WO2023093267A1 - 极片成型设备 - Google Patents

极片成型设备 Download PDF

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Publication number
WO2023093267A1
WO2023093267A1 PCT/CN2022/121227 CN2022121227W WO2023093267A1 WO 2023093267 A1 WO2023093267 A1 WO 2023093267A1 CN 2022121227 W CN2022121227 W CN 2022121227W WO 2023093267 A1 WO2023093267 A1 WO 2023093267A1
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WO
WIPO (PCT)
Prior art keywords
pole piece
roller
piece forming
edge
rolling
Prior art date
Application number
PCT/CN2022/121227
Other languages
English (en)
French (fr)
Inventor
谢斌
陈仕通
卢毅
申园园
李克强
赵丰刚
Original Assignee
宁德时代新能源科技股份有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to EP22897353.3A priority Critical patent/EP4276930A1/en
Publication of WO2023093267A1 publication Critical patent/WO2023093267A1/zh
Priority to US18/239,127 priority patent/US20230411670A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0404—Machines for assembling batteries
    • H01M10/0409—Machines for assembling batteries for cells with wound electrodes
    • 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
    • H01M4/0433—Molding
    • 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

Definitions

  • the present application relates to the technical field of pole piece processing, in particular to a pole piece forming equipment.
  • Batteries are widely used in electrical devices, such as mobile phones, laptop computers, battery cars, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and electric tools, etc. Batteries can include nickel-cadmium batteries, nickel-hydrogen batteries, lithium-ion batteries, and secondary alkaline zinc-manganese batteries, among others.
  • the pole piece ensures the smooth progress of various processes in the production process of the pole piece, reduces the scrap rate in the production process of the pole piece, and improves the product quality of the pole piece. The issue of continuous improvement.
  • the application provides a pole piece forming equipment, which can improve the product quality of the pole piece and reduce the scrap rate in the production process of the pole piece.
  • This application proposes a pole piece forming equipment, including: a material feeding device, used to provide the mother pole piece; a cutting device, used to cut the mother pole piece into multiple pole pieces; multiple winding devices, used for Pulling the pole piece to run, each winding device winds up a corresponding pole piece, the cutting device is set between the feeding device and the winding device; the wrinkle removal device is set between the cutting device and the winding device,
  • the wrinkle removal device includes a first roller and a second roller arranged oppositely, the first roller includes a first rolling portion, and the first rolling portion and the second roller are used for rolling the edge of the cutting edge of the pole piece .
  • the wrinkle removal device is arranged between the cutting device and the winding device, and the wrinkle removal device includes a first roller and a second roller arranged oppositely.
  • the first rolling part and the second roller roll the slitting edge of the pole piece, which effectively reduces the risk of wrinkling of the pole piece formed after the mother pole piece is cut, improves the yield of the pole piece, and improves The safety of the battery formed by the production of pole pieces during the working process.
  • the diameter of the first rolling portion changes from small to large, and the part with the largest diameter of the first rolling portion is used to roll the edge of the cut edge; the first The part with the smaller diameter of the roller is closer to the middle position of the pole piece.
  • the diameter of the first rolling portion changes from small to large through an arc transition structure or a stepped structure. Both the arc transition structure and the step transition structure can achieve the purpose of changing the diameter of the first rolling portion from small to large.
  • the diameter of the first rolling portion first changes from small to large, and then from large to small.
  • one rolling portion can correspond to the edges of the cutting edges of the two pole pieces, which simplifies the structure of the wrinkle removing device.
  • the roller pressure of the wrinkle-removing device on the pole piece gradually decreases, so that the stress distribution of the cutting edge of the pole piece after passing through the wrinkle-removing device is more uniform, and the pole piece is further reduced. Risk of sheet wrinkling.
  • the second roller includes a second rolling portion opposite to the first rolling portion, and in the axial direction of the second roller, the diameter of the second rolling portion changes from small to large; the second roller The largest diameter portion of the wheel is opposite to the largest diameter portion of the first roller.
  • the first rolling part and the second rolling part may be set to have the same shape, and the two are arranged opposite to each other. In this way, when the wrinkle removal device rolls the cut edge of the pole piece, the force on the two sides of the pole piece is more balanced, and the stress release space along both sides of the pole piece during the wrinkle removal process is consistent, which is beneficial to the pole piece.
  • the smooth progress of sheet wrinkle removal, and at the same time reduce the possibility of wrinkling again during the rolling process of the pole sheet.
  • a flow channel is arranged inside the first roller, and the flow channel is used for circulating a heat conducting medium, and the heat conducting medium is used for heat exchange with the first roller. This facilitates better removal of wrinkles on the cutting edge of the pole piece.
  • the heating of the pole piece by the first roller can accelerate the insertion of active materials into the pole piece.
  • the heat-conducting medium exchanges heat with the first roller, so that the temperature of the surface of the first roller near the pole piece is maintained between 35°C and 40°C.
  • Such setting can ensure the stress reloading process of the pole piece and accelerate the embedding of the active material into the pole piece, while reducing the possibility of the structure of the pole piece being damaged due to excessive temperature.
  • the runner is arranged helically around the centerline of the first roller.
  • the spirally arranged flow channel has a larger area corresponding to the outer surface of the first roller, which is beneficial to improving the heat exchange rate between the heat transfer medium and the first roller.
  • the distance between the runner and the outer surface of the first roller is d, where 0 ⁇ d ⁇ 2mm. In this way, the heat exchange rate between the heat-conducting medium and the outer surface of the first roller can be increased, thereby increasing the heat exchange rate between the first roller and the pole piece.
  • the pole piece forming equipment further includes: a lithium replenishing device, disposed between the feeding device and the cutting device, and the lithium replenishing device is used to cover the lithium strip on the surface of the mother pole piece. Integrating the lithium supplementation and cutting process of the pole piece into the pole piece forming equipment can improve the structural integration of the pole piece forming equipment and simplify the operation process in the pole piece forming process.
  • the pole piece forming equipment also includes a deviation correcting device, which is used to guide the belt running direction of the pole piece; the deviation correction device is arranged between the cutting device and the wrinkle removal device; and/or, the deviation correction device is arranged in the Between the wrinkle device and the winding device.
  • a deviation correcting device which is used to guide the belt running direction of the pole piece; the deviation correction device is arranged between the cutting device and the wrinkle removal device; and/or, the deviation correction device is arranged in the Between the wrinkle device and the winding device.
