CN116885110B - Multistage roll squeezer and multistage roll pressing process - Google Patents
Multistage roll squeezer and multistage roll pressing process Download PDFInfo
- Publication number
- CN116885110B CN116885110B CN202311034764.8A CN202311034764A CN116885110B CN 116885110 B CN116885110 B CN 116885110B CN 202311034764 A CN202311034764 A CN 202311034764A CN 116885110 B CN116885110 B CN 116885110B
- Authority
- CN
- China
- Prior art keywords
- roller
- pole piece
- rolling
- tension
- multistage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000003825 pressing Methods 0.000 title claims description 5
- 238000000034 method Methods 0.000 title description 15
- 230000008569 process Effects 0.000 title description 13
- 230000007246 mechanism Effects 0.000 claims abstract description 129
- 238000005096 rolling process Methods 0.000 claims abstract description 123
- 239000004809 Teflon Substances 0.000 claims description 18
- 229920006362 Teflon® Polymers 0.000 claims description 18
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000000576 coating method Methods 0.000 description 21
- 239000011248 coating agent Substances 0.000 description 10
- 230000001105 regulatory effect Effects 0.000 description 9
- 239000000463 material Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000013543 active substance Substances 0.000 description 4
- 239000002390 adhesive tape Substances 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000037303 wrinkles Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/043—Processes of manufacture in general involving compressing or compaction
- H01M4/0435—Rolling or calendering
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The application relates to a multistage roller press and a multistage rolling process, and relates to the technical field of battery production, wherein the multistage roller press comprises a frame, a plurality of rolling mechanisms are arranged in the frame, and the rolling mechanisms are sequentially arranged at intervals along the conveying direction of pole pieces; the rolling mechanism comprises a first roller and a second roller, the first roller and the second roller are axially arranged in parallel, the side wall of the first roller and the side wall of the second roller are arranged at intervals, the first roller and the second roller are coaxially connected with a driving motor, and a driving oil cylinder capable of driving the first roller and the second roller to move close to or far away from each other is arranged between the first roller and the second roller. According to the application, through the arrangement of the plurality of rolling mechanisms, the multistage rolling of the pole piece is realized, the thickness of the pole piece is thinned step by step, so that the deformation of the pole piece in each rolling is smaller, the rebound of the pole piece is smaller, and the yield of the pole piece can be improved.
Description
Technical Field
The application relates to the technical field of battery production, in particular to a multi-stage roll squeezer and a multi-stage roll pressing process.
Background
The roll squeezer is mainly applied to the roll-in procedure of pole pieces in the lithium electrode industry in the battery production. The main principle of the roll processing of the pole piece by the roll squeezer is as follows: the pole piece passes between rollers with opposite rotating directions, and the action of the rollers on the pole piece enables the coating on the surface of the pole piece to reach a certain thickness.
After the pole piece is coated and dried, the peeling strength of the active substance and the current collector foil is very low, and the active substance and the foil are required to be rolled to strengthen the bonding strength of the active substance and the foil so as to prevent the peeling in the processes of electrolyte soaking and battery use. Meanwhile, the volume of the battery core can be compressed by rolling the pole piece, the energy density of the battery core is improved, the porosity among active substances, conductive agents and binders in the pole piece is reduced, the resistance of the battery is reduced, and the performance of the battery is improved.
At present, a common roller press comprises a main machine frame, an upper roller, a lower roller, a main oil cylinder, a front-back stretching mechanism and the like, a pole piece penetrates through a gap between the upper roller and the lower roller, and the pole piece is rolled through the upper roller and the lower roller.
Aiming at the related technology, in the rolling process of the existing pole piece, the pole piece is rolled by a roller press at normal pressure, so that the pole piece is formed by one-time rolling. Because the thickness difference is relatively large before and after the pole piece is rolled, the pole piece can be rolled with great force, meanwhile, the thickness change before and after the pole piece is rolled is large, the deformation generated by the pole piece is further caused, the extensibility of the pole piece is relatively large, the rebound of the pole piece is also caused to be relatively large, the coating on the surface of the pole piece is easy to cause the broken piece, and the final battery performance is further influenced.
Disclosure of Invention
The application provides a multi-stage roll squeezer and a multi-stage roll pressing process, which aim to increase the yield of rolled battery pole pieces.
