Dust removal device and welding apparatus having the same

Abstract

This invention provides a dust removal device and a welding equipment having the same. The dust removal device has a base with a dust collection chamber; a housing is mounted on the base, and the housing's air inlet, air outlet, and dust discharge port are all connected to the dust removal chamber. The housing has an air inlet connected to the air inlet and an air outlet connected to the air outlet, and the dust discharge port is connected to the dust collection chamber. A dust removal assembly is mounted on the housing and located within the dust removal chamber. The dust removal assembly includes a discharge structure and a dust collection structure arranged opposite to each other. The discharge structure is located on the side of the dust collection structure closer to the air inlet. The discharge structure and the dust collection structure are connected to a power source to present opposite electrodes, thereby forming an electric field between the discharge structure and the dust collection structure for collecting impurities. The height H1 of the air outlet and the height H2 of the air inlet satisfy the condition: H2 < H1. This invention effectively solves the problem of poor dust removal performance in the welding process of lithium battery tabs in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of dust removal technology, and more specifically, to a dust removal device and welding equipment having the same. Background Technology

[0002] Currently, dust refers to solid particles suspended in the air. Dust is commonly referred to by many names, such as dust, grime, smoke, mineral dust, sand, and powder, without clear boundaries. The International Organization for Standardization (ISO) defines dust as solid suspended matter with a particle size of less than 75 μm. In industrial production, especially in lithium battery manufacturing, dust affects the voltage drop of lithium-ion batteries per unit time, thus impacting battery quality. In severe cases, the accumulation of dust generated in various processes can easily lead to explosions. Particularly in the lithium battery tab welding process, during ultrasonic welding, when two welding heads connect the tabs, metallic dust is easily generated. If this dust is not cleaned promptly, it can easily cause short circuits or poor contact in the battery, thereby affecting battery safety.

[0003] In existing technologies, manual cleaning is usually used to remove dust from ultrasonic welding machines in order to reduce the impact of dust in the lithium battery tab welding process.

[0004] Furthermore, manual cleaning is labor-intensive and inefficient, and it is difficult to ensure thorough and continuous dust removal during frequent operations, which fails to meet the requirements of high-efficiency production, resulting in poor dust removal performance of ultrasonic welding machines. Utility Model Content

[0005] The main objective of this invention is to provide a dust removal device and welding equipment having the same, so as to solve the problem of poor dust removal effect in the welding process of lithium battery tabs in the prior art.

[0006] To achieve the above objectives, according to one aspect of the present invention, a dust removal device is provided, comprising: a base having a dust collection chamber; a housing disposed on the base, the housing having an air inlet channel, an air outlet channel, a dust discharge port, and the dust removal chamber, the air inlet channel, the air outlet channel, and the dust discharge port all communicating with the dust removal chamber, the housing having an air inlet communicating with the air inlet channel and an air outlet communicating with the air outlet channel, the dust discharge port communicating with the dust collection chamber; and a dust removal assembly disposed on the housing and located within the dust removal chamber, the dust removal assembly including a discharge structure and a dust collection structure disposed opposite to each other, the discharge structure being located on the side of the dust collection structure closer to the air inlet channel, the discharge structure and the dust collection structure being connected to a power source to present opposite electrodes, thereby forming an electric field between the discharge structure and the dust collection structure for collecting impurities; wherein, the height H1 of the air outlet channel and the height H2 of the air inlet channel satisfy the condition: H2 < H1.

[0007] Furthermore, the discharge structure includes: a filter plate disposed on the housing and disposed opposite to at least a portion of the air inlet channel to filter impurities entering through the air inlet; and a discharge element disposed on the filter plate and located on the side of the filter plate away from the air inlet channel, the discharge element being used to release positive or negative charges so that the impurities carry positive or negative charges.

[0008] Furthermore, the dust collection structure includes: a dust collection plate disposed on the housing and located on the side of the discharge structure away from the air inlet channel; a discharge section disposed on the dust collection plate, the discharge section being used to discharge the dust collection plate so that the dust collection plate carries positive or negative charges; wherein, at least a portion of the dust collection plate is made of conductive material.

[0009] Furthermore, the dust removal device also includes a filter screen, which is installed on the housing and located between the dust removal chamber and the air outlet duct, so that impurities after being removed by the dust removal components are filtered by the filter screen before entering the air outlet duct.

