Electrode sheet flattening device and electrode sheet coating device

Abstract

An electrode sheet flattening device and an electrode sheet coating device. The electrode sheet flattening device comprises: a pressing roller (40) capable of being pressed on an electrode sheet (50) and capable of rotating along with the displacement of the electrode sheet; and a damping device (100) comprising a first transmission member (10) and a damping assembly (20), wherein the first transmission member can rotate along with the pressing roller, the damping assembly is arranged beside the first transmission member, and the damping assembly can apply resistance to the first transmission member. The electrode sheet flattening device can reduce the rotating speed of the pressing roller and adjust the component force in a direction perpendicular to the electrode sheet, thereby alleviating the problems of wrinkles and skewing of electrode sheets, and improving the yield rate of the electrode sheets.

Description

Pole flattening device and pole coating device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on November 24, 2023, with application number 202311580211.2, and invention name “Pole flattening device and pole coating device”, all contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of power batteries, and in particular to a pole piece flattening device and a pole piece coating device. Background Art

[0003] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the sustainable development of the automotive industry. For electric vehicles, battery technology is a key factor in their development.

[0004] In the battery structure, the electrode is an important component. Active material needs to be coated on the electrode. During the coating process, the electrode is prone to skewness, wrinkles, etc., which can easily affect the yield of the electrode.

[0005] Summary of the Invention

[0006] In view of the above problems, the present application provides a pole piece flattening device and a pole piece coating device to alleviate the problem of pole pieces being easily skewed and wrinkled.

[0007] In a first aspect, an embodiment of the present application provides a pole piece flattening device, comprising:

[0008] A pressure roller, which can press on the pole piece and rotate with the displacement of the pole piece;

[0009] A damping device comprising a first transmission member and a damping assembly;

[0010] The first transmission member can rotate along with the pressure roller; the damping component is arranged beside the first transmission member, and the damping component can apply resistance to the first transmission member.

[0011] In the technical solution of this embodiment, a first transmission member capable of rotating with the pressure roller is provided, and a damping component capable of providing resistance to the first transmission member is provided to reduce the rotation speed of the pressure roller, so that the pressure roller can apply a corrective force opposite to the direction of movement of the pole piece to the pole piece, and stretch the pole piece through the component of the corrective force in the direction perpendicular to the pole piece to alleviate the problem of pole piece wrinkles. At the same time, the component of the corrective force can also drive the pole piece to move to alleviate the problem of pole piece skew, so as to improve the yield of the pole piece.

[0012] In some embodiments, the damping assembly includes at least two different states to apply different resistances to the first transmission member.

[0013] In the technical solution of this embodiment, the damping component includes at least two different states, and different resistances are applied to the first transmission member through different states, so that the first transmission member can provide different resistances to the pressure roller, and have different deceleration effects on the pole piece through the pressure roller, so that the damping device can adapt to different skew conditions and different wrinkle conditions of the pole piece, thereby improving the correction ability of the damping device.

[0014] In some embodiments, the material of the first transmission member includes a magnetic conductive material, and the damping assembly is capable of forming a magnetic field around the first transmission member;

[0015] The first transmission member rotates in the magnetic field to form a closed current inside the first transmission member.

[0016] In the technical solution of this embodiment, the first transmission member is made of magnetic conductive material, and the damping assembly provides resistance to the first transmission member through a magnetic field. Compared with structures such as brake pads that directly contact the workpiece to provide resistance, the use of a magnetic field to provide resistance can provide a buffer for the deceleration of the first transmission member, reduce the sudden increase in structural load and sudden change in pole piece force caused by a sudden drop in direct contact speed, thereby improving the service life and stability of the structure in the damping device, and at the same time reducing the possible negative impact on the pole piece.

[0017] In some embodiments, the first transmission element comprises an annular component, so that the rotation of the first transmission element within the magnetic field can form an annular closed current inside the first transmission element.

[0018] In the technical solution of this embodiment, the first transmission member is an annular member, so that when the first transmission member moves in the magnetic field, it is easier for the inside of the first transmission member to form a stable closed current along the shape of the annular member, thereby enabling the magnetic field to provide resistance to the first transmission member more stably.

[0019] In some embodiments, the damping assembly includes a first magnet and a second magnet disposed on opposite sides of the first transmission member, and the first magnet is movable relative to the second magnet.

[0020] The technical solution of this embodiment provides some specific structures of the damping assembly, so that the damping assembly can provide a magnetic field around the first transmission member, and enable the first transmission member to form an induced current during movement, so that the damping assembly can provide resistance to the first transmission member more stably; enable the first magnet to move relative to the second magnet, so that the damping assembly can provide magnetic fields with different magnetic field intensities, thereby providing different resistances to the first transmission member, and enable the pressure roller to have different speeds to adapt to different skew conditions and different wrinkle conditions of the pole pieces.

[0021] In some embodiments, the first magnet is rotatable relative to the second magnet, and the first magnet has different magnetic poles in the circumferential direction of its rotation axis to change the projected areas of different magnetic poles of the first magnet on different magnetic poles of the second magnet.

[0022] In the technical solution of this embodiment, the first magnet is enabled to rotate relative to the second magnet to change the projection area of ​​the magnetic pole of the first magnet on the different magnetic poles of the second magnet, thereby changing the strength of the magnetic field formed between the first magnet and the second magnet, and thereby changing the resistance provided by the magnetic field to the first transmission member, thereby achieving the effect of providing different resistances to the first transmission member through the damping component.

[0023] In some embodiments, the first magnet includes a first portion and a second portion having different magnetic properties, the second magnet includes a third portion and a fourth portion having different magnetic properties, and the third portion has a different magnetic property from the first portion;

[0024] Along the circumference of the rotation axis of the first magnet, the first portion and the second portion are arranged in sequence, and the third portion and the fourth portion are arranged in sequence.

[0025] The technical solution of this embodiment provides some specific structures of the first magnet and the second magnet, so that the first magnet includes a first part and a second part arranged in sequence along its circumference, and the second magnet includes a third part and a fourth part arranged in sequence along the circumference of the first magnet, so that the rotation of the first magnet relative to the second magnet can change the projection area of ​​the first part on the third part, thereby changing the strength of the magnetic field formed between the first magnet and the second magnet, and thereby changing the resistance provided by the magnetic field to the first transmission member, thereby achieving the effect of providing different resistances to the first transmission member through the damping component.

[0026] In some embodiments, the damping device further includes a second transmission member transmission-connected to the first transmission member, and the second transmission member transmission-connected to the pressure roller.

[0027] In the technical solution of this embodiment, the first transmission member is connected to the pressure roller through the second transmission member to facilitate the layout of the structure, thereby alleviating the problem of narrow installation space caused by the first transmission member being directly connected to the pressure roller.

[0028] In some embodiments, the second transmission member is in contact with the pressure roller and can rotate along with the pressure roller through friction.

[0029] In the technical solution of this embodiment, the second transmission member is made to contact the pressure roller so that the pressure roller drives the second transmission member to rotate through friction. Compared with gear transmission and other methods, the use of friction transmission can provide buffering for the damping device and the pressure roller, so as to reduce the negative impact that may be caused by the sudden increase in load due to the sudden change in resistance to the first transmission member.

[0030] In some embodiments, the second transmission member includes a base and a damping component arranged around the base, the base is connected to the first transmission member, and the damping component is in contact with the pressure roller and can rotate with the pressure roller through friction.

[0031] The technical solution of this embodiment provides some specific structures of the second transmission member, so that the second transmission member is connected to the first transmission member through the base, and is connected to the pressure roller through the damping member; because the damping member is connected to the pressure roller through friction, this setting is likely to lead to a shorter life of the damping member. The second transmission member includes a base and a damping member so that the damping member can be replaced separately, so as to improve the overall life of the damping device.

[0032] In some embodiments, the material of the damping member includes at least one of a rubber-based material, a carbon fiber material, a resin-based material, or a semi-metallic material.

