Pole piece cleaning system

Abstract

The invention provides a cleaning system for a pole piece, the pole piece comprises a pole lug, and the cleaning system comprises a conveying device, a cleaning device and a solvent spraying device; wherein the conveying device is used for conveying the pole piece along a conveying path in a first direction; the cleaning device is arranged on the conveying path and comprises a plurality of cleaning brushes, the cleaning brushes are arranged at intervals in the second direction, and the second direction intersects with the first direction; each cleaning brush is connected with the solvent spraying device, the solvent spraying device is used for spraying a solvent to the tabs, and the cleaning brushes are used for cleaning the tabs sprayed with the solvent. The solvent activation device sprays out a solvent to dissolve active substances attached to the tabs before the cleaning brush makes contact with the tabs, the active substances can be conveniently peeled off under the action of the cleaning brush, the cleaning effect of the cleaning brush can be improved, and meanwhile the tabs are prevented from being damaged.

Description

Technical Field

[0001] The present invention relates to the technical field of pole pieces, and in particular to a pole piece cleaning system. Background Art

[0002] The production of battery pole pieces requires processes such as coating, rolling, and die-cutting. During the coating process, the metal substrate in the middle of the pole piece is covered with an active material coating, leaving the metal substrate at the edge exposed. The exposed metal substrate at the edge is then used to cut the pole lugs during the die-cutting process. However, coating anomalies during the coating process can cause material leakage at the pole piece edges. After entering the rolling process, the leaked material at the pole piece edges solidifies and forms hard particles, affecting the edge grip judgment during the die-cutting process. Leaked material can also occur on the cut pole lugs, and the conductive leakage increases the risk of short circuits in the pole lugs, which also affects welding quality.

[0003] In the prior art, the electrode is cleaned with a brush, and the relative movement of the brush and the electrode is used to scrape off the leaked material attached to the edge of the electrode. However, the brush cannot effectively remove the leaked material in a bonded state, especially when the width of the coated leaked material is large, the cleaning efficiency will further decrease. Summary of the Invention

[0004] An embodiment of the present invention provides a cleaning system for a pole piece to solve the problem of low efficiency of material leakage when cleaning a pole tab with a brush in the related art.

[0005] In order to solve the above-mentioned technical problems, the present invention is achieved as follows:

[0006] An embodiment of the present invention provides a cleaning system for a pole piece, wherein the pole piece includes a pole lug, and the cleaning system includes: a conveying device, a cleaning device, and a solvent spraying device; wherein,

[0007] The conveying device is used to convey the pole piece along a conveying path in a first direction;

[0008] The cleaning device is arranged on the conveying path, and the cleaning device includes a plurality of cleaning brushes, and the plurality of cleaning brushes are arranged at intervals along a second direction, and the second direction intersects with the first direction;

[0009] Each of the cleaning brushes is connected to the solvent spraying device, the solvent spraying device is used to spray the solvent onto the tab, and the cleaning brush is used to clean the tab sprayed with the solvent.

[0010] Optionally, the cleaning system further includes a leakage detection device, which is arranged on the conveying path, and the conveying path has an incoming material end and an outgoing material end. The leakage detection device is arranged on the side of the cleaning device close to the incoming material end, and the leakage detection device is electrically connected to the cleaning device and the solvent injection device. The leakage detection device is used to detect the leakage area on the tab and transmit the detection data to the cleaning device and the solvent injection device to control the start and stop of the cleaning device and the solvent injection device.

[0011] Optionally, the cleaning system has a first working mode and a second working mode. When the leakage area is smaller than a preset threshold, the cleaning system enters the first working mode, and the cleaning device has a first working frequency; when the leakage area is greater than or equal to the preset threshold, the cleaning system enters the second working mode, and the cleaning device has a second working frequency; wherein, the first working frequency is smaller than the second working frequency.

[0012] Optionally, the cleaning device further includes a rotating shaft, which is provided on the conveying device, and a plurality of cleaning brushes are spaced apart on the rotating shaft, and the rotating shaft is used to drive the cleaning brushes to rotate, and the rotation of the cleaning brushes is synchronized with the injection of the solvent injection device.

