Battery pole piece slitting and dedusting device

Abstract

This invention belongs to the field of battery manufacturing technology and discloses a battery electrode separation and dust removal device. It includes a frame on which a take-up roller and a dust removal roller are rotatably mounted. At least one of the take-up roller and the dust removal roller is mounted on the frame via a linear guide mechanism to achieve dynamic adjustment of the distance between them. The axis of the dust removal roller is parallel to the axis of the take-up roller and they are arranged adjacent to each other. Before entering the winding process, the strip first wraps around the surface of the dust removal roller, while the outer layer of the already wound strip remains in contact with the dust removal roller. This invention cleverly utilizes the inner and outer surfaces formed by the wound strip during the winding process, setting corresponding dust removal paths for each: when the electrode enters the take-up roller, its uncovered inner surface is first wiped or adsorbed by a pre-dust removal unit; as the roll diameter gradually increases, the outer surface of the wound portion continues to contact the rotating dust removal roller, receiving reverse dynamic wiping or negative pressure adsorption.

Description

Technical Field

[0001] This invention belongs to the field of battery production technology, specifically relating to a battery electrode separation and dust removal device. Background Technology

[0002] Because processes such as cutting, rolling, and handling generate dust, metal shavings, fibrous impurities, and electrostatically adsorbed particles on both sides of the electrode, existing solutions typically configure a complete dust removal unit above and below the electrode transport path. While this "dual-sided independent cleaning" architecture can achieve basic surface cleanliness requirements under ideal conditions, it suffers from significant technical and economic drawbacks: First, the upper and lower dust removal units each require independent air supply pipelines, high-frequency generators (such as ultrasonic drive power supplies), nozzle or transducer arrays, precision mounting brackets, and independent control modules. This not only leads to complex equipment structures and high procurement costs but also significantly increases the difficulty of later maintenance and energy consumption. At the same time, the redundant layout on both sides causes a significant increase in the overall size of the machine, resulting in unnecessary space occupation in the space-sensitive lithium battery drying room, which restricts the compactness and flexible layout of the production line.

[0003] Secondly, even if the electrode reaches an ideal cleanliness level at the dust removal station exit, there is usually still a 0.5–2 meter unprotected free transmission section between that location and the winding roller inlet. Within this section, the electrode is completely exposed to the drying room environment and is highly susceptible to re-adsorption of suspended particles due to airflow disturbances, equipment vibrations, or residual static electricity. This can lead to partial failure of the previous dust removal effect and may even carry contaminants into the winding core, creating potential micro-short circuits or lithium plating hazards. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a battery electrode separation and dust removal device to solve the problems existing in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is a battery electrode sheet separation and dust removal device, including a frame, on which a take-up roller and a dust removal roller are rotatably mounted. At least one of the take-up roller and the dust removal roller is mounted on the frame via a linear guide mechanism to achieve dynamic adjustment of the distance between them. The axis of the dust removal roller is parallel to the axis of the take-up roller and the two are arranged adjacent to each other. Before entering the winding, the material strip first wraps around the surface of the dust removal roller, while the outer layer of the already wound material strip continues to maintain contact with the dust removal roller. During the material strip winding... During the process, the side facing the take-up roller is defined as the inner side, and the side facing away from the take-up roller is defined as the outer side. Both the take-up roller and the dust removal roller are located on the inner side of the strip. Before the inner side of the strip is attached to the take-up roller to complete the winding, it is first treated by the dust removal roller for dust removal. During the subsequent winding process, the outer side of the wound strip will come into contact with the dust removal roller, thereby performing dust removal on the outer side of the strip after winding is completed. This allows the dust removal operation to be completed on the inner and outer surfaces of the strip at different times using a single dust removal roller.

[0006] Preferably, the rotation direction of the take-up roller is the same as that of the dust removal roller; during the winding process of the strip, when the inner side of the strip passes through the dust removal roller for dust removal, the running direction of the strip is consistent with the rotation direction of the dust removal roller, forming a forward contact; in the subsequent winding stage, when the outer side of the wound strip contacts the dust removal roller and receives dust removal, the rotation direction of the outer side of the strip is opposite to the running direction of the dust removal roller, forming a reverse contact.

