WO2023273398A1 - 极片成型方法及设备 - Google Patents

极片成型方法及设备 Download PDF

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Publication number
WO2023273398A1
WO2023273398A1 PCT/CN2022/079762 CN2022079762W WO2023273398A1 WO 2023273398 A1 WO2023273398 A1 WO 2023273398A1 CN 2022079762 W CN2022079762 W CN 2022079762W WO 2023273398 A1 WO2023273398 A1 WO 2023273398A1
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WO
WIPO (PCT)
Prior art keywords
cutting
base material
tab
pole piece
main body
Prior art date
Application number
PCT/CN2022/079762
Other languages
English (en)
French (fr)
Inventor
仇少军
廖能武
郭超
吴铁锋
Original Assignee
宁德时代新能源科技股份有限公司
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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 EP22831229.4A priority Critical patent/EP4177986A1/en
Priority to JP2023508062A priority patent/JP7392199B2/ja
Priority to KR1020237004171A priority patent/KR102632910B1/ko
Publication of WO2023273398A1 publication Critical patent/WO2023273398A1/zh
Priority to US18/184,010 priority patent/US11848436B2/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P23/00—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36—Removing material
    • B23K26/38—Removing material by boring or cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B5/00—Cleaning by methods involving the use of air flow or gas flow
    • B08B5/04—Cleaning by suction, with or without auxiliary action
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/16—Removal of by-products, e.g. particles or vapours produced during treatment of a workpiece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36—Removing material
    • B23K26/40—Removing material taking account of the properties of the material involved
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/70—Auxiliary operations or equipment
    • B23K26/702—Auxiliary equipment
    • 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
    • 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
    • H01M4/0402—Methods of deposition of the material
    • H01M4/0404—Methods of deposition of the material by coating on electrode collectors
    • 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
    • H01M4/64—Carriers or collectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/564—Terminals characterised by their manufacturing process
    • H01M50/566—Terminals characterised by their manufacturing process by welding, soldering or brazing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/34—Coated articles, e.g. plated or painted; Surface treated articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/36—Electric or electronic devices
    • B23K2101/38—Conductors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/08—Non-ferrous metals or alloys
    • B23K2103/10—Aluminium or alloys thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/08—Non-ferrous metals or alloys
    • B23K2103/12—Copper or alloys thereof
    • 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 battery manufacturing, in particular, to a pole piece forming method and equipment.
  • Lithium batteries are widely used in electronic products, vehicles, aerospace and other fields. As the application environment and conditions become more and more complex, higher requirements are put forward for the safety performance, energy density and production cost of batteries.
  • the quality of the forming quality of the pole piece of the lithium-ion battery has a great influence on the safety performance, energy sealing and production cost of the battery. Therefore, how to improve the forming quality of the pole piece has become an urgent problem to be solved in the battery manufacturing process. .
  • Embodiments of the present application provide a pole piece forming method and equipment to improve the pole piece forming quality.
  • an embodiment of the present application provides a pole piece forming method, the pole piece includes a main body and a tab, the tab protrudes from the edge of the main body to the main body, and the pole piece Forming methods include:
  • the forming of the pole piece is realized in two steps.
  • the first step is to separate the tab from the edge material.
  • the shaking of the edge material has little effect on the tab, greatly reducing the risk of damage caused by the edge material.
  • Vibration causes the tab to be deformed and the tab is pulled and damaged by the edge material, resulting in the risk of a decrease in the product qualification rate, and can also improve the quality of the pole piece forming; after the edge material is separated from the tab, the edge material is cut to make the edge The material part is separated from the main part to complete the pole piece cutting.
  • the tab cutting of the base material includes:
  • the base material is cut several times, and each cut forms a group of tangent lines on the base material that separates one of the tabs from the trim portion.
  • each cutting forms a group of slitting lines that separate a tab from the trim, so that each tab can be separated from the trim, so that each tab is affected by the shaking of the trim Smaller, which reduces the risk of deformation of the base material at the lug and damage of the tab being pulled by the edge material due to the shaking of the edge material, thereby improving the pass rate and quality of the pole piece.
  • the multiple cutting of the substrate includes:
  • the base material is cut multiple times, and each cut forms a part separating one of the tabs from the trim part on the base material. Component tangent.
  • the base material is cut multiple times during the process of transferring the base material along the first direction, that is, the base material is moved and the tab is cut at the same time, which can improve the efficiency of tab cutting.
  • the cutting the substrate multiple times during the process of transferring the substrate along the first direction includes:
  • the substrate is cut multiple times by the cutting device reciprocating along the second direction;
  • the first direction intersects the second direction.
  • the intersection of the first direction of substrate transfer and the second direction of cutting tabs can form tabs with a specific profile and form tabs in a specific direction of the substrate to meet different production and use requirements.
  • the cutting device reciprocates along the second direction to cut the tabs, which not only makes the profile of each tab uniform, but also improves the cutting efficiency of the tabs.
  • the base material is cut multiple times, that is, the base material is moved and the tab is cut at the same time, which can improve the tab cutting efficiency.
  • each component cut line comprises a first cut line and a second cut line
  • the first base material is formed by cutting the base material from a first root position of the tab extending along a first side of the tab to a first position beyond an edge of the base material in the width direction. slitting line;
  • the second base material is formed by cutting the base material from a second position extending beyond the widthwise edge of the base material along the second side of the tab to a second root position of the tab, to form the second tangent line.
  • the first cutting line separating the tab and the trim part is formed by cutting from the first root position of the tab along the first side of the tab to the edge beyond the width direction of the base material.
  • the second parting line of the tab and the trim part is formed by cutting from the second position extending beyond the edge of the width direction of the base material along the second side of the tab to the second root position of the tab, then the first part
  • the tangent line and the second slitting line form two discontinuous edge material segments located on the first side and the second side of the tab, so as to adapt to different pole piece forming processes.
  • each component cut line includes a third cut line, a fourth cut line and a fifth cut line, and the third cut line and the fifth cut line are respectively connected to the Both ends of the fourth tangent line;
  • the third slitting line, the fourth slitting line and the fifth slitting line jointly separate one tab from the trim part.
  • the third cutting line separating the tab and the edge part is formed by cutting from the first root of the tab along the first side of the tab to the top edge of the tab, separating the tab and the edge
  • the fourth cutting line of the material part is formed by cutting the base material along the top edge of the tab
  • the fifth cutting line separating the tab and the edge part is extended from the top edge of the tab along the second side of the tab If the second root of the pole ear is cut and formed, the edge material formed by the third, fourth, and fifth slitting lines is a continuous edge material, so as to adapt to different pole piece forming processes.
  • every two adjacent tabs have adjacent first root portions and second root portions;
  • the trimming of the trim portion of the base material to separate the trim portion from the main body includes:
  • the base material is cut along a line between the adjacent first root portion and the second root portion, so as to separate the trim portion from the main body portion.
  • the side material part and the main part are separated along the connecting line between the adjacent first root part and the second root part, so that the contour of the main part formed by cutting is regular, and the forming quality of the pole piece is improved.
  • the pole piece forming method further includes:
  • the first negative pressure dust removal treatment When cutting the tabs of the base material, perform the first negative pressure dust removal treatment; when cutting the edge material part of the base material, perform the second negative pressure dust removal treatment; the first negative pressure dust removal treatment
  • the negative pressure of the negative pressure is less than or equal to the negative pressure of the second negative pressure dust removal treatment.
  • negative pressure dust removal treatment is carried out when cutting the lugs of the base material and when cutting the edge part of the base material, which can ensure the cleanliness of the pole piece forming environment and reduce the generation of dust generated during the cutting of the base material.
  • the impact of dust on the pole piece The amount of dust generated when cutting the tabs of the base material is less than the amount of dust generated when cutting the side material of the base material, so the negative pressure of the first negative pressure dust removal is smaller than that of the second negative pressure dust removal.
  • the pressure can not only meet the needs of dust removal, but also play a role in energy saving and cost saving.
  • the embodiment of the present application provides a pole piece forming equipment, including:
  • the cutting device is configured to perform lug cutting on the base material, so that the base material forms a main body part, a trim part connected to the main body part, and a trim part connected to the main body part and connected to the trim part a plurality of tabs separated from each other; and being configured to perform trimming of the base material to separate the trim portion from the main body.
  • the cutting device can cut the base material in two steps.
  • the first step is to cut the tabs of the base material so that the tabs are separated from the edge material.
  • the edge material The vibration of the part has little effect on the tabs, which greatly reduces the risk of the deformation of the base material at the tabs and the damage of the tabs being pulled by the tabs due to the vibration of the side material, which will lead to a decrease in the product qualification rate.
  • the cutting device then cuts the edge part of the base material to separate the edge part from the main part, and completes the pole piece cutting.
  • the cutting device includes a first cutting device and a second cutting device
  • the first cutting device is configured to perform tab cutting on the base material, so that the base material forms the main body part, the trim part connected to the main body part, and the main body part. a plurality of tabs that are connected and separated from the scrap portion;
  • the second cutting device is configured to cut off the trim portion of the base material, so as to separate the trim portion from the main body portion.
  • different cutting devices are used for cutting the tabs of the base material and cutting the edge parts of the base material, so that the steps of cutting the tabs and cutting the edge parts do not affect each other, which is conducive to forming High quality pole piece.
  • the first cutting device and the second cutting device can be independently controlled, making the operation of the pole piece forming equipment more flexible.
  • the first cutting device and the second cutting device can work at the same time, that is, in the process of the first cutting device cutting the tabs on the base material, the second cutting device can cut the leftover parts that have been separated from the tabs It is separated from the main body, thereby improving the production efficiency of the pole piece.
  • the pole piece forming equipment further includes a transfer device configured to transfer the base material along a first direction.
  • the transfer device transfers the base material so that the cutting device can form tabs at different positions of the base material, so as to facilitate the formation of multi-tab electrode pieces.
  • the cutting device can also perform lug cutting and edge cutting of the substrate during the process of moving the substrate by the transfer device, which can improve the cutting efficiency and further improve the production efficiency of the pole piece.
  • the second cutting device is arranged downstream of the first cutting device
  • the first cutting device is configured to tab-cut the substrate during the process of transferring the substrate along the first direction by the transfer device;
  • the second cutting device is configured to cut the base material at the edge during the process of the transfer device moving the base material along the first direction.
  • the second cutting device is arranged downstream of the first cutting device, and the part of the base material that has completed the tab cutting can be moved to the second cutting device under the action of the transfer device, and is transferred to the second cutting device by the first cutting device.
  • the second cutting device cuts the edge part, so that the tab cutting of the base material and the edge material cutting of the base material can be carried out continuously, and the first cutting device can continuously carry out the tab cutting of the base material,
  • the second cutting device can continuously cut the edge part of the base material, which can improve the cutting efficiency and further improve the production efficiency of the pole piece.
  • At least one of the first cutting device and the second cutting device is a laser cutting device.
  • At least one of the first cutting device and the second cutting device is a laser cutting device
  • the laser cutting device has the advantages of good cutting quality, high cutting precision, fast cutting speed, and low post-maintenance cost Etc.
  • the pole piece forming equipment further includes a dust removal device configured to remove dust generated on the substrate when the cutting device cuts the substrate. of dust.
  • the dust generated during cutting is removed by the dust removal device, which can ensure the cleanliness of the forming environment of the pole piece and reduce the influence of the dust generated during the cutting of the base material on the pole piece.
  • the dust removal device includes a first dust removal device and a second dust removal device
  • the first dust removal device is configured to remove dust generated on the substrate when the first cutting device tab-cuts the substrate;
  • the second dust removal device is configured to remove dust generated on the base material when the second cutting device cuts the edge part of the base material.
  • the first cutting device and the second cutting device are respectively provided with a first dust removal device and a second dust removal device, so that the dust removal effect is better.
  • the first dust removal device includes a first negative pressure generating device
  • the second dust removal device includes a second negative pressure generating device
  • when the second negative pressure generating device works The negative pressure is greater than or equal to the negative pressure when the first negative pressure generating device is working.
  • the dust concentration of the gas after negative pressure dedusting is low, which can effectively prevent or reduce the wear of the device.
  • the negative pressure delivery is simple and easy to realize.