  • the pole piece forming equipment further includes a burr treatment device arranged between the cutting device and the winding device, and the burr treatment device includes: a brush mechanism for removing burrs from the cutting edge; a dust collection mechanism, Used to collect burrs removed by the brush mechanism. It reduces the risk of burrs flowing freely and affecting the cleanliness of the pole piece production environment, and at the same time reduces the risk of burrs falling on the surface of the pole piece and puncturing the pole piece during subsequent pole piece processing.
  • the pole piece forming equipment also includes: a gluing mechanism, arranged between the burr processing device and the winding device, for gluing the split edge; a drying device, arranged between the gluing mechanism and the winding device Between the devices, it is used to dry the pole pieces after gluing. In this way, the exposed cutting edge of the pole piece can be avoided, and the risk of short circuit of the subsequent pole piece during use can be reduced.
  • Fig. 1 is a schematic structural view of a pole piece forming equipment provided in this embodiment
  • Fig. 2 is a schematic structural view of the pole piece rolled by the first roller and the second roller in the pole piece forming equipment provided by the embodiment of the present application;
  • Fig. 3 is a schematic structural view of the pole piece rolled by the first roller and the second roller in another pole piece forming equipment provided by the embodiment of the present application;
  • Fig. 4 is a structural schematic diagram of the pole piece rolled by the first roller and the second roller in another pole piece forming equipment provided by the embodiment of the present application;
  • Fig. 5 is a schematic cross-sectional view of the first roller in the pole piece forming equipment provided by the embodiment of the present application;
  • Fig. 6 is a structural principle diagram of another pole piece forming equipment provided by the embodiment of the present application.
  • Fig. 7 is a structural schematic diagram of another pole piece forming equipment provided by the embodiment of the present application.
  • Fig. 8 is a structural principle diagram of another pole piece forming equipment provided in the embodiment of the present application.
  • Feeding device 2. Slitting device; 3. Wrinkle removing device; 31. The first roller; 31a. The first rolling part; 31b. Runner; 32. The second roller; 32a. The second roller Pressure section; 4. Rewinding device; 5. Lithium replenishing device; 51. Lithium belt unwinding mechanism; 52. Release agent coating mechanism; 53. Pressing roller mechanism; 54. Traction film winding mechanism; 6. Deviation correction device ; 7. Burr treatment device; 71. Brush mechanism; 72. Dust collection mechanism; 8. Gluing mechanism; 9. Drying device;
  • Batteries such as lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries or magnesium-ion batteries, etc., have high energy density, high power density, many cycle times, long storage time, etc. Advantages, it has been widely used in electric devices suitable for batteries.
  • an electrical device may be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, and the like.
  • Vehicles can be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles; spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.; electric toys include fixed Type or mobile electric toys, such as game consoles, electric car toys, electric boat toys and electric airplane toys, etc.; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, for example, Electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, electric planers, and more.
  • the pole pieces of the battery need to go through processes such as coating, rolling, drying, and slitting, and some pole pieces need to be supplemented with lithium.
  • the stress release on both sides of the pole piece formed in this way is inconsistent, and the stress distribution on both sides is different, which will easily cause wrinkles such as wavy edges, collapsed edges, or serious sinking on the cutting edge of the pole piece, especially for repaired
  • the pole piece after the lithium process, the mother pole piece after lithium supplementation becomes brittle and hard, the stress difference between the two sides of the pole piece formed after slitting is greater, and the risk of wrinkling of the pole piece is higher.
  • the inventors have improved the structure of the pole piece forming equipment, and the technical solutions described in the embodiments of this application are applicable to the pole piece forming equipment.
  • FIG. 1 shows a schematic structural diagram of a pole piece forming equipment provided by an embodiment of the present application
  • FIG. 2 shows a schematic structural diagram of a first roller 31 and a second roller 32 and a rolled pole piece 120 .
  • the feeding device 1 is used to provide the mother pole piece 110 .
  • the cutting device 2 is used for cutting the mother pole piece 110 into a plurality of pole pieces 120 .
  • the winding device 4 is used to pull the pole piece 120 to run. Each winding device 4 winds up a corresponding pole piece 120 respectively.
  • the cutting device 2 is arranged between the feeding device 1 and the winding device 4 .
  • the wrinkle removing device 3 is arranged between the cutting device 2 and the winding device 4, and the wrinkle removing device 3 includes a first roller 31 and a second roller 32 arranged oppositely.
  • the first roller 31 includes a first rolling portion 31 a, and the first rolling portion 31 a and the second roller 32 are used for rolling the edge of the cut edge 120 a of the pole piece 120 .
  • the cutting device 2 cuts the mother pole piece 110 into a plurality of pole pieces 120 along the cutting edge 120a of the pole piece 120. After the cutting is completed, the edge of the cutting edge 120a of the pole piece 120 is prone to wrinkles.
  • the first rolling portion 31a of a roller 31 clamps and rolls the edge of the cutting edge 120a of the pole piece 120 together with the second roller 32. During the rolling process, the edge of the cutting edge 120a of the pole piece 120 The stress at the position is redistributed, and the folds of the cutting edge 120a are flattened.
  • first roller 31 and the second roller 32 are not limited, and the shapes of the two can be the same or different, as long as they can clamp and roll the cutting edge 120a of the pole piece 120 edge of the .
  • first roller 31 and the second roller 32 may be cylindrical, truncated cone or other irregular shapes respectively.
  • the first roller 31 and the second roller 32 can only roll the edge of the cutting edge 120a of the pole piece 120, or can form rolling pressure on the entire pole piece 120, and different rolling forms correspond to the first roller 31 Different structure from the second roller 32.
  • first rolling portion 31a corresponds to rolling the edges of the two cutting edges 120a of two adjacent pole pieces 120
  • the first roller 31 can be set to have a plurality of first rolling parts 31a, so that the edge of each slitting edge 120a has a corresponding first rolling The portion 31a is rolled.
  • one first roller 31 can also be provided with one first rolling portion 31a, and a plurality of first rollers 31 can be provided, and each first roller 31 corresponds to the cutting edge 120a of two adjacent pole pieces 120 the edge of.
  • the wrinkle removing device 3 is arranged between the cutting device 2 and the winding device 4, and the wrinkle removing device 3 includes a first roller 31 and a second roller arranged opposite to each other. 32.
  • the first rolling part 31a of the first roller 31 and the second roller 32 roll the cutting edge 120a of the pole piece 120, so that the pole piece formed after the mother pole piece 110 is cut is effectively reduced. 120 will cause the risk of wrinkles, improve the yield of the pole piece 120, and improve the safety of the battery formed by the production of the pole piece 120 during operation.
