Positioning device for ultrasonic welding of lithium battery

Abstract

The invention discloses a positioning device for lithium battery ultrasonic welding, and relates to the technical field of ultrasonic welding positioning, the positioning device comprises an ultrasonic welding assembly, the ultrasonic welding assembly comprises a bearing frame, an electric push rod is fixed on the bearing frame, and an ultrasonic welding head is fixed at the output end of the electric push rod; and the storage positioning assembly is arranged on the bearing frame and comprises a stock bin fixed on the bearing frame, battery tabs are placed in the stock bin, and a transmission piece is arranged at the top of the stock bin. The device has the beneficial effects that by means of the storage positioning assembly and the feeding positioning assembly, when the ultrasonic welding head is used for welding, side clamping and positioning can be conducted through the feeding piece, the welding stability is guaranteed, battery tabs and the upper clamping base are synchronously moved out in cooperation with the conveying piece during discharging, complex steps do not need to be repeated by operators, the manual error rate is effectively reduced, and the working efficiency is improved. And the overall welding yield and the machining efficiency are guaranteed, and the actual use requirement is better met.

Description

Technical Field

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

[0002] During the processing of large lithium batteries, the positive electrode tabs will be integrated with multiple layers of foil through a pre-welding process to form a square tab module. In order to weld the aluminum tabs to the thick connecting pieces, the two will be positioned with a positioning device and then processed using an ultrasonic welding process.

[0003] The positioning device in the prior art generally positions the tabs and connecting plates, which are manually placed by the operator and then manually removed after ultrasonic welding. This affects the actual welding processing efficiency, makes it difficult to conveniently perform feeding and positioning operations, and the operation steps are cumbersome and the operation time is long. It is more likely to cause operational errors that affect the overall welding efficiency. Summary of the Invention

[0004] In view of the above-mentioned problems existing in the existing positioning device for ultrasonic welding of lithium batteries, the present invention is proposed.

[0005] Therefore, the problem to be solved by the present invention is that the positioning device in the prior art is difficult to conveniently perform feeding and positioning operations, the operation steps are cumbersome, the operation time is long, and it is more likely to cause operational errors that affect the overall welding efficiency.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a positioning device for ultrasonic welding of lithium batteries, comprising: An ultrasonic welding assembly includes a carrier frame, an electric push rod is fixed on the carrier frame, and an ultrasonic welding head is fixed at the output end of the electric push rod; and A material storage positioning assembly is provided on a carrier frame, comprising a silo fixed to the carrier frame, wherein battery tabs are placed in the silo, a transmission member is provided on the top of the silo, a positioning roller is rotatably connected to the top of the silo, and a support member is provided in the silo; and A feeding positioning assembly is arranged on a supporting frame, and includes a supporting seat rotatably connected to the supporting frame, a material tray is placed on the top of the supporting seat, a loading piece is provided on the top of the material tray, including a lower clamping seat located in the material tray, a second spring is fixed to one side of the lower clamping seat, a guide arc groove is provided at the bottom of the lower clamping seat, an upper clamping seat is provided on the top of the lower clamping seat, a battery connecting piece is provided between the lower clamping seat and the upper clamping seat, and a pressure piece is provided on the supporting seat, including a vertical rod slidably connected to the supporting seat, and a limit switch is provided at the bottom of the vertical rod.

[0007] As a preferred solution of the positioning device for ultrasonic welding of lithium batteries described in the present invention, the transmission member includes a hollow roller rotatably connected to the silo, a hollow sleeve is fixed to the outer ring of the hollow roller, an air pump is fixed on the silo, and an upper guide roller and a lower guide roller are rotatably connected to one side of the silo.

[0008] As a preferred solution of the positioning device for ultrasonic welding of lithium batteries described in the present invention, the outer ring of the hollow roller is provided with an air vent 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.

[0009] As a preferred solution of the positioning device for ultrasonic welding of lithium batteries described in the present invention, an incomplete gear is fixed to one end of the upper guide roller, a driven gear is fixed to the hollow roller and meshes 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 silo.

[0010] As a preferred solution of the positioning device for ultrasonic welding of lithium batteries described in the present invention, wherein: a receiving groove is provided on the top of the material tray, which slides with the lower clamping seat, the other end of the second spring is fixed in the receiving groove, a fourth spring is fixed on the top of the lower clamping seat, and the other end of the fourth spring is fixed to the upper clamping seat, third positioning holes are provided at both ends of the guide arc groove, and a through hole is provided at the center of the guide arc groove.