[0007] Preferably, the frame is also provided with a limiting roller, which is matched with the dust removal roller and the relative position between the two is fixed. The limiting roller and the dust removal roller are respectively located on both sides of the material belt, and under the pressing action of the limiting roller, the material belt is always in close contact with the surface of the dust removal roller during operation, thereby ensuring that the contact position between the dust removal roller and the material belt remains constant.

[0008] Preferably, the frame is also provided with guide rollers; during the material strip winding process, the inner side of the material strip passes through the dust removal roller and the guide roller in sequence before entering the take-up roller after it is attached to the take-up roller to complete the winding.

[0009] Preferably, the guiding direction of the linear guiding mechanism is arranged perpendicular to the axis of the take-up roller; the linear guiding mechanism includes any one of the following: a slide rail and slider assembly, a linear guide post and linear bearing combination, or a displacement adjustment unit driven by a pneumatic / electric push rod, used to drive the take-up roller or dust removal roller to move in a linear direction, so as to realize the dynamic adjustment of the distance between the two.

[0010] Preferably, the dust removal roller is a negative pressure suction roller, which includes a roller body and a negative pressure chamber inside the roller body. The length direction of the negative pressure chamber is parallel to the axis of the roller body, and multiple negative pressure chambers are arranged in a ring array along the circumference of the roller body. The negative pressure chamber has an external negative pressure port on the side wall of the roller body for adsorbing dust on the surface of the material belt under negative pressure. Annular negative pressure connectors are respectively provided at both axial ends of the roller body. The negative pressure connectors are connected to an external negative pressure source, so that the dust removal roller can continuously maintain the negative pressure adsorption function during rotation.

[0011] Furthermore, the negative pressure connector and the roller body adopt a rotary sealing sliding connection structure to maintain airtightness and achieve stable negative pressure supply when the roller body rotates.

[0012] Furthermore, the negative pressure connector includes a first connector and a second connector arranged circumferentially around the roller body. The first connector corresponds to the working area where the roller body contacts the material belt, and the second connector is located in the non-contact area. Together, they form a complete annular interface around the end of the roller body. The negative pressure source connected to the first connector provides a first negative pressure value, and the negative pressure source connected to the second connector provides a second negative pressure value. The first negative pressure value is greater than the second negative pressure value. The first connector actively removes dust from the surface of the material belt through the corresponding negative pressure chamber, and the second connector is used to continuously extract the dust-laden airflow that has been sucked into the negative pressure chamber to prevent dust backflow or blockage.

[0013] Furthermore, the first joint is divided into a central region and two end regions along the circumference of the roller body. The central region corresponds to the operating area where the material strip is in stable contact with the dust removal roller during the winding process, and the two end regions correspond to the transition areas for the material strip entering and leaving the dust removal area, respectively. The negative pressure value provided by the first joint in the central region is higher than that in the two end regions, and the negative pressure value gradually decreases continuously or stepwise from the central region to the two end regions to reduce the shaking or deviation of the material strip caused by the sudden change in adsorption force when entering and leaving the dust removal area.

[0014] The main technical effects of this invention are reflected in the following aspects: This invention cleverly utilizes the inner and outer surfaces formed by the wound strip during the winding process, setting corresponding dust removal paths for each: when the electrode enters the winding roller, its uncovered inner surface is first wiped or adsorbed by the pre-dust removal unit; while as the roll diameter gradually increases, the outer surface of the wound portion continues to be in contact with the rotating dust removal roller, receiving reverse dynamic wiping or negative pressure adsorption. This closed-loop structure of "winding and cleaning simultaneously" allows the electrode to complete double-sided dust removal while winding, avoiding the dead corners and secondary pollution problems existing in traditional offline or single-sided dust removal methods.