  • the diameter of the first rolling portion 31a changes from small to large, and the part with the largest diameter of the first rolling portion 31a is used for rolling the cut edge 120a. edge.
  • the portion of the first roller 31 with a smaller diameter is closer to the middle of the pole piece 120 .
  • the stress release at the edge of the cutting edge 120a of the pole piece 120 is the most complete, so the wrinkle is the most obvious.
  • the roller pressure at the position is the largest, from the edge of the cutting edge 120a of the pole piece 120 to the middle area of the pole piece 120, the first rolling part 31a of the first roller 31 and the rolling pressure of the second roller 32 on the pole piece 120 slowing shrieking.
  • the edge of the slitting edge 120a that is prone to wrinkles can be rolled through the part with the largest diameter of the first rolling portion 31a, and the edge of the slitting edge 120a of the pole piece 120 after being rolled by the wrinkle removing device 3
  • the more uniform stress distribution is beneficial to improve the wrinkle removal effect of the pole piece 120 .
  • the form of the first rolling portion 31a changing from small to large may be a step transition, a smooth transition, or a flat transition, etc., which is not limited here.
  • the diameter of the first rolling portion 31 a changes from small to large through an arc transition structure or a stepped structure.
  • the diameter of the first rolling portion 31a changes from small to large through an arc-shaped transition structure.
  • the arc-shaped transition structure can be a conical surface, or a convex arc-shaped surface, or a concave arc-shaped surface. Do limit. Arranging an arc-shaped transition structure can make the diameter of the first rolling portion 31a change more smoothly, and the transition of the rolling pressure of the first rolling portion 31a and the second rolling wheel 32 to the pole piece 120 is also smoother, which is conducive to improving the removal rate. The wrinkle removal effect of the wrinkle device 3 on the pole piece 120.
  • the first rolling portion 31a transitions through steps, and a plurality of stepped surfaces can be provided between the two ends of the first rolling portion 31a, and the step height of the stepped surfaces can be set to be small enough to avoid the edge of the stepped surface from abutting against the pole piece 120. cause damage. With such an arrangement, the wrinkle removing effect of the wrinkle removing device 3 on the cutting edge 120 a of the pole piece 120 can still be achieved.
  • one first rolling portion 31 a may correspond to one cut edge 120 a of one pole piece 120 , or may correspond to two adjacent cut edges 120 a of two adjacent pole pieces 120 .
  • the diameter of the first rolling portion 31 a first increases from small to large, and then becomes small again.
  • the position of the largest diameter of the first rolling portion 31a may correspond to the edge of the cutting edge 120a of two adjacent pole pieces 120, from the edge of the cutting edge 120a of the pole piece 120 to the pole piece on both sides
  • the diameter of the first rolling portion 31a corresponding to the pole piece 120 gradually decreases
  • the rolling pressure of the wrinkle removing device 3 on the pole piece 120 gradually decreases from the edge of the cutting edge 120a to both sides.
  • one rolling portion can correspond to the edges of the cutting edges 120 a of the two pole pieces 120 , which simplifies the structure of the wrinkle removing device 3 .
  • the roller pressure of the wrinkle removing device 3 on the pole piece 120 gradually decreases, so that the stress distribution of the cutting edge 120a of the pole piece 120 after passing through the wrinkle removing device 3 more uniform, further reducing the risk of wrinkling of the pole piece 120.
  • the second roller 32 includes a second rolling portion 32 a opposite to the first rolling portion 31 a.
  • the second rolling portion The diameter of 32a changes from small to large.
  • the portion with the largest diameter of the second roller 32 is opposite to the portion with the largest diameter of the first roller 31 .
  • first rolling portion 31a of the first roller 31 may be cylindrical, truncated cone or other irregular shapes.
  • the first rolling portion 31a may also have the same shape as the second rolling portion 32a, and the two are arranged opposite to each other.
  • the wrinkle removing device 3 rolls the cutting edge 120a of the pole piece 120
  • the forces on both sides of the pole piece 120 are more balanced, and the pole piece 120 provides space for stress release along both sides during the wrinkle removal process. Consistent, is conducive to the smooth progress of the wrinkle removal work of the pole piece 120, and at the same time reduces the possibility of wrinkling again during the rolling process of the pole piece 120.
  • the first roller 31 and the second roller 32 can be carried out at room temperature in the process of rolling the cutting edge 120a of the pole piece 120, and the first roller 31 and the second roller 32 can also be adjusted according to actual needs. Heating or cooling is not limited here.
  • a flow channel 31 b is provided inside the first roller 31 , and the flow channel 31 b is used for circulating a heat conducting medium, and the heat conducting medium is used for heat exchange with the first roller 31 .
  • the heat conduction medium in the flow channel 31 b can heat the first roller 31 or cool the first roller 31 .
  • the heat conduction medium in the flow channel 31b is used to heat the first roller 31, and the first roller 31 will heat the pole piece 120 during the process of rolling the pole piece 120, so that the pole piece 120 can be accelerated.
  • the stress reloading process of the cut edge 120a at 120 facilitates better de-wrinkling of the pole piece 120 .
  • the pole piece 120 is heated by the first roller 31, which can accelerate the embedding of the active material into the pole piece 120.
  • the heat-conducting medium exchanges heat with the first roller 31, so that the first roller 31 is maintained at a preset temperature range, and then the temperature of the pole piece 120 during the wrinkle removal process is maintained at a preset range, which can be determined according to the pole piece 120 The specific needs of the wrinkle removal process are set.
  • the heat-conducting medium exchanges heat with the first roller 31 , so that the temperature of the surface of the first roller 31 close to the pole piece 120 is maintained between 35°C and 40°C. Specifically, it may be 35°C, 38°C, 39°C, or 40°C.
  • Such setting can ensure the stress reloading process of the pole piece 120 and accelerate the embedding of the active material into the pole piece 120 , while reducing the possibility of the structure of the pole piece 120 being damaged due to excessive temperature.
  • the distribution form of the runners 31b in the first roller 31 is not limited, and may be in a labyrinth, hollow cylinder or other irregular forms, which are not limited here.
  • the flow channel 31b is spirally arranged around the centerline of the first roller 31 .
  • the flow channel 31b is arranged spirally around the center line of the first roller 31, and in the case that the flow channel 31b occupies the same volume, the spirally arranged flow channel 31b corresponds to the outer surface of the first roller 31
  • the larger area is beneficial to increase the heat exchange rate between the heat conduction medium and the first roller 31 .
