Collecting device for ultrasonic welding and ultrasonic welding machine

Abstract

The utility model discloses a collecting device for ultrasonic welding and an ultrasonic welding machine, the collecting device comprises a hollow collecting plate, mounting plates are arranged on two sides of the collecting plate, moving rails matched with the collecting plate are mounted on the mounting plates, and a driving mechanism for lifting the collecting plate is arranged on the collecting plate; a welding seat is arranged below the hollow area of the bundling plate, and a rack is arranged at the bottom of the welding seat. The alignment mechanism, the driving mechanism and the traction mechanism are matched, a metal sheet is placed on the welding seat and pressed by the binding plate, the binding plate is pressed downwards to limit a tab through a contact coating during welding, the welding head is in contact with the tab through a hollow part in the middle of the binding plate to complete welding, and the adopted welding binding device has a vibration reduction function and is convenient to use. The application of weakening and eliminating useless and even harmful vibration parts of ultrasonic welding is realized; the probability that dust in the welding environment enters the battery cell through dust removal air can be reduced, so that the short circuit probability is reduced, and the production loss is reduced.

Description

Technical Field

[0001] This utility model relates to the field of welding technology, and in particular to a beam-gathering device and an ultrasonic welding machine for ultrasonic welding. Background Technology

[0002] Ultrasonic metal welding machines are advanced high-tech equipment that convert high-frequency electrical energy into mechanical vibration energy through a transducer and apply it to the workpiece, generating high-frequency friction between the two workpiece surfaces until the two workpiece surfaces heat up and fuse together.

[0003] Lithium-ion batteries typically use copper foil as the negative electrode tab material, with a thickness of approximately 4-15 μm per sheet. The number of tabs per cell varies depending on the capacity, generally ranging from 30 to 100. Aluminum foil is used as the positive electrode tab material, with a thickness of approximately 10-20 μm per sheet. The number of tabs per cell also varies depending on the capacity, generally ranging from 30 to 100. These negative or positive electrode tabs are welded together and called a tab bundle. The general welding process is as follows: First, the two metal pieces (tabs) to be welded are clamped between the welding head and the welding base. After the workpiece is positioned, the welding head descends to press the workpiece. When the welding machine reaches the set clamping force (i.e., triggering force), the welding head will emit ultrasonic waves. The high-frequency vibration waves are transmitted along the welding head to the surface of the upper metal piece. The welding head drives the upper metal piece to vibrate at high frequency, and the welding base supports the lower metal piece, thereby generating high-frequency friction between the contact surfaces of the two metal pieces and generating heat, which melts the contact surface. After the workpiece cools down, the two metal workpieces are joined together. Finally, the welding head is lifted, and the welding is completed.

[0004] Currently, existing ultrasonic welding machines lack effective protection for the electrode tabs. The nature of ultrasonic welding inherently generates vibrations during the process. While the energy from these vibrations ensures welding completion, it poses a threat to the electrode tabs located outside the welding area. Electrodes on the outer layer of a electrode bundle, lacking effective means to eliminate vibration, are prone to breakage, causing production losses. Furthermore, ultrasonic welding inevitably generates metal dust. Existing dust removal equipment primarily uses blowers to remove dust and debris, but dust and metal debris can potentially enter the battery cell through loose electrode tabs, potentially puncturing the electrode plates and causing short circuits during subsequent circuit testing. Utility Model Content

[0005] The technical problem to be solved by this utility model is to address the shortcomings of the prior art by providing a gathering device and an ultrasonic welding machine for ultrasonic welding, so as to reduce the vibration parts that are useless or even harmful to ultrasonic welding, reduce the probability of dust in the welding environment entering the battery cell through the dust removal air, thereby reducing the probability of short circuit and reducing production losses.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] An ultrasonic welding beam-gathering device includes a beam-gathering plate with perforations. Mounting plates are arranged on both sides of the beam-gathering plate, and a moving track that cooperates with the beam-gathering plate is mounted on the mounting plates. A drive mechanism for raising and lowering the beam-gathering plate is provided on the beam-gathering plate. A welding seat is provided below the perforated area of ​​the beam-gathering plate, and a frame is provided at the bottom of the welding seat. The welding seat and the frame move horizontally on a level plane through an alignment mechanism. A welding head is provided above the perforated area of ​​the beam-gathering plate, and the welding head and the frame are raised and lowered vertically through a traction mechanism.

[0008] The metal sheets are pressed together by a convergence plate and a welding socket. During welding, the convergence plate presses down and limits the electrode tabs through the contact coating, reducing the gap between the metal sheets and allowing them to fit together. The welding head completes the welding through the hollow contact electrode tab in the middle of the convergence plate. This has a vibration reduction function, realizing the weakening and elimination of the useless or even harmful vibration parts of ultrasonic welding. During welding, the convergence plate presses down and limits the electrode tabs through the contact coating, and the welding head completes the welding through the hollow contact electrode tab in the middle of the convergence plate.

