Coating equipment

Abstract

The utility model discloses coating equipment which comprises at least two coating rollers arranged side by side, and each coating roller comprises at least one reticulate pattern section and smooth roller sections located at the two ends of the reticulate pattern section; in the radial orthographic projection of the coating rollers, the reticulate pattern sections of any two coating rollers are arranged in a staggered manner and are not overlapped. The at least two coating material grooves are arranged side by side, and each coating roller at least corresponds to one coating material groove, so that each reticulate pattern section corresponds to the corresponding coating material groove. When the coating equipment disclosed by the embodiment is used for coating, the coating area on the pole piece can be divided into a plurality of coating areas which are continuously arranged from left to right, and different material liquid can be coated on each coating area; the coating mode is simple and convenient, the coating efficiency is high, the situation that two coating devices are adopted for coating in a relay mode is avoided, meanwhile, the production cost is reduced, and the production benefit is improved.

Description

Technical Field

[0001] The utility model generally relates to the technical field of lithium batteries, and in particular to a coating device. Background Art

[0002] In the related art, in order to apply different slurries to different areas on the electrode, at least two coating devices are used to apply the slurries in a relay manner.

[0003] However, the above coating method is complicated and has high production cost. Utility Model Content

[0004] The present application hopes to provide a coating device that is at least simple and convenient for coating, has high coating efficiency, avoids the use of two coating devices for relay coating, and at the same time, reduces production costs and improves production benefits.

[0005] The utility model provides a coating device, comprising:

[0006] At least two coating rollers are arranged side by side, each of the coating rollers comprising at least one anilox segment and smooth roller segments located at both ends of each anilox segment; in a radial orthographic projection of the coating rollers, the anilox segments of any two coating rollers are staggered and do not overlap;

[0007] At least two coating material slots are arranged side by side, and each coating roller corresponds to at least one coating material slot, so that each anilox segment can adhere to the material liquid from the corresponding coating material slot.

[0008] As an implementable manner, at least part of the coating roller includes at least two roller sections, each of which is spaced apart along the axis of the coating roller, and each of which includes one of the textured segments and the smooth roller segments located at both ends of the textured segment.

[0009] Wherein, two adjacent roller sections are integrally connected with a rotating shaft.

[0010] As an achievable manner, the coating material trough is provided in a one-to-one correspondence with each roller segment, so that the anilox segment of each roller segment can adhere to the material liquid from the corresponding coating material trough.

[0011] As an implementable manner, a blocking portion is provided on the rotating shaft to prevent the liquid carried by one of the two adjacent roller sections in the same coating roller from flowing to the other.

[0012] As an implementation manner, the blocking portion includes at least two circles of protrusions, and the two circles of protrusions are arranged side by side along the axial direction of the coating roller.

[0013] As an implementable manner, in two adjacent roller sections, a frustum is provided on the opposite bottom surfaces of the roller sections, and the diameter of the frustum is smaller than the diameter of the roller section.

[0014] As an implementation method, the surface where the frustum is connected to the rotating shaft is conical.

[0015] As an implementable method, a scraper is also included;

[0016] Each of the coating rollers is provided with a scraper in a one-to-one correspondence; or,

[0017] At least one scraper is provided for each roller segment in a one-to-one correspondence.

[0018] As an implementation method, the scraper further includes an auxiliary scraper.

[0019] Two auxiliary scrapers are arranged between adjacent roller sections, and each auxiliary scraper is in contact with the bottom surface opposite to the roller section one by one; a drainage piece is connected between each auxiliary scraper and the corresponding coating material trough, which is used to return the material scraped off by the auxiliary scraper to the corresponding coating material trough.

[0020] As an implementable manner, the coating trough is an open trough.

