Dust collection type dust removal device

Abstract

The utility model belongs to the technical field of welding process cleaning, and relates to a dust collection type dust removal device. The utility model provides a dust collection type dust removal device which aims at solving the technical problem that in the prior art, a dust collection type dust removal device cannot completely block dust from entering a to-be-welded part or cannot efficiently remove splashed dust, and consequently the dust removal effect is not ideal, and comprises a spot welding machine provided with a welding head and a welding base. The dust removal assembly is arranged on the spot welding machine; the dust removal assembly comprises an upper dust collection assembly connected with the welding seat; the to-be-welded part, the welding head, the welding seat and the upper dust collection assembly are coaxially arranged in the vertical direction; the upper dust collection assembly comprises a dust removal cavity; the dust removal cavity comprises a dust baffle, a dust collection channel and a dust collection area. The dust blocking plate prevents dust from entering the battery cell, the baffle is additionally arranged between the welding position and the to-be-welded part, welding dust is effectively prevented from directly flying into the to-be-welded part, and when the welding part is a battery cell assembly, the situation that the short circuit rate of a battery is increased and self-discharge is increased due to the dust is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to welding process cleaning technical field, specifically, relate to dust collection type dust collector. BACKGROUND

[0002] With the rapid development of new energy vehicles and electronic equipment, lithium ion batteries as the core power source, its production and manufacturing process has been widely concerned. The design and manufacture of power battery pole piece is one of the key links affecting battery performance. In order to improve the discharge rate of battery and reduce the internal resistance, the pole piece usually adopts multi-pole ear structure. This design can effectively improve the conductivity and thermal management ability of the battery, thereby enhancing the overall performance of the battery.

[0003] In the manufacturing process of power battery pole ear, ultrasonic welding technology is widely used due to its high efficiency, cleanliness, no spark and other advantages. Ultrasonic welding realizes solid-state connection between metals through high-frequency vibration energy, without additional welding materials, which can ensure the high conductivity and mechanical strength of the welding point. However, a large amount of metal dust will be generated during the ultrasonic welding process, which is mainly composed of small particles of pole ear materials such as copper and aluminum. If these dusts are not cleaned in time, they may have a serious impact on the battery production environment and product quality. Dust may fly into the workshop, polluting the working environment and increasing the risk of fire and dust explosion. More importantly, dust may enter the inside of the battery roll core, causing the short circuit rate of the battery to increase, the self-discharge to increase, and thus affecting the safety and service life of the battery. Therefore, how to effectively control and remove the dust generated during the ultrasonic welding process has become a problem to be solved in the battery manufacturing industry.

[0004] To address the aforementioned technical problems, various dust removal devices exist in the prior art. For example, the Chinese Utility Model Authorization Announcement No. CN219254466U, filed on March 17, 2023, entitled "A Dust Removal Device for Ultrasonic Welding of Battery Tabs," discloses a dust removal mechanism comprising a dust removal hood, a dust collection component, and an air blowing component. The dust removal hood is equipped with the dust collection component and the air blowing component. The output end of the air blowing component and the input end of the dust collection component are located inside the dust removal hood. The output end of the air blowing component is positioned above the input end of the dust collection component. The output end of the air blowing component can blow air towards the welding area; the input end of the dust collection component can suck dust towards the welding area. In this device, the air blowing component can blow positive pressure airflow towards the dust-generating point, directing the dust into the dust collection component. Simultaneously, because the input end below the dust collection component is under negative pressure, a downward airflow is present above the gap, preventing dust escape. Furthermore, the downward airflow counteracts the upward suction force, preventing vibration of the welding area, thus ensuring that increasing the dust removal airflow velocity does not affect the welding process. However, the following problems exist with this solution: (1) Insufficient dust blocking around the electrode tab. The device mainly controls dust through the synergistic effect of the blowing component and the dust suction component, but the design of its dust hood may not be able to completely cover the area around the electrode tab. Especially during the electrode tab welding process, dust may escape from the edge of the dust hood and enter the workshop environment or the inside of the core. (2) Dust escape risk. Since there may be gaps between the dust hood and the welding area, dust may escape along the gaps under the action of airflow. Especially when running at high wind speed, the escape risk is further increased.

