Non-contact dust removal device

Abstract

The utility model discloses a kind of non-contact dust removal devices, belong to lithium battery production equipment technical field, to solve the problem of existing technology's pole piece dust removal, including: dust removal cover, blowing assembly, negative pressure component and guide component;The hollow structure inside dust removal cover, and two ends are respectively provided with the first opening and the second opening with outside communication;Blowing assembly is set in dust removal cover, including the blowing plate of being installed at the first opening, the air cavity of being set at the one side of blowing plate and the air inlet pipe connected with air cavity;Negative pressure component is set in dust removal cover and is close to blowing assembly, including the dust collection cover of being installed at the second opening and the dust removal pipe connected in the outer end of dust collection cover;Guide component is installed at the first opening of dust removal cover and contact with pole piece, for guiding and flattening pole piece. The utility model can uniformly blow to pole piece, effectively clean dust on pole piece while avoiding pole piece deformation.

Description

Technical Field

[0001] This utility model relates to a non-contact dust removal device, belonging to the technical field of lithium battery production equipment. Background Technology

[0002] With the development of battery technology, the safety performance requirements for batteries are becoming increasingly stringent, as are the control capabilities required for the manufacturing process, especially dust control, which directly affects the battery's short-circuit rate. Traditional dust removal methods include FFU (Fan Filter Unit), brush dust removal, and air knife dust removal. FFU involves whole-machine dust removal; brush dust removal can damage the electrode sheets and cause secondary pollution; air knife dust removal uses a direct-blowing method, which has specific positioning requirements. Non-contact dust removal devices are widely accepted due to their excellent dust removal effect, convenient application, simple structure, and lack of special requirements for the usage environment.

[0003] Existing non-contact dust removal devices, such as the negative pressure dust removal technology disclosed in patent CN222625627U, have low efficiency, especially when the negative pressure is too high, which can cause the electrode sheets to be sucked up, resulting in electrode sheet shaking and deformation. Considering the impact of negative pressure dust removal, existing technologies also use cyclone nozzles to remove dust from the electrode sheet surface, such as the non-contact dust removal device disclosed in patent CN215940887U. In long-term use, although cyclone dust removal can remove static electricity from the electrode sheet surface to a certain extent and make the dust fly up, due to the influence of the rotating airflow, some dust will follow the airflow back to the electrode sheet, forming secondary pollution. At the same time, the impact force of the cyclone nozzle on the electrode sheet surface is uneven, which can easily lead to electrode sheet deformation and tension fluctuation, affecting subsequent winding and other processes. Utility Model Content

[0004] Purpose of the utility model: The purpose of this utility model is to overcome the shortcomings of the prior art and provide a non-contact dust removal device. By combining the dust removal cover and the air blowing component, the device can blow air evenly on the electrode sheet to effectively clean the dust on the electrode sheet. At the same time, the negative pressure component collects the dust falling on the electrode sheet laterally, avoiding the negative pressure approaching the electrode sheet and directly acting on the electrode sheet to avoid deformation of the electrode sheet and avoid secondary contamination of the electrode sheet by dust.

[0005] To solve the above-mentioned technical problems, this utility model is implemented using the following technical solution: A non-contact dust removal device, comprising: The dust removal cover has a hollow structure inside, and has a first opening and a second opening at both ends that communicate with the outside. The air blowing assembly is installed inside the dust collector hood and includes an air blowing plate installed at the first opening, an air chamber located on one side of the air blowing plate, and an air inlet pipe connected to the air chamber. The negative pressure component, located inside the dust collection hood and close to the air blowing component, includes a dust collection hood installed at the second opening and a dust collection pipe connected to the outer end of the dust collection hood; The guide assembly, installed at the first opening of the dust collector cover and in contact with the electrode, is used to guide and level the electrode.