[0015] The dust removal roller of this invention has multiple independent negative pressure chambers extending axially and distributed circumferentially inside, and is connected to an external negative pressure source through annular negative pressure connectors at both ends. The first connector (working area) is connected to a high negative pressure source for actively adsorbing dust, while the second connector (non-working area) is connected to a lower negative pressure source for continuously extracting dust-laden airflow. This "adsorption + extraction" separation design not only prevents dust from accumulating and clogging within the negative pressure chambers, but also forms a directional airflow channel, improving dust removal efficiency.

[0016] This invention is fully adapted to the industry practice of "using large-diameter winding after slitting". Large-diameter winding can provide a sufficient initial roll diameter, allowing the outer surface of the electrode to establish stable contact with the dust removal roller from the initial winding stage, providing a physical basis for "reverse rubbing dust removal on the outer surface". Under this premise, the dust removal module is directly integrated near the winding rack, eliminating the need for an additional independent dust removal station. This saves space, reduces the exposure path of the electrode, and lowers the risk of secondary contamination. It embodies the integrated concept of "determining the structure based on the process and promoting the function based on the structure", significantly improving the compactness of the equipment and the compatibility of the production line. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the present invention; Figure 2 This is a side view of the structure of the present invention; Figure 3 for Figure 1 Schematic diagram of the structure of the dust removal roller; In the diagram: 1. Frame; 2. Take-up roller; 3. Dust removal roller; 31. Roller body; 32. Negative pressure chamber; 33. First joint; 34. Second joint; 4. Limiting roller. Detailed Implementation

[0018] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, so as to make the technical solution of the present invention easier to understand and master. In the embodiments, it should be understood that the terms "middle," "upper," "lower," "top," "right side," "left end," "above," "back," "center," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, 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 the present invention. In addition, unless otherwise specified in this specific embodiment, the connection or fixing method between components can be achieved by bolt fixing, pin fixing, or pin connection commonly used in the prior art, etc., and therefore will not be described in detail in this embodiment.

[0019] The battery electrode slitting and dust removal equipment provided by this invention is mainly used in the winding stage after electrode slitting in the lithium battery manufacturing process. It is used to efficiently remove metal dust, coating debris, and environmental particles generated on both sides of the electrode during the slitting process. However, it is not limited to this and can also be used in other similar continuous processing production processes of strip materials, such as the slitting and winding stages of photovoltaic backsheet films, copper foils, aluminum foils, separators, or other flexible functional materials with high cleanliness requirements.

[0020] Furthermore, as common knowledge in this industry, the winding tension control, web guiding mechanism, guide roller arrangement, negative pressure source system, and rotary sealing structure mentioned above are all standard technical methods in the field of winding equipment. The above content is common knowledge and understanding among those skilled in the art, therefore its specific principles and structures will not be elaborated upon further.

[0021] Example 1 This embodiment discloses a battery electrode separation and dust removal device. See [link to documentation]. Figure 1 The system includes a frame 1, on which a take-up roller 2 and a dust removal roller 3 are rotatably mounted. The take-up roller 2 is used to wind the slit electrode strip, while the dust removal roller 3 is used to efficiently remove dust from the surface of the strip. Notably, at least one of the take-up roller 2 and the dust removal roller 3 is mounted on the frame 1 via a linear guide mechanism, allowing the distance between them to automatically and dynamically adjust as the strip diameter increases during winding, thus maintaining stable contact between the outer layer of the strip and the dust removal roller 3. For example, when the diameter of the strip on the take-up roller 2 increases from the initial Φ600mm to Φ800mm, the linear guide mechanism (which can be a slide rail-slider assembly, a linear guide post-bearing combination, or an electric push rod drive unit) drives the take-up roller 2 to smoothly retreat in a direction perpendicular to its axis, thereby maintaining stable contact between the outermost layer of the strip and the surface of the dust removal roller 3. This design completely eliminates the dust removal failure problem caused by excessive gaps in traditional fixed-gap structures at large roll diameters, while also avoiding tension fluctuations or electrode damage caused by excessively small gaps.