  • the pole piece forming equipment further includes a waste material guiding device configured to remove the edge material after the edge material part is separated from the main body. lead to the waste collection point.
  • the waste material guide device can promptly lead the edge material part to the waste material collection place after the edge material part is separated from the main part, so as to improve the working efficiency.
  • Fig. 1 is the structural representation of pole piece
  • Fig. 2 is a schematic diagram of a cutting path for pole piece forming in the prior art
  • Fig. 3 is a schematic diagram of another cutting path of pole piece forming in the prior art
  • Fig. 4 is a flowchart of a pole piece forming method provided by some embodiments of the present application.
  • Fig. 5 is a flowchart of a pole piece forming method provided by other embodiments of the present application.
  • Fig. 6 is a schematic diagram of the trajectory of pole piece cutting provided by other embodiments of the present application.
  • Fig. 7 is a schematic diagram of the base material provided by other embodiments of the present application being cut and forming intermittent edge parts;
  • Fig. 8 is a flow chart of a pole piece forming method provided in some other embodiments of the present application.
  • Fig. 9 is a schematic diagram of the trajectory of pole piece cutting provided by some other embodiments of the present application.
  • Fig. 10 is a schematic diagram of the substrate provided by some other embodiments of the present application being cut and forming a continuous trim portion;
  • Fig. 11 is a flow chart of a pole piece forming method with a dust removal step provided by some further embodiments of the present application.
  • Fig. 12 is a schematic structural view of pole piece forming equipment provided by some embodiments of the present application.
  • Fig. 13 is a schematic structural view of the first negative pressure generating mechanism provided by some embodiments of the present application.
  • Fig. 14 is a structural schematic diagram of the second viewing angle of the first negative pressure generating mechanism provided by some embodiments of the present application.
  • Fig. 15 is a schematic structural diagram of a dust removal device including two first negative pressure generating mechanisms provided by some embodiments of the present application;
  • Fig. 16 is a schematic structural diagram of a waste guiding device provided by some embodiments of the present application.
  • Icon 100-pole piece; 10-main body; 20-pole ear; 21-root edge; 211-first root; 212-second root; 22-top edge; 23-first side; 24-second Side; 1000-substrate; 200-edge material; 210-bottom; 3000-electrode forming equipment; 3100-cutting device; 3110-first cutting device; 3120-second cutting device; 3200- Transfer device; 3210-transfer roller; 3300-dust removal device; 3310-first dust removal device; 3311-first negative pressure generating mechanism; 33111-adsorption support; 33112-dust exhaust pipe; ;33115-vacuum hole; 33116-cutting surface; 33117-cutting hole; 3320-second dust removal device; 3330-waste guide device; 3331-installation frame; 3335-driver; 3400-waste collection; A-first direction; B-second direction; O1-first position; O2-second position.
  • the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that is usually placed when the product of the application is used, or the orientation or positional relationship of this application.
  • Orientations or positional relationships commonly understood by those skilled in the art are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood For the limitation of this application.
  • the terms “first”, “second”, “third”, etc. are only used for distinguishing descriptions, and should not be construed as indicating or implying relative importance.
  • “Plurality” in this application refers to two or more (including two).
  • the battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, which are not limited in the embodiments of the present application.
  • the battery cell can be in the form of a cylinder, a flat body, a cuboid or other shapes, which is not limited in this embodiment of the present application.
  • Battery cells are generally divided into three types according to packaging methods: cylindrical battery cells, square square battery cells and pouch battery cells, which are not limited in this embodiment of the present application.
  • the battery cell includes an electrode assembly and an electrolyte, and the electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator.
  • a battery cell works primarily by moving metal ions between the positive and negative plates.
  • the positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer, the positive electrode active material layer is coated on the surface of the positive electrode current collector, and the positive electrode current collector that is not coated with the positive electrode active material layer protrudes from the positive electrode collector that has been coated with the positive electrode active material layer , the positive electrode current collector not coated with the positive electrode active material layer serves as at least part of the positive electrode tab.
  • the positive tab of the positive electrode sheet is a positive current collector that is not coated with a positive active material layer.
  • the positive tab in order to ensure the structural strength of the positive tab, includes an uncoated positive active material layer.
  • the positive electrode current collector of the material layer and the positive electrode current collector partially coated with the positive electrode active material layer.
  • the material of the positive electrode current collector can be aluminum
  • the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate.
  • the negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, the negative electrode active material layer is coated on the surface of the negative electrode current collector, and the negative electrode current collector that is not coated with the negative electrode active material layer protrudes from the negative electrode collector that has been coated with the negative electrode active material layer , the negative electrode collector not coated with the negative electrode active material layer serves as at least part of the negative electrode tab.
  • the negative electrode tab of the negative electrode sheet is a negative electrode current collector that is not coated with a negative electrode active material layer.
  • the negative electrode tab includes an uncoated negative electrode active material layer. The negative electrode current collector of the material layer and the positive electrode current collector partially coated with the negative electrode active material layer.
  • the material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon or silicon. In order to ensure that a large current is passed without fusing, the number of positive pole tabs is multiple and stacked together, and the number of negative pole tabs is multiple and stacked together.
  • the material of the isolation film may be PP (polypropylene, polypropylene) or PE (polyethylene, polyethylene).
  • the electrode assembly may be a wound structure or a laminated structure, which is not limited in the embodiment of the present application.
  • the positive plate is formed as follows:
  • the formed positive electrode tab may include a positive electrode active material layer, or may not include a positive electrode active material layer.
  • the negative electrode sheet is formed as follows:
  • the formed negative electrode tab may include a negative electrode active material layer, or may not include a negative electrode active material layer.
  • the formed pole piece 100 (positive pole piece 100 or negative pole piece 100 ) includes a main body 10 and a tab 20 , and the tab 20 protrudes from the edge of the main body 10 to the main body 10 .
  • Each tab 20 has a root 21 connected to the main body 10 , and along the extension direction of the root 21 , each tab 20 has a first root 211 and a second root 212 located at two ends of the root 21 .
  • Each tab 20 has a top side 22 arranged opposite to the root side 21 , and the relative direction between the root side 21 and the top side 22 corresponds to the height direction of the tab 20 .
  • Each tab 20 has a first side 23 and a second side 24 arranged opposite to each other.
  • One end of the first side 23 intersects the root 21 at the first root 211 , and the other end of the first side 23 meets the top. 22 intersects, one end of the second side 24 intersects the root 21 at the second root 212, the other end of the second side 24 intersects the top 22, and the opposite direction of the first side 23 and the second side is the corresponding pole
  • the width direction of the ear 20 is the width direction of the ear 20.
  • the straight edge cutting is performed first so that the bottom edge 210 of the trim portion 200 is separated from the main body 10 , and then the first root portion 211 of the tab 20 is Cutting along the first side 23 of the tab 20 to the top side 22 of the tab 20 , after the cutting device 3100 moves a certain distance relative to the substrate 1000 , it cuts from the top side 22 of the tab 20 along the second side of the tab 20 The side 24 is cut to the other second root 212 , and finally the side material 200 is separated from the tab 20 to form a tab 20 . This method does not need to cut the top edge 22 of the tab 20 .
  • the trim part 200 is unstable due to airflow. , mechanical vibration and other reasons, the edge material part 200 will vibrate. Since the edge material part 200 is connected with at least one side of the tab 20, the vibration of the edge material part 200 will drive the tab 20 to vibrate, so that the edge material part 200 will continue to vibrate. Pulling the tab 20 will cause the tab 20 to be deformed or even damaged, resulting in a decrease in the qualified rate of the product.
  • the embodiment of the present application provides a technical solution.
  • the vibration of the edge material part 200 is greatly reduced. 20 is deformed and the tab 20 is pulled and damaged by the edge material 200 , resulting in a risk of a decrease in the product qualification rate, which can also improve the molding quality of the pole piece 100 .
  • the pole piece 100 forming method includes:
  • Step S100 cutting the tab 20 on the base material 1000, so that the base material 1000 forms the main body 10, the trim part 200 connected to the main body 10, and a plurality of parts connected to the main body 10 and separated from the trim part 200 pole ear 20.
  • the base material 1000 includes a positive electrode current collector and a positive electrode active material layer coated on the surface of the positive electrode current collector, and the width of the positive electrode active material layer is smaller than that of the positive electrode current collector. If the negative electrode sheet 100 is formed by the forming method of the electrode sheet 100, the base material 1000 includes the negative electrode current collector and the negative electrode active material layer coated on the surface of the negative electrode current collector, and the width of the negative electrode active material layer is less than the width of the negative electrode current collector .
  • step S200 the trimming portion 200 is cut from the substrate 1000 to separate the trimming portion 200 from the main body 10 .
  • the forming of the pole piece 100 is realized in two steps.
  • the first step is to separate the tab 20 from the trim part 200.
  • the vibration of the trim part 200 has little effect on the tab 20
  • greatly reducing the 200 shaking causes the tab 20 to deform and the tab 20 is pulled and damaged by the edge material part 200, resulting in the risk of a decrease in the product qualification rate, and can also improve the molding quality of the pole piece 100.
  • the edge material part 200 is separated from the tab 20, the edge The material portion 200 is cut to separate the side material portion 200 from the main body 10 , and the cutting of the pole piece 100 is completed.
  • the tab 20 is cut on the base material 1000 so that the first side 23 and the second side 24 of the tab 20 are separated from the edge material 200 , and it is necessary to cut along a certain track when cutting the edge material 200
  • Cutting to the first root portion 211 and the second root portion 212 can complete the separation of the side material portion 200 from the main body portion 10, and there is no need to turn and cut at the positions of the first root portion 211 and the second root portion 212, saving time for turning and cutting , thereby shortening the forming time of the pole piece 100 and improving the production efficiency of the pole piece 100 .
  • cutting the tab 20 of the substrate 1000 includes:
  • the base material 1000 is cut several times, and each cut forms a part of tangent lines on the base material 1000 that separates one tab 20 from the trim portion 200 .
  • Each cutting forms a group of slitting lines that separate a tab 20 from the trim portion 200, so that each tab 20 can be separated from the trim portion 200, so that each tab 20 is shaken by the trim portion 200
  • the impact is small, and the risk of deformation of the base material 1000 at the tab 20 caused by the vibration of the edge material 200 and the risk of the tab 20 being pulled and damaged by the edge material 200 is reduced, thereby improving the pass rate of the pole piece 100 and the quality of the pole piece 100 .
  • cutting the tab 20 of the substrate 1000 may include:
  • the base material 1000 is cut once, and a multi-component tangent line is formed on the base material 1000 to separate a plurality of tabs 20 from the edge part 200 through one cut, wherein one component tangent line makes one tab 20 and the edge part 200 separate from each other.
  • the material section 200 is separated. That is, multiple tabs 20 are formed by one cutting, so that the cutting efficiency of the tabs 20 is greatly improved, thereby improving the forming efficiency of the pole piece 100 .
  • cutting the substrate 1000 multiple times includes:
  • the substrate 1000 is cut multiple times, and each cut forms a component of tangent lines on the substrate 1000 that separates a tab 20 from the trim portion 200 .
  • the substrate 1000 is cut multiple times, that is, moving the substrate 1000 and cutting the tab 20 are carried out simultaneously, which can improve the cutting efficiency of the tab 20 .
  • the transfer direction of the substrate 1000 is consistent with the width direction of the tab 20 , that is, the first direction A is consistent with the width direction of the tab 20 . In some embodiments, the transport direction of the substrate 1000 is consistent with the length direction of the substrate 1000 . At least one side in the width direction of the substrate 1000 is cut to form tabs 20 .
  • cutting the substrate 1000 multiple times during the process of transferring the substrate 1000 along the first direction A may include:
  • the cutting device 3100 reciprocates along the second direction B to cut the substrate 1000 multiple times; wherein, the first direction A intersects the second direction B.
  • the intersection of the first direction A of transferring the substrate 1000 and the second direction B of cutting the tab 20 can form the tab 20 with a specific profile and form the tab 20 in a specific direction of the substrate 1000 to meet different production and use requirements .