[0011] As a preferred solution of the positioning device for ultrasonic welding of lithium batteries described in the present invention, a ring groove is provided at the bottom of the material tray, a through groove is provided in the ring groove, and is communicated with the receiving groove.

[0012] As a preferred solution of the positioning device for ultrasonic welding of lithium batteries described in the present invention, 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.

[0013] As a preferred solution of the positioning device for ultrasonic welding of lithium batteries described in the present invention, an oblique groove is provided on the top of the vertical rod, and the bottom of the vertical rod abuts against the trigger end of the limit switch.

[0014] As a preferred solution of the positioning device for ultrasonic welding of lithium batteries described in the present invention, a limiting block is fixed at the top of the silo, and the support member includes a first spring fixed to the bottom of the silo, and a support plate is fixed on the top of the first spring.

[0015] As a preferred solution of the positioning device for ultrasonic welding of lithium batteries described in the present invention, a first material trough is provided on the top of the supporting frame and slides with the material bin, a second material trough is provided on one side of the supporting frame, and the limit switch is embedded in the second material trough.

[0016] The beneficial effects of the present invention are as follows: through the material storage positioning component and the material feeding positioning component, a plurality of battery tabs can be stored in the material bin, and a plurality of upper clamping seats are carried by the material tray. When the upper clamping seats are rotated to feed material, the transmission component stores energy synchronously. When the ultrasonic welding head is welding, the side clamping and positioning are performed by the feeding component to ensure welding stability. When discharging the material, the battery tabs and the upper clamping seat are moved out synchronously with the transmission component. There is no need for the operator to repeat complicated steps, which effectively reduces the human error rate, ensures the overall welding yield and processing efficiency, and is more in line with actual use needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] Figure 1 This is a structural diagram of a positioning device used for ultrasonic welding of lithium batteries.

[0019] Figure 2 This is a structural diagram of the ultrasonic welding assembly of a positioning device used for ultrasonic welding of lithium batteries.

[0020] Figure 3 A top view of the material storage positioning assembly and the material feeding positioning assembly of a positioning device for ultrasonic welding of lithium batteries.

[0021] Figure 4 Another perspective view of the material storage positioning component of the positioning device used for ultrasonic welding of lithium batteries.

[0022] Figure 5 A cross-sectional view of the material storage positioning assembly of a positioning device for ultrasonic welding of lithium batteries.

[0023] Figure 6 This is a structural diagram of the transmission component of the positioning device used for ultrasonic welding of lithium batteries.

[0024] Figure 7 Positioning device for ultrasonic welding of lithium batteries Figure 5 Enlarged view of point A in the middle.

[0025] Figure 8 This is a structural diagram of the feeding and positioning components of a positioning device used for ultrasonic welding of lithium batteries.

[0026] Figure 9 This is a structural diagram of the feeding and positioning components of the positioning device used for ultrasonic welding of lithium batteries when separated.

[0027] Figure 10 Positioning device for ultrasonic welding of lithium batteries Figure 9 Enlarged view of point B in the middle.

[0028] Figure 11 Positioning device for ultrasonic welding of lithium batteries Figure 9 Enlarged view of point C in the middle.

[0029] Figure 12 This is a diagram of the separation of the loading part and the material tray of the positioning device used for ultrasonic welding of lithium batteries.

[0030] Figure 13 Another perspective of the positioning device used for ultrasonic welding of lithium batteries when the loading part is separated from the tray.

[0031] Figure 14 Positioning device for ultrasonic welding of lithium batteries Figure 13 Enlarged view of point D in the middle.

