Cylindrical battery welding equipment and welding method

Abstract

The present invention relates to the technical field of battery processing, and discloses a cylindrical battery welding device and a welding method. The cylindrical battery welding device includes: a rotating assembly having a longitudinal central axis and adapted to rotate around the longitudinal central axis; a plurality of battery carriers disposed around the rotating assembly, and the rotating assembly rotates to drive the plurality of battery carriers to rotate around the longitudinal central axis; the battery carriers are used for clamping the batteries, and the axis line of the battery carriers has a return state parallel to the longitudinal central axis and an inclined state in which the top of the battery is relatively far from the longitudinal central axis compared to the bottom; a welding module adapted to weld the batteries when the battery carriers are in the inclined state. The cylindrical battery welding device provided by the present invention can make the flying welding easier when the battery carriers are in the inclined state, and at the same time cooperate with the rotation of the batteries, which can ensure that the welding track of the welding module is an arc, and the track is simple, thereby reducing the welding difficulty.

Description

Technical Field

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

[0002] A cylindrical battery includes a housing and a cover plate disposed at an opening on one side of the housing. In the related art, the welding of the housing 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 itself, 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 simultaneously fixed on a turret device and rotate around the turret device, 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 that the welding laser cannot completely weld along the circular outer edge of the cylindrical battery, and it is difficult to ensure the 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 housing of a battery. The cylindrical battery welding device includes:

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

[0007] A plurality of battery carriers are disposed around the rotating assembly, and the rotating assembly rotates to drive the plurality of battery carriers to rotate around the longitudinal central axis; the battery carriers are used for clamping the battery, and the axis line 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 farther from the longitudinal central axis than the bottom;

[0008] A welding module adapted to weld the battery when the battery carrier is in an inclined state.

[0009] Advantageous Effects: When the battery carrier is in an inclined state, that is, when the battery is in an inclined state, the battery is welded by the welding module. It can make the flying welding easier, and at the same time, cooperate with the battery to rotate itself, which can ensure that the welding track of the welding module is an arc, the track is simple, thereby reducing the welding difficulty, making it easier to ensure that the welding laser completely welds along the circular outer edge of the cylindrical battery, improving the error tolerance rate, and effectively ensuring the welding accuracy.

[0010] In a second aspect, the present invention further provides a cylindrical battery welding method using the above-mentioned cylindrical battery welding device. The cylindrical battery welding method includes:

[0011] Place the battery into the battery cup of the battery carrier, and clamp the battery with the jaw assembly;

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

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

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

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

[0016] The jaw assembly releases the clamping of the battery so as to remove the battery.

[0017] Beneficial effects: When the battery carrier 2 is in the inclined state, that is, when the battery is in the inclined state, the battery is welded by the welding module. It can make the flying welding easier to achieve. At the same time, cooperating with the rotation of the battery can ensure that the welding track of the welding module is an arc, with a simple track, thereby reducing the welding difficulty. It is easier to ensure that the welding laser completely welds along the circular outer edge of the cylindrical battery, improving the error tolerance rate and effectively ensuring the welding accuracy. By clamping the circumferential surface of the battery with the jaws and driving the battery to rotate around its own axis, when the welding module welds the battery, the laser can be fixed at a point, and only the relative movement with the laser is achieved through the rotation of the battery, completing the welding of one circle of the battery cover plate, making the welding track simpler and easier to implement, and easy to ensure the welding accuracy and quality. Description of the Drawings

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

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

[0020] Figure 2 It 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 It is a 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 Exploded schematic diagram of the battery placement platform of the present invention.

[0026] Explanation of reference numerals in the drawings:

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

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

[0029] 22. Tilt drive assembly; 221. Guide wheel; 222. Follow-up plate; 223. Rack; 224. Gear; 225. Lifting guide rail; 226. Lead screw; 227. Translational guide rail; 228. Translational slider; 229. First hinge seat;

[0030] 23. Battery placement platform; 231. Second hinge seat; 232. Induction module; 233. Claw assembly; 2331. Clamping drive part; 2332. Clamping guide rail; 2333. Clamping slider; 2334. Clamping part; 2335. Self-rotating roller shaft; 235. Battery cup; 2351. Accommodation groove; 2352. Cup locking part; 236. Mounting plate; 2361. Limit block;