In a first aspect, the present application provides a multi-stage roller press, which adopts the following technical scheme:
The multistage roller press comprises a frame, wherein a plurality of rolling mechanisms are arranged in the frame, and the rolling mechanisms are sequentially arranged at intervals along the conveying direction of the pole pieces; the rolling mechanism comprises a first roller and a second roller, the first roller and the second roller are axially arranged in parallel, the side wall of the first roller and the side wall of the second roller are arranged at intervals, the first roller and the second roller are coaxially connected with a driving motor, and a driving oil cylinder capable of driving the first roller and the second roller to move close to or far away from each other is arranged between the first roller and the second roller.
By adopting the technical scheme, the first roller and the second roller in the rolling mechanism are arranged at intervals, so that the pole piece can be fed between the first roller and the second roller, and the first roller and the second roller are driven by the driving motor to rotate, so that the rolling and conveying of the pole piece are realized; and the distance between the first roller and the second roller can be changed by setting the driving oil cylinder, so that the rolling effect of the rolling mechanism on the pole piece is changed, and the thickness of the pole piece output in the rolling mechanism is changed.
The pole piece can pass through the plurality of rolling mechanisms in sequence, each rolling mechanism can roll in sequence the pole piece, and therefore multistage rolling can be carried out on the pole piece through the arrangement of the plurality of rolling mechanisms. In multistage roll-in, adjust the interval between first roll and the second roll in the roll-in mechanism that corresponds through the actuating cylinder that corresponds to along the direction of delivery of pole piece, make the clearance between first roll and the second roll in a plurality of roll-in mechanisms diminish in proper order, thereby make the pole piece in the in-process of multistage roll-in, the thickness of pole piece can attenuate in proper order, make the deformation of pole piece roll-in at every turn less, and then the resilience of pole piece is also less, thereby can reduce the cracked possibility of surface coating of pole piece, and then can improve the yields of final battery.
Optionally, tension swing roller mechanisms are arranged between two adjacent rolling mechanisms.
By adopting the technical scheme, the tension swing roller mechanism has a linking effect on one hand, receives the pole piece sent out from the last rolling mechanism and conveys the pole piece to the next rolling mechanism; on the other hand, the device has a tension adjusting function, adjusts the surface tension of the pole piece, and is convenient for conveying the pole piece.
Optionally, a first tension roller mechanism and a second tension roller mechanism are respectively arranged on two opposite sides of the frame, and a plurality of rolling mechanisms are arranged between the first tension roller mechanism and the second tension roller mechanism.
By adopting the technical scheme, the first tension roller mechanism and the second tension roller mechanism are arranged, so that the tension of the pole piece can be adjusted before the pole piece is fed into the rolling mechanism, and the pole piece is conveniently fed into the rolling mechanism; and the second tension roller mechanism is arranged, so that the pole piece conveyed out by the rolling mechanism can be subjected to tension adjustment, and the blanking of the pole piece is facilitated.
Optionally, the tension pendulum roller mechanism includes tension regulating roller, tension regulating roller outside cover is equipped with a plurality of indisputable fluorine dragon gum ring, a plurality of indisputable fluorine dragon gum ring is followed tension regulating roller's axial mutual interval sets up.
By adopting the technical scheme, as the coating on the surface of the pole piece is thinned due to the rolling process, the coating can extend and spread to the periphery on the pole piece, and the pole piece at the gap between two adjacent coatings can deform and fold in the process of spreading the two coatings.
When tension adjustment roller carries out tension adjustment to the pole piece, the teflon rubber ring can be embedded between two adjacent coatings on the pole piece to the teflon rubber ring can directly contact with the pole piece, and then can carry out the bearing to the pole piece, consequently the cooperation tension adjustment roller can carry out tensile flattening with the pole piece, and the region of quilt bearing can produce certain extension, and then reduces with the pole piece deformation difference that the roll-in produced, even with deformation unanimity, slows down or eliminates fold and the broken piece problem that produces because of the roll-in deformation difference.
Optionally, the tension swing roller mechanism further comprises a first auxiliary roller and a second auxiliary roller, and the first auxiliary roller and the second auxiliary roller are arranged at two sides of the tension adjusting roller at intervals along the conveying direction of the pole piece.