[0013] Optionally, the cleaning system further comprises a negative pressure dust removal device, the negative pressure dust removal device is arranged on the conveying path, the conveying path has an incoming end and an outgoing end, and the negative pressure dust removal device is arranged on a side of the cleaning device close to the outgoing end;

[0014] The negative pressure dust removal device includes a dust removal pipe and a dust removal hood. The dust removal hood is arranged above the transmission path. The dust removal hood is connected to the dust removal pipe. The dust removal pipe is used to provide negative pressure to the dust removal hood. The dust removal hood is used to absorb the leaked material on the pole ear and send the leaked material into the dust removal pipe.

[0015] Optionally, a plurality of suction nozzles are provided on a side of the dust removal cover facing the conveying path, the suction nozzles correspond one-to-one to the cleaning brushes, and the suction nozzles are arranged obliquely to the conveying path.

[0016] Optionally, among the multiple cleaning brushes, some of the cleaning brushes form the first cleaning group, and another part of the cleaning brushes form the second cleaning group, and the number of the cleaning brushes in the first cleaning group is the same as the number of the cleaning brushes in the second cleaning group; the first cleaning group and the second cleaning group are arranged at intervals on the conveying path along the first direction, the first cleaning group is arranged close to the incoming material end, and the second cleaning group is arranged close to the outgoing material end.

[0017] Optionally, the cleaning brushes in the first cleaning group are steel brushes, and the cleaning brushes in the second cleaning group are nylon brushes.

[0018] Optionally, the dust hood includes a first dust hood and a second dust hood, the first dust hood is arranged on the side of the first cleaning group close to the second cleaning group, and the second dust hood is arranged on the side of the second cleaning group away from the first cleaning group, and the first dust hood and the second dust hood are respectively connected to the dust removal duct.

[0019] Optionally, the solvent spraying device includes a liquid storage bottle and a conduit, one end of the conduit is connected to the liquid storage bottle, and the other end of the conduit is connected to the cleaning brush, and the conduit is used to spray the solvent in the liquid storage bottle onto the tab.

[0020] The present invention provides a cleaning system for electrode tabs, comprising a conveying device, a cleaning device, and a solvent spraying device. Multiple cleaning brushes in the cleaning device are positioned corresponding to the tabs on the electrode tabs. The relative motion between the tabs and the cleaning brushes generates friction, thereby cleaning active material splashed from the tabs. A solvent activation device sprays solvent to dissolve the active material attached to the tabs before the cleaning brushes come into contact with the tabs, facilitating their removal by the cleaning brushes. This improves the cleaning effectiveness of the cleaning brushes while preventing damage to the tabs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram showing the overall structure of a pole piece cleaning system provided by an embodiment of the present invention;

[0022] Figure 2 express Figure 1 A schematic diagram of a pole piece on a conveyor in a cleaning system shown;

[0023] Figure 3 express Figure 1 Schematic diagram of the cleaning device and solvent spraying device shown;

[0024] Figure 4 express Figure 1 Schematic diagram of the leakage detection device shown;

[0025] Figure 5 express Figure 1 Schematic diagram of the negative pressure dust removal device shown.

[0026] Reference numerals:

[0027] 10: Conveying device; 20: Cleaning device; 21: Rotating shaft; 22: Cleaning brush; 23: Motor; 30: Solvent spraying device; 31: Liquid storage bottle; 32: Liquid pump; 33: Conduit; 40: Leakage detection device; 50: Negative pressure dust removal device; 51: Dust removal duct; 52: Dust removal hood; 200: Pole piece; 210: Pole ear; 220: Coating area. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] It should be understood that references throughout this specification to "one embodiment" or "an embodiment" mean that a particular feature, structure, or characteristic associated with the embodiment is included in at least one embodiment of the present invention. Therefore, the appearances of "in one embodiment" or "in an embodiment" throughout this specification do not necessarily refer to the same embodiment. Furthermore, these particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0030] An embodiment of the present invention provides a cleaning system for a pole piece 200, wherein the pole piece 200 includes a pole ear 210, and the cleaning system includes: a conveying device 10, a cleaning device 20 and a solvent injection device 30; wherein the conveying device 10 is used to convey the pole piece 200 along a conveying path in a first direction; the cleaning device 20 is arranged on the conveying path, and the cleaning device 20 includes a plurality of cleaning brushes 22, and the plurality of cleaning brushes 22 are arranged at intervals along a second direction, and the second direction intersects with the first direction; each cleaning brush 22 is connected to the solvent injection device 30, and the solvent injection device 30 is used to spray a solvent onto the pole ear 210, and the cleaning brush 22 is used to clean the pole ear 210 sprayed with the solvent.