[0031] 24. Fixing part; 25. Limit groove;

[0032] 3. Welding module; 4. Vision module; 5. Battery. Detailed implementation manners

[0033] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. These are only for convenience in 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 thus should not be construed as a limitation on the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, 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 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 housing and a cover plate provided at an opening on one side of the housing. In the related art, the welding of the housing and the cover plate is usually performed by vertical welding at the top of the cylindrical battery, and during the welding process, the cylindrical battery does not rotate itself, 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 moving in a 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 movement of the welding laser. This further increases the welding difficulty of the welding laser, resulting in that the welding laser cannot completely weld along the circular outer edge of the cylindrical battery, with a low error tolerance and it is difficult to ensure the welding accuracy.

[0038] The following will be combined with Figures 1 to 7 , to describe the embodiments 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 the cover plate and the housing of the battery 5. The cylindrical battery welding device includes:

[0040] A rotating assembly 1, having a longitudinal central axis and adapted to rotate 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 central axis; the battery carrier 2 is used to clamp the battery 5, and the axis line of the battery carrier 2 has a return state parallel to the longitudinal central axis and an inclined state in which the top of the battery 5 is farther from the longitudinal central axis than the bottom;

[0042] The welding module 3 is adapted to weld the battery 5 when the battery carrier 2 is in the inclined state.

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

[0044] When the rotating assembly 1 rotates around the longitudinal central axis, it will drive the plurality of battery carriers 2 to rotate around the longitudinal central axis, and drive the battery carrier 2 to lift through the trajectory change of the guide groove. The cooperation form between the guide groove and the battery carrier 2 will be described in detail below.

[0045] During the rotation of the battery carrier 2 around the longitudinal central axis, the axis line of the battery carrier 2 will be further driven to change by the tilt drive assembly 22, so that the battery carrier 2 switches between the return state and the inclined state. Since the battery carrier 2 is used to clamp the battery 5, the battery 5 is further switched between the return state and the inclined state. How the rotation of the battery carrier 2 around the longitudinal central axis drives the change of the axis line of the battery 5 will be described in detail below.

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

[0047] When the battery carrier 2 is in the inclined state, that is, when the battery 5 is in the inclined state, the battery 5 is welded by the welding module 3. It can make the flying welding easier, and at the same time cooperate with the rotation of the battery 5, which can ensure that the welding track of the welding module is an arc, the track is simple, thereby reducing the welding difficulty, making it easier to ensure that the welding laser completely welds along the circular outer edge of the cylindrical battery, improving the error tolerance rate, and effectively ensuring the welding accuracy. How the battery 5 rotates will be described in detail below.

[0048] In some embodiments, the cylindrical battery welding device further includes a vision module 4, and the vision module 4 is used to detect the appearance defects of the battery. Both the vision module 4 and the welding module 3 are disposed around the circumference of the rotating assembly 1.

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

[0050] A support frame 21;

[0051] The battery placement platform 23 is adapted to hold the battery 5;

[0052] The tilt drive assembly 22 is disposed on the support frame 21. One end of the tilt drive assembly 22 is connected to the rotation assembly 1, and the other end is connected to the battery placement platform 23. 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.

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

[0054] The battery placement platform 23 is adapted to hold the battery 5, and in this embodiment, the battery placement platform 23 is adapted to rotate relative to the support frame 21 to realize the switching of the battery 5 between a retracted state and a 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 module 3 finishes welding, it gradually switches from a tilted state to a vertical state.

[0056] In some embodiments, as shown in Figure 3 the rotation assembly 1 includes a base 11 and a turret 12 adapted to rotate relative to the base 11. A guide groove 111 is circumferentially provided on the outer peripheral surface of the base 11. The guide groove 111 sequentially forms a parallel section 1111, a rising section 1112, a welding travel section 1113, and a descending section 1114 along the outer peripheral surface of the base 11;

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

[0058] In this embodiment, the guide wheel of the battery carrier 2 cooperates with the guide groove 111 circumferentially provided on the outer peripheral surface of the base 11. When the turret 12 rotates around the longitudinal central axis, a relative displacement occurs between the guide groove 111 and the guide wheel 221, so that the guide wheel 221 travels along the parallel section 1111, the rising section 1112, the welding travel section 1113, and the descending section 1114 sequentially formed 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 move up and down in the vertical direction, thereby driving the rack 223 to move up and down 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, in combination with Figure 4 , Figure 5 shown, the tilt drive assembly 22 includes:

[0061] A guide wheel 221;

[0062] A follower plate 222, 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 moved up and down relative to the support frame 21 in the vertical direction.

