Pole piece rolling device

Abstract

The utility model discloses a pole piece rolling device. The pole piece rolling device comprises a pressing roller and a plasma cleaning mechanism, the pressing roller is provided with a roller surface, and the pressing roller is rotatably arranged; the plasma cleaning mechanism comprises at least one plasma spraying piece, the plasma spraying pieces are located on the periphery of the pressing roller and face the roller face, and the plasma spraying pieces can spray plasma media to the roller face. According to the pole piece rolling device disclosed by the utility model, by controlling the spraying speed of the plasma medium, no roller surface damage can be realized, secondary pollution of cleaned gas to the surface of the compression roller can be avoided, online cleaning can be realized, the downtime of the pole piece rolling device can be reduced, the cleaning mode can ensure that the surface of the compression roller is basically not influenced, and the service life of the pole piece rolling device is prolonged. And in addition, the scraper can be applied to the cleaning range of the compression rollers such as sand blasting rollers, embossing rollers or needle rollers which cannot be used by traditional scrapers, and the application range is wider.

Description

Technical Field

[0001] The utility model relates to the field of lithium battery production equipment, in particular to a pole piece rolling device. Background Art

[0002] In the field of battery manufacturing technology, due to the stickiness of dust on the surface of the pole piece, dust easily adheres to the roller during rolling, causing secondary pollution to the pole piece. In order to avoid the impact of dust, existing equipment usually uses a metal scraper to scrape off the dust adhered to the roller surface. This method easily scratches the surface of the roller. When the coating on the surface of the roller becomes thinner, the hardness of the roller surface changes, shortening the service life of the roller. Utility Model Content

[0003] The embodiment of the utility model provides a pole piece rolling device, which solves the problem that a metal scraper affects the service life of a roller of the pole piece rolling device.

[0004] An embodiment of the utility model provides a pole piece rolling device, a pressure roller, and a plasma cleaning mechanism, wherein the pressure roller has a roller surface and is rotatable; the plasma cleaning mechanism includes at least one plasma injection component, which is located at the periphery of the pressure roller and is arranged toward the roller surface, and the plasma injection component can spray plasma medium toward the roller surface.

[0005] According to the pole piece rolling device of the embodiment of the utility model, the plasma medium is sprayed onto the roller surface through the plasma spraying part, and the small particle active substances on the roller surface are decomposed into gaseous compounds under the impact of the active ions in the plasma medium. By controlling the speed of the plasma medium spraying, it is possible to avoid damage to the roller surface, and the gas after cleaning will not cause secondary pollution to the roller surface, so that online cleaning can be achieved and the downtime of the pole piece rolling device can be reduced. This cleaning method can ensure that there is basically no impact on the roller surface, and the service life of the roller is increased. It can also be applied to the cleaning range of sandblasting rollers, embossing rollers or needle rollers that cannot be used by traditional scrapers, and has a wider range of applications.

[0006] According to the aforementioned embodiment of the utility model, the pole piece rolling device further comprises a screw moving assembly, the screw moving assembly is fixedly connected to the plasma cleaning mechanism, and the screw moving assembly is used to drive the plasma cleaning mechanism to move radially along the pressure roller.

[0007] According to any of the aforementioned embodiments of the utility model, the pole piece rolling device further comprises a linear module, the linear module is connected to the plasma cleaning mechanism, and the linear module is used to drive the plasma cleaning mechanism to move along the axial direction of the pressing roller.

[0008] According to any of the above embodiments of the utility model, the plasma cleaning mechanism further includes at least one plasma dust hood, the plasma dust hood is connected to the negative pressure generating device through a pipeline, the plasma dust hood includes a dust suction chamber with an opening, the opening is arranged toward the roller surface, the plasma injection component is penetrated through the plasma dust hood, and the outlet of the plasma injection component extends into the dust suction chamber. The plasma dust hood absorbs dust through high-speed airflow to prevent metal dust from falling on the pole piece or the roller surface to cause secondary pollution.