[0031] The pole piece 200 in this embodiment refers to an uncut current collector loaded with active material, and the pole tab 210 refers to the area on the current collector used to cut and form the pole tab, which is different from the pole piece and pole tab directly used in lithium battery products. The current collector is aluminum foil or copper foil, and the surface of the current collector is divided into a coating area 220 and a pole tab area. The coating area 220 is used to carry the active material and is covered by the active material coating during the coating process. The pole tab area is used to cut the pole tab in the die-cutting process. The surface of the current collector in the pole tab area is exposed and is not coated during the coating process. During the coating process, due to coating defects, a small amount of material may leak on the pole tab that should not be covered by the active material. After the leaked material solidifies, it forms hard particles, affecting subsequent processing and the performance of the pole piece 200.

[0032] The cleaning system cleans the leaked material on the tab 210. The cleaning system is installed after the coating process and before the die-cutting process, and can be carried out simultaneously with the rolling process. The coated pole piece 200 is transported by the conveyor 10 along the first direction to the cleaning device 20 for cleaning. The coating area 220 and the tab 210 on the pole piece 200 both extend along the first direction. The cleaning brush 22 on the cleaning device 20 continuously cleans the pole piece 200 fed along the first direction. It can be understood that the position of the cleaning brush 22 corresponds to the tab 210 on the pole piece 200. The cleaning brush 22 only cleans the tab 210 and does not affect the active material coating in the coating area 220. Depending on the production process, multiple coating areas 220 and tabs 210 can be arranged at intervals on the pole piece 200. Accordingly, the number of cleaning brushes 22 is also multiple. The multiple cleaning brushes 22 are arranged at intervals along the second direction, with the first and second directions perpendicular to each other. At least one cleaning brush 22 is provided for each tab area.

[0033] The cleaning system also includes a solvent spraying device 30, which is used to spray a solvent onto the tab 210. The solvent is 95% ethanol or electronic-grade anhydrous ethanol. The hard particles on the tab 210 are softened and dissolved by the solvent, and the softened particles are more easily removed by the cleaning brush 22. The solvent spraying device 30 is also provided in correspondence with the tab 210, and the solvent is only sprayed onto the tab 210 to avoid damage to the active material coating in the coating area 220.

[0034] Furthermore, each cleaning brush 22 is connected to a solvent spraying device 30. Solvent is sprayed intermittently in front of the cleaning brush 22, with high pressure released instantaneously to form a fixed-point atomization or high-speed jet, avoiding the accumulation of droplets caused by continuous spraying. Spraying in front of and close to the cleaning brush 22 can reduce solvent volatilization and achieve a better softening effect.

[0035] In some optional embodiments, the solvent spraying device 30 includes a liquid storage bottle 31 and a conduit 33, one end of the conduit 33 is connected to the liquid storage bottle 31, and the other end of the conduit 33 is connected to the cleaning brush 22, and the conduit 33 is used to spray the solvent in the liquid storage bottle 31 onto the tab 210.

[0036] Each cleaning brush 22 is connected to at least one conduit 33, which transports the solvent in the liquid storage bottle 31 to the cleaning brush 22. A liquid pump 32 is provided on the conduit 33 to achieve intermittent injection of the solvent according to a preset frequency and pressure. The liquid pump 32 precisely controls the amount of solvent sprayed to ensure that the solvent can be evenly covered on the tab 210 without excessive waste or affecting subsequent processes. The injection of solvent and the cleaning of the cleaning brush 22 are synchronized. This design not only saves the amount of solvent used, but also avoids the accumulation of droplets caused by continuous injection, achieving a better cleaning effect.