[0010] Furthermore, the air inlet includes a first air inlet end face and a second air inlet end face spaced apart along the air inlet direction, and the diameter D1 of the first air inlet end face and the diameter D2 of the second air inlet end face satisfy the condition: D2 < D1; the air outlet includes a first air outlet end face and a second air outlet end face spaced apart along the opposite direction to the air outlet direction, and the diameter D3 of the first air outlet end face and the diameter D4 of the second air outlet end face satisfy the condition: D4 < D3.

[0011] Furthermore, the housing also includes at least two oppositely arranged mounting plates, one end of which is connected to the inner wall of the housing, and the other end of which is connected to the outer wall of at least part of the air outlet duct to support the air outlet duct.

[0012] Furthermore, the mounting plate and at least part of the inner wall of the housing form a mounting cavity, and at least part of the air outlet channel is located in the mounting cavity. The air outlet channel includes a first sub-channel and a second sub-channel that are interconnected. The first sub-channel and the second sub-channel are set at an angle, and the end of the first sub-channel away from the second sub-channel is connected to the dust removal chamber.

[0013] Furthermore, the dust discharge port includes a first dust discharge end face and a second dust discharge end face that are spaced apart along the exhaust direction, and the width W1 of the first dust discharge end face and the width W2 of the second dust discharge end face satisfy the condition: W1 < W2.

[0014] Furthermore, the dust discharge port is equipped with an adsorption component to adsorb impurities that fall into the dust removal chamber.

[0015] According to another aspect of the present invention, a welding device is provided, which includes a welding platform and a dust removal device. The welding platform is used to weld the workpiece to be welded, and the dust removal device is located on one side of the welding platform to remove dust from impurities generated during the welding process. The dust removal device is the aforementioned dust removal device.

[0016] The dust removal device, using the technical solution of this utility model, has a dust collection chamber on its base. A housing is mounted on the base and includes an air inlet channel, an air outlet channel, a dust discharge port, and the dust collection chamber. The air inlet channel, air outlet channel, and dust discharge port are all connected to the dust collection chamber. The housing has an air inlet communicating with the air inlet channel and an air outlet communicating with the air outlet channel. The dust discharge port is connected to the dust collection chamber. A dust removal assembly is mounted on the housing and located within the dust collection chamber. The dust removal assembly includes a discharge structure and a dust collection structure arranged opposite to each other. The discharge structure is located on the side of the dust collection structure closer to the air inlet channel. The discharge structure and the dust collection structure are connected to a power source and are arranged with opposite electrodes to form an electric field between them for collecting impurities. The height H1 of the air outlet channel and the height H2 of the air inlet channel satisfy the condition: H2 < H1. Thus, during the welding process of the lithium battery tabs, the above arrangement allows the welding gas to enter the air inlet channel through the air inlet and smoothly enter the dust collection chamber through the air inlet channel. In the dust removal chamber, the opposing discharge and dust collection structures form an electrostatic field. When gas flows through the discharge structure, impurities are given the same charge as the discharge structure. Under the strong influence of the electrostatic field, the charged impurities quickly move towards the dust collection structure and are firmly adsorbed onto it. Finally, under the influence of gravity or external vibration, they are discharged from the dust outlet into the dust collection chamber, thus effectively removing impurities from the gas. The cleaned gas is then blown out through the exhaust channel, ensuring the cleanliness of the welding environment, preventing damage to the battery from impurities, ensuring battery safety, and improving the dust removal efficiency and effect of the lithium battery tab welding process. This solves the problem of poor dust removal effect in the existing lithium battery tab welding process. Simultaneously, the aforementioned arrangement of the exhaust and intake channels ensures smooth gas flow, preventing gas backflow and eddies. Furthermore, it allows unpurified gas to re-enter the dust removal chamber under gravity for further purification, further improving the dust removal effect of the dust removal device and enhancing battery safety. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0018] Figure 1 A cross-sectional view of an embodiment of the dust removal device according to the present invention is shown;

[0019] Figure 2 A schematic diagram of the structure of a welding device according to an embodiment of the dust removal device of the present invention is shown.