[0032] In the figure: 1. Ultrasonic welding assembly; 11. Carrier; 11-1. First trough; 11-2. Second trough; 12. Electric push rod; 13. Ultrasonic welding head; 2. Storage and positioning assembly; 21. Bin; 22. Battery tab; 23. Transmission element; 23-1. Hollow roller; 23-11. Air vent; 23-2. Hollow sleeve; 23-3. Air pump; 23-31. Three-way solenoid 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 element; 25-1. First Spring; 25-2, support plate; 26, limit block; 3, feeding positioning assembly; 31, bearing seat; 32, material tray; 32-1, storage groove; 32-2, ring groove; 32-3, through groove; 33, loading 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, limit switch. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0035] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments. Example 1

[0036] Reference Figure 1 and Figure 2 , which is the first embodiment of the present invention, provides a positioning device for ultrasonic welding of lithium batteries. The positioning device for ultrasonic welding of lithium batteries includes an ultrasonic welding component 1, a material storage positioning component 2 and a material feeding positioning component 3. Through the material storage positioning component 2 and the material feeding positioning component 3, two materials can be stored in large quantities, and side clamping and positioning can be performed during ultrasonic welding to ensure welding stability. During discharge, the material is removed after welding, and the two materials are automatically replaced, without the operator having to repeat complicated steps (loading-clamping-welding-unloading), effectively reducing the human error rate and ensuring the overall welding yield and processing efficiency.

[0037] Specifically, the ultrasonic welding assembly 1 includes a carrier frame 11 , an electric push rod 12 is fixed on the carrier frame 11 , and an ultrasonic welding head 13 is fixed to the output end of the electric push rod 12 .

[0038] The supporting frame 11 includes a base and a frame fixed on the top of the base, wherein the electric push rod 12 is bolted to the frame, and the working principle and operation method of the ultrasonic welding head 13 are existing technologies, which are clearly known to those skilled in the art and will not be elaborated here.

[0039] Specifically, the material storage positioning assembly 2 is arranged on the supporting frame 11, including a material bin 21 fixed on the supporting frame 11, a battery tab 22 is placed in the material bin 21, a transmission member 23 is provided on the top of the material bin 21, a positioning roller 24 is rotatably connected to the top of the material bin 21, and a support member 25 is provided in the material bin 21.

[0040] There are several battery pole tabs 22, which are stacked in the silo 21. Through the setting of the transmission part 23, it can contact the top battery pole tab 22 in the inflated state, and is used to drive the top battery pole tab 22 to move; in the deflating state, it does not contact the top battery pole tab 22. At this time, the action of the transmission part 23 will not affect the position of the battery pole tab 22.

[0041] The support member 25 can provide an upward supporting force for the battery tab 22 to ensure that after the upper battery tab 22 is moved out, the lower battery tab 22 automatically moves upward to replace it.

[0042] Specifically, the feeding positioning assembly 3 is arranged on the supporting frame 11, including a supporting seat 31 rotatably connected to the supporting frame 11, a material tray 32 is placed on the top of the supporting seat 31, and a loading member 33 is arranged on the top of the material tray 32, including a lower clamping seat 33-1 located in the material 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 provided at the bottom of the lower clamping seat 33-1, an upper clamping seat 33-2 is provided on the top of the lower clamping seat 33-1, a battery connecting piece 33-3 is provided between the lower clamping seat 33-1 and the upper clamping seat 33-2, and a pressure member 34 is provided on the supporting seat 31, including a vertical rod 34-1 slidably connected to the supporting seat 31, and a limit switch 35 is provided at the bottom of the vertical rod 34-1.

[0043] The supporting seat 31 is fixed on the supporting frame 11. Through the setting of the loading piece 33, the lower clamping seat 33-1 and the upper clamping seat 33-2 can position and clamp the battery connecting piece 33-3 in the closed state to ensure the transportation stability of the battery connecting piece 33-3. In the open state, the battery connecting piece 33-3 can be flexibly displaced and detached. Example 2

[0044] Reference Figures 2 to 14 , which is the second embodiment of the present invention, and this embodiment is based on the previous embodiment.

[0045] Specifically, the transmission member 23 includes a hollow roller 23-1 rotatably connected to the silo 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 silo 21, and an upper guide roller 23-4 and a lower guide roller 23-5 are rotatably connected to one side of the silo 21.

[0046] The distance between the upper guide roller 23-4 and the lower guide roller 23-5 is adapted to 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, it will synchronously drive the upper guide roller 23-4 and the lower guide roller 23-5 to rotate, which can effectively improve the transmission stability of the battery connecting piece 33-3.

[0047] The outer ring of the hollow roller 23-1 is provided with an air vent 23-11, which is connected to the hollow sleeve 23-2. One end of the air pump 23-3 is connected to a three-way solenoid valve 23-31, and one end of the three-way solenoid valve 23-31 is rotatably connected to the inner ring of the hollow roller 23-1 through a sealed bearing.

