Lithium battery coating roller and battery processing device

Abstract

The embodiment of the utility model provides a lithium battery coating roller and a battery processing device. The lithium battery coating roller comprises a coating roller body, the surface of the coating roller body comprises film coating areas and non-film coating areas which are arranged in a staggered mode, and one non-film coating area is arranged between every two adjacent film coating areas; the ceramic area is arranged between the film coating area and the non-film coating area, and the ceramic area protrudes out of the film coating area and the non-film coating area, so that step structures are formed between the film coating area and the ceramic area and between the non-film coating area and the ceramic area. When the lithium battery coating roller attached to the surface B of the battery pole piece is used for coating, the film coating area and the ceramic area can be uniformly coated on the foil, so that the critical part of the film coating area and the ceramic area has no height difference, main slurry and ceramic slurry are not easy to mix, the size of a virtual edge (a main slurry and ceramic slurry mixing area) is reduced, and the production efficiency is improved. The bad size of the pole piece and the dislocation of the A surface and the B surface of the pole piece are reduced, and the probability of risks such as insufficient battery capacity and lithium precipitation is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, in particular to a lithium battery coating roller and a battery processing device. Background Art

[0002] With the rapid growth of the demand for power batteries, the production requirements for power batteries are also gradually increasing. Among them, the requirements for the coating process have become higher. At present, the coating process not only requires high efficiency, but also the coating width of the coating process increases, and at the same time, the coating speed and surface density also increase accordingly.

[0003] However, in the coating process of lithium polymer batteries, due to the relatively thick thickness of the coating area of the positive electrode of lithium polymer batteries, when passing through the coating process with high speed and high surface density, there is a thickness difference between the coating film area and the ceramic area at the steel roller during coating. After rolling and drying in an oven, the main slurry and the ceramic slurry are seriously mixed, resulting in a relatively large size of the virtual edge (the mixing area of the main slurry and the ceramic slurry), causing problems such as poor coating film area size, misalignment of single and double sides of coating, insufficient capacity, and lithium deposition. Summary of the Utility Model

[0004] In order to solve or partially solve the above problems, the utility model discloses a lithium battery coating roller and a battery processing device to solve the problems in the prior art that the main slurry and the ceramic slurry are seriously mixed, resulting in a relatively large size of the virtual edge (the mixing area of the main slurry and the ceramic slurry), causing problems such as poor coating film area size, misalignment of single and double sides of coating, insufficient capacity, and lithium deposition.

[0005] In a first aspect, to solve the above problems, an embodiment of the utility model provides a lithium battery coating roller, which includes:

[0006] A coating roller main body, on the surface of which there are alternately arranged coating film areas and non - coating film areas, and one non - coating film area is arranged between every two adjacent coating film areas;

[0007] A ceramic area, which is arranged between the coating film area and the non - coating film area. Among them, the ceramic area protrudes from the coating film area and the non - coating film area to form a stepped structure between the coating film area and the ceramic area and between the non - coating film area and the ceramic area.

[0008] Optionally, an installation shaft is arranged at each end of the coating roller main body, and the installation shaft is inserted and connected with the coating roller main body.

[0009] Optionally, the installation shaft is a stepped shaft.

[0010] Optionally, the coating roller main body includes a housing and a weight structure;

[0011] The outer shell is a cylindrical frame structure. A counterweight cavity is formed inside the outer shell, and the counterweight structure is arranged in the counterweight cavity.

[0012] And they are arranged at equal intervals in a ring around the axis of the outer shell.

[0013] Optionally, the number of each counterweight structure is equal to the number of the coating areas, and the counterweight structure and the coating area are in a relative position in the radial direction of the coating roller body.

[0014] Optionally, the width of each coating area is equal, and the width of each non - coating area is equal. The width of the coating area is the dimension of the coating area in the axial direction of the coating roller body, and the width of the non - coating area is the dimension of the non - coating area in the axial direction of the coating roller body.

[0015] Optionally, the number of the ceramic areas is equal to twice the number of the coating areas.