[0009] Preferably, the two mounting plates are installed in parallel on both sides of the frame, and the mounting plates are fixed to the frame by bolts.

[0010] The number of moving tracks is set to four, and the four moving tracks are fixed symmetrically on one side of the two mounting plates. The two sides of the converging plate are provided with four grooves, and the four grooves correspond one-to-one with the four moving tracks and slide in fit. Limiting plates are fixedly connected to the converging plate at the positions of the corresponding grooves.

[0011] Preferably, the driving mechanism includes a first driving motor, a gear, and a rack, and the number of the first driving motor, the gear, and the rack is set to two. The two first driving motors are fixed symmetrically on the converging plate. The output shaft of the first driving motor is connected to the gear. The two racks are embedded in the same set of moving track sides, and the two gears correspond one-to-one with the two racks and mesh with each other for transmission.

[0012] Preferably, the frame includes a crossbeam and a longitudinal beam, and the crossbeam and the longitudinal beam are integrally arranged perpendicularly. The upper surface of the crossbeam is provided with a movable groove, and a C-shaped rail is slidably arranged in the movable groove. The welding seat is slidably connected to the top of the inner side of the C-shaped rail.

[0013] Preferably, the aiming mechanism includes a first electric push rod and a second electric push rod, which are arranged perpendicularly to each other.

[0014] The first electric push rod is fixed on the crossbeam, and the output end of the first electric push rod extends through to the inside of the movable groove and is connected to the C-shaped rail via a transmission. The second electric push rod is fixed to the end of the C-shaped rail, and the output end of the second electric push rod is connected to the welding seat via a transmission.

[0015] Preferably, a transverse groove runs through the longitudinal beam, and the second electric push rod slides within the transverse groove.

[0016] Preferably, the traction mechanism includes a traction block and a lead screw. A vertical groove runs through the longitudinal beam, and the lead screw is rotatably connected in the vertical groove. The traction block is vertically slidably connected in the vertical groove, and the lead screw passes through the traction block and is threaded into the through hole. A second drive motor is fixedly connected to the top of the longitudinal beam, and the output shaft of the second drive motor is drivenly connected to the top of the lead screw.

[0017] Preferably, the edge of the hollowed-out area of ​​the gathering plate is provided with a contact coating for contacting the gathering tab, and the contact coating is made of ceramic material.

[0018] An ultrasonic welding machine includes a convergence device, wherein the connection end of the welding head is provided with an ultrasonic welding machine, and the ultrasonic welding machine is mounted on a traction block.

[0019] This utility model has the following beneficial effects:

[0020] By coordinating the positioning, driving, and traction mechanisms, the metal sheets are placed on the welding base and pressed tightly by the gathering plate. During welding, the gathering plate presses down through the contact coating to limit the tabs, reducing the gap between the metal sheets and allowing them to fit together. The welding head completes the welding through the hollow contact tab in the middle of the gathering plate. The welding gathering device has a vibration reduction function, which reduces and eliminates the useless or even harmful vibrations in ultrasonic welding. It can reduce the probability of dust in the welding environment entering the battery cell through the dust removal air, thereby reducing the probability of short circuits and reducing production losses. Attached Figure Description

[0021] Figure 1 This is a first-view perspective perspective view of the overall structure of the ultrasonic welding beam-gathering device provided by this utility model.

[0022] Figure 2 This is a second-view perspective perspective view of the overall structure of the ultrasonic welding beam-gathering device provided by this utility model.

[0023] Figure 3 This is a front view of the ultrasonic welding gathering device provided by this utility model.

[0024] Figure 4 This is a top view of the ultrasonic welding gathering device provided by this utility model.

[0025] Figure 5This is a utility model Figure 1 The cross-sectional three-dimensional view of the structure shown.

[0026] Figure 6 This is a utility model Figure 5 Top view of the structure shown.

[0027] Among them are:

[0028] Welding head-1; Welding base-2; Moving track-3; Converging plate-4; Mounting plate-5; Contact coating-6; Frame-7; Bolt-8; Limiting plate-9; First drive motor-10; Gear-11; Rack-12; Movable groove-13; C-shaped rail-14; First electric push rod-15; Second electric push rod-16; Horizontal groove-17; Vertical groove-18; Lead screw-19; Traction block-20; Second drive motor-21; Ultrasonic welding machine-22. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and specific preferred embodiments.

[0030] In the description of this utility model, it should be understood that the terms "left side," "right side," "upper part," "lower part," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. "First," "second," etc., do not indicate the importance of the components, and therefore should not be construed as a limitation of this utility model. The specific dimensions used in this embodiment are only for illustrating the technical solution and do not limit the protection scope of this utility model.

