An ultrasonic welding device for electrode tabs

Abstract

This utility model relates to an ultrasonic welding device for electrode tabs, belonging to the field of electrode tab welding technology. It includes an ultrasonic transducer, an amplitude modulator, a welding head, and a welding base. The amplitude modulator is mounted on the ultrasonic transducer. The welding head has a first welding tooth at its left end, a second welding tooth at its right end, a third welding tooth at its top, and a fourth welding tooth at its bottom. The first, second, third, and fourth welding teeth are all positioned opposite the welding base. The welding head has several mounting holes penetrating the front and rear sidewalls of the welding head. Mounting rods are inserted into the mounting holes, and a connecting rod is provided at one end of each mounting rod. The connecting rod is connected to the amplitude modulator. A threaded hole is provided at the other end of the mounting rod, and a locking bolt is threaded into the threaded hole. The locking bolt is used to abut the welding head against the connecting rod. This application has the effect of extending the service life of the welding head.

Description

Technical Field

[0001] This utility model relates to the field of electrode welding technology, and in particular to an ultrasonic electrode welding device. Background Technology

[0002] Lithium-ion battery cells are made up of multiple layers of cell electrode sheets stacked together. The tab foils extending from each cell electrode sheet are welded together to form tabs. Currently, tab welding usually uses ultrasonic welding technology. Ultrasonic welding technology uses high-frequency vibration waves to be transmitted to the surfaces of two objects to be welded. Under pressure, the surfaces of the two objects rub against each other to form a fusion between molecular layers.

[0003] Existing ultrasonic welding equipment mainly consists of an ultrasonic transducer, an amplitude modulator, a welding head, and a welding base. The amplitude modulator is mounted on the ultrasonic transducer, and the welding head is mounted on the amplitude modulator, with the welding head and welding base positioned opposite each other. The welding base and welding head press multiple layers of tab foil together. The ultrasonic transducer converts high-frequency electrical signals into high-frequency vibrations, which are transmitted to the welding head to weld the tab foil together to form tabs. However, the welding teeth on the welding head are prone to wear, resulting in a short service life for the welding head. Utility Model Content

[0004] In order to extend the service life of the welding head, this application provides an ultrasonic welding device for electrode tabs.

[0005] The ultrasonic welding device for electrode tabs provided in this application adopts the following technical solution:

[0006] An ultrasonic welding device for electrodes includes an ultrasonic transducer, an amplitude modulator, a welding head, and a welding base. The amplitude modulator is mounted on the ultrasonic transducer. The welding head has a first welding tooth at its left end, a second welding tooth at its right end, a third welding tooth at its top end, and a fourth welding tooth at its bottom end. The first, second, third, and fourth welding teeth are all positioned opposite the welding base. The welding head has several mounting holes that penetrate the front and rear sidewalls of the welding head. A mounting rod is inserted into each mounting hole. One end of each mounting rod has a connecting rod connected to the amplitude modulator. The other end of each mounting rod has a threaded hole into which a locking bolt is threaded. The locking bolt is used to abut the welding head against the connecting rod.

[0007] By adopting the above technical solution, the first welding tooth, the second welding tooth, the third welding tooth, and the fourth welding tooth are respectively set on the four side walls of the welding head. When the first welding tooth is worn, the second welding tooth can continue to face the welding seat to achieve the effect of pressing and welding the multi-layer electrode foil. When the third welding tooth is worn, the fourth welding tooth can continue to face the welding seat to achieve the effect of pressing and welding the multi-layer electrode foil, thus extending the service life of the welding head. When the welding head is replaced, the locking bolt is removed to take the welding head out of the mounting rod, and then the mounting rod is inserted into the new welding head. Finally, the locking bolt is screwed into the threaded hole so that the welding head abuts between the connecting rod and the locking bolt.

[0008] Preferably, the welding base is provided at the bottom, a lifting bracket is fixedly provided on the base, a lifting seat is slidably provided on the lifting bracket, and the lifting seat is rotatably connected to the ultrasonic transducer.

