A positioning device for ultrasonic welding of lithium batteries

Abstract

The application discloses a positioning device for ultrasonic welding of lithium batteries, and relates to the technical field of ultrasonic welding positioning, which comprises an ultrasonic welding assembly, a storage and positioning assembly and a feeding and positioning assembly. The ultrasonic welding assembly comprises a bearing frame, an electric push rod fixed on the bearing frame and an ultrasonic welding head fixed at the output end of the electric push rod. The storage and positioning assembly is arranged on the bearing frame and comprises a stock bin fixed on the bearing frame. The stock bin is internally provided with battery tab sheets, and the top of the stock bin is provided with a conveying element. The feeding and positioning assembly comprises a feeding element fixed on the bearing frame. The battery tab sheets are positioned and clamped by the feeding element during the welding of the ultrasonic welding head, so that the welding stability is ensured. When the battery tab sheets are discharged, the battery tab sheets and the upper clamping seat are synchronously moved out by the conveying element, so that the operation personnel do not need to repeat complicated steps, the manual error rate is effectively reduced, the overall welding yield rate and the processing efficiency are ensured, and the actual use requirement is met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ultrasonic welding positioning, in particular to a positioning device for ultrasonic welding of lithium batteries. BACKGROUND

[0002] In the process of large lithium battery processing, the positive tab will be integrated into a square tab module by a pre-welding process. In order to weld the aluminum tab with the thick connecting sheet, a positioning device is used to position the two, and then an ultrasonic welding process is used for processing.

[0003] The positioning device in the prior art generally positions the tab and the connecting sheet manually by the operator, and then manually removes it after ultrasonic welding, which affects the actual welding processing efficiency, and it is difficult to conveniently perform the feeding positioning operation, the operation steps are complicated, the operation time is long, and operation errors are more likely to occur, affecting the overall welding efficiency. SUMMARY

[0004] In view of the problems existing in the prior art positioning device for ultrasonic welding of lithium batteries, the present application is proposed.

[0005] Therefore, the problem to be solved by the present application is that the positioning device in the prior art is difficult to conveniently perform the feeding positioning operation, the operation steps are complicated, the operation time is long, and operation errors are more likely to occur, affecting the overall welding efficiency.

[0006] To solve the above technical problems, the present application provides the following technical scheme: a positioning device for ultrasonic welding of lithium batteries, comprising,

[0007] An ultrasonic welding assembly, comprising a carrying frame, an electric push rod fixed on the carrying frame, and an ultrasonic welding head fixed on the output end of the electric push rod; and

[0008] A storage positioning assembly arranged on the carrying frame, comprising a storage bin fixed on the carrying frame, a battery tab placed in the storage bin, a transmission member arranged on the top of the storage bin, a positioning roller rotatably connected to the top of the storage bin, and a support member arranged in the storage bin; and

[0009] A feeding positioning assembly arranged on the carrying frame, comprising a carrying seat rotatably connected to the carrying frame, a material disc placed on the top of the carrying seat, a feeding member arranged on the top of the material disc, a lower clamp seat located in the material disc, a second spring fixed on one side of the lower clamp seat, a guide arc groove opened in the bottom of the lower clamp seat, an upper clamp seat arranged on the top of the lower clamp seat, a battery connecting sheet arranged between the lower clamp seat and the upper clamp seat, a pressing member arranged on the carrying seat, a vertical rod slidingly connected to the carrying seat, and a limit switch arranged on the bottom of the vertical rod.

[0010] As a preferred scheme of the positioning device for ultrasonic welding of lithium batteries, the transmission member comprises a hollow roller rotatably connected to the hopper, a hollow sleeve is fixed to the outer ring of the hollow roller, an air inflation pump is fixed to the hopper, and an upper guide roller and a lower guide roller are rotatably connected to the side of the hopper.

[0011] As a preferred scheme of the positioning device for ultrasonic welding of lithium batteries, the hollow roller is provided with air holes in the outer ring, which are communicated with the hollow sleeve, one end of the air inflation pump is communicated with a three-way electromagnetic valve, and the three-way electromagnetic valve is rotatably connected to the inner ring of the hollow roller through a sealing bearing.

