A textured roll for coating of lithium battery separators and a method of making the same

Abstract

The present application relates to a kind of for lithium battery separator coating anilox roll, comprising: metal roller body, a pair of installation shaft being arranged at the both ends of the metal roller body and ceramic coating being arranged at the outer circumferential surface of the metal roller body;Several pits are circumferentially provided on the outer circumferential surface of the ceramic coating;Several the pit is uniformly arranged on the outer circumferential surface of the ceramic coating along the axis direction of the metal roller body, several the pit is parallel to each other, and several the pit is perpendicular to the axis direction of the metal roller body;At least one gap is provided between adjacent pit, or / and at least one partition is provided in the pit.The anilox roll of the present application has good material capacity, which can ensure the coating effect of slurry and is easy to clean;The setting of gap improves the flow leveling of slurry, so as to further ensure the performance of lithium battery;In addition, the anilox roll also has wear resistance, corrosion resistance and other properties, and the setting of installation shaft also facilitates the cleaning and maintenance of anilox roll.

Description

Technical Field

[0001] This invention relates to the technical field of lithium battery separator coating machine accessories, and in particular to an anilox roller for lithium battery separator coating and its preparation method. Background Technology

[0002] Currently, the anilox rollers used for coating lithium battery separators typically employ a 45° oblique anilox pattern. During the use of the anilox roller, the coating slurry will flow in the same direction, resulting in poor parallel flow of the coating slurry and potentially affecting the performance of the lithium battery.

[0003] Therefore, there is an urgent need for an anilox roller for coating lithium battery separators and its preparation method. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing an anilox roller for coating lithium battery separators and its preparation method.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A first aspect of the present invention is to provide an anilox roller for coating lithium battery separators, comprising: a metal roller body, a pair of mounting shafts disposed at both ends of the metal roller body, and a ceramic coating disposed on the outer peripheral surface of the metal roller body; a plurality of pits are provided around the outer peripheral surface of the ceramic coating; the plurality of pits are uniformly disposed on the outer peripheral surface of the ceramic coating along the axial direction of the metal roller body, the plurality of pits are parallel to each other, and the plurality of pits are perpendicular to the axial direction of the metal roller body; at least one notch is provided between adjacent pits, and / or at least one partition is provided within the pits.

[0007] Preferably, the pits are arranged in a "~" shape around the outer peripheral surface of the ceramic coating, or the pits are arranged in a similar "~" shape around the outer peripheral surface of the ceramic coating.

[0008] Preferably, the pits are arranged in a "W" shape around the outer peripheral surface of the ceramic coating, or the pits are arranged in a similar "W" shape around the outer peripheral surface of the ceramic coating.

[0009] Preferably, the cross-section of the pit is U-shaped.

[0010] Preferably, the cross-section of the pit is V-shaped.

[0011] Preferably, the cross-section of the pit is an isosceles trapezoid.

[0012] Preferably, there are no restrictions on the number, location, or direction of the notches; one, two, or more notches may be made; the notches may be made at the peak, valley, or other locations of the pits; the notches may be made along the axial direction of the metal roller, along the circumferential direction of the metal roller, or along other directions; that is, any notch that can connect adjacent pits should be considered as a notch.

[0013] Preferably, there are no restrictions on the number, location, or direction of the partitions; one, two, or more partitions may be provided; the partitions may be located at the peak, valley, or other positions of the pit; the partitions may be opened along the axial direction of the metal roller, along the circumferential direction of the metal roller, or along other directions; that is, any partition that can block the pit should be considered as a partition.

[0014] A second aspect of the present invention is to provide a method for preparing an anilox roller as described above, comprising the steps of:

[0015] S1. Using plasma spraying technology, ceramic powder is sprayed onto the outer peripheral surface of the metal roller to form the ceramic coating. After that, the ceramic coating is ground and polished.

[0016] S2. Using laser engraving technology, the outer peripheral surface of the ceramic coating is engraved to form the pit; during laser engraving, the notch is formed after the pit is formed, or / and the partition is formed at the same time as the pit is formed;

[0017] S3. Polish the ceramic coating to obtain the anilox roller.

