Dust removal device for butterfly ultrasonic welding of lithium ion battery
By using first and second dust hoods combined with vacuum negative pressure suction and anti-leakage components in the lithium-ion battery butterfly ultrasonic welding device, the problem of dead corners in traditional dust removal is solved, achieving comprehensive cleaning of the welding area and improving battery safety.
Patent Information
- Application Number
- CN202511471697.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-15
- Publication Date
- 2025-12-12
AI Technical Summary
In the traditional ultrasonic welding process for lithium-ion batteries, the complex welding structure and limited dust extraction pipe layout create dust removal dead zones, making it impossible to effectively remove metal powder from the tab adhesive, which affects welding quality and battery safety.
A dust removal device for ultrasonic welding of lithium-ion batteries using butterflies was designed. The device uses first and second dust removal hoods to cover the upper and lower parts of the welding area, combined with a vacuum generator to generate negative pressure to suck up dust, and uses anti-leakage components and diversion components to handle leaked gas at the connection point, ensuring stability and complete dust removal.
It effectively covers the welding area, completely removes dust, improves welding quality, reduces the adverse effects of dust on the battery, and enhances battery safety and production qualification rate.
Smart Images
Figure CN121104294A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of lithium ion battery welding dust removal, and particularly relates to a dust removal device for butterfly ultrasonic welding of lithium ion batteries. BACKGROUND
[0002] As a rechargeable energy storage device, lithium ion batteries are widely used in electronic devices, electric vehicles and energy storage systems, etc. The basic structure of the lithium ion battery includes positive electrode, negative electrode, electrolyte and diaphragm, etc. In the production process of the lithium ion battery, butterfly ultrasonic welding is a crucial process. The process generates friction heat on the contact surface material through high-frequency mechanical vibration, and then realizes atomic diffusion bonding between metal foil materials. In the battery tab welding link, this friction welding mechanism is particularly critical, and the welding quality is directly related to the internal resistance and safety of the battery. However, in the actual production process, there are some problems in butterfly ultrasonic welding. A large amount of metal dust is generated in the welding process due to high-frequency friction. When the thickness of the single-layer foil is too thin and the welding amplitude and pressure are too large, the amount of metal powder generated will increase sharply.
[0003] The existence of these metal dusts brings many hazards. First, if the conductive dust (such as aluminum and copper particles) falls on the tab adhesive, it will cause a short circuit in the battery. Due to the viscosity of the tab adhesive, it is difficult to remove the dust once it is attached. Secondly, the dust accumulated around the welding station may be sucked into the subsequent welding area, causing uneven welding strength. In addition, during the storage and use of the battery, the residual dust may migrate to the diaphragm area, causing internal short circuit. These problems seriously affect the performance and safety of the lithium ion battery.
[0004] In the ultrasonic welding process of the lithium ion battery, in order to ensure the welding quality and the safety of the battery, the dust removal link is crucial. The traditional dust removal method usually adopts manual operation or semi-automatic dust removal equipment. Usually, dust extraction pipes are installed in the welding area to achieve dust collection. However, this dust extraction method has obvious defects. Due to the complex welding structure and the layout limitation of the dust extraction pipe, it is difficult to cover all welding parts, resulting in dust removal dead angles and being unable to effectively remove the metal powder adhered to the tab adhesive.
[0005] To solve the above problems, a dust removal device for butterfly ultrasonic welding of lithium ion batteries is provided in the present application. SUMMARY
[0006] The present application provides a dust removal device for butterfly ultrasonic welding of lithium ion batteries, which solves the problem of defects in the traditional dust removal method in the ultrasonic welding of lithium ion batteries. Due to the complex welding structure and the layout limitation of the dust extraction pipe, it is difficult to cover all welding parts, resulting in dust removal dead angles and being unable to effectively remove the metal powder on the tab adhesive.
[0007] The application provides a dust removal device for butterfly ultrasonic welding of lithium ion batteries.
[0008] The ultrasonic welding machine is arranged on the workbench and can move close to or away from the support, a backflow fixture for fixing the battery cell is arranged on the support, a first dust removal cover is arranged on the ultrasonic welding machine through a welding seat, a loading shell above the welding seat and a driving piece for driving the loading shell to move up and down are arranged on the ultrasonic welding machine, a second dust removal cover and a welding head below the second dust removal cover are arranged on the loading shell, and the second dust removal cover has the same overall structure as the first dust removal cover but is different in size.