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

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

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

[0066] A first hinge seat 229, threadedly engaged with the lead screw 226. The rotation of the lead screw 226 is adapted to drive the first hinge seat 229 to translate; the first hinge seat 229 is hingedly connected to the second hinge seat 231 of the battery placement platform 23.

[0067] Among them, a lifting guide rail 225 is arranged on the support frame 21. The follower plate 222 is adapted to move along the direction guided by the lifting guide rail 225. For example, the lifting guide rail 225 can be arranged in the vertical direction.

[0068] By movably arranging the rack 223 on the support frame 21 and driving the rack 223 to rise and fall through the trajectory change of the guide groove 111, thereby enabling the rack 223 to drive the gear 224 to rotate around its own axis; the lead screw 226 is coaxially arranged with the gear 224, such that the lead screw 226 is adapted to rotate around its own axis when the gear 224 rotates; and then the lead screw 226 drives the first hinge seat 229 to translate. At the same time, since the first hinge seat 229 is hingedly connected to the second hinge seat 231 of the battery placement platform 23, during the translation process of the first hinge seat 229, the battery placement platform 23 can be driven to rotate around the hinge axis, enabling the battery placement platform 23 to switch between the retracted state and the inclined state, and further driving the battery to switch between the retracted state and the inclined state.

[0069] In this embodiment, one of the first hinge seats 229 and the support frame 21 is further provided with a translational guide rail 227, and the other is further provided with a translational slider 228. Thus, when the lead screw 226 drives the first hinge seat 229 to translate, the cooperation of the translational guide rail 227 and the translational slider 228 can make the movement path of the first hinge 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 limiting block 2361, and the support frame 21 is further provided with a limiting groove 25. The limiting block 2361 is slidably arranged in the limiting groove 25. Through the guidance of the limiting groove 25, the mounting plate 236 can be rotated along a preset direction. Among them, the mounting plate 236 can serve as the mounting basis for structural components such as the battery support cup 235 and the jaw assembly 233.

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

[0072] Since the lifting 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 inclined state, that is, there is a direct relationship between the sliding distance of the rack 223 and the inclination angle of the battery 5. By limiting the relationship between the length L of the rack 223 and the included angle A between the axis line of the battery 5 in the return state and the inclined state, it is avoided that the sliding distance of the rack 223 is too long resulting in too large an inclination angle of the battery 5, and at the same time, it is avoided that the sliding distance of the rack 223 is too short resulting in insufficient inclination angle of the battery 5.

[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 precision is effectively guaranteed.

[0075] In this embodiment, the specific value of A can be 20° or 22° or 23° or 25° or 28° or 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 embodiments of the present invention adopts a partition design for each mechanism, which can make each mechanism independently controllable, easy to disassemble, easy to debug, and convenient to install auxiliary mechanisms, better ensuring consistency and simplifying the difficulty of centering adjustment.

[0078] In some embodiments, the battery placement platform 23 includes a jaw assembly 233, and the jaw assembly 233 has a fixed state for fixing the circumferential surface of the battery 5 and a rotating state for clamping the battery 5 to cause the battery 5 to rotate about its own axis.

[0079] After the battery carrier 2 drives the battery to be in an inclined state, by clamping the circumferential surface of the battery 5 through the jaw assembly 233 and driving the battery 5 to rotate about its own axis, when the welding module 3 welds the battery 5, the laser can be fixed in place, and only through the rotation of the battery 5 can the relative movement with the laser be achieved, completing the welding of one circle of the cover plate of the battery 5, making the welding track simpler and easier to implement, and it is easy to ensure the welding accuracy and quality.

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

[0081] At least two clamping portions 2334 for clamping the battery 5;

[0082] A rotating roller shaft 2335 is disposed on the inner circumferential surface of the clamping portion 2334 facing the battery 5; in the fixed state, the rotating roller shaft 2335 abuts against the battery 5; in the rotating state, the rotating roller shaft 2335 rotates about its own axis to drive the battery 5 to rotate about its own axis; the axis of the rotating roller shaft 2335 is parallel to the axis of the battery 5.

