CN216440957U - Gravure roller for spraying and device thereof - Google Patents
Gravure roller for spraying and device thereof Download PDFInfo
- Publication number
- CN216440957U CN216440957U CN202121979881.8U CN202121979881U CN216440957U CN 216440957 U CN216440957 U CN 216440957U CN 202121979881 U CN202121979881 U CN 202121979881U CN 216440957 U CN216440957 U CN 216440957U
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- China
- Prior art keywords
- methyl pyrrolidone
- gravure
- gravure roll
- spraying
- roller
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- 238000005507 spraying Methods 0.000 title claims abstract description 64
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims abstract description 84
- 239000007788 liquid Substances 0.000 claims description 24
- 239000007921 spray Substances 0.000 claims description 14
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 239000011888 foil Substances 0.000 claims description 5
- 238000007790 scraping Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 abstract description 14
- 238000001035 drying Methods 0.000 abstract description 7
- 238000009792 diffusion process Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 6
- 239000002002 slurry Substances 0.000 description 6
- 239000012528 membrane Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000001502 supplementing effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000009469 supplementation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Coating Apparatus (AREA)
Abstract
The utility model discloses a gravure roller for spraying and a device thereof, wherein the gravure roller comprises: a gravure roller; and the spraying areas are longitudinally or transversely arranged on the surface of the gravure roller at equal intervals, and are internally provided with the N-methyl pyrrolidone. According to the utility model, a plurality of spraying areas with N-methyl pyrrolidone inside are equidistantly arranged on the surface of the gravure roller at intervals, so that the N-methyl pyrrolidone is coated on the film area of the single-sided pole piece at intervals, on one hand, the spraying amount is relatively reduced, on the other hand, the N-methyl pyrrolidone is diffused towards the film area which is not sprayed with the N-methyl pyrrolidone on two sides by using the diffusion of the N-methyl pyrrolidone, the film area which is not sprayed with the film area can also cover the N-methyl pyrrolidone, the N-methyl pyrrolidone spraying amount is controlled to be reasonable, the drying efficiency of the film area of the pole piece is not influenced, and the rolling phenomenon of the single-sided pole piece during rolling can be eliminated.
Description
Technical Field
The utility model belongs to the technical field of lithium ion battery manufacturing, and particularly relates to a gravure roller for spraying and a device thereof.
Background
The lamination process becomes a large forming direction after the winding process, but in order to save resources and reduce waste, the top layer and the bottom layer of the lamination process are single-side coated pole pieces, but the single-side coated pole pieces are rolled in the rolling process, so that the pole pieces are broken, cannot be rolled, the internal stress cannot be offset, and the subsequent process is greatly influenced, so that the pole piece rolling phenomenon must be eliminated.
In the prior art, a gravure roller is adopted to carry out spraying treatment on a single-side coating pole piece by NMP (N-methyl pyrrolidone) or other solvents, but the spraying amount of the gravure roller is difficult to control, a scraper cannot quantitatively remove the NMP, the spraying amount is large, the drying efficiency is influenced, and the rebound of a pole piece film area is serious; the spraying amount is less, and the rolling phenomenon cannot be eliminated.
SUMMERY OF THE UTILITY MODEL
Based on the problems existing in the background art, the present invention aims to provide a gravure roll for spraying and a device thereof, wherein a plurality of spraying areas are equidistantly arranged on the surface of the gravure roll, so that on one hand, the spraying amount can be relatively reduced, on the other hand, N-methyl pyrrolidone is coated on the film area of the corresponding single-sided pole piece by the spraying areas, and the redundant N-methyl pyrrolidone in the sprayed film area can be diffused to the film area which is not sprayed with N-methyl pyrrolidone on both sides, so that the film area which is not sprayed with N-methyl pyrrolidone can also cover N-methyl pyrrolidone, and finally, the pole piece rolling phenomenon can be eliminated.
In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:
the utility model provides a gravure roller for spraying, which comprises:
a gravure roller;
and the spraying areas are longitudinally or transversely arranged on the surface of the gravure roller at equal intervals, and the spraying areas are internally provided with N-methyl pyrrolidone.