[0016] Optionally, the distance between the ceramic area and the axis of the coating roller body is a first distance, the distance between the coating area and the axis of the coating roller body is a second distance, and the distance between the non - coating area and the axis of the coating roller body is a third distance. Among them, the second distance is equal to the third distance, and the first distance is greater than the second distance.

[0017] Optionally, the difference between the first distance and the second distance is greater than or equal to 150 micrometers.

[0018] In a second aspect, an embodiment of the present invention further provides a battery processing device, and the battery processing device includes the lithium - battery coating roller according to any one of the embodiments in the first aspect.

[0019] In the embodiment of the present utility model, since the surface of the coating roller body includes alternately arranged coating film areas and non-coating film areas, with a non-coating film area arranged between every two adjacent coating film areas, and the ceramic area is arranged between the coating film area and the non-coating film area, wherein the ceramic area protrudes from the coating film area and the non-coating film area to form a stepped structure between the coating film area and the ceramic area and between the non-coating film area and the ceramic area. Therefore, when the coating work is carried out through the coating roller body, the lithium battery coating roller in contact with the A side of the battery electrode can be set as the lithium battery coating roller provided by the embodiment of the present utility model. In this way, there is a height difference between the coating film area and the ceramic area of the lithium battery coating roller in contact with the A side of the battery electrode. When the lithium battery coating roller in contact with the B side of the battery electrode comes into contact, the height difference between the coating film area and the ceramic area of the lithium battery coating roller in contact with the A side of the battery electrode can make up for the height difference between the coating film area and the ceramic area of the lithium battery coating roller in contact with the B side of the battery electrode. In this way, when the lithium battery coating roller in contact with the B side of the battery electrode is used for coating, the coating film area and the ceramic area can be evenly coated on the foil material, so that there is no height difference at the critical part between the coating film area and the ceramic area, and the main slurry and the ceramic slurry are not easily mixed, thereby reducing the size of the virtual edge (the mixing area of the main slurry and the ceramic slurry), reducing the size defect of the electrode and the misalignment between the A side and the B side of the electrode, and reducing the probability of risks such as insufficient battery capacity and lithium deposition. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 is a schematic structural diagram of a lithium battery coating roller provided by an embodiment of the present utility model;

[0022] Figure 2 is a cross-sectional structural diagram of a lithium battery coating roller provided by an embodiment of the present utility model along Figure 1 the Z-Z direction.

[0023] Description of the reference numerals:

[0024] 1: Coating roller body; 11: Coating film area; 12: Non-coating film area; 13: Ceramic area; 14: Outer shell; 15: Counterweight structure; 2: Mounting shaft.

[0025] Through the above drawings, the clear embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and the text description are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the embodiments of the utility model for those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0026] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0027] It should be understood that the "one embodiment" or "an embodiment" mentioned throughout the specification means that a specific feature, structure or characteristic related to the embodiment is included in at least one embodiment of the present utility model. Therefore, the appearances of "in one embodiment" or "in an embodiment" throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics may be combined in any suitable manner in one or more embodiments.

[0028] Figure 1 is a schematic structural diagram of a lithium battery coating roller provided by an embodiment of the present utility model, Figure 2 is a schematic cross-sectional structure diagram of a lithium battery coating roller provided by an embodiment of the present utility model, as Figure 1 and Figure 2 shown. The lithium battery coating roller includes:

[0029] A coating roller main body 1, on the surface of the coating roller main body 1, there are alternately arranged coating film areas 11 and non-coating film areas 12, and a non-coating film area 12 is arranged between every two adjacent coating film areas 11.

[0030] A ceramic area 13, the ceramic area 13 is arranged between the coating film area 11 and the non-coating film area 12. Among them, the ceramic area 13 protrudes from the coating film area 11 and the non-coating film area 12 to form a stepped structure between the coating film area 11 and the ceramic area 13, and between the non-coating film area 12 and the ceramic area 13.