[0012] As a preferred scheme of the positioning device for ultrasonic welding of lithium batteries, one end of the upper guide roller is fixed with an incomplete gear, a driven gear is fixed to the hollow roller and engaged with the incomplete gear, a coil spring is sleeved on the hollow roller, one end of the coil spring is fixed to the hollow roller, and the other end of the coil spring is fixed to the hopper.

[0013] As a preferred scheme of the positioning device for ultrasonic welding of lithium batteries, a receiving groove is formed in the top of the material disc and slidably connected to the lower clamp seat, the other end of the second spring is fixed in the receiving groove, a fourth spring is fixed to the top of the lower clamp seat, the other end of the fourth spring is fixed to the upper clamp seat, third positioning holes are formed in both ends of the guide arc groove, and a through hole is formed in the center of the guide arc groove.

[0014] As a preferred scheme of the positioning device for ultrasonic welding of lithium batteries, a ring groove is formed in the bottom of the material disc, and a through groove is formed in the ring groove and communicated with the receiving groove.

[0015] As a preferred scheme of the positioning device for ultrasonic welding of lithium batteries, a third spring is sleeved on the vertical rod, one end of the third spring is fixed to the bottom of the bearing seat, and the other end of the third spring is fixed to the vertical rod.

[0016] As a preferred scheme of the positioning device for ultrasonic welding of lithium batteries, an inclined groove is formed in the top of the vertical rod, and the bottom of the vertical rod is in abutment with the triggering end of the limit switch.

[0017] As a preferred scheme of the positioning device for ultrasonic welding of lithium batteries, a limit block is fixed to the top of the hopper, the support member comprises a first spring fixed to the bottom of the hopper, and a supporting plate is fixed to the top of the first spring.

[0018] As a preferred scheme of the positioning device for ultrasonic welding of lithium batteries, the top of the bearing frame is provided with a first trough which is in sliding fit with the hopper, and the bearing frame is provided with a second trough on one side, and the limit switch is embeddedly installed in the second trough.

[0019] The present application has the advantages that: through the storage positioning assembly and the feeding positioning assembly, a plurality of battery tab pieces can be stored in the hopper, a plurality of upper clamping seats are carried by the tray, the upper clamping seat is rotated to feed, the transmission member is synchronized to store energy, the side clamping positioning is performed by the feeding member during ultrasonic welding, the welding stability is ensured, and the battery tab pieces and the upper clamping seat are synchronously moved out by the transmission member during discharging, so that the repeated and complicated steps of the operator are not required, the manual error rate is effectively reduced, the overall welding yield and the processing efficiency are ensured, and the actual use requirement is met. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Figure 1 The structure diagram of the positioning device for ultrasonic welding of lithium batteries.

[0022] Figure 2 The structure diagram of the ultrasonic welding assembly of the positioning device for ultrasonic welding of lithium batteries.

[0023] Figure 3 The top view of the storage positioning assembly and the feeding positioning assembly of the positioning device for ultrasonic welding of lithium batteries.

[0024] Figure 4 Another perspective view of the storage positioning assembly of the positioning device for ultrasonic welding of lithium batteries.

[0025] Figure 5 The sectional view of the storage positioning assembly of the positioning device for ultrasonic welding of lithium batteries.

[0026] Figure 6 The structure diagram of the transmission member of the positioning device for ultrasonic welding of lithium batteries.

[0027] Figure 7 The structure diagram of the feeding positioning assembly of the positioning device for ultrasonic welding of lithium batteries. Figure 5 The enlarged view of A in the structure diagram of the feeding positioning assembly of the positioning device for ultrasonic welding of lithium batteries.

[0028] Figure 8 The structure diagram of the feeding positioning assembly of the positioning device for ultrasonic welding of lithium batteries.

[0029] Figure 9 Separation structure diagram of feeding positioning assembly of positioning device for ultrasonic welding of lithium battery.

