An ultrasonic welding module

Abstract

This invention relates to an ultrasonic welding module, comprising: a conveying channel, 4N ultrasonic welding machines, and a fixture capable of moving along the conveying channel. The fixture has N cell positions for placing battery cells, where N ≥ 1. The 4N ultrasonic welding machines are symmetrically distributed on opposite sides of the conveying channel. Each ultrasonic welding machine includes a lifting driver and a welding mechanism for welding the tabs. The output end of each lifting driver is connected to a welding mechanism. Each pair of ultrasonic welding machines symmetrically distributed on opposite sides of the conveying channel forms a group. The positive and negative tabs of each battery cell produce a first weld mark in one group, and the positive and negative tabs of the battery cell produce a second weld mark in the adjacent other group. That is, two groups of ultrasonic welding machines on the conveying channel can complete two weld marks for one battery cell. This is suitable for welding blade batteries, with a more rational welding layout, effectively shortening the fixture's transit time and significantly improving welding efficiency.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and more specifically, to an ultrasonic welding module. Background Technology

[0002] Power batteries have a very broad prospect in the field of power energy. In order to meet the production needs of power batteries, one of the more common methods used in the market is ultrasonic welding. Ultrasonic welding 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] The existing ultrasonic welding mechanism on the pre-welding machine includes a positive electrode welding device and a negative electrode welding device. It is necessary to go through two stations in sequence to complete the welding of the positive electrode tab and the negative electrode tab of the battery cell. However, this station setting is not suitable for blade batteries with the tabs on opposite sides. The station of fixture flow is longer, and only one battery cell can be welded at a time, resulting in low processing efficiency.

[0004] Furthermore, in current ultrasonic welding techniques, the electrode tabs may be curled or bent to varying degrees during welding. When welding the electrode tabs, they are in a rather messy state, which can lead to poor welding results. Summary of the Invention

[0005] This invention overcomes the problems described in the background section regarding the ultrasonic welding mechanism on existing pre-welding machines, which includes a positive electrode welding device and a negative electrode welding device. These mechanisms require two sequential stations to complete the welding of the positive and negative electrode tabs of the battery cell. However, this station setup is unsuitable for blade batteries with tabs on opposite sides, results in longer fixture transfer stations, and only allows welding of one battery cell at a time, leading to low processing efficiency. Therefore, this invention provides an ultrasonic welding module.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] An ultrasonic welding module includes: a conveying channel, 4N ultrasonic welding machines, and a fixture that can move along the conveying channel. The fixture is provided with N battery cell positions for placing battery cells, where N≥1. The 4N ultrasonic welding machines are symmetrically distributed on opposite sides of the conveying channel.

[0008] The ultrasonic welding machine includes a lifting driver and a welding mechanism for welding electrodes, with the output end of the lifting driver connected to the welding mechanism.

[0009] In one embodiment, N=2.

[0010] To address the problem described in the background art where welding electrodes in a disordered state leads to poor welding, one embodiment of the welding mechanism includes a welding machine mounting base, a lower welding seat for abutting the lower surface of the electrodes, a welding machine body mounted on the welding machine mounting base, and a pressure electrode assembly for smoothing the electrodes on the lower welding seat. A lifting driver is driven to the welding machine mounting base. The welding machine body is mounted on the welding machine mounting base, the lower welding seat is mounted on the welding machine body, and the pressure electrode assembly is mounted on the welding machine body.

[0011] In one embodiment, the electrode assembly includes an electrode clamping block and an electrode driver, the electrode driver being disposed on the welding machine body, and the electrode clamping block being connected to the output terminal of the electrode driver.

[0012] In one embodiment, the tab block has an L-shaped cross-section, with one end of the tab block movably abutting against the upper surface of the battery cell, and the other end of the tab block movably abutting against the tab on the battery cell.

[0013] In one embodiment, the welding machine body is detachably connected to the welding machine mounting base.