[0005] Existing dust control methods mainly involve installing dust hoods in the welding area or using industrial dust collectors. However, these methods often have limitations, such as unsatisfactory dust collection effects, inability to completely cover the welding area, or interference with the welding process. Therefore, developing an ultrasonic welding dust removal device that can effectively block and collect dust is of great significance for improving battery production quality and safety. Summary of the Invention

[0006] 1. The problem to be solved

[0007] In view of the technical problem that existing dust collection devices cannot completely prevent dust from entering the interior of the workpiece to be welded, or cannot efficiently remove splashed dust, resulting in unsatisfactory dust removal effect, this utility model provides a dust collection device.

[0008] 2. Technical Solution

[0009] To solve the above problems, the technical solution provided by this utility model is as follows:

[0010] Based on the purpose of this utility model, this utility model provides a dust collection device, including a spot welding machine equipped with a welding head and a welding seat, and a dust collection component disposed on the spot welding machine; the dust collection component includes an upper dust collection component connected to the welding seat; the workpiece to be welded and the welding head, welding seat, and upper dust collection component are coaxially arranged in the vertical direction;

[0011] The upper dust collection assembly includes a dust collection chamber; the dust collection chamber includes a dust baffle, a dust collection channel, and a dust collection area.

[0012] According to any embodiment of the present invention, the dust collection device further includes a negative pressure dust collection pipe; the negative pressure dust collection pipe is connected to the dust collection channel.

[0013] The connection design between the negative pressure dust collection duct and the dust collection channel utilizes the principle of high negative pressure to quickly draw dust generated during the welding process into the system, reducing dust drift and diffusion in the air, thereby effectively reducing dust pollution to the workshop environment. The design of the negative pressure dust collection duct alters the direction of dust movement, making dust movement more regular and facilitating centralized collection and processing. This design not only improves dust collection efficiency but also reduces the possibility of dust escape. The combined design of the negative pressure dust collection duct and the dust collection channel is compact, reducing space occupation and facilitating installation and integration into existing ultrasonic welding equipment, while also reducing equipment complexity and maintenance costs.

[0014] According to any embodiment of the present invention, the dust collection channel is located obliquely below the dust collection chamber and behind the workpiece to be welded.

[0015] By optimizing the layout of the dust extraction channel and positioning it diagonally downwards behind the battery cell tabs, negative pressure airflow is prevented from blowing directly onto the tabs, thus preventing the tabs from shifting due to airflow and ensuring the stability and quality of the welding process.

[0016] According to any embodiment of the present invention, the dust collection device has a hole in the top wall of the dust collection chamber, and the welding seat passes through the hole.

[0017] The dust removal chamber has a hole in its top wall, through which the welding socket passes. This design allows the welding socket to be precisely positioned and fixed inside the dust removal chamber, ensuring that welding operations are carried out within the effective coverage area of ​​the dust removal device. This design not only improves the stability of the welding process but also enhances dust removal efficiency, effectively preventing dust from escaping and further optimizing the welding environment and the reliability of battery production.

[0018] According to any embodiment of the present invention, the dust collection device includes a first dust collection chamber and a second dust collection chamber.

[0019] The design of dividing the dust collection chamber into a first dust collection chamber and a second dust collection chamber is primarily for ease of processing and assembly. This modular structure simplifies the manufacturing process, reduces processing difficulty, and facilitates equipment installation and maintenance. For example, when cleaning or replacing dust collection components is required, one chamber can be operated individually without disassembling the entire device, thereby improving maintenance efficiency and reducing equipment maintenance costs.

[0020] The dust collection device according to any embodiment of the present invention further includes a lower dust collection component connected to the welding head.

[0021] By installing a lower suction component below the welding head, the welding area can be more comprehensively covered, effectively capturing dust generated during the welding process, especially dust escaping from below the welding head. This dual suction design (with the upper and lower suction components working together) significantly improves dust removal efficiency, reduces the residence time of dust in the welding area, thereby reducing the risk of dust entering the battery cell and further improving welding quality and battery safety. Furthermore, the lower suction component optimizes the overall suction effect, preventing dust from being re-entrained due to airflow turbulence.