[0020] The above figures include the following reference numerals:

[0021] 1. Parts to be welded; 2. Welding platform;

[0022] 10. Base; 11. Dust collection chamber;

[0023] 20. Housing; 21. Air inlet channel; 22. Air outlet channel; 221. First sub-channel; 222. Second sub-channel;

[0024] 23. Dust discharge port; 231. First dust discharge end face; 232. Second dust discharge end face;

[0025] 24. Dust removal chamber;

[0026] 25. Air inlet; 251. First air inlet face; 252. Second air inlet face;

[0027] 26. Air outlet; 261. First air outlet face; 262. Second air outlet face;

[0028] 27. Mounting plate; 271. Mounting cavity;

[0029] 30. Dust removal components;

[0030] 31. Discharge structure; 311. Filter plate; 312. Discharge component;

[0031] 32. Dust collection structure; 321. Dust collection plate; 322. Discharge section;

[0032] 40. Filter screen. Detailed Implementation

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0035] In this utility model, unless otherwise stated, directional terms such as "upper" and "lower" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" are generally used in relation to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0036] To address the problem of poor dust removal efficiency in the welding process of lithium battery tabs in existing technologies, this application provides a dust removal device and welding equipment incorporating the same.

[0037] like Figure 1 As shown, the dust removal device includes a base 10, a housing 20, and a dust removal assembly 30. The base 10 has a dust collection chamber 11. The housing 20 is mounted on the base 10 and has an air inlet channel 21, an air outlet channel 22, a dust discharge port 23, and a dust removal chamber 24. The air inlet channel 21, the air outlet channel 22, and the dust discharge port 23 are all connected to the dust removal chamber 24. The housing 20 has an air inlet 25 connected to the air inlet channel 21 and an air outlet 26 connected to the air outlet channel 22. The dust discharge port 23 is connected to the dust collection chamber 11. The dust removal assembly 30 is mounted on the housing 20 and located inside the dust removal chamber 24. The dust removal assembly 30 includes a discharge structure 31 and a dust collection structure 32 arranged opposite to each other. The discharge structure 31 is located on the side of the dust collection structure 32 closer to the air inlet channel 21. The discharge structure 31 and the dust collection structure 32 are connected to a power source to present opposite electrodes, thereby forming an electric field between the discharge structure 31 and the dust collection structure 32 for collecting impurities. Among them, the height H1 of the air outlet duct 22 and the height H2 of the air inlet duct 21 satisfy the condition: H2 < H1.

[0038] Using the technical solution of this embodiment, the base 10 of the dust removal device has a dust collection chamber 11. A housing 20 is disposed on the base 10, and the housing 20 has an air inlet channel 21, an air outlet channel 22, a dust discharge port 23, and a dust removal chamber 24. The air inlet channel 21, the air outlet channel 22, and the dust discharge port 23 are all connected to the dust removal chamber 24. The housing 20 is provided with an air inlet 25 connected to the air inlet channel 21 and an air outlet 26 connected to the air outlet channel 22. The dust discharge port 23 is connected to the dust collection chamber 11. A dust removal assembly 30 is disposed on the housing 20 and located within the dust removal chamber 24. The dust removal assembly 30 includes a discharge structure 31 and a dust collection structure 32 disposed opposite to each other. The discharge structure 31 is located on the side of the dust collection structure 32 closer to the air inlet channel 21. The discharge structure 31 and the dust collection structure 32 are connected to a power source to present opposite electrodes, thereby forming an electric field between the discharge structure 31 and the dust collection structure 32 for collecting impurities. The height H1 of the air outlet duct 22 and the height H2 of the air inlet duct 21 satisfy the condition: H2 < H1. Thus, during the welding process of the lithium battery tabs, the above arrangement ensures that the gas generated during welding enters the air inlet duct 21 through the air inlet 25 and smoothly enters the dust removal chamber 24 through the air inlet duct 21. In the dust removal chamber 24, the discharge structure 31 and the dust collection structure 32, which are arranged opposite to each other, form an electrostatic field. When the gas flows through the discharge structure 31, the impurities are given the same charge as the discharge structure 31. Under the strong action of the electrostatic field, the charged impurities quickly move towards the dust collection structure 32 and are firmly adsorbed on the dust collection structure 32. Finally, under the action of gravity or the vibration of external force, they are discharged from the dust outlet 23 into the dust collection chamber 11, thereby achieving effective removal of impurities in the gas. The cleaned gas is then blown out through the air outlet 22, ensuring the cleanliness of the welding environment, avoiding damage to the battery by impurities, ensuring the safety of the battery, improving the dust removal efficiency and effect of the lithium battery tab welding process, and thus solving the problem of poor dust removal effect in the lithium battery tab welding process in the prior art. Meanwhile, the aforementioned arrangement of the air outlet channel 22 and the air inlet channel 21 ensures smooth gas flow and avoids gas backflow and eddy currents. On the other hand, it allows unpurified gas to re-enter the dust removal chamber 24 under the action of gravity for further purification, thereby further improving the dust removal effect of the dust removal device and enhancing battery safety.