As an improvement of the gravure roller, the width of the spraying area is larger than 100mm, and the distance between every two adjacent spraying areas is 10-50 mm. The application will set the width of the spray area to be greater than 100mm, depending on the diffusion coefficient of the N-methylpyrrolidone, the spraying area can well diffuse to the area which is not sprayed with the N-methyl pyrrolidone, and the distance between the adjacent spraying areas is set to be 10-50 mm, so that on one hand, the amount of the N-methyl pyrrolidone can be relatively reduced, and on the other hand, in the interval, the N-methyl pyrrolidone in the film area sprayed with the N-methyl pyrrolidone can diffuse to the film area not sprayed with the N-methyl pyrrolidone, so that the film area not sprayed with the N-methyl pyrrolidone can also cover the needed N-methyl pyrrolidone, and the rolling phenomenon of the single-sided pole piece during rolling is eliminated.
As an improvement of the gravure roller, the gravure roller is of a hollow structure, and a liquid supply cavity is arranged in the gravure roller and used for supplementing the N-methylpyrrolidone consumed by the spraying area. The spraying area sprays the N-methyl pyrrolidone on the single-side pole piece, so that the consumption of the N-methyl pyrrolidone is caused, and in order to continuously work and reduce the time spent on manual liquid supplementing, a liquid supply cavity is arranged in the gravure roller, and the liquid supplementing is carried out on the spraying area by the liquid supply cavity, so that the efficiency is improved, and the labor cost is saved.
As an improvement of the gravure roller, the spraying area is a reticular concave hole formed by the concave surface of the gravure roller, and the concave hole is used for accommodating the N-methyl pyrrolidone. For setting to the recess, will the spraying district sets up to the shrinkage pool, N-methyl pyrrolidone that holds that can be better prevents that the weeping from appearing in N-methyl pyrrolidone, and the shrinkage pool can make the spraying more even that distributes at the N-methyl pyrrolidone of membrane district simultaneously.
The improvement of the gravure roll is characterized in that the depth of the concave hole is 20-200 mu m, and the volume of the concave hole is 20-300 mL. In practice, the depth and the volume of the concave hole can be flexibly adjusted according to needs, the amount of the N-methyl pyrrolidone carried in the spraying area can be actually transferred to the single-side pole piece, the transfer rate is related, and the required depth of the specific spraying area is calculated according to the transfer rate and the amount of the N-methyl pyrrolidone which can actually eliminate the wrinkles of the single-side pole piece. In the application, the depth of the concave hole is 20-200 mu m, and the volume is 20-300 mL, so that the N-methyl pyrrolidone amount required by the single-sided pole piece can be met.
The present invention also provides a gravure roller device, comprising:
the gravure roller in any scheme is used for spraying the N-methyl pyrrolidone to a film area of a single-sided pole piece;
the compression roller is arranged in parallel with the gravure roller and is used for pressing the single-side pole piece to the gravure roller;
and the cutting edge of the scraper is attached to the surface of the gravure roller and is used for scraping off a part of the N-methyl pyrrolidone. Scraping the excess N-methyl pyrrolidone on the surface of the gravure cylinder to prevent the excess N-methyl pyrrolidone sprayed on the film area.
As an improvement of the gravure roll apparatus of the present invention, the press roll is disposed above the gravure roll.
As an improvement of the gravure roll device of the present invention, the blade of the doctor blade is parallel to the axis of the gravure roll. The arrangement can ensure that the scraper is more fully attached to the surface of the gravure roller, so that the N-methylpyrrolidone is scraped more cleanly by the scraper.
As an improvement of the gravure roller device, the gravure roller device further comprises a liquid supply tank, the liquid supply tank is arranged below the gravure roller, and the horizontal surface of the N-methylpyrrolidone in the liquid supply tank is in contact with the bottom end of the gravure roller. By additionally arranging the liquid supply tank, the N-methyl pyrrolidone can be automatically supplemented to the spraying area all the time, manual supplementation is not needed, and meanwhile, the device can work all the time, so that the working efficiency is improved.
The single-sided pole piece is a current collector with a single side coated with active slurry, wherein one side coated with the active slurry comprises a membrane area and hollow foil areas arranged on two sides of the membrane area.
The utility model at least comprises the following beneficial effects:
according to the method, the plurality of spraying areas with the N-methyl pyrrolidone inside are arranged on the surface of the gravure roller at equal intervals, so that the N-methyl pyrrolidone is coated on the film area of the single-sided pole piece at intervals, the spraying amount is relatively reduced, and the N-methyl pyrrolidone is diffused towards the film area which is not sprayed to v on two sides by using the diffusion of the N-methyl pyrrolidone, so that the film area which is not sprayed can also cover the N-methyl pyrrolidone, the spraying amount of the N-methyl pyrrolidone is controlled to be reasonable, the drying efficiency of the film area of the pole piece is not influenced, and the rolling phenomenon of the single-sided pole piece during rolling can be eliminated.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model.
FIG. 1 is a schematic view of a gravure roll with a longitudinally disposed spray zone in accordance with the present invention;
FIG. 2 is a schematic view of a gravure roll with a transversely disposed spray zone according to the present invention;
FIG. 3 is an enlarged view of a recess in a spray area of the present invention;
fig. 4 is a schematic structural diagram of a gravure roll apparatus according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a gravure roll apparatus according to another embodiment of the present invention;
FIG. 6 is a schematic view of a single-sided pole piece of the present invention;
the labels in the figure are: 1-gravure roller; 11-gravure roll; 12-a spraying area; 121-concave holes; 2-a press roll; 3, a scraper; 4-single-sided pole piece; 41-membrane region; 42-empty foil areas; 5-a liquid supply tank; 6-N-methylpyrrolidone.
Detailed Description
The present invention will be further described below with reference to the accompanying drawings for easier understanding, but the present invention can be implemented in various forms, and is not limited to the embodiments described herein and does not constitute any limitation to the present invention. As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. The description and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. The appearances of "a plurality" in this application are intended to mean more than two (including two).
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", horizontal ", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
The gravure roller 1 and the device thereof for spraying the N-methyl pyrrolidone 6 described in the embodiment of the application are suitable for a single-sided pole piece 4 to be rolled, and the single-sided pole piece 4 comprises a single-sided positive pole piece and a single-sided negative pole piece. Wherein,
the single-sided positive pole piece comprises a positive pole current collector and a positive pole active layer arranged on any side of the positive pole current collector, wherein the positive pole active layer is formed by coating positive pole active slurry on the positive pole current collector through drying and rolling.
The single-sided negative pole piece comprises a negative pole current collector and a negative pole active layer arranged on any side of the negative pole current collector, wherein the negative pole active layer is formed by coating negative pole active slurry on the negative pole current collector through drying and rolling.
As shown in fig. 6, one side of the single-sided electrode sheet 4 provided with the active material layer includes a film region 41 and empty foil regions 42 disposed on both sides of the film region 41, where the film region 41 is an area where the current collector is coated with the active slurry, and the empty foil regions 42 are areas where the current collector is not coated with the active slurry.
As shown in fig. 4, the present embodiment provides a gravure roll 1 apparatus including: a gravure roller 1 for spraying N-methyl pyrrolidone 6, a compression roller 2 and a scraper 3. The compression roller 2 is rotatably arranged above the gravure roller 1, the axial direction of the compression roller 2 is parallel to the axial direction of the gravure roller 1, the compression roller 2 presses the film area 41 of the single-sided pole piece 4 to the gravure roller 1, and the gravure roller 1 rotates to spray the N-methyl pyrrolidone 6 on the surface of the film area 41; and the scraper 3 is used for scraping a part of the N-methylpyrrolidone 6, and the cutting edge of the scraper 3 is attached to the surface of the gravure roller 11 and is parallel to the axial direction of the gravure shaft.
As shown in fig. 1, in some embodiments, a gravure roll 1 for spray coating includes: a gravure roll 11 and a spray zone 12. The gravure roller 11 is of a cylindrical hollow structure, a plurality of spraying areas 12 are transversely arranged on the surface of the gravure roller 11 at equal intervals, and the spraying areas 12 are internally provided with N-methyl pyrrolidone 6. The spraying areas 12 with the N-methyl pyrrolidone 6 are equidistantly and alternately arranged on the surface of the gravure roll 1, so that the N-methyl pyrrolidone 6 is alternately coated on the film area 41 of the single-sided pole piece 4, the spraying amount is relatively reduced, meanwhile, the N-methyl pyrrolidone 6 is diffused towards the film area 41 which is not coated on the N-methyl pyrrolidone 6 at two sides by using the diffusion of the N-methyl pyrrolidone 6, the film area 41 which is not coated can also cover the N-methyl pyrrolidone 6, the spraying amount of the N-methyl pyrrolidone 6 is controlled to be reasonable, the drying efficiency of the pole piece film area 41 is not influenced, and the rolling phenomenon of the single-sided pole piece 4 can be eliminated.
The diffusion coefficient of the N-methylpyrrolidone 6 is different for the diffusion ranges of the pole pieces with different thicknesses, and in the embodiment, the distance between the adjacent spraying areas 12 is 10-50 mm. The width of the spray area 12 is greater than 100 mm. The width of the spraying area 12 is larger than 100mm, the width of the spraying area 12 corresponding to the film area 41 capable of being coated is also larger than 100mm, the redundant N-methyl pyrrolidone 6 sprayed on the film area 41 can be diffused to the film areas 41 which are not sprayed on the N-methyl pyrrolidone 6 on two sides, the distance between the adjacent spraying areas 12 is 10-50 mm, the diffused N-methyl pyrrolidone 6 can cover the film area 41 which is not sprayed on the N-methyl pyrrolidone 6, and the required N-methyl pyrrolidone 6 amount can be met. Not only ensures the drying efficiency of the pole piece film area 41, but also eliminates the rolling phenomenon of the single-sided pole piece 4.
In some embodiments, the spraying areas 12 are concave-meshed concave holes 121 formed in the surface of the gravure roll 11, and the concave holes 121 are used for accommodating the N-methylpyrrolidone 6. The concave holes 121 can be engraved by laser, and the laser is applied to the surface of the gravure cylinder 11 and rotates along the gravure cylinder 11 for one circle, so that a transversely arranged spraying area 12 can be obtained.
In practice, the depth and the volume of the concave hole 121 can be flexibly adjusted according to needs, the amount of the N-methyl pyrrolidone 6 carried by the spraying area 12 can be actually transferred to the single-sided pole piece 4, a transfer rate is involved in the process, the transfer rate is 80-95%, and the required depth of the spraying area 12 is calculated according to the transfer rate and the amount of the N-methyl pyrrolidone 6 which can actually eliminate wrinkles of the single-sided pole piece 4. Preferably, the depth of the concave hole 121 is 20 to 200 μm, and the volume is 20 to 300 mL. For example, as shown in FIG. 3, each recess 121 has a depth of 80 μm, a volume of 100mL, a transfer rate of 90%, and a transfer amount to the pole piece of 90 mL.
In some embodiments, the gravure cylinder 11 is a hollow structure with a liquid supply chamber disposed therein to replenish the consumption of N-methylpyrrolidone 6 by the spray zone 12. Because the spraying area 12 sprays the N-methyl pyrrolidone 6 on the single-sided pole piece 4, the consumption of the N-methyl pyrrolidone 6 can be caused, and in order to continuously work and reduce the time spent on manual liquid supplement, a liquid supply cavity is arranged inside the gravure roller 11, and the liquid supplement is carried out on the spraying area 12 by the liquid supply cavity, so that the efficiency is improved, and the labor cost is saved.
In some embodiments, the surface of the gravure cylinder 11 is provided with a plurality of spraying areas 12 at equal intervals longitudinally, the spraying areas 12 are concave holes 121 recessed on the surface of the gravure cylinder 11, and the concave holes 121 are used for accommodating the N-methylpyrrolidone 6. The concave hole 121 can be engraved by laser, and the concave hole can be engraved by laser along the axial direction parallel to the gravure cylinder 11 from the surface of any end of the gravure cylinder 11 to the other end of the gravure cylinder 11, so that a longitudinally arranged spraying area 12 can be obtained.
In some embodiments, the gravure roller 1 apparatus further includes a liquid supply tank, the liquid supply tank is located below the gravure roller 1, the size of the liquid supply tank is larger than that of the gravure roller 1, the cavity of the liquid supply tank contains N-methyl pyrrolidone 6, the bottom end of the gravure roller 1 is located in the liquid supply tank and contacts with the horizontal surface of the N-methyl pyrrolidone 6, and the concave hole 121 of the spraying area 12 can automatically replenish the N-methyl pyrrolidone 6 from the liquid supply tank, so that the gravure roller 1 can continuously spray the N-methyl pyrrolidone 6 on the film area 41 of the single-sided pole piece 4 without manually replenishing the N-methyl pyrrolidone 6.
The foregoing is a more detailed description of the present application in connection with specific embodiments thereof, and it is not intended that the present application be limited to the specific embodiments thereof. For those skilled in the art to which the present application pertains, a plurality of simple deductions or replacements can be made without departing from the concept of the present application.
Claims (10)
1. A gravure roll for spray coating, comprising:
a gravure roller;
and the spraying areas are longitudinally or transversely arranged on the surface of the gravure roller at equal intervals, and the spraying areas are internally provided with N-methylpyrrolidone.
2. The gravure roll of claim 1 wherein said spray lands have a width greater than 100mm and a spacing between adjacent spray lands is between 10 and 50 mm.
3. The gravure roll according to claim 1, wherein the gravure roll is hollow and has a liquid supply chamber therein for replenishing the N-methylpyrrolidone consumed by the spray coating zone.
4. The gravure roll of claim 1 wherein said spray areas are a network of depressions formed by depressions in the surface of said gravure roll, said depressions adapted to receive said N-methyl pyrrolidone.
5. The gravure roll according to claim 4, wherein the recesses have a depth of 20 to 200 μm and a volume of 20 to 300 mL.
6. A gravure roll apparatus, comprising:
the gravure roll according to any one of claims 1 to 5, which is used for spraying N-methyl pyrrolidone to a film area of a single-sided sheet;
the compression roller is arranged in parallel with the gravure roller and is used for pressing the single-side pole piece to the gravure roller;
and the cutting edge of the scraper is attached to the surface of the gravure roller and is used for scraping off a part of the N-methyl pyrrolidone.
7. The gravure roll arrangement of claim 6 wherein the pressure roll is disposed above the gravure roll.
8. The gravure roll arrangement of claim 6 wherein the blade edge of the doctor blade is parallel to the axis of the gravure roll.
9. The gravure roll apparatus of claim 6 further comprising a liquid supply reservoir below the gravure roll, the level of N-methylpyrrolidone in the liquid supply reservoir being in contact with the bottom end of the gravure roll.
10. The gravure roll device according to claim 6, wherein the single-sided sheet is a current collector coated with active paste on one side, wherein the side coated with the active paste comprises a film region and empty foil regions disposed on both sides of the film region.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121979881.8U CN216440957U (en) | 2021-08-23 | 2021-08-23 | Gravure roller for spraying and device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121979881.8U CN216440957U (en) | 2021-08-23 | 2021-08-23 | Gravure roller for spraying and device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216440957U true CN216440957U (en) | 2022-05-06 |
Family
ID=81348139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121979881.8U Active CN216440957U (en) | 2021-08-23 | 2021-08-23 | Gravure roller for spraying and device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216440957U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115957926A (en) * | 2022-09-02 | 2023-04-14 | 浙江宇狮包装材料有限公司 | Communicating micro-groove coating roller for feeding materials from inner cavity |
-
2021
- 2021-08-23 CN CN202121979881.8U patent/CN216440957U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115957926A (en) * | 2022-09-02 | 2023-04-14 | 浙江宇狮包装材料有限公司 | Communicating micro-groove coating roller for feeding materials from inner cavity |
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