[0022] According to any embodiment of the present invention, the dust collection device includes a lower dust collection pipe, a first connector fixed on the welding head bracket, and a second connector connected to the lower dust collection pipe.

[0023] The slotted design of the connector allows the lower suction duct to be flexibly adjusted to better adapt to the location and direction of dust generation during welding, thus improving dust capture efficiency. This adjustability not only enhances the adaptability of the dust removal device to different welding conditions but also allows for precise positioning of the suction port according to actual needs, further optimizing the dust collection effect, reducing dust escape, and ultimately improving welding quality and battery production reliability.

[0024] According to any embodiment of the present invention, the dust collection device has a duckbill-shaped lower suction pipe.

[0025] The duckbill-style suction pipe features a unique flat opening structure that effectively increases the suction area. Its shape also allows it to better approach the welding area, precisely capturing dust generated during welding. Furthermore, the opening shape optimizes airflow, enabling dust to be drawn into the pipe more regularly, reducing dust escape and significantly improving dust removal efficiency. This design not only improves the cleanliness of the welding environment but also reduces the impact of dust on the welding quality of battery tabs, further ensuring the reliability and safety of battery production.

[0026] According to any embodiment of the present invention, the dust collection device is a battery cell assembly; the battery tabs on the battery cell assembly and the welding head, welding base and upper dust collection assembly are arranged coaxially in the vertical direction.

[0027] By arranging the battery tabs, welding head, welding socket, and dust collection component coaxially in the vertical direction, precise positioning during the welding process can be ensured, welding deviations reduced, and welding quality and efficiency improved. The coaxial arrangement allows the dust collection component to be closer to the welding area, effectively capturing dust generated during welding and preventing it from escaping into the battery cell or the workshop environment, thereby reducing the impact of dust on battery performance and minimizing the risk of short circuits. This arrangement also makes the entire welding and dust removal device more compact, reducing the space occupied by the equipment and facilitating efficient operation within limited production spaces.

[0028] According to any embodiment of the present invention, in the working state, the welding head is close to the battery tab; the dust baffle is close to the other side tab, blocking the gap between the tab pressure plate and the gap of the tab connecting piece itself.

[0029] By ensuring the welding head is close to the battery tabs, the precision and efficiency of the welding operation are guaranteed. At the same time, the tight fit and shielding function of the dust baffle effectively prevents dust generated during the welding process from entering the battery cell through the gaps between the tab pressure plate and the connecting piece. This avoids problems such as battery short circuits and increased self-discharge caused by dust pollution, and significantly improves the battery welding quality and the safety and reliability of the production process.

[0030] 3. Beneficial effects

[0031] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0032] This utility model discloses a dust collection device, comprising a dust collection assembly mounted on the spot welding machine. The dust collection assembly includes an upper dust collection assembly. The workpiece to be welded, the welding head, the welding seat, and the upper dust collection assembly are coaxially arranged in the vertical direction. The upper dust collection assembly includes a dust collection chamber; the dust collection chamber includes a dust baffle, a dust collection channel, and a dust collection area. The dust baffle prevents dust from entering the battery cell. Adding a baffle between the welding position and the workpiece to be welded effectively prevents welding dust from directly entering the workpiece. When the workpiece to be welded is a battery cell assembly, it avoids increased battery short-circuit rate and increased self-discharge due to dust. Attached Figure Description

[0033] Figure 1 This is a first-view structural schematic diagram of the dust collection device in the embodiment;

[0034] Figure 2 This is a first-view structural diagram of the upper dust collection component in the embodiment;

[0035] Figure 3 This is a schematic diagram of the battery cell assembly structure;

[0036] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure along line AA;

[0037] Figure 5 This is a first-view structural diagram of the dust removal chamber;

[0038] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure along line AA;

[0039] Figure 7 This is a schematic diagram of the cross-sectional structure of the dust removal chamber from a second perspective.

[0040] Figure 8 This is a first-person view structural diagram of the lower suction component;

[0041] Figure 9 This is a first-person view structural diagram of the lower suction duct.

[0042] Figure 10 for Figure 9 Schematic diagram of the cross-sectional structure along line AA;

[0043] Figure 11 This is a schematic diagram of the second-view structure of the dust collection device in the embodiment.