[0009] By adopting the above technical solution, the lifting seat slides along the lifting bracket to achieve the effect of lifting the welding head, and the ultrasonic transducer rotates on the lifting seat to achieve the effect of rotating the welding head, so that the first welding tooth, the second welding tooth, the third welding tooth and the fourth welding tooth face the welding seat respectively.

[0010] Preferably, a piston cylinder is fixedly mounted on the lifting bracket, and the output shaft of the piston cylinder is fixedly connected to the lifting seat.

[0011] By adopting the above technical solution, the extension and retraction of the piston cylinder's output shaft achieves the effect of driving the lifting seat to slide along the lifting bracket.

[0012] Preferably, a lifting guide hole is formed through the lifting base, a lifting guide rod is inserted into the lifting guide hole, the top end of the lifting guide rod is fixedly connected to the lifting bracket, and the bottom end of the lifting guide rod is fixedly connected to the base.

[0013] By adopting the above technical solution, the lifting guide rod provides support for the lifting bracket on the one hand, and allows the lifting seat to move along the lifting guide rod on the other hand.

[0014] Preferably, a rotating hole is formed through the lifting base, a rotating shaft is inserted into the rotating hole, the rotating shaft is rotatably connected to the rotating hole, one end of the rotating shaft is fixedly connected to the ultrasonic transducer, and a positioning component is provided at the other end of the rotating shaft. The positioning component is used to keep the rotating shaft and the lifting base relatively stationary.

[0015] By adopting the above technical solution, the ultrasonic transducer is rotatably connected to the lifting base through a rotating shaft. When the rotating shaft rotates to a suitable position, the positioning component is used to keep the rotating shaft and the lifting base relatively stationary.

[0016] Preferably, the positioning assembly includes a positioning plate and a positioning rod. The positioning plate is fixedly mounted on the end of the rotating shaft away from the ultrasonic transducer. A positioning hole is formed on the positioning plate, and the positioning rod is inserted into the positioning hole. A first positioning groove, a second positioning groove, a third positioning groove, and a fourth positioning groove are formed on the side of the lifting seat away from the ultrasonic transducer. The first positioning groove, the second positioning groove, the third positioning groove, and the fourth positioning groove are for the positioning rod to be inserted.

[0017] By adopting the above technical solution, the rotating shaft drives the positioning plate to rotate. When the rotating shaft rotates to the appropriate position, the positioning rod is inserted into the first positioning groove, the second positioning groove, the third positioning groove, or the fourth positioning groove at the end facing the lifting seat, so that the positioning plate and the lifting seat remain relatively stationary, thus achieving the effect of keeping the rotating shaft and the lifting seat relatively stationary.

[0018] Preferably, the inner wall of the positioning hole is provided with an internal thread groove, the outer wall of the positioning rod is provided with an external thread groove, the internal thread groove and the external thread groove cooperate with each other, and the positioning rod is threadedly connected to the positioning hole.

[0019] By adopting the above technical solution, the positioning rod is threadedly connected to the positioning hole, reducing the possibility of the positioning rod falling out of the positioning hole.

[0020] Preferably, a movable groove is provided on the base, a movable seat is slidably disposed in the movable groove, the movable seat is fixedly connected to the welding seat, and a movable lead screw is rotatably disposed in the movable groove, the movable lead screw being threadedly connected to the movable seat.

[0021] By adopting the above technical solution, the rotation of the moving screw drives the moving seat to move along the moving groove, and the movement of the moving seat drives the welding seat to move, thereby achieving the effect of adjusting the relative position of the welding head and the welding seat.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. By setting up an ultrasonic transducer, amplitude modulator, welding head, welding base, first welding tooth, second welding tooth, third welding tooth, fourth welding tooth, mounting hole, mounting, connecting rod, threaded hole and locking bolt, the effect of pressing and welding multi-layer electrode foil sheets is achieved, and the service life of the welding head is extended;

[0024] 2. The welding head lifting effect is achieved by setting a base, lifting bracket, lifting seat, piston cylinder, lifting guide rod and lifting guide hole;

[0025] 3. By setting a rotating hole, a rotating shaft, and a positioning component, the ultrasonic transducer and the lifting base are rotatably connected. When the rotating shaft rotates to the appropriate position, the positioning component keeps the rotating shaft and the lifting base relatively stationary. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of an ultrasonic welding device for electrode tabs in an embodiment of this application.