[0014] In one embodiment, the welding machine mounting base includes a mounting frame for mounting the welding machine body, a lifting frame for sliding up and down within the mounting frame, a plurality of ball bearing rollers mounted on the top surface of the lifting frame, and a ball bearing driver for driving the lifting frame to slide up and down within the mounting frame. The mounting frame is detachably connected to the welding machine body. The top surface of the mounting frame has a plurality of through holes. The output end of the ball bearing driver is connected to the lifting frame. The ball bearing rollers are rotatably mounted on the lifting frame, and the top of the ball bearing rollers protrudes movably from the through holes at one end near the welding machine body.

[0015] In one embodiment, the welding machine body includes a housing, a welding head, and a welding actuator for driving the welding head closer to or away from the electrode tab. The housing is connected to the mounting bracket, the welding actuator is disposed on the housing, the welding actuator is drivenly connected to the welding head, and the welding head is disposed opposite to the lower welding seat.

[0016] In one embodiment, the housing is provided with a dust removal mechanism for removing dust generated during welding.

[0017] In one embodiment, the housing is provided with a proximity sensor for detecting the tabs.

[0018] Compared to existing technologies, the advantages are as follows: By placing N battery cells on the fixture, 4N corresponding ultrasonic welding machines are set up. Each pair of ultrasonic welding machines, symmetrically distributed on opposite sides of the conveyor channel, forms a group. The positive and negative electrodes of each battery cell produce the first weld mark in one group. The fixture continues to move forward within the conveyor channel until the positive and negative electrodes of the same battery cell produce the second weld mark in an adjacent group. In other words, every two groups of ultrasonic welding machines on the conveyor channel can complete two weld marks for one battery cell. This is suitable for welding blade batteries with electrodes on opposite sides, resulting in a more rational welding layout, effectively shortening the fixture's transit time, and significantly improving welding efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the ultrasonic welding module.

[0020] Figure 2 This is a schematic diagram of the overall structure of an ultrasonic welding machine;

[0021] Figure 3 yes Figure 2 A magnified schematic diagram of the structure at point A;

[0022] Figure 4 This is a structural diagram of an ultrasonic welding machine in its disassembled state;

[0023] Figure 5 This is a schematic diagram of the structure of the electrode tab pressure block in an ultrasonic welding machine.

[0024] 10. Ultrasonic welding machine; 20. Ultrasonic welding module; 100. Welding machine mounting base; 110. Steel ball roller; 120. Mounting frame; 130. Lifting frame; 200. Welding machine body; 210. Lower welding seat; 220. Electrode clamping block; 221. Connecting plate; 222. Pressing plate; 230. Electrode driver; 240. Welding driver; 250. Welding head; 300. Lifting driver; 400. Proximity sensor; 500. Dust removal mechanism; 600. Pull ring; 700. Conveying channel. Detailed Implementation

[0025] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable that some well-known structures and their descriptions may be omitted in the drawings for those skilled in the art. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent. Furthermore, it should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0026] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit this application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The same or similar reference numerals in the drawings of the embodiments of this invention correspond to the same or similar components; in the description of this invention, it should be understood that if terms such as "upper," "lower," "left," "right," "long," "short," etc., indicate orientation or positional relationships based on the orientation or positional relationships shown in the drawings, they are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the drawings are for illustrative purposes only and should not be construed as limiting this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0027] Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range. In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "connected," "attached," and "attached" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. In the description of the embodiments of this application, the technical terms "thickness," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of this application 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, and therefore should not be construed as a limitation on the embodiments of this application.

[0028] The technical solution of the present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] Example 1

[0030] like Figure 1 and Figure 2 As shown, an ultrasonic welding module 20 includes: a conveying channel 700, 4N ultrasonic welding machines 10, and a fixture that can move along the conveying channel 700. The fixture has N battery cell positions for placing battery cells, where N ≥ 1. The 4N ultrasonic welding machines 10 are symmetrically distributed on opposite sides of the conveying channel 700. Each ultrasonic welding machine 10 includes a lifting driver 300 and a welding mechanism for welding electrode tabs. The output end of the lifting driver 300 is connected to the welding mechanism.