[0033] The technical solution of this embodiment provides some specific materials for the damping components so that there can be greater friction between the damping components and the pressure roller, thereby enabling the damping components to rotate synchronously with the pressure roller better and reducing the sliding friction between the damping components and the pressure roller.

[0034] In some embodiments, in the axial direction of the pressure roller, a size range of the contact surface between the second transmission member and the pressure roller is 3 mm to 20 mm.

[0035] The technical solution of this embodiment provides a width range of the second transmission member so that the second transmission member can better provide resistance to the pressure roller, while also reducing the space requirement of the second transmission member, thereby reducing the overall volume and weight of the damping device.

[0036] In some embodiments, the damping device further includes a housing, the second transmission member is disposed outside the housing, and the first transmission member and the damping structure are accommodated in the housing.

[0037] In the technical solution of this embodiment, the damping device also includes a shell, and the shell accommodates the first transmission member and the damping structure to play a role in supporting the first transmission member and the damping structure; at the same time, the second transmission member is outside the shell to facilitate the transmission connection of the second transmission member to the pressure roller.

[0038] In some embodiments, the pole piece flattening device includes at least one pressing roller, and at least one damping device can be provided on the circumference of any pressing roller.

[0039] In the technical solution of this embodiment, the damping device can be arranged on the side of any pressure roller as needed, or can be arranged on the sides of several pressure rollers respectively; at the same time, only one damping device can be arranged on the side of each pressure roller, or multiple damping devices can be arranged to adapt to the different needs of different working conditions.

[0040] In some embodiments, the damping device further includes a bracket, which is detachably arranged beside any pressure roller.

[0041] In the technical solution of this embodiment, the damping device can be detachably arranged on the side of any pressure roller through a bracket, so that the staff can change the position of the damping device according to the actual working conditions, thereby improving the flexibility of the use of the damping device and reducing costs.

[0042] In a second aspect, some embodiments of the present application further provide a pole piece coating device, comprising:

[0043] A pressure roller, which can press on the pole piece and rotate with the displacement of the pole piece;

[0044] A damping device comprising a first transmission member and a damping assembly;

[0045] The first transmission member can rotate along with the pressure roller; the damping component is arranged beside the first transmission member, and the damping component can apply resistance to the first transmission member.

[0046] In the technical solution of this embodiment, a first transmission member capable of rotating with the pressure roller is provided, and a damping component capable of providing resistance to the first transmission member is provided to reduce the rotation speed of the pressure roller, so that the pressure roller can apply a corrective force opposite to the direction of movement of the pole piece to the pole piece, and stretch the pole piece through the component of the corrective force in the direction perpendicular to the pole piece to alleviate the problem of pole piece wrinkles. At the same time, the component of the corrective force can also drive the pole piece to move to alleviate the problem of pole piece skew, so as to improve the yield of the pole piece.

[0047] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0049] FIG1 is a schematic top view of a pole piece flattening device provided in some embodiments of the present application.

[0050] FIG2 is a partial enlarged schematic diagram of point A in FIG1 .

[0051] FIG3 is a schematic cross-sectional view of a damping device provided in some embodiments of the present application.

[0052] FIG4 is a perspective schematic diagram of a bracket in a damping device provided in some embodiments of the present application.

[0053] The meanings of the marks in the figure are:

[0054] 100. Damping device;

[0055] 10. First transmission member;

[0056] 20. Damping assembly; 21. First magnet; 211. First portion; 212. Second portion; 22. Second magnet; 221. Third portion; 222. Fourth portion; 23. Housing; 24. Bracket;

[0057] 30. Second transmission member; 31. Base; 32. Damping member;

[0058] 200. Pole piece flattening device;

[0059] 40. Pressing roller;

[0060] 50. Pole; 51. Blank area; 52. Coating area.

[0061] Modes for Carrying Out the Invention

[0062] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0063] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0064] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0065] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0066] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0067] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0068] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0069] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0070] Currently, market developments indicate that power batteries are becoming increasingly widely used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As power battery applications continue to expand, market demand is also growing.

[0071] In the structure of the battery, the electrode assembly is an important component, and the electrode assembly is usually formed by winding the pole piece and the diaphragm. Among them, the pole piece needs to be coated with active material and form a coating area, and a blank area where the active material is not coated needs to be left. During the pole piece coating process, it is usually necessary to set up a flattening device, and the flattening device's pressure roller is used to flatten the active material coated on the pole piece and the blank area. The pressure roller is usually a passive roller and moves synchronously with the movement of the pole piece. The pressure roller is used to make the active material evenly distributed and to reduce wrinkles in the blank area.

[0072] In current electrode coating and flattening devices, as the electrode moves and operation time increases, the pressure roller is prone to gradually shifting and tilting under the action of the electrode, and the electrode is also prone to tilting. This can easily lead to uneven pressure applied by the pressure roller on the electrode, resulting in uneven distribution of active material on the electrode and uneven electrode surface, and can also negatively impact the flattening of wrinkles in the blank area.

[0073] To alleviate the problems of roller displacement and pole piece skew, the roller can be configured as a floating roller. For example, a radial spherical bearing and a floating portion are incorporated into the roller. The radial spherical bearing has a spherical outer surface, and the floating portion can swing within a certain range around the radial spherical bearing. This allows uneven pole pieces to rest against the roller, reducing the occurrence of pole piece skew and the overall roller skew. However, this structure has poor flattening capabilities for the pole pieces, making it difficult to evenly distribute the active material on the pole pieces and to flatten wrinkles in the blank areas.

[0074] To alleviate the problems of roller displacement, skew, and pole piece skew, hydraulic cylinders, air cylinders, connecting shafts, and other structures can also be set on the roller to adjust the position of the roller and reduce the displacement and skew of the roller. However, this structure requires a lot of space and is not easy to install, disassemble, or replace, resulting in high cost of use. In addition, when flattening wrinkles, the pressure of this structure on the pole piece is difficult to control. If the applied pressure is too high, it is easy to reduce the tolerance of the pole piece current collector, pinch the blank area of ​​the pole piece, which is not conducive to eliminating wrinkles and is easy to cause belt breakage during other subsequent operations of the pole piece. If the applied pressure is too low, the flattening effect of the wrinkles in the blank area is poor.

[0075] Based on the above considerations, in order to alleviate the problems of pressure roller displacement, skewness and pole piece skewness, some embodiments of the present application provide a damping device beside the pressure roller, so that the first transmission member can rotate with the pressure roller, and the damping assembly can apply resistance to the first transmission frame, so as to apply resistance to the pressure roller through the first transmission member.

[0076] Under the action of the damping device, sliding friction can be formed between the pressure roller and the pole piece, so that the pressure roller can apply a corrective force to the pole piece in the opposite direction of the pole piece's movement. The component of this corrective force in the direction perpendicular to the pole piece can stretch the pole piece to alleviate the problem of pole piece wrinkles. At the same time, the other component of this corrective force can drive the pole piece to move to alleviate the problem of pole piece skew. When the pole piece is skewed, the pressure roller is displaced or skewed, the damping device can be activated to correct the position of the pole piece and flatten the pole piece, thereby improving the yield rate of the pole piece and improving production efficiency.

[0077] The damping device disclosed in the present application can be used in various devices with the function of flattening pole pieces, for example, it can be applied to a pole piece coating device, a pole piece flattening device or other devices.

[0078] For the convenience of description, the following embodiments are described by taking an example of a damping device 100 according to an embodiment of the present application being applied to a pole piece flattening device 200.

[0079] Referring to Figure 1, Figure 1 is a top view schematic diagram of a pole piece flattening device 200 provided in some embodiments of the present application. The pole piece flattening device 200 is used to flatten the active material on the current collector of the pole piece 50. The current collector can be a sheet structure of copper foil, aluminum foil or other materials; the active material can be lithium manganese oxide, lithium cobalt oxide, lithium nickel cobalt manganese oxide, graphite or other materials; the pole piece flattening device 200 is also used to flatten the pole piece 50 to reduce wrinkles on the pole piece 50; depending on the type of active material, the pole piece 50 can be a positive pole piece or a negative pole piece. The pole piece flattening device 200 may include a pressing roller 40, which is used to flatten the active material coated on the pole piece 50 and flatten the blank area 51. The pressing roller 40 is a passive roller and is a synchronous roller as the pole piece 50 moves. The pressing roller 40 is used to ensure that the active material can be evenly and evenly distributed, and is also used to reduce wrinkles in the blank area 51.