[0006] In this solution, the air blowing component evenly blows air onto the electrode to effectively clean the dust on the electrode. At the same time, the negative pressure component collects the dust that falls onto the electrode laterally, preventing the negative pressure from approaching or directly affecting the electrode and causing deformation. The dust collector covers collect the dust adsorbed by the negative pressure component, preventing dust leakage and secondary pollution to the electrode. Finally, the guide component isolates the dust collector covers from the electrode, preventing damage to the electrode during the dust removal process.

[0007] Optionally, the air blowing plate has multiple air holes, and the multiple air holes are evenly arranged along the air blowing plate.

[0008] In this solution, when the gas is ejected from the blowing plate, a uniform and stable airflow field is formed in the target area, which effectively meets the requirements for airflow uniformity and avoids deformation or wrinkling of the electrode sheet caused by excessive airflow or uneven airflow, thereby improving the overall performance and quality of the product.

[0009] Optionally, the end of the air inlet pipe away from the air outlet is connected to the air delivery device via a solenoid valve.

[0010] In this solution, an air supply device is used to provide airflow to the air blowing assembly, and the air blowing flow rate is controlled by the air supply device to meet the cleaning needs of different types of electrode sheets and different working conditions.

[0011] Optionally, the end of the dust removal pipe furthest from the dust collection hood is connected to a negative pressure fan or a central dust removal mechanism in the workshop.

[0012] In this solution, when the dust collection pipe is connected to the negative pressure fan, the fan creates a negative pressure environment within the pipe upon startup. This negative pressure causes airflow at the dust collection hood, drawing dust into it and continuously transporting it to the designated processing location via the dust collection pipe. When the dust collection pipe is connected to the central dust collection system in the workshop, the system can centrally process the dust transported from each dust collection hood through the dust collection pipe, effectively separating the dust from the air, preventing secondary dust contamination of the electrode sheets, and improving the workshop working environment.

[0013] Optionally, the guide assembly includes two sets of roller mounting plates symmetrically mounted on the dust collector cover, rollers respectively connected to the two sets of roller mounting plates, and an electrode guide plate mounted on one side of the dust collector cover. The electrode guide plate is adapted to the electrode.

[0014] In this solution, the rolling contact between the roller and the electrode sheet avoids static electricity and mechanical damage to the electrode sheet caused by friction, achieving non-destructive dust removal. During the transmission of the tabs with the electrode sheet, the tabs may bend or wrinkle due to various reasons. The tab guide plate flattens the passing tabs. Under the action of the tab guide plate, the tabs are subjected to a certain pressure and guiding force, which gradually restores the bent tabs to flatness, ensuring that the shape and size of the tabs meet the design requirements and providing good conditions for subsequent battery assembly processes.

[0015] Optionally, the roller is arranged along the electrode belt traveling direction, and the surface of the roller protrudes from the surface of the first opening, such that the distance between the surface of the roller and the electrode is less than the distance between the first opening and the electrode.

[0016] In this solution, when the roller makes rolling contact with the electrode sheet, the roller protrudes from the surface of the first opening, so that the surface of the first opening of the dust collector cover does not contact the passing electrode sheet, thus achieving non-destructive cleaning and dust removal.

[0017] Optionally, the electrode guide plate is connected to the dust collector cover via connecting ears, and the electrode guide plate is a combination of an arc-shaped plate and a flat plate, with the two ends near the roller being arc-shaped and the middle part being flat.

[0018] In this design, the electrode tabs often exhibit irregular shapes due to the mechanical forces applied during winding and cutting processes. When the tabs pass through curved areas, they can be gradually corrected following their natural curvature, avoiding damage caused by forced compression. When the tabs pass through flat areas, the flat plate can apply uniform pressure, effectively leveling the center of the tab in the horizontal direction.

[0019] Optionally, the dust collection hood is conical, with the smaller end of the dust collection hood close to the second opening for connecting the dust removal pipe, and the larger end snapped into the inner surface of the dust removal outer cover.