  • the distance between the flow channel 31b and the outer surface of the first roller 31 is d, where 0 ⁇ d ⁇ 2mm. Specifically, d may be 0.5mm, 1mm, 1.5mm or 2mm, etc. Setting the distance between the flow channel 31b and the outer surface of the first roller 31 to meet the above relationship can increase the heat exchange rate between the heat transfer medium and the outer surface of the first roller 31, thereby increasing the heat exchange rate between the first roller 31 and the pole piece 120. exchange rate.
  • a flow channel can also be provided inside the second roller 32, and the flow channel can be arranged spirally around the center line of the second roller 32, which is different from that in the first roller
  • the flow channel 31b provided inside 31 has the same technical effect, and will not be repeated here.
  • the pole piece forming equipment also includes a lithium supplementary device 5, which is arranged between the incoming material device 1 and the slitting device 2, and the lithium supplementary device 5 is used to strip the lithium Laminated on the surface of the mother pole piece 110 .
  • the lithium replenishing device 5 includes a lithium ribbon unwinding mechanism 51 , a release agent coating mechanism 52 , a pressing roller mechanism 53 , and a traction film winding mechanism 54 .
  • the release agent coating mechanism 52 coats different types of release agents on both sides of the lithium strip, so that after the lithium strip passes through the pressing roller mechanism 53, the lithium strip is rolled and thinned, and lithium shavings are adhered to the pressing roller mechanism. 53 on.
  • the lithium ribbon is pulled by the traction film winding mechanism 54, and the traction film winding mechanism 54 can wind the traction film in the lithium ribbon.
  • the traction film winding mechanism 54 can wind the traction film in the lithium ribbon.
  • the lithium replenishment and cutting process of the pole piece 120 are integrated in the pole piece forming equipment, which can improve the structural integration of the pole piece forming equipment and simplify the operation process in the pole piece 120 forming process.
  • the pole piece forming equipment further includes a deviation correcting device 6 , and the deviation correction device 6 is used to guide the running direction of the pole piece 120 .
  • the arrangement of the deviation correcting device 6 can reduce the possibility of deviation of the pole piece 120 in the tape running process, thus improving the yield of the pole piece 120 .
  • the deviation correcting device 6 can be set at a suitable position according to needs, and there is no limitation here.
  • the deviation correcting device 6 is arranged between the cutting device 2 and the wrinkle removing device 3 . In this way, after the slitting of the pole piece 120 is completed, the pole piece 120 is rectified, so that in the subsequent wrinkle removal process, the wrinkle removal device 3 can be more accurately rolled to the edge of the cutting edge 120a of the pole piece 120, with better anti-wrinkle effect.
  • the deviation correcting device 6 is arranged between the wrinkle removing device 3 and the winding device 4 . In this way, the smooth winding of the pole piece 120 is facilitated, and the possibility of secondary wrinkles of the pole piece 120 after the wrinkle removal process is completed is reduced.
  • the pole piece forming equipment further includes a burr treatment device 7 arranged between the cutting device 2 and the winding device 4, and the burr treatment device 7 is used to remove the slitting of the pole piece 120 Burrs on edge 120a. The risk of damage to the pole piece 120 caused by burrs is reduced.
  • the burr treatment device 7 includes a brush mechanism 71 and a dust collection mechanism 72.
  • the brush mechanism 71 is used to remove burrs from the cutting edge 120a.
  • the dust collection mechanism 72 is used to collect the burrs removed by the brush mechanism 71 .
  • the dust collection mechanism 72 may be a negative pressure dust suction mechanism or the like.
  • the dust collection mechanism 72 should be used to collect them to reduce the risk of the burrs flowing freely and affecting the cleanliness of the pole piece 120 production environment. The risk of the burr falling on the surface of the pole piece 120 and piercing the pole piece 120 during the subsequent processing of the pole piece 120 can be reduced.
  • the conductive material therein will be exposed to the external environment.
  • the lithium film at the cut position of the pole piece 120 will be exposed to the external environment.
  • the pole piece forming equipment also includes a glue coating mechanism 8 and a drying device9.
  • the gluing mechanism 8 is arranged between the deburring device 7 and the winding device 4, and is used for gluing the cut edge 120a.
  • the drying device 9 is arranged between the gluing mechanism 8 and the winding device 4 for drying the glued pole piece 120 .
  • glue is applied to the cutting edge 120a of the pole piece 120, and the width of the glue can be between 1mm and 2mm.
  • the glue layer formed after gluing is dried by the drying device 9 , and finally the pole piece 120 is wound up.
  • applying glue to the cutting edge 120a of the pole piece 120 can not only reduce the risk of short circuit of the pole piece 120, but also can further remove the burrs of the cutting edge 120a.