[0022] Preferred, see Figure 2The axis of the dust removal roller 3 is parallel to the axis of the take-up roller 2, and the two are arranged adjacent to each other. Before entering the winding process, the material strip first passes over the surface of the dust removal roller 3. At the same time, the outer layer of the wound material strip continues to be in contact with the dust removal roller 3. More importantly, during the winding process, the side facing the take-up roller 2 is defined as the inner side, and the side facing away from the take-up roller 2 is defined as the outer side. Both the take-up roller 2 and the dust removal roller 3 are located on the inner side of the material strip. Before the inner side of the material strip is attached to the take-up roller 2 to complete the winding, it passes through the dust removal roller 3 for dust removal. During the subsequent winding process, the outer side of the wound material strip will contact the dust removal roller 3, thereby performing dust removal on the outer side of the material strip after winding is completed. This allows the dust removal operation to be completed on the inner and outer surfaces of the material strip at different times using a single dust removal roller 3. By designing the conveyor path, only one set of dust removal rollers 3 is needed to effectively clean the inner and outer surfaces of the electrode at different times, eliminating the need for two independent dust removal units in the traditional solution, thus significantly reducing equipment cost, size and energy consumption.

[0023] It should be further explained that the width of the master roll before slitting is usually over one meter, possessing high lateral bending stiffness, allowing for stable winding with a smaller core diameter. However, the width of the individual electrode strips formed after slitting decreases, and their bending resistance weakens drastically, making them highly susceptible to defects such as edge collapse, serpentine winding, and flaring under tension. If a small-diameter winding core is still used at this stage, it is not only difficult to maintain the roundness of the roll, but the excessively small bending radius can also cause cracking and powdering of the brittle coating, seriously affecting battery safety and consistency. Therefore, the industry generally adopts larger-diameter winding frames to improve support rigidity, reduce bending stress, and ensure winding quality. Against this backdrop, the "single-roller double-sided dynamic contact dust removal" method proposed in this invention is highly suitable for the process characteristics of large-diameter winding after slitting, for the following reasons: First, this dust removal method relies on the outer layer of the material strip continuously adhering to the dust removal roller 3 during the winding process. The establishment and maintenance of this adhesion relationship requires a relatively large initial roll diameter. If the roll diameter is too small in the early stages of winding (e.g., using a small-diameter mandrel), the initial wrap angle formed by the electrode sheet on the take-up roller 2 is extremely small, and it may even fail to effectively contact the adjacent dust removal roller 3, causing the "outer side reverse rubbing dust removal" stage to fail to start. In other words, a significant gap exists between the small-diameter unwinding strip and the dust removal roller 3, resulting in the loss of dynamic adhesion conditions and the failure of the double-sided dust removal function.

[0024] Secondly, the large-diameter winding frame significantly increases the initial roll diameter, thus forming a sufficiently large outer arc surface at the beginning of winding, which can immediately establish stable contact with the dust removal roller 3. This allows the outer surface of the wound portion to be simultaneously wiped and dusted from the initial stage of winding, truly achieving a closed-loop cleaning process of "inner side forward dust removal + outer side reverse wiping dust removal".

[0025] Finally, the slow roll diameter growth rate brought about by the large-diameter winding (compared to the small core diameter, the diameter increase is more gradual with the same number of turns) is more conducive to the linear guide mechanism to make precise and stable dynamic adjustment of the distance between the take-up roller 2 and the dust removal roller 3, avoiding contact pressure fluctuations caused by sudden changes in roll diameter, and further ensuring dust removal consistency.

[0026] Furthermore, in terms of motion coordination, the rotation direction of the take-up roller 2 is the same as that of the dust removal roller 3. During the tape winding process, when the inner side of the tape passes through the dust removal roller 3 for dust removal, the running direction of the tape is consistent with the rotation direction of the dust removal roller 3, forming forward contact. In the subsequent winding stage, when the outer side of the wound tape contacts the dust removal roller 3 and receives dust removal, the rotation direction of the outer side of the tape is opposite to the running direction of the dust removal roller 3, forming reverse contact. This composite motion mode of "forward entry + reverse rubbing" not only ensures the stability of the tape travel but also enhances the peeling and suction effect of attached dust, making it particularly suitable for the removal of fine particles.

