CN220611105U - Novel lithium battery pole piece coating device - Google Patents
Novel lithium battery pole piece coating device Download PDFInfo
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- CN220611105U CN220611105U CN202322215281.XU CN202322215281U CN220611105U CN 220611105 U CN220611105 U CN 220611105U CN 202322215281 U CN202322215281 U CN 202322215281U CN 220611105 U CN220611105 U CN 220611105U
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- pair
- foil
- rollers
- roller
- pole piece
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- 239000011248 coating agent Substances 0.000 title claims abstract description 76
- 238000000576 coating method Methods 0.000 title claims abstract description 76
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 22
- 239000011888 foil Substances 0.000 claims abstract description 85
- 238000010438 heat treatment Methods 0.000 claims abstract description 57
- 238000004804 winding Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 abstract description 24
- 238000001035 drying Methods 0.000 abstract description 23
- 239000002904 solvent Substances 0.000 abstract description 5
- 239000007772 electrode material Substances 0.000 description 11
- 239000011247 coating layer Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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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- Battery Electrode And Active Subsutance (AREA)
Abstract
The utility model provides a novel lithium battery pole piece coating device, which comprises: the foil material is unreeled through the unreeling structure and then enters the reeling structure, the foil material further comprises a supporting roller, a coating head and a first pair of rollers, the supporting roller, the coating head and the supporting roller are arranged between the unreeling structure and the reeling structure, the supporting roller and the first pair of rollers are parallel to each other, the foil material enters the space between the supporting roller and the coating head after passing through the first pair of rollers, and at least one roller shaft in the first pair of rollers is a heating roller. According to the utility model, the first pair of rollers is arranged before coating to preheat the foil, so that the temperature difference between the coating and the foil during drying is reduced, the solvent at the bottom of the coating can be synchronously evaporated, the crack problem is reduced, the residual stress in part of the foil can be eliminated, and the quality of the pole piece is improved.
Description
Technical Field
The utility model relates to the technical field of battery processing equipment, in particular to a novel lithium battery pole piece coating device.
Background
At present, the lithium ion battery has the characteristics of pursuing high capacity and high rate performance, and meanwhile, the market of the lithium ion battery has the explosive growth trend, and higher requirements are put forward for the productivity of the lithium ion battery.
In the present stage, in order to meet the requirements of performance and productivity, the coating speed and coating density of the electrode material of the lithium ion battery are both increased, which requires that the drying equipment of the electrode sheet also needs to provide higher temperature, larger air quantity and longer drying distance, and at this time, quality problems, such as electrode coating material cracks and curling of the electrode sheet, are very easy to be brought to the electrode sheet. In general, a pole piece of a battery is subjected to a conveying and coating step before being dried and then enters a drying oven to be subjected to a coating material drying treatment, for example, chinese patent CN106252605a discloses a heating method and a heating device for a front stage of double-sided coating, wherein the pole piece is guided by a roller and then enters a heating device to be dried after being coated by a coating head, and such a coating structure cannot well overcome the problems of cracks and curling of the coating material.
In view of the above, there is a need for a coating apparatus that can improve the coating quality of lithium battery electrode materials.
Disclosure of Invention
In view of the above, the utility model provides a novel lithium battery pole piece coating device, which aims to improve the quality of electrode materials of a lithium battery pole piece.
The technical scheme of the utility model is realized as follows: the utility model provides a novel lithium battery pole piece coating device, which comprises: the foil material is unreeled through the unreeling structure and then enters the reeling structure, the foil material further comprises a supporting roller, a coating head and a first pair of rollers, the supporting roller, the coating head and the supporting roller are arranged between the unreeling structure and the reeling structure, the supporting roller and the first pair of rollers are parallel to each other, the foil material enters the space between the supporting roller and the coating head after passing through the first pair of rollers, and at least one roller shaft in the first pair of rollers is a heating roller.
In some embodiments, both rollers of the first pair of rollers are heated rollers.
In some embodiments, the device further comprises a second pair of rollers, the second pair of rollers is arranged in parallel with the first pair of rollers, the second pair of rollers is arranged between the first pair of rollers and the coating head, the foil material sequentially passes through the first pair of rollers and the second pair of rollers and then enters between the supporting roller and the coating head, and at least one roller shaft in the second pair of rollers is a heating roller.
In some embodiments, both rollers of the second pair of rollers are heated rollers.