By adopting the technical scheme, the first auxiliary roller and the second auxiliary roller are arranged, and when the pole piece sequentially passes through the first auxiliary roller, the tension adjusting roller and the second auxiliary roller, the tension adjusting roller can be assisted to realize the adjustment of the surface tension of the pole piece; on the other hand, in the process of carrying out pole piece tension adjustment by the tension adjusting roller, the pole pieces passing by the first auxiliary roller and the second auxiliary roller can be stretched along the length direction of the pole pieces, so that the pole piece deformation between two adjacent coatings along the length direction of the pole pieces can be weakened or eliminated.
In a second aspect, the present application provides a multi-stage rolling process, which adopts the following technical scheme:
The multistage rolling process for rolling the pole piece by using the multistage rolling machine comprises the following steps of:
s1: and (3) feeding: sending the pole piece into equipment;
S2: processing;
S21: and (3) adjusting: adjusting a gap between a first roller and a second roller in the rolling mechanism;
s22: and (3) rolling: sequentially passing the pole pieces through a plurality of rolling mechanisms, and rolling the pole pieces for a plurality of times;
S3: and (3) blanking: and outputting the pole piece from the device.
By adopting the technical scheme, the pole piece strip material is subjected to four rolling processes, so that the roller pressure of each stage is far smaller than the force required by a one-time rolling forming mode due to the arrangement of multiple stages of rolling, the roller mechanism can be designed to be smaller, the processing cost is much lower than that of a large-sized roller, and the installation and the transportation are relatively easy. Most importantly, the stability and consistency of the product obtained by rolling in the mode are relatively better than those of the product obtained by one-step forming, and the rebound rate, the wrinkling sheet, the breakage and other flaw problems can be greatly improved.
Optionally, in step S21, gaps between the first roller and the second roller in the plurality of rolling mechanisms sequentially decrease along the conveying direction of the pole piece.
Through adopting above-mentioned technical scheme, along the direction of delivery of pole piece, the clearance between the first roll and the second roll of a plurality of roll-in mechanisms diminishes gradually to make the pole piece can be after a plurality of roll-in mechanisms, the attenuation step by step.
Optionally, in step S22, the pole piece is subjected to tension adjustment between two adjacent roll processes.
By adopting the technical scheme, tension adjustment can ensure that pole pieces among a plurality of rolling mechanisms can be stably conveyed.
Optionally, in step S22, the pole piece is stretched in the width direction or/and the length direction of the pole piece between two adjacent rolling processes.
By adopting the technical scheme, after the pole piece is rolled, the coating can be outwards expanded in the rolling process, so that the pole piece between two adjacent coatings can be deformed such as wrinkles. At this time, wrinkles generated on the pole piece can be eliminated or reduced by stretching.
In summary, the present application includes at least one of the following beneficial technical effects:
1. Through the setting of a plurality of roll-in mechanism, realize the multistage roll-in of pole piece, become thin step by step with the thickness of pole piece for the deformation of pole piece at every turn roll-in is less, and then the resilience of pole piece is also less, can improve the yields of pole piece.
2. The driving oil cylinders are arranged in the rolling mechanism, so that the rolling amount of the rolling mechanism can be adjusted, and the rolling thickness of the pole piece can be controlled.
3. The tension swing roller mechanism can carry out tension adjustment on the pole piece and stretch and flatten the pole piece, so that the problems of folds and broken pieces caused by rolling deformation difference are slowed down or eliminated, and the yield of the pole piece can be improved.
Drawings
Fig. 1 is a schematic view showing the overall structure of a roll squeezer according to example 1 of the present application.
Fig. 2 is a schematic cross-sectional structure of a roll squeezer of example 1 in the present application.
Fig. 3 is a schematic view showing the overall structure of the dancer roller of example 1 of the present application.
Fig. 4 is a schematic view showing the overall structure of the dancer roll of example 1 of the present application when in operation.
Fig. 5 is a schematic view showing the overall structure of the tension swing roller mechanism of embodiment 2 of the present application.
Fig. 6 is a schematic cross-sectional view of the dancer roll of example 1 of the present application in operation.
In the figure, 1, a rack; 2. a rolling mechanism; 21. a first roller; 22. a second roller; 23. a driving oil cylinder; 3. a first tension roller mechanism; 4. a second tension roller mechanism; 5. a tension swing roller mechanism; 51. a first auxiliary roller; 52. a second auxiliary roller; 53. a tension adjusting roller; 54. a teflon rubber ring; 55. a support bar; 6. a pole piece; 7. and (3) coating.
Detailed Description
The present application will be described in further detail with reference to fig. 1 to 6.