[0009] According to any of the above embodiments of the utility model, the plasma cleaning mechanism further comprises an air knife, the air outlet of the air knife extends into the dust suction chamber. The air knife has an air outlet, the air outlet corresponds to the roller surface of the pressure roller, the air knife is connected to an air duct, and the air duct is connected to a negative pressure device. The air knife cleans the dust attached to the brush roller, thereby improving the dust removal effect.

[0010] According to any of the above embodiments of the utility model, the pole piece rolling device further comprises a temperature sensor, the detection head of which is located in the dust suction chamber. The temperature sensor detects the temperature change of the roller surface in real time to avoid excessive local temperature during the cleaning process and damage to the roller.

[0011] According to any of the above embodiments of the utility model, the pole piece rolling device further comprises an ozone concentration detector, which is arranged on the outer peripheral side of the pressing roller. The ozone concentration detector detects the ozone concentration generated during the plasma gas generation process in real time to avoid excessive ozone concentration in the environment.

[0012] According to any of the aforementioned embodiments of the utility model, the pole piece rolling device further comprises a scraper assembly, the scraper assembly comprises a scraper body and a scraper dust cover, the scraper dust cover is connected to the negative pressure generating device through a pipeline, the scraper dust cover comprises a dust suction chamber with an opening, the opening is arranged toward the roller surface, and the scraper body is arranged in the scraper dust cover. The scraper body mainly scrapes off large particles of dust with poor plasma cleaning effect, while small particles of dust are cleaned by subsequent plasma cleaning mechanism, and the scraped dust is taken away from the scraper body and the pressure roller surface by the scraper dust cover, so as to achieve the removal of large particles of dust.

[0013] According to any of the above embodiments of the utility model, the scraper assembly further includes a scraper pressing cylinder, a scraper pushing cylinder and a threaded gap adjustment mechanism, and the scraper pressing cylinder, the scraper pushing cylinder and the threaded gap adjustment mechanism are used to drive the scraper body to move radially along the pressure roller. The scraper pushing cylinder pushes the scraper body to a specified position in front of the pressure roller, and the scraper pressing cylinder presses the scraper body onto the surface of the pressure roller, and the threaded gap adjustment mechanism adjusts the size of the gap between the scraper body and the pressure roller to reduce the loss of the scraper body and the pressure roller.

[0014] According to any of the above embodiments of the utility model, the pressing rollers are arranged in pairs, the pole piece passes between the paired pressing rollers and is squeezed by the pressing rollers, the outer periphery of each pressing roller is provided with the plasma cleaning mechanism, and the outer periphery of each pressing roller is provided with the scraper assembly. During operation, the pole piece is squeezed by the upper pressing roller and the lower pressing roller to achieve material extension. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0016] Figure 1 It is a three-dimensional schematic diagram of an embodiment of the pole piece rolling device of the utility model;

[0017] Figure 2 It is a plan view of an embodiment of the pole piece rolling device of the utility model;

[0018] Figure 3 It is a three-dimensional schematic diagram of a scraper assembly of an embodiment of the pole piece rolling device of the utility model.

[0019] Description of reference numerals:

[0020] 100-pole piece rolling device;

[0021] 110-pressing roller;

[0022] 120-plasma cleaning mechanism; 121-plasma spraying member; 122-plasma dust collecting hood; 123-air knife;

[0023] 130-screw moving assembly;

[0024] 140-Linear module;

[0025] 150-temperature sensor;

[0026] 160-Ozone concentration detector;

[0027] 170-pole piece;

[0028] 180-scraper assembly; 181-scraper body; 182-scraper dust cover; 183-scraper pressing cylinder; 184-scraper pushing cylinder; 185-threaded seam adjustment mechanism.

[0029] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with the embodiments with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0033] In this embodiment, the pole piece rolling device 100 includes a pressure roller 110 and a plasma cleaning mechanism 120, wherein the pressure roller 110 has a roller surface and is rotatable; the plasma cleaning mechanism 120 includes at least one plasma injection component 121, which is located on the periphery of the pressure roller 110 and is arranged toward the roller surface, and the plasma injection component 121 can spray plasma medium toward the roller surface.