[0020] This solution fully considers the principles of airflow dynamics. When the dust-laden airflow enters the dust collector hood from the first opening, the airflow will diffuse in all directions. The conical design guides the dust-laden airflow, causing it to gradually narrow its cross-section as it approaches the second opening. This increases the airflow speed and makes it easier to carry dust particles to the dust collector pipe, thereby improving dust removal efficiency.

[0021] Optionally, the number of dust collection hoods is one or more, and the dust collection hoods are symmetrically arranged along the air blowing assembly and respectively snapped onto the inner surface of the dust removal hood and the outer surface of the air chamber.

[0022] This solution uses more than one dust collection hood, symmetrically distributed along the air blowing assembly, which significantly expands the dust collection range. Compared to a single dust collection hood, it is better able to resist airflow disturbances and is not affected by the air blowing assembly.

[0023] Optionally, the device may be mounted close to one or both sides of the electrode via a bracket.

[0024] This non-contact dust removal solution can be used on one side or both sides simultaneously, thereby improving dust removal efficiency.

[0025] Beneficial effects: Compared with the prior art, this utility model has the following advantages: During electrode conveying, the dust collector cover is close to the electrode without contacting it, which avoids damage to the electrode surface. The combination of the dust collector cover and the air blowing component can blow air evenly onto the electrode to effectively clean the dust on the electrode. At the same time, the negative pressure component collects the dust that falls on the electrode laterally, preventing the negative pressure from approaching or directly acting on the electrode and causing electrode deformation.

[0026] By using the protruding roller and the dust collector cover, the dust collector cover is brought close to the electrode without contacting it. At the same time, the rolling of the roller reduces the physical friction of the electrode during belt travel, thus avoiding damage to the electrode.

[0027] The device can be installed on the electrode sheet and can be used along one side of the electrode sheet or to clean both sides of the electrode sheet at the same time, avoiding secondary pollution to the other side during the dust cleaning process. Attached Figure Description

[0028] Figure 1 The diagram shown is a structural diagram of the non-contact dust removal device of this utility model. Figure 2 The image shown is a front view of the non-contact dust removal device of this utility model; Figure 3 The image shown is a left view of the non-contact dust removal device of this utility model; Figure 4 The image shown is a top view of the non-contact dust removal device of this utility model. Figure 5 The figure shown is an embodiment of the non-contact dust removal device of this utility model; Figure 6 The figure shown is a perspective view of Embodiment 2 of the non-contact dust removal device of this utility model; Figure 7 The image shown is a side view of Embodiment 2 of the non-contact dust removal device of this utility model.

[0029] In the diagram: 1. Air blowing assembly, 10. Air blowing plate, 11. Air hole, 3. Dust removal cover, 4. Dust removal pipe, 5. Roller mounting plate, 6. Roller, 7. Air inlet pipe, 8. Electrode guide plate, 9. Dust collection cover, 2. Electrode sheet, 20. Electrode ear. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention. Example

[0031] This embodiment provides a non-contact dust removal device, including: a dust removal hood 3, an air blowing assembly 1, a negative pressure assembly, and a guide assembly; as shown Figure 1 The dust collector cover 3 shown has a hollow structure inside, with a first opening and a second opening at both ends communicating with the outside. The air blowing assembly 1 is installed inside the dust collector cover and includes an air blowing plate 10 and an air inlet pipe 7. The air blowing plate 10 is installed at the first opening, and the air inlet pipe 7 is located near the air chamber ear on one side of the air blowing plate 10 and connected to the air chamber. The negative pressure assembly is installed inside the dust collector cover and near the air blowing assembly 1, and includes a dust collection cover 9 and a dust collection pipe 4. The dust collection cover 9 is installed at the second opening, and the dust collection pipe 4 is connected to the outer end of the dust collection cover 9. The guide assembly is installed at the first opening of the dust collector cover 3 and contacts the electrode 2, and is used to guide and level the electrode 2. In this embodiment, the air blowing component 1 blows air evenly onto the electrode 2, effectively cleaning the dust on the electrode 2. At the same time, the negative pressure component collects the dust that falls onto the electrode 2 laterally, preventing the negative pressure from approaching the electrode 2 and directly affecting the electrode 2, which could cause deformation of the electrode 2. The dust collection cover 3 collects the dust adsorbed by the negative pressure component, preventing dust leakage and secondary pollution to the electrode 2. Finally, the guide component isolates the dust collection cover 3 from the electrode 2, preventing damage to the electrode 2 during the dust removal process.