The utility model provides a multistage roll squeezer, references fig. 1 and 2, includes frame 1, is provided with a plurality of roll-in mechanism 2 in the frame 1, and a plurality of roll-in mechanism 2 are along the interval setting in proper order of horizontal direction for along the direction of delivery of pole piece 6, pole piece 6 can pass through the roll-in processing of a plurality of roll-in mechanism 2 in proper order. The application is preferably 4 roll mechanisms 2.
Referring to fig. 2, the rolling mechanism 2 includes a first roller 21 and a second roller 22, the first roller 21 and the second roller 22 are axially parallel to each other, the first roller 21 and the second roller 22 are both axially disposed in a horizontal direction, the first roller 21 and the second roller 22 are vertically disposed at intervals from each other, and a gap for receiving the pole piece 6 to pass through is formed between the outer side surface of the first roller 21 and the outer side surface of the second roller 22.
Referring to fig. 2, the first roller 21 is disposed on the upper side of the second roller 22, and the first roller 21 and the second roller 22 are both coaxially connected with a driving motor, so that when the driving motor drives, the first roller 21 and the second roller 22 can rotate, on one hand, rolling of the pole piece 6 is achieved, and on the other hand, active conveying of the pole piece 6 is achieved.
Referring to fig. 2, a driving cylinder 23 is disposed at the lower side of the second roller 22, the driving cylinder 23 is disposed along the vertical direction, and the driving cylinder 23 is connected with the second roller 22, so that the position of the second roller 22 can be adjusted in the vertical direction through the arrangement of the driving cylinder 23, and then the gap between the first roller 21 and the second roller 22 can be adjusted through the driving of the driving cylinder 23, and since the first roller 21 and the second roller 22 roll the pole piece 6, the thickness of the pole piece 6 after rolling can be changed through adjusting the gap between the first roller 21 and the second roller 22.
Referring to fig. 2, a first tension roller mechanism 3 and a second tension roller mechanism 4 are respectively disposed on two sides of the frame 1 along the horizontal direction, the first tension roller mechanism 3 and the second tension roller mechanism 4 are disposed at intervals along the horizontal direction, and a plurality of rolling mechanisms 2 are disposed between the first tension roller mechanism 3 and the second tension roller mechanism 4.
The first tension roller mechanism 3 is internally provided with an unreeling roller and a first regulating roller, the unreeling roller is coaxially connected with a driving motor to realize unreeling of the pole piece 6, and the first regulating roller is used for guiding the pole piece 6 into the corresponding rolling mechanism 2.
The second tension roller mechanism 4 is internally provided with a wind-up roller and a second regulating roller, the wind-up roller is coaxially connected with a driving motor to realize the winding of the pole piece 6, and the second regulating roller is used for guiding the pole piece 6 conveyed out of the rolling mechanism 2, so that the winding is convenient.
Therefore, the surface tension of the pole piece 6 entering the plurality of rolling mechanisms 2 can be simultaneously regulated by the arrangement of the first tension roller mechanism 3, the surface tension of the pole piece 6 sent out from the plurality of rolling mechanisms 2 can be simultaneously regulated by the arrangement of the second tension roller mechanism 4, and the surface tension of the pole piece 6 before and after rolling and the conveying stability can be ensured by the cooperation of the first tension roller mechanism 3 and the second tension roller mechanism 4.
Referring to fig. 2, a plurality of tension swing roller mechanisms 5 are further disposed in the frame 1, the plurality of tension swing roller mechanisms 5 are sequentially disposed at intervals along the horizontal direction, and each tension swing roller mechanism 5 is disposed between two adjacent corresponding rolling mechanisms 2 along the conveying direction of the pole piece 6. Therefore, the pole piece 6 can be sent into the adjacent other rolling mechanism 2 through the corresponding tension swing roller mechanism 5 after being sent out from the one rolling mechanism 2, and the tension swing roller mechanism 5 can adjust the tension of the pole piece 6 between the rolling mechanism 2 and the rolling mechanism 2, adjust the position of the pole piece 6, and can keep the tension of the pole piece 6 and the conveying stability.