[0048] There are several hollow sleeves 23-2, which are distributed in a circular array on the hollow roller 23-1, and the air holes 23-11 are located on the inner side of the hollow sleeve 23-2, which are used to connect the hollow roller 23-1 with the hollow sleeve 23-2. When the air pump 23-3 inflates / deflates the hollow roller 23-1, the hollow sleeve 23-2 will expand or contract.

[0049] The hollow sleeve 23-2 is made of chloroprene rubber, which has the advantages of high anti-slip properties, excellent weather resistance, and a balance of elasticity and strength. It has good tensile properties and tear resistance, and can withstand repeated inflation / deflation. At the same time, when it is expanded, its outer side is in non-slip contact with the surface of the battery tab 22. When the hollow sleeve 23-2 rotates, it will move the battery tab 22.

[0050] An incomplete gear 23-7 is fixed to one end of the upper guide roller 23-4, a driven gear 23-6 is fixed to the hollow roller 23-1 and meshes with the incomplete gear 23-7, a coil spring 23-8 is sleeved on the hollow roller 23-1, one end of the coil spring 23-8 is fixed to the hollow roller 23-1, and the other end of the coil spring 23-8 is fixed to the silo 21.

[0051] The specifications of the incomplete gear 23-7 are larger than those of the driven gear 23-6, and when the upper guide roller 23-4 rotates, the rotation of the hollow roller 23-1 will be accelerated. Through the setting of the driven gear 23-6 and the incomplete gear 23-7, when the two are engaged, the rotation of the incomplete gear 23-7 can drive the driven gear 23-6 to rotate synchronously, and cooperate with the coil spring 23-8 to store energy. When the driven gear 23-6 and the incomplete gear 23-7 are no longer engaged, the rotations of the driven gear 23-6 and the incomplete gear 23-7 do not affect each other.

[0052] A receiving groove 32-1 is provided on the top of the material tray 32, which slides with the lower clamping seat 33-1. The other end of the second spring 33-11 is fixed in the receiving groove 32-1. A fourth spring 33-4 is fixed on the top of the lower clamping seat 33-1. The other end of the fourth spring 33-4 is fixed to the upper clamping seat 33-2. Third positioning holes 33-14 are provided at both ends of the guide arc groove 33-13, and a through hole 33-12 is provided at the center of the guide arc groove 33-13.

[0053] The second spring 33-11 can provide an elastic connection force for the lower clamping seat 33-1, thereby preventing the lower clamping seat 33-1 from moving outward at will in the absence of external force, and keeping the battery connecting piece 33-3 in the receiving groove 32-1. This state is recorded as the "storage state".

[0054] By providing the fourth spring 33 - 4 , the lower clamping seat 33 - 1 and the upper clamping seat 33 - 2 can be elastically connected, thereby providing a good positioning and clamping force for the lightweight battery connecting piece 33 - 3 . This state is recorded as a “positioning state”.

[0055] 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 , pressing the upper clamping seat 33 - 2 to move upward for a distance.

[0056] The guiding arc groove 33-13 can guide the movement path of the vertical rod 34-1 when the top 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 protrudes out of the storage groove 32-1. This state is recorded as the "welding state".

[0057] The third positioning hole 33 - 14 can provide a significant change in resistance when the vertical rod 34 - 1 enters the guide arc groove 33 - 13 , thereby allowing the operator to determine the position of the top end of the vertical rod 34 - 1 .

[0058] An annular groove 32 - 2 is formed at the bottom of the material tray 32 , and a through groove 32 - 3 is formed in the annular groove 32 - 2 and communicates with the receiving groove 32 - 1 .

[0059] A third spring 34 - 2 is sleeved on the vertical rod 34 - 1 . 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 .

[0060] The third spring 34 - 2 can always provide an upward supporting force for the vertical rod 34 - 1 to prevent the vertical rod 34 - 1 from moving downward at will.

[0061] The spring coefficient of the third spring 34-2 is greater than the spring coefficient of the fourth spring 33-4. When the top of the vertical rod 34-1 contacts the upper clamping seat 33-2, the vertical rod 34-1 will push the upper clamping seat 33-2 upward and separate it from the lower clamping seat 33-1. The fourth spring 33-4 is stretched, and the lower clamping seat 33-1 and the upper clamping seat 33-2 no longer position and clamp the battery connecting piece 33-3. The battery connecting piece 33-3 can be flexibly displaced. This state is recorded as "unloading state".