[0030] Figure 10 Separation structure diagram of feeding positioning assembly of positioning device for ultrasonic welding of lithium battery. Figure 9 Enlarged view at B.

[0031] Figure 11 Separation structure diagram of feeding positioning assembly of positioning device for ultrasonic welding of lithium battery. Figure 9 Enlarged view at C.

[0032] Figure 12 Separation structure diagram of feeding positioning assembly of positioning device for ultrasonic welding of lithium battery.

[0033] Figure 13 Another view of separation structure diagram of feeding positioning assembly of positioning device for ultrasonic welding of lithium battery.

[0034] Figure 14 Separation structure diagram of feeding positioning assembly of positioning device for ultrasonic welding of lithium battery. Figure 13 Enlarged view at D.

[0035] In the figure: 1, ultrasonic welding assembly; 11, bearing frame; 11-1, first trough; 11-2, second trough; 12, electric push rod; 13, ultrasonic welding head; 2, storage positioning assembly; 21, storage bin; 22, battery tab; 23, transmission piece; 23-1, hollow roller; 23-11, air hole; 23-2, hollow sleeve; 23-3, air pump; 23-31, three-way electromagnetic valve; 23-4, upper guide roller; 23-5, lower guide roller; 23-6, driven gear; 23-7, incomplete gear; 23-8, coil spring; 24, positioning roller; 25, support piece; 25-1, first spring; 25-2, supporting plate; 26, limiting block; 3, feeding positioning assembly; 31, bearing seat; 32, tray; 32-1, receiving groove; 32-2, ring groove; 32-3, through groove; 33, feeding piece; 33-1, lower clamping seat; 33-11, second spring; 33-12, through hole; 33-13, guide arc groove; 33-14, third positioning hole; 33-2, upper clamping seat; 33-21, first positioning hole; 33-3, battery connecting piece; 33-4, fourth spring; 34, pressing piece; 34-1, vertical rod; 34-11, inclined groove; 34-2, third spring; 35, limiting switch. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0037] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without the specific details set forth in this description, that the present application can be practiced with other devices, and that the present application can be practiced using other technologies. Therefore, the specific details set forth in the following description should not be taken as limiting the present application.

[0038] Secondly, the "one embodiment" or "an embodiment" referred to herein means a specific feature, structure, or characteristic under discussion. The appearance of "in one embodiment" at various places in the specification does not necessarily refer to the same embodiment, nor does it necessarily refer to a single alternative embodiment. Embodiment 1

[0039] With reference to Figure 1 and Figure 2 , the first embodiment of the present application provides a positioning device for ultrasonic welding of lithium batteries, which comprises an ultrasonic welding assembly 1, a storage positioning assembly 2 and a feeding positioning assembly 3. Through the storage positioning assembly 2 and the feeding positioning assembly 3, multiple materials can be stored, and side clamping positioning can be performed during ultrasonic welding to ensure welding stability. After welding, the materials are removed, and the two materials are automatically replaced without the need for operators to repeat complex steps (loading-clamping-welding-unloading), effectively reducing the manual error rate and ensuring the overall welding yield rate and processing efficiency.

[0040] Specifically, the ultrasonic welding assembly 1 comprises a bearing frame 11, and a motorized push rod 12 is fixed on the bearing frame 11. An ultrasonic welding head 13 is fixed at the output end of the motorized push rod 12.

[0041] The bearing frame 11 comprises a base and a rack fixed on the top of the base. The motorized push rod 12 is bolted to the rack, and the working principle and operation method of the ultrasonic welding head 13 are known to those skilled in the art and are not described here.

[0042] Specifically, the storage positioning assembly 2 is arranged on the bearing frame 11 and comprises a storage bin 21 fixed on the bearing frame 11. Battery tab sheets 22 are placed in the storage bin 21. A transmission member 23 is arranged on the top of the storage bin 21. A positioning roller 24 is rotatably connected to the top of the storage bin 21. A support member 25 is arranged in the storage bin 21.