[0039] In this embodiment, the ultrasonic welding machine includes an ultrasonic transducer, an amplitude transformer, and a welding head. The ultrasonic welding machine converts electrical energy into high-frequency mechanical vibration through the ultrasonic transducer, and then transmits the vibration to the contact surface of the lithium battery tab through the amplitude transformer and the welding head. Local heat is generated by the friction between the contact surface and the lithium battery tab and the internal friction of the lithium battery tab material, ultimately causing the materials to be welded to fuse. During the vibration, fusion, and high-frequency impact process, some of the metal material will escape, thereby generating metal dust, which in turn forms the impurities mentioned in this application.

[0040] In this embodiment, the air inlet 25 and the air outlet 26 are located on opposite sides of the housing 20.

[0041] In this embodiment, the air inlet channel 21 and the dust removal chamber 24 are connected by welding.

[0042] like Figure 1 As shown, the discharge structure 31 includes a filter plate 311 and a discharge element 312. The filter plate 311 is disposed on the housing 20 and is positioned opposite at least a portion of the air inlet channel 21 to filter impurities entering through the air inlet 25. The discharge element 312 is disposed on the filter plate 311 and located on the side of the filter plate 311 away from the air inlet channel 21. The discharge element 312 is used to release positive or negative charges so that impurities carry positive or negative charges. In this way, the above-mentioned arrangement of the filter plate 311 can perform preliminary filtration of the gas, avoiding direct contact between larger particles of impurities and the discharge element 312, thus preventing damage to the discharge element 312 and protecting it, thereby extending its service life. The above-mentioned arrangement of the discharge element 312 ensures that impurities filtered by the filter plate 311 carry the same charge as the discharge element 312, achieving charged treatment of impurities and ensuring the operational reliability of the dust removal assembly 30. Meanwhile, the plate-shaped filter plate 311 makes the formation of the filter plate 311 simpler and easier to process and realize, reducing the processing difficulty for workers; on the other hand, while supporting the discharge electrode and ensuring the operational reliability of the discharge electrode, it can also increase the contact area between the discharge electrode and impurities, improve the efficiency of impurity filtration, and improve the efficiency of the discharge electrode in charging impurities, further improving the dust removal efficiency of the dust removal component 30.

[0043] In this embodiment, the discharge element 312 releases negative charge.

[0044] In an embodiment not shown in the accompanying drawings, the discharge element releases a positive charge.

[0045] like Figure 1As shown, the dust collection structure 32 includes a dust collection plate 321 and a discharge section 322. The dust collection plate 321 is disposed on the housing 20 and located on the side of the discharge structure 31 away from the air inlet channel 21. The discharge section 322 is disposed on the dust collection plate 321 and is used to discharge the dust collection plate 321, so that the dust collection plate 321 carries a positive or negative charge. At least a portion of the dust collection plate 321 is made of a conductive material. In this way, the above arrangement achieves the charging of the dust collection plate 321 through the discharge section 322, enabling the dust collection plate 321 to adsorb impurities with opposite charges, thereby achieving impurity collection and ensuring gas cleanliness. Simultaneously, the arrangement of the dust collection plate 321 improves its charging efficiency, further enhancing the efficiency of impurity adsorption, and thus improving the dust removal effect of the dust removal assembly 30. Meanwhile, the plate-shaped dust collection plate 321 makes its formation simpler and easier to process and realize, reducing the processing difficulty for workers. On the other hand, it supports the discharge section 322, ensuring the operational reliability of the discharge section 322, while also increasing the contact area between the discharge section 322 and impurities, improving the efficiency of impurity adsorption, and also improving the efficiency of the discharge section 322 in charging the dust collection plate 321, further improving the dust removal efficiency of the dust removal assembly 30.

[0046] In this embodiment, the discharge section 322 releases positive charge.

[0047] In an embodiment not shown in the accompanying drawings, the discharge section releases negative electrode charge.

[0048] In this embodiment, the dust collection plate 321 is made of a conductive material.