In some embodiments, the first tensioning roller is disposed in parallel with the second pair of rollers, the first tensioning roller is disposed between the first pair of rollers and the second pair of rollers, and the foil material passes over the first tensioning roller surface and the second pair of rollers in sequence after being fed out from the first pair of rollers.
In some embodiments, the coating head further comprises a hot air oven, wherein the hot air oven is arranged between the supporting roller and the winding structure, and an air outlet of the hot air oven is opposite to one side of the foil material far away from the coating head.
In some embodiments, the hot air oven has a plurality of air outlets, and the plurality of air outlets are arranged in an array along the conveying direction of the foil.
In some embodiments, the distance between the air outlet and the foil decreases gradually along the transport direction of the foil.
In some embodiments, the coating device further comprises an infrared heating pipe, wherein the infrared heating pipe is arranged between the coating head and the winding structure, the infrared heating pipe is opposite to one side surface of the foil close to the coating head, and the axis direction of the infrared heating pipe is parallel to the width direction of the foil.
In some embodiments, the number of infrared heating tubes is a plurality, and the plurality of infrared heating tubes are arranged in an array at intervals along the conveying direction of the foil.
Compared with the prior art, the novel lithium battery pole piece coating device has the following beneficial effects:
according to the lithium battery pole piece coating device, the first pair of rollers are arranged before coating, and the foil is heated, so that residual stress in the foil can be eliminated, the probability of occurrence of wrinkling cracks in subsequent processing of the foil is reduced, meanwhile, after the electrode material is coated on the heated foil, the solvent at the bottom layer of the coating layer can be heated more quickly, so that the volatilization speed is kept faster, the volatilization speed is kept basically consistent with that of the surface layer coating, and the probability of occurrence of cracks in the electrode material layer in the drying process is greatly reduced.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a pole piece coating device of the present utility model.
In the figure: 1-foil, 2-unreeling structure, 3-reeling structure, 4-backing roll, 5-coating head, 6-first pair of rolls, 7-second pair of rolls, 8-first tensioning roll, 9-hot air oven, 91-air outlet, 10-infrared heating pipe, 11-drying oven.
Detailed Description
The following description of the embodiments of the present utility model will clearly and fully describe the technical aspects of the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, are intended to fall within the scope of the present utility model.
As shown in fig. 1, a schematic structural diagram of an embodiment of the novel lithium battery pole piece coating device of the present utility model includes: the foil 1, unreel the structure 2, the winding structure 3, the backing roll 4, coating head 5 and first pair of roller 6, wherein foil 1 is unreeled through unreeling the structure 2, pass through between two roller shafts of first pair of roller 6 in proper order, between backing roll 4 and coating head 5, then get into winding structure 3, still be provided with drying oven 11 between backing roll 4 and winding structure 3, just set up between backing roll 4 and coating head 5, foil 1 is through backing roll 4 surface, coating head 5 can carry out electrode material's coating to foil 1 through backing roll 4 surface, the foil 1 after the coating gets into winding structure 3 after drying oven 11 and rolls, first pair of roller 6 includes two closely roll shafts, at least one of two roller shafts of first pair of roller 6 is the heating roller.
In the above embodiment, before the foil 1 is coated, the first pair of rollers 6 is used to roll and heat the foil 1, by heating and rolling the foil 1 in advance, on one hand, the temperature of the foil 1 before entering the drying oven 11 can be increased, so that the electrode material can be preheated by the foil 1 after being coated on the surface of the foil 1, the electrode material surface is prevented from being heated after entering the drying oven 11, the temperature of the electrode material at the bottom layer is low, the internal and external temperature differences are caused, the electrode material is heated unevenly, internal cracks are generated, and secondly, the heating and rolling of the foil 1 are helpful to eliminate the internal stress of the foil 1, the problem that the foil 1 is wrinkled after being heated in the drying oven 11 is reduced, and the heating time and distance of the drying oven 11 can be reduced by the way of heating in advance.
In some embodiments, both rollers of the first pair of rollers 6 are heated rollers.
The above embodiment is taken as a preferable scheme, the two roll shafts heat the two side surfaces of the foil 1, which is favorable for improving the heating speed of the foil 1 and heating uniformity, and is more favorable for efficient pole piece production and uniform release of internal stress of the foil 1.