[0027] Figure 2 This is a schematic diagram illustrating the positional relationship between the welding head and the locking bolt in the embodiments of this application.

[0028] Figure 3 This is a schematic diagram illustrating the connection relationship between the welding head and the ultrasonic transducer in the embodiments of this application.

[0029] Figure 4 This is a cross-sectional view illustrating the connection relationship between the welding head and the connecting rod in the embodiments of this application.

[0030] Figure 5 This is a cross-sectional view illustrating the connection between the lifting seat and the lifting bracket in the embodiments of this application.

[0031] Figure 6 This is a cross-sectional view showing the connection relationship between the positioning plate and the lifting seat in an embodiment of this application.

[0032] Figure 7 This is a schematic diagram illustrating the positional relationship between the third positioning groove and the fourth positioning groove in an embodiment of this application.

[0033] Figure 8 This is a schematic diagram illustrating the connection relationship between the positioning rods in the embodiments of this application.

[0034] Figure 9 This is a cross-sectional view illustrating the connection between the base and the welding seat in the embodiments of this application.

[0035] Explanation of reference numerals in the attached drawings: 1. Welding base; 2. Ultrasonic transducer; 21. Amplitude modulator; 3. Welding head; 31. First welding tooth; 32. Second welding tooth; 33. Third welding tooth; 34. Fourth welding tooth; 4. Mounting rod; 41. Mounting hole; 42. Connecting rod; 43. Threaded hole; 44. Locking bolt; 5. Base; 51. Moving groove; 52. Moving seat; 53. Moving screw; 6. Lifting bracket; 61. Piston cylinder; 62. Lifting seat; 621. First positioning groove; 622. Second positioning groove; 623. Third positioning groove; 624. Fourth positioning groove; 63. Lifting guide rod; 631. Lifting guide hole; 7. Rotating shaft; 71. Rotating hole; 8. Positioning assembly; 81. Positioning plate; 811. Positioning hole; 812. Internal threaded groove; 82. Positioning rod; 821. External threaded groove. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0037] This application discloses an ultrasonic welding apparatus for electrode tabs. (Refer to...) Figures 1 to 6The system includes a base 5, a lifting bracket 6 welded to the base 5, a piston cylinder 61 mounted on the lifting bracket 6, and a lifting seat 62 mounted on the output shaft of the piston cylinder 61. When the output shaft of the piston cylinder 61 extends or retracts, it drives the lifting seat 62 to move up and down along the lifting bracket 6. A rotating hole 71 is formed through the lifting seat 62, and a rotating shaft 7 is inserted into the rotating hole 71, rotatably connected to the rotating hole 71. An ultrasonic transducer 2 is mounted on one end of the rotating shaft 7, and a positioning component 8 is mounted on the other end of the rotating shaft 7. The positioning component 8 is used to keep the rotating shaft 7 and the lifting seat 62 relatively stationary. A welding seat 1 is mounted on the base 5, and a welding head 3 is provided above the welding seat 1. Several mounting holes 41 are formed on the welding head 3, which penetrate the front and rear side walls of the welding head 3, and mounting rods 4 are inserted into the mounting holes 41. One end of the mounting rod 4 is connected to the connecting rod 42, and an amplitude modulator 21 is installed between the connecting rod 42 and the ultrasonic transducer 2. The other end of the mounting rod 4 has a threaded hole 43, and a locking bolt 44 is connected to the threaded hole 43. The locking bolt 44 is used to abut the welding head 3 against the connecting rod 42. When the welding head 3 is replaced, the locking bolt 44 is removed to take the welding head 3 off the mounting rod 4, the mounting rod 4 is then inserted into the new welding head 3, and finally the locking bolt 44 is screwed into the threaded hole 43 so that the welding head 3 abuts between the connecting rod 42 and the locking bolt 44. The welding head 3 has a first welding tooth 31 on its left end, a second welding tooth 32 on its right end, a third welding tooth 33 on its top end, and a fourth welding tooth 34 on its bottom end. By driving the rotating shaft 7 to rotate, the first welding tooth 31, the second welding tooth 32, the third welding tooth 33, and the fourth welding tooth 34 are respectively positioned opposite to the welding seat 1. The welding areas of the first welding tooth 31 and the second welding tooth 32 are the same, and the welding areas of the third welding tooth 33 and the fourth welding tooth 34 are the same. Furthermore, the welding areas of the first welding tooth 31 and the second welding tooth 32 are both smaller than the welding areas of the third welding tooth 33 and the fourth welding tooth 34. The first welding tooth 31 and the second welding tooth 32 are used for pressing and welding multi-layer tab foils with high overlap; the third welding tooth 33 and the fourth welding tooth 34 are used for pressing and welding multi-layer tab foils with low overlap. When the first welding tooth 31 wears down, the welding head 3 is flipped so that the second welding tooth 32 can continue to face the welding seat 1, achieving the effect of pressing and welding multi-layer tab foils; when the third welding tooth 33 wears down, the welding head 3 is flipped so that the fourth welding tooth 34 can continue to face the welding seat 1, achieving the effect of pressing and welding multi-layer tab foils, thus extending the service life of the welding head 3.