[0049] Specifically, the dust collection plate 321 is a metal mesh plate to ensure that the dust collection plate 321 has good conductivity and ventilation, so as to improve the dust collection effect of the dust collection plate 321.

[0050] like Figure 1 As shown, the dust removal device also includes a filter screen 40, which is disposed on the housing 20 and located between the dust removal chamber 24 and the air outlet channel 22. The filter screen 40 filters impurities that have passed through the dust removal assembly 30 before entering the air outlet channel 22. This arrangement ensures that the gas after dust removal by the dust removal assembly 30 is further filtered by the filter screen 40 before being discharged, preventing the discharge of gas that is not completely adsorbed or that carries impurities again for some reason, thus avoiding damage to the battery. This further improves the cleanliness of the discharged gas and enhances the dust removal effect of the dust removal device. Simultaneously, this arrangement also prevents impurities from clogging or disturbing the air outlet channel 22, ensuring the cleanliness of the air outlet channel 22 and extending its service life.

[0051] like Figure 1As shown, the air inlet 25 includes a first air inlet end face 251 and a second air inlet end face 252 spaced apart along the air inlet direction. The diameter D1 of the first air inlet end face 251 and the diameter D2 of the second air inlet end face 252 satisfy the condition: D2 < D1. The air outlet 26 includes a first air outlet end face 261 and a second air outlet end face 262 spaced apart along the opposite direction to the air outlet direction. The diameter D3 of the first air outlet end face 261 and the diameter D4 of the second air outlet end face 262 satisfy the condition: D4 < D3. This arrangement of the air inlet 25 allows gas to be quickly and efficiently drawn into the dust removal chamber 24, improving the efficiency of gas entering the dust removal assembly 30 and also improving the dust removal efficiency of the dust removal device. The arrangement of the air outlet 26 slows down the gas discharge speed, preventing excessively fast gas discharge that could cause dust to be entrained in the discharged gas, thus preventing secondary pollution. This further ensures the cleanliness of the discharged gas, guarantees the cleanliness of the production environment, and improves battery safety.

[0052] like Figure 1 As shown, the housing 20 also includes at least two opposing mounting plates 27. One end of each mounting plate 27 is connected to the inner wall of the housing 20, and the other end is connected to at least a portion of the outer wall of the air outlet duct 22 to support the air outlet duct 22. This arrangement of the mounting plates 27 supports the air outlet duct 22, ensuring its installation stability and reliability, and thus guaranteeing the operational reliability of the dust removal equipment.

[0053] In this embodiment, one end of the mounting plate 27 is connected to the inner wall of the housing 20 by welding, and the other end of the mounting plate 27 is connected to the outer wall of the air outlet duct 22 by screws.

[0054] In this embodiment, two mounting plates 27 are provided.

[0055] It should be noted that the number of installation settings is not limited to this and can be adjusted according to working conditions and usage requirements. Optionally, the number of installation plates 27 can be three, four, six, seven, eight, or more.

[0056] In this embodiment, both the air inlet channel 21 and the air outlet channel 22 are cylindrical, and the mounting plate 27 has an arc-shaped surface at one end near the air outlet channel 22 to ensure that it matches the outer wall of the air outlet channel 22.

[0057] like Figure 1As shown, the mounting plate 27 and at least part of the inner wall of the housing 20 form a mounting cavity 271. At least part of the air outlet channel 22 is located within the mounting cavity 271. The air outlet channel 22 includes a first sub-channel 221 and a second sub-channel 222 that are interconnected. The first sub-channel 221 and the second sub-channel 222 are set at an angle, and the end of the first sub-channel 221 away from the second sub-channel 222 is connected to the dust collection chamber 24. In this way, the above arrangement achieves the connection between the air outlet channel 22 and the dust collection chamber 24 through the first sub-channel 221. On the other hand, the angle between the first sub-channel 221 and the second sub-channel 222 further slows down the gas discharge speed, allowing impurities to continue to fall back into the dust collection chamber 24 under the action of gravity for collection again, thus further ensuring the cleanliness of the discharged gas and the cleanliness of the working environment.

[0058] In this embodiment, the angle between the first sub-channel 221 and the second sub-channel 222 is set to 90°.

[0059] It should be noted that the angle between the first sub-channel 221 and the second sub-channel 222 is not limited to this value and can be adjusted according to the working conditions and usage requirements. Optionally, the angle between the first sub-channel 221 and the second sub-channel 222 can be 60°, 70°, 100°, or 135°.