[0032] Optional, such as Figure 2 The blowing plate 10 shown has multiple air holes 11, which are evenly arranged along the blowing plate 10. In this embodiment, when the gas is ejected from the blowing plate 10, a uniform and stable airflow field is formed in the target area, which effectively meets the requirements for airflow uniformity, avoids deformation or wrinkling of the electrode 2 caused by excessive airflow or uneven airflow, and improves the overall performance and quality of the product.

[0033] Optionally, the end of the air inlet pipe 7 furthest from the air outlet is connected to the air delivery device via a solenoid valve. This embodiment, for example... Figure 3 The air inlet pipe 7 extends out to the dust removal cover 3 and connects to the air supply device. The air supply device provides airflow to the air blowing assembly 1 and controls the air blowing flow rate to meet the cleaning needs of the electrode 2 under different models and working conditions.

[0034] Optionally, the end of the dust collection pipe 4 furthest from the dust collection hood 9 is connected to a negative pressure fan. In this embodiment, when the dust collection pipe 4 is connected to the negative pressure fan, a negative pressure environment is created inside the dust collection pipe 4 after the negative pressure fan is started. This negative pressure causes airflow at the dust collection hood 9, drawing dust into the dust collection hood 9 and continuously transporting it to the designated processing location through the dust collection pipe 4, thus preventing secondary dust contamination of the electrode sheet 2.

[0035] Optional, such as Figure 4 and Figure 5 The guide assembly shown includes: two sets of roller mounting plates 5, rollers 6, and tab guide plates 8; wherein, the two sets of roller mounting plates 5 are symmetrically mounted on the dust collector cover 3, the rollers 6 are respectively connected to the two sets of roller mounting plates 5, and the tab guide plates 8 are mounted on one side of the dust collector cover 3; the rollers 6 and the tab guide plates 8 are perpendicular to each other, and the tab guide plates 8 are adapted to the tabs 20.

[0036] In this embodiment, the two rollers 6 correspond to the direction of movement of the electrode sheet 2. The two rollers 6 support the dust removal cover 3 horizontally close to the electrode sheet 2 and continuously remove dust from the electrode sheet 2 as it passes by. At the same time, the rollers 6 and the electrode sheet 2 make rolling contact to avoid static electricity and mechanical damage to the electrode sheet 2 caused by friction, thus achieving non-destructive dust removal. During the transmission of the tab 20 with the electrode sheet 2, the tab 20 may be bent or wrinkled for various reasons. The tab guide plate 8 flattens the tab 20 as it passes by. Under the action of the tab guide plate 8, the tab 20 is subjected to a certain pressure and guiding force, which gradually restores the bent tab 20 to a flat state, ensuring that the shape and size of the tab 20 meet the design requirements and providing good conditions for the subsequent battery assembly process.

[0037] Optionally, the roller 6 is arranged along the belt-carrying direction of the electrode 2, and the surface of the roller 6 protrudes from the surface of the first opening, so that the distance between the surface of the roller 6 and the electrode 2 is less than the distance between the first opening and the electrode 2. In this embodiment, when the roller 6 and the electrode 2 make rolling contact, since the roller 6 protrudes from the surface of the first opening, the first opening surface of the dust removal cover 3 does not contact the passing electrode 2, thus achieving non-destructive cleaning and dust removal.