Abstract

本申请提供一种极片成型设备，包括来料装置、分切装置、多个收卷装置以及除皱装置。来料装置提供母极片。分切装置将母极片分切为多条极片。收卷装置牵引极片走带，各收卷装置分别收卷对应的一条极片，分切装置设置于来料装置和收卷装置之间。除皱装置设置于分切装置和收卷装置之间，除皱装置包括相对设置的第一辊轮和第二辊轮，第一辊轮包括第一辊压部，第一辊压部和第二辊轮用于辊压极片的分切边的边缘。本申请提供的极片成型设备，通过第一辊轮的第一辊压部和第二辊轮对极片的分切边进行辊压，如此有效地降低了母极片分切后形成的极片产生褶皱的风险，提高极片的成品率，并提高极片生产形成的电池在工作过程中的安全性。

Description

极片成型设备
相关申请的交叉引用
本申请要求享有于2021年11月29日提交的名称为“极片成型设备”的中国专利申请202111450643.2的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本申请涉及极片加工技术领域，特别是涉及一种极片成型设备。
背景技术
电池广泛应用于用电装置，例如手机、笔记本电脑、电瓶车、电动汽车、电动飞机、电动轮船、电动玩具汽车、电动玩具轮船、电动玩具飞机和电动工具等等。电池可以包括镉镍电池、氢镍电池、锂离子电池和二次碱性锌锰电池等。
在电池技术的发展中，极片作为电池的重要组成部分，保证极片在生产过程中各项工艺的顺利进行，降低极片生产过程中废品率，提高极片的产品质量，是电池技术中持续改进的问题。
发明内容
本申请提供一种极片成型设备，能够提高极片的产品质量，降低极片生产过程中的废品率。
本申请提出了一种极片成型设备，包括：来料装置，用于提供母极片；分切装置，用于将母极片分切为多条极片；多个收卷装置，用于牵引极片走带，各收卷装置分别收卷对应的一条极片，分切装置设置于来料装置和收卷装置之间；除皱装置，设置于分切装置和收卷装置之间，除皱装置包括相对设置的第一辊轮和第二辊轮，第一辊轮包括第一辊压部，第一辊压部和第二辊轮用于辊压极片的分切边的边缘。
本申请提供的极片成型设备，将除皱装置设置于分切装置和收卷装置之间，并设置除皱装置包括相对设置的第一辊轮和第二辊轮，通过第一辊轮的第一辊压部和第二辊轮对极片的分切边进行辊压，如此有效地降低了母极片分切后形成的极片产生褶皱的风险，提高极片的成品率，并提高极片生产形成的电池在工作过程中的安全性。
在一些实施例中，在第一辊轮的轴向上，第一辊压部的直径由小变大，第一辊 压部的直径最大的部位用于辊压分切边的边缘；第一辊轮的直径较小的部位更靠近极片的中间位置。如此设置，可通过第一辊压部的直径最大的部位对容易出现褶皱的分切边的边缘进行辊压。经过除皱装置辊压后的极片的分切边处的应力分布的更加均匀，有利于提高极片的除皱效果。
在一些实施例中，第一辊压部通过弧形过渡结构或者台阶结构使直径由小变大。弧形过渡结构和台阶过渡结构都能够实现使第一辊压部的直径由小变大的目的。
在一些实施例中，在第一辊轮的轴向上，第一辊压部的直径先由小变大，然后由大变小。如此设置，可以使一个辊压部对应两条极片的分切边的边缘，简化除皱装置的结构。同时，由极片的分切边的边缘到中间，除皱装置对极片的辊压力逐渐减小，使得经过除皱装置后的极片的分切边的应力分布的更加均匀，进一步降低极片出现褶皱的风险。
在一些实施例中，第二辊轮包括与第一辊压部相对的第二辊压部，在第二辊轮的轴向上，第二辊压部的直径由小变大；第二辊轮的直径最大的部位与第一辊轮的直径最大的部位相对。可以设置第一辊压部与第二辊压部相同的形状，且二者相对设置。如此设置，除皱装置对极片的分切边进行辊压时，极片的两侧表面的受力更加平衡，极片在除皱过程中沿两侧进行应力释放的空间一致，有利于极片除皱工作的顺利进行，同时降低极片在辊压过程中再次发生褶皱的可能性。
在一些实施例中，第一辊轮内部设置有流道，流道用于流通导热介质，导热介质用于与第一辊轮热交换。如此便于更好地除去极片的分切边的褶皱，另外，对于补锂后的极片，通过第一辊轮对极片的加热，可以加快活性物质嵌入极片。
在一些实施例中，导热介质与第一辊轮热交换，以使第一辊轮靠近极片的表面温度维持在35℃～40℃之间。如此设置，可以在保证极片的应力重新加载的进程，以及加快活性物质嵌入极片的同时，降低极片因温度过高而损坏极片的结构的可能性。
在一些实施例中，流道绕第一辊轮的中心线螺旋设置。螺旋设置的流道与第一辊轮的外表面相对应的面积更大，有利于提高导热介质与第一辊轮的热交换速率。
在一些实施例中，流道与第一辊轮的外表面的间距为d，0＜d≤2mm。如此，可以提高导热介质与第一辊轮的外表面的热交换速率，进而提高第一辊轮与极片的热交换速率。
在一些实施例中，极片成型设备还包括：补锂装置，设置于来料装置和分切装置之间，补锂装置用于将锂带覆合在母极片的表面。将极片的补锂和分切工艺都集成在极片成型设备中，可以提高极片成型设备的结构集成度，简化极片成型过程中的操作工序。
在一些实施例中，极片成型设备还包括纠偏装置，纠偏装置用于引导极片的走带方向；纠偏装置设置在分切装置与除皱装置之间；和/或，纠偏装置设置在除皱装置与收卷装置之间。如此设置，具有更好的除皱效果，并降低极片除皱工艺完成后产生 二次褶皱的可能性。
在一些实施例中，极片成型设备还包括设置于分切装置和收卷装置之间的毛刺处理装置，毛刺处理装置包括：毛刷机构，用于清除分切边的毛刺；集尘机构，用于收集毛刷机构清除下的毛刺。降低毛刺任意流动而影响极片生产环境的清洁度的风险，同时可以降低毛刺落在极片的表面、在后续极片的加工过程中刺破极片的风险。
在一些实施例中，极片成型设备还包括：涂胶机构，设置在毛刺处理装置和收卷装置之间，用于对分切边涂胶；烘干装置，设置在涂胶机构和收卷装置之间，用于烘干涂胶后的极片。如此可以避免极片的分切边裸露在外，降低后续极片在使用过程中发生短路的风险。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对本申请实施例中所需要使用的附图作简单地介绍，显而易见地，下面所描述的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据附图获得其他的附图。
图1是本实施例提供的一种极片成型设备的结构示意图；
图2是本申请实施例提供的一种极片成型设备中第一辊轮和第二辊轮辊压极片的结构示意图；
图3是本申请实施例提供的另一中极片成型设备中第一辊轮和第二辊轮辊压极片的结构示意图；
图4是本申请实施例提供的又一中极片成型设备中第一辊轮和第二辊轮辊压极片的结构示意图；
图5是本申请实施例提供的极片成型设备中第一辊轮的剖视示意图；
图6是本申请实施例提供的另一种极片成型设备的结构原理图；