[0031] Specifically, the lifting driver 300 is mounted on the external support plate and is connected to the welding mechanism. Since the height of the battery cell is fixed, the electrode tab is suspended in mid-air, meaning it hangs freely under gravity. The lifting driver 300 drives the welding mechanism upwards, bringing the welding portion of the welding mechanism closer to the electrode tab, thus facilitating welding. The lifting driver 300 is a motor, and the method by which the motor drives the welding mechanism upwards is known to those skilled in the art and is feasible; therefore, it will not be described in detail in this embodiment.

[0032] When N=1, there are four ultrasonic welding machines 10. The fixture has a designated space for placing the battery cell. The four ultrasonic welding machines 10 are symmetrically distributed on opposite sides of the conveyor track. Thus, each pair of ultrasonic welding machines 10 forms a group. One group of oppositely positioned ultrasonic welding machines 10 welds the positive and negative tabs of the battery cell, completing the first weld mark. As the fixture continues to move forward along the conveyor channel 700, another group of oppositely positioned ultrasonic welding machines 10 welds the positive and negative tabs of the battery cell, completing the second weld mark. This allows for simultaneous automatic welding of the positive and negative tabs of the battery cell.

[0033] When N=2, there are 8 ultrasonic welding machines 10. The fixture has two cell placement positions, and the 8 ultrasonic welding machines 10 are symmetrically distributed on opposite sides of the conveyor track. Thus, each pair of opposite ultrasonic welding machines 10 forms a group, and the fixture sequentially transports the cells from the first group to the fourth group on the conveyor track, completing the welding process. First, the first group completes the first weld on the positive and negative tabs of the first cell. The fixture continues moving until the second group completes the second weld on the positive and negative tabs of the first cell, thus completing a double weld on the positive and negative tabs. The fixture continues moving forward until it reaches the third group, where the first weld on the positive and negative tabs of the second cell is completed. The fixture continues moving forward until the fourth group completes the second weld on the positive and negative tabs of the second cell, thus completing a double weld on the positive and negative tabs. This completes the welding process of the entire ultrasonic welding module 20. In this way, the ultrasonic welding module 20 can process two battery cells simultaneously, effectively improving welding efficiency.

[0034] It is worth noting that by placing N battery cells on the fixture, 4N ultrasonic welding machines 10 are correspondingly set up. Each group consists of two ultrasonic welding machines 10 symmetrically distributed on opposite sides of the conveyor channel 700. Each pair of ultrasonic welding machines 10 on the conveyor channel 700 can complete two weld marks on one battery cell. This is more suitable for welding blade batteries with tabs on opposite sides and effectively shortens the fixture's transit time. While ensuring that each battery cell has two weld marks on both the positive and negative tabs, the welding layout is more rational, effectively improving welding efficiency.

[0035] To facilitate welding using ultrasonic welding machines, such as Figure 2 and Figure 3 As shown, in this embodiment, the welding mechanism includes a welding machine mounting base 100, a lower welding seat 210 for abutting the lower surface of the electrode tab, a welding machine body 200 disposed on the welding machine mounting base 100, and a pressure electrode tab assembly for smoothing the electrode tab on the lower welding seat 210. The lifting driver 300 is drivenly connected to the welding machine mounting base 100. The welding machine body 200 is disposed on the welding machine mounting base 100, the lower welding seat 210 is disposed on the welding machine body 200, and the pressure electrode tab assembly is disposed on the welding machine body 200.

[0036] Specifically, the welding machine mounting base 100 is used to mount the welding machine body 200. The bottom of the welding machine body 200 is connected to the top of the welding machine mounting base 100, and the lower welding seat 210 is set on the bottom surface of the welding machine body 200. The battery cell arrives above the lower welding seat 210 via a transport track. Since the height of the battery cell is fixed, the electrode tab is suspended in the air, meaning it hangs freely under gravity. The lifting driver 300 drives the welding machine mounting base 100 to move upward, causing the welding machine body 200 to move upward as well. This allows the lower welding seat 210 on the welding machine body 200 to contact the lower surface of the electrode tab, thus providing a supportive fit and restoring the electrode tab to a horizontal position, ensuring its flatness to a certain extent. Furthermore, the electrode tab pressing assembly contacts the upper surface of the electrode tab, pressing down and smoothing it, further ensuring its flatness. In this way, by pressing down and supporting the upper and lower surfaces of the electrode respectively, the electrode remains flat when it is welded on the welding machine body 200, thereby effectively avoiding welding defects, that is, effectively avoiding energy loss of the battery cell caused by the electrode curling and bending, and thus effectively avoiding the generation of defective products.

