Lithium battery ultrasonic welding dust removal device and ultrasonic welding equipment dust removal system

Abstract

The utility model provides a lithium battery ultrasonic welding dust removal device and ultrasonic welding equipment dust removal system, including first dust removal mechanism and second dust removal mechanism, first dust removal mechanism and second dust removal mechanism cover the station of ultrasonic welding machine, first dust removal mechanism includes first shell, be equipped with first negative pressure chamber in the first shell, second dust removal mechanism is equipped with second negative pressure chamber in the second shell. A first negative pressure cavity is formed in the first shell, a second negative pressure cavity is formed in the second shell, a first dust suction port connected with the first negative pressure cavity is formed in the first shell, and a second dust suction port connected with the second negative pressure cavity is further formed in the second shell; the first negative pressure cavity and the second negative pressure cavity are connected with a negative pressure generator, the first shell covers the front face of the product welding position of the welding station of the ultrasonic welding machine, and the second shell covers the back face of the product welding position of the welding station of the ultrasonic welding machine. Dust is sucked away by negative pressure on the front side and the back side of the device, air is not blown, so that the problem that the dust is blown into the battery is avoided, the effect of protecting the battery can be achieved, the front side and the back side of a tab welding area are completely covered, and rapid loss of suction force can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of dust removal, in particular to a lithium battery ultrasonic welding dust removal device and an ultrasonic welding equipment dust removal system. Background Art

[0002] Lithium battery production requires a clean environment because fine dust particles, once inside the battery, can cause safety hazards such as battery bulging, short circuits, and fires. To protect lithium batteries from dust during the tab welding process, tab welding dust removal devices have emerged on the market, designed to eliminate the dust generated during welding. These devices typically cover the tab welding area with a carefully designed shell, attempting to blow away dust by blowing air from one side and suctioning air from the other side to capture and recover the dust.

[0003] However, the traditional air blowing dust removal method has a potential risk: during the blowing process, the wind may blow the dust into the interlayer of the lithium battery, which may still cause the problems mentioned above. Utility Model Content

[0004] In order to solve the above problems, the purpose of the utility model is to provide a lithium battery ultrasonic welding dust removal device and an ultrasonic welding equipment dust removal system.

[0005] The utility model adopts the following method to achieve:

[0006] A lithium battery ultrasonic welding dust removal device includes a first dust removal mechanism and a second dust removal mechanism, the first dust removal mechanism and the second dust removal mechanism covers are arranged at the work station of the ultrasonic welding machine, the first dust removal mechanism includes a first shell, a first negative pressure chamber is provided in the first shell; the second dust removal mechanism includes a second shell, a second negative pressure chamber is provided in the second shell; the first shell is provided with a first dust suction port connected to the first negative pressure chamber, and the second shell is also provided with a second dust suction port connected to the second negative pressure chamber; the first negative pressure chamber and the second negative pressure chamber are connected to a negative pressure generator, the first shell covers the front of the welding position of the product at the welding position of the ultrasonic welding machine, the second shell covers the back of the welding position of the product at the welding position of the ultrasonic welding machine, the first dust suction port is connected to the front of the welding position of the product, and the second dust suction port is connected to the back of the welding position of the product.

[0007] Preferably, the first shell includes a tab upper pressure block, which is arranged on the lower side of the first shell and presses on the front of the product; the second shell includes a tab lower pressure block, which is arranged on the upper side of the second shell and presses on the back of the product, and the tab upper pressure block is provided with a first clearance hole for passing the welding head of the ultrasonic welding machine, and the tab lower pressure block is provided with a second clearance hole for passing the product jig; the first dust suction port is connected to the first clearance hole, and the second dust suction port is connected to the second clearance hole.

[0008] Preferably, two first dust suction ports are provided, which are respectively located on the side of the welding head close to the ultrasonic welding machine body and the side away from it. Battery pressure blocks are provided on both sides of the bottom of the first shell adjacent to the two first dust suction ports, forming a space surrounding the ultrasonic welding machine welding head with the first shell, and the frame of the second dust suction port surrounds the product jig.

[0009] Preferably, the first shell includes a front shell and a rear shell, wherein one of the first dust suction ports is provided at the bottom of the front shell, and the other first dust suction port is provided at the bottom of the rear shell, and the two first negative pressure chambers are respectively provided in the front shell and the rear shell, and the front shell and the shell are connected together; the cross-section of the rear shell is U-shaped, and the open end is fixedly connected to the rear side surface of the front shell, and the inner side of the U-shape of the rear shell forms a space for accommodating the welding head.