[0021] In the above scheme, when the coating equipment of this embodiment is used for coating, the coating area on the electrode can be divided into multiple coating areas arranged continuously from left to right, and different coating liquids can be coated on each coating area; the coating method is simple and convenient, and the coating efficiency is high, avoiding the use of two coating equipment for relay coating, and at the same time, reducing production costs and improving production benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, objects and advantages of the present application will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0023] Figure 1 A schematic structural diagram of a first coating roller provided in an embodiment of the present utility model;

[0024] Figure 2 A schematic structural diagram of a coating tank provided in an embodiment of the present invention;

[0025] Figure 3 A schematic diagram of the arrangement of a first coating roller and a coating trough provided in an embodiment of the present utility model;

[0026] Figure 4 A schematic structural diagram of a second coating roller provided in an embodiment of the present utility model;

[0027] Figure 5 A schematic structural diagram of a third coating roller provided in an embodiment of the present utility model;

[0028] Figure 6A schematic structural diagram of a fourth coating roller provided in an embodiment of the present utility model;

[0029] Coating roller 100, anilox segment 101, smooth roller segment 102;

[0030] First coating roller 11, roller section 111, first roller section 111a, second roller section 111b;

[0031] A second coating roller 12, a first rotating shaft 13, a second rotating shaft 14, a blocking portion 15, and a round table 16;

[0032] Coating tank 200, first coating tank 21, second coating tank 22;

[0033] The scraper 300 , the first scraper 31 , the first left scraper 311 , the first right scraper 312 , the first auxiliary scraper 313 , the second auxiliary scraper 314 , and the second scraper 32 . DETAILED DESCRIPTION

[0034] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the relevant utility model and are not intended to limit the utility model. It should also be noted that, for ease of description, only the portions relevant to the utility model are shown in the accompanying drawings.

[0035] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] At least see Figures 1-6 As shown, the present invention provides an example of a coating device, including: a coating roller 100 and a coating material tank 200.

[0037] The coating apparatus is equipped with at least two side-by-side coating rollers 100. Each coating roller 100 includes at least one textured segment 101, with smooth roller segments 102 positioned at either end. In the radial orthographic projection of the coating rollers 100, the textured segments 101 of any two coating rollers are offset and do not overlap.

[0038] For example, Figure 1 As shown, at least two coating rollers 100 arranged side by side include a first coating roller 11 and a second coating roller 12 , and the first coating roller 11 and the second coating roller 12 are arranged side by side along the front-to-back direction.

[0039] The first coating roller 11 includes two roller sections 111. Each roller section 111 is equipped with a textured segment 101 and smooth roller sections 102 at either end of the textured segment 101. One roller section 111 is positioned closer to the left, and the other roller section 111 is positioned closer to the right, so that the two roller sections 111 are spaced apart along the axis of the first coating roller 11. The roller section 111 on the left is defined as the first roller section 111a, and the roller section 111 on the right is defined as the second roller section 111b. The patterns of the textured segments 101 on the two roller sections 111 can be the same, or they can have different patterns.

[0040] Of course, it is understood that at least some coating rollers include at least two roller sections 111. For example, the first coating roller 11 may include three, four, or five roller sections 111, and the roller sections 111 are spaced apart along the axis of the first coating roller 11. This embodiment is not limited to this.

[0041] The second coating roller 12 has only one roller section. It is provided with a textured segment 101 and smooth roller sections 102 at both ends of the textured segment 101. The pattern of the textured segment 101 on the second coating roller 12 may be different from the patterns of the textured segments 101 on the two roller sections 111.

[0042] In the front-to-back direction, the second coating roller 12 and the first coating roller 11 are projected onto an orthographic projection plane, where the orthographic projection plane is perpendicular to the front-to-back direction. On the orthographic projection plane, the projection of the anilox segment 101 of the second coating roller 12 and the projection of the anilox segment 101 of the first roller section 111a are offset and do not overlap. The projection of the anilox segment 101 of the second coating roller 12 and the projection of the anilox segment 101 of the second roller section 112b are also offset and do not overlap.