[0037] To facilitate the use of the tab-down assembly, such as Figure 5 As shown, in this embodiment, the electrode clamping assembly includes an electrode clamping block 220 and an electrode clamping driver 230. The electrode clamping driver 230 is mounted on the welding machine body 200, and the electrode clamping block 220 is connected to the output end of the electrode clamping driver 230. Specifically, the electrode clamping block 220 is driven downward by the electrode clamping driver 230, allowing it to contact the upper surface of the electrode, thereby pressing down and smoothing the upper surface of the electrode, further ensuring the flatness of the electrode. The electrode clamping driver 230 is configured as a cylinder, and the method of using a cylinder to drive the electrode clamping block 220 to press down on the upper surface of the electrode is known to those skilled in the art and is feasible; therefore, it will not be described in detail in this embodiment.

[0038] To facilitate the pressing of the tab by the tab clamp, such as Figure 5As shown, in this embodiment, the tab pressing block 220 has an L-shaped cross-section, with one end of the tab pressing block 220 movably abutting against the upper surface of the battery cell, and the other end of the tab pressing block 220 movably abutting against the tab on the battery cell. Specifically, the tab pressing block 220 includes a horizontally arranged connecting plate 221 and a pressing plate 222 for movably abutting against the tab. The output end of the tab driver 230 is connected to one end of the connecting plate 221, and one end of the pressing plate 222 is connected to the other end of the connecting plate 221. The height of the pressing plate 222 is adapted to the required thickness of the tab to be pressed down. The pressing plate 222 movably abuts against the upper surface of the tab. The connecting plate 221 is driven by the tab driver 230, so that the connecting plate 221 contacts the upper surface of the battery cell, and the pressing plate 222 presses down on the upper surface of the tab, thereby facilitating the pressing and smoothing effect on the tab.

[0039] To facilitate the use of the tab clamp 220, in this embodiment, as follows: Figure 3 As shown, the edges of the electrode clamping block 220 are rounded. Specifically, by setting the edges of the electrode clamping block 220 to a relatively smooth arc surface, damage to the electrode can be avoided during operation, thus effectively increasing the practicality of the ultrasonic welding machine 10.

[0040] To increase the practicality of ultrasonic welding machines, such as Figure 2 and Figure 4 As shown, in this embodiment, the welding machine body 200 is detachably connected to the welding machine mounting base 100. Specifically, the bottom surface of the welding machine body 200 and the top surface of the welding machine mounting base 100 are detachably connected by means of screw holes and screws. When the welding machine body 200 needs maintenance, it can be removed from the welding machine mounting base 100, thereby facilitating maintenance of the welding machine body 200.

[0041] To facilitate the disassembly and assembly of the ultrasonic welding machine, such as Figures 2 to 4 As shown, in this embodiment, the welding machine mounting base 100 includes a mounting frame 120 for mounting the welding machine body 200, a lifting frame 130 for sliding up and down within the mounting frame 120, a plurality of ball bearing rollers 110 mounted on the top surface of the lifting frame 130, and a ball bearing driver for driving the lifting frame 130 to slide up and down within the mounting frame 120. The mounting frame 120 is detachably connected to the welding machine body 200. The top surface of the mounting frame 120 has a plurality of through holes. The output end of the ball bearing driver is connected to the lifting frame 130. The ball bearing rollers 110 are rotatably mounted on the lifting frame 130, and the top of the ball bearing rollers 110 protrudes from the through holes at one end near the welding machine body 200.