[0037] The cleaning system in this embodiment accurately removes the leaked material splashed on the pole tab 210 during the coating process without affecting the coating, avoiding affecting the edge grabbing judgment in the die-cutting process and the performance of the finished pole piece 200. During the cleaning process, the cleaning brushes 22 are made of soft and wear-resistant materials. They gently brush across the surface of the pole tab 210, effectively removing residual leaked material and impurities while avoiding any damage to the pole tab 210. The entire cleaning process is efficient and automated, greatly improving production efficiency and product quality. In addition, the number and position of the cleaning brushes 22 in the cleaning device 20 and the conduits 33 in the solvent injection device 30 can be adjusted according to the actual situation of the pole piece 200 to be processed. They have good compatibility and can adapt to the cleaning needs of pole pieces 200 of different specifications and types, providing a strong guarantee for quality control in the battery manufacturing process.

[0038] In addition, in some optional embodiments, the cleaning system also includes a leakage detection device 40, which is arranged on a conveying path, and the conveying path has an incoming material end and an outgoing material end. The leakage detection device 40 is arranged on the side of the cleaning device 20 close to the incoming material end. The leakage detection device 40 is electrically connected to the cleaning device 20 and the solvent injection device 30. The leakage detection device 40 is used to detect the leakage area on the tab 210 and transmit the detection data to the cleaning device 20 and the solvent injection device 30 to control the start and stop of the cleaning device 20 and the solvent injection device 30.

[0039] The leakage detection device 40 is positioned before the cleaning device 20 and the solvent spray device 30 to detect leaks on the incoming electrode 200 in real time. The leakage detection device 40 detects leaks by using an image sensor to capture an image of the electrode 200 to be processed. The processor analyzes the image, measures the leaked area to scale, and controls the start and stop of the cleaning device 20 and the solvent spray device 30 based on the calculated leaked area. The image sensor can be a charge coupled device (CCD).

[0040] When the leakage detection device 40 detects a leak, the cleaning device 20 and the solvent injection device 30 activate to clean the tab 210, preventing the equipment from idling when the tab 210 does not need cleaning. The processor also records the results of each leakage detection, as well as the operating status of the cleaning device 20 and the solvent injection device 30, providing data support for subsequent process optimization and quality control. This design not only improves the efficiency and accuracy of the electrode 200 cleaning, but also helps reduce production costs and improve product quality.

[0041] The leakage detection device 40 at the incoming material end is used to determine whether the electrode 200 is leaking and to control the start and stop of the cleaning device 20 and the solvent injection device 30. In this embodiment, a leakage detection device 40 can also be installed at the outgoing material end to detect whether there is any residual leakage on the cleaned electrode 200. If there is still leakage on the electrode 200, the incompletely cleaned electrode 200 will be screened out and a secondary cleaning will be performed, or the operating frequency of the cleaning device 20 and the solvent injection device 30 will be adjusted to ensure that the cleaning capacity of the cleaning system meets actual needs. This ensures that the electrode 200 is fully cleaned without affecting other subsequent processes, thereby improving product quality.

[0042] In addition, in some optional embodiments, the cleaning system has a first working mode and a second working mode. When the leakage area is smaller than a preset threshold, the cleaning system enters the first working mode, and the cleaning device 20 has a first working frequency; when the leakage area is greater than or equal to the preset threshold, the cleaning system enters the second working mode, and the cleaning device 20 has a second working frequency; wherein the first working frequency is smaller than the second working frequency.

[0043] When the leakage detection device 40 detects a leakage, the processor sends a signal to the cleaning device 20 and the solvent spraying device 30 to start the cleaning and solvent spraying process. Depending on the area of ​​the leakage, the cleaning system has a first operating mode and a second operating mode. The first operating mode is a low-frequency mode, and the cleaning system has a relatively low cleaning ability, which is suitable for cases where the leakage on the surface of the tab 210 is not serious. The second operating mode is a high-frequency mode, and the cleaning system has a stronger cleaning ability and can effectively clean the tab 210 with serious leakage.