[0031] As can be seen from the above embodiments, in the embodiments of the present utility model, since the surface of the coating roller body 1 includes a coating film area 11 and a non - coating film area 12 which are arranged alternately, a non - coating film area 12 is arranged between every two adjacent coating film areas 11, and a ceramic area 13 is arranged between the coating film area 11 and the non - coating film area 12. Among them, the ceramic area 13 protrudes from the coating film area 11 and the non - coating film area 12 to form a stepped structure between the coating film area 11 and the ceramic area 13 and between the non - coating film area 12 and the ceramic area 13. Therefore, when the coating work is carried out through the coating roller body 1, the lithium - battery coating roller in contact with the A - side of the battery electrode can be set as the lithium - battery coating roller provided by the embodiments of the present utility model. In this way, there is a height difference between the coating film area 11 and the ceramic area 13 of the lithium - battery coating roller in contact with the A - side of the battery electrode. When it comes into contact with the lithium - battery coating roller attached to the B - side of the battery electrode, the height difference between the coating film area 11 and the ceramic area 13 of the lithium - battery coating roller in contact with the A - side of the battery electrode can make up for the height difference between the coating film area 11 and the ceramic area 13 of the lithium - battery coating roller attached to the B - side of the battery electrode. In this way, when the lithium - battery coating roller attached to the B - side of the battery electrode is used for coating, the coating film area 11 and the ceramic area 13 can be evenly coated on the foil material, so that there is no height difference at the critical part between the coating film area 11 and the ceramic area 13, and the main slurry and the ceramic slurry are not easily mixed, thereby reducing the size of the virtual edge (the mixing area of the main slurry and the ceramic slurry), reducing the size defect of the electrode and the misalignment between the A - side and the B - side of the electrode, and reducing the probability of risks such as insufficient battery capacity and lithium deposition.

[0032] Among them, in the above embodiments, the A - side and the B - side of the battery coating process refer to the distinction between two different surfaces of the coating process when coating the current collector during the manufacture of lithium batteries. During the manufacture of lithium batteries, the coating process is a key step. The coating process involves evenly coating the positive electrode slurry or the negative electrode slurry on two surfaces (i.e., the A - side and the B - side) of the current collector. This coating method has a direct impact on the performance of lithium batteries, including aspects such as the battery capacity, internal resistance, cycle life, and safety. The selection and control parameters of the coating process have an important impact on the performance of lithium - ion batteries. Specifically, the coating process involves coating the uniformly stirred slurry on the surface of the current collector and removing the organic solvent in the slurry through drying. This process needs to ensure the uniform coating of the electrode to ensure the performance of the battery. The concept of the A - side and the B - side is particularly important when evaluating the coating uniformity.

[0033] In addition, the coating roller body 1 provided by the embodiments of the present utility model can be an integral cylindrical structure, a multi - layer cylindrical structure, or a cylindrical shell structure with a hollow interior. The embodiments of the present utility model do not make any limitations in this regard. The coating film area 11 and the non - coating film area 12 are arranged at intervals, that is, a non - coating film area 12 is arranged between every two adjacent coating film areas 11, so that the coating processes between multiple coating film areas 11 do not interfere with each other.

[0034] A ceramic region 13 is provided between the coating film region 11 and the non - coating film region 12. The ceramic region 13 is used for coating ceramic slurry, and the coating film region 11 is used for coating main slurry. In the embodiment of the present utility model, the ceramic region 13 protrudes from the coating film region 11 and the non - coating film region 12. That is to say, the distance between the ceramic region 13 and the axis of the coating roller main body 1 is greater than the distance between the coating film region 11 and the axis of the coating roller main body 1, and the distance between the ceramic region 13 and the axis of the coating roller main body 1 is greater than the distance between the non - coating film region 12 and the axis of the coating roller main body 1. This causes a height difference between the ceramic region 13 and the coating film region 11, and a height difference between the ceramic region 13 and the non - coating film region 12. Furthermore, a stepped structure is formed between the coating film region 11 and the ceramic region 13, and between the non - coating film region 12 and the ceramic region 13. This stepped structure can be understood as a shoulder structure with a changing height. In other words, the stepped structure is the critical interface generated by the height difference.