[0062] An oblique slot 34 - 11 is formed at the top of the vertical rod 34 - 1 , and the bottom of the vertical rod 34 - 1 abuts against the trigger end of the limit switch 35 .

[0063] When the top 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. With this design, when the material tray 32 is driven to rotate again, the vertical rod 34-1 will be pressed and moved downward under the guidance of the inclined groove 34-11, completing the disengagement operation.

[0064] A limit block 26 is fixed at the top of the silo 21 . The support member 25 includes a first spring 25 - 1 fixed at the bottom of the silo 21 . A support plate 25 - 2 is fixed at the top of the first spring 25 - 1 .

[0065] There are four first springs 25 - 1 symmetrically distributed at the bottom of the support plate 25 - 2 , and are used to provide uniform supporting force for the support plate 25 - 2 .

[0066] By setting the limiting block 26 , the uppermost battery tab 22 can be limited, and the uppermost battery tab 22 can be kept in a fixed horizontal position.

[0067] A first material trough 11 - 1 is provided on the top of the carrier 11 and is slidably matched with the material bin 21 . A second material trough 11 - 2 is provided on one side of the carrier 11 , and a limit switch 35 is embedded in the second material trough 11 - 2 .

[0068] The hopper 21 is bolted to the carrier frame 11 , and the bottom of the hopper 21 is sunk into the first trough 11 - 1 to ensure that the topmost battery tab 22 and the battery connecting piece 33 - 3 are well aligned, which is beneficial to the subsequent welding of the ultrasonic welding head 13 .

[0069] The limit switch 35 is an SPDT travel switch, and one normally closed contact of the limit switch 35 is electrically connected to the air pump 23-3, and the other normally open contact is electrically connected to the three-way solenoid valve 23-31. The three-way solenoid valve 23-31 is a normally closed solenoid valve, that is, it is opened when power is on and closed when power is off.

[0070] When the limit switch 35 is pressed down by the vertical rod 34-1, the air pump 23-3 is in the disconnected state, the three-way solenoid valve 23-31 is in the connected open state, the hollow roller 23-1 and the hollow sleeve 23-2 are connected to the outside air, and the hollow sleeve 23-2 is in a natural state, which is not in contact with the battery tab 22, and is recorded as the "deflation state".

[0071] 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, the three-way solenoid valve 23-31 is in a disconnected closed state, and the gas is continuously charged into the hollow roller 23-1 and the hollow sleeve 23-2 by the air pump 23-3. The hollow sleeve 23-2 expands rapidly and comes into anti-slip contact with the battery tab 22, which is recorded as the "inflated state".

[0072] When in use, multiple battery tabs 22 are pre-installed in the hopper 21, the battery connecting piece 33-3 is pre-clamped in the lower clamping seat 33-1 and the upper clamping seat 33-2, and multiple battery connecting pieces 33-3 are pre-installed in the material tray 32, which is in a "storage state". The operator can perform multiple welding processes without frequent loading and unloading, ensuring overall processing efficiency.

[0073] When performing welding operations, the operator drives the material tray 32 to rotate and adjusts the battery connecting piece 33-3 to between the upper guide roller 23-4 and the lower guide roller 23-5, which is a "positioning state".

[0074] Continue to rotate the tray 32 to extend the battery connecting piece 33-3 out of the tray 32 and place it on the battery tab 22, which is the "welding state". At this time, control the electric push rod 12 to extend and cooperate with the ultrasonic welding head 13 to weld the battery tab 22 and the battery connecting piece 33-3 into one.

[0075] Continue to rotate the material tray 32, and after the lower clamping seat 33-1 and the upper clamping seat 33-2 are separated, it is in the "unloading state". Cooperate with the transmission part 23 to move the battery pole ear piece 22 out a distance, and then continue to rotate the material tray 32. When the unwelded battery connecting piece 33-3 protrudes from the material tray 32, the welded battery connecting piece 33-3 and the battery pole ear piece 22 are pushed together, which greatly facilitates the operator to remove the ultrasonically welded battery pole ear piece 22 and battery connecting piece 33-3.

[0076] 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 annular groove 32-2. As the material tray 32 rotates further, the vertical rod 34-1 enters the through groove 32-3 and is placed in the third positioning hole 33-14, driving the material tray 32 to change its resistance, reminding the operator to perform subsequent actions.