[0010] Preferably, a longitudinal clearance groove is provided in the middle of the front shell for passing the cantilever of the ultrasonic welding machine body to connect to the welding head; the clearance groove divides the first negative pressure chamber in the front shell into two parts, each of which is connected to a dust suction pipe to connect to the negative pressure generator, and the two parts of the first negative pressure chamber are jointly connected to a first dust suction port at the bottom of the front shell.

[0011] Preferably, the width of the front shell is greater than that of the rear shell, the middle of the bottom of the rear shell bulges downward, the width of the bulge is equal to the width of the pressure block on the tab, the rear side of the bottom of the front shell rests against the front sides of the two batteries; the left and right lower ends of the rear shell rest against the upper surfaces of the batteries on the left and right sides respectively.

[0012] Preferably, the second shell surrounds the jig of the ultrasonic welding machine, and the second shell is provided with a dust suction pipe connected to the second negative pressure chamber for connecting the negative pressure generator; the upper end of the jig of the ultrasonic welding machine passes through the second dust suction port, and the second dust suction port is opposite to the second clearance hole.

[0013] A dust removal system for lithium battery ultrasonic welding equipment is provided with a dust removal main unit and a lithium battery ultrasonic welding dust removal device as described in any one of the above items, wherein the negative pressure generator is the dust removal main unit; and further includes a reflow tray dust removal device, which is connected to the dust removal main unit and is provided on a tray rotary conveying mechanism for removing dust from a tray containing batteries.

[0014] Preferably, the return tray dust removal device includes a third shell provided on the tray rotary conveying mechanism, the third shell is provided with a downward-opening mounting groove, a nozzle and a negative pressure port are provided in the mounting groove, the nozzle is connected to the air supply end of the dust removal host, and the negative pressure port is connected to the dust suction port of the dust removal host.

[0015] Preferably, the nozzle is a cyclone head, a plurality of the cyclone heads are installed in the middle of the installation groove, and a plurality of the negative pressure ports are arranged at the bottom edge of the installation groove.

[0016] The beneficial effects of the present invention are as follows: the present invention provides a lithium battery ultrasonic welding dust removal device and an ultrasonic welding equipment dust removal system. Compared with the prior art, the present invention has at least the following technical effects:

[0017] 1. The lithium battery ultrasonic welding dust removal device covers the front and back of the product welding part through the first shell and the second shell respectively. The first shell is provided with a first dust suction port to suck away the dust generated on the front of the tab, and the second shell is provided with a second dust suction port to suck away the dust generated on the back of the tab. Compared with the traditional solution of blowing up the dust and then sucking it away, this device uses negative pressure to suck away the dust on both sides. There is no dust blowing action, so there is no problem of blowing dust into the battery, which can protect the battery. In addition, the front and back of the tab welding area are covered to prevent the rapid loss of suction force, ensuring that the first and second dust suction ports have sufficient suction force to suck away the dust generated on the front and back during ultrasonic welding.

[0018] 2. The upper and lower tab pressing blocks are provided to better fix the tabs during welding, and the first and second clearance holes are provided to facilitate the welding of the tabs by the welding head, and a channel connecting the first and second dust suction ports is provided to quickly absorb the dust generated during welding.

[0019] 3. Since dust removal above the welding point requires overcoming gravity, two first suction ports are provided, one at the front and one at the rear above the welding point. This allows for simultaneous suction on both sides, providing greater suction force and helping to remove dust above the welding point.

[0020] 4. The front and rear housings, along with the battery and battery pack, form a closed space surrounding the first clearance hole in the tab upper pressure block. This prevents dust from being drawn in from outside the tab weld, thus avoiding excess suction and ensuring that the first suction port maintains suction at the tab weld.

[0021] 5. The second dust suction port is set around the product fixture and corresponds to the second clearance hole of the tab lower pressure block. The dust generated on the lower side of the welding part during welding is affected by the dual effects of gravity and the suction force of the second dust suction port, which can quickly absorb the dust generated on the lower side.