[0042] Specifically, the top surface of the mounting bracket 120 is detachably connected to the bottom surface of the welding machine body 200 by means of screws and screw holes. The bottom of each ball bearing roller 110 is rotatably connected to the top of the lifting frame 130, and the top of each ball bearing roller 110 is movably abutting against the bottom of the welding machine body 200. Each ball bearing roller 110 is spaced apart and evenly arranged on the lifting frame 130, and the shape of each ball bearing roller 110 is adapted to the shape of each through hole. By disconnecting the welding machine body 200 from the mounting frame 120, and then driving the lifting frame 130 to slide upward within the mounting frame 120 via a ball bearing driver, the ball bearing rollers 110 protrude from their respective through holes and lift the welding machine body 200. At this time, the bottom surface of the welding machine body 200 contacts the top surfaces of the multiple ball bearing rollers 110. Through the rolling action of the multiple ball bearing rollers 110, the welding machine body 200 is easily moved and transported, thus facilitating its removal. This effectively improves the practicality of the ultrasonic welding machine 10. The ball bearing driver is configured as a cylinder, and the method by which the ball bearing driver drives the lifting frame 130 closer to the welding machine body 200 is known to those skilled in the art and is feasible; therefore, it will not be described in detail in this embodiment.

[0043] To facilitate welding of the welding machine body, such as Figure 4 As shown, in this embodiment, the welding machine body 200 includes a housing, a welding head 250, and a welding driver 240 for driving the welding head 250 closer to or further away from the electrode tab. The housing is connected to the mounting bracket 120, and the welding driver 240 is disposed on the housing. The welding driver 240 is drivenly connected to the welding head 250, and the welding head 250 is positioned directly opposite the lower welding seat 210. Specifically, the welding head 250 is connected to an external welding assembly, which generates ultrasonic waves. The welding driver 240 drives the welding head 250 closer to the electrode tab, thereby facilitating welding of the electrode tab on the lower welding seat 210. The welding driver 240 is configured as a cylinder. The method of using a cylinder to drive the welding head 250 closer to the electrode tab is known to those skilled in the art and is feasible; therefore, it will not be described in detail in this embodiment.

[0044] It is understandable that ultrasonic welding machines generate a large amount of dust during operation due to the high-frequency vibration and friction of sound waves. This dust can harm the environment and operators, and if it enters the battery cells, it can affect the performance of the power battery. To increase the practicality of the ultrasonic welding machine 10, such as... Figure 3As shown, in this embodiment, the housing is provided with a dust removal mechanism 500 for removing welding dust. Specifically, the dust removal mechanism 500 includes a dust removal pipe and a dust collector for generating negative pressure. The outlet of the dust removal pipe is connected to the dust collector, and the inlet of the dust removal pipe is located close to the welding head. In this way, through the dust removal function of the dust removal mechanism 500, the harm of dust to the environment and operators is effectively avoided, and the generation of defective battery cells is reduced, effectively increasing the practicality of the ultrasonic welding machine 10.

[0045] To facilitate timely operation of the electrode tabs, in this embodiment, a proximity sensor 400 for detecting the electrode tabs is provided on the housing. Specifically, when the proximity sensor 400 detects that the electrode tab has reached the welding position, it sends an electrical signal to the control system in the ultrasonic welding machine 10. The control system then controls the lifting driver 300 and the electrode tab driver 230, causing the lower welding seat 210 to slide upward to support the upper surface of the electrode tab, and the electrode tab pressing block 220 to press down on the upper surface of the electrode tab. This facilitates timely operation of the electrode tabs that have reached the welding position.

[0046] To facilitate the handling of the welding machine body 200, in this embodiment, as follows: Figure 2 As shown, the ultrasonic welding machine 10 also includes a pull ring 600 for lifting the welding machine body 200, the pull ring 600 being disposed on the top of the welding machine body 200. Specifically, the pull ring 600 facilitates the movement of the welding machine body 200.