[0043] The number of battery tab sheets 22 is several, and they are stacked in the storage bin 21. Through the arrangement of the transmission member 23, it can be in contact with the uppermost battery tab sheet 22 in the inflated state to drive the displacement of the uppermost battery tab sheet 22. In the deflated state, the transmission member 23 is not in contact with the uppermost battery tab sheet 22, and the action of the transmission member 23 does not affect the position of the battery tab sheet 22.

[0044] Through the arrangement of the support 25, the battery tab 22 can be provided with upward supporting force to ensure that the upper battery tab 22 is moved out and the lower battery tab 22 is automatically replaced upward.

[0045] Specifically, the feeding positioning assembly 3 is arranged on the bearing frame 11 and includes a bearing seat 31 rotatably connected to the bearing frame 11. A feeding tray 32 is arranged on the top of the bearing seat 31. An upper feeding piece 33 is arranged on the top of the feeding tray 32. The upper feeding piece 33 includes a lower clamping seat 33-1 arranged in the feeding tray 32. A second spring 33-11 is fixed to one side of the lower clamping seat 33-1. A guide arc groove 33-13 is arranged on the bottom of the lower clamping seat 33-1. An upper clamping seat 33-2 is arranged on the top of the lower clamping seat 33-1. A battery connecting piece 33-3 is arranged between the lower clamping seat 33-1 and the upper clamping seat 33-2. A pressing piece 34 is arranged on the bearing seat 31 and includes a vertical rod 34-1 slidably connected to the bearing seat 31. A limit switch 35 is arranged on the bottom of the vertical rod 34-1.

[0046] The bearing seat 31 is fixed to the bearing frame 11. Through the arrangement of the upper feeding piece 33, the battery connecting piece 33-3 can be positioned and clamped by the lower clamping seat 33-1 and the upper clamping seat 33-2 in the closed state to ensure the stable transfer of the battery connecting piece 33-3. In the open state, the battery connecting piece 33-3 can be displaced flexibly and separated. Embodiment 2

[0047] Reference Figures 2 to 14 This embodiment is based on the previous embodiment.

[0048] Specifically, the transmission piece 23 includes a hollow roller 23-1 rotatably connected to the hopper 21. A hollow sleeve 23-2 is fixed to the outer ring of the hollow roller 23-1. An air pump 23-3 is fixed to the hopper 21. An upper guide roller 23-4 and a lower guide roller 23-5 are rotatably connected to the hopper 21.

[0049] The distance between the upper guide roller 23-4 and the lower guide roller 23-5 is matched with the battery connecting piece 33-3. That is, when the battery connecting piece 33-3 is displaced between the upper guide roller 23-4 and the lower guide roller 23-5, the upper guide roller 23-4 and the lower guide roller 23-5 will be rotated synchronously, which can effectively improve the transmission stability of the battery connecting piece 33-3.

[0050] Ventilation holes 23-11 are arranged on the outer ring of the hollow roller 23-1 and are in communication with the hollow sleeve 23-2. A three-way electromagnetic valve 23-31 is in communication with one end of the air pump 23-3. The three-way electromagnetic valve 23-31 is rotatably connected to the inner ring of the hollow roller 23-1 through a sealing bearing.

[0051] The hollow sleeve 23-2 is in a plurality and arranged in a circular array on the hollow roller 23-1, and the air vent hole 23-11 is located inside the hollow sleeve 23-2, which is used to communicate the hollow roller 23-1 with the hollow sleeve 23-2, and then when the hollow roller 23-1 is inflated / deflated by the air pump 23-3, the hollow sleeve 23-2 will expand or shrink.

[0052] The material of the hollow sleeve 23-2 is neoprene, which has the advantages of high slip resistance, excellent weather resistance, balanced elasticity and strength, good tensile properties and tear resistance, and can withstand repeated inflation / deflation. When it expands, its outside surface is in slip-resistant contact with the surface of the battery tab 22, and when the hollow sleeve 23-2 rotates, it will displace the battery tab 22.

[0053] One end of the upper guide roller 23-4 is fixed with an incomplete gear 23-7, and the hollow roller 23-1 is fixed with a driven gear 23-6, which is engaged with the incomplete gear 23-7. The hollow roller 23-1 is sleeved with a coil spring 23-8, one end of which is fixed to the hollow roller 23-1, and the other end is fixed to the hopper 21.