[0022] 6. A dust removal system for lithium battery ultrasonic welding equipment, which uses the above-mentioned lithium battery ultrasonic welding dust removal device to absorb and remove dust from the lithium battery's tab welding area without blowing air into the welding area. A tray is required to hold the batteries to be welded to the ultrasonic welding area. After the batteries in the tray are removed, they need to be returned to the original position through a tray rotation conveyor mechanism to be loaded again. If dust removal is not performed during this process, dust will accumulate in the tray after long-term use. The dust may enter the battery pack, causing subsequent problems such as bulging or short circuit. Therefore, a reflux tray dust removal device is provided. Since there are no batteries on the tray at this time, the dust on the tray is blown by the nozzle in the middle of the third shell mounting slot, and then the dust is sucked into the dust removal host through the negative pressure port on the edge of the third shell. The dust removal effect is good and dust accumulation on the tray is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of a lithium battery ultrasonic welding dust removal device of the present invention.

[0024] Figure 2 This is a structural schematic diagram of a lithium battery ultrasonic welding dust removal device from another perspective of the present invention.

[0025] Figure 3 It is a structural schematic diagram of the first shell of the utility model.

[0026] Figure 4 This is another structural schematic diagram of the first shell of the present invention.

[0027] Figure 5 It is a structural schematic diagram of the second shell of the utility model.

[0028] Figure 6 It is a schematic diagram of the connection relationship between the ultrasonic welding machine and the battery block, the tab upper block, the battery, etc.

[0029] Figure 7 The utility model is a schematic diagram of the cross-sectional structure of a lithium battery ultrasonic welding dust removal device.

[0030] Figure 8The utility model is a structural schematic diagram of a dust removal system for lithium battery ultrasonic welding equipment.

[0031] Figure 9 It is a structural schematic diagram of the return tray dust removal device of the present utility model.

[0032] Explanation of the accompanying numbers: 1. First dust removal mechanism; 11. First shell; 111. Front shell; 112. Rear shell; 113. Make way slot; 12. First negative pressure chamber; 13. First dust suction port; 14. Upper tab pressure block; 15. First make way hole; 16. Battery pressure block; 17. Make way slot, 2. Second dust removal mechanism; 21. Second shell; 22. Second negative pressure chamber; 23. Second dust suction port; 24. Lower tab pressure block; 25. Second make way hole, 3. Ultrasonic welding machine; 31. Welding head; 32. Jig; 4. Dust suction pipe; 5. Dust removal host; 6. Reflux tray dust removal device; 61. Third shell; 62. Air blowing port; 63. Air suction port; 7. Tray rotary conveying mechanism; 8. Air blowing pipe. DETAILED DESCRIPTION

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0034] See also Figures 1 to 7A lithium battery ultrasonic welding dust removal device includes a first dust removal mechanism 1 and a second dust removal mechanism, the first dust removal mechanism 1 and the second dust removal mechanism are covered at the workstation of the ultrasonic welding machine, the first dust removal mechanism 1 includes a first shell 11, a first negative pressure chamber 12 is provided in the first shell 11; the second dust removal mechanism includes a second shell 21, a second negative pressure chamber 22 is provided in the second shell 21, the first shell 11 is provided with a first dust suction port 13 connected to the first negative pressure chamber 12, the second shell 21 is further provided with a second dust suction port 23 connected to the second negative pressure chamber 22; the first negative pressure chamber 12 and the second negative pressure chamber 22 are connected to a negative pressure generator, the first shell 11 covers the front of the welding position of the product at the welding position of the ultrasonic welding machine, the second shell 21 covers the back of the welding position of the product at the welding position of the ultrasonic welding machine, the first dust suction port 13 is communicated with the front of the welding position (tab) of the product, and the second dust suction port 23 is communicated with the back of the welding position of the product. By respectively covering the front and back sides of the welding part of the product with a first shell 11 and a second shell 21, the first shell 11 is provided with a first dust suction port 13 to suck away the dust generated on the front side of the tab, and the second shell 21 is provided with a second dust suction port 23 to suck away the dust generated on the back side of the tab. Compared with the traditional solution of blowing up the dust and then sucking it away, this device uses negative pressure to suck away the dust on both sides, without blowing the dust, so there is no problem of blowing the dust into the battery, which can protect the battery. In addition, the front and back sides of the tab welding area are covered to prevent the rapid loss of suction force, thereby ensuring that the first dust suction port 13 and the second dust suction port 23 have sufficient suction force to suck away the dust generated on the front and back sides during ultrasonic welding.