[0038] Reference Figure 5 A lifting guide hole 631 is formed through the lifting seat 62, and a lifting guide rod 63 is inserted into the lifting guide hole 631. The top end of the lifting guide rod 63 is welded to the lifting bracket 6, and the bottom end of the lifting guide rod 63 is welded to the base 5. The lifting guide rod 63 provides support for the lifting bracket 6 and allows the lifting seat 62 to move along the lifting guide rod 63.

[0039] Reference Figures 6 to 8The positioning assembly 8 includes a positioning plate 81 and a positioning rod 82. The positioning plate 81 is mounted on the end of the rotating shaft 7 away from the ultrasonic transducer 2. A positioning hole 811 is formed through the positioning plate 81, and an internal threaded groove 812 is formed on the inner wall of the positioning hole 811. The positioning rod 82 is inserted into the positioning hole 811, and an external threaded groove 821 is formed on the outer wall of the positioning rod 82. The internal threaded groove 812 and the external threaded groove 821 cooperate with each other to make the positioning rod 82 threadedly connected to the positioning hole 811, reducing the possibility of the positioning rod 82 falling out of the positioning hole 811. The lifting seat 62 has a first positioning groove 621, a second positioning groove 622, a third positioning groove 623, and a fourth positioning groove 624 on the side away from the ultrasonic transducer 2. The first positioning groove 621, the second positioning groove 622, the third positioning groove 623, and the fourth positioning groove 624 are for the positioning rod 82 to be inserted. The rotating shaft 7 rotates, causing the positioning plate 81 to rotate. When the rotating shaft 7 rotates to the appropriate position, the positioning rod 82 is inserted into the first positioning groove 621, the second positioning groove 622, the third positioning groove 623, or the fourth positioning groove 624 at the end facing the lifting seat 62, so that the positioning plate 81 and the lifting seat 62 remain relatively stationary, thus achieving the effect of keeping the rotating shaft 7 and the lifting seat 62 relatively stationary.

[0040] refer to Figure 3 and Figure 9 A movable groove 51 is provided on the base 5, and a movable seat 52 is slidably disposed in the movable groove 51. The movable seat 52 is fixedly connected to the welding seat 1. A movable screw 53 is rotatably disposed in the movable groove 51, and the movable screw 53 is threadedly connected to the movable seat 52. The rotation of the movable screw 53 drives the movable seat 52 to move along the movable groove 51, and the movement of the movable seat 52 drives the welding seat 1 to move, thereby achieving the effect of adjusting the relative position of the welding head 3 and the welding seat 1.