[0018] Preferably, in step S1, the plasma spraying parameters include: the powder carrier gas is argon and hydrogen; the flow rate of the argon is 150L / min-200L / min; the flow rate of the hydrogen is 20L / min-30L / min; the powder feeding amount is 10g / min-15g / min; the distance between the nozzle of the spray gun and the outer peripheral surface of the metal roller is 10cm-15cm; and the spraying current is 400-600 amperes.

[0019] Preferably, the top surface of the ceramic coating has a serrated structure, the top surface being defined as the top surface during the laser engraving process, and the serrated structure can be observed under a 200x microscope.

[0020] The present invention adopts the above technical solution and has the following technical effects compared with the prior art:

[0021] The anilox roller of the present invention has good material capacity, which not only ensures the coating effect of the slurry, but also facilitates cleaning. The notch design improves the leveling of the slurry, thereby further ensuring the performance of the lithium battery. In addition, the anilox roller also has wear resistance and corrosion resistance, and the mounting shaft design facilitates the cleaning and maintenance of the anilox roller. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the anilox roller in this invention;

[0023] Figure 2 This is a schematic diagram of the "~" shaped groove structure in this invention;

[0024] Figure 3 This is a schematic diagram of the "~" shaped pit in the present invention;

[0025] Figure 4 This is a schematic diagram of the "W"-shaped groove in this invention;

[0026] Figure 5 This is a schematic diagram of the "W"-shaped groove structure in this invention;

[0027] Figure 6 This is a schematic diagram of the "~" shaped groove with a notch in the present invention;

[0028] Figure 7 This is a schematic diagram of the "W"-shaped groove with a notch in the present invention.

[0029] Figure 8 This is a schematic diagram of the "~"-shaped pit with partitions in the present invention;

[0030] Figure 9 This is a schematic diagram of the "W"-shaped pit with partitions in this invention;

[0031] Figure 10 This is a schematic diagram of the "~" shaped groove with notches and partitions in the present invention.

[0032] Figure 11 This is a schematic diagram of the "W"-shaped groove with notches and partitions in this invention; wherein, the reference numerals include:

[0033] Metal roller body 1; mounting shaft 2; ceramic coating 3; groove 31; notch 32; partition 33. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0036] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0037] Example 1

[0038] like Figure 1 As shown, this embodiment provides an anilox roller for coating lithium battery separators, comprising: a metal roller body 1, a pair of mounting shafts 2 disposed at both ends of the metal roller body 1, and a ceramic coating 3 disposed on the outer peripheral surface of the metal roller body 1; a plurality of pits 31 are arranged around the outer peripheral surface of the ceramic coating 3; the plurality of pits 31 are uniformly disposed on the outer peripheral surface of the ceramic coating 3 along the axial direction of the metal roller body 1, the plurality of pits 31 are parallel to each other, and the plurality of pits 31 are perpendicular to the axial direction of the metal roller body 1; at least one notch 32 is provided between adjacent pits 31, and at least one partition 33 is provided in the pit.

[0039] In a preferred embodiment, the groove 31 is arranged in a "~" shape around the outer peripheral surface of the ceramic coating 3.

[0040] In a preferred embodiment, the cross-section of the pit 31 is U-shaped.

[0041] Example 2

[0042] This embodiment provides an anilox roller for coating lithium battery separators, comprising: a metal roller body 1, a pair of mounting shafts 2 disposed at both ends of the metal roller body 1, and a ceramic coating 3 disposed on the outer peripheral surface of the metal roller body 1; a plurality of pits 31 are arranged around the outer peripheral surface of the ceramic coating 3; the plurality of pits 31 are uniformly disposed on the outer peripheral surface of the ceramic coating 3 along the axial direction of the metal roller body 1, the plurality of pits 31 are parallel to each other, and the plurality of pits 31 are perpendicular to the axial direction of the metal roller body 1; at least one notch 32 is provided between adjacent pits 31.

[0043] As a preferred implementation, such as Figure 7 As shown, the pit 31 is W-shaped and surrounds the outer peripheral surface of the ceramic coating 3.

[0044] In a preferred embodiment, the cross-section of the pit 31 is "V" shaped.