[0027] It should be further explained that in the conveyor path design of this equipment, after the material belt is drawn from the slitting station, it first passes around the dust removal roller 3 (located below or to the side of the take-up roller 2), and then enters the take-up roller 2 for winding via the guide roller. In the initial stage, the unwound electrode sheets adhere to the surface of the dust removal roller 3 in a straight or slightly arc-shaped path. At this time, its forward direction is consistent with the rotation direction of the dust removal roller 3, forming a "forward entry," which is a unidirectional transmission process driven by active traction (such as traction rollers or winding tension). However, once the electrode sheets begin to wind on the take-up roller 2, its shape changes from a "straight conveyor belt" to a "spiral winding body." As the roll diameter continues to increase, the outer layer of the wound electrode sheets actually makes a circular motion around the take-up roller 2. When the outer electrode comes into contact with the adjacent dust collector roller 3 again, its local movement direction is determined by the winding rotation: if the take-up roller 2 rotates clockwise to wind, its surface linear velocity direction is from top to bottom (assuming the dust collector roller 3 is located below); and the dust collector roller 3, in order to cooperate with the initial winding, is usually also set to rotate clockwise, and its surface linear velocity direction is from bottom to top. Therefore, in the middle and later stages of winding, the outer surface of the wound electrode exhibits a "top to bottom" movement trend relative to the surface of the dust collector roller 3, which is opposite to the "bottom to top" surface velocity direction of the dust collector roller 3, naturally forming "reverse rubbing".

[0028] In other words, "forward entry" only occurs at the moment when the unwound free section of the electrode first contacts the dust removal roller 3. During the later stages of winding, the outer layer of the electrode, already wound and rotating with the take-up roller 2, participates in dust removal. Its movement direction is dominated by the winding rotation and cannot maintain the same direction as the dust removal roller 3. Forcibly adjusting the direction of the dust removal roller 3 to achieve "forward entry" would cause the initial stage to become reverse friction, leading to sudden tension changes, electrode vibration, and even tape breakage, severely affecting the winding quality. Furthermore, from a process effect perspective, the strong cleaning effect of "reverse friction" is precisely needed in the later stages. At this point, the electrode has completed most of its transfer, and its surface may re-adsorb environmental dust due to static electricity and airflow disturbances. Additionally, dust from the inner layer may be squeezed to the outer layer during winding. Reverse relative motion generates greater shear force and airflow disturbance, more effectively stripping away these secondary contaminant particles. The forward entry mode, however, is insufficiently cleaned at this stage due to its lower relative speed and shorter action time.

[0029] Furthermore, to ensure a constant contact position between the material strip and the dust removal roller 3, unaffected by tension fluctuations, a limiting roller 4 is also provided on the frame 1. The limiting roller 4 is matched with the dust removal roller 3, and their relative positions remain fixed. The limiting roller 4 and the dust removal roller 3 are located on opposite sides of the material strip, and under the pressure of the limiting roller 4, the material strip remains in close contact with the surface of the dust removal roller 3 during operation, thus ensuring a constant contact position between the dust removal roller 3 and the material strip. In addition, a guide roller is also provided on the frame 1. During the winding process, the inner side of the material strip passes sequentially around the dust removal roller 3 and the guide roller before entering the take-up roller 2. This guide roller not only serves a guiding function but also works in conjunction with the limiting roller 4 to adjust the wrap angle of the material strip, optimizing the contact pressure distribution in the dust removal area.

[0030] Preferred, see Figure 3 The dust removal roller 3 is a negative pressure suction roller, comprising a hollow roller body 31. A negative pressure chamber 32 is provided within the roller body 31, with its length parallel to the axis of the roller body 31. Multiple negative pressure chambers 32 are arranged in a ring array along the circumference of the roller body 31. Each negative pressure chamber 32 has an external negative pressure port on the side wall of the roller body 31, used to adsorb dust from the surface of the material belt under negative pressure. To achieve continuous negative pressure supply during rotation, annular negative pressure connectors are provided at both axial ends of the roller body 31. These connectors are connected to an external negative pressure source, enabling the dust removal roller 3 to continuously maintain its negative pressure adsorption function during rotation. A rotary sealing sliding connection structure (such as a mechanical seal or graphite sealing ring) is used between the negative pressure connector and the roller body 31 to maintain airtightness and achieve stable negative pressure supply when the roller body 31 rotates.