[0035] In one embodiment, an installation shaft 2 is provided at each end of the coating roller main body 1, and the installation shaft 2 is inserted and connected to the coating roller main body 1.

[0036] In this embodiment, installation holes can be provided at both ends in the axial direction of the coating roller main body 1. The installation shaft 2 is inserted into the installation holes and has an interference fit with the installation holes, thereby facilitating the assembly and cooperation of the lithium - battery coating roller with other components. In another embodiment of the present utility model, installation holes are provided at both ends in the axial direction of the coating roller main body 1, and the installation shaft 23 is inserted into the installation holes and is key - connected thereto.

[0037] In one embodiment, the installation shaft 2 is a stepped shaft. In this way, due to the design feature of the stepped shaft that the diameters of its respective shaft sections are different, when the installation shaft 2 is a stepped shaft, the strength of each shaft section can be made close, and it is convenient for the installation and fixation of the parts on the installation shaft 2. This not only improves the strength of the installation shaft 2, but also simplifies the installation process of the parts, making the use of the installation shaft 2 more convenient and efficient. In addition, while ensuring the strength of the installation shaft 2, material waste can be avoided, and the material utilization efficiency is improved.

[0038] In one embodiment, the coating roller main body 1 includes a housing 14 and a counterweight structure 15; the housing 14 is a cylindrical frame structure, a counterweight cavity is formed inside the housing 14, and the counterweight structure 15 is arranged in the counterweight cavity and is arranged at equal intervals in a ring around the axis of the housing 14.

[0039] In this embodiment, the outer shell 14 included in the coating roller main body 1 is designed as a cylindrical frame structure, which can effectively reduce the overall mass of the coating roller main body 1. Then, a counterweight structure 15 is arranged inside the housing to adjust the mass distribution of the coating roller main body 1. In the present utility model, the masses of all the counterweight structures 15 are the same. In this way, when the counterweight structure 15 is arranged inside the housing, the mass ratio of the counterweight structure 15 increases. Since the counterweight structure 15 is arranged in the counterweight cavity and is arranged at equal intervals in a ring shape around the axis of the outer shell 14, the counterweight structure 15 is arranged in a regular manner. Therefore, the counterweight structure 15 can ensure the uniformity of the overall mass distribution of the coating roller main body 1. In this way, when the lithium battery coating roller rotates, the vibration of the lithium battery coating roller can be effectively reduced, and the stability of the operation of the coating equipment can be improved. It should be noted that the counterweight structure 15 provided in the embodiment of the present utility model can be a structure in any shape such as a counterweight ring, a counterweight block or a counterweight rod. Exemplarily, when the counterweight structure 15 is a counterweight ring, an installation shaft 2 can be arranged inside the housing. The axis of the installation shaft 2 coincides with the axis of the outer shell 14. The counterweight rings are arranged at intervals on the installation shaft 2, and the axes of the plurality of counterweight rings coincide with the axis of the installation shaft 2.

[0040] In one embodiment, the number of each counterweight structure 15 is equal to the number of the coating areas 11, and the counterweight structure 15 and the coating area 11 are in a relative position in the radial direction of the coating roller main body 1.

[0041] In this embodiment, since the coating area 11 is the main force-applying or force-bearing part, when the number of each counterweight structure 15 is equal to the number of the coating areas 11 and the counterweight structure 15 and the coating area 11 are in a relative position in the radial direction of the coating roller main body 1, the position where the counterweight structure 15 is located and the position where the coating area 11 is located are in a relative position in the radial direction. And since the distance between every two adjacent coating areas 11 is equal, the counterweight structure 15 can be ensured to be arranged in a regular manner, and the position of the center of gravity of each position of the coating roller main body 1 can correspond to the coating area 11 that needs to apply or bear force, further reducing the vibration of the lithium battery coating roller and improving the stability of the operation of the coating equipment.