[0038] Optional, such as Figure 4 and Figure 5 The electrode guide plate 8 shown is connected to the dust collector cover 3 via connecting ears. The electrode guide plate 8 is a combination of an arc-shaped plate and a flat plate, with arc-shaped ends near the roller 6 and a flat plate in the middle. In this embodiment, due to the mechanical forces exerted on the electrode sheet 2 during winding and cutting processes, the electrode ear 20 often exhibits an irregular shape. When the electrode ear 20 passes through the arc-shaped area, it can be gradually corrected along its natural bending trend, avoiding damage to the electrode ear 20 caused by forced compression. When the electrode ear 20 passes through the flat plate area, the flat plate can apply uniform pressure, effectively flattening the middle of the electrode ear 20 in the horizontal direction.

[0039] Optional, such as Figure 4The dust collection hood 9 shown is conical. The smaller end of the dust collection hood 9 is close to the second opening and is used to connect the dust collection pipe 4, while the larger end is snapped into the inner surface of the dust collection outer cover 3. This embodiment fully considers the principles of airflow dynamics. When the dust-laden airflow enters the interior of the dust collection outer cover 3 from the first opening, the airflow will diffuse in all directions. The conical design guides the dust-laden airflow, causing it to gradually narrow its cross-section as it approaches the second opening, increasing the airflow velocity and making it more conducive to carrying dust particles to the dust collection pipe 4, thereby improving dust collection efficiency.

[0040] Optional, such as Figure 3 The illustrated dust collection hood 9 consists of two symmetrically arranged along the air blowing assembly 1, and is respectively engaged with the inner surface of the dust removal outer cover 3 and the outer surface of the air chamber. This embodiment uses two dust collection hoods 9, symmetrically distributed along the air blowing assembly 1, which significantly expands the dust collection range. Compared to a single dust collection hood 9, it is better able to resist airflow disturbances and is not affected by the positive pressure airflow of the air blowing assembly 1.

[0041] Optionally, the device can be positioned close to both sides of electrode 2 via a bracket. This solution allows for simultaneous non-contact dust removal from both sides, improving dust removal efficiency.

[0042] Working principle: Two non-contact dust removal devices are installed opposite each other via a bracket, and conveyor rollers are installed on both sides of the bracket; The electrode roll 2 is placed on one of the conveying rollers, so that the rotation of the conveying roller drives the electrode roll 2 to unfold and convey the electrode 2 to the other conveying roller. During the conveying process, the electrode 2 passes through two non-contact dust removal devices, which are located on both sides of the electrode 2. The negative pressure fan and air supply device are started. The high-pressure airflow output by the air supply device enters the air chamber through the air inlet pipe 7. When the high-pressure gas is sprayed out from the air blowing plate 10, a uniform and stable airflow field is formed in the target area. The effective electrode 2 is blown evenly on both sides, causing the dust to be lifted from the surface of the electrode 2. At the same time, the negative pressure airflow acts on both sides of the air blowing assembly 1 through the dust removal pipe 4 and the dust collection hood 9, guiding the lifted dust with negative pressure. After entering the dust collection hood 9, it is collected uniformly through the dust removal pipe 4. During the movement of electrode 2, the roller 6 makes rolling contact with electrode 2, so that the dust removal cover 3 makes contact with electrode 2 without damage. The electrode ear 20 is leveled by the electrode ear guide plate 8, which can restore the wrinkled and bent electrode ear 20 to straight during the dust removal process, so as to meet the requirements of subsequent processing.

[0043] When using non-contact dust removal devices on both sides, they can be installed either staggered or aligned. Practical results have shown that aligned installation provides the best dust removal and leveling effect. Example

[0044] This embodiment provides a non-contact dust removal device, including: a dust collection hood, an air blowing assembly, a negative pressure assembly, and a guide assembly, sharing the same technical concept and working principle as Embodiment 1. This embodiment features one or more dust collection hoods symmetrically distributed along the air blowing assembly, significantly expanding the dust collection range. Compared to a single dust collection hood, it better resists airflow disturbances and is unaffected by the air blowing assembly.