[0035] See also Figures 1 to 7 Preferably, the first shell 11 includes a tab upper pressing block 14, which is arranged on the lower side of the first shell 11 and presses on the front of the product; the second shell 21 includes a tab lower pressing block 24, which is arranged on the upper side of the second shell 21 and presses on the back of the product. The tab upper pressing block 14 is provided with a first clearance hole 15 for passing the welding head 31 of the ultrasonic welding machine, and the tab lower pressing block 24 is provided with a second clearance hole for passing the product jig 32; the first dust suction port 13 is connected to the first clearance hole 15, and the second dust suction port 23 is connected to the second clearance hole. The arrangement of the tab upper pressing block 14 and the tab lower pressing block 24 can better fix the tab during welding, and the provision of the first clearance hole 15 and the second clearance hole facilitates the welding head 31 to weld the tab, and provides a channel connecting the first dust suction port 13 and the second dust suction port 23, so as to quickly absorb the dust generated during welding.

[0036] See also Figures 1 to 4 、 Figure 7Preferably, two first suction ports 13 are provided, one located on the side of the welding head 31 close to the ultrasonic welding machine body and the other located away from the body. Battery pressure blocks 16 are provided on both sides of the bottom of the first shell 11 adjacent to the two first suction ports 13, forming a space surrounding the ultrasonic welding machine welding head 31 together with the first shell 11. The frame of the second suction port 23 surrounds the product jig 32. Since dust removal above the welding point requires overcoming gravity, two first suction ports 13 are provided, one located on the front and one located on the rear side above the welding point. This allows for simultaneous suction on both sides, providing greater suction force and helping to remove dust from the upper side of the welding point. The voltage pressure block facilitates fixing the battery.

[0037] See also Figures 1 to 4 、 Figure 7 Preferably, the first shell 11 includes a front shell 111 and a rear shell 112, wherein one of the first dust suction ports 13 is provided at the bottom of the front shell 111, and the other first dust suction port 13 is provided at the bottom of the rear shell 112. The two first negative pressure chambers 12 are provided in the front shell 111 and the rear shell 112, respectively. The front shell 111 and the shells are connected together. The rear shell 112 has a U-shaped cross section, with the open end fixedly connected to the rear side of the front shell 111. The U-shaped inner side of the rear shell 112 forms a space for accommodating the welding head. The front shell 111, the rear shell 112, the battery and the battery pressing block 16 form a closed space surrounding the first clearance hole 15 on the tab upper pressing block 14, which can prevent dust from being sucked in from outside the circumference of the tab welding area, avoid the suction force from overflowing, and ensure the suction force of the first dust suction port 13 on the tab welding area.

[0038] See also Figures 1 to 4 、 Figure 7 Preferably, a longitudinal clearance slot 113 is provided in the middle of the front housing 111 for passing the cantilever arm of the ultrasonic welding machine body through the front housing 111 to connect to the welding head 31. The clearance slot 113 divides the first negative pressure chamber 12 in the front housing 111 into two parts, each of which is connected to a suction pipe 4 and communicates with the negative pressure generator. The two parts of the first negative pressure chamber 12 are connected to a first suction port 13 at the bottom of the front housing 111. The provision of the clearance slot 113 facilitates installation of the device on the ultrasonic welding machine.

[0039] See also Figures 1 to 4 Preferably, the width of the front housing 111 is greater than that of the rear housing 112. The center of the bottom of the rear housing 112 is convex downward, and the width of the convex portion is equal to the width of the tab upper pressing block 14. The rear side of the bottom of the front housing 111 abuts the front sides of the two batteries; the left and right lower ends of the rear housing 112 abut the upper surfaces of the left and right batteries, respectively. This facilitates the formation of a space surrounding the first clearance hole 15, preventing side air inflow and achieving better dust removal.

[0040] See also Figures 1 to 2 、 Figure 5 、 Figure 7 Preferably, the second housing 21 surrounds the ultrasonic welding jig 32. A dust suction pipe 4 is provided on the second housing 21, communicating with the second negative pressure chamber 22 and connected to the negative pressure generator. The upper end of the ultrasonic welding jig 32 extends through the second dust suction port 23, which is opposite the second clearance hole. The second dust suction port 23 surrounds the product jig 32 and corresponds to the second clearance hole of the tab lower pressure block 24. During welding, dust generated on the lower side of the weld is quickly removed by the dual forces of gravity and suction from the second dust suction port 23.