[0031] like Figure 1-6 As shown, an ultrasonic welding beam-gathering device includes a beam-gathering plate 4 with a perforation. In this embodiment, the perforation is located in the middle of the beam-gathering plate 4 and extends through the beam-gathering plate 4. Mounting plates 5 are arranged on both sides of the beam-gathering plate 4, and a moving track 3 that cooperates with the beam-gathering plate 4 is mounted on the mounting plates 5. A driving mechanism for lifting and lowering the beam-gathering plate 4 is provided on the beam-gathering plate 4.

[0032] A welding seat 2 is provided below the hollow area of ​​the gathering plate 4. A frame 7 is provided at the bottom of the welding seat 2, and the welding seat 2 and the frame 7 move on the horizontal plane through a positioning mechanism.

[0033] A welding head 1 is positioned above the hollowed-out area of ​​the gathering plate 4, and the welding head 1 can pass through the hollowed-out area of ​​the gathering plate 4. The welding head 1 and the frame 7 are vertically raised and lowered by a traction mechanism.

[0034] Specifically, in the above technical solution, two mounting plates 5 are embedded in parallel on both sides of the frame 7, and the mounting plates 5 and the frame 7 are fixed together by bolts 8;

[0035] The number of moving tracks 3 is set to four. The four moving tracks 3 are fixed symmetrically on one side of the two mounting plates 5. The two sides of the converging plate 4 are provided with four grooves, and the four grooves correspond one-to-one with the four moving tracks 3 and slide in fit. The converging plate 4 is fixedly connected to the corresponding groove position.

[0036] Specifically, in the above technical solution, the driving mechanism includes a first driving motor 10, a gear 11, and a rack 12, and the number of the first driving motor 10, gear 11, and rack 12 is set to two. The two first driving motors 10 are fixed symmetrically on the converging plate 4. The output shaft of the first driving motor 10 is connected to the gear 11 for transmission. The two racks 12 are embedded on the side of the same set of moving tracks 3, and the two gears 11 and the two racks 12 correspond one-to-one and mesh for transmission.

[0037] Specifically, in the above technical solution, the frame 7 includes a crossbeam and a longitudinal beam, and the crossbeam and the longitudinal beam are integrally set in a vertical position. The upper surface of the crossbeam is provided with a movable groove 13, and a C-shaped rail 14 is slidably arranged in the movable groove 13. The welding seat 2 is slidably connected to the top of the inner side of the C-shaped rail 14.

[0038] Specifically, in the above technical solution, the locating mechanism includes a first electric push rod 15 and a second electric push rod 16, with the first electric push rod 15 and the second electric push rod 16 being distributed perpendicularly.

[0039] The first electric push rod 15 is fixed on the crossbeam, and the output end of the first electric push rod 15 passes through the inner side of the movable groove 13 and is connected to the C-shaped rail 14 in a transmission manner. The second electric push rod 16 is fixed on the end of the C-shaped rail 14, and the output end of the second electric push rod 16 is connected to the welding seat 2 in a transmission manner.

[0040] Specifically, in the above technical solution, a transverse groove 17 runs through the longitudinal beam, and the second electric push rod 16 slides within the transverse groove 17.

[0041] Specifically, in the above technical solution, the traction mechanism includes a traction block 20 and a lead screw 19. A vertical groove 18 is passed through the longitudinal beam. The lead screw 19 is rotatably connected in the vertical groove 18. The traction block 20 is vertically slidably connected in the vertical groove 18. The lead screw 19 passes through the traction block 20 and is threadedly engaged with the through hole. A second drive motor 21 is fixedly connected to the top of the longitudinal beam. The output shaft of the second drive motor 21 is connected to the top of the lead screw 19 for transmission.

[0042] Specifically, in the above technical solution, the edge of the hollowed-out area of ​​the convergence plate 4 is provided with a contact coating 6 for contacting the convergence tabs, and the contact coating is made of ceramic material. Alternatively, other smoother materials can be used instead.

[0043] An ultrasonic welding machine includes a gathering device, an ultrasonic welding machine 22 is provided at the connecting end of the welding head 1, and the ultrasonic welding machine 22 is mounted on the traction block 20.

[0044] The steps for welding the tab bundle using this device are as follows:

[0045] S1. Place at least two metal sheets to be welded on top of the welding base 2 after stacking them together;

[0046] S2. By adjusting the position of the welding seat 2 through the positioning mechanism, and according to the position of the hollow area and the welding head 1, control the first electric push rod 15 and the second electric push rod 16 so that the area to be welded of the metal sheet is located directly below the welding head 1.

[0047] S3. Adjust the height of the gathering plate 4 through the drive mechanism. According to the thickness of the metal sheet, control the first drive motor 10 to work, so that its output shaft drives the gear 11. Under the meshing action of the rack 12, the gathering plate 4 moves downward and presses against the top of the metal sheet. Then the first drive motor 10 stops working and the gathering plate 4 is locked in this position.