[0009] A dust extraction main pipe is arranged on the side surface of the ultrasonic welding machine, two dust extraction branch pipes are connected to the dust extraction main pipe, the two dust extraction branch pipes are connected to the first dust removal cover and the second dust removal cover respectively, a vacuum generator is arranged on the path of each of the two dust extraction branch pipes, a leakage prevention assembly is arranged on each of the two vacuum generators, and a shunt is arranged on each of the two leakage prevention assemblies and communicates with the dust extraction main pipe.
[0010] As a further optimization scheme of the application, the first dust removal cover and the second dust removal cover are formed in a horn mouth shape on one side adjacent to each other, two dust extraction holes are arranged at the horn mouth position, a dust extraction channel that communicates with the dust extraction holes is arranged in each of the first dust removal cover and the second dust removal cover, and the two dust extraction branch pipes communicate with the dust extraction channels in the first dust removal cover and the second dust removal cover respectively.
[0011] As a further optimization scheme of the application, the leakage prevention assembly comprises two arc-shaped covers, an arc-shaped shaft and a detachable piece, the two arc-shaped covers are combined and a leakage prevention cavity is formed in the two arc-shaped covers, the two vacuum generators are arranged in the two leakage prevention cavities respectively, the arc-shaped shaft is arranged on the two ends of the two arc-shaped covers and covers the dust extraction branch pipe, the two arc-shaped covers are detachably connected through the detachable piece, the shunt is connected to one of the arc-shaped covers and communicates with the leakage prevention cavity.
[0012] As a further optimization scheme of the application, the detachable piece comprises a bolt and a nut, an edge lug is arranged on each side of the two arc-shaped covers, the edge lugs on the two sides of the two arc-shaped covers are tightly fitted, the bolt is threadedly connected to the edge lug, and the nut is threadedly connected to the edge lug and tightly abuts against the edge lug.
[0013] As a further optimization scheme of the application, the shunt comprises a shunt pipe and a valve, the shunt pipe that communicates with the leakage prevention cavity is connected to the outside of one of the arc-shaped covers, and the valve is arranged on the shunt pipe.
[0014] As a further optimization scheme of the application, the shunt further comprises a gas leakage sensor, the gas leakage sensor is arranged on the inner wall of one of the arc-shaped covers and located in the leakage prevention cavity.
[0015] As a further optimization scheme of the present application, the top end of the dust extraction main pipe is connected with a dust guide pipe, and the dust guide pipe is used to be connected with the dust removal machine.
[0016] As a further optimization scheme of the present application, the driving member comprises a cylinder, the cylinder is installed on the top of the ultrasonic welding machine, the loading shell is connected with the driving end of the cylinder and is driven to move up and down by the cylinder.
[0017] As a further optimization scheme of the present application, a transversely arranged electric guide rail is installed on the workbench, the ultrasonic welding machine is installed on the electric guide rail and is driven to move close to or away from the support by the electric guide rail.
[0018] As a further optimization scheme of the present application, the dust extraction branch pipe is a flexible bellows structure.
[0019] The above technical scheme of the present application has the following beneficial technical effects:
[0020] 1. In the process of welding the battery cell, the first dust removal cover is installed on the welding seat and the second dust removal cover is arranged above the welding head, so as to effectively cover the upper and lower parts of the welding area. When welding, the vacuum generator works to generate vacuum negative pressure, so that the two dust extraction branch pipes generate suction force, the dust is sucked from the first dust removal cover and the second dust removal cover to the dust extraction main pipe, and then is transported to the dust removal machine through the dust guide pipe. This design avoids the problem of dust removal dead angle caused by the complex welding structure and the layout limitation of the dust extraction pipe in the traditional dust removal mode, can more comprehensively remove the dust generated in the welding process, including the metal powder adhered to the tab rubber, thereby improving the welding quality, reducing the adverse effects of dust on the welding quality, improving the safety of the battery, and avoiding the safety hazards caused by dust.