图7是本申请实施例提供的又一种极片成型设备的结构原理图；
图8是本申请实施例提供的再一种极片成型设备的结构原理图。
在附图中，附图未必按照实际的比例绘制。
标记说明：
1、来料装置；2、分切装置；3、除皱装置；31、第一辊轮；31a、第一辊压部；31b、流道；32、第二辊轮；32a、第二辊压部；4、收卷装置；5、补锂装置；51、锂带放卷机构；52、脱模剂涂覆机构；53、压辊机构；54、牵引膜收卷机构；6、纠偏装置；7、毛刺处理装置；71、毛刷机构；72、集尘机构；8、涂胶机构；9、烘干装置；
110、母极片；120、极片；120a、分切边。
具体实施方式
下面结合附图和实施例对本申请的实施方式作进一步详细描述。以下实施例的详细描述和附图用于示例性地说明本申请的原理，但不能用来限制本申请的范围，即本申请不限于所描述的实施例。
在本申请的描述中，需要说明的是，除非另有说明，“多个”的含义是两个以上；术语“上”、“下”、“左”、“右”、“内”、“外”等指示的方位或位置关系仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”、“第三”等仅用于描述目的，而不能理解为指示或暗示相对重要性。“垂直”并不是严格意义上的垂直，而是在误差允许范围之内。“平行”并不是严格意义上的平行，而是在误差允许范围之内。
下述描述中出现的方位词均为图中示出的方向，并不是对本申请的具体结构进行限定。在本申请的描述中，还需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是直接相连，也可以通过中间媒介间接相连。对于本领域的普通技术人员而言，可视具体情况理解上述术语在本申请中的具体含义。
电池，例如锂离子二次电池、锂离子一次电池、锂硫电池、钠锂离子电池、钠离子电池或镁离子电池等，具有能量密度高、功率密度高、循环使用次数多、存储时间长等优点，在适用于电池的用电装置中已普遍应 用。例如，用电装置可以是车辆、手机、便携式设备、笔记本电脑、轮船、航天器、电动玩具和电动工具等等。车辆可以是燃油汽车、燃气汽车或新能源汽车，新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等；航天器包括飞机、火箭、航天飞机和宇宙飞船等等；电动玩具包括固定式或移动式的电动玩具，例如，游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等；电动工具包括金属切削电动工具、研磨电动工具、装配电动工具和铁道用电动工具，例如，电钻、电动砂轮机、电动扳手、电动螺丝刀、电锤、冲击电钻、混凝土振动器和电刨等等。
在电池的生产过程中，电池的极片需要经过涂布、辊压、干燥、分切等工序，对于部分极片还需要在经过补锂。
发明人发现在极片的生产过程中，生产形成的极片的边缘存在褶皱的现象后，便对极片的成型工艺及成型设备进行了系统的分析研究，结果发现，母极片经过补锂、涂布或者辊压工艺后，内部存一定的应力。在将母极片分切形成极片的过程中，母极片在分切处的应力会得到瞬间释放，如此形成的极片的分切边无张力，而没有经过分切刀的一侧应力没有得到释放，如此形成的极片的两侧的应力释放不一致，两边的应力分布不同，易造成极片的分切边形成波浪边、塌边或者下沉严重等褶皱问题，特别是对于经过补锂工艺后的极片，补锂后的母极片变得脆而硬，分切后形成的极片的两侧边的应力差异更大，极片出现褶皱的风险更高。
基于发明人发现的上述问题，发明人对极片成型设备的结构进行了改进，本申请实施例描述的技术方案适用于极片成型设备。
图1示出了本申请实施例提供的极片成型设备的结构示意图，图2示出了第一辊轮31和第二辊轮32与辊压极片120的结构示意图。
根据本申请实施例提供的极片成型设备，如图1和图2所示，极片成型设备包括来料装置1、分切装置2、多个收卷装置4以及除皱装置3。来料装置1用于提供母极片110。分切装置2用于将母极片110分切为多条极片120。收卷装置4用于牵引极片120走带，各收卷装置4分别收卷对应的一条极片120，分切装置2设置于来料装置1和收卷装置4之间。除皱装置3设置于分切装置2和收卷装置4之间，除皱装置3包括相对设 置的第一辊轮31和第二辊轮32。第一辊轮31包括第一辊压部31a，第一辊压部31a和第二辊轮32用于辊压极片120的分切边120a的边缘。
具体地，分切装置2沿极片120的分切边120a将母极片110分切成多条极片120，分切完成后，极片120的分切边120a的边缘容易产生褶皱，第一辊轮31的第一辊压部31a与第二辊轮32一起夹持并辊压极片120的分切边120a的边缘，辊压的过程中，极片120的分切边120a的边缘处的应力重新分布，分切边120a的褶皱得以展平。
可以理解的是，第一辊轮31和第二辊轮32的结构和形状不做限制，二者形状可以相同，也可以不相同，只要能够夹持并辊压极片120的分切边120a的边缘即可。示例性地，第一辊轮31和第二辊轮32可以分别为圆柱形、圆台形或者其它不规则形状。第一辊轮31和第二辊轮32可以仅辊压极片120的分切边120a的边缘，也可以对整个极片120都能够形成辊压，不同的辊压形式对应第一辊轮31和第二辊轮32不同的结构。
需要说明的是，母极片110分切后可以形成两条或者更多条极片120，一个第一辊压部31a对应辊压两个相邻极片120的两条分切边120a的边缘，当分切后形成的极片120数量在三条以上时，可以设置第一辊轮31具有多个第一辊压部31a，以使每一个分切边120a的边缘都有对应的第一辊压部31a进行辊压。当然，也可以设置一个第一辊轮31有一个第一辊压部31a，设置多个第一辊轮31，每一个第一辊轮31对应相邻的两条极片120的分切边120a的边缘。
本申请实施例提供的极片成型设备，将除皱装置3设置于分切装置2和收卷装置4之间，并设置除皱装置3包括相对设置的第一辊轮31和第二辊轮32，通过第一辊轮31的第一辊压部31a和第二辊轮32对极片120的分切边120a进行辊压，如此有效地降低了母极片110分切后形成的极片120产生褶皱的风险，提高极片120的成品率，并提高极片120生产形成的电池在工作过程中的安全性。
在一些实施例中，在第一辊轮31的轴向上，第一辊压部31a的直径由小变大，第一辊压部31a的直径最大的部位用于辊压分切边120a的边缘。第一辊轮31的直径较小的部位更靠近极片120的中间位置。