[0080] In the first aspect, some embodiments of the present application provide a pole piece flattening device 200, referring to Figures 1 and 2, wherein Figure 1 is a top view schematic diagram of the pole piece flattening device 200 provided by some embodiments of the present application, and Figure 2 is a partial enlarged schematic diagram of point A in Figure 1.

[0081] Some embodiments of the present application provide a pole piece flattening device 200, comprising a damping device 100 and a pressure roller 40; the pressure roller 40 can press on the pole piece 50, and the pressure roller 40 can rotate with the displacement of the pole piece 50; the damping device 100 is applied to the pressure roller 40, and the damping device 100 includes a first transmission member 10 and a damping assembly 20; wherein, the first transmission member 10 can rotate with the pressure roller 40; the damping assembly 20 is arranged beside the first transmission member 10, and the damping assembly 20 can apply resistance to the first transmission member 10.

[0082] The pressure roller 40 refers to the structure used to roll the electrode 50 in the electrode flattening device 200. The pressure roller 40 is used to flatten the active material in the coating area 52 of the electrode 50 to improve the uniformity of the active material and the flatness of the electrode 50. The pressure roller 40 is also used to flatten the wrinkles in the blank area 51 of the electrode 50 to improve the flatness of the electrode 50. The material of the pressure roller 40 can be plastic, metal or other materials.

[0083] The pressure roller 40 can rotate with the displacement of the pole piece 50 , that is, the pressure roller 40 is a passive roller, and the movement of the pole piece 50 can drive the pressure roller 40 to rotate accordingly. At this time, there is rolling friction between the pressure roller 40 and the pole piece 50 .

[0084] The first transmission member 10 refers to a structure in the damping device 100 that is transmission-connected to the pressure roller 40 . The first transmission member 10 may be made of plastic, metal, or other materials.

[0085] The first transmission member 10 can be directly connected to the pressure roller 40; for example, the first transmission member 10 can be directly in contact with the pressure roller 40, so that the rotation of the pressure roller 40 can drive the first transmission member 10 to rotate through friction. At this time, the first transmission member 10 can be a friction wheel or other wheel-like structure; for another example, the first transmission member 10 can also be a gear. At this time, a corresponding gear can be set on the pressure roller 40, so that the pressure roller 40 can drive the first transmission member 10 to rotate.

[0086] The first transmission member 10 can also be indirectly connected to the pressure roller 40; for example, an idler wheel can be set between the first transmission member 10 and the pressure roller 40. At this time, according to the structure of the first transmission member 10, the idler wheel can be a friction wheel, a gear or other structure; for another example, the first transmission member 10 can also be a pulley, a sprocket or other structure. At this time, the pressure roller 40 can drive the first transmission member 10 to rotate through a synchronous belt, a chain or other structure.

[0087] The damping device 100 refers to a structure in the damping device 100 that can provide resistance to the first transmission member 10. The damping device 100 can provide resistance by directly contacting the first transmission member 10. For example, the damping device 100 may include a telescopic cylinder and a brake pad. The telescopic cylinder can make the brake pad press against the first transmission member 10 to provide resistance; the resistance device can also provide resistance to the first transmission member 10 in an indirect manner. For example, the damping device 100 may include an electromagnetic generating structure, which can generate electromagnetic force to provide resistance to the first transmission member 10.

[0088] The damping assembly 20 can provide resistance to the first transmission member 10 to reduce the rotational speed of the first transmission member 10. The reduced rotational speed of the first transmission member 10 can drive the rotational speed of the pressure roller 40 to simultaneously reduce. Because the pressure roller 40 rotates with the movement of the pole piece 50, rolling friction is generated between the pressure roller 40 and the pole piece 50. When the rotational speed of the pressure roller 40 decreases, the pressure roller 40 slides relative to the pole piece 50. At this time, sliding friction is also generated between the pressure roller 40 and the pole piece 50. This sliding friction can apply a force to the pole piece 50 opposite to the direction of movement of the pole piece 50. This force is called a corrective force.

[0089] When the pressure roller 40 is displaced or skewed, or the pole piece 50 is skewed or wrinkled, an angle will be formed between the force of the pressure roller 40 on the pole piece 50 and the moving direction of the pole piece 50. At this time, the damping device 100 can be started and resistance can be provided to the rotation of the pressure roller 40, so that the pressure roller 40 can apply a corrective force to the pole piece 50. The component of the corrective force perpendicular to the direction of the pole piece 50 can stretch the pole piece 50 to relieve the wrinkles of the pole piece 50 and play a role in flattening the wrinkles of the pole piece 50. The other component of the corrective force can drive the pole piece 50 to move to relieve the problem of displacement of the pole piece 50 and play a role in correcting the position of the pole piece 50.

[0090] At the same time, the reduced rotation speed of the pressure roller 40 can also reduce the travel speed of the pole piece 50 , so as to correct the position of the pole piece 50 and alleviate the skewness of the pole piece 50 .

[0091] During the coating process, the pole piece 50 is negatively affected by the difference in horizontality between the pressure roller 40 and the correction difference of the pole piece 50, so the pole piece 50 is prone to tilt to one side and wrinkles. Accordingly, this embodiment provides a first transmission member 10 that can rotate with the pressure roller 40, and provides a damping component 20 that can provide resistance to the first transmission member 10 to reduce the rotation speed of the pressure roller 40, so that the pressure roller 40 can apply a corrective force opposite to the movement direction of the pole piece 50 to the pole piece 50, and stretch the pole piece 50 through the component of the corrective force in the direction perpendicular to the pole piece 50 to alleviate the problem of wrinkles in the pole piece 50. At the same time, the component of the corrective force can also drive the pole piece 50 to move, so as to alleviate the problem of skewness of the pole piece 50, thereby improving the yield of the pole piece 50; at the same time, the provision of the first transmission member 10 can also reduce the occurrence of situations such as shortened life of the pressure roller 40 and difficulty in installation caused by direct contact of the damping component 20 with the pressure roller 40.

[0092] In some embodiments, the damping assembly 20 includes at least two different states to apply different resistances to the first transmission member 10 .

[0093] The different states of the damping assembly 20 may refer to the relative position of the damping assembly 20 and the first transmission member 10, or may refer to the different states of the damping assembly 20 itself. The damping assembly 20 may have two different states, or three or more different states; when the damping assembly 20 is in different states, the damping assembly 20 can provide different resistances to the first transmission member 10.

[0094] According to the different structures of the damping assembly 20, the damping assembly 20 can change the magnitude of the resistance in different ways. In some embodiments, the damping assembly 20 includes a telescopic cylinder and a brake pad. The telescopic cylinder can make the brake pad press against the first transmission member 10 to provide resistance. At this time, the different states of the damping assembly 20 refer to the different extension lengths of the telescopic cylinder. The damping assembly 20 can make the telescopic cylinder have different lengths in different states, so as to adjust the pressure of the brake pad against the first transmission member 10 by controlling the extension length, thereby adjusting the magnitude of the friction between the brake pad and the first transmission member 10, thereby achieving the effect of adjusting the magnitude of the resistance. In other embodiments, the damping device 100 includes an electromagnetic generating structure. The electromagnetic generating structure can generate electromagnetic force to provide resistance to the first transmission member 10. At this time, the different states of the damping component 20 refer to the different sizes of current in the electromagnetic generating structure. The damping component 20 has different currents in different states to change the size of the electromagnetic force applied to the first transmission member 10, thereby achieving the effect of adjusting the size of resistance; in some other embodiments, the damping device 100 includes an electromagnetic generating structure, which can generate electromagnetic force to provide resistance to the first transmission member 10. At this time, the different states of the damping component 20 refer to the distance between the electromagnetic generating structure and the first transmission member 10. The distance between the damping component 20 and the first transmission member 10 is different in different states to change the size of the electromagnetic force applied to the first transmission member 10; it can be understood that according to the different structures of the damping component 20, the way in which the damping component 20 adjusts the size of resistance can also be other ways, not limited to the above-mentioned way.