[0021] 2. The ultrasonic welding machine needs to be frequently moved forward and backward, and the loading shell also needs to be driven to move up and down by the cylinder. The connection between the dust extraction branch pipe and the vacuum generator is prone to loosen, which affects the suction effect. Therefore, a leakage prevention assembly is arranged on the vacuum generator, and the leakage prevention assembly wraps the connection between the vacuum generator and the dust extraction branch pipe. When the connection between the dust extraction branch pipe and the vacuum generator leaks gas, the gas immediately enters the leakage prevention assembly. The leakage prevention assembly is connected with a shunt member in communication with the dust extraction main pipe. The leakage gas can be sensed by the gas leakage sensor in the shunt member, and the valve is immediately opened, so that the leakage gas carrying dust enters the dust extraction main pipe through the shunt pipe, and then enters the dust removal machine through the dust guide pipe. The above design effectively solves the problem of looseness of the connection between the dust extraction branch pipe and the vacuum generator during the frequent movement of the ultrasonic welding machine and the up and down movement of the loading shell, ensures the stability and reliability of the dust removal system, maintains the good suction effect, and further guarantees the cleanliness of the welding area. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 A schematic diagram of the overall structure of a dust removal device for butterfly ultrasonic welding of a lithium ion battery according to the present application is shown in FIG. 1.
[0023] Figure 2 A schematic diagram of the structure of an ultrasonic welding machine according to the present application is shown in FIG. 2.
[0024] Figure 3 A schematic diagram of the structure of a first dust cover according to the present application is shown in FIG. 3.
[0025] Figure 4 A schematic diagram of the structure of a leakage prevention assembly according to the present application is shown in FIG. 4.
[0026] Figure 5 A schematic diagram of the overall structure of a dust removal device for butterfly ultrasonic welding of a lithium ion battery according to the present application is shown in FIG. 1. Figure 4 A top view of the overall structure.
[0027] Figure 6 A schematic diagram of the structure of an ultrasonic welding machine according to the present application is shown in FIG. 2. Figure 5 An enlarged view of A in FIG. 2.
[0028] The reference numerals are as follows: 1, worktable; 101, support; 102, reflow jig; 103, electrically driven guide rail; 2, ultrasonic welding machine; 21, loading shell; 22, welding head; 23, welding seat; 24, first dust cover; 25, air cylinder; 3, second dust cover; 4, dust guide pipe; 5, dust extraction main pipe; 6, dust extraction branch pipe; 61, vacuum generator; 7, leakage prevention assembly; 71, arc-shaped cover; 711, side ear; 72, arc-shaped shaft; 73, dismounting member; 731, bolt; 732, nut; 8, flow divider; 81, flow divider pipe; 82, valve; 83, gas leakage sensor. DETAILED DESCRIPTION
[0029] To make the objectives, technical solutions, and advantages of the present application clearer, further detailed descriptions will be given below with reference to the specific embodiments and the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present application. In addition, in the following descriptions, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present application.
[0030] As shown in FIG. 1, a dust removal device for butterfly ultrasonic welding of a lithium ion battery according to the present application includes a worktable 1. Figures 1-6
[0031] The ultrasonic welding machine 2 and the support 101 are sequentially installed on the workbench 1, the ultrasonic welding machine 2 can be close to or away from the support 101, the reflow fixture 102 for fixing the battery cell is installed on the support 101, the first dust removal cover 24 is installed on the ultrasonic welding machine 2 through the welding seat 23, the loading shell 21 located above the welding seat 23 and the driving member for driving the loading shell 21 to move up and down are installed on the ultrasonic welding machine 2, the second dust removal cover 3 and the welding head 22 located below the second dust removal cover 3 are installed on the loading shell 21, the second dust removal cover 3 and the first dust removal cover 24 have the same overall structure but different sizes;
[0032] The dust extraction main pipe 5 is arranged on the side surface of the ultrasonic welding machine 2, two dust extraction branch pipes 6 are connected to the dust extraction main pipe 5, the two dust extraction branch pipes 6 are connected to the first dust removal cover 24 and the second dust removal cover 3 respectively, the vacuum generators 61 are installed on the paths of the two dust extraction branch pipes 6, the two vacuum generators 61 are covered with the anti-leakage assemblies 7, and the shunt members 8 in communication with the dust extraction main pipe 5 are installed on the two anti-leakage assemblies 7.