[0045] Optionally, the end of the dust removal pipe furthest from the dust collection hood is connected to the central dust removal mechanism in the workshop. When the dust removal pipe is connected to the central dust removal mechanism, the central dust removal mechanism can centrally process the dust transported from each dust collection hood through the dust removal pipe, effectively separating the dust from the air, avoiding secondary dust pollution of the electrode sheets, and improving the workshop working environment.

[0046] In summary, when the electrode is being transported, the dust removal cover is close to the electrode without contacting it, thus avoiding damage to the electrode surface. The combination of the dust removal cover and the air blowing component allows for uniform air blowing onto the electrode, effectively cleaning the dust on the electrode. At the same time, the negative pressure component collects the dust falling onto the electrode laterally, preventing the negative pressure from approaching or directly acting on the electrode and causing deformation.

[0047] By using the protruding roller and the dust collector cover, the dust collector cover is brought close to the electrode without contacting it. At the same time, the rolling of the roller reduces the physical friction of the electrode during belt travel, thus avoiding damage to the electrode.

[0048] The device can be installed on the electrode sheet and can be used along one side of the electrode sheet or to clean both sides of the electrode sheet at the same time, avoiding secondary pollution to the other side during the dust cleaning process.

[0049] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0050] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A non-contact dust removal device, characterized in that, include: The dust removal cover has a hollow structure inside, and has a first opening and a second opening at both ends that communicate with the outside. The air blowing assembly is installed inside the dust collector hood and includes an air blowing plate installed at the first opening, an air chamber located on one side of the air blowing plate, and an air inlet pipe connected to the air chamber. The negative pressure component, located inside the dust collection hood and close to the air blowing component, includes a dust collection hood installed at the second opening and a dust collection pipe connected to the outer end of the dust collection hood; The guide assembly, installed at the first opening of the dust collector cover and in contact with the electrode, is used to guide and level the electrode.

2. The non-contact dust removal device according to claim 1, characterized in that, The air blowing plate has multiple air holes, which are evenly arranged along the air blowing plate.

3. The non-contact dust removal device according to claim 1, characterized in that, The end of the air inlet pipe furthest from the air outlet is connected to the air delivery device via a solenoid valve.

4. The non-contact dust removal device according to claim 1, characterized in that, The end of the dust removal pipe furthest from the dust collection hood is connected to a negative pressure fan or a central dust removal mechanism in the workshop.

5. A non-contact dust removal device according to claim 1, characterized in that, The guiding assembly includes two sets of roller mounting plates symmetrically mounted on the dust collector cover, rollers respectively connected to the two sets of roller mounting plates, and an electrode guide plate mounted on one side of the dust collector cover. The electrode guide plate is adapted to the electrode.

6. A non-contact dust removal device according to claim 5, characterized in that, The roller is arranged along the electrode belt traveling direction, and the surface of the roller protrudes from the surface of the first opening, so that the distance between the surface of the roller and the electrode is less than the distance between the first opening and the electrode.

7. The non-contact dust removal device according to claim 1, characterized in that, The electrode guide plate is connected to the dust collector cover via connecting ears, and the electrode guide plate is a combination of an arc-shaped plate and a flat plate, with the two ends near the roller being arc-shaped and the middle part being flat.

8. A non-contact dust removal device according to claim 1, characterized in that, The dust collection hood is conical, with the end of the dust collection hood with the smallest diameter close to the second opening, and the other end snapped into the inner surface of the dust removal hood.

9. A non-contact dust removal device according to claim 1, characterized in that, The number of dust collection hoods is one or more, and the dust collection hoods are symmetrically arranged along the air blowing assembly and respectively snapped onto the inner surface of the dust removal hood and the outer surface of the air chamber.

10. A non-contact dust removal device according to claim 1, characterized in that, It also includes arranging the device close to one or both sides of the electrode via a bracket.

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