[0047] Example 2

[0048] This embodiment is similar to Embodiment 1, except that N=3. When N=3, there are 12 ultrasonic welding machines 10 during operation. The fixture has three cell positions for placing the battery cells, and the 12 ultrasonic welding machines 10 are symmetrically distributed on opposite sides of the conveyor track. Thus, each pair of opposite ultrasonic welding machines 10 forms a group, and the fixture sequentially transports the cells from the first group to the sixth group on the conveyor track, thereby completing the welding. The first and second groups are used to complete the double-pass welding of the positive and negative electrodes of the first battery cell; the third and fourth groups are used to complete the double-pass welding of the positive and negative electrodes of the second battery cell; and the fifth and sixth groups are used to complete the double-pass welding of the positive and negative electrodes of the third battery cell, thus completing the welding process of the entire ultrasonic welding module 20. In this way, the ultrasonic welding module 20 can simultaneously transport and process three battery cells, effectively improving welding efficiency.

[0049] Example 3

[0050] This embodiment is a further preferred embodiment of embodiment 1. In this embodiment, the tab pressing block 220 is provided with a protective layer. By providing a protective layer on the tab pressing block 220, the material of the protective layer is silicone. Because the material of the protective layer is relatively soft, it can protect the tab. In this way, the tab pressing block 220 can effectively avoid damage to the upper surface of the tab.

[0051] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An ultrasonic welding module, characterized in that, include: The conveying channel (700), 4N ultrasonic welding machines (10) and a fixture that can move along the conveying channel (700) are provided with N battery cell positions for placing battery cells, N≥1, and the 4N ultrasonic welding machines (10) are symmetrically distributed on opposite sides of the conveying channel (700). The ultrasonic welding machine (10) includes a lifting driver (300) and a welding mechanism for welding electrodes, wherein the output end of the lifting driver (300) is connected to the welding mechanism. The welding mechanism includes a welding machine mounting base (100), a lower welding seat (210) for abutting the lower surface of the electrode tab, a welding machine body (200) disposed on the welding machine mounting base (100), and a pressure electrode tab assembly for smoothing the electrode tab on the lower welding seat (210). The lifting driver (300) is drivenly connected to the welding machine mounting base (100). The welding machine body (200) is disposed on the welding machine mounting base (100), the lower welding seat (210) is disposed on the welding machine body (200), and the pressure electrode tab assembly is disposed on the welding machine body (200). The welding machine body (200) and the welding machine mounting base (100) are detachably connected; The welding machine mounting base (100) includes a mounting frame (120) for mounting the welding machine body (200), a lifting frame (130) for sliding up and down within the mounting frame (120), a plurality of ball bearing rollers (110) mounted on the top surface of the lifting frame (130), and a ball bearing driver for driving the lifting frame (130) to slide up and down within the mounting frame (120). The mounting frame (120) is detachably connected to the welding machine body (200). The top surface of the mounting frame (120) has a plurality of through holes. The output end of the ball bearing driver is connected to the lifting frame (130). The ball bearing rollers (110) are rotatably mounted on the lifting frame (130), and the top of the ball bearing rollers (110) protrudes from the through holes at one end near the welding machine body (200). The welding machine body (200) includes a housing, which is connected to the mounting bracket (120), and the housing is provided with a dust removal mechanism (500) for removing dust generated during welding.

2. The ultrasonic welding module according to claim 1, characterized in that, N=2。 3. The ultrasonic welding module according to claim 1, characterized in that, The electrode assembly includes an electrode clamping block (220) and an electrode driver (230). The electrode driver (230) is disposed on the welding machine body (200), and the electrode clamping block (220) is connected to the output end of the electrode driver (230).

4. The ultrasonic welding module according to claim 3, characterized in that, The cross-sectional shape of the tab block (220) is set to L-shape, and one end of the tab block (220) is in movable contact with the upper surface of the battery cell, and the other end of the tab block (220) is in movable contact with the tab on the battery cell.

5. The ultrasonic welding module according to claim 1, characterized in that, The welding machine body (200) also includes a welding head (250) and a welding driver (240) for driving the welding head (250) to move closer to or away from the electrode tab. The welding driver (240) is disposed on the housing and is drivenly connected to the welding head (250). The welding head (250) is disposed opposite to the lower welding seat (210).

6. The ultrasonic welding module according to claim 5, characterized in that, The housing is equipped with a proximity sensor (400) for detecting the tabs.

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