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

[0084] The inner circumferential surface of the clamping portion 2334 facing the battery 5 is provided with a rotating roller shaft 2335, and the rotating roller shaft 2335 can be driven to rotate about its own axis as needed. The number of the rotating roller shafts 2335 is multiple, and when the multiple rotating roller shafts 2335 rotate in the same direction, they can drive the battery 5 to rotate about its own axis.

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

[0086] A clamping driving portion 2331;

[0087] A clamping guide rail 2332 and a clamping slider 2333, one of which is disposed on the clamping driving portion 2331 and the other is disposed on the clamping portion 2334; the clamping driving portion 2331 is adapted to drive at least two clamping portions 2334 to approach or separate from each other in a preset direction. Thus, the clamping and loosening of the battery 5 are realized.

[0088] In some embodiments, the ratio of the rotation rate of the jaw assembly 233 driving the battery 5 to rotate about its own axis to the rotation rate of the rotation assembly 1 is P, satisfying: 1 / 18 ≤ P ≤ 1 / 6.

[0089] By reasonably setting the ratio of the rotation rate of the clamping jaw assembly 233 driving the battery 5 to rotate around its own axis to the rotation rate of the rotation assembly 1, and combining logical operations, the rotation speed of the turret 12 is made to be 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 defining 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 prevent the situation where the clamping portion 2334 cannot stably fix the battery. And by defining 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 prevent it from affecting the smooth progress of welding.

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

[0093] Only when the roughness of the inner surface of the clamping portion 2334 is sufficient can the battery be stably clamped. By defining the roughness of the inner surface of the clamping portion 2334, it is possible to avoid the shaking or loosening of the battery in the clamped state and improve 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 rotating roller shaft 2335 may be in contact with the outer surface of the battery 5.

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

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

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

[0098] A battery support cup 235, formed with a receiving groove 2351 for receiving the battery 5;

[0099] A plurality of cup locking members 2352 are disposed around the circumference of the battery cup 235; the cup locking member 2352 has a locking state in which it abuts against the battery 5, and a release state in which the locking of the battery 5 is released to facilitate the rotation of the battery 5 about its own axis under the drive of the jaw assembly 233.

[0100] In this embodiment, the cup locking member 2352 can be a roller shaft movably disposed 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. Thus, during the process of loading or unloading the battery 5 into or out of the battery cup 235, the cup locking member 2352 can rotate about its own axis to guide the process of loading or unloading the battery 5.

[0101] In some embodiments, the battery carrier 2 further includes: a sensing module 232, directly or indirectly connected to the cup locking member 2352; the sensing module 232 is adapted to drive the cup locking member 2352 to switch from the locking state to the release state when the battery 5 is installed at a preset position within the battery cup 235.

[0102] As an alternative implementation form, when the battery 5 is installed within the battery cup 235 and contacts the bottom of the battery cup 235, the sensing module 232 can be triggered to operate, indicating that the battery 5 is installed in place at this time, and correspondingly, the 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 the locking state to the release state. For example, through structures such as a dial, a wire, a spring, etc. provided inside, the cup locking member 2352 can be moved relative to the cup wall of the battery cup 235.

[0104] In some embodiments, the cup locking member 2352 is adapted to protrude from the receiving groove 2351 in the radial direction of the battery cup 235 in the locking state to abut against the battery 5; the cup locking member 2352 is also adapted to retract into the cup wall of the battery cup 235 in the radial direction of the battery cup 235 in the release state to move 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 assembly 1 includes a base 11 and a turret 12 adapted to rotate relative to the base 11; a drive motor can be provided inside the base 11, and a speed reducer and other devices can also be provided between the motor and the base 11 to ensure the stable output of the drive assembly 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 method for welding cylindrical batteries is further provided. By applying the above-mentioned cylindrical battery welding equipment, the method for welding cylindrical batteries includes:

[0109] Place the battery 5 into the battery cup 235 of the battery carrier 2, and clamp the battery 5 by the jaw assembly 233;

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

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

[0112] After welding is completed, the 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 inclined state to the retracted state, so as to drive the battery 5 to return to the vertical state;

[0114] The jaw assembly 233 releases the clamping of the battery 5 to facilitate the removal of the battery 5.