[0077] As the material tray 32 continues to rotate, the vertical rod 34-1 will slide in the guide arc groove 33-13, thereby squeezing the lower clamping seat 33-1 to gradually move outward, and the linked battery connecting piece 33-3 will 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, and the lower clamping seat 33-1 and the upper clamping seat 33-2 are still clamping the battery connecting piece 33-3. The ultrasonic welding head 13 performs stable welding on the battery tab 22 and the battery connecting piece 33-3.

[0078] As the battery connecting piece 33-3 extends outward, the upper guide roller 23-4 rotates synchronously. With the cooperation of the incomplete gear 23-7 and the driven gear 23-6, the hollow roller 23-1 also rotates and is energy-storing by the coil spring 23-8.

[0079] After the ultrasonic welding is completed, continue to drive the material tray 32 to rotate, and the top of the vertical rod 34-1 is placed in the through hole 33-12 by 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 will push the upper clamp seat 33-2 upward away from the lower clamp seat 33-1, and the fourth spring 33-4 is stretched, and the battery connecting piece 33-3 is no longer restricted and can be flexibly displaced.

[0080] When the top end of the vertical rod 34-1 is placed in the first positioning hole 33-21, it no longer presses against the trigger end of the limit switch 35, and is converted from a "deflated state" to an "inflated state". The air pump 23-3 works to inject 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. With the cooperation of the coil spring 23-8, the hollow sleeve 23-2 rotates rapidly to push out the welded battery tab 22, driving the welded battery connecting piece 33-3 to completely move out of the storage slot 32-1.

[0081] Repeat the above-mentioned feeding operation of the rotating material tray 32. When the new battery connecting piece 33-3 is extended, the welded battery connecting piece 33-3 will be pressed to move it further out, making it convenient for the operator to remove the battery pole tab 22. With the cooperation of the support member 25, the new battery pole tab 22 and the new battery connecting piece 33-3 are welded by the ultrasonic welding head 13. In this cycle, the ultrasonic welding process of multiple battery pole tabs 22 and battery connecting pieces 33-3 is completed without the operator having to perform tedious steps. Example 3

[0082] Reference Figures 3 to 14 , which is the third embodiment of the present invention, and is based on the first two embodiments.

[0083] Specifically, the material tray 32 includes a positioning chassis with four protruding feet at the bottom, and a turntable movably connected to the positioning chassis, as shown in the accompanying drawings of the specification. Figure 13 As shown, the receiving groove 32-1, the annular groove 32-2 and the through groove 32-3 are all located on the turntable.

[0084] The top of the support seat 31 is provided with a groove, which is slidably matched with the protruding feet on the positioning chassis, as shown in the accompanying drawings of the specification. Figure 9 As shown, this design can easily and accurately place the material tray 32 on the supporting seat 31. In actual application, in order to prevent the material tray 32 from randomly moving and separating from the supporting seat 31, a damping strip is fixed in the groove to increase the contact friction with the convex foot. The groove and the convex foot can also be connected by magnetic adsorption to prevent them from falling off.

[0085] There are protrusions fixed on both sides of the lower clamping seat 33-1, and a sliding groove is opened in the storage groove 32-1, which slides with the protrusions, and the inner diameter of the sliding groove is smaller than the inner diameter of the storage groove 32-1. This not only improves the movement stability of the lower clamping seat 33-1, but also prevents the lower clamping seat 33-1 from accidentally moving out of the storage groove 32-1.

[0086] A material groove is provided on the opposite side of the lower clamp seat 33-1 and the upper clamp seat 33-2, and a damping pad is fixed in the material groove to provide a placement space for the battery connecting piece 33-3. When the lower clamp seat 33-1 and the upper clamp seat 33-2 are in the closed state, the damping pad is compressed, which increases the contact friction with the battery connecting piece 33-3 and ensures the positioning stability of the battery connecting piece 33-3, thereby achieving the purpose of anti-detachment protection.