[0043] In this way, the projection of the anilox segments 101 of the first roller segment 111a is continuously arranged with the projection of the anilox segments 101 of the second coating roller 12, and the projection of the anilox segments 101 of the second coating roller 12 is continuously arranged with the projection of the anilox segments 101 of the second roller segment 112b. Therefore, during coating, the coating area formed by the anilox segments 101 of the first roller segment 111a, the coating area formed by the anilox segments 101 of the second coating roller 12, and the coating area formed by the anilox segments 101 of the second roller segment 112b are continuously arranged on the electrode piece.

[0044] The coating device is provided with at least two coating troughs 200 arranged side by side, and each coating roller 100 corresponds to at least one coating trough 200 , so that each anilox segment 101 can adhere to the liquid from the corresponding coating trough 200 .

[0045] For example, Figure 2 and Figure 3As shown, at least two coating material slots 200 arranged side by side include a first coating material slot 21 and a second coating material slot 22. The first coating material slot 21 and the second coating material slot 22 are arranged side by side along the front-to-back direction.

[0046] The first coating troughs 21 correspond one-to-one with the roller segments 111 of the first coating roller 11, allowing the textured segments 101 of each roller segment 111 to adhere to the coating liquid from the corresponding first coating trough 21. Specifically, each first roller segment 111a corresponds to one first coating trough 21, and each second roller segment 111b corresponds to one first coating trough 21. The two first coating troughs 21 are spaced apart in the left-right direction.

[0047] The second coating material slot 22 corresponds to the second coating roller 12 , so that the anilox segment 101 of the second coating roller 12 can adhere to the liquid from the second coating material slot 22 .

[0048] The second coating tank 22 and the second coating roller 12 are open tanks, which facilitate adding liquid to the tank. The liquids in each first coating tank 21 can be the same or different; the liquid in the first coating tank 21 and the liquid in the second coating tank 22 can be the same or different.

[0049] With such an arrangement, when the coating equipment of this embodiment is used for coating, the coating area on the electrode can be divided into multiple coating areas arranged continuously from left to right, and different coating liquids can be coated on each coating area; the coating method is simple and convenient, and the coating efficiency is high, avoiding the use of two coating equipment for relay coating, and at the same time, reducing production costs and improving production benefits.

[0050] As an implementation method, the coating device further includes a scraper 300. Each coating roller 100 is provided with a scraper 300 in a one-to-one correspondence; or,

[0051] At least one scraper (300) is provided for each roller section 111 in a one-to-one correspondence.

[0052] like Figure 1 As shown, the coating apparatus includes a first scraper 31 and a second scraper 32. The first scraper 31 and the second scraper 32 are arranged side by side in the front-to-back direction. The first scrapers 31 correspond one-to-one with the roller segments 111 of the first coating roller 11. The length of the first scraper 31 is approximately equal to that of the roller segment, so that the first scraper 31 can scrape off excess liquid carried by the textured segment 101 and the smooth roller segment 102 of each roller segment 111 into the corresponding first coating trough 21. Specifically, each first scraper 31 corresponding to each first roller segment 111a is defined as the first left scraper 311; each first scraper 31 corresponding to each second roller segment 111b is defined as the first right scraper 312.

[0053] The second scraper 32 corresponds to the second coating roller 12 , and the length of the second scraper 32 is substantially equal to that of the second coating roller 12 , so as to scrape off the excess liquid carried by the anilox segment 101 and the smooth roller segment 102 of the second coating roller 12 into the second coating material tank 22 .

[0054] Of course, it is understood that the first left scraper 311 and the first right scraper 312 are integrally formed, that is, the first scraper 31 is a single piece, and the first scraper 31 contacts the first roller segment 111a and the second roller segment 111b. Notches are provided in the corresponding areas between the first scraper 31 and the first and second roller segments 111a and 111b to avoid material waste and reduce production costs.

[0055] In addition, a first rotating shaft 13 is provided on the first roller section 111a and the second roller section 111b, and a second rotating shaft 14 is provided on the second coating roller 12. The first rotating shaft 13 rotates to drive the first roller section 111a and the second roller section 111b to rotate, and the second rotating shaft 14 rotates to drive the second coating roller 12 to rotate.