[0115] When the battery carrier 2 is in the inclined state, that is, when the battery 5 is in the inclined state, the battery is welded by the welding module 3. This can make the flying welding easier to achieve. At the same time, in cooperation with the rotation of the battery 5, it can ensure that the welding track of the welding module 3 is an arc, with a simple track, thereby reducing the welding difficulty. It is easier to ensure that the welding laser completely welds along the circular outer edge of the cylindrical battery, improving the error tolerance and effectively ensuring the welding accuracy. By clamping the circumferential surface of the battery by the jaw assembly 233 and driving the battery to rotate around its own axis, when the welding module welds the battery, the laser can be fixed at a point, and only through the rotation of the battery, the relative movement with the laser is realized, and the welding of one circle of the battery cover plate is completed, making the welding track simpler and easier to implement, and it is easy to ensure the welding accuracy and quality.

[0116] Obviously, the above embodiments are only examples clearly described and not limitations on the implementation manners. Although the embodiments of the present invention are described in conjunction with the drawings, those skilled in the art can 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, For welding the cover plate and the housing of the battery (5), the cylindrical battery welding equipment includes: A rotating assembly (1) having a longitudinal central axis and adapted to rotate about the longitudinal central axis; A plurality of battery carriers (2) 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 central axis; the battery carrier (2) is used for clamping the battery (5), and the axis line of the battery carrier (2) has a retracted state parallel to the longitudinal central axis and an inclined state in which the top of the battery (5) is relatively far from the longitudinal central axis compared to the bottom; A welding module (3) adapted to weld the battery (5) when the battery carrier (2) is in the inclined state; The battery carrier (2) includes: A support frame (21); A battery placement platform (23) adapted to clamp the battery (5); An inclination drive assembly (22) disposed on the support frame (21), one end of the inclination drive assembly (22) is connected to the rotating assembly (1), and the other end is connected to the battery placement platform (23), and the inclination drive assembly (22) is adapted to drive the battery placement platform (23) to switch between the retracted state and the inclined state when moving to a preset position following the rotating assembly (1); The rotating assembly (1) includes a base (11) and a turret (12) adapted to rotate relative to the base (11). A guide groove (111) is formed around the outer peripheral surface of the base (11), and the guide groove (111) sequentially forms a parallel section (1111), a rising section (1112), a welding stroke section (1113), and a descending section (1114) along the outer peripheral surface of the base (11).

2. The cylindrical battery welding device according to claim 1, wherein The battery carrier (2) further includes a guide wheel (221), and the guide wheel (221) is movably disposed in the guide groove (111); when the guide wheel (221) passes through the rising section (1112) or the descending section (1114), the guide wheel (221) is adapted to rise or fall relative to the base (11).

3. The cylindrical battery welding device according to claim 2, wherein, The inclination drive assembly (22) includes: The guide wheel (221); A follower plate (222) connected to the guide wheel (221), and 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) disposed on the follower plate (222); A gear (224) meshed with the rack (223), and the rack (223) slides to drive the gear (224) to rotate; A lead screw (226) coaxially disposed with the gear (224), and the lead screw (226) is adapted to rotate about its own axis when the gear (224) rotates; The first hinge seat (229) is in threaded cooperation with the lead screw (226), and the rotation of the lead screw (226) is adapted to drive the first hinge seat (229) to translate; the first hinge seat (229) is hingedly connected to the second hinge seat (231) of the battery placement platform (23).

4. The cylindrical battery welding device according to claim 3, characterized in that, The length of the rack (223) is L, and the included angle between the axis line of the battery (5) between the return state and the inclined state is A, satisfying: 1 / 18 mm / ° ≤ L / A ≤ 1 / 6 mm / °.

5. The cylindrical battery welding device according to claim 4, characterized in that, The value range of A is: 20° ≤ A ≤ 90°.

6. The cylindrical battery welding device according to claim 1, characterized in that, The battery placement platform (23) is detachably connected to the tilt drive assembly (22) and the support frame (21).