[0048] S4. Adjust the height of the welding head 1 and the ultrasonic welding machine 22 through the traction mechanism, control the second drive motor 21 to work, so that its output shaft drives the lead screw 19 and moves the traction block 20 further downward, bringing the welding head 1 and the ultrasonic welding machine 22 downward until the welding head 1 passes through the hollow area and contacts the metal sheet, so as to reduce the gap between the metal sheets and make the metal sheets fit together.

[0049] S5. Start the ultrasonic welding machine 22, so that the welding head 1 drives the upper metal plate to vibrate at high frequency, and the welding seat 2 supports the lower metal plate, thereby generating heat through high-frequency friction between the contact surfaces of multiple metal plates, which melts the contact surfaces; after the workpiece cools down, the two metal workpieces are joined together; finally, the welding head is lifted, and the welding is completed.

[0050] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. An ultrasonic welding horn characterized by: Including with hollowed out the convergence board (4), the convergence board (4) both sides are equipped with mounting plate (5), and mounting plate (5) is installed with the mobile track (3) that cooperates with convergence board (4), the convergence board (4) is provided with the drive mechanism of lifting convergence board (4); Welding seat (2) is arranged below the hollowed out area of convergence board (4), the bottom of welding seat (2) is provided with rack (7), and welding seat (2) and rack (7) move on horizontal plane through locating mechanism; Welding head (1) is arranged above the hollowed out area of convergence board (4), and welding head (1) and rack (7) are vertically lifted through traction mechanism.

2. A horn assembly for ultrasonic welding as defined in claim 1, wherein: Two mounting plates (5) are embedded in parallel on both sides of rack (7), and mounting plate (5) and rack (7) are combined and fixed by bolts (8). The number of mobile tracks (3) is four, and the four mobile tracks (3) are fixed on the opposite side of the two mounting plates (5) in axial symmetry, the convergence board (4) is provided with four recesses on both sides, and the four recesses correspond to the four mobile tracks (3) and are in sliding cooperation, and the limiting plate (9) is fixedly connected to the position corresponding to the recess on the convergence board (4).

3. A horn assembly for ultrasonic welding as defined in claim 2, wherein: The drive mechanism includes first drive motor (10), gear (11) and rack (12), and the number of first drive motor (10), gear (11) and rack (12) is two, two first drive motors (10) are fixed on convergence board (4) in symmetry, the output shaft of first drive motor (10) is connected with gear (11), two racks (12) are embedded on the side of the same group of mobile tracks (3), and two gears (11) correspond to two racks (12) and are in meshing transmission.

4. A horn assembly for ultrasonic welding as defined in claim 3, wherein: The edge of the hollowed out area of the convergence board (4) is provided with a contact coating (6) for contacting the convergence tab, and the contact coating is made of ceramic material.

5. A horn assembly for ultrasonic welding as defined in claim 4, wherein: The rack (7) includes a cross beam and a longitudinal beam, and the cross beam and the longitudinal beam are integrally arranged in a vertical manner, the upper surface of the cross beam is provided with a movable groove (13), and a U-shaped rail (14) is slidably arranged in the movable groove (13), and the welding seat (2) is slidably connected to the inner top of the U-shaped rail (14).

6. A horn assembly for ultrasonic welding as defined in claim 5, wherein: The locating mechanism includes first electric push rod (15) and second electric push rod (16), and the first electric push rod (15) and the second electric push rod (16) are distributed in a vertical manner. The first electric push rod (15) is fixed on the cross beam, and the output end of the first electric push rod (15) penetrates into the inner side of the movable groove (13) and is in transmission connection with the U-shaped rail (14), and the second electric push rod (16) is fixed on the end of the U-shaped rail (14), and the output end of the second electric push rod (16) is in transmission connection with the welding seat (2).

7. A horn assembly for ultrasonic welding as defined in claim 6, wherein: The longitudinal beam is penetrated by a horizontal groove (17), and the second electric push rod (16) is in sliding cooperation in the horizontal groove (17).

8. A horn assembly for ultrasonic welding as defined in claim 7, wherein: The traction mechanism comprises a traction block (20) and a screw rod (19), a vertical slot (18) is formed through the longitudinal beam, the screw rod (19) is rotationally connected in the vertical slot (18), the traction block (20) is vertically and slidingly connected in the vertical slot (18), and the screw rod (19) penetrates through the traction block (20) and is threadedly connected with the penetrating hole.

9. An ultrasonic welding machine comprising the horn assembly of claim 8, characterized in that: The connecting end of the welding head (1) is provided with an ultrasonic welding machine (22), and the ultrasonic welding machine (22) is installed on the traction block (20).

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