[0054] The size of the incomplete gear 23-7 is larger than that of the driven gear 23-6, so that the rotation of the upper guide roller 23-4 will accelerate the rotation of the hollow roller 23-1. Through the setting of the driven gear 23-6 and the incomplete gear 23-7, when they are engaged, the rotation of the incomplete gear 23-7 will drive the driven gear 23-6 to rotate synchronously, and the coil spring 23-8 will store energy. When the driven gear 23-6 and the incomplete gear 23-7 are no longer engaged, the rotation between them does not affect each other.

[0055] The top of the tray 32 is provided with a receiving groove 32-1, which is in sliding cooperation with the lower clamp seat 33-1. The other end of the second spring 33-11 is fixed in the receiving groove 32-1. The top of the lower clamp seat 33-1 is fixed with a fourth spring 33-4, and the other end of the fourth spring 33-4 is fixed to the upper clamp seat 33-2. The two ends of the guide arc groove 33-13 are provided with third positioning holes 33-14, and the center of the guide arc groove 33-13 is provided with a through hole 33-12.

[0056] Through the setting of the second spring 33-11, the lower clamp seat 33-1 can provide elastic connection force. Without external force, the lower clamp seat 33-1 is prevented from moving randomly, and the battery connecting piece 33-3 is kept in the receiving groove 32-1. This state is called "storage state".

[0057] Through the setting of the fourth spring 33-4, the lower clamp seat 33-1 and the upper clamp seat 33-2 are elastically connected, which can provide good positioning and clamping force for the light battery connecting piece 33-3. This state is called "positioning state".

[0058] The through hole 33-12 can provide a through space for the vertical rod 34-1, so that the vertical rod 34-1 passes through the through hole 33-12 and contacts the first positioning hole 33-21, and presses the upper clamp seat 33-2 to move a distance.

[0059] The guide arc groove 33-13 can guide the action path of the vertical rod 34-1 when the top end of the vertical rod 34-1 contacts the bottom of the lower clamp seat 33-1, so that the lower clamp seat 33-1 gradually extends, and the battery connecting piece 33-3 gradually extends out of the receiving groove 32-1. This state is referred to as a "welding state".

[0060] The third positioning hole 33-14 can provide a significant change in resistance when the vertical rod 34-1 enters from the guide arc groove 33-13, thereby allowing the operator to determine the position of the top end of the vertical rod 34-1.

[0061] The bottom of the tray 32 is provided with a ring groove 32-2, and the ring groove 32-2 is provided with a through groove 32-3 which is in communication with the receiving groove 32-1.

[0062] The vertical rod 34-1 is sleeved with a third spring 34-2, one end of the third spring 34-2 is fixed to the bottom of the bearing seat 31, and the other end of the third spring 34-2 is fixed to the vertical rod 34-1.

[0063] The third spring 34-2 can always provide upward support force for the vertical rod 34-1, so as to avoid the vertical rod 34-1 from moving downward at will.

[0064] The stiffness coefficient of the third spring 34-2 is greater than the stiffness coefficient of the fourth spring 33-4, so that when the top of the vertical rod 34-1 contacts the upper clamp seat 33-2, the vertical rod 34-1 will lift the upper clamp seat 33-2 upward, and the fourth spring 33-4 is stretched, the lower clamp seat 33-1 and the upper clamp seat 33-2 are no longer positioned and clamped to the battery connecting piece 33-3, and the battery connecting piece 33-3 can be flexibly displaced. This state is referred to as "unloading state".

[0065] The top of the vertical rod 34-1 is provided with an inclined groove 34-11, and the bottom of the vertical rod 34-1 abuts against the triggering end of the limit switch 35.

[0066] When the top end of the vertical rod 34-1 contacts the first positioning hole 33-21, the inclined groove 34-11 is still located in the through groove 32-3. When the tray 32 is driven to rotate again, the vertical rod 34-1 will be pressed and moved downward under the cooperation of the inclined groove 34-11 and the guide, and the disengagement operation is completed.