In some embodiments, the device further comprises a second pair of rollers 7, the second pair of rollers 7 is parallel to the first pair of rollers 6, the second pair of rollers 7 is arranged between the first pair of rollers 6 and the coating head 6, the foil 1 sequentially passes through the first pair of rollers 6 and the second pair of rollers 7 and then enters between the supporting roller 4 and the coating head 5, at least one roller shaft in the second pair of rollers 7 is a heating roller
In the above embodiment, a set of paired rollers is set at the rear of the first paired rollers 6 again, so that the heating time of the foil 1 before coating can be prolonged, the degree of releasing internal stress of the foil 1 can be further improved, meanwhile, the second paired rollers 7 can further heat the foil 1, on one hand, the heat energy can be supplemented, the heating temperature and the processing speed of the foil 1 can be improved, and meanwhile, the situation that the heat loss and the temperature reduction of the foil 1 occur in the conveying process after the first paired rollers 6 are heated can be avoided, and the effect of temperature compensation is achieved.
In some embodiments, both rolls of the second pair of rolls 7 are heated rolls.
The above embodiment is taken as a preferable scheme, the two roll shafts heat the two side surfaces of the foil 1, which is favorable for improving the heating speed of the foil 1 and the heating uniformity, and further improves the production efficiency of the pole piece and the uniform release of the internal stress of the foil 1.
In the above embodiment, the first tensioning roller 8 is further included, the second pair of rollers 7 is disposed in parallel with the first tensioning roller 8, the first tensioning roller 8 is disposed between the first pair of rollers 6 and the second pair of rollers 7, and the foil 1 passes through the surface of the first tensioning roller 8 and the second pair of rollers 7 in order after being sent out from the first pair of rollers 6.
In the above embodiment, the first tensioning roller 8 is used for supporting the foil 1 sent out by the first pair of rollers 6 and performing auxiliary transformation of the conveying direction, and meanwhile, the first tensioning roller 8 can support the foil 1 heated by the first pair of rollers 6 to further assist in releasing the stress in the foil 1.
In some embodiments, the hot air oven 9 is further included, the hot air oven 9 is disposed between the support roller 4 and the winding structure 3, and an air outlet 91 of the hot air oven 9 is opposite to a side of the foil 1 away from the coating head 5.
In the above embodiment, the hot air oven 9 is used for producing hot air and heating the back surface of the coated foil 1, and since the surface of the coated material is heated faster and the solvent dries faster in the process of heating in the drying oven 11, the problem that the solvent still exists in the surface drying is easy to occur, and thus the coating material of the surface layer is cracked, in order to overcome the problem as much as possible, the back surface of the foil 1 is preheated before entering the drying oven 11 after coating, so that the inner side of the coated material is preheated, the drying of the inner side solvent is promoted, the cohesive force is further improved, and the surface layer material is heated faster after entering the drying oven 11, thereby approaching the same drying speed as the inner side, and the occurrence probability of the cracking of the coating material is greatly reduced.
In some embodiments, the hot air oven 9 has a plurality of air outlets 91, and the plurality of air outlets 91 are arrayed along the conveying direction of the foil 1.
In the above embodiment, the plurality of air outlets 91 heat the back surface of the foil 1 by blowing hot air, so that the heating efficiency can be improved.
In some embodiments, the distance between the air outlet 91 and the foil 1 gradually decreases along the transport direction of the foil 1.
In the above embodiment, the distances between the plurality of air outlets 91 and the back surface of the foil material 1 are different, the distance gradually decreases along the conveying direction, the smaller the distance between the air outlets 91 and the foil material 1 is, the better the heating effect is, the faster the heating speed is, as a better heating mode, before the foil material 1 enters the drying oven 11, the closer the temperature of the surface of the foil material is to the temperature in the drying oven 11, the better the heating speed can directly influence the adhesion effect of the electrode material coated on the surface of the pole piece and the surface morphology of the foil material 1, and the smoother the heating process is, so that the heating effect can be gradually improved by adopting the distance between the air outlets 91 and the foil material 1 which is gradually reduced.
In some embodiments, the coating device further comprises an infrared heating tube 10, wherein the infrared heating tube 10 is arranged between the coating head 5 and the winding structure 3, the infrared heating tube 10 faces one side surface of the foil 1 close to the coating head 5, and the axis direction of the infrared heating tube 10 is parallel to the width direction of the foil 1.