[0041] The implementation principle of the ultrasonic welding device for electrode tabs in this application embodiment is as follows: When the welding head 3 is replaced, the locking bolt 44 is removed to take the welding head 3 off the mounting rod 4, the mounting rod 4 is then inserted into the new welding head 3, and finally the locking bolt 44 is screwed into the threaded hole 43, so that the welding head 3 abuts between the connecting rod 42 and the locking bolt 44. The first welding tooth 31 and the second welding tooth 32 are used for pressing and welding multi-layer electrode tab foils with high overlap; the third welding tooth 33 and the fourth welding tooth 34 are used for pressing and welding multi-layer electrode tab foils with low overlap. By driving the rotating shaft 7 to rotate, the first welding tooth 31, the second welding tooth 32, the third welding tooth 33 and the fourth welding tooth 34 are respectively arranged opposite to the welding seat 1. When the first welding tooth 31 wears out, the welding head 3 is flipped so that the second welding tooth 32 can continue to face the welding seat 1, thus achieving the effect of pressing and welding the multi-layer electrode foil; when the third welding tooth 33 wears out, the welding head 3 is flipped so that the fourth welding tooth 34 can continue to face the welding seat 1, thus achieving the effect of pressing and welding the multi-layer electrode foil and extending the service life of the welding head 3.

[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A tab ultrasonic welding apparatus comprising an ultrasonic transducer, an amplitude modifier, a horn and an anvil, the amplitude modifier being disposed on the ultrasonic transducer, characterised in that: The welding head has a first welding tooth on its left end, a second welding tooth on its right end, a third welding tooth on its top end, and a fourth welding tooth on its bottom end. The first, second, third, and fourth welding teeth are all positioned opposite the welding base. The welding head has several mounting holes that penetrate the front and rear sidewalls of the welding head. A mounting rod is inserted into each mounting hole. One end of each mounting rod has a connecting rod that connects to the amplitude modulator. The other end of each mounting rod has a threaded hole into which a locking bolt is threaded. The locking bolt is used to abut the welding head against the connecting rod.

2. The ultrasonic welding device for electrodes according to claim 1, characterized in that: The welding base is provided at the bottom, and a lifting bracket is fixedly provided on the base. A lifting seat is slidably provided on the lifting bracket, and the lifting seat is rotatably connected to the ultrasonic transducer.

3. The tab ultrasonic welding apparatus of claim 2, wherein: A piston cylinder is fixedly installed on the lifting bracket, and the output shaft of the piston cylinder is fixedly connected to the lifting seat.

4. The tab ultrasonic welding apparatus of claim 2, wherein: A lifting guide hole is formed through the lifting base, and a lifting guide rod is inserted into the lifting guide hole. The top end of the lifting guide rod is fixedly connected to the lifting bracket, and the bottom end of the lifting guide rod is fixedly connected to the base.

5. The tab ultrasonic welding apparatus of claim 2, wherein: A rotating hole is formed through the lifting base, and a rotating shaft is inserted into the rotating hole. The rotating shaft is rotatably connected to the rotating hole. One end of the rotating shaft is fixedly connected to an ultrasonic transducer, and a positioning component is provided at the other end of the rotating shaft. The positioning component is used to keep the rotating shaft and the lifting base relatively stationary.

6. The tab ultrasonic welding apparatus of claim 5, wherein: The positioning assembly includes a positioning plate and a positioning rod. The positioning plate is fixedly mounted on the end of the rotating shaft away from the ultrasonic transducer. A positioning hole is opened on the positioning plate, and the positioning rod is inserted into the positioning hole. A first positioning groove, a second positioning groove, a third positioning groove, and a fourth positioning groove are opened on the side of the lifting seat away from the ultrasonic transducer. The first positioning groove, the second positioning groove, the third positioning groove, and the fourth positioning groove are for the positioning rod to be inserted.

7. The tab ultrasonic welding apparatus of claim 6, wherein: The inner wall of the positioning hole has an internal thread groove, and the outer wall of the positioning rod has an external thread groove. The internal thread groove and the external thread groove cooperate with each other, and the positioning rod is threadedly connected to the positioning hole.

8. The tab ultrasonic welding apparatus of claim 2, wherein: A movable groove is provided on the base, and a movable seat is slidably arranged in the movable groove. The movable seat is fixedly connected to the welding seat. A movable lead screw is rotatably arranged in the movable groove, and the movable lead screw is threadedly connected to the movable seat.

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