[0033] In work, the battery cell is first placed on the reflow fixture 102 for fixation, then the ultrasonic welding machine 2 moves towards the support 101, until the welding seat 23 reaches the bottom of the tab of the battery cell, at the same time, the loading shell 21 adjusts the position under the action of the driving member, so that the welding head 22 is in the appropriate welding position at the top of the battery cell, after the welding starts, the vacuum generators 61 on the two dust extraction branch pipes 6 are started to generate vacuum negative pressure, so as to generate suction force from below and above the battery cell welding area respectively for the first dust removal cover 24 and the second dust removal cover 3, so as to suck the metal dust generated in the welding into the dust extraction branch pipe 6, and finally complete the centralized collection, if gas leakage occurs at the connection between the vacuum generator 61 and the dust extraction branch pipe 6, the anti-leakage assembly 7 can collect the leaked gas, then the shunt member 8 is used to guide the leaked gas containing dust into the dust extraction main pipe 5, so as to avoid the dust from escaping, this design can comprehensively cover the welding area, effectively solve the problem of traditional dust removal dead angle, improve the dust collection efficiency, and guarantee the welding quality and battery safety.
[0034] In the embodiment, the first dust removal cover 24 and the second dust removal cover 3 are adjacent to each other and have a horn shape, and two dust extraction holes are arranged at the horn position. The first dust removal cover 24 and the second dust removal cover 3 are provided with dust extraction channels which are communicated with the dust extraction holes. Two dust extraction sub-pipes 6 are communicated with the dust extraction channels in the first dust removal cover 24 and the second dust removal cover 3. When the vacuum generator 61 works to generate negative pressure, the negative pressure is transmitted to the dust extraction channels in the first dust removal cover 24 and the second dust removal cover 3 through the dust extraction sub-pipes 6. Since the adjacent sides of the first dust removal cover 24 and the second dust removal cover 3 have a horn shape, the horn shape can expand the dust absorption range, so that the dust generated in the welding area is more easily absorbed to the horn position. Then, the dust enters the dust extraction channels through the two dust extraction holes on the horn, and then enters the dust extraction sub-pipes 6 through the dust extraction channels, and finally flows into the dust extraction main pipe 5. The design of the above-mentioned double dust extraction holes can increase the dust entering amount per unit time, improve the dust collection speed, and the cooperation of the horn structure and the dust extraction channel can further reduce the residual dust in the welding area. For the dust easily attached to the tab rubber, it can be more effectively sucked and removed, the risk of battery short circuit caused by dust is reduced, and the qualified rate of battery production is improved.
[0035] In the embodiment, the anti-leakage assembly 7 includes two arc-shaped covers 71, an arc-shaped shaft 72 and a dismounting piece 73. The two arc-shaped covers 71 are combined and an anti-leakage cavity is formed in the two arc-shaped covers 71. The two vacuum generators 61 are arranged in the anti-leakage cavities respectively. The arc-shaped shaft 72 is arranged on the dust extraction sub-pipe 6 and covers the two ends of the two arc-shaped covers 71. The two arc-shaped covers 71 are detachably connected through the dismounting piece 73. The shunt 8 is connected with one arc-shaped cover 71 and is communicated with the anti-leakage cavity.
[0036] When the device is assembled, the two arc-shaped covers 71 are covered on the dust extraction sub-pipe 6 through the arc-shaped shaft 72, so that the vacuum generator 61 is located in the anti-leakage cavity formed by the combination of the two arc-shaped covers 71. Then, the two arc-shaped covers 71 are detachably connected and fixed through the dismounting piece 73, so as to ensure the sealing performance of the anti-leakage cavity. When the gas leakage occurs at the connection position between the vacuum generator 61 and the dust extraction sub-pipe 6, the leaked dust-containing gas is limited in the anti-leakage cavity, so as to avoid direct diffusion to the external environment. Since the shunt 8 is communicated with the anti-leakage cavity, the dust-containing gas in the anti-leakage cavity can be guided into the dust extraction main pipe 5 through the shunt 8, so as to realize the secondary collection of the dust in the leaked gas.
[0037] It should be noted that the arc-shaped shaft 72 can be matched with the shape of the dust extraction sub-pipe 6, so as to ensure the tightness of the connection between the arc-shaped cover 71 and the dust extraction sub-pipe 6.