[0031] The negative pressure connector is designed with functional partitions. The negative pressure connector is sealed and divided into a first connector 33 and a second connector 34 along the circumference of the roller body 31. The first connector 33 corresponds to the working area where the roller body 31 actually contacts the material belt (i.e., the arc section covered by the material belt), and is connected to a high negative pressure source to provide strong adsorption force to actively remove surface contaminants. The second connector 34 corresponds to the non-contact area (i.e., the idling area not covered by the material belt), and is connected to a lower negative pressure source. It is mainly used to continuously extract the dust-laden airflow that has been sucked into the negative pressure chamber 32 to form a directional airflow channel, effectively preventing dust from depositing, flowing back, or blocking the negative pressure port in the chamber, thereby ensuring the reliability and dust removal efficiency of long-term operation.

[0032] Furthermore, the first joint 33 is divided into a central region and two end regions along the circumference of the roller body 31. The central region corresponds to the operating area where the material strip is in stable contact with the dust removal roller 3 during the winding process, and the two end regions correspond to the transition areas for the material strip entering and leaving the dust removal area, respectively. The negative pressure value provided by the first joint 33 in the central region is higher than that in the two end regions, and the negative pressure value gradually decreases continuously or stepwise from the central region to the two end regions to reduce the shaking or deviation of the material strip caused by the sudden change in adsorption force when entering and leaving the dust removal area.

[0033] It should be further explained that after the electrode is slit, the width is significantly reduced, and its lateral rigidity drops sharply. It is very easy to shake, serpentine, or even wrinkle during transmission and winding. At the same time, the surface coating is extremely sensitive to mechanical contact due to its high brittleness. Against this backdrop, negative pressure adsorption dust removal offers several advantages: First, it is a non-contact or micro-contact cleaning method that removes dust through airflow adsorption rather than physical scraping, effectively avoiding mechanical damage, coating peeling, or static electricity buildup caused by traditional brushes or scrapers to narrow electrode sheets. Second, negative pressure suction actively captures and removes dust particles, preventing them from being re-entrained and re-attached to adjacent electrode sheets in confined spaces, which is particularly crucial for lithium battery manufacturing with high cleanliness requirements. Third, combined with zoned gradient negative pressure control (such as strong suction in the center and gentle suction at the edges), it can significantly reduce edge shaking and tension fluctuations caused by sudden changes in adsorption force when electrode sheets enter and exit the dust removal area, while ensuring efficient dust removal in the central area, thus improving the stability of narrow-band operation. In addition, the negative pressure system can be integrated with a winding structure, utilizing the stable wrap angle formed by a large-diameter winding to achieve dynamic dust removal on both sides through "forward entry + reverse wiping," further improving cleaning coverage.

[0034] Of course, the above are just typical examples of the present invention. In addition, the present invention may have many other specific embodiments. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by the present invention.

Claims

1. A battery electrode separation and dust removal device, characterized in that, The device includes a frame on which a receiving roller and a dust removal roller are rotatably mounted. At least one of the receiving roller and the dust removal roller is mounted on the frame via a linear guide mechanism to achieve dynamic adjustment of the distance between them. The axis of the dust removal roller is parallel to the axis of the take-up roller and the two are arranged adjacent to each other. Before entering the winding, the material strip first wraps around the surface of the dust removal roller. At the same time, the outer layer of the already wound material strip continues to be in contact with the dust removal roller. During the winding process, the side facing the take-up roller is defined as the inner side and the side facing away from the take-up roller is defined as the outer side. Both the take-up roller and the dust removal roller are located on the inner side of the material strip. Before the material strip is fully wound up by the take-up roller, the inner side of the strip is first treated by the dust removal roller. During the subsequent winding process, the outer side of the wound strip will come into contact with the dust removal roller, thus removing dust from the outer side of the strip after winding is completed. This allows for dust removal operations on both the inner and outer surfaces of the material strip at different times using a single dust removal roller.