[0042] In one embodiment, the width of each coating area 11 is equal, the width of each non-coating area 12 is equal. The width of the coating area 11 is the dimension of the coating area 11 in the axial direction of the coating roller main body 1, and the width of the non-coating area 12 is the dimension of the non-coating area 12 in the axial direction of the coating roller main body 1.

[0043] In this embodiment, since the widths of each coating area 11 are equal and the widths of each non - coating area 12 are equal, where the width of the coating area 11 is the dimension of the coating area 11 in the axial direction of the coating roll body 1, and the width of the non - coating area 12 is the dimension of the non - coating area 12 in the axial direction of the coating roll body 1, the regularity of the width dimension of each coating area 11 can be ensured, thereby ensuring the stability of the coating process of the lithium - battery coating roll.

[0044] In one embodiment, the number of ceramic areas 13 is equal to twice the number of coating areas 11.

[0045] In this embodiment, transition areas can be provided at both ends in the axial direction of the coating roll body 1, that is, areas that are neither coating areas 11 nor non - coating areas 12. In this way, the coating areas 11 are arranged close to the transition areas, and a ceramic area 13 is provided between the coating area 11 and the transition area, so that the number of ceramic areas 13 is equal to twice the number of coating areas 11, and further, the number of ceramic areas 13 can be adapted to the number of outputs of the coating process of the lithium - battery coating roll to further ensure the optimization degree of the size of the coating area 11.

[0046] In one embodiment, the distance between the ceramic area 13 and the axis of the coating roll body 1 is a first distance, the distance between the coating area 11 and the axis of the coating roll body 1 is a second distance, and the distance between the non - coating area 12 and the axis of the coating roll body 1 is a third distance. Among them, the second distance is equal to the third distance, and the first distance is greater than the second distance.

[0047] In this embodiment, since the distance between the ceramic area 13 and the axis of the coating roll body 1 is a first distance, the distance between the coating area 11 and the axis of the coating roll body 1 is a second distance, and the distance between the non - coating area 12 and the axis of the coating roll body 1 is a third distance, the second distance is equal to the third distance, and the first distance is greater than the second distance, the coating area 11 and the non - coating area 12 are in the same plane, ensuring a height difference is formed between the coating area 11 and the ceramic area 13, and a height difference is formed between the non - coating area 12 and the ceramic area 13.

[0048] In one embodiment, the difference between the first distance and the second distance is greater than or equal to 150 microns.

[0049] In this embodiment, since the thickness of the coating film area 11 of the positive electrode sheet approaches 230 microns, the thickness of the ceramic area 13 approaches 80 microns, and the height difference between the two is 150 microns. Therefore, the difference between the first distance and the second distance is greater than or equal to 150 microns, that is, the height difference between the distance between the ceramic area 13 and the axis of the coating roller body 1 and the distance between the coating film area 11 and the axis of the coating roller body 1 is greater than 150 microns. Furthermore, it can be ensured that the height difference between the coating film area 11 and the ceramic area 13 of the lithium battery coating roller in contact with the A side of the battery electrode sheet can make up for the height difference between the coating film area 11 and the ceramic area 13 of the lithium battery coating roller in contact with the B side of the battery electrode sheet.

[0050] As can be seen from the above embodiment, in the embodiment of the present invention, since the surface of the coating roller body 1 includes an alternately arranged coating film area 11 and a non - coating film area 12, a non - coating film area 12 is arranged between every two adjacent coating film areas 11, and the ceramic area 13 is arranged between the coating film area 11 and the non - coating film area 12. Among them, the ceramic area 13 protrudes from the coating film area 11 and the non - coating film area 12 to form a stepped structure between the coating film area 11 and the ceramic area 13 and between the non - coating film area 12 and the ceramic area 13. Therefore, when the coating work is carried out by the coating roller body 1, the lithium battery coating roller in contact with the A side of the battery electrode sheet can be set as the lithium battery coating roller provided by the embodiment of the present invention. In this way, there is a height difference between the coating film area 11 and the ceramic area 13 of the lithium battery coating roller in contact with the A side of the battery electrode sheet. When it comes into contact with the lithium battery coating roller in contact with the B side of the battery electrode sheet, the height difference between the coating film area 11 and the ceramic area 13 of the lithium battery coating roller in contact with the A side of the battery electrode sheet can make up for the height difference between the coating film area 11 and the ceramic area 13 of the lithium battery coating roller in contact with the B side of the battery electrode sheet. In this way, when the coating is carried out by the lithium battery coating roller in contact with the B side of the battery electrode sheet, the coating film area 11 and the ceramic area 13 can be evenly coated on the foil material, so that there is no height difference at the critical point between the coating film area 11 and the ceramic area 13, and the main slurry and the ceramic slurry are not easily mixed, thereby reducing the size of the virtual edge (the mixing area of the main slurry and the ceramic slurry), reducing the size defects of the electrode sheet and the misalignment between the A side and the B side of the electrode sheet, and reducing the probability of risks such as insufficient battery capacity and lithium deposition.