[0034] In the above embodiment, the plasma medium is a high-frequency alternating electric field generated by air through a radio frequency power supply, which ionizes gas molecules and makes the gas highly ionizable and active. By spraying the plasma medium on the surface of the object, the active particles in the plasma medium, such as free radicals, ions and electrons, can destroy the chemical bonds in the pollutant molecules and decompose the macromolecules in the organic pollutants into gaseous or water-soluble compounds, thereby achieving a cleaning effect. In this embodiment, the plasma medium is sprayed onto the roller surface of the pressure roller 110 by the plasma spraying member 121. Under the impact of the active ions in the plasma medium, the small particle active substances on the surface of the pressure roller 110 are decomposed into gaseous compounds. By controlling the speed of the plasma medium spraying, no roller surface damage can be achieved. The gas after cleaning will not cause secondary pollution to the surface of the pressure roller 110, and online cleaning can be achieved to reduce the downtime of the pole piece rolling device 100. This cleaning method can ensure that there is basically no impact on the surface of the pressure roller 110, and the service life of the pressure roller 110 is increased. It can also be applied to the cleaning of sandblasting rollers, embossing rollers or needle rollers, and has a wider range of applications.

[0035] In some embodiments, the pole piece rolling device 100 further includes a screw moving assembly 130, which is fixedly connected to the plasma cleaning mechanism 120, and the screw moving assembly 130 is used to drive the plasma cleaning mechanism 120 to move along the radial direction of the pressure roller 110. The distance between the plasma cleaning mechanism 120 and the roller surface of the pressure roller 110 can be adjusted accordingly according to the different diameters of the pressure roller 110.

[0036] In some embodiments, the pole piece rolling device 100 further includes a linear module 140, which is connected to the plasma cleaning mechanism 120, and the linear module 140 is used to drive the plasma cleaning mechanism 120 to move along the axial direction of the pressure roller 110. The overall equipment cleaning range can cover the entire roller surface to avoid dust removal dead corners. The linear module 140 and the plasma cleaning mechanism 120 are connected by a connector, and in this embodiment, the connector is an L-shaped iron sheet.

[0037] In some embodiments, the plasma cleaning mechanism 120 further includes at least one plasma dust hood 122, which is connected to the negative pressure generating device through a pipeline, and the plasma dust hood 122 includes a dust suction chamber with an opening, the opening is arranged toward the roller surface, and the plasma injection component 121 is penetrated through the plasma dust hood 122, and the outlet of the plasma injection component 121 extends into the dust suction chamber. Under the impact of active ions in the plasma medium, the small particle active substances on the surface of the pressure roller 110 are decomposed into gaseous compounds, and the plasma dust hood 122 absorbs the dust through high-speed airflow to prevent metal dust from falling on the pole piece 170 or the roller surface to cause secondary pollution. The opening shape of the plasma dust hood 122 fits the shape of the roller surface, and there is a gap between the plasma dust hood 122 and the roller surface. After the dust is separated from the pressure roller 110, the high-speed airflow of the plasma dust hood 122 absorbs the dust to prevent metal dust from falling on the pole piece 170, causing the pole piece 170 to puncture the diaphragm due to lithium deposition, causing the battery to short-circuit and catch fire, or even battery explosion. The plasma injection component 121 sprays plasma medium into the plasma dust hood 122 through the opening of the plasma dust hood 122. The plasma dust hood 122 can prevent dust from scattering, so that there is no risk of metal dust flying in the air or falling on the roller surface during the entire cleaning process. One end of the L-shaped iron sheet of the connector is fixedly connected to the plasma dust hood 122, and the other end is fixedly connected to the linear module 140.

[0038] In the above embodiment, the plasma dust hood 122 is connected to the negative pressure generating device through a pipeline. The negative pressure generating device is the suction source of the plasma dust hood 122, and the negative pressure of the negative pressure generating device can be adjusted, so that the suction force in the plasma dust hood 122 can be controlled.