[0056] For the first roller section 111a and the second roller section 111b, when liquid adheres to the first roller section 111a and the corresponding first coating trough 21, and liquid adheres to the second roller section 111b and the corresponding first coating trough 21, the liquid on the first roller section 111a flows to the second roller section 111b through the first rotating shaft 13, or the second roller section 111b and the corresponding first coating trough 21; the liquid on the second roller section 111b flows to the first roller section 111a through the first rotating shaft 13, or the first roller section 111a and the corresponding first coating trough 21, so that the liquid on the first roller section 111a and the liquid on the second roller section 111b contaminate each other, thereby affecting the coating effect of the coating area on the substrate.

[0057] Based on this, in order to prevent the slurry on the first roller section 111a and the slurry on the second roller section 111b from contaminating each other, this embodiment adopts the following method to solve the problem:

[0058] Optionally, a blocking portion 15 is provided on the first rotating shaft 13 to prevent the liquid carried by one of two adjacent roller sections 111 in the same coating roller 100 from flowing to the other.

[0059] like Figure 4 As shown, the blocking portion 15 includes at least two rings of protrusions disposed along the circumference of the first rotating shaft 13 between the first roller segment 111a and the second roller segment 111b. Each ring of protrusions is arranged side by side along the axial direction of the first coating roller 11. The protrusions prevent contamination between the liquid on the first roller segment 111a and the liquid on the second roller segment 111b.

[0060] Of course, it is understandable that the blocking portion 15 may also have other structures. For example, the blocking portion 15 may have a labyrinth structure to prevent the slurry on the first roller segment 111 a and the slurry on the second roller segment 111 b from contaminating each other.

[0061] Optionally, the first scraper 31 further includes a first auxiliary scraper 313. Two first auxiliary scrapers 313 are provided between two adjacent roller segments 111, and each first auxiliary scraper 313 contacts the bottom surface of the roller segment 111 in a one-to-one correspondence.

[0062] like Figure 5 As shown, one first auxiliary scraper 313 contacts the bottom surface of the first roller segment 111a facing the second roller segment 111b to scrape off the liquid carried by the bottom surface; the other first auxiliary scraper 313 contacts the bottom surface of the second roller segment 111b facing the first roller segment 111a to scrape off the liquid carried by the bottom surface. This can prevent the liquid on the first roller segment 111a and the liquid on the second roller segment 111b from contaminating each other.

[0063] In addition, a drainage piece is connected between a first auxiliary scraper 313 and the first coating trough 21 corresponding to the first roller section 111a, which is used to return the liquid scraped off by the first auxiliary scraper 313 to the first coating trough 21; a drainage piece is connected between another first auxiliary scraper 313 and the first coating trough 21 corresponding to the second roller section 111b, which is used to return the liquid scraped off by the first auxiliary scraper 313 to the first coating trough 21.

[0064] Optionally, a truncated cone 16 is provided on the bottom surface of each roller segment 111 between two adjacent roller segments 111, and the diameter of the truncated cone 16 is smaller than that of the roller segment 111. The first scraper 31 further includes a second auxiliary scraper 314, which contacts the outer circumference of the truncated cone 16.

[0065] like Figure 6 As shown, a circular platform 16 is provided on the bottom surface of the first roller segment 111a facing the second roller segment 111b. This circular platform 16 prevents the first roller segment 111a from carrying liquid toward the bottom surface of the second roller segment 111b. A circular platform 16 is provided on the bottom surface of the second roller segment 111b facing the first roller segment 111a. This circular platform 16 prevents the second roller segment 111b from carrying liquid toward the bottom surface of the first roller segment 111a. A second auxiliary scraper 314 between the first left scraper 311 and the first right scraper 312 contacts the outer circumferences of the two circular platforms to scrape off any liquid carried on the circular platforms 16.

[0066] In this way, the slurry on the first roller segment 111 a and the slurry on the second roller segment 111 b can be prevented from being contaminated with each other.