可以理解的是，极片120的分切边120a的边缘处的应力释放最完全，因此产生褶皱的幅度也最明显，越靠近极片120的边缘位置，极片120的褶皱越严重。因此，设置第一辊压部31a的直径由小变大，并设置第一辊压部31a的直径最大的部位用于辊压分切边120a的边缘，极片120的分切边120a的边缘处的辊压力最大，由极片120的分切边120a的边缘到极片120的中间区域，第一辊轮31的第一辊压部31a和第二辊轮32对极片120的辊压力逐渐减小。如此设置，可通过第一辊压部31a的直径最大的部位对容易出现褶皱的分切边120a的边缘进行辊压，经过除皱装置3辊压后的极片120的分切边120a处的应力分布的更加均匀，有利于提高极片120的除皱效果。
第一辊压部31a由小变大的形式可以阶梯过渡，也可以光滑过渡，还可以为平面过渡等形式，这里不做限制。
在一些实施例中，第一辊压部31a通过弧形过渡结构或者台阶结构使直径由小变大。
第一辊压部31a通过弧形过渡结构使直径由小变大，弧形过渡结构可以是圆锥表面、也可以是外凸的弧形表面，当然也可以是内凹的弧形表面，这里不做限制。设置弧形过渡结构，可以使第一辊压部31a的直径变化得更加圆滑，第一辊压部31a和第二辊轮32对极片120的辊压力过渡得也更加平滑，有利于提高除皱装置3对极片120的除皱效果。
第一辊压部31a通过阶梯过渡，可以在第一辊压部31a的两端之间设置多个台阶面，台阶面的阶梯高度可以设置得足够小，以避免台阶面的边缘对极片120造成损伤。如此设置，依然能够实现除皱装置3对极片120的分切边120a的除皱效果。
可以理解的是，一个第一辊压部31a可以对应一条极片120的一个分切边120a，也可以对应相邻两条极片120的两个相邻的分切边120a。
在另一些实施例中，如图3所示，在第一辊轮31的轴向上，第一辊压部31a的直径先由小变大，然后又大变小。
可以理解的是，第一辊压部31a的直径最大的位置可以对应相邻两条极片120的分切边120a的边缘，由极片120的分切边120a的边缘到两 侧的极片120的中间方向，极片120对应的第一辊压部31a的直径逐渐减小，则由分切边120a的边缘到两侧，除皱装置3对极片120的辊压力逐渐减小。如此设置，可以使一个辊压部对应两条极片120的分切边120a的边缘，简化除皱装置3的结构。同时，由极片120的分切边120a的边缘到中间，除皱装置3对极片120的辊压力逐渐减小，使得经过除皱装置3后的极片120的分切边120a的应力分布的更加均匀，进一步降低极片120出现褶皱的风险。
在一些实施例中，如图4所示，第二辊轮32包括与第一辊压部31a相对的第二辊压部32a，在第二辊轮32的轴向上，第二辊压部32a的直径由小变大。第二辊轮32的直径最大的部位于第一辊轮31的直径最大的部位相对。
可以理解的是，第一辊轮31的第一辊压部31a可以是圆柱形、圆台形或者其它不规则的形状。
可选地，第一辊压部31a也可以是与第二辊压部32a相同的形状，且二者相对设置。如此设置，除皱装置3对极片120的分切边120a进行辊压时，极片120的两侧表面的受力更加平衡，极片120在除皱过程中沿两侧进行应力释放的空间一致，有利于极片120除皱工作的顺利进行，同时降低极片120在辊压过程中再次发生褶皱的可能性。
第一辊轮31和第二辊轮32在进行辊压极片120的分切边120a的过程中，可以在室温下进行，也可以视实际需要对第一辊轮31和第二辊轮32进行加热或者冷却，这里不做限制。
在一些可选的实施例中，如图5所示，第一辊轮31内部设置有流道31b，流道31b用于流通导热介质，导热介质用于与第一辊轮31热交换。
具体地，流道31b内的导热介质可以对第一辊轮31进行加热，也可以对第一辊轮31进行冷却。示例性地，流道31b内的导热介质用于对第一辊轮31进行加热，第一辊轮31在辊压极片120的过程中，会对极片120进行加热，如此可以加快极片120分切边120a的应力重新加载的进程，便于更好地除去极片120的褶皱。另外，对于补锂后的极片120，通 过第一辊轮31对极片120加热，可以加快活性物质嵌入极片120。
导热介质与第一辊轮31进行热交换，以使第一辊轮31维持在预设的温度范围，进而使极片120在除皱过程中的温度维持在预设范围，可以根据极片120除皱过程中的具体需求进行设置。
在一些可选的实施例中，导热介质与第一辊轮31热交换，以使第一辊轮31靠近极片120的表面温度维持在35℃～40℃之间。具体地，可以为35℃、38℃、39℃或者40℃等。如此设置，可以在保证极片120的应力重新加载的进程，以及加快活性物质嵌入极片120的同时，降低极片120因温度过高而损坏极片120的结构的可能性。
流道31b在第一辊轮31内的分布形式不做限制，可以迷宫型、空心柱体型或者其它不规则型式，这里不做限制。
在一些可选的实施例中，流道31b绕第一辊轮31的中心线螺旋设置。
可以理解的是，设置流道31b绕第一辊轮31的中心线螺旋设置，在流道31b占用体积相同的情况下，螺旋设置的流道31b与第一辊轮31的外表面相对应的面积更大，有利于提高导热介质与第一辊轮31的热交换速率。
可以理解的是，流道31b距离第一辊轮31的外表面的间距越小，则流道31b内的导热介质与第一辊轮31的外表面的热交换速率越快。在一些可选的实施例中，流道31b与第一辊轮31的外表面的间距为d，0＜d≤2mm。具体地，d可以为0.5mm、1mm、1.5mm或者2mm等。设置流道31b与第一辊轮31的外表面的间距满足上述关系，可以提高导热介质与第一辊轮31的外表面的热交换速率，进而提高第一辊轮31与极片120的热交换速率。
需要说明的是，在一些可选的实施例中，也可以在第二辊轮32的内部设置流道，并设置流道绕第二辊轮32的中心线螺旋设置，与在第一辊轮31的内部设置流道31b具有同样的技术效果，在此不再赘述。
在一些实施例中，如图6所示，极片成型设备还包括补锂装置5，补锂装置5设置于来料装置1和分切装置2之间，补锂装置5用于将锂带 覆合在母极片110的表面。
具体地，补锂装置5包括锂带放卷机构51、脱模剂涂覆机构52、压辊机构53、以及牵引膜收卷机构54。脱模剂涂覆机构52在锂带的两面涂覆不同种类的脱模剂，以使锂带经过压辊机构53后，锂带被辊压变薄，并将锂屑粘附在压辊机构53上。锂带被牵引膜收卷机构54牵引，牵引膜收卷机构54可以收卷锂带中的牵引膜。压辊机构53辊压母极片110的过程中，将锂屑转移到母极片110的表面，完成母极片110的补锂过程。
通过设置补锂装置5，将极片120的补锂和分切工艺都集成在极片成型设备中，可以提高极片成型设备的结构集成度，简化极片120成型过程中的操作工序。
在一些实施例中，如图7所示，极片成型设备还包括纠偏装置6，纠偏装置6用于引导极片120的走带方向。设置纠偏装置6，可以降低极片120在走带过程中出现走偏的可能性，如此可以提高极片120的成品率。
可以理解的是，纠偏装置6可以根据需要设置在合适的位置，这里不做限制。