[0038] In this embodiment, the disassembly / assembly component 73 includes a bolt 731 and a nut 732. Side lugs 711 are installed on both sides of the two arc-shaped covers 71. The side lugs 711 on both sides of the two arc-shaped covers 71 fit tightly together. A bolt 731 is threaded through the side lug 711, and a nut 732 is threaded onto the bolt 731 and abuts against the side lug 711. When assembling the leak-proof component 7, the side lugs 711 on both sides of the two arc-shaped covers 71 are aligned and fitted tightly together. Then, the bolt 731 is passed through the threaded hole on the side lug 711, and the nut 732 is screwed onto the bolt 731 until the nut 732 and the side lug 711 are tightly abutted together. The two arc-shaped covers 71 are fixedly connected to form a sealed, leak-proof cavity. This connection method, through the threaded engagement of bolts 731 and nuts 732, provides a stable and adjustable clamping force, ensuring the sealing between the side ears 711 and effectively preventing dust-containing gas in the leak-proof cavity from leaking out from the connection of the side ears 711. When it is necessary to disassemble the arc-shaped covers 71 for maintenance of the vacuum generator 61, simply unscrew the nuts 732 and remove the bolts 731 to separate the two arc-shaped covers 71. The operation is simple and quick, reducing maintenance costs and time costs, and ensuring the convenience of device maintenance and the reliability of subsequent use.
[0039] In this embodiment, the diversion component 8 includes a diversion pipe 81 and a valve 82. The outside of an arc-shaped cover 71 is connected to the diversion pipe 81, which communicates with the anti-leakage cavity. The valve 82 is installed on the diversion pipe 81. When the anti-leakage component 7 is working normally and there is no gas leakage, the valve 82 on the diversion pipe 81 is closed to prevent the negative pressure in the dust extraction main pipe 5 from affecting the stability of the anti-leakage cavity through the diversion pipe 81, and at the same time to prevent outside air from entering the dust extraction main pipe 5 and reducing the dust extraction efficiency. When a leak occurs at the connection between the vacuum generator 61 and the dust extraction branch pipe 6, dust-containing leaked gas accumulates in the anti-leakage cavity. At this time, the valve 82 is opened. Since the dust extraction main pipe 5 is under negative pressure, the dust-containing gas in the anti-leakage cavity enters the dust extraction main pipe 5 through the diversion pipe 81 under the action of pressure difference, thereby realizing the collection of dust in the leaked gas.
[0040] In this embodiment, the diversion component 8 also includes a gas leak sensor 83, which is installed on the inner wall of an arc-shaped cover 71 and located in the leak-proof cavity. The gas leak sensor 83 monitors the gas state in the leak-proof cavity in real time. When a gas leak occurs at the connection between the vacuum generator 61 and the dust extraction pipe 6, the leaked gas enters the leak-proof cavity. After detecting a change in gas concentration or pressure, the gas leak sensor 83 sends a signal indicating a leak. Based on this signal, the operator can promptly open the valve 82 on the diversion pipe 81 to allow the dust-containing leaked gas in the leak-proof cavity to enter the dust extraction main pipe 5 through the diversion pipe 81. The addition of the gas leak sensor 83 enables real-time monitoring and early warning of leaks, preventing dust from escaping from the leaked gas due to untimely manual inspections. This improves the device's response speed and processing efficiency to leaks, ensures that the dust removal system is always in good working condition, and reduces the impact of dust on the environment and battery production quality.
[0041] In this embodiment, the top end of the main dust extraction pipe 5 is connected to a dust guide pipe 4, which is used to connect to the dust collector. During the dust removal process, the main dust extraction pipe 5 collects dust-laden gas from the two dust extraction branch pipes 6. Since the dust guide pipe 4 at the top end of the main dust extraction pipe 5 is connected to the external dust collector, the negative pressure generated by the dust collector further enhances the suction of the entire dust removal system, allowing the dust-laden gas in the main dust extraction pipe 5 to smoothly pass through the dust guide pipe 4 into the dust collector. The dust collector filters and separates the dust-laden gas, collects the dust, and discharges the purified gas.
[0042] In this embodiment, the driving component includes a cylinder 25, which is installed on the top of the ultrasonic welding machine 2. The loading shell 21 is connected to the driving end of the cylinder 25 and is driven to move up and down. When it is necessary to adjust the position of the welding head 22 to adapt to different thicknesses of battery cells or different welding requirements, the cylinder 25 is activated, and its driving end drives the loading shell 21 to move up and down. When the loading shell 21 moves, it synchronously drives the second dust cover 3 and the welding head 22 installed on it to move together until the welding head 22 reaches the appropriate welding height.