[0041] See also Figures 1 to 9A dust removal system for lithium battery ultrasonic welding equipment comprises a dust removal main unit 5 and a lithium battery ultrasonic welding dust removal device as described above, wherein the negative pressure generator is the dust removal main unit 5; and further comprising a return tray dust removal device 6, which is connected to the dust removal main unit 5 and is disposed on a tray rotary conveyor mechanism 7 (which may be a conveyor belt, etc.), and is used to remove dust from the tray holding the batteries. The return tray dust removal device 6 includes a third housing 61 disposed on the tray rotary conveyor mechanism 7. The third housing 61 is provided with a downwardly opening mounting groove, the mounting groove being provided with a nozzle and a negative pressure port. The nozzle is connected to the air supply end of the dust removal main unit 5, and the negative pressure port is connected to the dust suction port of the dust removal main unit 5. The nozzle is a cyclone head (compressed air blown from the cyclone head generates an ultrasonic resonant airflow, which lifts dust attached to the tray and is sucked away by the negative pressure port for recovery by the dust removal main unit). Multiple cyclone heads are installed in the middle of the mounting slot, and multiple negative pressure ports are located at the bottom edge of the mounting slot. The lithium battery ultrasonic welding dust removal device described above removes dust from the tab welds of lithium batteries without blowing air into the welds. Batteries to be welded are transported to the ultrasonic welding site using a tray. After the batteries are removed from the tray, they are returned to their original position via a tray rotary conveyor mechanism for reloading. If dust removal is not performed during this process, dust will accumulate in the tray over long-term use. Dust can then enter the battery pack, potentially causing subsequent bulging or short circuits. Therefore, a reflow tray dust removal device 6 is provided. Since there are no batteries on the tray at this time, air is blown from the nozzle in the middle of the mounting slot of the third housing 61 to lift dust from the tray. The dust is then removed through the negative pressure port at the edge and sucked into the dust removal main unit 5, achieving effective dust removal and preventing dust accumulation on the tray. A sensor is installed within the third housing 61 to monitor the rotation of the cyclone head. The third housing 61 is provided with an air inlet 62 connected to the cyclone head's air inlet. This inlet 62 is connected to the air supply of the dust collector 5 via an air pipe 8. The third housing 61 is also provided with an air intake 63 connected to the negative pressure port. This inlet 63 is connected to the dust collection port of the dust collector 5. Air flows from the air inlet 62 through the cyclone head and onto the lower tray. Recovered dust is stored within the dust collector 5. When the set value is reached, the dust collector 5 will sound an alarm to remind you to clean it up.

[0042] The utility model has the following working principle:

[0043] The lithium battery ultrasonic welding dust removal device is installed on the ultrasonic welding machine, and the first dust suction port 13 on the front shell 111 and the rear shell 112 of the first shell 11 surrounds the first clearance port, and the first clearance hole 15 of the upper pressure block 14 of the pole ear facilitates the welding head 31 to extend into the contact pole ear and form a channel connected to the upper end of the pole ear, so that the first dust suction port 13 sucks away the dust generated during welding. The surrounding jig has a stronger suction force and can remove the dust more thoroughly; and the second dust suction port 23 surrounds the jig 32 and faces the second clearance hole to form a welding place around the lower end of the pole ear, which can completely remove the dust generated during the welding of the lower end face of the pole ear. The dust removal host 5 is connected to the first negative pressure chamber 12 and the second negative pressure chamber 22 through the dust removal pipe to generate negative pressure dust removal at the first negative pressure port and the second negative pressure port. Empty pallets are transported via a pallet rotary conveyor mechanism 7 to a location where a return pallet dust removal device 6 is installed. A dust removal unit 5 supplies air to a cyclone head via a pipe. Compressed air from the cyclone head generates an ultrasonic resonant airflow that blows toward the pallet surface, lifting any dust adhering to the pallet. The dust is then drawn into the dust removal unit 5 through a negative pressure port, an air intake, and a dust collection pipe 4 for collection and recovery. This dust removal system is highly effective, effectively cleaning the dust generated by lithium battery ultrasonic welding equipment.

[0044] Several points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which can be mechanical connection or electrical connection, or internal communication between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may change.

[0045] Secondly: The drawings of the disclosed embodiments of the present invention only involve structures related to the disclosed embodiments. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0046] Finally, the above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention fall within the protection scope of the present invention.

[0047] It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications without departing from the principle of the present invention should also be regarded as within the scope of protection of the present invention.