[0039] In some embodiments, the plasma cleaning mechanism 120 further includes an air knife 123, the air outlet of the air knife 123 extends into the dust suction chamber. The air knife 123 has an air outlet, which corresponds to the roller surface of the pressure roller 110. The air knife 123 is connected to an air duct, and the air duct is connected to a negative pressure device. The air knife 123 cleans the dust attached to the brush roller, thereby improving the dust removal effect. The plasma dust hood 122 and the air knife 123 are connected by a plurality of waist-shaped adjustment holes on the plasma dust hood 122 to achieve an adjustable distance between the plasma dust hood 122 and the surface of the pressure roller 110.

[0040] In some embodiments, the pole piece rolling device 100 further includes a temperature sensor 150, the detection head of which is located in the dust suction chamber. The temperature sensor 150 detects the surface temperature change of the pressure roller 110 in real time to avoid the local temperature being too high during the cleaning process and damaging the pressure roller 110. The temperature sensor 150 monitors the surface temperature of the pressure roller 110 in real time to avoid uneven surface temperature of the pressure roller 110. The temperature sensor 150 is connected to the signal of the driving device of the pressure roller 110.

[0041] In some embodiments, the pole piece rolling device 100 further includes an ozone concentration detector 160, which is disposed on the outer peripheral side of the pressure roller 110. The ozone concentration detector 160 detects the ozone concentration generated during the plasma gas generation process in real time to avoid excessive ozone concentration in the environment. When the ozone concentration is detected to be too high, the machine is shut down, and the negative pressure of the negative pressure generating device is increased, the vacuum adsorption is increased, and the danger caused by excessive ozone concentration in the local area is avoided. The ozone concentration detector 160 is connected to the negative pressure generating device and the pressure roller 110 drive device signal.

[0042] In some embodiments, the pole piece rolling device 100 further includes a scraper assembly 180, and the scraper assembly 180 includes a scraper body 181 and a scraper dust cover 182. The scraper dust cover 182 is connected to the negative pressure generating device through a pipeline, and the scraper dust cover 182 includes a dust collection chamber with an opening, and the opening is arranged toward the roller surface. The scraper body 181 is arranged in the scraper dust cover 182. The scraper body 181 mainly scrapes off large particles of dust with poor plasma cleaning effect, while small particles of dust are cleaned by the subsequent plasma cleaning mechanism 120. The scraped dust is taken away from the scraper body 181 and the surface of the pressure roller 110 by the scraper dust cover 182, so as to achieve the removal of large particles of dust. During the working process, the scraper body 181 is first used to remove large particles of dust with poor plasma cleaning effect on the surface of the pressure roller 110, while the small particles of dust are cleaned by the plasma cleaning mechanism 120.

[0043] In some embodiments, the scraper assembly 180 further includes a scraper pressing cylinder 183, a scraper pushing cylinder 184 and a threaded gap adjusting mechanism 185, which are used to drive the scraper body 181 to move radially along the pressure roller 110. The scraper pushing cylinder 184 pushes the scraper body 181 to a specified position in front of the pressure roller 110, and the scraper body 181 is pressed on the surface of the pressure roller 110 by the scraper pressing cylinder 183, and the size of the gap between the scraper body 181 and the pressure roller 110 is adjusted by the threaded gap adjusting mechanism 185 to reduce the loss of the scraper body 181 and the pressure roller 110. Since the scraper assembly 180 is only used to assist in cleaning large dust particles, it does not need to be too close to the roller surface. The distance between the scraper assembly 180 and the surface of the pressure roller 110 is adjusted by the scraper pressing cylinder 183, the scraper pushing cylinder 184 and the threaded gap adjusting mechanism 185, so as to remove large dust particles on the surface of the pressure roller 110, reduce the scraper and the roller surface loss of the pressure roller 110, and increase the service life of the scraper and the pressure roller 110. The scraper pressing cylinder 183 is used to fix the scraper body 181 and the scraper bracket, and the scraper pushing cylinder 184 is used to push the scraper body 181 and adjust the distance between the scraper body 181 and the roller surface of the pressure roller 110. The threaded gap adjusting mechanism 185 is used to fine-tune the distance between the scraper body 181 and the roller surface of the pressure roller 110.