[0095] The damping component 20 can apply resistance of different sizes to the first transmission member 10, so that the first transmission member 10 can have different accelerations and rotation speeds, and thus the pressure roller 40 can have different accelerations and rotation speeds; because the movement of the pole piece 50 drives the rotation of the pressure roller 40, the different rotation speed reductions of the pressure roller 40 have different effects on the travel speed of the pole piece 50, so that the pressure roller 40 can provide different deceleration effects according to the different degrees of skewness and different degrees of wrinkling of the pole piece 50, so as to better achieve the correction and flattening effects.

[0096] In this embodiment, the damping assembly 20 is enabled to apply resistances of different sizes to the first transmission member 10, so that the first transmission member 10 can provide resistances of different sizes to the pressure roller 40, and achieve different deceleration effects on the pole piece 50 through the pressure roller 40, so that the damping device 100 can adapt to different skew conditions and different wrinkle conditions of the pole piece 50, thereby improving the correction ability of the damping device 100.

[0097] According to some embodiments of the present application, refer to Figures 2 and 3, where Figure 2 is a top view schematic diagram of the pressure roller 40 and the damping device 100 next to it provided in some embodiments of the present application, and Figure 3 is a cross-sectional schematic diagram of the damping device 100 provided in some embodiments of the present application.

[0098] In some embodiments of the present application, the material of the first transmission member 10 includes magnetic conductive material, and the damping assembly 20 can form an uneven magnetic field around the first transmission member 10; the rotation of the first transmission member 10 in the magnetic field can form a closed current inside the first transmission member 10.

[0099] The material of the first transmission member 10 can be iron, steel or other pure metals. The material of the first transmission member 10 can also be iron-silicon alloy, iron-aluminum alloy or other alloys. The material of the first transmission member 10 can also be other materials that are easily magnetized under the action of a magnetic field.

[0100] The damping assembly 20 can generate a magnetic field and, through magnetic force, provide resistance to the rotation of the first transmission member 10. In some embodiments, the damping assembly 20 may include a permanent magnet, such as ferrite, alnico, or other permanent magnetic material. In this case, the resistance exerted by the damping assembly 20 on the first transmission member 10 can be varied by changing the distance between the permanent magnet and the first transmission member 10. In other embodiments, the damping assembly 20 may also include an electromagnet. In this case, the resistance exerted by the damping assembly 20 on the first transmission member 10 can be varied by changing the current within the electromagnet.

[0101] An uneven magnetic field means that the magnetic field strength at different positions around the first transmission member 10 is different. For example, the damping component 20 can form two or more magnetic fields with different magnetic field strengths around the first transmission member 10; for another example, the damping component 20 can also form a magnetic field only in a part of the space around the first transmission member 10, and the magnetic field strength in other spaces around the first transmission member 10 will be low or zero. This setting can also form an uneven magnetic field around the first transmission member 10; it can be understood that the uneven magnetic field can also be formed by other means, not limited to the above two methods.

[0102] The rotation of the first transmission member 10 in the magnetic field can form a closed current inside the first transmission member 10, and the current is formed by electromagnetic induction; accordingly, the first transmission member 10 can be a closed ring structure, a disc structure, or other structures that can form a closed current.

[0103] Because the damping assembly 20 can form a magnetic field around the first transmission member 10, and the first transmission member 10 can rotate with the rotation of the pressure roller 40, the first transmission member 10 can rotate in the magnetic field and can generate an induced current inside the first transmission member 10; and because the current in the first transmission member 10 is formed by induction, and the magnetic field formed by the induced current will always hinder the change of the magnetic flux causing the induced current, so as the first transmission member 10 rotates in the uneven magnetic field, the first transmission member 10 will always be subject to resistance from the magnetic field to hinder the change of its internal current, thereby providing resistance to the rotation of the first transmission member 10.

[0104] If the first transmission member 10 is directly contacted and resistance is provided through structures such as brake pads, when the resistance changes, the speed of the first transmission member 10 will change in a relatively short period of time. The force generated in this process will be borne by the first transmission member 10, the pressure roller 40 and other related structures, resulting in a sudden increase in the structural load, which may easily cause deformation, cracks or even breakage of the structure, and may easily lead to a reduction in the life of the structure. Compared with the structure that directly contacts the first transmission member 10 through structures such as brake pads, using the magnetic field to provide resistance can make the speed change of the first transmission member 10 smoother, thereby reducing the impact that the change in resistance may cause on the first transmission member 10, the pressure roller 40 or other structures, thereby protecting the structure and improving the life of the structure.

[0105] In this embodiment, the first transmission member 10 is made of magnetic conductive material, and the damping assembly 20 provides resistance to the first transmission member 10 through a magnetic field. Compared with structures such as brake pads that directly contact the workpiece to provide resistance, the use of a magnetic field to provide resistance can provide a buffer for the deceleration of the first transmission member 10, reduce the sudden increase in structural load and sudden force on the pole piece 50 that may be caused by a sudden decrease in direct contact speed, thereby improving the service life and stability of the structure in the damping device 100, and at the same time reducing the possible negative impact on the pole piece 50.

[0106] 3 , in some embodiments, the first transmission member 10 includes an annular component, so that a circular closed current can be formed inside the first transmission member 10 when the first transmission member 10 rotates within a magnetic field.

[0107] The first transmission member 10 is an annular member so that when the first transmission member 10 moves in the magnetic field, it can more easily form a stable closed current along the shape of the annular member, thereby enabling the first transmission member 10 to be continuously and relatively stably subjected to the resistance of the magnetic field in the magnetic field.

[0108] In this embodiment, the first transmission member 10 is an annular member, so that when the first transmission member 10 moves in the magnetic field, a stable closed current is more easily formed inside the first transmission member 10, so that the magnetic field can provide resistance for the first transmission member 10 more stably.

[0109] 3 , in some embodiments, the damping assembly 20 includes a first magnet 21 and a second magnet 22 disposed on opposite sides of the first transmission member 10 , and the first magnet 21 is movable relative to the second magnet 22 .

[0110] The first magnet 21 refers to a structure in the damping assembly 20 that can generate a magnetic field. The first magnet 21 may include a permanent magnet, and its material may include ferrite, aluminum nickel cobalt alloy or other permanent magnetic materials; the first magnet 21 may also include an electromagnet; the shape of the first magnet 21 may be ring-shaped, or bar-shaped, block-shaped or other shapes.

[0111] Similar to the first magnet 21, the second magnet 22 refers to a structure in the damping assembly 20 that can generate a magnetic field. The second magnet 22 may include a permanent magnet, and its material may include ferrite, aluminum nickel cobalt alloy or other permanent magnetic materials; the second magnet 22 may also include an electromagnet; the shape of the second magnet 22 may be ring-shaped, or bar-shaped, block-shaped or other shapes.

[0112] The first magnet 21 and the second magnet 22 are respectively disposed on opposite sides of the first transmission member 10 to form a magnetic field between the first magnet 21 and the second magnet 22 and enable the first transmission member 10 to move in the magnetic field.