[0067] The limit block 26 is fixed to the top of the hopper 21, and the supporting piece 25 includes a first spring 25-1 fixed to the bottom of the hopper 21, and the top of the first spring 25-1 is fixed with a supporting plate 25-2.

[0068] The first spring 25-1 is four in number and is symmetrically distributed at the bottom of the supporting plate 25-2, for providing uniform supporting force for the supporting plate 25-2.

[0069] Through the setting of the limiting block 26, the uppermost battery tab 22 can be limited and kept at a fixed horizontal position.

[0070] The first trough 11-1 is formed at the top of the bearing frame 11 and is in sliding cooperation with the hopper 21, and the second trough 11-2 is formed at one side of the bearing frame 11, and the limit switch 35 is embeddedly installed in the second trough 11-2.

[0071] The hopper 21 is bolted on the bearing frame 11, and the bottom of the hopper 21 is sunk into the first trough 11-1, for ensuring that the uppermost battery tab 22 is well aligned with the battery connecting piece 33-3, which is conducive to the subsequent welding of the ultrasonic welding head 13.

[0072] The limit switch 35 is a SPDT travel switch, one normally closed contact of which is electrically connected with the air pump 23-3, and the other normally open contact is electrically connected with the three-way electromagnetic valve 23-31, which is a normally closed electromagnetic valve, i.e. it is opened by power supply and closed by power off.

[0073] When the limit switch 35 is pressed down by the vertical rod 34-1, the air pump 23-3 is in a disconnected state, the three-way electromagnetic valve 23-31 is in a connected and opened state, the hollow roller 23-1 and the hollow sleeve 23-2 are in communication with the outside air, and the hollow sleeve 23-2 is in a natural state, i.e. it is not in contact with the battery tab 22, which is recorded as "deflated state".

[0074] When the limit switch 35 is not pressed down by the vertical rod 34-1, the air pump 23-3 is in a connected working state, and the three-way electromagnetic valve 23-31 is in a disconnected and closed state, the gas is continuously filled into the hollow roller 23-1 and the hollow sleeve 23-2 by the air pump 23-3, the hollow sleeve 23-2 rapidly expands and is in anti-slip contact with the battery tab 22, which is recorded as "inflated state".

[0075] In use, a plurality of battery tabs 22 are preloaded in the hopper 21, the battery connecting piece 33-3 is pre-clamped in the lower clamp seat 33-1 and the upper clamp seat 33-2, and is preloaded with a plurality of battery connecting pieces 33-3 in cooperation with the tray 32, which is in a "storage state", so that the operator can perform multiple welding processes without frequent feeding and discharging, thereby ensuring the overall processing efficiency.

[0076] When welding operation is performed, the operator drives the tray 32 to rotate and adjusts the battery connecting piece 33-3 to be between the upper guide roller 23-4 and the lower guide roller 23-5, which is in a "positioning state".

[0077] Continue to rotate the material disc 32, the battery connecting piece 33-3 can be explored out of the material disc 32 and placed on the battery tab 22, in the "welding state", at this time control the electric push rod 12 to extend and cooperate with the ultrasonic welding head 13, the battery tab 22 and the battery connecting piece 33-3 are integrally welded.

[0078] Continue to rotate the material disc 32, the lower clamp seat 33-1 and the upper clamp seat 33-2 are separated, in the "unloading state", cooperate with the transmission part 23 to move the battery tab 22 out of a distance, and then continue to rotate the material disc 32, when the un-welded battery connecting piece 33-3 is explored out of the material disc 32, the battery connecting piece 33-3 and the battery tab 22 welded are pushed away at the same time, which greatly facilitates the operator to take down the battery tab 22 and the battery connecting piece 33-3 after ultrasonic welding.

[0079] In the above process, when the battery connecting piece 33-3 is in the "storage state", the top end of the vertical rod 34-1 slides in the ring groove 32-2, as the material disc 32 further rotates, the vertical rod 34-1 enters the through groove 32-3 and is placed into the third positioning hole 33-14, the driving resistance of the material disc 32 changes, reminding the operator to perform subsequent actions.