2. The battery electrode separation and dust removal equipment as described in claim 1, characterized in that, The rotation direction of the receiving roller is the same as that of the dust removal roller; During the tape winding process, when the inner side of the tape passes through the dust removal roller for dust removal, the running direction of the tape is consistent with the rotation direction of the dust removal roller, forming a forward contact. During the subsequent winding stage, when the outer side of the wound strip comes into contact with the dust removal roller and receives dust removal treatment, the rotation direction of the outer side of the strip is opposite to the running direction of the dust removal roller, forming a reverse contact.

3. The battery electrode separation and dust removal equipment as described in claim 1, characterized in that, The frame is also equipped with a limiting roller, which is matched with the dust removal roller and the relative position between the two remains fixed. The limiting roller and the dust removal roller are located on opposite sides of the material belt. Under the pressing action of the limiting roller, the material belt is kept in close contact with the surface of the dust removal roller during operation, thereby ensuring that the contact position between the dust removal roller and the material belt remains constant.

4. The battery electrode separation and dust removal equipment as described in claim 1, characterized in that, The frame is also equipped with guide rollers; during the material strip winding process, the inner side of the material strip passes through the dust removal roller and the guide roller in sequence before entering the take-up roller, before it is attached to the take-up roller to complete the winding.

5. The battery electrode separation and dust removal equipment as described in claim 1, characterized in that, The guiding direction of the linear guiding mechanism is arranged perpendicular to the axis of the take-up roller; The linear guiding mechanism includes any one of the following: a slide rail and slider assembly, a linear guide post and linear bearing combination, or a displacement adjustment unit driven by a pneumatic / electric push rod, used to drive the receiving roller or dust removal roller to move in a linear direction, so as to realize the dynamic adjustment of the distance between the two.

6. The battery electrode separation and dust removal equipment as described in any one of claims 1 to 5, characterized in that, The dust removal roller is a negative pressure suction roller. The dust removal roller includes a roller body, and a negative pressure chamber is provided inside the roller body. The length direction of the negative pressure chamber is parallel to the axis of the roller body, and multiple negative pressure chambers are arranged in a ring array along the circumference of the roller body. The negative pressure chamber has an external negative pressure port on the side wall of the roller body for adsorbing dust on the surface of the material belt under negative pressure. The roller body is provided with annular negative pressure connectors at both ends of its axial direction. The negative pressure connectors are connected to an external negative pressure source, so that the dust removal roller can continuously maintain the negative pressure adsorption function during rotation.

7. The battery electrode separation and dust removal equipment as described in claim 6, characterized in that, The negative pressure connector and the roller body adopt a rotary sealing sliding connection structure to maintain airtightness and achieve stable negative pressure supply when the roller body rotates.

8. The battery electrode separation and dust removal equipment as described in claim 7, characterized in that, The negative pressure connector includes a first connector and a second connector that are separated along the circumference of the roller body. The first connector corresponds to the working area where the roller body contacts the material belt, and the second connector is located in the non-contact area. Together, they surround the end of the roller body to form a complete annular interface. The negative pressure source connected to the first connector provides a first negative pressure value, and the negative pressure source connected to the second connector provides a second negative pressure value. The first negative pressure value is greater than the second negative pressure value. The first connector actively removes dust from the surface of the conveyor belt through the corresponding negative pressure chamber. The second connector is used to continuously extract the dust-laden airflow that has been sucked into the negative pressure chamber to prevent dust backflow or blockage.

9. The battery electrode separation and dust removal equipment as described in claim 8, characterized in that, The first joint is divided into a central region and two end regions along the circumference of the roller body. The central region corresponds to the running area where the material strip is in stable contact with the dust removal roller during the winding process, and the two end regions correspond to the transition areas where the material strip enters and leaves the dust removal area, respectively. The negative pressure value provided by the first connector in the central region is higher than that in the two end regions, and the negative pressure value gradually decreases continuously or stepwise from the central region to the two end regions to reduce the shaking or deviation of the material belt caused by sudden changes in adsorption force when entering and leaving the dust removal area.

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