[0113] The first magnet 21 and the second magnet 22 can have a variety of different relative positions. In some embodiments, the first magnet 21 can be arranged relative to the second magnet 22, and the projections of the first magnet 21 and the second magnet 22 on the first transmission member 10 will not completely cover the first transmission member 10, that is, the magnetic field formed between the first magnet 21 and the second magnet 22 cannot completely cover the first transmission member 10. At this time, part of the first transmission member 10 will be subject to resistance from the magnetic field when entering or leaving the magnetic field; in other embodiments, the first magnet 21 can be arranged relative to the second magnet 22, and the projections of the first magnet 21 and the second magnet 22 on the first transmission member 10 will completely cover the first transmission member 10. The moving member 10 is provided with a first magnet 21 and a second magnet 22, and the south pole (S pole) of the first magnet 21 and the south pole (S pole) of the second magnet 22 are partially staggered, or the north pole (N pole) of the first magnet 21 and the north pole (N pole) of the second magnet 22 are partially staggered. At this time, the first magnet 21 and the second magnet 22 can also form different magnetic fields around the first transmission member 10; in some other embodiments, the first magnet 21 and the second magnet 22 can be staggered. At this time, part of the first transmission member 10 will be subject to resistance from the corresponding magnetic field when entering or leaving the magnetic field formed by the first magnet 21, or entering or leaving the magnetic field formed by the second magnet 22.

[0114] The first magnet 21 can move relative to the second magnet 22, wherein the first magnet 21 can have multiple movable directions relative to the second magnet 22. In some embodiments, the first magnet 21 can move in a direction closer to or farther away from the second magnet 22. As the distance between the first magnet 21 and the second magnet 22 changes, the magnetic field strength near the first transmission member 10 also changes, and the resistance applied by the magnetic field to the first transmission member 10 also varies. In other embodiments, the first magnet 21 can also move relative to the second magnet 22 in other directions to change the projected area of ​​the first magnet 21 on the second magnet 22, that is, to change the area of ​​the overlapping portion between the first magnet 21 and the second magnet 22. This setting can also change the strength of the magnetic field, thereby changing the resistance applied by the magnetic field to the first transmission member 10.

[0115] This embodiment provides some specific structures of the damping assembly 20, so that the damping assembly 20 can provide a magnetic field around the first transmission member 10, and enable the first transmission member 10 to form an induced current during movement, so that the damping assembly 20 can provide resistance to the first transmission member 10 more stably; enable the first magnet 21 to move relative to the second magnet 22, so that the damping assembly 20 can provide magnetic fields with different magnetic field intensities, thereby providing different resistances to the first transmission member 10, and enable the pressure roller 40 to have different speeds to adapt to different skew conditions and different wrinkle conditions of the pole piece 50.

[0116] 3 , in some embodiments, the first magnet 21 is rotatable relative to the second magnet 22 , and the first magnet 21 has different magnetic poles circumferentially of its axis of rotation to change the projected areas of the different magnetic poles of the first magnet 21 on the different magnetic poles of the second magnet 22 .

[0117] The first magnet 21 can rotate relative to the second magnet 22. Specifically, the first magnet 21 can be fixed and the second magnet 22 can be rotated, or the second magnet 22 can be fixed and the first magnet 21 can be rotated, or both the first magnet 21 and the second magnet 22 can be rotated.

[0118] The first magnet 21 has different magnetic poles in the circumferential direction of the rotating shaft of the first magnet 21. During the rotation of the first magnet 21, the projected areas of the different magnetic poles of the first magnet 21 on the different magnetic poles of the second magnet 22 will change, that is, the relative positions of the different magnetic poles of the first magnet 21 and the different magnetic poles of the second magnet 22 will change, thereby changing the magnetic field strength at various locations in the magnetic field formed between the first magnet 21 and the second magnet 22; for example, the rotation of the first magnet 21 can change the N pole of the first magnet 21 and the N pole of the second magnet 22. The relative position of the S pole of the first magnet 21 and the N pole of the second magnet 22 is changed, and the overlapping area between the N pole of the first magnet 21 and the S pole of the second magnet 22 is reduced. At this time, the magnetic field strength of the magnetic field generated at the corresponding position will be reduced, and the resistance to the first transmission member 10 will also be reduced. For another example, the rotation of the first magnet 21 can change the relative position of the S pole of the first magnet 21 and the N pole of the second magnet 22, and increase the overlapping area between the S pole of the first magnet 21 and the N pole of the second magnet 22. At this time, the magnetic field strength of the magnetic field generated at the corresponding position will be increased, and the resistance to the first transmission member 10 will also increase.

[0119] In this embodiment, the first magnet 21 is able to rotate relative to the second magnet 22 to change the projection area of ​​the magnetic pole of the first magnet 21 on the opposite magnetic pole of the second magnet 22, thereby changing the strength of the magnetic field formed between the first magnet 21 and the second magnet 22, and thereby changing the resistance provided by the magnetic field to the first transmission member 10, thereby achieving the effect of providing different resistances to the first transmission member 10 through the damping assembly 20.

[0120] 3 , in some embodiments, the first magnet 21 includes a first portion 211 and a second portion 212 having different magnetic properties, and the second magnet 22 includes a third portion 221 and a fourth portion 222 having different magnetic properties, and the third portion 221 and the first portion 211 have different magnetic properties; along the circumference of the rotating shaft of the first magnet 21, the first portion 211 and the second portion 212 are arranged in sequence, and the third portion 221 and the fourth portion 222 are arranged in sequence.

[0121] The first magnet 21 includes a first portion 211 and a second portion 212 with different magnetic properties. The first portion 211 and the second portion 212 are both partial structures of the first magnet 21 facing the second magnet 22. The first portion 211 can be an N pole, and the second portion 212 can be an S pole. The first portion 211 can also be an S pole, and the second portion 212 can be an N pole. The shapes of the first portion 211 and the second portion 212 can be arc-shaped, square or other shapes.

[0122] Because the first magnet 21 can rotate relative to the second magnet 22, the first magnet 21 has a rotating shaft so that the first magnet 21 can rotate around the rotating shaft; the first part 211 and the second part 212 are arranged in sequence around the circumference of the rotating shaft. Specifically, the first part 211 and the second part 212 can be arranged at intervals or abut against each other; when the first part 211 and the second part 212 are arranged at intervals, the first part 211 and the second part 212 can be connected by a structural part.

[0123] Similar to the first magnet 21, the second magnet 22 includes a third part 221 and a fourth part 222 with different magnetic properties. The third part 221 and the fourth part 222 are both partial structures of the second magnet 22 facing the first magnet 21; wherein, the third part 221 can be the N pole, and the first part 211 and the fourth part are the S poles; the third part 221 can also be the S pole, and the first part 211 and the fourth part 222 are the N poles; the shapes of the third part 221 and the fourth part 222 can be arc-shaped, square or other shapes; the third part 221 and the fourth part 222 can be circumferentially spaced around the rotating axis of the first magnet 21, or they can abut each other. When the third part 221 and the fourth part 222 are spaced apart, the third part 221 and the fourth part 222 can be connected by a structural part.

[0124] When the first portion 211 and the third portion 221 are opposite to each other, a magnetic field in which magnetic flux lines can pass through the first transmission member 10 can be generated between the first portion 211 and the third portion 221. The larger the projected area of ​​the first portion 211 on the third portion 221, the greater the magnetic field strength of the magnetic field, and the greater the resistance encountered by the first transmission member 10 when passing through the magnetic field; the smaller the projected area of ​​the first portion 211 on the third portion 221, the smaller the magnetic field strength of the magnetic field, and the smaller the resistance encountered by the first transmission member 10 when passing through the magnetic field.

[0125] Similar to the first part 211 and the third part 221, when the second part 212 is opposite to the fourth part 222, a magnetic field in which magnetic lines of force can pass through the first transmission member 10 can be generated between the second part 212 and the fourth part 222. The larger the projected area of ​​the second part 212 on the fourth part 222, the greater the magnetic field strength of the magnetic field, and the greater the resistance encountered by the first transmission member 10 when passing through the magnetic field; the smaller the projected area of ​​the second part 212 on the fourth part 222, the smaller the magnetic field strength of the magnetic field, and the smaller the resistance encountered by the first transmission member 10 when passing through the magnetic field.

[0126] When the first magnet 21 rotates relative to the second magnet 22, the projected area of ​​the first portion 211 on the third portion 221 will change, and the projected area of ​​the second portion 212 on the fourth portion 222 will also change, thereby adjusting the magnetic field strength of the corresponding magnetic field, thereby achieving the effect of adjusting the resistance experienced by the first transmission member 10.