[0044] In the picture:

[0045] 1: Spot welding machine; 11: Welding head; 12: Welding socket;

[0046] 2: Dust removal assembly; 21: Upper dust collection assembly; 22: Lower dust collection assembly;

[0047] 3: Battery cell assembly; 31: Gap in the electrode connecting piece itself; 32: Gap between electrode pressure plates.

[0048] 4: Dust removal chamber; 41: First dust removal chamber; 411: Dust baffle; 412: Suction channel; 413: Suction area; 42: Second dust removal chamber;

[0049] 5: Negative pressure dust collection pipe;

[0050] 6: Mounting plate;

[0051] 7: Connecting column;

[0052] 8: Bottom suction duct;

[0053] 9: Second connector;

[0054] 10: First connector. Detailed Implementation

[0055] The present invention will be further described below with reference to specific embodiments.

[0056] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0057] Example

[0058] The dust collection device in this embodiment, such as Figures 1-11 As shown, a spot welding machine 1 includes a welding head 11 and a welding base 12, and also includes a dust removal assembly 2 disposed on the spot welding machine 1. In this embodiment, the spot welding machine 1 is an ultrasonic spot welding machine.

[0059] The dust removal assembly 2 includes an upper dust suction assembly 21 connected to the welding base 12 and a lower dust suction assembly 22 connected to the welding head 11. The upper dust suction assembly 21 and the lower dust suction assembly 22 are respectively fixed to the welding base 12 and the welding head 11 via connectors, and remain relatively stationary with the welding base 12 and the welding head 11, moving up and down together with them. Applying the dust suction device of this application to the field of battery cell assembly welding, this design ensures that the dust suction assembly accurately covers the welding area, effectively capturing dust generated during the welding process and preventing it from escaping or entering the battery cell, thereby significantly improving dust removal efficiency, reducing the impact of dust on welding quality and battery performance, optimizing the welding environment, and reducing maintenance costs, demonstrating high practicality and adaptability.

[0060] The workpiece to be welded, the welding head 11, the welding seat 12, and the upper dust collection assembly 21 are arranged coaxially in the vertical direction. In this embodiment, the workpiece to be welded is a battery cell assembly 3; the battery tabs on the battery cell assembly 3, the welding head 11, the welding seat 12, and the upper dust collection assembly 21 are arranged coaxially in the vertical direction. The upper dust collection assembly 21 has a circular hole in the middle through which the welding seat 11 passes, and is located above the battery cell assembly 3. The lower dust collection assembly 22 is attached to one side of the welding head 11 and is located below the battery cell assembly 3. This coaxial arrangement and the layout of the upper and lower dust collection assemblies can ensure precise positioning and efficient dust removal during the welding process, making the welding operation more stable. At the same time, it effectively prevents dust from entering the battery cell, avoiding battery short circuits and self-discharge problems caused by dust contamination, and significantly improving the battery welding quality and the safety and reliability of the production process.

[0061] The upper dust collection assembly 21 includes a dust collection chamber 4, a negative pressure dust collection pipe 5, a mounting plate 6, and a connecting column 7. The dust collection chamber 4 is fixed to the mounting plate 6, which is then fixed to the welding base mounting plate of the welding machine via screws through the connecting column 7. During operation, the internal cylinder of the ultrasonic spot welding machine 1 drives the welding base 12 to reciprocate together with the upper dust collection assembly 21. This design not only ensures the stability of the dust collection assembly during welding but also efficiently captures welding dust through the negative pressure dust collection pipe, preventing it from escaping and polluting the battery cells and the workshop environment. Simultaneously, its modular assembly method facilitates installation and maintenance, reduces equipment operating costs, and improves the overall efficiency and reliability of welding dust removal.

[0062] The dust removal chamber 4 includes a dust baffle 411, a dust suction channel 412, and a dust suction area 413; the negative pressure dust suction pipe 5 is connected to the dust suction channel 412. The dust suction channels 412, located on the left and right sides inside the dust removal chamber 4, are situated diagonally below the chamber 4, behind and to the side of the battery cell tabs (i.e., the parts to be welded). This reduces the direct airflow during dust suction, preventing the tabs from shaking and affecting the welding effect. Simultaneously, it avoids negative pressure airflow causing air vortices within the dust suction area 413, preventing dust from circulating within the dust removal area and being sucked away through the dust suction pipe, thus reducing dust removal efficiency.