[0087] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention 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 invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A positioning device for ultrasonic welding of lithium batteries, characterized by: include, An ultrasonic welding assembly (1) comprises a carrier (11), wherein an ultrasonic welding head (13) is provided on the carrier (11); and A material storage positioning assembly (2) is arranged on a carrier (11), comprising a silo (21) fixed to the carrier (11), wherein battery tabs (22) are placed in the silo (21), and a transmission member (23) is arranged on the top of the silo (21); and A feeding positioning assembly (3) is arranged on a carrier (11), comprising a carrier seat (31) rotatably connected to the carrier frame (11), a material tray (32) being placed on the top of the carrier seat (31), a feeding member (33) being arranged on the top of the material tray (32), comprising a lower clamping seat (33-1) located in the material tray (32), a second spring (33-11) being fixed to one side of the lower clamping seat (33-1), a guiding arc groove (33-13) being provided at the bottom of the lower clamping seat (33-1), an upper clamping seat (33-2) being arranged on the top of the lower clamping seat (33-1), a battery connecting piece (33-3) being arranged between the lower clamping seat (33-1) and the upper clamping seat (33-2), a pressing member (34) being arranged on the carrier seat (31), comprising a vertical rod (34-1) slidably connected to the carrier seat (31), and a limit switch (35) being arranged at the bottom of the vertical rod (34-1).

2. The positioning device for ultrasonic welding of lithium batteries according to claim 1, characterized in that: The transmission member (23) comprises a hollow roller (23-1) rotatably connected to the silo (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 silo (21); and an upper guide roller (23-4) and a lower guide roller (23-5) are rotatably connected to one side of the silo (21).

3. The positioning device for ultrasonic welding of lithium batteries according to claim 2, characterized in that: The outer ring of the hollow roller (23-1) is provided with an air vent (23-11) and is in communication with the hollow sleeve (23-2); one end of the air pump (23-3) is in communication with a three-way solenoid valve (23-31); one end of the three-way solenoid valve (23-31) is rotatably connected to the inner ring of the hollow roller (23-1) via a sealed bearing.

4. The positioning device for ultrasonic welding of lithium batteries according to claim 3, characterized in that: An incomplete gear (23-7) is fixed to one end of the upper guide roller (23-4), a driven gear (23-6) is fixed to the hollow roller (23-1) and meshes with the incomplete gear (23-7), a coil spring (23-8) is sleeved on the hollow roller (23-1), one end of the coil spring (23-8) is fixed to the hollow roller (23-1), and the other end of the coil spring (23-8) is fixed to the silo (21).

5. The positioning device for ultrasonic welding of lithium batteries according to claim 1, characterized in that: A receiving groove (32-1) is provided on the top of the material tray (32) and is slidably matched with the lower clamping seat (33-1). The other end of the second spring (33-11) is fixed in the receiving groove (32-1). A fourth spring (33-4) is fixed on the top of the lower clamping seat (33-1). The other end of the fourth spring (33-4) is fixed to the upper clamping seat (33-2). Third positioning holes (33-14) are provided at both ends of the guide arc groove (33-13). A through hole (33-12) is provided at the center of the guide arc groove (33-13).

6. The positioning device for ultrasonic welding of lithium batteries according to claim 5, characterized in that: The bottom of the material tray (32) is provided with an annular groove (32-2), and a through groove (32-3) is provided in the annular groove (32-2) and is communicated with the storage groove (32-1).

7. The positioning device for ultrasonic welding of lithium batteries according to claim 1, characterized in that: A third spring (34-2) is sleeved on the vertical rod (34-1), 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).

8. The positioning device for ultrasonic welding of lithium batteries according to claim 7, characterized in that: An oblique slot (34-11) is provided on the top of the vertical rod (34-1), and the bottom of the vertical rod (34-1) abuts against the trigger end of the limit switch (35).

9. The positioning device for ultrasonic welding of lithium batteries according to claim 1, characterized in that: The top of the silo (21) is rotatably connected to a positioning roller (24), a support member (25) is provided in the silo (21), a limiting block (26) is fixed at the top of the silo (21), and the support member (25) includes a first spring (25-1) fixed to the bottom of the silo (21), and a support plate (25-2) is fixed on the top of the first spring (25-1).

10. The positioning device for ultrasonic welding of lithium batteries according to claim 1, characterized in that: An electric push rod (12) is fixed on the carrier (11), and the ultrasonic welding head (13) is fixed to the output end of the electric push rod (12). A first material trough (11-1) is provided on the top of the carrier (11) and is slidably matched with the material bin (21). A second material trough (11-2) is provided on one side of the carrier (11), and the limit switch (35) is embedded in the second material trough (11-2).

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