[0127] This embodiment provides some specific structures of the first magnet 21 and the second magnet 22, so that the first magnet 21 includes a first part 211 and a second part 212 arranged in sequence along its circumference, and the second magnet 22 includes a third part 221 and a fourth part 222 arranged in sequence along the circumference of the first magnet 21, so that the rotation of the first magnet 21 relative to the second magnet 22 can change the projection area of ​​the first part 211 on the third part 221, thereby changing the strength of the magnetic field formed between the first magnet 21 and the second magnet 22, and thereby changing the resistance provided by the magnetic field to the first transmission member 10, thereby achieving the effect of providing different resistances to the first transmission member 10 through the damping assembly 20.

[0128] In some embodiments, the first magnet 21 and the second magnet 22 are both annular magnets, the first part 211 and the second part 212 are respectively half of the first magnet 21, and the first part 211 is the north pole of the first magnet 21, and the second part 212 is the south pole of the first magnet 21; the third part 221 and the fourth part 222 are respectively half of the second magnet 22, and the third part 221 is the south pole of the second magnet 22, and the fourth part 222 is the north pole of the second magnet 22.

[0129] According to some embodiments of the present application, refer to Figures 2 and 3, where Figure 2 is a top view schematic diagram of the pressure roller 40 and the damping device 100 next to it provided in some embodiments of the present application, and Figure 3 is a cross-sectional schematic diagram of the damping device 100 provided in some embodiments of the present application.

[0130] In some embodiments of the present application, the damping device 100 further includes a second transmission member 30 transmission-connected to the first transmission member 10 , and the second transmission member 30 transmission-connected to the pressure roller 40 .

[0131] The second transmission member 30 refers to a structure in the damping device 100 that is connected to the first transmission member 10 and is transmission-connected to the pressure roller 40. At this time, the first transmission member 10 is indirectly transmission-connected to the pressure roller 40 through the second transmission member 30; the material of the second transmission member 30 can be plastic, metal or other materials.

[0132] The second transmission member 30 can be directly connected to the pressure roller 40; for example, the second transmission member 30 can be directly in contact with the pressure roller 40, so that the rotation of the pressure roller 40 can drive the second transmission member 30 to rotate through friction. At this time, the second transmission member 30 can be a friction wheel or other wheel-like structure; for another example, the second transmission member 30 can also be a gear. At this time, a corresponding gear can be set on the pressure roller 40, so that the pressure roller 40 can drive the second transmission member 30 to rotate.

[0133] Since the first transmission member 10 is indirectly connected to the pressure roller 40 through the second transmission member 30, the shape of the first transmission member 10 can be circular, annular, square, triangular or other shapes; the first transmission member 10 can be directly connected to the second transmission member 30 through a rotating shaft, or can be connected to the second transmission member 30 through a coupling or other components. The first transmission member 10 can also be connected to the second transmission member 30 through a gear set, a connecting rod structure or other structures.

[0134] Because the first transmission member 10 needs to be subject to the resistance of the damping assembly 20, if the first transmission member 10 is directly connected to the pressure roller 40, the installation space of the damping assembly 20 will be smaller due to the influence of the first transmission member 10 and the pressure roller 40, and the damping assembly 20 will be difficult to set up; by indirectly connecting the first transmission member 10 and the pressure roller 40 through the second transmission member 30, a larger installation space can be provided for the damping assembly 20, reducing the difficulty of installation and design.

[0135] In this embodiment, the first transmission member 10 is connected to the pressure roller 40 through the second transmission member 30 to facilitate the layout of the structure and alleviate the problem of narrow installation space caused by the direct connection between the first transmission member 10 and the pressure roller 40.

[0136] 3 , in some embodiments, the second transmission member 30 is in contact with the pressure roller 40 and can rotate along with the pressure roller 40 through friction.

[0137] The pressure roller 40 can drive the second transmission member 30 to rotate through friction, so friction patterns and other structures can be set on the surface where the second transmission member 30 contacts the pressure roller 40 to increase the friction between the second transmission member 30 and the pressure roller 40 and reduce the occurrence of idling and slipping.

[0138] The pressure roller 40 drives the second transmission member 30 to rotate through friction, and there is rolling friction between the pressure roller 40 and the second transmission member 30. This setting can protect the pressure roller 40 and the pole piece 50. For example, when the speed of the second transmission member 30 suddenly changes, the second transmission member 30 can slide relative to the pressure roller 40 to reduce the situation where the pressure roller 40 is affected by the second transmission member 30 and the speed suddenly changes, thereby reducing the situation where the load of the pressure roller 40 suddenly changes, and can also reduce the situation where the pole piece 50 is subject to sudden changes in resistance, so as to improve the service life and stability of the pressure roller 40, and can also reduce the negative impact that the damping device 100 may have on the pole piece 50.

[0139] In this embodiment, the second transmission member 30 is brought into contact with the pressure roller 40 so that the pressure roller 40 drives the second transmission member 30 to rotate through friction. Compared with gear transmission and other methods, the use of friction transmission can provide buffering for the damping device 100 and the pressure roller 40, thereby reducing the negative impact that may be caused by the sudden increase in load due to the sudden change in resistance experienced by the first transmission member 10.

[0140] 3 , in some embodiments, the second transmission member 30 includes a base 31 and a damping member 32 arranged around the base 31 , the base 31 is connected to the first transmission member 10 , and the damping member 32 is in contact with the pressure roller 40 and can rotate with the pressure roller 40 through friction.

[0141] The base 31 refers to the structure in the second transmission member 30 that provides a fixed foundation for other structures. The base 31 can be connected to the first transmission member 10 so that the rotation of the second transmission member 30 can drive the first transmission member 10 to rotate; the material of the base 31 can be plastic, metal or other materials.

[0142] The damping member 32 is arranged around the base 31. The damping structure can be an annular member and is mounted outside the base 31. The damping structure can also include multiple arc-shaped or strip-shaped members and are arranged at intervals along the circumference of the second transmission member 30. The material of the damping member 32 can be asbestos friction material, semi-metal friction material or other materials with a higher friction coefficient.

[0143] The damping member 32 may be fixedly connected to the base 31 , for example, by gluing, bolting, or the like; the damping member 32 may also be detachably connected to the base 31 , for example, by snap-fitting, interference fitting, or the like.

[0144] This embodiment provides some specific structures of the second transmission member 30, so that the second transmission member 30 is connected to the first transmission member 10 through the base 31, and is connected to the pressure roller 40 through the damping member 32; because the damping member 32 is connected to the pressure roller 40 through friction, this setting is likely to lead to a shorter life of the damping member 32, so the second transmission member 30 includes the base 31 and the damping member 32 so that the damping member 32 can be replaced separately, so as to improve the overall life of the damping device 100.

[0145] In some embodiments, the material of the damping member 32 includes at least one of a rubber-based material, a carbon fiber material, a resin-based material, or a semi-metallic material.

[0146] The rubber-based material is a polymer composite material with excellent elasticity and reversible deformation ability; the rubber-based material can specifically be butyl rubber (IIR), chlorosulfonated polyethylene rubber (CSM) or other rubber-based materials; because the rubber-based material has elasticity, the material of the damping component 32 includes rubber, which can make the damping component 32 abut against the pressure roller 40 and deform, so that the damping frame can increase the friction between the pressure roller 40 and the pressure roller 40 through the restoring force of the rubber, thereby reducing the occurrence of the second transmission member 30 slipping relative to the pressure roller 40.

[0147] Carbon fiber material is a polymer fiber raw material including carbon elements, which has the characteristics of high strength, high rigidity, wear resistance, high temperature resistance, and fatigue resistance; carbon fiber material can increase the friction coefficient of the damping component 32 and increase the service life of the damping component 32.

[0148] The resin-based material is a composite material with resin as the matrix, and has the characteristics of high strength, high rigidity, wear resistance, high temperature resistance, fatigue resistance, etc. The resin-based material can increase the friction coefficient of the damping component 32 and increase the service life of the damping component 32.