  • the cutting device 3100 reciprocates along the second direction B to cut the tabs 20 , which not only makes the profile of each tab 20 uniform, but also improves the cutting efficiency of the tabs 20 .
  • the substrate 1000 is cut multiple times, that is, moving the substrate 1000 and cutting the tab 20 are carried out simultaneously, which can improve the cutting efficiency of the tab 20 .
  • the first direction A is perpendicular to the second direction B, and the inclined first side 23 and the second side 24 are finally formed.
  • the first direction A and the second direction B are arranged at an acute angle or an obtuse angle.
  • each component cut line includes a first cut line and a second cut line.
  • Each cutting forms a set of tangent lines on the base material 1000 that separates a tab 20 from the trim portion 200, including:
  • Step S1111 cutting the substrate 1000 from the position of the first root 211 of the tab 20 along the first side 23 of the tab 20 to the first position O1 beyond the edge of the width direction of the substrate 1000 to form a first slitting line;
  • Step S1112 cutting the substrate 1000 from the second position O2 extending beyond the edge of the width direction of the substrate 1000 along the second side 24 of the tab 20 to the position of the second root 212 of the tab 20 to form a second segment tangent.
  • step S1111 and step S1112 are not limited, that is, step S1111 may be executed first, and then step S1112 may be executed, wherein the first cutting line extends from the first root portion 211 to the edge beyond the width direction of the substrate 1000 , that is, the first side 23 of the tab 20 is formed by cutting from the first root 211 of the tab 20 to the edge of the substrate 1000 in the width direction.
  • the cutting device 3100 moves relative to the substrate 1000 from a first position O1 outside the edge of the substrate 1000 in the width direction to a second position outside the edge of the substrate 1000 in the width direction. Position O2.
  • the second cutting line extends from the second position O2 to the second root 212 of the tab 20, that is, the second side 24 of the tab 20 is formed by cutting from the second position O2 until the second root 212 of the tab 20 .
  • This cutting method only requires the cutting device 3100 to reciprocate once along the second direction B to form a component tangent line that separates a tab 20 from the trim part 200, and the trim part 200 formed includes A discontinuous side material section, two adjacent discontinuous side material sections are respectively located on the side where the first side 23 of the tab 20 is located and the side where the second side 24 is located, so as to adapt to different pole pieces 100 Molding.
  • step S1112 may also be performed first, and then step S1111 is performed.
  • one end of the first slitting line and one end of the second slitting line can extend to the active material layer of the substrate 1000, so that the part of the tab 20 is coated with the active material layer to enhance the stability of the tab 20. Structural strength.
  • one end of the first slitting line and one end of the second slitting line may also extend to one side of the width direction of the active material layer, and all tabs 20 formed are uncoated active material layers.
  • the current collector of the material layer may also extend to one side of the width direction of the active material layer, and all tabs 20 formed are uncoated active material layers.
  • the cutting device 3100 moves relative to the base material 1000 from the first position O1 outside the edge of the width direction of the base material 1000 to the second position O2 outside the edge of the width direction of the base material 1000 may be that the position of the cutting device 3100 is fixed, Only the substrate 1000 is transferred along the first direction A, or the cutting device 3100 moves in a direction opposite to the transfer direction of the substrate 1000 during the transfer of the substrate 1000 along the first direction A, thereby increasing the cutting
  • the moving speed of the device 3100 relative to the substrate 1000 improves production efficiency.
  • step S111 forming a set of tangent lines on the base material 1000 by cutting each time to separate a tab 20 from the trim portion 200 may include:
  • the second cutting line is formed by cutting the substrate 1000 from the second root 212 of the tab 20 along the second side 24 of the tab 20 to a second position O2 beyond the widthwise edge of the substrate 1000 .
  • the base material 1000 may be cut first by extending from the position of the first root 211 of the tab 20 along the first side 23 of the tab 20 to the first position O1 beyond the edge of the width direction of the base material 1000 , to form the first cutting line, and then cut the substrate through the second position O2 extending from the second root portion 212 of the tab 20 along the second side 24 of the tab 20 to the second position O2 beyond the edge of the width direction of the substrate 1000 1000 to form a second slitting line, wherein the first slitting line extends from the first root portion 211 to a position beyond the edge of the width direction of the substrate 1000, that is, the first side 23 of the tab 20 is formed from the tab
  • the first root portion 211 of 20 starts cutting until the edge of the substrate 1000 in the width direction.
  • the cutting device 3100 stops working and moves in the opposite direction, and at the same time, the substrate 1000 is moved along the first direction A for a certain distance, and the cutting device 3100 moves from the first root 211 to the second side relative to the substrate 1000.
  • the second cutting line extends from the second position O2 to the second root 212 of the tab 20, that is, the second side 24 of the tab 20 is formed by cutting from the second root 212 until the edge of the width direction of the substrate 1000 .
  • This cutting method requires the cutting device 3100 to reciprocate twice along the second direction B to form a component tangent line separating a tab 20 from the trim part 200, and the trim part 200 formed includes A discontinuous side material section, two adjacent discontinuous side material sections are respectively located on the side where the first side 23 of the tab 20 is located and the side where the second side 24 is located, so as to adapt to different pole pieces 100 Molding.
  • the movement of the cutting device 3100 relative to the base material 1000 from the first root 211 to the second root 212 may be achieved by the position of the cutting device 3100 being fixed and only the base material 1000 being moved along the first direction A, or by moving the base material 1000 along the first direction A.
  • the cutting device 3100 moves in a direction opposite to the transfer direction of the substrate 1000, thereby increasing the moving speed of the cutting device 3100 relative to the substrate 1000 and improving production efficiency.
  • the position O1 cuts the substrate 1000 to form a first slitting line.
  • forming a set of tangent lines on the base material 1000 by cutting each time to separate a tab 20 from the trim portion 200 includes:
  • the second cutting line is formed by cutting the substrate 1000 from the second position O2 extending beyond the widthwise edge of the substrate 1000 along the second side 24 of the tab 20 to the second root 212 of the tab 20 .
  • the substrate 1000 may be first cut by extending from the first position O1 beyond the edge of the width direction of the substrate 1000 along the first side 23 of the tab 20 to the position of the first root 211 of the tab 20, To form the first cutting line; again by extending from the second position O2 beyond the edge of the width direction of the substrate 1000 along the second side 24 of the tab 20 to the position of the second root 212 of the tab 20 to cut the substrate 1000, To form the second slitting line, wherein, the first slitting line extends from the first position O1 beyond the edge of the width direction of the substrate 1000 to the first root 211, that is, the first side 23 of the tab 20 is formed from the base Cutting begins at the first position O1 outside the edge of the width direction of the material 1000 until the first root 211 .
  • the cutting device 3100 stops cutting and moves in the opposite direction along the second direction B, while the base material 1000 moves a certain distance along the first direction A.
  • the first position O1 outside the edge in the width direction moves to the second position O2 outside the edge in the width direction of the substrate 1000 .
  • the second cutting line extends from the second position O2 to the second root 212 of the tab 20, that is, the second side 24 of the tab 20 is formed by cutting from the second position O2 until the second root 212 of the tab 20 .
  • This cutting method requires the cutting device 3100 to reciprocate twice along the second direction B to form a component tangent line separating a tab 20 from the trim part 200, and the trim part 200 formed includes A discontinuous side material section, two adjacent discontinuous side material sections are respectively located on the side where the first side 23 of the tab 20 is located and the side where the second side 24 is located, so as to adapt to different pole pieces 100 Molding.
  • the cutting device 3100 moves relative to the base material 1000 from the first position O1 outside the edge of the width direction of the base material 1000 to the second position O2 outside the edge of the width direction of the base material 1000 may be fixed by the cutting device 3100 , only the substrate 1000 is transferred along the first direction A, or it may be realized by moving the cutting device 3100 in a direction opposite to the transfer direction of the substrate 1000 during the transfer of the substrate 1000 along the first direction A, so that The moving speed of the cutting device 3100 relative to the substrate 1000 is increased to improve production efficiency.
  • the substrate 1000 can be first cut by extending from the second position O2 beyond the edge of the substrate 1000 in the width direction along the second side 24 of the tab 20 to the position of the second root 212 of the tab 20 , to form a second cutting line, and then cut the substrate 1000 by extending from the first position O1 beyond the edge of the width direction of the substrate 1000 along the first side 23 of the tab 20 to the position of the first root 211 of the tab 20 , to form the first tangent line.
  • each component tangent line includes a third sectional line, a fourth tangent line and a fifth sectional line, and the third sectional line and the fifth tangent line are respectively connected to Both ends of the fourth tangent.
  • Each cutting forms a set of tangent lines on the base material 1000 that separates a tab 20 from the trim portion 200, including:
  • Step S1117 by cutting the substrate 1000 from the first root 211 of the tab 20 along the first side 23 of the tab 20 to the top side 22 of the tab 20 to form a third cutting line;
  • Step S1119 cutting the substrate 1000 from the top edge 22 of the tab 20 along the second side 24 of the tab 20 to the second root 212 of the tab 20 to form a fifth cutting line;
  • the third cutting line, the fourth cutting line and the fifth cutting line jointly separate one tab 20 from the trim part 200 .
  • Step S1117, step S1118 and step S1119 are executed successively, the third cutting line separating the tab 20 and the trim part 200 extends from the first root 211 of the tab 20 along the first side 23 of the tab 20 to the tab The top edge 22 of the tab 20 is cut and formed, and the fourth cutting line separating the tab 20 and the trim part 200 is formed by cutting the base material 1000 along the top edge 22 of the tab 20 to separate the tab 20 and the trim.
  • the fifth parting line of the part 200 is formed by cutting from the top edge 22 of the tab 20 along the second side 24 of the tab 20 to the second root part 212 of the tab 20, then the third parting line and the fourth parting line
  • the edge material part 200 formed with the fifth cutting line is a continuous edge material part 200 to adapt to different forming processes of the pole piece 100 .
  • step S1119 may be performed first, then step S1118 is performed, and finally step S1117 is performed.
  • step S200 includes:
  • the base material 1000 is cut along the line between the adjacent first root portion 211 and the second root portion 212 to separate the trim portion 200 from the main body portion 10 .
  • cutting the base material 1000 along the line between the adjacent first root portion 211 and the second root portion 212 may be to keep the relative position of the cutting device 3100 fixed, and move the base material 1000 along the first direction A, so as to Make the cutting device 3100 move relative to the substrate 1000 from the first root 211 to the second root 212; it is also possible that the cutting device 3100 and the substrate 1000 both move, and the moving direction of the cutting device 3100 is opposite to the transfer direction of the substrate 1000 , so as to increase the relative moving speed of the cutting device 3100 and the substrate 1000 , thereby improving the forming efficiency of the pole piece 100 .
  • the trim part 200 and the main part 10 are separated along the line connecting the adjacent first root part 211 and the second root part 212 , so that the contour of the main part 10 formed by cutting is regular, and the molding quality of the pole piece 100 is improved.
  • the forming method of the pole piece 100 further includes:
  • Step S300 when cutting the tab 20 on the substrate 1000, perform the first negative pressure dust removal treatment
  • Step S400 when cutting the edge material 200 of the base material 1000, perform a second negative pressure dust removal treatment, the negative pressure of the first negative pressure dust removal treatment is less than or equal to that of the second negative pressure dust removal treatment Negative pressure.
  • negative pressure dust removal treatment is performed, which can ensure the cleanliness of the forming environment of the pole piece 100 and reduce the process of cutting the base material 1000 The impact of the generated dust on the pole piece 100.
  • the amount of dust generated when cutting the tab 20 of the base material 1000 is less than the amount of dust generated when cutting the edge part 200 of the base material 1000. Therefore, in some embodiments, the first negative pressure The negative pressure of the dust removal process is less than or equal to the negative pressure of the second negative pressure dust removal process, so that the dust removal capacity of the dust removal device 3300 can match the amount of dust generated, so as to fully remove dust as much as possible, not only to meet the dust removal requirements, but also Can play the role of energy saving and cost saving.
  • the embodiment of the present application also provides a pole piece forming equipment 3000.