Referring to fig. 2, the tension swing roller mechanism 5 includes a first auxiliary roller 51, a second auxiliary roller 52, and a tension adjusting roller 53, the first auxiliary roller 51, the second auxiliary roller 52, and the tension adjusting roller 53 are all disposed in parallel, and the axial directions of the first auxiliary roller 51, the second auxiliary roller 52, and the tension adjusting roller 53 are all disposed in the horizontal direction. The first auxiliary roller 51 and the second auxiliary roller 52 are disposed at a distance from each other in the horizontal direction, the tension adjusting roller 53 is disposed between the first auxiliary roller 51 and the second auxiliary roller 52, and the tension adjusting roller 53 is disposed at the lower sides of the first auxiliary roller 51 and the second auxiliary roller 52 in the vertical direction. Thus, the first auxiliary roller 51 is used for receiving the pole piece 6 output from the rolling mechanism 2, the tension adjusting roller 53 is used for adjusting the tension of the pole piece 6, and the second auxiliary roller 52 is used for redirecting the pole piece 6 into the next adjacent rolling mechanism 2.
Referring to fig. 2 and 3, a plurality of teflon rubber rings 54 are sleeved on the outer side of the tension adjusting roller 53, and the teflon rubber rings 54 are made by winding adhesive tapes made of teflon materials on the tension adjusting roller 53, wherein the teflon rubber rings 54 are sequentially arranged at intervals along the axial direction of the tension adjusting roller 53.
Referring to fig. 3 and 4, the arrangement of the teflon glue rings 54 ensures that when the tension adjusting roller 53 conveys the pole piece 6, one teflon glue ring 54 exists on both sides of each coating 7 on the pole piece 6 along the axial direction of the tension adjusting roller 53. The teflon rubber ring 54 supports the suspended areas of the pole pieces 6 between the coatings 7, simultaneously pushes the coatings 7 on two sides towards the corresponding end parts of the tension adjusting roller 53 along the axial direction of the tension adjusting roller 53, and reduces wrinkles of the pole pieces 6 between the coatings 7 caused by rolling deformation of the coatings 7. The teflon ring 54 of the present application is preferably an adhesive tape made of teflon material.
The implementation principle of the embodiment of the application is as follows: when the device is in operation, the pole piece 6 enters the first rolling mechanism 2 through the first tension roller mechanism 3 at the inlet end of the device, the first roller 21 and the second roller 22 are driven by a driving motor to rotate and operate respectively, the second roller 22 is driven by a driving oil cylinder 23 and moves up and down, rolling operation is realized, and the rolling expansion rate can be set to be A1 at the moment.
After passing through the first rolling mechanism 2, the pole piece 6 is sent to the first tension swing roller mechanism 5, and tension adjustment and stretching and flattening of the pole piece 6 (at this time, the stretching flattening rate may be set to be B1).
Then, the pole piece 6 enters the second rolling mechanism 2, and the extensibility of the pole piece 6 after rolling is A2.
And by analogy, after the pole piece 6 is rolled by the four rolling mechanisms 2, the pole piece 6 with the extensibility of A4 is needed.
The rolling thicknesses A1, A2, A3 and A4 of each stage can be independently adjusted by corresponding to the extending stroke of the driving oil cylinder 23 in the rolling mechanism 2; the flattening rates B1, B2 and B3 can be independently adjusted through the corresponding tension swing roller mechanisms 5.
The pole piece 6 will produce deformation under the pressure effect of roll-in mechanism 2, and deformation direction is the diffusion of surrounding vacant region to make pole piece 6 thickness attenuate, but in the copper foil region that does not have lithium material, owing to the piling up of above-mentioned deformation, make copper foil that does not receive the pressure effect and pressure region have the deformation to be poor, cause defects such as pole piece 6 fold.
The pole piece 6 enters the corresponding tension swing roller mechanism 5 after being rolled by the corresponding rolling mechanism 2, the tension swing roller mechanism 5 can adjust certain tension to stretch and flatten the pole piece 6, and the flattening principle is that the tension swing roller mechanism 5 is provided with a Teflon adhesive tape on the surface of a tension adjusting roller 53 according to the need, so that a suspended area of the pole piece 6 is supported, and the supported area can be stretched to a certain extent under the tension stretching action; the deformation difference of the pole piece 6 generated by rolling is reduced, even the deformation is consistent, and the problems of folds and broken pieces generated by the rolling deformation difference are relieved or eliminated.
The multistage rolling process utilizes the multistage rolling equipment to roll and process the pole piece 6, and comprises the following steps:
s1: and (3) feeding: the strip of pole piece 6 coated with coating 7 is fed into the apparatus by the first tension roller mechanism 3.