[0080] Continue to rotate the material disc 32, the vertical rod 34-1 will slide in the guide arc groove 33-13, and then extrude the lower clamp seat 33-1 to gradually move out, link the battery connecting piece 33-3 to be placed between the upper guide roller 23-4 and the lower guide roller 23-5, until the welding position requirement is reached, at this time the vertical rod 34-1 is still in the guide arc groove 33-13, the lower clamp seat 33-1 and the upper clamp seat 33-2 still clamp the battery connecting piece 33-3, and the ultrasonic welding head 13 stably welds the battery tab 22 and the battery connecting piece 33-3.

[0081] And as the battery connecting piece 33-3 is explored out of displacement, the upper guide roller 23-4 rotates synchronously, under the cooperation of the incomplete gear 23-7 and the driven gear 23-6, the hollow roller 23-1 also rotates, and is energized by the coil spring 23-8.

[0082] After the ultrasonic welding is completed, continue to drive the material disc 32 to rotate, the top end of the vertical rod 34-1 is placed into the through hole 33-12 from the guide arc groove 33-13, and at this time the through hole 33-12 is aligned with the first positioning hole 33-21, under the support of the third spring 34-2, the vertical rod 34-1 pushes the upper clamp seat 33-2 upward away from the lower clamp seat 33-1, the fourth spring 33-4 is stretched, and the battery connecting piece 33-3 is no longer limited and can be flexibly displaced.

[0083] When the vertical rod 34-1 is inserted into the first positioning hole 33-21 at the top end, it no longer presses against the triggering end of the limit switch 35, and changes from the "deflated state" to the "inflated state". The air pump 23-3 works to pour gas into the hollow roller 23-1, causing the hollow sleeve 23-2 to expand and contact the battery tab 22. At the same time, the driven gear 23-6 is no longer engaged with the incomplete gear 23-7, and under the cooperation of the coil spring 23-8, the hollow sleeve 23-2 rapidly rotates to push out the welded battery tab 22, driving the welded battery connecting piece 33-3 to completely move out of the receiving groove 32-1.

[0084] The above-mentioned rotating tray 32 feeding operation is repeated, and when the new battery connecting piece 33-3 is inserted, it will press against the welded battery connecting piece 33-3 to further move out, facilitating the operator to remove the battery tab 22. Under the cooperation of the support 25, the new battery tab 22 and the new battery connecting piece 33-3 are welded by the ultrasonic welding head 13. In this way, the ultrasonic welding of multiple battery tabs 22 and battery connecting pieces 33-3 is completed, without the need for the operator to perform tedious steps. Embodiment 3

[0085] Reference Figures 3 to 14 For the third embodiment of the present application, this embodiment is based on the first two embodiments.

[0086] Specifically, the tray 32 includes a positioning base with four protruding feet at the bottom, and a rotating disc movably connected to the positioning base, as shown in the drawings Figure 13 The receiving groove 32-1, the ring groove 32-2 and the through groove 32-3 are all located on the rotating disc.

[0087] The top of the bearing seat 31 is provided with a recess, and the recess is in sliding cooperation with the protruding feet on the positioning base, as shown in the drawings Figure 9 This design can conveniently and accurately place the tray 32 on the bearing seat 31. In actual application, in order to avoid the tray 32 from being displaced and separated from the bearing seat 31, a damping strip is fixed in the recess to increase the friction force between the tray 32 and the bearing seat 31. The recess and the protruding feet can also be connected by magnetic attraction to prevent separation.

[0088] The lower clamp seat 33-1 is fixed with protruding blocks on both sides, and the receiving groove 32-1 is provided with a sliding groove in sliding cooperation with the protruding blocks, and the inner diameter of the sliding groove is smaller than the inner diameter of the receiving groove 32-1, which not only improves the stability of the lower clamp seat 33-1, but also avoids accidental displacement of the lower clamp seat 33-1 from the receiving groove 32-1.