在一些可选的实施例中，纠偏装置6设置在分切装置2与除皱装置3之间。如此，极片120分切完成后，对极片120进行纠偏，便于后续在除皱过程中，除皱装置3能够更加精准地辊压到极片120的分切边120a的边缘，具有更好的除皱效果。
在另一些实施例中，纠偏装置6设置在除皱装置3与收卷装置4之间。如此，便于极片120的顺利收卷，降低极片120除皱工艺完成后产生二次褶皱的可能性。
在一些实施例中，如图8所示，极片成型设备还包括设置于分切装置2和收卷装置4之间的毛刺处理装置7，毛刺处理装置7用于清除极片120的分切边120a的毛刺。降低毛刺对极片120造成损伤的风险。
毛刺处理装置7的具体结构不做限制，只要能够清除分切边120a的毛刺即可。在一可选的实施例中，毛刺处理装置7包括毛刷机构71和 集尘机构72。毛刷机构71用于清除分切边120a的毛刺。集尘机构72用于收集毛刷机构71清除下的毛刺。具体地，集尘机构72可以是负压吸尘机构等。
可以理解的是，毛刷机构71清除下的毛刺，不能任由其自由流动，应该采用集尘机构72对其进行收集，降低毛刺任意流动而影响极片120生产环境的清洁度的风险，同时可以降低毛刺落在极片120的表面、在后续极片120的加工过程中刺破极片120的风险。
可以理解的是，极片120分切后，其中的导电物质会裸露在外部环境中，比如对于补锂后的极片120，极片120分切处的锂膜裸露在外部环境中。
为了避免极片120的分切边120a裸露在外，降低后续极片120短路的风险，在一些可选的实施例中，请继续参阅图8，极片成型设备还包括涂胶机构8和烘干装置9。涂胶机构8设置在毛刺处理装置7和收卷装置4之间，用于对分切边120a涂胶。烘干装置9设置在涂胶机构8和收卷装置4之间，用于烘干涂胶后的极片120。具体地，在对极片120的分切边120a进行毛刺处理后，再对极片120的分切边120a进行涂胶，涂胶的宽度可以为1mm到2mm之间。涂胶完成后，通过烘干装置9将涂胶后形成的胶层烘干，最后对极片120进行收卷。
可以理解的是，对极片120的分切边120a进行涂胶不但可以降低极片120发生短路的风险，还可以进一步去除分切边120a的毛刺。
虽然已经参考优选实施例对本申请进行了描述，但在不脱离本申请的范围的情况下，可以对其进行各种改进并且可以用等效物替换其中的部件。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (13)

  1. 一种极片成型设备，包括：
    来料装置，用于提供母极片；
    分切装置，用于将所述母极片分切为多条极片；
    多个收卷装置，用于牵引所述极片走带，各所述收卷装置分别收卷对应的一条所述极片，所述分切装置设置于所述来料装置和所述收卷装置之间；
    除皱装置，设置于所述分切装置和所述收卷装置之间，所述除皱装置包括相对设置的第一辊轮和第二辊轮，所述第一辊轮包括第一辊压部，所述第一辊压部和所述第二辊轮用于辊压所述极片的分切边的边缘。
  2. 根据权利要求1所述的极片成型设备，其中，在所述第一辊轮的轴向上，所述第一辊压部的直径由小变大，所述第一辊压部的直径最大的部位用于辊压所述分切边的边缘；所述第一辊轮的直径较小的部位更靠近所述极片的中间位置。
  3. 根据权利要求1或2所述的极片成型设备，其中，所述第一辊压部通过弧形过渡结构或者台阶结构使直径由小变大。
  4. 根据权利要求1或2所述的极片成型设备，其中，在所述第一辊轮的轴向上，所述第一辊压部的直径先由小变大，然后由大变小。
  5. 根据权利要求1至4任一项所述的极片成型设备，其中，所述第二辊轮包括与所述第一辊压部相对的第二辊压部，在所述第二辊轮的轴向上，所述第二辊压部的直径由小变大；所述第二辊轮的直径最大的部位与所述第一辊轮的直径最大的部位相对。
  6. 根据权利要求1至5任一项所述的极片成型设备，其中，所述第一辊轮内部设置有流道，所述流道用于流通导热介质，所述导热介质用于与所述第一辊轮热交换。
  7. 根据权利要求6所述的极片成型设备，其中，所述导热介质与所述第一辊轮热交换，以使所述第一辊轮靠近所述极片的表面温度维持在35℃～40℃之间。
  8. 根据权利要求6或7所述的极片成型设备，其中，所述流道绕所述第一辊轮的中心线螺旋设置。
  9. 根据权利要求8所述的极片成型设备，其中，所述流道与所述第一辊轮的外表面的间距为d，0＜d≤2mm。
  10. 根据权利要求1至9任一项所述的极片成型设备，其中，还包括：
    补锂装置，设置于所述来料装置和所述分切装置之间，所述补锂装置用于将锂带覆合在所述母极片的表面。
  11. 根据权利要求1至10任一项所述的极片成型设备，其中，还包括纠偏装置，所述纠偏装置用于引导所述极片的走带方向；
    所述纠偏装置设置在所述分切装置与所述除皱装置之间；和/或，所述纠偏装置设置在所述除皱装置与所述收卷装置之间。
  12. 根据权利要求1至11任一项所述的极片成型设备，其中，
    所述极片成型设备还包括设置于所述分切装置和所述收卷装置之间的毛刺处理装 置，所述毛刺处理装置包括：
    毛刷机构，用于清除所述分切边的毛刺；
    集尘机构，用于收集所述毛刷机构清除下的所述毛刺。
  13. 根据权利要求12所述的极片成型设备，其中，所述极片成型设备还包括：
    涂胶机构，设置在所述毛刺处理装置和所述收卷装置之间，用于对所述分切边涂胶；
    烘干装置，设置在所述涂胶机构和所述收卷装置之间，用于烘干涂胶后的所述极片。
PCT/CN2022/121227 2021-11-29 2022-09-26 极片成型设备 WO2023093267A1 (zh)

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JP2016018647A (ja) * 2014-07-08 2016-02-01 株式会社豊田自動織機 ロールプレス装置
CN106505180A (zh) * 2016-12-28 2017-03-15 珠海银隆新能源有限公司 一种电池极片的辊压装置及方法
CN110676426A (zh) * 2019-09-27 2020-01-10 东莞汇洋动力科技有限公司 一种电池极片辊压装置及方法
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CN203410045U (zh) * 2013-09-12 2014-01-29 东莞新能源科技有限公司 辊及辊压机
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