[0051] In addition, the embodiment of the present invention further provides a battery processing device, and the battery processing device includes the lithium battery coating roller described in any of the above embodiments. Since the lithium battery coating roller has the advantages of reducing the size defects of the electrode sheet and the misalignment between the A side and the B side of the electrode sheet, and reducing the probability of risks such as insufficient battery capacity and lithium deposition, it can make the quality of the battery prepared by the battery processing device higher, which is beneficial to improving the yield rate of the battery processing device.

[0052] Each embodiment in the description is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other.

[0053] Although the preferred embodiments of the embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications to these embodiments once they know the basic creative concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the present invention.

[0054] Finally, it should also be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or terminal device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or terminal device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the existence of additional identical elements in the process, method, article or terminal device comprising the said element.

[0055] The above has introduced the present invention in detail. Specific examples are used in this text to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A lithium battery coating roller, characterized in that, The lithium battery coating roll includes: A coating roll body, on the surface of which there are alternately arranged coating film areas and non - coating film areas, and one non - coating film area is arranged between every two adjacent coating film areas; A ceramic area, which is arranged between the coating film area and the non - coating film area. Among them, the ceramic area protrudes from the coating film area and the non - coating film area to form a stepped structure between the coating film area and the ceramic area and between the non - coating film area and the ceramic area.

2. The lithium battery coating roller according to claim 1, characterized in that, One mounting shaft is arranged at each end of the coating roll body, and the mounting shaft is inserted and connected with the coating roll body.

3. The lithium battery coating roller according to claim 2, characterized in that The mounting shaft is a stepped shaft.

4. The lithium battery coating roller according to claim 1, wherein The coating roll body includes a housing and a weight structure; The housing is a cylindrical frame structure, a weight cavity is formed inside the housing, and the weight structure is arranged in the weight cavity, and is arranged at equal intervals in a ring around the axis of the housing.

5. The lithium battery coating roller according to claim 4, wherein The number of each weight structure is equal to the number of the coating film areas, and the weight structure and the coating film area are in a relative position in the radial direction of the coating roll body.

6. The lithium battery coating roller according to claim 1, wherein The width of each coating film area is equal, the width of each non - coating film area is equal. The width of the coating film area is the dimension of the coating film area in the axial direction of the coating roll body, and the width of the non - coating film area is the dimension of the non - coating film area in the axial direction of the coating roll body.

7. The lithium battery coating roller according to claim 1, wherein The number of the ceramic areas is equal to twice the number of the coating film areas.

8. The lithium battery coating roll according to claim 1, characterized in that, The distance between the ceramic area and the axis of the coating roll body is the first distance, the distance between the coating film area and the axis of the coating roll body is the second distance, and the distance between the non - coating film area and the axis of the coating roll body is the third distance. Among them, the second distance is equal to the third distance, and the first distance is greater than the second distance.

9. The lithium battery coating roller according to claim 8, wherein, The difference between the first distance and the second distance is greater than or equal to 150 microns.

10. A battery processing device, characterized in that, The battery processing device includes the lithium battery coating roll according to any one of claims 1 - 9.

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