[0045] Example 3

[0046] This embodiment provides a method for preparing an anilox roller, the steps of which include:

[0047] S1. Using plasma spraying technology, ceramic powder is sprayed onto the outer peripheral surface of the metal roller 1 to form the ceramic coating 3. Then, the ceramic coating 3 is ground and polished.

[0048] The plasma spraying process parameters include: the powder carrier gas is argon and hydrogen; the argon flow rate is 150L / min-200L / min; the hydrogen flow rate is 20L / min-30L / min; the powder feeding amount is 10g / min-15g / min; the distance between the nozzle of the spray gun and the outer circumferential surface of the metal roller 1 is 10cm-15cm; and the spraying current is 400-600 amperes.

[0049] S2. Using laser engraving technology, the outer peripheral surface of the ceramic coating 3 is engraved to form the pit 31; during laser engraving, the notch 32 is formed after the pit 31 is formed, or / and the partition 33 is formed at the same time as the pit 31 is formed.

[0050] S3. Polish the ceramic coating 3 to obtain the anilox roller.

[0051] The anilox roller of the present invention has good material capacity, which not only ensures the coating effect of the slurry, but also facilitates cleaning. The notch design improves the leveling of the slurry, thereby further ensuring the performance of the lithium battery. In addition, the anilox roller also has wear resistance and corrosion resistance, and the mounting shaft design facilitates the cleaning and maintenance of the anilox roller.

[0052] The above description is merely a preferred embodiment of the present invention and does not limit the implementation and protection scope of the present invention. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. An anilox roller for coating lithium battery separators, comprising: The device comprises a metal roller body (1), a pair of mounting shafts (2) at both ends of the metal roller body (1), and a ceramic coating (3) on the outer peripheral surface of the metal roller body (1); a plurality of pits (31) are arranged around the outer peripheral surface of the ceramic coating (3); characterized in that the plurality of pits (31) are evenly arranged on the outer peripheral surface of the ceramic coating (3) along the axial direction of the metal roller body (1), the plurality of pits (31) are parallel to each other, and the plurality of pits (31) are perpendicular to the axial direction of the metal roller body (1); at least one notch (32) is provided between adjacent pits (31), and at least one partition (33) is provided in the pits (31). The notch (32) can connect the adjacent pit (31), and the partition (33) can block the pit (31).

2. The anilox roller according to claim 1, characterized in that, The groove (31) is arranged in a "~" shape around the outer peripheral surface of the ceramic coating (3), or the groove (31) is arranged in a similar "~" shape around the outer peripheral surface of the ceramic coating (3).

3. The anilox roller according to claim 1, characterized in that, The groove (31) is in a "W" shape surrounding the outer peripheral surface of the ceramic coating (3), or the groove (31) is in a similar "W" shape surrounding the outer peripheral surface of the ceramic coating (3).

4. The anilox roller according to claim 1, characterized in that, The cross-section of the pit (31) is U-shaped.

5. The anilox roller according to claim 1, characterized in that, The cross-section of the pit (31) is "V" shaped.

6. The anilox roller according to claim 1, characterized in that, The cross-section of the pit (31) is an isosceles trapezoid.

7. A method for preparing an anilox roller as described in any one of claims 1-6, characterized in that, step include: S1. Using plasma spraying process, ceramic powder is sprayed onto the outer peripheral surface of the metal roller (1) to form the ceramic coating (3). Then, the ceramic coating (3) is ground and polished. S2. Using laser engraving technology, the outer peripheral surface of the ceramic coating (3) is engraved to form the pit (31); during laser engraving, the notch (32) is formed after the pit (31) is formed, or / and the partition (33) is formed at the same time as the pit (31). S3. Polish the ceramic coating (3) to obtain the anilox roller.

8. The preparation method according to claim 7, characterized in that, In step S1, the plasma spraying process parameters include: the powder carrier gas is argon and hydrogen; the flow rate of the argon is 150L / min-200L / min; the flow rate of the hydrogen is 20L / min-30L / min; the powder feeding amount is 10g / min-15g / min; the distance between the nozzle of the spray gun and the outer circumference of the metal roller (1) is 10cm-15cm; and the spraying current is 400-600 amperes.

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