In the above embodiment, the infrared heating pipe 10 is used for auxiliary heating of the coated coating layer after coating, since the hot air oven 9 heats the back surface of the foil 1, the temperature of the foil 1 gradually increases, and at this time, too large deviation of the temperature of the coating layer relative to the temperature of the foil 1 before entering the drying oven 11 can also cause separation cracking between the coating layer and the foil 1, so that auxiliary heating of the coating layer before entering the drying oven 11 is required, and the infrared heating pipe 10 can have a good non-contact heating effect to alleviate the possible problems.
In some embodiments, the number of infrared heating pipes 10 is plural, and the plurality of infrared heating pipes 10 are arranged in an array at intervals along the conveying direction of the foil material 1.
In the above embodiment, the plurality of infrared heating pipes 10 are arranged at intervals, so that continuous heating can be performed, and the production speed of the pole piece can be improved.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (10)
1. A novel lithium battery pole piece coating device, comprising: foil (1), unreel structure (2) and winding structure (3), get into winding structure (3) after unreeling structure (2) are unreeled in foil (1), a serial communication port, still including setting up backing roll (4), coating head (5) and first pair of roller (6) between unreeling structure (2) and winding structure (3), coating head (5) are just to setting up with backing roll (4), backing roll (4) and first pair of roller (6) are parallel to each other, get into between backing roll (4) and coating head (5) after foil (1) pass through first pair of roller (6), at least one roller in first pair of roller (6) is the heating roller.
2. The novel lithium battery pole piece coating device according to claim 1, wherein both roll shafts in the first pair of rolls (6) are heating rolls.
3. The novel lithium battery pole piece coating device according to claim 1, further comprising a second pair of rollers (7), wherein the second pair of rollers (7) are arranged in parallel with the first pair of rollers (6), the second pair of rollers (7) are arranged between the first pair of rollers (6) and the coating head (5), the foil (1) sequentially passes through the first pair of rollers (6) and the second pair of rollers (7) and then enters between the supporting roller (4) and the coating head (5), and at least one roller shaft in the second pair of rollers (7) is a heating roller.
4. A novel lithium battery pole piece coating device as claimed in claim 3, characterized in that both roll shafts of the second pair of rolls (7) are heating rolls.
5. A novel lithium battery pole piece coating device as claimed in claim 3, characterized in that the novel lithium battery pole piece coating device further comprises a first tensioning roller (8), a second pair of rollers (7) are arranged in parallel with the first tensioning roller (8), the first tensioning roller (8) is arranged between the first pair of rollers (6) and the second pair of rollers (7), and the foil (1) sequentially passes through the surface of the first tensioning roller (8) and the second pair of rollers (7) after being sent out from the first pair of rollers (6).
6. The novel lithium battery pole piece coating device according to claim 1, further comprising a hot air oven (9), wherein the hot air oven (9) is arranged between the supporting roller (4) and the winding structure (3), and an air outlet (91) of the hot air oven (9) is opposite to one side, far away from the coating head (5), of the foil (1).
7. The novel lithium battery pole piece coating device according to claim 6, wherein the number of the air outlets (91) of the hot air oven (9) is plural, and the air outlets (91) are arrayed along the conveying direction of the foil (1).
8. The novel lithium battery pole piece coating device according to claim 7, wherein the distance between the air outlet (91) and the foil (1) is gradually reduced along the conveying direction of the foil (1).
9. The novel lithium battery pole piece coating device according to claim 6, further comprising an infrared heating pipe (10), wherein the infrared heating pipe (10) is arranged between the coating head (5) and the winding structure (3), the infrared heating pipe (10) is opposite to one side surface of the foil (1) close to the coating head (5), and the axis direction of the infrared heating pipe (10) is parallel to the width direction of the foil (1).
10. The novel lithium battery pole piece coating device according to claim 9, wherein the number of the infrared heating pipes (10) is a plurality of the infrared heating pipes (10) which are arranged in an array at intervals along the conveying direction of the foil (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322215281.XU CN220611105U (en) | 2023-08-16 | 2023-08-16 | Novel lithium battery pole piece coating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322215281.XU CN220611105U (en) | 2023-08-16 | 2023-08-16 | Novel lithium battery pole piece coating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220611105U true CN220611105U (en) | 2024-03-19 |
Family
ID=90232188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322215281.XU Active CN220611105U (en) | 2023-08-16 | 2023-08-16 | Novel lithium battery pole piece coating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220611105U (en) |
-
2023
- 2023-08-16 CN CN202322215281.XU patent/CN220611105U/en active Active
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