[0149] Semi-metallic materials refer to materials with both metallic and non-metallic properties. For example, they may include ferrous metals (such as steel fibers, reduced iron powder, foamed iron powder, etc.). Semi-metallic materials have the characteristics of high strength, good heat resistance, high absorption power per unit area, and large thermal conductivity, which can increase the service life of the damping component 32.

[0150] The technical solution of this embodiment provides some specific materials for the damping component 32 so that there can be greater friction between the damping component 32 and the pressure roller 40, so that the damping component 32 can better rotate synchronously with the pressure roller 40 and can reduce the sliding friction between the damping component 32 and the pressure roller 40.

[0151] 2 and 3 , in some embodiments, in the axial direction of the pressure roller 40 , the size of the contact surface between the second transmission member 30 and the pressure roller 40 ranges from 3 millimeters (mm) to 20 mm. Specifically, the size can be 3 mm, 5 mm, 7 mm, 10 mm, 12 mm, 15 mm, 18 mm, 20 mm or other values.

[0152] The contact surface between the second transmission member 30 and the pressure roller 40 refers to the surface of the second transmission member 30 facing the pressure roller 40 and capable of contacting the pressure roller 40. The dimension of this surface along the axial direction of the pressure roller 40 is the dimension shown by H in FIG2 . The dimension of the contact surface between the second transmission member 30 and the pressure roller 40 along the axial direction of the pressure roller 40 is positively correlated with the contact area between the second transmission member 30 and the pressure roller 40. According to the structure of the second transmission member 30, the dimension of the contact surface between the second transmission member 30 and the pressure roller 40 along the axial direction of the pressure roller 40 may refer to the dimension of the damping component 32 in the axial direction of the pressure roller 40, that is, the width of the damping component 32, which is also the dimension shown by H in FIG3 .

[0153] By making the size range of the contact surface between the second transmission member 30 and the pressure roller 40 along the axial direction of the pressure roller 40 be 3mm to 20mm, a larger contact area can be provided between the second transmission member 30 and the pressure roller 40, so as to reduce the concentration of pressure of the second transmission member 30 on the pressure roller 40, thereby reducing the negative impact that the second transmission member 30 may have on the pressure roller 40, and also making the second transmission member 30 more stably in contact with the pressure roller 40; at the same time, this size range can also reduce the overall width of the second transmission member 30, thereby reducing the space occupied by the second transmission member 30 and reducing the overall volume and weight of the damping device 100.

[0154] This embodiment provides a width range of the second transmission member 30 so that the second transmission member 30 can better provide resistance to the pressure roller 40, while also reducing the space requirement of the second transmission member 30, thereby reducing the overall volume and weight of the damping device 100.

[0155] According to some embodiments of the present application, referring to FIG3 , FIG3 is a schematic cross-sectional view of a damping device 100 provided in some embodiments of the present application.

[0156] In some embodiments of the present application, the damping device 100 further includes a housing 23 , the second transmission member 30 is disposed outside the housing 23 , and the first transmission member 10 and the damping structure are accommodated in the housing 23 .

[0157] The shell 23 refers to a structure in the damping device 100 that provides a fixed foundation for other structures. The shell 23 is used to provide a fixed foundation for the first transmission member 10, the second transmission member 30, the damping assembly 20 and other structures; the shell 23 can be a rectangular parallelepiped, cylindrical or other shape; the material of the shell 23 can include plastic, metal or other materials.

[0158] A accommodating space is provided in the shell 23, and the first transmission member 10 and the damping structure are accommodated in the accommodating space inside the shell 23 to protect the first transmission member 10 and the damping structure; the second transmission member 30 is provided outside the shell 23 so that the second transmission member 30 is connected to the pressure roller 40; the first transmission member 10 can be connected to the second transmission member 30 through a rotating shaft, a coupling or other structure, at this time, one end of the rotating shaft, coupling or other structure is in the accommodating space and the other end extends outside the accommodating space.

[0159] In this embodiment, the damping device 100 also includes a shell 23, and the shell 23 accommodates the first transmission member 10 and the damping structure to support the first transmission member 10 and the damping structure; at the same time, the second transmission member 30 is located outside the shell 23, so that the second transmission member 30 can be connected to the pressure roller 40 for transmission.

[0160] According to some embodiments of the present application, referring to FIG1 , FIG1 is a top view schematic diagram of a pole piece flattening device 200 provided in some embodiments of the present application.

[0161] In some embodiments of the present application, the pole piece flattening device 200 includes at least one pressing roller 40 , and at least one damping device 100 can be provided on the circumference of any pressing roller 40 .

[0162] The number of pressure rollers 40 can be one, or two or more, and the pressure rollers 40 can be arranged on any side of the pole piece 50 as needed; the damping device 100 can be arranged on one side of any pressure roller 40 as needed, or damping devices 100 can be arranged next to multiple pressure rollers 40; depending on the resistance required by the pressure roller 40, one damping device 100 can be arranged next to the pressure roller 40, or two or more damping devices 100 can be arranged.

[0163] In this embodiment, the damping device 100 can be arranged beside any pressure roller 40 as needed, or can be arranged beside several pressure rollers 40 respectively; at the same time, only one damping device 100 can be arranged beside each pressure roller 40, or multiple damping devices 100 can be arranged to adapt to different requirements of different working conditions.

[0164] According to some embodiments of the present application, refer to FIG4 , which is a three-dimensional schematic diagram of a bracket in a damping device 100 provided in some embodiments of the present application.

[0165] In some embodiments of the present application, the damping device 100 further includes a bracket 24 , which is detachably disposed beside any pressure roller 40 .

[0166] The bracket 24 refers to a structure in the damping device 100 that provides a fixed foundation for the damping assembly 20; the bracket 24 may include a columnar structure, a frame structure or other structures; the material of the bracket 24 may be plastic, metal or other materials.

[0167] The bracket 24 can be detachably arranged beside any pressure roller 40 so that the staff can install the damping device 100 beside the pressure roller 40 as needed. The detachable connection method of the bracket 24 can be achieved through bolt connection, snap connection or other connection methods; the bracket 24 can be installed on the frame of the pole piece flattening device 200, or on the frame or other structural parts of the pressure roller 40.

[0168] In this embodiment, the damping device 100 can be detachably mounted on the side of any pressure roller 40 via the bracket 24, so that the operator can change the position of the damping device 100 according to actual working conditions, thereby improving the flexibility of the use of the damping device 100 and reducing costs.

[0169] In some embodiments, the pole piece flattening device 200 is arranged after the cold pressing process of the pole piece 50, the pressure roller 40 is arranged at the exit of the cold pressing process, and there are two damping devices 100, which are respectively arranged on both sides of the pressure roller 40 to apply resistance to the pressure roller 40; the damping structure in the second transmission member 30 of the damping device 100 is mainly composed of carbon fiber material; the axial size of the damping structure in the pressure roller 40 is 8 mm; the cross-sectional shape of the damping structure along the radial direction of the second transmission member 30 is a rounded rectangle; the first magnet 21 in the damping device 100 has at least nine different rotational positions, so that the damping device 100 can provide at least nine different resistances for the pressure roller 40.

[0170] The substrate of the pole piece 50 passing through the pole piece flattening device 200 is a copper foil with a thickness of 6 micrometers (um).

[0171] In a second aspect, some embodiments of the present application further provide a pole piece coating device for coating an active material on a current collector of a pole piece 50. The pole piece coating device may include a pressing roller 40, which is used to flatten the active material coated on the pole piece 50 and flatten the blank area 51. The pressing roller 40 is a passive roller and is a synchronous roller as the pole piece 50 moves. The pressing roller 40 is used to ensure a uniform and smooth distribution of the active material and to reduce wrinkles in the blank area 51.