Claims

1. A lithium battery ultrasonic welding dust removal device, characterized by: It includes a first dust removal mechanism and a second dust removal mechanism, and the first dust removal mechanism and the second dust removal mechanism cover are arranged at the work station of the ultrasonic welding machine, the first dust removal mechanism includes a first shell, and a first negative pressure chamber is provided in the first shell; the second dust removal mechanism includes a second shell, and a second negative pressure chamber is provided in the second shell; the first shell is provided with a first dust suction port connected to the first negative pressure chamber, and the second shell is also provided with a second dust suction port connected to the second negative pressure chamber; the first negative pressure chamber and the second negative pressure chamber are connected to a negative pressure generator, the first shell covers the front of the welding position of the product at the welding position of the ultrasonic welding machine, and the second shell covers the back of the welding position of the product at the welding position of the ultrasonic welding machine, the first dust suction port is connected to the front of the welding position of the product, and the second dust suction port is connected to the back of the welding position of the product.

2. The lithium battery ultrasonic welding dust removal device according to claim 1, characterized in that: The first shell includes a tab upper pressure block, which is arranged on the lower side of the first shell and presses on the front of the product; the second shell includes a tab lower pressure block, which is arranged on the upper side of the second shell and presses on the back of the product, and the tab upper pressure block is provided with a first clearance hole for passing the welding head of the ultrasonic welding machine, and the tab lower pressure block is provided with a second clearance hole for passing the product jig; the first dust suction port is connected to the first clearance hole, and the second dust suction port is connected to the second clearance hole.

3. The lithium battery ultrasonic welding dust removal device according to claim 2, characterized in that: There are two first dust suction ports, which are located on the side of the welding head close to the ultrasonic welding machine body and the side away from it respectively. Battery blocks are provided on both sides of the bottom of the first shell adjacent to the two first dust suction ports, forming a space surrounding the ultrasonic welding machine welding head with the first shell. The frame of the second dust suction port surrounds the product jig.

4. A lithium battery ultrasonic welding dust removal device according to claim 3, characterized in that: The first shell includes a front shell and a rear shell, wherein one of the first dust suction ports is provided at the bottom of the front shell, and the other first dust suction port is provided at the bottom of the rear shell, and the two first negative pressure chambers are respectively provided in the front shell and the rear shell, and the front shell and the shell are connected together; the cross-section of the rear shell is U-shaped, and the open end is fixedly connected to the rear side surface of the front shell, and the inner side of the U-shape of the rear shell forms a space for accommodating the welding head.

5. The lithium battery ultrasonic welding dust removal device according to claim 4, characterized in that: A longitudinal clearance groove is provided in the middle of the front shell for passing the cantilever of the ultrasonic welding machine body to connect to the welding head; the clearance groove divides the first negative pressure chamber in the front shell into two parts, each of which is connected to a dust suction pipe to connect to the negative pressure generator, and the two parts of the first negative pressure chamber are jointly connected to a first dust suction port at the bottom of the front shell.

6. The lithium battery ultrasonic welding dust removal device according to claim 4, characterized in that: The width of the front shell is greater than that of the rear shell. The middle of the bottom of the rear shell bulges downward, and the width of the bulge is equal to the width of the pressure block on the tab. The rear side of the bottom of the front shell rests against the front sides of the two batteries; the left and right lower ends of the rear shell rest against the upper surfaces of the batteries on the left and right sides respectively.

7. The lithium battery ultrasonic welding dust removal device according to claim 2, characterized in that: The second shell surrounds the jig of the ultrasonic welding machine, and the second shell is provided with a dust suction pipe connected to the second negative pressure chamber for connecting the negative pressure generator; the upper end of the jig of the ultrasonic welding machine passes through the second dust suction port, and the second dust suction port is opposite to the second clearance hole.

8. A dust removal system for lithium battery ultrasonic welding equipment, equipped with a dust removal host, characterized by: There is also a lithium battery ultrasonic welding dust removal device as described in any one of claims 1 to 7, wherein the negative pressure generator is the dust removal host; and a reflux tray dust removal device is also included, which is connected to the dust removal host and is arranged on a tray rotary conveying mechanism to remove dust on the tray containing the batteries.

9. The dust removal system for lithium battery ultrasonic welding equipment according to claim 8, characterized in that: The return tray dust removal device includes a third shell arranged on the tray rotary conveying mechanism, and the third shell is provided with a downward-opening mounting groove, and a nozzle and a negative pressure port are provided in the mounting groove. The nozzle is connected to the air supply end of the dust removal host, and the negative pressure port is connected to the dust suction port of the dust removal host.

10. A dust removal system for lithium battery ultrasonic welding equipment according to claim 9, characterized in that: The nozzle is a cyclone head, and a plurality of the cyclone heads are installed in the middle of the installation groove, and a plurality of the negative pressure ports are arranged on the bottom edge of the installation groove.

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