S2: processing:
S21: and (3) adjusting: the gap between the first roller 21 and the second roller 22 is adjusted by a plurality of driving cylinders 23 in the rolling mechanism 2, and the gap between the first roller 21 and the second roller 22 in the rolling mechanism 2 is sequentially reduced along the conveying direction of the pole piece 6.
S22: primary rolling: the strip material of the pole piece 6 is sent into the first rolling mechanism 2, so that the rolling of the pole piece 6 is realized.
S23: primary tension adjustment: the strip of the pole piece 6 is sent into the first tension swing roller mechanism 5, tension adjustment is carried out on the pole piece 6, meanwhile, the pole piece 6 is stretched and flattened, and deformation of the pole piece 6 caused by rolling is reduced.
S24: and (3) secondary rolling: the strip material of the pole piece 6 is sent into the second rolling mechanism 2, so that the rolling of the pole piece 6 is realized.
S25: and (3) secondary tension adjustment: and (3) conveying the strip material of the pole piece 6 into a second tension swing roller mechanism 5, adjusting the tension of the pole piece 6, stretching and flattening the pole piece 6, and reducing the deformation of the pole piece 6 caused by rolling.
S26: three-stage rolling: and feeding the strip of the pole piece 6 into a third rolling mechanism 2 to roll the pole piece 6.
S27: three-stage tension adjustment: and (3) conveying the strip of the pole piece 6 into a third tension swing roller mechanism 5, adjusting the tension of the pole piece 6, stretching and flattening the pole piece 6, and reducing the deformation of the pole piece 6 caused by rolling.
S28: four-stage rolling: and feeding the strip of the pole piece 6 into a fourth rolling mechanism 2 to roll the pole piece 6.
Specifically, in the process of adjusting the tension of the strip of the pole piece 6, the teflon rubber ring 54 on the tension adjusting roller 53 is supported between two adjacent pole pieces 6 on the strip of the pole piece 6, the base band of the strip of the pole piece 6 is supported, and the two adjacent coatings 7 are pushed outwards in the width direction of the pole piece 6, so that the stretching and flattening of the pole piece 6 are realized, and the deformation of the base band of the strip of the pole piece 6 caused by rolling is reduced.
S3: and (3) blanking: and discharging the rolled pole piece 6 strip through a second tension roller.
Specifically, during the actual use production process, the number of the rolling mechanism 2 and the tension swing roller mechanism 5 can be selected according to actual needs, so that the production stability of the pole piece 6 is ensured. The number of the preferable rolling mechanisms 2 is 4, and the number of the tension swing roller mechanisms 5 is 3, so that the rolling mechanism can be subjected to 4 rolling processes and 3 tension adjustment processes.
The implementation principle of the embodiment of the application is as follows: the thickness of the coating 7 on the pole piece 6 strip can be gradually reduced by four rolling processes on the pole piece 6 strip, and the ductility of the pole piece 6 strip is adjusted by a tension adjusting process arranged between the two rolling processes. Therefore, the roller pressure of each stage is far smaller than the force required by a one-time rolling forming mode, the rolling mechanism 2 can be designed to be smaller, the processing cost is much lower than that of a large-sized roller, and the installation and the transportation are relatively easy. Most importantly, the stability and consistency of the product obtained by rolling in the mode are relatively better than those of the product obtained by one-step forming, and the rebound rate, the wrinkling sheet, the breakage and other flaw problems can be greatly improved.
Example 2:
This embodiment differs from embodiment 1 in that: referring to fig. 5 and 6, a plurality of support bars 55 are provided on the tension adjusting roller 53, the support bars 55 are divided into a plurality of groups, the length direction of the support bars 55 is set along the axial direction of the tension adjusting roller 53, each group of support bars 55 is set between two adjacent teflon rubber rings 54 along the axial direction of the tension adjusting roller 53, and each group of support bars 55 surrounds the outer side of the tension adjusting roller 53 at uniform intervals along the axial direction of the tension adjusting roller 53. The support strips 55 are embedded between two adjacent coatings 7 on the pole piece 6 in the conveying direction of the pole piece 6.