[0172] In some embodiments of the present application, the electrode coating device includes the damping device 100 and the pressure roller 40 provided in some embodiments of the first aspect, the pressure roller 40 can be pressed on the electrode 50, and the pressure roller 40 can rotate with the displacement of the electrode 50; the damping device 100 includes a first transmission member 10 and a damping assembly 20, the first transmission member 10 can rotate with the pressure roller 40; the damping assembly 20 is arranged next to the first transmission member 10, and the damping assembly 20 can apply resistance to the first transmission member 10.

[0173] Similar to the pole piece flattening device 200 provided in some embodiments of the first aspect, the pressure roller 40 can rotate with the displacement of the pole piece 50; the damping device 100 is arranged on one side of the pressure roller 40, and the rotation of the pressure roller 40 can drive the first transmission member 10 of the damping device 100 to rotate; the damping device 100 can apply resistance to the first transmission member 10 to reduce the rotational speed of the first transmission member 10, thereby reducing the rotational speed of the pressure roller 40; the reduction in the rotational speed of the pressure roller 40 causes the pressure roller 40 to generate a relative movement in the opposite direction to the pole piece 50, and forms a force opposite to the movement direction of the pole piece 50, so as to reduce the travel speed of the pole piece 50.

[0174] When the pressure roller 40 is displaced or skewed, or the pole piece 50 is skewed or wrinkled, the damping device 100 is activated and causes the pressure roller 40 to form a movement and force in the opposite direction to the pole piece 50. The movement has a component movement in the direction perpendicular to the pole piece 50, so as to stretch the pole piece 50 and flatten the wrinkles. The other component movement of the movement can drive the pole piece 50 to move to alleviate the displacement and skew of the pole piece 50; the force has a component force in the direction perpendicular to the pole piece 50, which can stretch the pole piece 50 to alleviate the wrinkles of the pole piece 50 and flatten the wrinkles of the pole piece 50. The other component force of the force can drive the pole piece 50 to move to alleviate the problem of displacement of the pole piece 50 and correct the position of the pole piece 50.

[0175] In some embodiments, the pole piece coating device includes at least one pressing roller 40 , and at least one damping device 100 can be provided on the circumference of any pressing roller 40 .

[0176] Similar to the pole piece flattening device 200 provided in some embodiments of the first aspect, the number of pressure rollers 40 can be one, or two or more, and the pressure rollers 40 can be arranged on any side of the pole piece 50 as needed; the damping device 100 can be arranged on one side of any pressure roller 40 as needed, or damping devices 100 can be arranged next to multiple pressure rollers 40; depending on the resistance required by the pressure roller 40, one damping device 100 can be arranged next to the pressure roller 40, or two or more damping devices 100 can be arranged.

[0177] In this embodiment, the damping device 100 can be arranged beside any pressure roller 40 as needed, or can be arranged beside several pressure rollers 40 respectively; at the same time, only one damping device 100 can be arranged beside each pressure roller 40, or multiple damping devices 100 can be arranged to adapt to different requirements of different working conditions.

[0178] In some embodiments, the damping device 100 further includes a bracket 24 , which is detachably disposed beside any pressure roller 40 .

[0179] Similar to the pole piece flattening device 200 provided in some embodiments of the first aspect, the bracket 24 can be detachably arranged beside any pressure roller 40 to facilitate the staff to install the damping device 100 beside the pressure roller 40 as needed. The detachable connection method of the bracket 24 can be achieved through bolt connection, snap connection or other connection methods; the bracket 24 can be installed on the frame of the pole piece coating device, or it can be installed on the frame or other structural parts of the pressure roller 40.

[0180] In this embodiment, the damping device 100 can be detachably mounted on the side of any pressure roller 40 via the bracket 24, so that the operator can change the position of the damping device 100 according to actual working conditions, thereby improving the flexibility of the use of the damping device 100 and reducing costs.

[0181] In some embodiments, a pressure roller 40 is provided next to the oven outlet of the pole piece coating device, and a damping device 100 is provided and arranged next to the pressure roller 40 and can apply resistance to the pressure roller 40; the damping structure in the second transmission member 30 of the damping device 100 is mainly composed of a resin-based material; the axial dimension of the damping structure in the pressure roller 40 is 5 mm; the cross-sectional shape of the damping structure along the radial direction of the second transmission member 30 is a right-angled rectangle; the first magnet 21 in the damping device 100 has at least nine different rotational positions, so that the damping device 100 can provide at least nine different resistances for the pressure roller 40.

[0182] The substrate of the electrode 50 coated on the electrode coating device is a copper foil with a thickness of 5 micrometers (um).

[0183] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A pole piece flattening device, characterized in that: include: A pressure roller, capable of pressing and holding the pole piece, and the pressure roller can rotate with the displacement of the pole piece; A damping device, comprising a first transmission member and a damping assembly; The first transmission member can rotate with the pressure roller; the damping component is arranged beside the first transmission member, and the damping component can apply resistance to the first transmission member.

2. The pole piece flattening device according to claim 1, characterized in that: The damping assembly includes at least two different states to apply resistances of different magnitudes to the first transmission member.

3. The pole piece flattening device according to claim 1 or 2, characterized in that: The material of the first transmission member includes a magnetic conductive material, and the damping component can form a magnetic field around the first transmission member; The rotation of the first transmission member in the magnetic field can form a closed current inside the first transmission member.

4. The pole piece flattening device according to claim 3, characterized in that: The first transmission element comprises an annular component, so that the first transmission element rotates in the magnetic field to form an annular closed current inside the first transmission element.

5. The pole piece flattening device according to claim 3 or 4, characterized in that: The damping assembly includes a first magnet and a second magnet disposed on opposite sides of the first transmission member, and the first magnet is movable relative to the second magnet.

6. The pole piece flattening device according to claim 5, characterized in that: The first magnet is rotatable relative to the second magnet, and the first magnet has different magnetic poles in the circumferential direction of its rotation axis to change the projection areas of different magnetic poles of the first magnet on different magnetic poles of the second magnet.

7. The pole piece flattening device according to claim 6, characterized in that: The first magnet includes a first portion and a second portion having different magnetic properties, the second magnet includes a third portion and a fourth portion having different magnetic properties, and the third portion and the first portion have different magnetic properties; Along the circumferential direction of the rotation axis of the first magnet, the first portion and the second portion are arranged in sequence, and the third portion and the fourth portion are arranged in sequence.

8. The pole piece flattening device according to any one of claims 1 to 7, characterized in that: The damping device further comprises a second transmission member drivingly connected to the first transmission member, and the second transmission member drivingly connected to the pressure roller.

9. The pole piece flattening device according to claim 8, characterized in that: The second transmission member is in contact with the pressure roller and can rotate along with the pressure roller through friction.

10. The pole piece flattening device according to claim 9, characterized in that: The second transmission member includes a base and a damping member arranged around the base, the base is connected to the first transmission member, and the damping member is in contact with the pressure roller and can rotate with the pressure roller through friction.

11. The pole piece flattening device according to claim 9 or 10, characterized in that: The material of the damping member includes at least one of a rubber-based material, a carbon fiber material, a resin-based material or a semi-metallic material.

12. The pole piece flattening device according to any one of claims 9 to 11, characterized in that: In the axial direction of the pressure roller, the size range of the contact surface between the second transmission member and the pressure roller is 3 mm to 20 mm.

13. The pole piece flattening device according to any one of claims 9 to 12, characterized in that: The damping device further comprises a housing, the second transmission member is arranged outside the housing, and the first transmission member and the damping structure are accommodated in the housing.

14. The pole piece flattening device according to any one of claims 1 to 13, characterized in that: The pole piece flattening device comprises at least one of the pressure rollers, and at least one of the damping devices can be arranged on the circumference of any of the pressure rollers.

15. The pole piece flattening device according to any one of claims 1 to 14, characterized in that: The damping device further comprises a bracket, and the bracket is detachably arranged beside any one of the pressing rollers.

16. A pole piece coating device, characterized in that: include: A pressing roller, capable of pressing and holding the pole piece, and the pressing roller can rotate with the displacement of the pole piece; A first transmission member capable of rotating with the pressure roller; The damping component is arranged beside the first transmission member, and the damping component can apply resistance to the first transmission member.

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