[0044] In this embodiment, the preset threshold is that the leakage area accounts for 5% of the area of ​​the tab 210. When the leakage area is less than 5%, the cleaning system enters the first operating mode, and the cleaning device 20 has a lower operating frequency. When the leakage area is equal to or greater than 5%, the cleaning system enters the second operating mode, and the cleaning device 20 has a higher operating frequency. The cleaning system's cleaning capacity is adaptively adjusted according to the severity of the leakage, ensuring that the leaked material can be effectively removed without causing unnecessary damage to the tab 200.

[0045] Accordingly, in the first and second operating modes, in addition to the different operating frequencies of the cleaning device 20, the solvent spraying device 30 also sprays the solvent onto the tab 210 at different frequencies and pressures. In the first operating mode, the solvent spraying device 30 sprays the solvent onto the tab 210 at a lower frequency and pressure to reduce solvent waste and ensure that the solvent is evenly covered on the surface of the tab 210, thereby achieving the cleaning purpose. In the second operating mode, due to the larger area of ​​leaked material, a stronger cleaning force and more solvent are required to remove the leaked material. Therefore, the solvent spraying device 30 sprays the solvent onto the tab 210 at a higher frequency and pressure.

[0046] The cleaning device 20 and solvent spray device 30 dynamically adjust the cleaning force and solvent spray volume in real time based on the size of the leaking material. This dynamic adjustment mechanism enables the cleaning system to intelligently adjust to the actual leaking material situation, thereby maximizing cleaning efficiency and solvent utilization while ensuring effective cleaning. Furthermore, this cleaning system boasts a high degree of automation, significantly reducing operator workload and improving production efficiency.

[0047] It should be noted that this embodiment does not exclude manual adjustment of the working frequencies of the cleaning device 20 and the solvent injection device 30. The staff can set the working frequencies of the cleaning device 20 and the solvent injection device 30 and the preset threshold value of the leakage area during automatic adjustment at the operating terminal. The cleaning system can also further set the third working mode, the fourth working mode, etc. according to the size of the leakage area, and perform multi-level dynamic adjustment to provide a more flexible operation method in actual production.

[0048] In addition, in some optional embodiments, the cleaning device 20 also includes a rotating shaft 21, which is arranged on the conveying device 10, and a plurality of cleaning brushes 22 are spaced apart on the rotating shaft 21. The rotating shaft 21 is used to drive the cleaning brushes 22 to rotate, and the rotation of the cleaning brushes 22 is synchronized with the injection of the solvent injection device 30.

[0049] like Figure 3 As shown, multiple cleaning brushes 22 are spaced apart on a rotating shaft 21. The rotating shaft 21 drives the cleaning brushes 22 to rotate and clean the tabs 210. The rotating shaft 21 is driven by a motor 23, which precisely controls the rotation speed and direction of the rotating shaft 21 to achieve precise synchronization with the solvent spraying device 30. The rotation of the cleaning brushes 22 and the solvent spraying are synchronized, with a delay time of less than 50ms. The synchronized solvent spraying and the rotation of the cleaning brushes 22 can fully utilize the softening effect of the solvent, improve solvent utilization and the cleaning efficiency of the cleaning brushes 22.

[0050] Furthermore, to further enhance cleaning effectiveness, the design of the rotating shaft 21 also takes into account the varying shapes and sizes of the tabs 210. By adjusting the spacing and material of the cleaning brushes 22 on the rotating shaft 21, the cleaning requirements of different tabs 210 can be accommodated. For example, for tabs 210 with complex shapes or rough surfaces, the number and density of cleaning brushes 22 can be increased to ensure sufficient contact with the tab 210 surface, thereby thoroughly removing any dirt and spilled material adhering to the tab 210.

[0051] To monitor the effectiveness of the cleaning process, the cleaning system is also equipped with sensors that monitor the operating status of the cleaning brush 22 and solvent spray device 30 in real time. If the sensors detect severe wear of the cleaning brush 22 or a malfunction of the solvent spray device 30, the system automatically sounds an alarm and prompts the operator to promptly repair or replace it, thereby ensuring stable operation and cleaning quality of the cleaning system.