The implementation principle of the embodiment of the application is as follows: during the conveying process of the pole piece 6, the corresponding support strips 55 are embedded between the two adjacent coating layers 7 along the conveying direction of the pole piece 6, and under the tension adjustment effect of the first auxiliary roller 51 and the second auxiliary roller 52, the pole piece 6 on two sides of the support strips 55 can be subjected to the tension adjustment of the auxiliary roller and the second auxiliary roller 52, so that the pole piece 6 is stretched, and the deformation or the wrinkling of the pole piece 6 between the two coating layers 7 caused by rolling is reduced. Therefore, the fit arrangement of the teflon glue ring 54 and the support bar 55 enables the pole piece 6 to be deformed or wrinkled between the coating layers 7 along the width direction of the pole piece 6 and along the conveying direction of the pole piece 6, respectively.
The embodiments of the present application are all preferred embodiments of the present application, and are not intended to limit the scope of the present application, wherein like reference numerals are used to refer to like elements throughout. Therefore: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (7)
1. The multistage roller press comprises a frame (1) and is characterized in that a plurality of roller press mechanisms (2) are arranged in the frame (1), and the roller press mechanisms (2) are sequentially arranged at intervals along the conveying direction of a pole piece (6);
The rolling mechanism (2) comprises a first roller (21) and a second roller (22), the first roller (21) and the second roller (22) are axially arranged in parallel, the side wall of the first roller (21) and the side wall of the second roller (22) are arranged at intervals, the first roller (21) and the second roller (22) are coaxially connected with a driving motor, and a driving oil cylinder (23) capable of driving the first roller (21) and the second roller (22) to move close to each other or away from each other is arranged between the first roller (21) and the second roller (22);
a tension swing roller mechanism (5) is arranged between two adjacent rolling mechanisms (2);
The tension swing roller mechanism (5) comprises a tension adjusting roller (53), wherein a plurality of teflon rubber rings (54) are sleeved on the outer side of the tension adjusting roller (53), and the teflon rubber rings (54) are arranged at intervals along the axial direction of the tension adjusting roller (53).
2. The multistage roller press according to claim 1, wherein a first tension roller mechanism (3) and a second tension roller mechanism (4) are respectively arranged on two opposite sides of the frame (1), and a plurality of the roller pressing mechanisms (2) are arranged between the first tension roller mechanism (3) and the second tension roller mechanism (4).
3. A multistage roller press according to claim 1, characterized in that the tension pendulum roller mechanism (5) further comprises a first auxiliary roller (51) and a second auxiliary roller (52), the first auxiliary roller (51) and the second auxiliary roller (52) being arranged at intervals on both sides of the tension adjustment roller (53) in the conveying direction of the pole piece (6).
4. A multistage rolling process using a multistage rolling press according to any one of claims 1 to 3, characterized by comprising the steps of:
s1: and (3) feeding: feeding the pole piece (6) into the device;
S2: processing;
S21: and (3) adjusting: adjusting a gap between a first roller (21) and a second roller (22) in the rolling mechanism (2);
S22: and (3) rolling: sequentially passing the pole piece (6) through a plurality of rolling mechanisms (2), and rolling the pole piece (6) for a plurality of times;
S3: and (3) blanking: and outputting the pole piece (6) from the device.
5. A multi-stage rolling process according to claim 4, characterized in that in step S21, the gap between the first roll (21) and the second roll (22) in the number of rolling mechanisms (2) is sequentially reduced in the conveying direction of the pole pieces (6).
6. A multi-stage rolling process according to claim 4, wherein in step S22, the pole piece (6) is subjected to tension adjustment between two adjacent rolling processes.