[0089] The lower clamp seat 33-1 and the upper clamp seat 33-2 are provided with grooves on opposite sides, and the grooves are fixed with damping pads for providing a space for the battery connecting piece 33-3. When the lower clamp seat 33-1 and the upper clamp seat 33-2 are closed, the damping pads are compressed, the contact friction with the battery connecting piece 33-3 is increased, and the stability of the battery connecting piece 33-3 is ensured, so as to achieve the purpose of preventing the battery connecting piece 33-3 from falling off.

[0090] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, not limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A positioning device for ultrasonic welding of lithium batteries, characterized in that: include, An ultrasonic welding assembly includes a support frame on which an ultrasonic welding head is mounted; and... A material storage and positioning assembly, mounted on a support frame, includes a hopper fixed to the support frame, battery electrode tabs stacked inside the hopper, and a conveyor component mounted on top of the hopper; and... A feeding and positioning assembly, mounted on a support frame, includes a support base rotatably connected to the support frame, a material tray placed on top of the support base, and a feeding component on top of the material tray, including a lower clamp located within the material tray. A second spring is fixed to one side of the lower clamp, a guide groove is formed at the bottom of the lower clamp, and an upper clamp is positioned on top of the lower clamp. Several battery connecting pieces are arranged between the lower and upper clamps. A pressing component is provided on the support base, including a vertical rod slidably connected to the support base, with a limit switch at the bottom of the vertical rod. The transmission component includes a hollow roller rotatably connected to the hopper, with a hollow sleeve fixed to the outer ring of the hollow roller. An air pump is fixed to the hopper, and an upper guide roller and a lower guide roller are rotatably connected to one side of the hopper. An incomplete gear is fixed to one end of the upper guide roller, and a driven gear is fixed to the hollow roller, meshing with the incomplete gear. A coil spring is sleeved on the hollow roller, with one end fixed to the hollow roller and the other end fixed to the hopper. There are several hollow sleeves arranged in a circular array on the hollow roller, while the air vents are located inside the hollow sleeves. When the air pump inflates / evacuates the hollow roller, the hollow sleeves will expand or contract. The top of the material tray has a storage groove that slides with the lower clamp. The other end of the second spring is fixed in the storage groove. A fourth spring is fixed to the top of the lower clamp, and the other end of the fourth spring is fixed to the upper clamp. A third positioning hole is provided at both ends of the guide arc groove, and a through hole is provided at the center of the guide arc groove. The bottom of the material tray has an annular groove, and a through groove is formed inside the annular groove, which is connected to the storage groove. The top of the hopper is rotatably connected to a positioning roller, and a support component is installed inside the hopper. A limit block is fixed at the top of the hopper.

2. The positioning device for ultrasonic welding of lithium batteries as claimed in claim 1, characterized in that: The outer ring of the hollow roller has a vent hole and is connected to the hollow sleeve. One end of the air pump is connected to a three-way solenoid valve, and one end of the three-way solenoid valve is rotatably connected to the inner ring of the hollow roller through a sealed bearing.

3. The positioning device for ultrasonic welding of lithium batteries as claimed in claim 1, characterized in that: A third spring is fitted on the vertical rod. One end of the third spring is fixed to the bottom of the support base, and the other end of the third spring is fixed to the vertical rod.

4. The positioning device for ultrasonic welding of lithium batteries as claimed in claim 3, characterized in that: The top of the vertical rod has a sloping groove, and the bottom of the vertical rod abuts against the trigger end of the limit switch.

5. The positioning device for ultrasonic welding of lithium batteries as claimed in claim 1, characterized in that: The support includes a first spring fixed to the bottom of the hopper, and a support plate fixed to the top of the first spring.

6. The positioning device for ultrasonic welding of lithium batteries as claimed in claim 1, characterized in that: An electric push rod is fixed on the support frame, and an ultrasonic welding head is fixed to the output end of the electric push rod. A first material trough is opened on the top of the support frame and slides with the hopper. A second material trough is opened on one side of the support frame, and a limit switch is embedded in the second material trough.

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