[0052] In a specific application, the injection pressure of the solvent injection device 30 is 0.3-0.6 MPa, and the injection frequency is 2-5 Hz. The injection pressure and injection frequency of the solvent injection device 30 are controlled according to the leakage area detected in real time by the leakage detection device 40 .

[0053] In addition, in some optional embodiments, the cleaning system also includes a negative pressure dust removal device 50, which is arranged on the conveying path, the conveying path has an incoming material end and a discharging material end, and the negative pressure dust removal device 50 is arranged on the side of the cleaning device 20 close to the discharging material end; the negative pressure dust removal device 50 includes a dust removal pipe 51 and a dust removal hood 52, the dust removal hood 52 is arranged above the conveying path, the dust removal hood 52 is connected to the dust removal pipe 51, the dust removal pipe 51 is used to provide negative pressure to the dust removal hood 52, and the dust removal hood 52 is used to absorb the leaked material on the pole ear 210 and send the leaked material into the dust removal pipe 51.

[0054] After the solidified particles on the surface of the tab 210 are removed by the cleaning brush 22, they float in the surrounding environment in the form of particles or powder, and some of them adhere to the surface of the pole piece 200. The dust removal cover 52 is set behind the cleaning device 20. Once the leaked material is removed, the leaked particles and powder are sucked into the dust removal cover 52 under the action of negative pressure before they firmly adhere to the pole piece 200 and the surface of the equipment. They are collected and processed by the dust removal duct 51. This prevents the floating leaked particles and powder from causing secondary contamination to the pole piece 200, and plays a certain cleaning role on the equipment, reducing the amount of leaked material adhering to the equipment and reducing the maintenance and cleaning frequency of the equipment.

[0055] In order to ensure the effective operation of the negative pressure dust removal device 50, the negative pressure dust removal device 50 is also equipped with a sensor to monitor the negative pressure in the dust removal pipe 51 in real time and adjust the negative pressure as needed to keep the negative pressure in the dust removal hood 52 stable.

[0056] In addition, in some optional embodiments, a plurality of suction nozzles are provided on the side of the dust removal cover 52 facing the conveying path, the suction nozzles correspond one-to-one to the cleaning brushes 22, and the suction nozzles are arranged obliquely to the conveying path.

[0057] The suction nozzle is arranged in correspondence with the cleaning brush 22 and the tab 210 of the electrode 200, so that the negative pressure can act more concentratedly on the tab 210 area, effectively improving the absorption efficiency of the leaked material and preventing the negative pressure from acting on the coating on the electrode 200 and damaging the coating. The suction nozzle is tilted toward the incoming material end, with an inclination angle of 30-45°, which not only enables the suction nozzle to better align with the position after the cleaning brush 22 removes the leaked material, thereby enhancing the particle capture effect, but also guides the leaked material particles and powder into the dust cover 52 in a specific direction, thereby avoiding the escape of the leaked material and secondary contamination. A guide plate with an adjustable angle is provided on the suction nozzle, and adjusting the guide plate to the corresponding position can provide a better adsorption effect. In addition, the number and arrangement of the suction nozzles can be adjusted according to actual production needs to meet the cleaning needs of electrode 200 of different specifications and sizes, further improving the flexibility and applicability of the cleaning system.

[0058] In addition, in some optional embodiments, among the multiple cleaning brushes 22, some cleaning brushes 22 form a first cleaning group, and another part of the cleaning brushes 22 form a second cleaning group, and the number of cleaning brushes 22 in the first cleaning group is the same as the number of cleaning brushes 22 in the second cleaning group; the first cleaning group and the second cleaning group are arranged at intervals along the first direction on the conveying path, the first cleaning group is arranged close to the incoming material end, and the second cleaning group is arranged close to the outgoing material end.

[0059] The electrode 200 is transported by the conveyor 10 and sequentially passes through two sets of cleaning brushes 22, undergoing two cleaning operations. The cleaning brushes 22 in the first cleaning set are relatively hard, removing most of the hard particles that are relatively easy to remove. The cleaning brushes 22 in the second cleaning set are less hard, but maintain closer contact with the electrode 200, providing a detailed cleaning of any stubborn material remaining on the tab 210 after the first cleaning. This cleaning method provides a better cleaning effect than using a single cleaning brush 22, without damaging the structure of the electrode 200 itself.