7. The cylindrical battery welding device according to claim 1, wherein The battery placement platform (23) includes a jaw assembly (233), and the jaw assembly (233) has a fixed state of fixing the circumferential surface of the battery (5) and a self-rotation state of clamping the battery (5) to cause the battery (5) to rotate about its own axis.

8. The cylindrical battery welding device according to claim 7, wherein, The jaw assembly (233) includes: At least two clamping parts (2334) for clamping the battery (5); A self-rotation roller shaft (2335) is arranged on the inner circumferential surface of the clamping part (2334) facing the battery (5); in the fixed state, the self-rotation roller shaft (2335) abuts against the battery (5); in the self-rotation state, the self-rotation roller shaft (2335) rotates around its own axis to drive the battery (5) to rotate around its own axis; the axis of the self-rotation roller shaft (2335) is parallel to the axis of the battery (5).

9. The cylindrical battery welding device according to claim 8, wherein, The jaw assembly (233) further includes: A clamping drive part (2331); A clamping guide rail (2332) and a clamping slider (2333), one of which is arranged on the clamping drive part (2331) and the other is arranged on the clamping part (2334); the clamping drive part (2331) is adapted to drive at least two of the clamping parts (2334) to approach or separate from each other in a preset direction.

10. The cylindrical battery welding device according to claim 7 or 8, characterized in that, The ratio of the rotation rate of the jaw assembly (233) driving the battery (5) to rotate around its own axis to the rotation rate of the rotation assembly (1) is P, satisfying: 1 / 18 ≤ P ≤ 1 / 6.

11. The cylindrical battery welding device according to claim 8, characterized in that, Along the axis direction of the battery (5), the ratio of the height of the clamping part (2334) to the height of the battery (5) is W, satisfying: 1 / 10 ≤ W ≤ 1 / 3.

12. The cylindrical battery welding device according to claim 8, wherein, The roughness R of the inner surface of the clamping part (2334) has a value range of 0.8 μm ≤ R ≤ 1.6 μm.

13. The cylindrical battery welding device according to claim 7 or 8, characterized in that The battery placement platform (23) is detachably connected to the jaw assembly (233).

14. The cylindrical battery welding device according to claim 7, wherein, The battery carrier (2) further includes: A battery cup (235) formed with a receiving groove (2351) for receiving the battery (5); A plurality of cup locking members (2352) are disposed around the circumference of the battery cup (235); the cup locking member (2352) has a locking state in which it abuts against the battery (5), and a release state in which the locking of the battery (5) is released to facilitate the rotation of the battery (5) about its own axis under the drive of the jaw assembly (233).

15. The cylindrical battery welding device according to claim 14, characterized in that, The battery carrier (2) further includes: an induction module (232) directly or indirectly connected to the cup locking member (2352); the induction module (232) is adapted to drive the cup locking member (2352) to switch from the locking state to the release state when the battery (5) is installed at a preset position in the battery cup (235).

16. The cylindrical battery welding device according to claim 14, characterized in that, The cup locking member (2352) is adapted to protrude from the receiving groove (2351) in the radial direction of the battery cup (235) in the locking state to abut against the battery (5); the cup locking member (2352) is further adapted to retract into the cup wall of the battery cup (235) in the radial direction of the battery cup (235) in the release state to move away from the battery (5).

17. The cylindrical battery welding device according to claim 15, wherein The induction module (232) includes a magnetic member.

18. The cylindrical battery welding device according to claim 2, 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).

19. A method for welding cylindrical batteries, characterized in that, Applying the cylindrical battery welding device according to any one of claims 1 to 18 above, the cylindrical battery welding device includes a battery cup (235); the battery placement platform (23) includes a jaw assembly (233); the cylindrical battery welding method includes: Placing the battery (5) into the battery cup (235) of the battery carrier (2), and clamping the battery (5) by the jaw assembly (233); The rotating assembly (1) rotates and drives the battery carrier (2) to switch from the retracted state to the inclined state to drive the battery (5) to be inclined; The jaw assembly (233) drives the battery (5) to rotate about its own axis; the welding module synchronously welds the battery (5); After welding is completed, the 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 inclined state to the retracted state to drive the battery (5) to return to the vertical state; The jaw assembly (233) releases the clamping of the battery (5) to facilitate the removal of the battery (5).

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