[0043] In this embodiment, a horizontally arranged electric guide rail 103 is installed on the workbench 1. The ultrasonic welding machine 2 is installed on the electric guide rail 103 and is driven by it to move closer to or away from the support 101. Before welding, the electric guide rail 103 is started, driving the ultrasonic welding machine 2 installed on it to move laterally towards the support 101 until the welding seat 23 and welding head 22 on the ultrasonic welding machine 2 reach the welding position corresponding to the battery cell fixed on the support 101. After welding is completed, the electric guide rail 103 drives the ultrasonic welding machine 2 to move away from the support 101 so that the worker can remove the welded battery cell and place a new battery cell to be welded.
[0044] In this embodiment, the dust extraction pipe 6 is a flexible corrugated pipe structure. When the ultrasonic welding machine 2 moves laterally on the electric guide rail 103, or the loading shell 21 moves up and down under the drive of the cylinder 25, the dust extraction pipe 6, due to its flexible corrugated pipe structure, can flexibly bend, stretch, or contract with the movement of the ultrasonic welding machine 2 and the loading shell 21. This avoids breakage, twisting, or loosening of the connection of the dust extraction pipe 6 due to the movement of the components. The flexible corrugated pipe structure can also reduce the resistance of the dust extraction pipe 6 during the movement process, without affecting the normal movement of the ultrasonic welding machine 2 and the loading shell 21.
[0045] The specific working principle of this invention is as follows:
[0046] The lithium-ion battery cell to be welded is placed on the reflow fixture 102 and fixed. Then, the electric guide rail 103 is started, which drives the ultrasonic welding machine 2 to move laterally towards the support 101 until the welding seat 23 reaches a suitable position below the bottom of the cell tab. Then, the cylinder 25 is started, and its drive end drives the loading shell 21 to move downward. The loading shell 21 simultaneously drives the welding head 22 and the second dust cover 3 to move downward, so that the welding head 22 is located at a suitable welding position above the top of the cell tab. At this time, the first dust cover 24 is located below the bottom of the cell tab, and the second dust cover 3 is located above the top of the cell tab. The two are aligned with the welding area from the top and bottom sides respectively.
[0047] The ultrasonic welding machine 2 is started, and the welding head 22 and the welding base 23 cooperate to perform butterfly ultrasonic welding on the battery cell tabs. At the same time, the vacuum generators 61 on the two dust extraction pipes 6 are started, generating a vacuum negative pressure. The negative pressure is transmitted through the dust extraction pipes 6 to the dust extraction channels of the first dust removal hood 24 and the second dust removal hood 3 respectively. Since the first dust removal hood 24 and the second dust removal hood 3 are flared on the adjacent side and have dust extraction holes, the metal dust generated by welding enters the dust extraction channel from the upper and lower sides through the dust extraction holes under the action of negative pressure, and then enters the dust extraction pipe 6 through the dust extraction channel.
[0048] Dust-laden gas in the dust extraction branch pipe 6 is collected into the dust extraction main pipe 5. The dust guide pipe 4 at the top of the dust extraction main pipe 5 is connected to the external dust collector. Under the negative pressure of the dust collector, the dust-laden gas enters the dust collector through the dust guide pipe 4. The dust collector filters the gas, collects the dust, and the purified gas is discharged.
[0049] During welding and dust removal, the gas leak sensor 83 monitors the gas status in the leak-proof cavity of the leak-proof component 7 in real time. If a gas leak occurs at the connection between the vacuum generator 61 and the dust extraction pipe 6, the leaked dust-containing gas enters the leak-proof cavity. After the gas leak sensor 83 detects the leak, it sends a signal. The operator or the automatic control system opens the valve 82 on the diversion pipe 81. Under the negative pressure of the dust extraction main pipe 5, the dust-containing gas in the leak-proof cavity enters the dust extraction main pipe 5 through the diversion pipe 81, and then enters the dust collector along with other dust-containing gases through the dust guide pipe 4 to prevent dust from escaping.
[0050] After welding is completed, the ultrasonic welding machine 2 stops working. The cylinder 25 drives the loading shell 21, welding head 22 and second dust removal hood 3 to move up and reset. The electric guide rail 103 drives the ultrasonic welding machine 2 away from the support 101 and resets. The operator opens the reflow fixture 102, takes out the welded battery cell, puts in a new battery cell to be welded, and repeats the above process for the next welding and dust removal operation.
[0051] The embodiments of the present invention have been described above, but the embodiments are not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the embodiments described above, all of which are within the protection scope of the embodiments described above.