[0060] The first cleaning group and the second cleaning group are both connected to the solvent injection device 30. The solvent injection device 30 can be divided into two groups, which are respectively connected to the first cleaning group and the second cleaning group. Each group of cleaning brushes 22 and solvent injection device 30 is synchronized and separated from the other group of cleaning brushes 22 and solvent injection device 30 for independent adjustment.

[0061] In addition, in some optional embodiments, the cleaning brushes 22 in the first cleaning group are steel brushes, and the cleaning brushes 22 in the second cleaning group are nylon brushes.

[0062] The cleaning brush 22 in the first cleaning group is a stainless steel wire brush made of HRB80 steel. The diameter of a single bristle is 0.01-0.05mm, the bristle density is 200 pieces / square millimeter, the rotation speed is 800-1200rpm, and the two adjacent rows of bristles are arranged crosswise. The steel brush has high strength. During installation, the top of the bristle only slightly contacts the surface of the tab 210, which is sufficient to contact the surface of the tab 210 where the material is solidified, to avoid damage to the pole piece 200 due to excessive contact pressure. The cleaning brush 22 in the second cleaning group is a conductive nylon brush with soft bristles and a rotation speed of 1500-2000rpm. It is used for fine cleaning of leaked materials that are more firmly bonded to the surface of the tab 210. When installed, the top of the bristles of the nylon brush fits tightly against the surface of the tab 210 to ensure that stubborn leaked materials on the tab 210 are thoroughly removed. The coordinated use of the two groups of cleaning brushes 22 not only improves the cleaning efficiency, but also protects the structure of the pole piece 200 itself.

[0063] In addition, in some optional embodiments, the dust hood 52 includes a first dust hood 52 and a second dust hood 52. The first dust hood 52 is arranged on the side of the first cleaning group close to the second cleaning group, and the second dust hood 52 is arranged on the side of the second cleaning group away from the first cleaning group. The first dust hood 52 and the second dust hood 52 are respectively connected to the dust removal duct 51.

[0064] In this embodiment, the coated electrode 200 is transported by the conveyor 10 and passes through the first cleaning group, the first dust cover 52, the second cleaning group and the second dust cover 52 in sequence. The electrode 200 is preliminarily cleaned by a steel brush. The leaked material on the surface of the tab 210 is softened by the solvent, and most of the leaked material with weak adhesion is removed by the steel brush. Then, a nylon brush is used to finely clean the remaining stubborn leaked material. Dust removal is performed after each cleaning. The first dust cover 52 is located after the first cleaning group and can collect waste generated during the steel brush cleaning process in a timely manner to prevent the waste from being scattered on the conveyor 10 or in the working environment. The second dust cover 52 is located after the second cleaning group to further collect fine dust that may be generated during the nylon brush cleaning process to ensure that the surface of the electrode 200 is thoroughly cleaned. The first dust cover 52 and the second dust cover 52 share the same dust removal duct 51. The dust removal duct 51 transports the collected waste and dust to designated processing equipment for centralized waste treatment. The entire cleaning process is efficient and orderly, ensuring the quality and production efficiency of the electrode 200.

[0065] The present invention provides a pole piece cleaning system comprising: a conveying device, a cleaning device, and a solvent spraying device. Multiple cleaning brushes in the cleaning device are positioned corresponding to the pole tabs on the pole piece. The relative movement between the tabs and the cleaning brushes generates friction, cleaning active material splashed from the tabs. A solvent activation device sprays solvent to dissolve the active material attached to the tabs before the cleaning brushes come into contact with the tabs, facilitating their removal by the cleaning brushes. This improves the cleaning effectiveness of the cleaning brushes while preventing damage to the tabs.

[0066] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0067] Although alternative embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they become aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including alternative embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0068] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity from another, and do not necessarily require or imply any actual relationship or order between these entities. Moreover, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that an article or terminal device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such article or terminal device. In the absence of further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the article or terminal device comprising the element.