[0060] like Figure 1 As shown, the dust discharge port 23 includes a first dust discharge end face 231 and a second dust discharge end face 232 spaced apart along the exhaust direction. The width W1 of the first dust discharge end face 231 and the width W2 of the second dust discharge end face 232 satisfy the condition: W1 < W2. This arrangement slows down the discharge speed of impurities, preventing them from flying due to excessive discharge speed, and avoiding the risk of explosion caused by the accumulation and flying of impurities, thus ensuring the safety of the working environment.

[0061] Specifically, the dust discharge port 23 is equipped with an adsorption element to adsorb impurities that fall into the dust removal chamber 24. In this way, the above-mentioned arrangement further adsorbs impurities, thereby further improving the dust removal effect of the dust removal device.

[0062] In this embodiment, the adsorbent is activated carbon.

[0063] like Figure 2 As shown, this embodiment also provides a welding device, which includes a welding platform 2 and a dust removal device. The welding platform 2 is used to weld the workpiece 1 to be welded. The dust removal device is located on one side of the welding platform 2 to remove dust from impurities generated during the welding process. The dust removal device is the dust removal device described above.

[0064] In this embodiment, the component to be welded 1 is a tab.

[0065] In this embodiment, the welding platform 2 is an ultrasonic welding machine.

[0066] Alternatively, the ultrasonic welding machine is an MSK-UW-D800W ultrasonic electrode welding machine.

[0067] In this embodiment, the welding equipment also includes an air suction device, which is installed on the dust removal device. The air suction device uses negative pressure to draw the metal dust generated by the high-frequency impact during the welding process of the MSK-UW-D800W ultrasonic electrode welding machine into the air inlet 25 of the dust removal device, thereby improving the dust removal efficiency of the dust removal device.

[0068] Optionally, the inhalation device includes Smea's YX100.

[0069] Optionally, the suction device includes other devices known to those skilled in the art for venting or generating negative pressure.

[0070] Specifically, the air intake device also includes an exhaust fan or smoke extractor connected to the air outlet 26.

[0071] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0072] The dust removal device has a dust collection chamber on its base. A housing is mounted on the base and includes an air inlet channel, an air outlet channel, a dust discharge port, and the dust collection chamber. All three channels are connected to the dust collection chamber. The housing has an air inlet connected to the air inlet channel and an air outlet connected to the air outlet channel. The dust discharge port is connected to the dust collection chamber. A dust removal assembly is mounted on the housing and located within the dust collection chamber. The assembly includes a discharge structure and a dust collection structure arranged opposite each other. The discharge structure is located on the side of the dust collection structure closest to the air inlet channel. Both the discharge and dust collection structures are connected to a power source and present opposite electrodes to create an electric field between them for collecting impurities. The height H1 of the air outlet channel and the height H2 of the air inlet channel satisfy the condition: H2 < H1. This arrangement ensures that during the welding of the lithium battery tabs, the welding gas enters the air inlet channel through the air inlet and smoothly flows into the dust collection chamber. In the dust removal chamber, the opposing discharge and dust collection structures form an electrostatic field. When gas flows through the discharge structure, impurities are given the same charge as the discharge structure. Under the strong influence of the electrostatic field, the charged impurities quickly move towards the dust collection structure and are firmly adsorbed onto it. Finally, under the influence of gravity or external vibration, they are discharged from the dust outlet into the dust collection chamber, thus effectively removing impurities from the gas. The cleaned gas is then blown out through the exhaust channel, ensuring the cleanliness of the welding environment, preventing damage to the battery from impurities, ensuring battery safety, and improving the dust removal efficiency and effect of the lithium battery tab welding process. This solves the problem of poor dust removal effect in the existing lithium battery tab welding process. Simultaneously, the aforementioned arrangement of the exhaust and intake channels ensures smooth gas flow, preventing gas backflow and eddies. Furthermore, it allows unpurified gas to re-enter the dust removal chamber under gravity for further purification, further improving the dust removal effect of the dust removal device and enhancing battery safety.

[0073] Obviously, the embodiments described above 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 should fall within the protection scope of this utility model.