  • the pole piece forming equipment 3000 includes a cutting device 3100, and the cutting device 3100 is configured to cut the tab 20 on the base material 1000, so as to
  • the base material 1000 is formed into a main body 10, an edge part 200 connected to the main body 10, and a plurality of tabs 20 connected to the main body 10 and separated from the edge part 200; and configured In order to cut the edge part 200 of the base material 1000 , the edge part 200 is separated from the main body part 10 .
  • the cutting device 3100 can cut the base material 1000 in two steps.
  • the first step is to cut the tab 20 of the base material 1000 so that the tab 20 is separated from the trim part 200.
  • the vibration of the material part 200 has little effect on the tab 20, which greatly reduces the risk of the deformation of the base material 1000 at the tab 20 due to the vibration of the edge material part 200 and the damage of the tab 20 being pulled by the edge material part 200, resulting in a decrease in the product qualification rate.
  • the cutting device 3100 cuts the trim portion 200 on the substrate 1000 to separate the trim portion 200 from the main body 10 , and completes the cutting of the pole piece 100 .
  • the cutting device 3100 includes a first cutting device 3110 and a second cutting device 3120 .
  • the first cutting device 3110 is configured to cut the tab 20 on the base material 1000, so that the base material 1000 forms the main body 10, the trim part 200 connected to the main body 10, and the trim part 200 connected to the main body 10 and connected to the trim part. 200 separated multiple tabs 20 ;
  • the second cutting device 3120 is configured to cut the trim portion 200 of the substrate 1000 to separate the trim portion 200 from the main body 10 .
  • Cutting the tab 20 of the base material 1000 and cutting the trim portion 200 of the base material 1000 use different cutting devices 3100 respectively, so that the steps of cutting the tab 20 and cutting the trim portion 200 do not affect each other. It is beneficial to form a high-quality pole piece 100 .
  • the first cutting device 3110 and the second cutting device 3120 can be controlled independently, so that the operation of the pole piece forming equipment 3000 is more flexible.
  • the first cutting device 3110 and the second cutting device 3120 can work simultaneously, that is, in the process of cutting the tab 20 of the base material 1000 by the first cutting device 3110, the second cutting device 3120 can combine the tab 20 with the electrode
  • the edge material part 200 separated from the ear 20 is separated from the main part 10 , thereby improving the production efficiency of the pole piece 100 .
  • the pole piece forming apparatus 3000 further includes a transfer device 3200 , and the transfer device 3200 is configured to transfer the substrate 1000 along the first direction A.
  • the transfer device 3200 transfers the base material 1000 so that the cutting device 3100 can form the tabs 20 at different positions of the base material 1000 , so as to facilitate the formation of the pole pieces 100 with multiple tabs 20 .
  • the cutting device 3100 can also cut the tabs 20 of the substrate 1000 and cut the edge part 200 of the substrate 1000 during the process of moving the substrate 1000 by the transfer device 3200, which can improve the cutting efficiency and further improve Pole piece 100 production efficiency.
  • the transfer device 3200 includes a release roller (not shown in the figure), a winding roller (not shown in the figure) and a delivery roller 3210, the substrate 1000 is wound on the peripheral surface of the release roller, and the winding roller is It is configured to wind the substrate 1000 from one end of the substrate 1000 so that the substrate 1000 is wound on the winding roller, the release roller and the winding roller rotate at the same time, and the rotation of the release roller makes the substrate 1000 wound on the release roller gradually disengage The release roller and the winding roller rotate so that the substrate 1000 detached from the release roller is gradually wound on the winding roller.
  • Drive rollers are used to transport the substrate 1000 from the release rollers to the take-up rollers.
  • the second cutting device 3120 is disposed downstream of the first cutting device 3110; the first cutting device 3110 is configured to The tab 20 is cut from the material 1000; the second cutting device 3120 is configured to cut the trim 200 of the base material 1000 when the transfer device 3200 is moving the base material 1000 along the first direction A.
  • downstream and upstream refer to the order in which the forming process of the pole piece 100 is performed, not the spatial position of the first cutting device 3110 and the second cutting device 3120. limited.
  • the second cutting device 3120 is located downstream of the first cutting device 3110 , which means that the process performed by the second cutting device 3120 is after the process performed by the first cutting device 3110 .
  • the first cutting device 3110 is located upstream of the second cutting device 3120, in other words, the process performed by the first cutting device 3110 is before the process performed by the second cutting device 3120 .
  • the part of the substrate 1000 that has been cut by the tabs 20 can be moved to the second cutting device 3120 under the action of the transfer device 3200, and the second cutting device 3120 cuts the trim part 200, so that the base
  • the cutting of the tab 20 of the material 1000 and the cutting of the trim part 200 of the base material 1000 can be carried out continuously, the first cutting device 3110 can continuously cut the tab 20 of the base material 1000, and the second cutting device 3120 can Continuously cutting the edge material 200 of the base material 1000 can improve the cutting efficiency, thereby improving the production efficiency of the pole piece 100 .
  • At least one of the first cutting device 3110 and the second cutting device 3120 is a laser cutting device 3100 .
  • the laser cutting device 3100 has the advantages of good cutting quality, high cutting precision, fast cutting speed, and low post-maintenance cost.
  • At least one of the first cutting device 3110 and the second cutting device 3120 is a laser cutting device 3100, which means that the first cutting device 3110 or the second cutting device 3120 is a laser cutting device 3100, or The first cutting device 3110 and the second cutting device 3120 are both laser cutting devices 3100 .
  • the first cutting device 3110 and the second cutting device 3120 can also be in other forms, for example, the first cutting device 3110 and the second cutting device 3120 are punching devices, and the tab 20 is cut and edged by punching. The material part 200 is cut.
  • the pole piece forming equipment 3000 further includes a dust removal device 3300, and the dust removal device 3300 is configured to clean the base material 1000 when the cutting device 3100 cuts the base material 1000. Dust produced.
  • the dust removal device 3300 is configured to clean the base material 1000 when the cutting device 3100 cuts the base material 1000. Dust produced.
  • the dust generated during cutting is removed by the dust removal device 3300, which can ensure the cleanliness of the forming environment of the pole piece 100 and reduce the impact of the dust generated during the cutting of the base material 1000 on the pole piece 100. influences.
  • the dust removal device 3300 includes a first dust removal device 3310 and a second dust removal device 3320 .
  • the first dust removal device 3310 is configured to remove dust generated on the substrate 1000 when the first cutting device 3110 cuts the tab 20 on the substrate 1000 .
  • the second dust removal device 3320 is configured to remove the dust generated on the substrate 1000 when the second cutting device 3120 cuts the trim portion 200 of the substrate 1000 .
  • the first cutting device 3110 and the second cutting device 3120 are respectively provided with a first dedusting device 3310 and a second dedusting device 3320 correspondingly. 200 is subjected to dust removal treatment during cutting, and the dust removal effect is better, which can ensure the cleanliness of the forming environment of the pole piece 100 and reduce the influence of dust generated during the cutting process of the base material 1000 on the pole piece 100 .
  • the pole piece forming equipment 3000 may also only include one dust removal device 3300, that is, the same dust removal device 3300 is used when cutting the tab 20 of the base material 1000 and cutting the trim part 200 of the base material 1000.
  • the device 3300 performs dust removal.
  • the first dust removal device 3310 includes a first negative pressure generating device
  • the second dust removal device 3320 includes a second negative pressure generating device
  • the negative pressure of the second negative pressure generating device is greater than or equal to the first negative pressure generating device. Negative pressure when the pressure generating device is working.
  • Dust removal through negative pressure makes it easier for dust to gather at a certain location (such as the dust collection location), reducing the possibility of dust spreading in the cutting environment, making the dust concentration of the gas after negative pressure dust removal low, which can effectively prevent or Reduce wear and tear on the device. And the negative pressure delivery is simple and easy to realize.
  • the negative pressure of the second negative pressure generating device is greater than or It is equal to the negative pressure when the first negative pressure generating device is working, which not only meets the requirement of dust removal, but also plays the role of energy saving and cost saving.
  • the first negative pressure generating mechanism 3311 includes an adsorption support part 33111, a first negative pressure pump (not shown in the figure) , a second negative pressure pump (not shown in the figure) and a dust discharge pipe 33112; the inside of the adsorption support part 33111 forms a first adsorption chamber (not shown in the figure) and a second adsorption chamber (not shown in the figure),
  • the dust exhaust pipe 33112 communicates with the second adsorption chamber.
  • the adsorption support part 33111 has an adsorption surface 33113, and the adsorption surface 33113 is provided with a plurality of adsorption holes 33114 communicating with the first adsorption chamber.
  • the first negative pressure pump is used to form a negative pressure in the first adsorption chamber to make the substrate 1000 It can be attached to the adsorption surface 33113 under the action of negative pressure; the adsorption surface 33113 is also provided with a dust suction hole 33115 communicating with the second suction chamber, and the first cutting device 3110 is connected to the substrate 1000 and the first dust suction hole 33115
  • the tab 20 is cut on the substrate 1000 at the corresponding position, and the second negative pressure pump is used to form a negative pressure in the second adsorption chamber so that the first cutting device 3110 produces Dust can enter the second adsorption chamber from the dust suction hole 33115 and be discharged from the dust discharge pipe 33112 .
  • the adsorption support part 33111 also has a cutting surface 33116 arranged opposite to the adsorption surface 33113, and a cutting hole 33117 is arranged on the cutting surface 33116, and the cutting hole 33117 is aligned with the suction hole 33115 and is aligned with the second suction chamber connected.
  • the laser output from the first cutting device 3110 passes through the cutting hole 33117 , the second suction cavity and the dust suction hole 33115 to reach the substrate 1000 in sequence, and then cuts the tab 20 on the substrate 1000 .
  • the first negative pressure generating device includes two first negative pressure generating mechanisms 3311 .
  • the adsorption surfaces 33113 of the two first negative pressure generating mechanisms 3311 are arranged at intervals relative to each other.
  • the substrate 1000 is located between the adsorption surfaces 33113 of the two first negative pressure generating mechanisms 3311, the arrangement direction of the adsorption surfaces 33113 of the two first negative pressure generating mechanisms 3311 is the same as the part of the substrate 1000 located between the two adsorption surfaces 33113
  • the transfer direction of the substrate 1000 is vertical, and the axis of the dust discharge duct 33112 of the first negative pressure generating mechanism 3311 is parallel to the transfer direction of the part of the substrate 1000 located between the two adsorption surfaces 33113 .
  • the first negative pressure generating device includes a first negative pressure generating mechanism 3311 .
  • the pole piece forming apparatus 3000 further includes a waste guide device 3330 configured to guide the trim part 200 to the waste collection place 3400 after the trim part 200 is separated from the main body part 10 .
  • the waste material guiding device 3330 can lead the edge material part 200 to the waste material collection place 3400 in time after the edge material part 200 is separated from the main body part 10, so as to improve the working efficiency.
  • the waste guiding device 3330 is disposed downstream of the second cutting device 3120 .
  • the waste guide device 3330 includes a mounting frame 3331 , an adsorption belt 3332 , a driving wheel 3333 , a driven wheel 3334 , a driving member 3335 and a third negative pressure pump (not shown in the figure).
  • the driving member 3335 is installed on the mounting frame 3331, the driving wheel 3333 is installed on the output shaft of the driving member 3335, the driven wheel 3334 is rotatably connected to the mounting frame 3331 and arranged at intervals with the driving wheel 3333, the rotation axis of the driven wheel 3334 and the rotation of the driving wheel 3333 The axes are parallel, the adsorption belt 3332 is wound around the driving wheel 3333 and the driven wheel 3334, and the third negative pressure pump is used to form a negative pressure inside the adsorption belt 3332, so that the edge material 200 can pass through the adsorption belt 3332 under negative pressure. Under the action of pressure, it is adsorbed on the surface of the adsorption belt 3332 and guided to the waste collection place 3400 following the driving direction of the adsorption belt 3332.