[0044] In some embodiments, the pressing rollers 110 are arranged in pairs, and the pole piece 170 passes between the paired pressing rollers 110 and is squeezed by the pressing rollers 110. A plasma cleaning mechanism 120 is arranged on the periphery of each pressing roller 110, and a scraper assembly 180 is arranged on the periphery of each pressing roller 110. The pole piece rolling device 100 includes two symmetrically arranged upper and lower pressing rollers 110. When working, the pole piece 170 is squeezed by the upper pressing roller 110 and the lower pressing roller 110 to achieve material extension.

[0045] In some embodiments, the plasma cleaning mechanism 120 includes a plurality of plasma spraying members 121, and the plurality of plasma spraying members 121 are arranged along the axial direction of the pressure roller 110. The plasma spraying member 121 may be a spraying member such as a cylindrical or conical nozzle or a nozzle. In actual work, a plurality of plasma spraying members 121 are correspondingly arranged according to the axial length of the pressure roller 110 and the spraying range of the plasma spraying member 121, so that the roller surface of the pressure roller 110 can be cleaned more evenly.

[0046] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A pole piece rolling device, characterized in that: include: A pressure roller, wherein the pressure roller has a roller surface and is rotatably arranged; The plasma cleaning mechanism comprises at least one plasma spraying member, the plasma spraying member is located at the periphery of the pressure roller and is arranged toward the roller surface, and the plasma spraying member can spray plasma medium toward the roller surface.

2. The pole piece rolling device according to claim 1, characterized in that: The pole piece rolling device further comprises a screw moving assembly, the screw moving assembly is fixedly connected to the plasma cleaning mechanism, and the screw moving assembly is used to drive the plasma cleaning mechanism to move along the radial direction of the pressing roller.

3. The pole piece rolling device according to claim 1, characterized in that: The pole piece rolling device further comprises a linear module, which is connected to the plasma cleaning mechanism and is used to drive the plasma cleaning mechanism to move along the axial direction of the pressing roller.

4. The pole piece rolling device according to claim 1, characterized in that: The plasma cleaning mechanism also includes at least one plasma dust hood, which is connected to the negative pressure generating device through a pipeline, and the plasma dust hood includes a dust suction chamber with an opening, and the opening is arranged toward the roller surface. The plasma injection component is penetrated through the plasma dust hood, and the outlet of the plasma injection component extends into the dust suction chamber.

5. The pole piece rolling device according to claim 4, characterized in that: The plasma cleaning mechanism also includes an air knife, and the air outlet of the air knife extends into the dust suction chamber.

6. The pole piece rolling device according to claim 4, characterized in that: The pole piece rolling device also includes a temperature sensor, and a detection head of the temperature sensor is located in the dust suction chamber.

7. The pole piece rolling device according to claim 1, characterized in that: The pole piece rolling device further includes an ozone concentration detector, which is arranged on the outer peripheral side of the pressing roller.

8. The pole piece rolling device according to claim 1, characterized in that: The pole piece rolling device also includes a scraper assembly, which includes a scraper body and a scraper dust hood. The scraper dust hood is connected to the negative pressure generating device through a pipeline. The scraper dust hood includes a dust suction chamber with an opening, and the opening is arranged toward the roller surface. The scraper body is arranged in the scraper dust hood.

9. The pole piece rolling device according to claim 8, characterized in that: The scraper assembly also includes a scraper pressing cylinder, a scraper pushing cylinder and a threaded gap adjusting mechanism. The scraper pressing cylinder, the scraper pushing cylinder and the threaded gap adjusting mechanism are used to drive the scraper body to move along the radial direction of the pressure roller.

10. The pole piece rolling device according to claim 8, characterized in that: The pressure rollers are arranged in pairs, the pole pieces pass between the paired pressure rollers and are squeezed by the pressure rollers, the plasma cleaning mechanism is arranged on the periphery of each pressure roller, and the scraper assembly is arranged on the periphery of each pressure roller.

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