[0074] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0075] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0076] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A dust removal device, characterized in that, include: The base (10) has a dust collection chamber (11); A housing (20) is disposed on the base (10). The housing (20) has an air inlet channel (21), an air outlet channel (22), a dust discharge port (23), and a dust removal chamber (24). The air inlet channel (21), the air outlet channel (22), and the dust discharge port (23) are all connected to the dust removal chamber (24). The housing (20) is provided with an air inlet (25) connected to the air inlet channel (21) and an air outlet (26) connected to the air outlet channel (22). The dust discharge port (23) is connected to the dust collection chamber (11). A dust removal assembly (30) is disposed on the housing (20) and located in the dust removal chamber (24). The dust removal assembly (30) includes a discharge structure (31) and a dust collection structure (32) disposed opposite to each other. The discharge structure (31) is located on the side of the dust collection structure (32) near the air inlet channel (21). The discharge structure (31) and the dust collection structure (32) are connected to a power source to present opposite electrodes so as to form an electric field for collecting impurities between the discharge structure (31) and the dust collection structure (32). The height H1 of the air outlet channel (22) and the height H2 of the air inlet channel (21) satisfy the condition: H2 < H1.

2. The dust removal device according to claim 1, characterized in that, The discharge structure (31) includes: A filter plate (311) is disposed on the housing (20) and is disposed opposite to at least a portion of the air inlet channel (21) to filter the impurities entering through the air inlet (25); A discharge element (312) is disposed on the filter plate (311) and located on the side of the filter plate (311) away from the air inlet channel (21). The discharge element (312) is used to release positive or negative charges so that the impurities carry positive or negative charges.

3. The dust removal device according to claim 1, characterized in that, The dust collection structure (32) includes: A dust collection plate (321) is disposed on the housing (20) and located on the side of the discharge structure (31) away from the air inlet channel (21); A discharge section (322) is disposed on the dust collection plate (321). The discharge section (322) is used to discharge the dust collection plate (321) so that the dust collection plate (321) carries positive or negative charge. At least a portion of the dust collection plate (321) is made of a conductive material.

4. The dust removal device according to claim 1, characterized in that, The dust removal device also includes a filter screen (40), which is disposed on the housing (20) and located between the dust removal chamber (24) and the air outlet channel (22) so that the impurities after being removed by the dust removal component (30) are filtered by the filter screen (40) and then enter the air outlet channel (22).

5. The dust removal device according to claim 1, characterized in that, The air inlet (25) includes a first air inlet end face (251) and a second air inlet end face (252) spaced apart along the air inlet direction. The diameter D1 of the first air inlet end face (251) and the diameter D2 of the second air inlet end face (252) satisfy the following condition: D2 < D1. The air outlet (26) includes a first air outlet end face (261) and a second air outlet end face (262) spaced apart in the opposite direction to the air outlet direction. The diameter D3 of the first air outlet end face (261) and the diameter D4 of the second air outlet end face (262) satisfy the following condition: D4 < D3.

6. The dust removal device according to any one of claims 1 to 5, characterized in that, The housing (20) also includes at least two oppositely arranged mounting plates (27), one end of which is connected to the inner wall of the housing (20), and the other end of which is connected to at least part of the outer wall of the air outlet channel (22) to support the air outlet channel (22).

7. The dust removal device according to claim 6, characterized in that, The mounting plate (27) and at least a portion of the inner wall of the housing (20) surround to form a mounting cavity (271), and at least a portion of the air outlet channel (22) is located within the mounting cavity (271). The air outlet channel (22) includes a first sub-channel (221) and a second sub-channel (222) that are interconnected. The first sub-channel (221) and the second sub-channel (222) are arranged at an angle. The end of the first sub-channel (221) away from the second sub-channel (222) is connected to the dust removal chamber (24).

8. The dust removal device according to claim 1, characterized in that, The dust discharge port (23) includes a first dust discharge end face (231) and a second dust discharge end face (232) spaced apart along the exhaust direction. The width W1 of the first dust discharge end face (231) and the width W2 of the second dust discharge end face (232) satisfy the following condition: W1 < W2.

9. The dust removal device according to claim 1, characterized in that, The dust discharge port (23) is equipped with an adsorption element to adsorb impurities that fall into the dust removal chamber (24).

10. A welding device, characterized in that, The welding equipment includes a welding platform (2) and a dust removal device. The welding platform (2) is used to weld the workpiece (1) to be welded. The dust removal device is located on one side of the welding platform (2) to remove dust from impurities generated during the welding process. The dust removal device is the dust removal device according to any one of claims 1 to 9.

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