7. A multi-stage rolling process according to claim 4, characterized in that in step S22, the pole piece (6) is stretched in the width direction or/and the length direction of the pole piece (6) between two adjacent rolling processes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311034764.8A CN116885110B (en) | 2023-08-16 | 2023-08-16 | Multistage roll squeezer and multistage roll pressing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311034764.8A CN116885110B (en) | 2023-08-16 | 2023-08-16 | Multistage roll squeezer and multistage roll pressing process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116885110A CN116885110A (en) | 2023-10-13 |
| CN116885110B true CN116885110B (en) | 2024-05-24 |
Family
ID=88260703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311034764.8A Active CN116885110B (en) | 2023-08-16 | 2023-08-16 | Multistage roll squeezer and multistage roll pressing process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116885110B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202423449U (en) * | 2011-11-30 | 2012-09-05 | 凯迈（江苏）机电有限公司 | Rolling processing equipment for pole piece of lithium battery |
| CN209973884U (en) * | 2019-04-25 | 2020-01-21 | 张家港市恒迪机械有限公司 | Tension adjusting device for waterproof coiled material production line |
| CN210586367U (en) * | 2019-08-22 | 2020-05-22 | 佛山市金银河智能装备股份有限公司 | Multistage tandem rolling four-roller rolling device |
| CN111477834A (en) * | 2020-04-23 | 2020-07-31 | 佛山市金银河智能装备股份有限公司 | Battery pole piece rolling device and method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104009207B (en) * | 2014-06-16 | 2016-08-17 | 浙江金开来新能源科技有限公司 | A kind of lithium battery pole slice milling train realizing twice roll-in |
| CN207655638U (en) * | 2017-11-14 | 2018-07-27 | 中航锂电（洛阳）有限公司 | A kind of battery pole piece rolling device |
| CN210280177U (en) * | 2019-06-05 | 2020-04-10 | 无锡先导智能装备股份有限公司 | Flattening device |
-
2023
- 2023-08-16 CN CN202311034764.8A patent/CN116885110B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202423449U (en) * | 2011-11-30 | 2012-09-05 | 凯迈（江苏）机电有限公司 | Rolling processing equipment for pole piece of lithium battery |
| CN209973884U (en) * | 2019-04-25 | 2020-01-21 | 张家港市恒迪机械有限公司 | Tension adjusting device for waterproof coiled material production line |
| CN210586367U (en) * | 2019-08-22 | 2020-05-22 | 佛山市金银河智能装备股份有限公司 | Multistage tandem rolling four-roller rolling device |
| CN111477834A (en) * | 2020-04-23 | 2020-07-31 | 佛山市金银河智能装备股份有限公司 | Battery pole piece rolling device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116885110A (en) | 2023-10-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100341692C (en) | Method and apparatus for making a creped tissue with improved tactile qualities while improving handling of the web | |
| CN104737349B (en) | Device and method for producing stacked electrodes | |
| US7100862B2 (en) | Roll-up machine and method | |
| US10464278B2 (en) | Method for producing corrugated board products having an oblique flute profile | |
| CN116885110B (en) | Multistage roll squeezer and multistage roll pressing process | |
| KR102503562B1 (en) | Apparatus for progressing web used in making electrode of secondary battery | |
| CN106784604A (en) | Equipment for synthesizing composite layer on surface of battery pole piece | |
| CN113078280A (en) | Double-roller compaction equipment for battery pole piece and compaction method for battery pole piece | |
| CN206999825U (en) | Carbon cloth compounding machine | |
| CN208394468U (en) | Battery pole piece rolling and flattening device | |
| CN208649209U (en) | A kind of automobile butyl rubber belt production line device | |
| KR102285230B1 (en) | Press apparatus for electrode sheet | |
| CN110607681B (en) | Full-automatic multi-layer gauze covering, cutting and filling equipment | |
| CN217035719U (en) | Strip thermal compounding device for battery/capacitor | |
| CN217414297U (en) | Electrostatic paper coating equipment for plate and strip | |
| CN217373813U (en) | Solvent-free dry type all-in-one machine | |
| CN108899585A (en) | Alternating type battery cell of lithium battery and manufacturing method thereof | |
| CN213505096U (en) | High stability coiling mechanism is used in production of polymer complex film | |
| CN208761778U (en) | A kind of coiler | |
| CN211664359U (en) | Printing production line of servo material-pulling non-plate-changing roller | |
| CN217577543U (en) | Laminating machine protection film blowing frame device | |
| CN117816742A (en) | Slitting roller press, slitting roller press line and slitting roller method for eliminating pole piece wrinkling | |
| CN108891966A (en) | A kind of coiler | |
| CN217169833U (en) | POGO PIN upper cover ultrasonic wave equipment | |
| CN210029447U (en) | Radium-shine paper stock form device of no aluminium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Country or region after: China Address after: No. 18 Dongxin Street, Dongyong Town, Nansha District, Guangzhou City, Guangdong Province, 511458 Applicant after: Guangdong Jiemeng Intelligent Equipment Co.,Ltd. Address before: No. 18 Mafa Street, Dongyong Town, Nansha District, Guangzhou City, Guangdong Province, 511458 Applicant before: Guangdong jiemeng Intelligent Equipment Co.,Ltd. Country or region before: China |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |