CN209866498U - Non-full-coverage diaphragm coating device - Google Patents
Non-full-coverage diaphragm coating device Download PDFInfo
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- CN209866498U CN209866498U CN201920590272.XU CN201920590272U CN209866498U CN 209866498 U CN209866498 U CN 209866498U CN 201920590272 U CN201920590272 U CN 201920590272U CN 209866498 U CN209866498 U CN 209866498U
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Abstract
The utility model provides a non-all standing diaphragm coating unit relates to lithium battery processing technology field, has solved the technical problem that the non-all standing diaphragm coating unit structure that exists is complicated, with high costs among the prior art. The non-full-coverage diaphragm coating device comprises a micro gravure roller and a stock bin, wherein the stock bin is arranged on one side of the micro gravure roller, a stock bin outlet is formed in the stock bin, and slurry in the stock bin can directly flow into a groove hole structure on the circumferential surface of the micro gravure roller through the stock bin outlet. The utility model is used for battery diaphragm's coating.
Description
Technical Field
The utility model belongs to the technical field of the lithium cell processing technique and specifically relates to a non-all standing diaphragm coating unit is related to.
Background
In order to improve the safety of the lithium battery, inorganic nanoparticles with stable performance are mostly coated on a polypropylene or polyethylene microporous membrane to improve the thermal stability of the microporous membrane in the prior art, and a full-coverage polymer bonding layer is coated to improve the heat resistance of the diaphragm and the bonding force between the diaphragm and a lithium battery pole piece. However, after the polymer and the electrolyte form a gel layer, the conductivity of the electrolyte is reduced to 10%, which is not beneficial to the conduction of lithium ions, increases the internal resistance of the lithium battery, and influences the rate discharge and cycle performance of the lithium battery. The lithium battery not only needs good thermal stability and bonding force between the diaphragm and the electrode, but also needs quick charging performance, so that the mode of coating a glue layer in a non-full-covering mode is realized, the effective transmission of lithium ions can be realized in a polymer-free glue point hole area, the lithium ion conductivity of the diaphragm is improved, and the charging and discharging performance of the lithium battery is improved.
The applicant has found that the prior art has at least the following technical problems:
the existing non-full-coverage diaphragm coating device has the disadvantages of complex structure, large investment and difficult combination with the existing production line.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a non-all standing diaphragm coating unit has solved the technical problem that the non-all standing diaphragm coating unit structure that exists is complicated, with high costs among the prior art. The utility model provides a plurality of technical effects that preferred technical scheme among a great deal of technical scheme can produce see the explanation below in detail.
In order to achieve the above purpose, the utility model provides a following technical scheme:
the utility model provides a pair of non-full-covering diaphragm coating unit, including little gravure roller and feed bin, wherein, the feed bin sets up one side of little gravure roller, be provided with the feed bin export on the feed bin, thick liquids in the feed bin can pass through the direct inflow of feed bin export in little gravure roller circumference recess pore structure on the surface.
Preferably, the non-full-coverage membrane coating device further comprises a scraping device, and the scraping device is used for removing the slurry on the surface of the micro gravure roll.
Preferably, the scraping device comprises a scraper blade for removing the surface slurry of the micro gravure roll.
Preferably, the bin is a scraping hopper, and the part of the scraping hopper, which is in contact with the micro gravure roll, forms the scraping device.
Preferably, the groove hole structures comprise large groove hole structures and small groove hole structures, and the large groove hole structures and the small groove hole structures are uniformly distributed at intervals along the axis direction of the micro gravure roller and are uniformly distributed at intervals along the circumferential direction of the micro gravure roller.
Preferably, the diameter of the big groove hole structure is larger than that of the small groove hole structure on the same cross section, and the depth of the big groove hole structure is larger than or smaller than or equal to that of the small groove hole structure; or the diameter of the big groove hole structure is equal to that of the small groove hole structure on the same cross section, and the depth of the big groove hole structure is greater than or equal to that of the small groove hole structure.
Preferably, the micro gravure roller is provided with an axial connecting wire slot, and the axial connecting wire slot penetrates through the centers of all groove hole structures in the same row along the axial direction of the micro gravure roller; and/or a circumferential connecting wire groove is arranged on the micro gravure roller and penetrates through the centers of all groove hole structures in the same circle along the circumferential direction of the micro gravure roller; and/or a spiral connecting wire groove is arranged on the micro gravure roller, is in a spiral line shape and penetrates through the centers of all groove hole structures in the same row.
Preferably, the diameter range of the micro gravure roller is 30 mm-500 mm; the depth range of the groove hole structure on the surface of the micro gravure roller is 10-220 mu m; the diameter range of the groove hole structure of the micro gravure roller is 30-500 mu m.
Preferably, each row of groove hole structures along the axis direction of the micro gravure roll are distributed in a spiral shape.
Preferably, the micro gravure roller is a roller with a ceramic material sprayed on the surface.
The utility model provides a non-all standing diaphragm coating unit, feed bin and little gravure roller direct cooperation, in the thick liquids that flows from the feed bin export of feed bin can directly flow in the groove structure on the little gravure roller, simple structure, the commonality is strong, convenient operation to the technical problem that the non-all standing diaphragm coating unit structure that exists is complicated, with high costs among the prior art has been solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a non-full-coverage membrane coating apparatus provided in an embodiment of the present invention;
fig. 2 is a schematic front view of a micro gravure roller according to an embodiment of the present invention (the diameter of the same cross section of the large groove hole structure is different from that of the small groove hole structure);
fig. 3 is another schematic front view of the micro gravure roller according to the embodiment of the present invention (the diameter of the same cross section of the large groove hole structure and the small groove hole structure is different, and the groove hole structure is in a spiral shape along the axis direction of the micro gravure roller);
fig. 4 is another schematic front view of the micro gravure roll according to the embodiment of the present invention (the diameter of the same cross section of the large groove hole structure and the small groove hole structure is the same);
fig. 5 is another schematic front view of the micro gravure roller according to the embodiment of the present invention (the diameter of the same cross section of the large groove hole structure and the small groove hole structure is the same, and the groove hole structure is in a spiral shape along the axial direction of the micro gravure roller);
fig. 6 is a schematic structural diagram of an axial connection wire slot and a circumferential connection wire slot on a micro gravure roller provided by an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a circumferential connecting wire groove on the micro gravure roller provided by the embodiment of the present invention (the groove hole structure is in a spiral shape along the axial direction of the micro gravure roller);
fig. 8 is a schematic structural diagram of an axial connection wire slot, a circumferential connection wire slot and a spiral connection wire slot on a micro gravure roller according to an embodiment of the present invention.
FIG. 1-micro gravure roll; 2-a storage bin; 21-bin outlet; 3-groove hole structure; 31-small groove hole structure; 32-large groove hole structure; 4-a scraper; 5-a separator; 6-axial connecting wire slots; 7-circumferentially connecting wire slots; 8-spiral connecting wire slot.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1-8, the utility model provides a non-all standing diaphragm coating unit, including little gravure roller 1 and feed bin 2, wherein, feed bin 2 sets up in one side of little gravure roller 1, is provided with feed bin export 21 on the feed bin 2, and the thick liquids in the feed bin 2 can directly flow in little gravure roller 1 circumference recess pore structure 3 on the surface through feed bin export 21. In the prior art, the stock bin 2 is not directly matched with the micro gravure roller 1, and the structure such as a material conveying roller is adopted to convey the slurry in the stock bin 2 to the micro gravure roller 1, so that the structure is complex and the cost is high; and the utility model provides a non-all standing diaphragm coating unit, feed bin 2 and little gravure roller 1 direct cooperation, from the feed bin of feed bin 2 export 21 the thick liquids of outflow can directly flow in little gravure roller 1 on groove structure 3 in, simple structure, and easily with the combination of producing the line, the commonality is strong, convenient operation. In addition, the micro gravure roll 1 can be a roller with the surface sprayed with a ceramic material, and is consistent with the prior art system and convenient to implement.
As an optional implementation manner of the embodiment of the present invention, the non-full-coverage diaphragm coating apparatus further includes a scraping device, and the scraping device is configured to remove the slurry on the surface of the micro gravure roller 1. Referring to fig. 1, the scraping device comprises a scraper 4, and excess slurry on the surface of the micro gravure roll 1 can be removed by the scraper 4; in addition, the stock bin 2 can be a scraping hopper (a scraping hopper in the prior art), and the contact part of the scraping hopper and the micro gravure roll 1 forms a scraping device, so that the scraping hopper is used for removing the redundant slurry on the surface of the micro gravure roll 1.
As an optional implementation manner of the embodiment of the present invention, the groove hole structure 3 includes a large groove hole structure 32 and a small groove hole structure 31, and the large groove hole structure 32 and the small groove hole structure 31 are uniformly spaced along the axis direction of the micro gravure roller 1 and are uniformly spaced along the circumferential direction of the micro gravure roller 1. The large groove hole structures 32 and the small groove hole structures 31 are uniformly distributed on the micro gravure roller 1 at intervals, so that the slurry is uniformly coated on the diaphragm, and the performance of the diaphragm is improved.
As an optional implementation manner of the embodiment of the present invention, in order to implement multiple different uniform coating manners of the diaphragm, there may be a manner that, for example, the diameter of the large groove hole structure 32 is larger than that of the small groove hole structure 31 on the same cross section, and the depth of the large groove hole structure 32 is larger than or smaller than or equal to that of the small groove hole structure 31, see fig. 2, the large groove hole structure 32 and the small groove hole structure 31 are uniformly distributed at intervals; alternatively, referring to fig. 4, the diameter of the large groove hole structure 32 is equal to the diameter of the small groove hole structure 31 on the same cross section, and the depth of the large groove hole structure 32 is greater than the depth of the small groove hole structure 31; alternatively, the diameter of the large groove hole structure 32 is equal to the diameter of the small groove hole structure 31, and the depth of the large groove hole structure 32 is equal to the depth of the small groove hole structure 31, i.e. the small groove hole structure 31 and the large groove hole structure 32 have the same structure.
As an optional implementation manner of the embodiment of the present invention, the micro gravure roller 1 is provided with the axial connection wire slot 6, the axial connection wire slot 6 passes through the centers of all the groove hole structures 3 in the same row along the axial direction of the micro gravure roller 1, and/or the micro gravure roller 1 is provided with the circumferential connection wire slot 7, and the circumferential connection wire slot 7 passes through the centers of all the groove hole structures 3 in the same circle along the circumferential direction of the micro gravure roller 1; and/or the micro gravure roller 1 is provided with a spiral connecting wire groove 8, and the spiral connecting wire groove 8 is in a spiral shape and penetrates through the centers of all groove hole structures 3 in the same row. Referring to fig. 6, fig. 6 illustrates the axial connecting wire groove 6 and the circumferential connecting wire groove 7; fig. 7 illustrates a circumferential connecting wire groove 7; fig. 8 illustrates the axial connecting wire groove 6, the circumferential connecting wire groove 7, and the spiral connecting wire groove 8. The depth of the axial connecting wire groove 6, the circumferential connecting wire groove 7 and the spiral connecting wire groove 8 is smaller than that of the groove hole structure 3.
As an optional implementation manner of the embodiment of the present invention, the diameter range of the micro gravure roller 1 is 30mm to 500 mm; the depth range of the groove hole structure 3 on the surface of the micro gravure roller 1 is 10-220 mu m; the diameter range of the groove hole structure 3 of the micro gravure roller 1 is 30-500 mu m.
As the embodiment of the present invention can be optionally implemented, each row of groove hole structures 3 along the axis direction of the micro gravure roller 1 is distributed in a spiral shape. Referring to fig. 3, 5 and 7, the groove hole structures 3 are uniformly distributed along the micro gravure roll 1, and the micro gravure roll 1 adopting such a structure is coated in a diaphragm type, and the connecting line of the slurry along the width direction of the diaphragm is not perpendicular to the length direction of the diaphragm, but has an inclined angle with respect to the width direction of the diaphragm, for example, may be inclined by 1 °.
A diaphragm coating process for coating a battery diaphragm by a non-full-coverage diaphragm coating device comprises the following steps that a micro gravure roller 1 rotates, and slurry in a storage bin 2 flows into a groove hole structure 3 on the circumferential surface of the micro gravure roller 1; in the process of rotating the micro gravure roller 1, the scraper 4 scrapes off redundant slurry on the circumferential surface of the micro gravure roller 1; the diaphragm is tightly attached to the micro gravure roller 1, so that the slurry of the groove hole structure 3 is coated on the moving diaphragm to form uniform non-full-coverage coating. The coated membrane is baked in an oven to form a stable coated membrane.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The non-full-coverage diaphragm coating device is characterized by comprising a micro gravure roller (1) and a storage bin (2),
feed bin (2) set up one side of little gravure roll (1), be provided with feed bin export (21) on feed bin (2), thick liquids in feed bin (2) can pass through feed bin export (21) directly flow in little gravure roll (1) circumference is surperficial in recess hole structure (3).
2. The non-full-coverage membrane coating device according to claim 1, characterized by further comprising a scraping device for removing the slurry on the surface of the micro gravure roll (1).
3. The non-full-coverage membrane coating device according to claim 2, wherein the scraping device comprises a scraper (4) for removing the surface slurry of the micro gravure roll (1).
4. The non-full-coverage membrane coating device according to claim 2, characterized in that the silo (2) is a scraping hopper, and the portion of the scraping hopper in contact with the micro gravure roll (1) forms the scraping device.
5. The non-full-coverage membrane coating device according to claim 1, wherein the groove hole structures (3) comprise large groove hole structures (32) and small groove hole structures (31), and the large groove hole structures (32) and the small groove hole structures (31) are uniformly spaced along the axial direction of the micro gravure roll (1) and are uniformly spaced along the circumferential direction of the micro gravure roll (1).
6. The non-full-coverage membrane coating device according to claim 5, wherein the diameter of the large groove hole structure (32) is larger than that of the small groove hole structure (31) on the same cross section, and the depth of the large groove hole structure (32) is larger than or smaller than or equal to that of the small groove hole structure (31); or the diameter of the big groove hole structure (32) is equal to that of the small groove hole structure (31) on the same cross section, and the depth of the big groove hole structure (32) is greater than or equal to that of the small groove hole structure (31).
7. The non-full-coverage membrane coating device according to claim 5, wherein the micro gravure roll (1) is provided with an axial connecting wire slot (6), and the axial connecting wire slot (6) passes through the centers of all the groove hole structures (3) in the same row along the axial direction of the micro gravure roll (1);
and/or a circumferential connecting wire groove (7) is arranged on the micro gravure roller (1), and the circumferential connecting wire groove (7) penetrates through the centers of all groove hole structures (3) in the same circle along the circumferential direction of the micro gravure roller (1);
and/or a spiral connecting wire groove (8) is arranged on the micro gravure roller (1), and the spiral connecting wire groove (8) is in a spiral line shape and penetrates through the centers of all groove hole structures (3) in the same row.
8. The non-full-coverage membrane coating device according to claim 1, 5, 6 or 7, characterized in that the diameter of the micro gravure roll (1) ranges from 30mm to 500 mm; the depth range of the groove hole structure (3) on the surface of the micro gravure roller (1) is 10-220 mu m; the diameter range of the groove hole structure (3) of the micro gravure roller (1) is 30-500 mu m.
9. The non-full-coverage membrane coating device according to claim 1 or 5 or 6 or 7, wherein each row of groove-hole structures (3) along the axis direction of the micro gravure roll (1) is spirally distributed.
10. The non-full-coverage membrane coating device according to claim 1, wherein the micro gravure roll (1) is a roller with ceramic material sprayed on the surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920590272.XU CN209866498U (en) | 2019-04-26 | 2019-04-26 | Non-full-coverage diaphragm coating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920590272.XU CN209866498U (en) | 2019-04-26 | 2019-04-26 | Non-full-coverage diaphragm coating device |
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| Publication Number | Publication Date |
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| CN209866498U true CN209866498U (en) | 2019-12-31 |
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| CN201920590272.XU Active CN209866498U (en) | 2019-04-26 | 2019-04-26 | Non-full-coverage diaphragm coating device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109939884A (en) * | 2019-04-26 | 2019-06-28 | 常州瑞赛激光技术有限公司 | Non- all standing diaphragm apparatus for coating and diaphragm coating process |
| WO2021217715A1 (en) * | 2020-04-30 | 2021-11-04 | 南通大学 | Round pit texture surface tension-based leather roller coating device and roller coating method therefor |
-
2019
- 2019-04-26 CN CN201920590272.XU patent/CN209866498U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109939884A (en) * | 2019-04-26 | 2019-06-28 | 常州瑞赛激光技术有限公司 | Non- all standing diaphragm apparatus for coating and diaphragm coating process |
| WO2021217715A1 (en) * | 2020-04-30 | 2021-11-04 | 南通大学 | Round pit texture surface tension-based leather roller coating device and roller coating method therefor |
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