[0063] To facilitate processing, the dust removal chamber 4 is divided into two parts: a first dust removal chamber 41 and a second dust removal chamber 42, which are fixed together with screws. This also facilitates cleaning, maintenance, and replacement of the dust removal chambers, further extending the equipment's service life, reducing maintenance costs, and enhancing the practicality and economy of the device.

[0064] The dust removal chamber 4 has a hole in its top wall, through which the welding seat 12 passes. During welding, the hole is positioned directly above the electrode tab. The lower dust collection assembly 22 includes a lower dust collection pipe 8, a first connector 10 fixed on the welding head bracket, and a second connector 9 connecting the lower dust collection pipe 8. By providing a through hole in the top wall of the dust removal chamber, the welding seat can be precisely positioned and pass through it, ensuring the stability of the welding operation and providing a direct dust capture path for the welding process. The design of the lower dust collection assembly allows for flexible fixation through the connectors, and the dust collection effect can be optimized by adjusting the position of the connectors, further improving dust collection efficiency and reducing the impact of dust emission on welding quality and the workshop environment. The lower dust collection assembly 22 remains relatively stationary with the welding head 12, moving up and down together with the cylinder inside the welding machine. The connectors are all slotted, allowing the lower dust collection pipe 8 to be adjusted in position up, down, left, and right. The lower suction pipe 8 has a "duckbill" design to increase the suction speed. The suction port is flat and close to the welding head 11. During welding, the duckbill suction port goes deep into the welding position, and the dust generated during welding is directly sucked away by the suction port.

[0065] In operation, the welding head 11 is close to the battery tab; the dust baffle 411 is close to the other tab, blocking the gap 32 between the tab pressure plate and the gap 31 of the tab connecting piece itself, effectively reducing the probability of the core being contaminated by dust.

Claims

1. A dust collection device, comprising a spot welding machine (1) equipped with a welding head (11) and a welding seat (12), characterized in that: It also includes a dust removal assembly (2) installed on the spot welding machine (1); the dust removal assembly (2) includes an upper dust suction assembly (21) connected to the welding seat (12); the workpiece to be welded, the welding head (11), the welding seat (12), and the upper dust suction assembly (21) are arranged coaxially in the vertical direction; The upper dust collection assembly (21) includes a dust collection chamber (4); the dust collection chamber (4) includes a dust baffle (411), a dust collection channel (412), and a dust collection area (413).

2. The dust collection device according to claim 1, characterized in that: The upper suction assembly (21) also includes a negative pressure suction pipe (5); the negative pressure suction pipe (5) is connected to the suction channel (412).

3. The dust collection device according to claim 2, characterized in that: The dust extraction channel (412) is located diagonally below the dust removal chamber (4) and behind the workpiece to be welded.

4. The dust collection device according to claim 3, characterized in that: The dust removal chamber (4) has a hole on its top wall, and the welding seat (12) passes through the hole.

5. The dust collection device according to claim 4, characterized in that: The dust removal chamber (4) includes a first dust removal chamber (41) and a second dust removal chamber (42).

6. The dust collection device according to claim 1, characterized in that: It also includes a lower dust collection assembly (22) connected to the welding head (11).

7. The dust collection device according to claim 6, characterized in that: The lower suction assembly (22) includes a lower suction pipe (8), a first connector (10) fixed on the welding head bracket, and a second connector (9) connected to the lower suction pipe (8).

8. The dust collection device according to claim 7, characterized in that: The lower suction pipe (8) is duckbill type.

9. The dust collection device according to any one of claims 1-8, characterized in that: The component to be welded is a battery cell assembly (3); the battery tabs on the battery cell assembly (3) and the welding head (11), welding seat (12) and upper dust collection assembly (21) are arranged coaxially in the vertical direction.

10. The dust collection device according to claim 9, characterized in that: In operation, the welding head (11) is close to the battery tab; the dust baffle (411) is close to the other tab, blocking the gap (32) between the tab pressure plates and the gap (31) between the tab connecting piece itself.

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