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Abstract

一种极片成型方法，包括：对基材（1000）进行极耳（20）裁切，以使基材（1000）形成主体部（10）、与主体部（10）相连的边料部（200）、以及与主体部（10）相连且与边料部（200）分离的多个极耳（20）；对基材（1000）进行边料部（200）裁切，以将边料部（200）与主体部（10）分离。极片成型方法先将极耳与边料部分离，减小了裁切过程中边料部抖动对极耳的影响，减少了极耳的变形和破损，提高了极片成型质量。还提供了一种极片成型设备。

Description

极片成型方法及设备
相关申请的交叉引用
本申请本申请要求享有于2021年06月30日提交的名称为“极片成型方法及设备”的中国专利申请202110742032.9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
本申请涉及电池制造技术领域，具体而言，涉及一种极片成型方法及设备。
背景技术
锂电池在电子产品、车辆、航空航天等领域有广泛应用。随着应用环境及条件越来越复杂，对电池的使用安全性能、能量密度以及生产成本等提出了更高的要求。
其中，锂离子电池的极片成型质量的好坏对电池的安全性能、能量密封以及生产成本等都有较大的影响，因此，如何提高极片的成型质量成为电池制造过程中亟待解决的问题。
发明内容
本申请实施例提供一种极片成型方法及设备，以提高极片成型质量。
第一方面，本申请实施例提供一种极片成型方法，所述极片包括主体部和极耳，所述极耳从所述主体部的边缘凸出于所述主体部，所述极片成型方法包括：
对基材进行极耳裁切，以使所述基材形成所述主体部、与所述主体部相连的边料部和与所述主体部相连且与所述边料部分离的多个所述极耳；
对所述基材进行边料部裁切，以将所述边料部与所述主体部分离。
上述技术方案中，极片成型分两步实现，第一进步将极耳与边料部分离，这样裁切作业过程中，边料部抖动对极耳影响极小，大大降低了因边料部抖动造成极耳变形以及极耳被边料部拉扯破损，导致产品合格率下降的风险，也能提高极片成型质量；边料部与极耳分离后，再进行边料部裁切以使边料部与主体部分离，完成极片裁切。
在本申请第一方面的一些实施例中，所述对基材进行极耳裁切包括：
对所述基材进行多次裁切，每次裁切在所述基材上形成使一个所述极耳与所述边料部分离的一组分切线。
上述技术方案中，每次裁切形成一组将一个极耳与边料部分离的分切线，使得每个极耳均能与边料部分离，使得每个极耳受到边料部抖动的影响较小，降低因边料部抖动造成极耳处基材变形以及极耳被边料部拉扯破损的风险，从而提高极片的合格率和极片质量。
在本申请第一方面的一些实施例中，所述对所述基材进行多次裁切包括：
在沿第一方向移送所述基材的过程中对所述基材进行多次裁切，每次裁切在所述基材上形成使一个所述极耳与所述边料部分离的一组分切线。
上述技术方案中，在沿第一方向移送基材的过程中对基材进行多次裁切，即移动基材和裁切极耳同时进行，能够提高极耳裁切效率。
在本申请第一方面的一些实施例中，所述在沿第一方向移送所述基材的过程中对所述基材进行多次裁切包括：
在沿所述第一方向移送所述基材的过程中通过裁切装置沿第二方向往复运动对所述基材进行多次裁切；
其中，所述第一方向与所述第二方向相交。
上述技术方案中，基材移送的第一方向和裁切极耳的第二方向相交能够形成具有特定轮廓的极耳和在基材的特定方向上形成极耳，满足不同的生产和使用需求。裁切装置沿第二方向往复运动进行极耳裁切，不仅使得各个极耳轮廓均匀，还能提高极耳裁切效率。在沿第一方向移送基材的过程中对基材进行多次裁切，即移动基材和裁切极耳同时进行，能够提高极耳裁切效率。
在本申请第一方面的一些实施例中，每组分切线包括第一分切线和第二分切线；
所述每次裁切在所述基材上形成使一个所述极耳与所述边料部分离的一组分切线包括：
通过从所述极耳的第一根部位置沿所述极耳的第一侧边延伸至超出所述基材的宽度方向的边缘的第一位置裁切所述基材，以形成所述第一分切线；
通过从超出所述基材的宽度方向的边缘的第二位置沿所述极耳的第二侧边延伸至所述极耳的第二根部位置裁切所述基材，以形成所述第二分切线。
上述技术方案中，分离极耳和边料部的第一分切线是从极耳的第一根部位置沿极耳的第一侧边延伸至超出基材的宽度方向的边缘裁切形成的，分离极耳和边料部的第二分切线是从超出基材的宽度方向的边缘的第二位置沿极耳的第二侧边延伸至极耳的第二根部位置裁切形成的，则第一分切线和第二分切线形成位于极耳的第一侧边和第二侧边的两个间断的边料段，以适应不同的极片成型工艺。
在本申请第一方面的一些实施例中，每组分切线包括第三分切线、第四分切线和第五分切线，所述第三分切线和所述第五分切线分别连接于所述第四分切线的两端；
所述每次裁切在所述基材上形成使一个所述极耳与所述边料部分离的一组分切线包括：
通过从所述极耳的第一根部沿着所述极耳的第一侧边延伸至所述极耳的顶边裁切所述基材，以形成所述第三分切线；
通过沿所述极耳的顶边对所述基材进行裁切，以形成所述第四分切线；
通过从所述极耳的顶边沿所述极耳的第二侧边延伸至所述极耳的第二根部裁切所述基材，以形成所述第五分切线；
所述第三分切线、所述第四分切线与所述第五分切线共同将一个所述极耳与所述边料部分离。
上述技术方案中，分离极耳和边料部的第三分切线是从极耳的第一根部沿着极耳的第一侧边延伸至极耳的顶边裁切形成的，分离极耳和边料部的第四分切线是沿极耳的顶边对基材进行裁切形成的，分离极耳和边料部的第五分切线是从极耳的顶边沿极耳的第二侧边延伸至极耳的第二根部裁切形成的，则第三分切线、第四分切线和第五分切线形成的边料部为连续的边料部，以适应不同的极片成型工艺。
在本申请第一方面的一些实施例中，每两个相邻的所述极耳具有相邻的第一根部和第二根部；
所述对所述基材进行边料部裁切，以将所述边料部与所述主体部分离包括：
通过沿相邻的所述第一根部和所述第二根部之间的连线裁切所述基材，以将所述边料部与所述主体部分离。
上述技术方案中，沿相邻的第一根部和第二根部的连线将边料部和主体部分离，以使裁切形成的主体部轮廓规则，提高极片成型质量。
在本申请第一方面的一些实施例中，所述极片成型方法还包括：
在对基材进行极耳裁切时，进行第一次负压除尘处理；在对基材进行边料部裁切时，进行第二次负压除尘处理；所述第一次负压除尘处理的负压压力小于或等于所述第二次负压除尘处理的负压压力。
上述技术方案中，在对基材进行极耳裁切时和对基材进行边料部裁切时均进行负压除尘处理，能够保证极片成型环境的清洁和减少裁切基材过程中产生的粉尘对极片的影响。对基材进行极耳裁切时产生的粉尘量小于对基材进行边料部裁切时产生的粉尘量，因此，第一次负压除尘的负压压力小于第二次负压除尘的负压压力，不仅能满足除尘需求，还能起到节能、节约成本的作用。
第二方面，本申请实施例提供一种极片成型设备，包括：
裁切装置，被配置为对基材进行极耳裁切，以使所述基材形成主体部、与所述主体部相连的边料部和与所述主体部相连且与所述边料部分离的多个极耳；以及被配置为对所述基材进行边料部裁切，以将所述边料部与所述主体部分离。
上述技术方案中，裁切装置能够分两步对基材进行裁切，第一进步对基材进行极耳裁切，以使极耳与边料部分离，这样裁切作业过程中，边料部抖动对极耳影响极小，大大降低了因边料部抖动造成极耳处基材变形以及极耳被边料部拉扯破损，导致产品合格率下降的风险，边料部与极耳分离后，裁切装置再对基材进行边料部裁切以使边料部与主体部分离，完成极片裁切。
在本申请第二方面的一些实施例中，所述裁切装置包括第一裁切装置和第二裁切装置；
所述第一裁切装置被配置对所述基材进行极耳裁切，以使所述基材形成所述主体部、与所述主体部相连的所述边料部和与所述主体部相连且与所述边料部分离的多个所述极耳；
所述第二裁切装置被配置为对所述基材进行边料部裁切，以将所述边料部与所述主体部分离。
上述技术方案中，对基材进行极耳裁切和对基材进行边料部裁切分别采用不同的裁切装置，使得裁切极耳和裁切边料部的步骤互不影响，有利于形成高质量的极片。且第一裁切装置和第二裁切装置能够被独立控制，使得极片成型设备操作更加灵活。第一裁切装置和第二裁切装置能够同时工作，即在第一裁切装置对基材进行极耳裁切的过程中，第二裁切装置能够将已经与极耳分离的边料部与主体部分离，从而提高，从而提高极片生产效率。
在本申请第二方面的一些实施例中，所述极片成型设备还包括移送装置，所述移送装置被配置为沿第一方向移送所述基材。
上述技术方案中，移送装置移送基材以使裁切装置能够在基材的不同位置形成极耳，便于形成多极耳极片。此外，裁切装置还能在移送装置移动基材的过程中对基材进行极耳裁切和对基材进行边料部裁切，能够提高裁切效率，进而提高极片生产效率。
在本申请第二方面的一些实施例中，所述第二裁切装置设于所述第一裁切装置的下游；
所述第一裁切装置被配置为在所述移送装置沿所述第一方向移送所述基材的过程中对所述基材进行极耳裁切；
所述第二裁切装置被配置为在所述移送装置沿所述第一方向移送所述基材的过程中对所述基材进行边料部裁切。
上述技术方案中，第二裁切装置设于第一裁切装置的下游，基材完成了极耳裁切的部分能够在移送装置的作用下被移动至第二裁切装置处，并由第二裁切装置进行边料部裁切，这样对基材进行极耳裁切和对基材进行边料部裁切能够连续进行，第一裁切装置能够持续对基材进行极耳裁切，第二裁切装置能够持续对基材进行边料部裁切，能够提高裁切效率，进而提高极片生产效率。
在本申请第二方面的一些实施例中，所述第一裁切装置和所述第二裁切装置中至少一者为激光裁切装置。
上述技术方案中，第一裁切装置和第二裁切装置中至少一者为激光裁切装置，激光裁切装置具有裁切质量好、裁切精度高、裁切速度快、后期维护成本低等优点。
在本申请第二方面的一些实施例中，所述极片成型设备还包括除尘装置，所述除尘装置被配置为清除所述裁切装置裁切所述基材时在所述基材上产生的粉尘。
上述技术方案中，在裁切装置裁切基材时，通过除尘装置清除裁切时产生的粉尘，能够保证极片成型环境的清洁和减少裁切基材过程中产生的粉尘对极片的影响。
本申请第二方面的一些实施例中，所述除尘装置包括第一除尘装置和第二除尘装置；
所述第一除尘装置被配置为清除所述第一裁切装置对所述基材进行极耳裁切时在所述基材上产生的粉尘；
所述第二除尘装置被配置为清除所述第二裁切装置对所述基材进行边料部裁切时在所述基材上产生的粉尘。
上述技术方案中，第一裁切装置和第二裁切装置分别对应设置有第一除尘装置和第二除尘装置，使得除尘效果更好。
在本申请第二方面的一些实施例中，所述第一除尘装置包括第一负压发生装置，所述第二除尘装置包括第二负压发生装置，所述第二负压发生装置工作时的负压压力大于或等于所述第一负压发生装置工作时的负压压力。
上述技术方案中，负压除尘后的气体含尘浓度低，可有效防止或减少装置的磨损。且负压输送简单，易于实现。
在本申请第二方面的一些实施例中，所述极片成型设备还包括导废料装置，所述导废料装置被配置为在所述边料部与所述主体部分离后将所述边料部引导至废料收集处。
上述技术方案中，导废料装置能够在边料部与主体部分离后及时将边料部因导致废料收集处，提高作业效率。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，应当理解，以下附图仅示出了本申请的某些实施例，因此不应被看作是对范围的限定，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，还可以根据这些附图获得其他相关的附图。
图1为极片的结构示意图；
图2为现有技术中一种极片成型的裁切路径示意图；
图3为现有技术中另一种极片成型的裁切路径示意图；
图4为本申请一些实施例提供的极片成型方法的流程图；
图5为本申请另一些实施例提供的极片成型方法流程图；
图6为本申请另一些实施例提供的极片裁切的轨迹示意图；
图7为本申请另一些实施例提供的基材被裁切并形成间断的边料部的示意图；
图8为本申请又一些实施例提供的极片成型方法流程图；
图9为本申请又一些实施例提供的极片裁切的轨迹示意图；
