieve, and at the same time, with the rotation of the battery 5, it can ensure that the welding trajectory of the welding module 3 is an arc, and the trajectory is simple, thereby reducing the difficulty of welding, and it is easier to ensure that the welding laser is completely welded along the circular outer edge of the cylindrical battery, improve the fault tolerance rate, and effectively ensure the welding accuracy. The battery circumference is clamped by the clamping jaw assembly 233, and the battery is driven to rotate around its own axis. When the welding module welds the battery, the laser can be fixed and motionless, and only the relative movement with the laser is achieved through the rotation of the battery to complete the welding of a circle of the battery cover, making the welding trajectory simpler and easier to implement, and easy to ensure welding accuracy and quality.

[0116] Obviously, the above embodiments are only examples for clear explanation and are not intended to limit the implementation methods. Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the present invention.

Claims

1. A cylindrical battery welding device, characterized in that: Used to weld the cover plate and the shell of a battery (5), the cylindrical battery welding equipment comprises: A rotating assembly (1) having a longitudinal central axis and adapted to rotate about the longitudinal central axis; A plurality of battery carriers (2) are arranged around the rotating assembly (1), and the rotating assembly (1) rotates to drive the plurality of battery carriers (2) to rotate around the longitudinal center axis; the battery carrier (2) is used to clamp the battery (5), and the axis of the battery carrier (2) has a return state parallel to the longitudinal center axis, and an inclined state in which the top of the battery (5) is away from the longitudinal center axis relative to the bottom; The welding module (3) is suitable for welding the battery (5) when the battery carrier (2) is in a tilted state.

2. The cylindrical battery welding equipment according to claim 1, characterized in that: The battery carrier (2) comprises: Support frame (21); A battery placement platform (23) suitable for clamping the battery (5); A tilting drive assembly (22) is arranged on the support frame (21); one end of the tilting drive assembly (22) is connected to the rotating assembly (1), and the other end is connected to the battery placement platform (23); the tilting drive assembly (22) is suitable for driving the battery placement platform (23) to switch between the return state and the tilting state when following the rotating assembly (1) to move to a preset position.

3. The cylindrical battery welding equipment according to claim 2, characterized in that: The rotating assembly (1) comprises a base (11) and a turret (12) suitable for rotating relative to the base (11); a guide groove (111) is arranged around the outer circumference of the base (11); and the guide groove (111) is sequentially formed with a parallel section (1111), an ascending section (1112), a welding stroke section (1113), and a descending section (1114) along the outer circumference of the base (11); The battery carrier (2) further comprises a guide wheel (221), wherein the guide wheel (221) is movably disposed in the guide groove (111); the guide wheel (221) is adapted to rise or fall relative to the base (11) when passing through the ascending section (1112) or the descending section (1114).

4. The cylindrical battery welding equipment according to claim 3, characterized in that: The tilt drive assembly (22) comprises: The guide wheel (221); A follower plate (222) connected to the guide wheel (221), wherein when the guide wheel (221) rises or falls relative to the base (11), the follower plate (222) is adapted to move relative to the support frame (21); A rack (223) is arranged on the follower plate (222); A gear (224) meshingly connected with the rack (223), wherein the rack (223) slides to drive the gear (224) to rotate; A screw rod (226) is coaxially arranged with the gear (224), and the screw rod (226) is suitable for rotating around its own axis when the gear (224) rotates; The first hinge seat (229) is threadedly matched with the screw rod (226), and the rotation of the screw rod (226) is suitable for driving the first hinge seat (229) to move horizontally; the first hinge seat (229) is hingedly connected to the second hinge seat (231) of the battery placement platform (23).

5. The cylindrical battery welding equipment according to claim 4, characterized in that: The length of the rack (223) is L, and the angle between the axis of the battery (5) in the return state and the inclined state is A, satisfying: 1 / 18 mm / °≤L / A≤1 / 6 mm / °.

6. The cylindrical battery welding equipment according to claim 5, characterized in that: The value range of A is: 20°≤A≤90°.

7. The cylindrical battery welding equipment according to claim 2, characterized in that: The battery placement platform (23) is detachably connected to the tilt drive assembly (22) and the support frame (21).

8. The cylindrical battery welding equipment according to claim 2, characterized in that: The battery placement platform (23) comprises a clamping claw assembly (233), wherein the clamping claw assembly (233) has a fixed state for fixing the circumference of the battery (5), and a rotating state for clamping the battery (5) to allow the battery (5) to rotate.