Claims
1. A dust removal device for ultrasonic welding of lithium-ion batteries in a butterfly configuration, characterized in that, Including the workbench (1); An ultrasonic welding machine (2) and a support (101) are installed sequentially on the workbench (1), and the ultrasonic welding machine (2) can move closer to or further away from the support (101). A reflow fixture (102) for fixing the battery cell is installed on the support (101). A first dust cover (24) is installed on the ultrasonic welding machine (2) through a welding base (23). A loading shell (21) located above the welding base (23) and a driving component for moving it up and down are installed on the ultrasonic welding machine (2). A second dust cover (3) and a welding head (22) located below the second dust cover (3) are installed on the loading shell (21). The second dust cover (3) and the first dust cover (24) have the same overall structure but different dimensions. The ultrasonic welding machine (2) is provided with a dust extraction main pipe (5) on its side. Two dust extraction branch pipes (6) are connected to the dust extraction main pipe (5). The two dust extraction branch pipes (6) are respectively connected to the first dust removal hood (24) and the second dust removal hood (3). Vacuum generators (61) are installed on the paths of the two dust extraction branch pipes (6). Both vacuum generators (61) are covered with anti-leakage components (7). Both anti-leakage components (7) are equipped with diverter components (8) that are connected to the dust extraction main pipe (5).
2. The dust removal device for ultrasonic welding of lithium-ion batteries according to claim 1, characterized in that, The first dust removal hood (24) and the second dust removal hood (3) are both formed into a funnel shape on their adjacent sides, and two dust extraction holes are opened at the funnel positions. The first dust removal hood (24) and the second dust removal hood (3) are both provided with dust extraction channels that communicate with the dust extraction holes. Two dust extraction pipes (6) are respectively connected to the dust extraction channels in the first dust removal hood (24) and the second dust removal hood (3).
3. The dust removal device for ultrasonic welding of lithium-ion batteries according to claim 1, characterized in that, The leak-proof component (7) includes two arc-shaped covers (71), an arc-shaped shaft (72), and a disassembly / assembly component (73). The two arc-shaped covers (71) are joined together and form a leak-proof cavity therein. Two vacuum generators (61) are respectively placed in the two leak-proof cavities. Arc-shaped shafts (72) covering the dust extraction pipes (6) are installed at both ends of the two arc-shaped covers (71). The two arc-shaped covers (71) are detachably connected to each other through the disassembly / assembly component (73). The diverter (8) is connected to one arc-shaped cover (71) and the diverter (8) is in communication with the leak-proof cavity.
4. The dust removal device for ultrasonic welding of lithium-ion batteries according to claim 3, characterized in that, The disassembly / assembly component (73) includes a bolt (731) and a nut (732). Both sides of the two arc-shaped covers (71) are equipped with side ears (711). The side ears (711) on both sides of the two arc-shaped covers (71) fit tightly together. The bolt (731) is threaded through the side ears (711), and the nut (732) that abuts against the side ears (711) is threaded on the bolt (731).
5. The dust removal device for ultrasonic welding of lithium-ion batteries according to claim 3, characterized in that, The diversion component (8) includes a diversion pipe (81) and a valve (82). An arc-shaped cover (71) is connected to the outside of the diversion pipe (81) which communicates with the leak-proof cavity. The valve (82) is installed on the diversion pipe (81).
6. The dust removal device for ultrasonic welding of lithium-ion batteries according to claim 5, characterized in that, The diverter (8) also includes a gas leak sensor (83), which is mounted on the inner wall of an arc-shaped cover (71) and located in a leak-proof cavity.
7. The dust removal device for ultrasonic welding of lithium-ion batteries according to claim 1, characterized in that, The top end of the dust extraction main pipe (5) is connected to a dust guide pipe (4), and the dust guide pipe (4) is used to connect to the dust collector.
8. The dust removal device for ultrasonic welding of lithium-ion batteries according to claim 1, characterized in that, The driving component includes a cylinder (25) which is mounted on the top of the ultrasonic welding machine (2). The loading shell (21) is connected to the driving end of the cylinder (25) and is driven by it to move up and down.
9. A dust removal device for ultrasonic welding of lithium-ion batteries in the form of butterflies according to claim 1, characterized in that, The workbench (1) is equipped with a horizontally arranged electric guide rail (103), and the ultrasonic welding machine (2) is mounted on the electric guide rail (103) and driven by it to move closer to or away from the support (101).
10. A dust removal device for ultrasonic welding of lithium-ion batteries according to claim 1, characterized in that, The dust extraction pipe (6) has a flexible corrugated pipe structure.