图10为本申请又一些实施例提供的基材被裁切并形成连续的边料部的示意图；
图11为本申请再一些实施例提供的具有除尘步骤的极片成型方法的流程图；
图12为本申请一些实施例提供的极片成型设备的结构示意图；
图13为本申请一些实施例提供的第一负压发生机构第一视角的结构示意图；
图14为本申请一些实施例提供的第一负压发生机构第二视角的结构示意图；
图15为本申请一些实施例提供的包括两个第一负压发生机构的除尘装置的结构示意图；
图16为本申请一些实施例提供的导废料装置的结构示意图。
图标：100-极片；10-主体部；20-极耳；21-根边；211-第一根部；212-第二根部；22-顶边；23-第一侧边；24-第二侧边；1000-基材；200-边料部；210-底边；3000-极片成型设备；3100-裁切装置；3110-第一裁切装置；3120-第二裁切装置；3200-移送装置；3210-传送辊；3300-除尘装置；3310-第一除尘装置；3311-第一负压发生机构；33111-吸附支撑部；33112-排尘管道；33113-吸附面；33114-吸附孔；33115-吸尘孔；33116-裁切面；33117-裁切孔；3320-第二除尘装置；3330-导废料装置；3331-安装架；3332-吸附带；3333-主动轮；3334-从动轮；3335-驱动件；3400-废料收集处；A-第一方向；B-第二方向；O1-第一位置；O2-第二位置。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。通常在此处附图中描述和示出的本申请实施例的组件可以以各种不同的配置来布置和设计。
因此，以下对在附图中提供的本申请的实施例的详细描述并非旨在限制要求保护的本申请的范围，而是仅仅表示本申请的选定实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步定义和解释。
在本申请实施例的描述中，需要说明的是，指示方位或位置关系为基于附图所示的方位或位置关系，或者是该申请产品使用时惯常摆放的方位或位置关系，或者是本领域技术人员惯常理解的方位或位置关系，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”等仅用于区分描述，而不能理解为指示或暗示相对重要性。
本申请中出现的“多个”指的是两个以上(包括两个)。
本申请中，电池单体可以包括锂离子二次电池、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，本申请实施例对此并不限定。电池单体可呈圆柱体、扁平体、长方体或其它形状等，本申请实施例对此也不限定。电池单体一般按封装的方式分成三种：柱形电池单体、方体方形电池单体和软包电池单体，本申请实施例对此也不限定。
电池单体包括电极组件和电解液，电极组件由正极片、负极片和隔离膜组成。电池单体主要依靠金属离子在正极片和负极片之间移动来工作。正极片包括正极集流体和正极活性物质层，正极活性物质层涂覆于正极集流 体的表面，未涂敷正极活性物质层的正极集流体凸出于已涂覆正极活性物质层的正极集流体，未涂敷正极活性物质层的正极集流体作为正极极耳的至少部分。在一些实施例中，正极片的正极极耳为未涂覆正极活性物质层的正极集流体，在另一些实施例中，为了保证正极极耳的结构强度，正极极耳包括未涂覆正极活性物质层的正极集流体和部分涂覆了正极活性物质层的正极集流体。以锂离子电池为例，正极集流体的材料可以为铝，正极活性物质可以为钴酸锂、磷酸铁锂、三元锂或锰酸锂等。负极片包括负极集流体和负极活性物质层，负极活性物质层涂覆于负极集流体的表面，未涂敷负极活性物质层的负极集流体凸出于已涂覆负极活性物质层的负极集流体，未涂敷负极活性物质层的负极集流体作为负极极耳的至少部分。在一些实施例中，负极片的负极极耳为未涂覆负极活性物质层的负极集流体，在另一些实施例中，为了保证负极极耳的结构强度，负极极耳包括未涂覆负极活性物质层的负极集流体和部分涂覆了负极活性物质层的正极集流体。负极集流体的材料可以为铜，负极活性物质可以为碳或硅等。为了保证通过大电流而不发生熔断，正极极耳的数量为多个且层叠在一起，负极极耳的数量为多个且层叠在一起。隔离膜的材质可以为PP(polypropylene，聚丙烯)或PE(polyethylene，聚乙烯)等。此外，电极组件可以是卷绕式结构，也可以是叠片式结构，本申请实施例并不限于此。
现有技术中形成正极片如下：
在正极集流体上涂覆一定宽度的正极活性物质层，再对未涂覆正极活性物质层的正极集流体进行裁切，以形成沿正极集流体的长度方向间隔布置的多个正极极耳，根据裁切的深度不同，形成的正极极耳可以包括正极活性物质层，也可以不包括正极活性物质层。
现有技术中形成负极片如下：
在负极集流体上涂覆一定宽度的负极活性物质层，再对未涂覆负极活性物质层的负极集流体进行裁切，以形成沿负极集流体的长度方向间隔布置的多个负极极耳，根据裁切的深度不同，形成的负极极耳可以包括负极活性物质层，也可以不包括负极活性物质层。
如图1所示，成型后的极片100(正极片100或者负极片100)包括主体部10和极耳20，极耳20从主体部10的边缘凸出于主体部10。每个极耳20具有与主体部10连接的根边21，沿根边21的延伸方向，每个极耳20具有位于根边21的两端的第一根部211和第二根部212。每个极耳20具有与根边21相对布置的顶边22，根边21和顶边22相对的方向为对应极耳20的高度方向。每个极耳20具有相对布置的第一侧边23和第二侧边24，第一侧边23的一端与根边21相交于第一根部211，第一侧边23的另一端与顶边22相交，第二侧边24的一端与根边21相交于第二根部212，第二侧边24的另一端与顶边22相交，第一侧边23和第二侧相对的方向为对应极耳20的宽度方向。
发明人发现，无论是正极片100还是负极片100，在裁切形成极耳20时，均是一步成型，如图2所示，先进行直边切割使得边料部200的底边210和主体部10分离，再由极耳20的第一根部211沿极耳20的第一侧边23往极耳20的顶边22裁切，再沿极耳20的顶边22直线裁切一端距离使极耳20的顶边22与边料部200分离，最后从极耳20的顶边22沿极耳20的第二侧边24裁切至第二根部212，最终使边料部200和极耳20分离，形成一个极耳20。在现有极耳20成型的另一种方法中，如图3所示，先进行直边切割使得边料部200的底边210和主体部10分离，再由极耳20的第一根部211沿极耳20的第一侧边23往极耳20的顶边22裁切，裁切装置3100相对基材1000移动一定距离后，从极耳20的顶边22沿极耳20的第二侧边24裁切至另第二根部212，最终使边料部200和极耳20分离，形成一个极耳20，这种方法不需要裁切极耳20的顶边22。
在图2和图3示出的极片100裁切方式中，在完成进行直边裁切使得边料部200的底边210和主体部10分离的步骤后，边料部200因气流不稳定、机械振动等原因边料部200会产生抖动，由于边料部200至少和极耳20的一个侧边连接在一起，边料部200的抖动会带动极耳20抖动，使得边料部200不断拉扯极耳20，导致极耳20变形甚至破损，从而导致产品合格率下降。此外，在从边料部200的底边210向第一侧边23过渡的过程中，需要换向裁切，即在第一根部211位置裁切需要换向裁切，以及在从第二侧边24向边料部200的地边过渡的过程中，需要换向裁切，即在第二根部212位置裁切需要换向裁切，换向的路径较长，需要耗费较长时间，严重影响极片100生产效率。
基于此，本申请实施例提供一种技术方案，通过先让边料部200和极耳20分离，再让边料部200和主体部10分离，大大降低了因边料部200抖动造成极耳20变形以及极耳20被边料部200拉扯破损，导致产品合格率下降的风险，也能提高极片100成型质量。
本申请实施例描述的技术方案适用于正极片100和负极片100。
如图4所示，极片100成型方法包括：
步骤S100，对基材1000进行极耳20裁切，以使基材1000形成主体部10、与主体部10相连的边料部200和与主体部10相连且与边料部200分离的多个极耳20。
需要说明的是，若采用该极片100成型方法形成正极片100，基材1000包括正极集流体和涂覆于正极集流体的表面的正极活性物质层，正极活性物质层的宽度小于正极集流体的宽度；若采用该极片100成型方法形成负极片100，基材1000包括负极集流体和涂覆于负极集流体的表面的负极活性物质层，负极活性物质层的宽度小于负 极集流体的宽度。
步骤S200，对基材1000进行边料部200裁切，以将边料部200与主体部10分离。
极片100成型分两步实现，第一进步将极耳20与边料部200分离，这样裁切作业过程中，边料部200抖动对极耳20影响极小，大大降低了因边料部200抖动造成极耳20变形以及极耳20被边料部200拉扯破损，导致产品合格率下降的风险，也能提高极片100成型质量.边料部200与极耳20分离后，再进行边料部200裁切以使边料部200与主体部10分离，完成极片100裁切。
先对基材1000进行极耳20裁切使得极耳20的第一侧边23和第二侧边24均与边料部200分离，在进行边料部200裁切时需要沿某一轨迹裁切至第一根部211和第二根部212即可完成边料部200与主体部10分离，不需要在第一根部211和第二根部212的位置进行转向裁切，节省了转向裁切的时间，从而缩短了极片100成型的时间，提高了极片100生产效率。
在一些实施例中，在步骤S100中，对基材1000进行极耳20裁切包括：
对基材1000进行多次裁切，每次裁切在基材1000上形成使一个极耳20与边料部200分离的一组分切线。
每次裁切形成一组将一个极耳20与边料部200分离的分切线，使得每个极耳20均能与边料部200分离，使得每个极耳20受到边料部200抖动的影响较小，降低因边料部200抖动造成极耳20处基材1000变形以及极耳20被边料部200拉扯破损的风险，从而提高极片100的合格率和极片100质量。
在另一些实施例中，在步骤S100，对基材1000进行极耳20裁切可以包括：
对基材1000进行一次裁切，通过一次裁切在基材1000上形成使多个极耳20与边料部200分离的多组分切线，其中，一组分切线使一个极耳20与边料部200分离。即，一次裁切形成多个极耳20，使得极耳20裁切效率大大提高，从而提高极片100成型效率。
在一些实施例中，对基材1000进行多次裁切包括：
在沿第一方向A移送基材1000的过程中对基材1000进行多次裁切，每次裁切在基材1000上形成使一个极耳20与边料部200分离的一组分切线。
在沿第一方向A移送基材1000的过程中对基材1000进行多次裁切，即移动基材1000和裁切极耳20同时进行，能够提高极耳20裁切效率。
在一些实施例中，基材1000的移送方向与极耳20的宽度方向一致，即第一方向A与极耳20的宽度方向一致。在一些实施例中，基材1000的移送方向与基材1000的长度方向一致。在基材1000的宽度方向的至少一侧裁切形成极耳20。
在一些实施例中，在沿第一方向A移送基材1000的过程中对基材1000进行多次裁切可以包括：
在沿第一方向A移送基材1000的过程中通过裁切装置3100沿第二方向B往复运动对基材1000进行多次裁切；其中，第一方向A与第二方向B相交。
基材1000移送的第一方向A和裁切极耳20的第二方向B相交能够形成具有特定轮廓的极耳20和在基材1000的特定方向上形成极耳20，满足不同的生产和使用需求。裁切装置3100沿第二方向B往复运动进行极耳20裁切，不仅使得各个极耳20轮廓均匀，还能提高极耳20裁切效率。在沿第一方向A移送基材1000的过程中对基材1000进行多次裁切，即移动基材1000和裁切极耳20同时进行，能够提高极耳20裁切效率。
比如，在一些实施例中，第一方向A和第二方向B垂直，则最终形成的倾斜的第一侧边23和第二侧边24。再比如，第一方向A和第二方向B成锐角或者钝角布置。
根据第一方向A和第二方向B所呈的夹角不同，即裁切装置3100相对基材1000的移动方向不同，能够形成不同的极耳20轮廓。