9. The cylindrical battery welding equipment according to claim 8, characterized in that: The clamping jaw assembly (233) comprises: At least two clamping parts (2334) for clamping the battery (5); The self-rotating roller (2335) is arranged on the inner circumference of the clamping portion (2334) facing the battery (5); in the fixed state, the self-rotating roller (2335) is tightly pressed against the battery (5); in the self-rotating state, the self-rotating roller (2335) rotates around its own axis to drive the battery (5) to rotate around its own axis; the axis of the self-rotating roller (2335) is parallel to the axis of the battery (5).

10. The cylindrical battery welding equipment according to claim 9, characterized in that: The clamping jaw assembly (233) further comprises: A clamping drive unit (2331); The clamping guide rail (2332) and the clamping slider (2333) are arranged on the clamping driving part (2331) and the other is arranged on the clamping part (2334); the clamping driving part (2331) is suitable for driving at least two clamping parts (2334) to move closer to or away from each other along a preset direction.

11. The cylindrical battery welding equipment according to claim 8 or 9, characterized in that: The ratio of the rotation rate of the battery (5) driven by the clamping jaw assembly (233) to rotate around its own axis to the rotation rate of the rotating assembly (1) is P, satisfying: 1 / 18≤P≤1 / 6.

12. The cylindrical battery welding equipment according to claim 9, characterized in that: Along the axis direction of the battery (5), the ratio of the height of the clamping portion (2334) to the height of the battery (5) is W, satisfying: 1 / 10≤W≤1 / 3.

13. The cylindrical battery welding equipment according to claim 9, characterized in that: The roughness R of the inner surface of the clamping portion (2334) is in the range of 0.8 μm≤R≤1.6 μm.

14. The cylindrical battery welding equipment according to claim 8 or 9, characterized in that: The battery placement platform (23) is detachably connected to the clamping jaw assembly (233).

15. The cylindrical battery welding equipment according to claim 8, characterized in that: The battery carrier (2) further comprises: A battery support cup (235) formed with a receiving groove (2351) for receiving the battery (5); A plurality of cup locking members (2352) are arranged around the circumference of the battery cup (235); the cup locking members (2352) have a locked state in which they are pressed against the battery (5), and a loose state in which they release the lock on the battery (5) so that the battery (5) can rotate around its own axis driven by the clamping jaw assembly (233).

16. The cylindrical battery welding equipment according to claim 15, characterized in that: The battery carrier (2) further comprises: a sensing module (232) directly or indirectly connected to the holder cup locking member (2352); the sensing module (232) is adapted to drive the holder cup locking member (2352) to switch from the locking state to the loosening state when the battery (5) is installed at a preset position in the battery holder cup (235).

17. The cylindrical battery welding equipment according to claim 15, characterized in that: The cup locking member (2352) is suitable for being protruded in the radial direction of the battery cup (235) and arranged in the accommodating groove (2351) in the locked state to press against the battery (5); the cup locking member (2352) is also suitable for being retracted into the cup wall of the battery cup (235) in the radial direction of the battery cup (235) in the loose state to keep away from the battery (5).

18. The cylindrical battery welding equipment according to claim 16, characterized in that: The sensing module (232) includes a magnetic component.

19. The cylindrical battery welding equipment according to claim 3, characterized in that: The turret (12) is provided with a fixing portion (121), and the battery carrier (2) is provided with a fixing member (24) connected to the fixing portion (121).

20. A cylindrical battery welding method, characterized in that: Using the cylindrical battery welding equipment as described in any one of claims 1 to 19 above, the cylindrical battery welding method comprises: Placing the battery (5) into the battery holder (235) of the battery carrier (2), and clamping the battery (5) with the clamping jaw assembly (233); The rotating assembly (1) rotates and drives the battery carrier (2) to switch from a return state to a tilted state, thereby driving the battery (5) to tilt; The clamping jaw assembly (233) drives the battery (5) to rotate around its own axis; the welding module simultaneously welds the battery (5); After welding is completed, the clamping jaw assembly (233) stops the rotation of the battery (5); The rotating assembly (1) continues to rotate and drives the battery carrier (2) to switch from the tilted state to the return state, thereby driving the battery (5) to return to the vertical state; The clamping jaw assembly (233) releases the clamping of the battery (5) so as to remove the battery (5).

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