[0067] Furthermore, if Figure 6As shown, the bottom surface of the cone 16 on the first roller segment 111a facing the second roller segment 111b is a conical surface, and the bottom surface of the cone 16 on the second roller segment 111b facing the first roller segment 111a is a conical surface, which helps the liquid carried by the bottom surface of the cone 16 to flow back to the corresponding first coating tank 21 under the action of gravity, and further inhibits the liquid on the first roller segment 111a and the liquid on the second roller segment 111b from contaminating each other.

[0068] Of course, it can be understood that in some embodiments, the bottom surface of the first roller segment 111a facing the second roller segment 111b is a conical surface, and the bottom surface of the second roller segment 111b facing the first roller segment 111a is a conical surface. At the current moment, the bottom surface of the first roller segment 111a facing the second roller segment 111b and the bottom surface of the second roller segment 111b facing the first roller segment 111a are not provided with the above-mentioned frustum 16.

[0069] It should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used above to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0070] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the utility model disclosed herein is not limited to the technical solutions formed by a specific combination of the aforementioned technical features, but also encompasses other technical solutions formed by any combination of the aforementioned technical features or their equivalents without departing from the concept of the utility model. For example, a technical solution formed by replacing the aforementioned features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A coating device, characterized in that, include: At least two coating rollers (100) are arranged side by side, each of the coating rollers (100) comprises at least one anilox segment (101) and smooth roller segments (102) located at both ends of each anilox segment (101); in a radial orthographic projection of the coating rollers (100), the anilox segments (101) of any two coating rollers (100) are staggered and do not overlap; At least two coating material troughs (200) are arranged side by side, and each coating roller (100) corresponds to at least one coating material trough (200), so that each anilox segment (101) can adhere to the liquid from the corresponding coating material trough (200).

2. The coating device according to claim 1, characterized in that At least part of the coating roller (100) comprises at least two roller sections (111), each of the roller sections (111) being arranged at intervals along the axial direction of the coating roller (100), and each of the roller sections (111) comprising one of the textured sections (101) and the smooth roller sections (102) located at both ends of the textured section (101). Wherein, two adjacent roller sections (111) are integrally connected to a rotating shaft.

3. The coating device according to claim 2, characterized in that Each roller section (111) is provided with a coating material trough (200) in correspondence with each other, so that the mesh section (101) of each roller section (111) can adhere to the material liquid from the corresponding coating material trough (200).

4. The coating device according to claim 2, characterized in that A blocking portion (15) is provided on the rotating shaft to prevent the liquid carried by one of two adjacent roller sections (111) in the same coating roller (100) from flowing to the other.

5. The coating device according to claim 4, characterized in that The blocking portion (15) comprises at least two circles of protrusions, and the two circles of protrusions are arranged side by side along the axial direction of the coating roller (100).

6. The coating device according to claim 2, characterized in that In two adjacent roller sections (111), a truncated cone (16) is provided on the bottom surfaces of the roller sections (111) facing each other, and the diameter of the truncated cone (16) is smaller than the diameter of the roller section (111).

7. The coating device according to claim 6, characterized in that The surface where the frustum (16) is connected to the rotating shaft is conical.

8. The coating device according to any one of claims 2 to 5, characterized in that: Also included is a scraper (300); Each coating roller (100) is provided with a scraper (300) in a one-to-one correspondence; or, At least one scraper (300) is provided in one-to-one correspondence with each roller section (111).

9. The coating device according to claim 8, characterized in that The scraper (300) further includes an auxiliary scraper, Two auxiliary scrapers are provided between adjacent roller sections (111), and each of the auxiliary scrapers is in one-to-one contact with a bottom surface opposite to the roller section (111); A drainage piece is connected between each auxiliary scraper and the corresponding coating material tank (200), and is used to return the liquid scraped off by the auxiliary scraper to the corresponding coating material tank (200).

10. The coating device according to claim 1, characterized in that The coating trough (200) is an open trough.

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