在一些实施例中，如图5、图6、图7所示，每组分切线包括第一分切线和第二分切线。每次裁切在基材1000上形成使一个极耳20与边料部200分离的一组分切线包括：
步骤S1111，通过从极耳20的第一根部211位置沿极耳20的第一侧边23延伸至超出基材1000的宽度方向的边缘的第一位置O1裁切基材1000，以形成第一分切线；
步骤S1112，通过从超出基材1000的宽度方向的边缘的第二位置O2沿极耳20的第二侧边24延伸至极耳20的第二根部212位置裁切基材1000，以形成第二分切线。
需要说明的是，步骤S1111和步骤S1112执行顺序不做限定，即可以先执行步骤S1111，再执行步骤S1112，其中，第一分切线从第一根部211延伸至超出基材1000的宽度方向的边缘的位置，即极耳20的第一侧边23的形成是从极耳20的第一根部211开始裁切，直至基材1000的宽度方向的边缘。将基材1000沿第一方向A一 段距离之后，裁切装置3100相对基材1000从基材1000的宽度方向的边缘外的第一位置O1移动至基材1000的宽度方向的边缘外的第二位置O2。第二分切线从第二位置O2延伸至极耳20的第二根部212，即极耳20的第二侧边24的形成是从第二位置O2开始裁切，直至极耳20的第二根部212。这种裁切方式只需要裁切装置3100沿第二方向B一次往复即可形成将一个极耳20与边料部200分离的一组分切线，且形成的边料部200包括沿第一方向A间断的边料段，相邻的两个间断的边料段分别位于极耳20的第一侧边23所在的一侧和第二侧边24所在的一侧，以适应不同的极片100成型工艺。
在另一些实施例中，也可以是先执行步骤S1112，再执行步骤S1111。
在一些实施例中，第一分切线的一端和第二分切线的一端能够延伸至基材1000的活性物质层上，使得极耳20的部分涂覆有活性物质层，以增强极耳20的结构强度。
在另一些实施例中，第一分切线的一端和第二分切线的一端也可以是延伸至与活性物质层的宽度方向的一侧的位置，则形成的极耳20全部为未涂覆活性物质层的集流体。
其中，裁切装置3100相对基材1000从基材1000的宽度方向的边缘外的第一位置O1移动至基材1000的宽度方向的边缘外的第二位置O2可以是裁切装置3100位置固定，仅仅基材1000沿第一方向A移送，也可以是在基材1000沿第一方向A移送的过程中，裁切装置3100沿与基材1000的移送方向相反的方向运动，从而增大裁切装置3100相对基材1000的移动速度，提高生产效率。
在另一些实施例中，在步骤S111中，每次裁切在基材1000上形成使一个极耳20与边料部200分离的一组分切线可以包括：
通过从极耳20的第一根部211位置沿极耳20的第一侧边23延伸至超出基材1000的宽度方向的边缘的第一位置O1裁切基材1000，以形成第一分切线；
通过从极耳20的第二根部212位置沿极耳20的第二侧边24延伸至超出基材1000的宽度方向的边缘的第二位置O2裁切基材1000，以形成第二分切线。
需要说明的是，可以先执行通过从极耳20的第一根部211位置沿极耳20的第一侧边23延伸至超出基材1000的宽度方向的边缘的第一位置O1裁切基材1000，以形成第一分切线，再通过从极耳20的第二根部212位置沿极耳20的第二侧边24延伸至超出基材1000的宽度方向的边缘的第二位置O2裁切基材1000，以形成第二分切线，其中，第一分切线从第一根部211延伸至超出基材1000的宽度方向的边缘的位置，即极耳20的第一侧边23的形成是从极耳20的第一根部211开始裁切，直至基材1000的宽度方向的边缘。第一侧边23成型后，裁切装置3100停止工作并沿反向移动，同时将基材1000沿第一方向A一段距离，裁切装置3100相对基材1000从第一根部211移动至第二根部212。第二分切线从第二位置O2延伸至极耳20的第二根部212，即极耳20的第二侧边24的形成是从第二根部212开始裁切，直至基材1000的宽度方向的边缘。这种裁切方式需要裁切装置3100沿第二方向B两次往复即可形成将一个极耳20与边料部200分离的一组分切线，且形成的边料部200包括沿第一方向A间断的边料段，相邻的两个间断的边料段分别位于极耳20的第一侧边23所在的一侧和第二侧边24所在的一侧，以适应不同的极片100成型工艺。
其中，裁切装置3100相对基材1000从第一根部211移动至第二根部212可以是裁切装置3100位置固定，仅仅基材1000沿第一方向A移送实现，也可以是在基材1000沿第一方向A移送的过程中，裁切装置3100沿与基材1000的移送方向相反的方向运动实现，从而增大裁切装置3100相对基材1000的移动速度，提高生产效率。
在另一些实施例中，也可以是先执行通过从极耳20的第二根部212位置沿极耳20的第二侧边24延伸至超出基材1000的宽度方向的边缘的第二位置O2裁切基材1000，以形成第二分切线，再先执行通过从极耳20的第一根部211位置沿极耳20的第一侧边23延伸至超出基材1000的宽度方向的边缘的第一位置O1裁切基材1000，以形成第一分切线。
在另一实施例中，每次裁切在基材1000上形成使一个极耳20与边料部200分离的一组分切线包括：
通过从超出基材1000的宽度方向的边缘的第一位置O1沿极耳20的第一侧边23延伸至极耳20的第一根部211位置裁切基材1000，以形成第一分切线；
通过从超出基材1000的宽度方向的边缘的第二位置O2沿极耳20的第二侧边24延伸至极耳20的第二根部212位置裁切基材1000，以形成第二分切线。
需要说明的是，可以先执行通过从超出基材1000的宽度方向的边缘的第一位置O1沿极耳20的第一侧边23延伸至极耳20的第一根部211位置裁切基材1000，以形成第一分切线；再次通过从超出基材1000的宽度方向的边缘的第二位置O2沿极耳20的第二侧边24延伸至极耳20的第二根部212位置裁切基材1000，以形成第二分切线，其中，第一分切线从超出基材1000的宽度方向的边缘的第一位置O1延伸至第一根部211，即极耳20的第一侧边23的形成是从基材1000的宽度方向的边缘外的第一位置O1开始裁切，直至第一根部211。第一侧边23成型后，裁切装置3100停止裁切并沿第二方向B反向移动，同时基材1000沿第一方向A一段距离，裁切装置3100相对基材1000从基材1000的宽度方向的边缘外的第一位置O1移动至基材1000的宽度方向的边缘外的第二位置 O2。第二分切线从第二位置O2延伸至极耳20的第二根部212，即极耳20的第二侧边24的形成是从第二位置O2开始裁切，直至极耳20的第二根部212。这种裁切方式需要裁切装置3100沿第二方向B两次往复方可形成将一个极耳20与边料部200分离的一组分切线，且形成的边料部200包括沿第一方向A间断的边料段，相邻的两个间断的边料段分别位于极耳20的第一侧边23所在的一侧和第二侧边24所在的一侧，以适应不同的极片100成型工艺。
其中，裁切装置3100相对基材1000从基材1000的宽度方向的边缘外的第一位置O1移动至基材1000的宽度方向的边缘外的第二位置O2可以是通过裁切装置3100位置固定，仅基材1000沿第一方向A移送实现，也可以是通过在基材1000沿第一方向A移送的过程中，裁切装置3100沿与基材1000的移送方向相反的方向运动实现，从而增大裁切装置3100相对基材1000的移动速度，提高生产效率。
在另一些实施例中，可以先通过从超出基材1000的宽度方向的边缘的第二位置O2沿极耳20的第二侧边24延伸至极耳20的第二根部212位置裁切基材1000，以形成第二分切线，再通过从超出基材1000的宽度方向的边缘的第一位置O1沿极耳20的第一侧边23延伸至极耳20的第一根部211位置裁切基材1000，以形成第一分切线。
在一些实施例中，如图8、图9、图10所示，每组分切线包括第三分切线、第四分切线和第五分切线，第三分切线和第五分切线分别连接于第四分切线的两端。每次裁切在基材1000上形成使一个极耳20与边料部200分离的一组分切线包括：
步骤S1117，通过从极耳20的第一根部211沿着极耳20的第一侧边23延伸至极耳20的顶边22裁切基材1000，以形成第三分切线；
步骤S1118，通过沿极耳20的顶边22对基材1000进行裁切，以形成第四分切线；
步骤S1119，通过从极耳20的顶边22沿极耳20的第二侧边24延伸至极耳20的第二根部212裁切基材1000，以形成第五分切线；
第三分切线、第四分切线与第五分切线共同将一个所述极耳20与所述边料部200分离。
先后依次执行步骤S1117、步骤S1118和步骤S1119，分离极耳20和边料部200的第三分切线是从极耳20的第一根部211沿着极耳20的第一侧边23延伸至极耳20的顶边22裁切形成的，分离极耳20和边料部200的第四分切线是沿极耳20的顶边22对基材1000进行裁切形成的，分离极耳20和边料部200的第五分切线是从极耳20的顶边22沿极耳20的第二侧边24延伸至极耳20的第二根部212裁切形成的，则第三分切线、第四分切线和第五分切线形成的边料部200为连续的边料部200，以适应不同的极片100成型工艺。
在另一些实施例中，可以先执行步骤S1119、再执行步骤S1118，最后执行步骤S1117。
在一些实施例中，步骤S200包括：
通过沿相邻的第一根部211和第二根部212之间的连线裁切基材1000，以将边料部200与主体部10分离。
其中，沿相邻的第一根部211和第二根部212之间的连线裁切基材1000，可以是保持裁切装置3100的相对位置固定、通过基材1000沿第一方向A移送，以使裁切装置3100相对基材1000从第一根部211移动至第二根部212；也可以是裁切装置3100和基材1000均移动，裁切装置3100的移动方向和基材1000的移送方向相反，以增大裁切装置3100和基材1000的相对移动速度，从而提高极片100成型效率。沿相邻的第一根部211和第二根部212的连线将边料部200和主体部10分离，以使裁切形成的主体部10轮廓规则，提高极片100成型质量。
如图11所示，在一些实施例中，极片100成型方法还包括：
步骤S300，在对基材1000进行极耳20裁切时，进行第一次负压除尘处理；
步骤S400，在对基材1000进行边料部200裁切时，进行第二次负压除尘处理，第一次负压除尘处理的负压压力小于或等于所述第二次负压除尘处理的负压压力。在对基材1000进行极耳20裁切时和对基材1000进行边料部200裁切时均进行负压除尘处理，能够保证极片100成型环境的清洁和减少裁切基材1000过程中产生的粉尘对极片100的影响。
实际生产中，对基材1000进行极耳20裁切时产生的粉尘量小于对基材1000进行边料部200裁切时产生的粉尘量，因此，在一些实施例中，第一次负压除尘处理的负压压力小于或者等于第二次负压除尘处理的负压压力，以使除尘装置3300的除尘能力与产生的粉尘量相匹配，以尽可能充分除尘，不仅能满足除尘需求，还能起到节能、节约成本的作用。
如图12所示，本申请实施例还提供一种极片成型设备3000，极片成型设备3000包括裁切装置3100，裁切装置3100被配置为对基材1000进行极耳20裁切，以使所述基材1000形成主体部10、与所述主体部10相连的边料部200和与所述主体部10相连且与所述边料部200分离的多个极耳20；以及被配置为对所述基材1000进行边料部200裁切，以将所述边料部200与所述主体部10分离。
裁切装置3100能够分两步对基材1000进行裁切，第一进步对基材1000进行极耳20裁切，以使极耳20 与边料部200分离，这样裁切作业过程中，边料部200抖动对极耳20影响极小，大大降低了因边料部200抖动造成极耳20处基材1000变形以及极耳20被边料部200拉扯破损，导致产品合格率下降的风险，边料部200与极耳20分离后，裁切装置3100再对基材1000进行边料部200裁切以使边料部200与主体部10分离，完成极片100裁切。