[0069] The technical solutions provided by the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. At the same time, for those skilled in the art, according to the principles and implementation methods of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A cleaning system for a pole piece, wherein the pole piece includes a pole ear, characterized in that: The cleaning system includes: a conveying device, a cleaning device and a solvent spraying device; wherein, The conveying device is used to convey the pole piece along a conveying path in a first direction; The cleaning device is arranged on the conveying path, and the cleaning device includes a plurality of cleaning brushes, and the plurality of cleaning brushes are arranged at intervals along a second direction, and the second direction intersects with the first direction; Each of the cleaning brushes is connected to the solvent spraying device, the solvent spraying device is used to spray the solvent onto the tab, and the cleaning brush is used to clean the tab sprayed with the solvent.

2. The cleaning system according to claim 1, characterized in that The cleaning system also includes a leakage detection device, which is arranged on the conveying path. The conveying path has an incoming material end and a outgoing material end. The leakage detection device is arranged on the side of the cleaning device close to the incoming material end. The leakage detection device is electrically connected to the cleaning device and the solvent injection device. The leakage detection device is used to detect the leakage area on the tab and transmit the detection data to the cleaning device and the solvent injection device to control the start and stop of the cleaning device and the solvent injection device.

3. The cleaning system according to claim 2, characterized in that The cleaning system has a first working mode and a second working mode. When the leakage area is smaller than a preset threshold, the cleaning system enters the first working mode, and the cleaning device has a first working frequency; when the leakage area is greater than or equal to the preset threshold, the cleaning system enters the second working mode, and the cleaning device has a second working frequency; wherein, the first working frequency is smaller than the second working frequency.

4. The cleaning system according to claim 3, characterized in that The cleaning device further includes a rotating shaft, which is arranged on the conveying device. A plurality of cleaning brushes are spaced apart on the rotating shaft. The rotating shaft is used to drive the cleaning brushes to rotate. The rotation of the cleaning brushes is synchronized with the injection of the solvent injection device.

5. The cleaning system according to claim 1, wherein: The cleaning system further includes a negative pressure dust removal device, which is arranged on the conveying path, the conveying path having an incoming end and an outgoing end, and the negative pressure dust removal device is arranged on a side of the cleaning device close to the outgoing end; The negative pressure dust removal device includes a dust removal pipe and a dust removal hood. The dust removal hood is arranged above the transmission path. The dust removal hood is connected to the dust removal pipe. The dust removal pipe is used to provide negative pressure to the dust removal hood. The dust removal hood is used to absorb the leaked material on the pole ear and send the leaked material into the dust removal pipe.

6. The cleaning system according to claim 5, characterized in that A plurality of suction nozzles are provided on one side of the dust removal cover facing the conveying path. The suction nozzles correspond to the cleaning brushes one by one, and the suction nozzles are arranged obliquely to the conveying path.

7. The cleaning system according to claim 5, characterized in that Among the multiple cleaning brushes, some of the cleaning brushes constitute the first cleaning group, and another part of the cleaning brushes constitute the second cleaning group, and the number of the cleaning brushes in the first cleaning group is the same as the number of the cleaning brushes in the second cleaning group; the first cleaning group and the second cleaning group are arranged at intervals on the conveying path along the first direction, the first cleaning group is arranged close to the incoming material end, and the second cleaning group is arranged close to the outgoing material end.

8. The cleaning system according to claim 7, characterized in that The cleaning brushes in the first cleaning group are steel brushes, and the cleaning brushes in the second cleaning group are nylon brushes.

9. The cleaning system according to claim 7, characterized in that The dust removal hood includes a first dust removal hood and a second dust removal hood. The first dust removal hood is arranged on the side of the first cleaning group close to the second cleaning group, and the second dust removal hood is arranged on the side of the second cleaning group away from the first cleaning group. The first dust removal hood and the second dust removal hood are respectively connected to the dust removal duct.

10. The cleaning system according to claim 1, wherein: The solvent spraying device includes a liquid storage bottle and a conduit, one end of the conduit is connected to the liquid storage bottle, and the other end of the conduit is connected to the cleaning brush. The conduit is used to spray the solvent in the liquid storage bottle onto the tab.

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