请继续参见图12，在一些实施例中，裁切装置3100包括第一裁切装置3110和第二裁切装置3120。第一裁切装置3110被配置对基材1000进行极耳20裁切，以使基材1000形成主体部10、与主体部10相连的边料部200和与主体部10相连且与边料部200分离的多个极耳20；第二裁切装置3120被配置为对基材1000进行边料部200裁切，以将边料部200与主体部10分离。
对基材1000进行极耳20裁切和对基材1000进行边料部200裁切分别采用不同的裁切装置3100，使得裁切极耳20和裁切边料部200的步骤互不影响，有利于形成高质量的极片100。且第一裁切装置3110和第二裁切装置3120能够被独立控制，使得极片成型设备3000操作更加灵活。第一裁切装置3110和第二裁切装置3120能够同时工作，即在第一裁切装置3110对基材1000进行极耳20裁切的过程中，第二裁切装置3120能够将已经与极耳20分离的边料部200与主体部10分离，从而提高，从而提高极片100生产效率。
请继续参见图12，在一些实施例中，极片成型设备3000还包括移送装置3200，移送装置3200被配置为沿第一方向A移送基材1000。移送装置3200移送基材1000以使裁切装置3100能够在基材1000的不同位置形成极耳20，便于形成多极耳20极片100。此外，裁切装置3100还能在移送装置3200移动基材1000的过程中对基材1000进行极耳20裁切和对基材1000进行边料部200裁切，能够提高裁切效率，进而提高极片100生产效率。
如图12所示，移送装置3200包括释放辊(图中未示出)、卷绕辊(图中未示出)和传送辊3210，基材1000缠绕于释放辊的周面，卷绕辊被配置从基材1000的一端对基材1000进行收卷以使基材1000缠绕于卷绕辊上，释放辊与卷绕辊同时转动，释放辊转动使缠绕于释放辊上的基材1000逐渐脱离释放辊，卷绕辊转动使从释放辊上脱离的基材1000逐渐卷绕于卷绕辊上。传动辊用于将基材1000从释放辊向卷绕辊传送。
在一些实施例中，第二裁切装置3120设于第一裁切装置3110的下游；第一裁切装置3110被配置为在移送装置3200沿第一方向A移送基材1000的过程中对基材1000进行极耳20裁切；第二裁切装置3120被配置为在移送装置3200沿第一方向A移送所述基材1000的过程中对基材1000进行边料部200裁切。
需要说明的是，本申请所述的“下游”和“上游”是指极片100成型的工序执行的先后，并非是对第一裁切装置3110和第二裁切装置3120在空间位置上的限定。
第二裁切装置3120位于第一裁切装置3110的下游，是指第二裁切装置3120执行的工序在第一裁切装置3110执行的工序之后。对第一裁切装置3110而言，第一裁切装置3110位于第二裁切装置3120的上游，换句话说，第一裁切装置3110执行的工序在第二裁切装置3120执行的工序之前。
基材1000完成了极耳20裁切的部分能够在移送装置3200的作用下被移动至第二裁切装置3120处，并由第二裁切装置3120进行边料部200裁切，这样对基材1000进行极耳20裁切和对基材1000进行边料部200裁切能够连续进行，第一裁切装置3110能够持续对基材1000进行极耳20裁切，第二裁切装置3120能够持续对基材1000进行边料部200裁切，能够提高裁切效率，进而提高极片100生产效率。
在一些实施例中，第一裁切装置3110和第二裁切装置3120中至少一者为激光裁切装置3100。激光裁切装置3100具有裁切质量好、裁切精度高、裁切速度快、后期维护成本低等优点。
其中，第一裁切装置3110和第二裁切装置3120中至少一者为激光裁切装置3100，是指第一裁切装置3110或者第二裁切装置3120为激光裁切装置3100，也可以是第一裁切装置3110和第二裁切装置3120均为激光裁切装置3100。
第一裁切装置3110和第二裁切装置3120也可以是其他形式，比如，第一裁切装置3110和第二裁切装置3120为冲压装置，通过冲压的方式实现极耳20裁切和边料部200裁切。
请结合参见图12、图13所示，在一些实施例中，极片成型设备3000还包括除尘装置3300，除尘装置3300被配置为清除裁切装置3100裁切基材1000时在基材1000上产生的粉尘。在裁切装置3100裁切基材1000时，通过除尘装置3300清除裁切时产生的粉尘，能够保证极片100成型环境的清洁和减少裁切基材1000过程中产生的粉尘对极片100的影响。
在一些实施例中，除尘装置3300包括第一除尘装置3310和第二除尘装置3320。第一除尘装置3310被配置为清除第一裁切装置3110对基材1000进行极耳20裁切时在基材1000上产生的粉尘。第二除尘装置3320被配置为清除第二裁切装置3120对基材1000进行边料部200裁切时在基材1000上产生的粉尘。第一裁切装置3110和第二裁切装置3120分别对应设置有第一除尘装置3310和第二除尘装置3320，在对基材1000进行极耳20裁切时和对基材1000进行边料部200裁切时均进行除尘处理，除尘效果更好，能够保证极片100成型环境的清洁和减少裁切基材1000过程中产生的粉尘对极片100的影响。
在另一些实施例中，极片成型设备3000也可以只包括一个除尘装置3300，即在对基材1000进行极耳20裁切和对基材1000进行边料部200裁切时通过同一个除尘装置3300进行除尘处理。
在一些实施例中，第一除尘装置3310包括第一负压发生装置，第二除尘装置3320包括第二负压发生装置，第二负压发生装置工作时的负压压力大于或等于第一负压发生装置工作时的负压压力。
通过负压的方式除尘使得粉尘更容易向某一位置(比如粉尘收集位置)汇集，降低粉尘在裁切环境中扩散的可能性，使得负压除尘后的气体含尘浓度低，可有效防止或减少装置的磨损。且负压输送简单，易于实现。
由于对基材1000进行极耳20裁切时产生的粉尘量小于对基材1000进行边料部200裁切时产生的粉尘量，因此，第二负压发生装置工作时的负压压力大于或者等于第一负压发生装置工作时的负压压力，不仅能满足除尘需求，还能起到节能、节约成本的作用。
请结合参见13、图14，第一负压发生装置包括至少一个第一负压发生机构3311，第一负压发生机构3311包括吸附支撑部33111、第一负压泵(图中未示出)、第二负压泵(图中未示出)和排尘管道33112；吸附支撑部33111的内部形成第一吸附腔(图中未示出)和第二吸附腔(图中未示出)，排尘管道33112与第二吸附腔连通。吸附支撑部33111具有吸附面33113，吸附面33113上设有与第一吸附腔连通的多个吸附孔33114，第一负压泵用于使第一吸附腔内形成负压，以使基材1000能够在负压的作用下贴附于吸附面33113；吸附面33113上还设有与第二吸附腔连通的吸尘孔33115，第一裁切装置3110在基材1000与第一吸尘孔33115相对应的位置对基材1000进行极耳20裁切，第二负压泵用于使第二吸附腔内形成负压，以使第一裁切装置3110在进行极耳20裁切时产生的粉尘能够从吸尘孔33115进入第二吸附腔并从排尘管道33112排出。
如图14所示，吸附支撑部33111还具有与吸附面33113相对布置的裁切面33116，裁切面33116上设有裁切孔33117，裁切孔33117与吸尘孔33115对齐并与第二吸附腔连通。第一裁切装置3110出设的激光依次穿过裁切孔33117、第二吸附腔和吸尘孔33115到达基材1000并对基材1000进行极耳20裁切。
如图15所示，在一些实施例中，第一负压发生装置包括两个第一负压发生机构3311。两个第一负压发生机构3311的吸附面33113相对间隔布置。基材1000位于两个第一负压发生机构3311的吸附面33113之间，两个第一负压发生机构3311的吸附面33113的布置方向与基材1000位于两个吸附面33113之间的部分的移送方向垂直，第一负压发生机构3311的排尘管道33112的轴线与基材1000位于两个吸附面33113之间的部分的移送方向平行。
在一些实施例中，第一负压发生装置包括一个第一负压发生机构3311。
在一些实施例中，极片成型设备3000还包括导废料装置3330，导废料装置3330被配置为在边料部200与主体部10分离后将边料部200引导至废料收集处3400。导废料装置3330能够在边料部200与主体部10分离后及时将边料部200因导致废料收集处3400，提高作业效率。
导废料装置3330设置于第二裁切装置3120的下游。如图16所示，在一些实施例中，导废料装置3330包括安装架3331、吸附带3332、主动轮3333、从动轮3334、驱动件3335和第三负压泵(图中未示出)。驱动件3335安装于安装架3331，主动轮3333安装于驱动件3335的输出轴，从动轮3334转动连接于安装架3331并与主动轮3333间隔布置，从动轮3334的转动轴线与主动轮3333的转动轴线平行，吸附带3332绕设于主动轮3333和从动轮3334，第三负压泵吸用于在吸附带3332的内侧形成负压，以使边料部200在经过吸附带3332时能够在负压的作用下吸附于吸附带3332的表面并跟随吸附带3332的传动方向被引导至废料收集处3400。
以上仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (17)

  1. 一种极片成型方法，所述极片包括主体部和极耳，所述极耳从所述主体部的边缘凸出于所述主体部，包括：
    对基材进行极耳裁切，以使所述基材形成所述主体部、与所述主体部相连的边料部和与所述主体部相连且与所述边料部分离的多个所述极耳；
    对所述基材进行边料部裁切，以将所述边料部与所述主体部分离。
  2. 根据权利要求1所述的极片成型方法，其中，所述对基材进行极耳裁切包括：
    对所述基材进行多次裁切，每次裁切在所述基材上形成使一个所述极耳与所述边料部分离的一组分切线。
  3. 根据权利要求1或2所述的极片成型方法，其中，所述对所述基材进行多次裁切包括：
    在沿第一方向移送所述基材的过程中对所述基材进行多次裁切，每次裁切在所述基材上形成使一个所述极耳与所述边料部分离的一组分切线。
  4. 根据权利要求3所述的极片成型方法，其中，所述在沿第一方向移送所述基材的过程中对所述基材进行多次裁切包括：
    在沿所述第一方向移送所述基材的过程中通过裁切装置沿第二方向往复运动对所述基材进行多次裁切；
    其中，所述第一方向与所述第二方向相交。
  5. 根据权利要求2-4任一项所述的极片成型方法，其中，每组分切线包括第一分切线和第二分切线；
    所述每次裁切在所述基材上形成使一个所述极耳与所述边料部分离的一组分切线包括：
    通过从所述极耳的第一根部位置沿所述极耳的第一侧边延伸至超出所述基材的宽度方向的边缘的第一位置裁切所述基材，以形成所述第一分切线；
    通过从超出所述基材的宽度方向的边缘的第二位置沿所述极耳的第二侧边延伸至所述极耳的第二根部位置裁切所述基材，以形成所述第二分切线。
  6. 根据权利要求2-5任一项所述的极片成型方法，其中，每组分切线包括第三分切线、第四分切线和第五分切线，所述第三分切线和所述第五分切线分别连接于所述第四分切线的两端；
    所述每次裁切在所述基材上形成使一个所述极耳与所述边料部分离的一组分切线包括：
    通过从所述极耳的第一根部沿着所述极耳的第一侧边延伸至所述极耳的顶边裁切所述基材，以形成所述第三分切线；
    通过沿所述极耳的顶边对所述基材进行裁切，以形成所述第四分切线；
    通过从所述极耳的顶边沿所述极耳的第二侧边延伸至所述极耳的第二根部裁切所述基材，以形成所述第五分切线；
    所述第三分切线、所述第四分切线与所述第五分切线共同将一个所述极耳与所述边料部分离。
  7. 根据权利要求5或6所述的极片成型方法，其中，每两个相邻的所述极耳具有相邻的第一根部和第二根部；
    所述对所述基材进行边料部裁切，以将所述边料部与所述主体部分离包括：
    通过沿相邻的所述第一根部和所述第二根部之间的连线裁切所述基材，以将所述边料部与所述主体部分离。
  8. 根据权利要求1-7任一项所述的极片成型方法，其中，所述极片成型方法还包括：
    在对基材进行极耳裁切时，进行第一次负压除尘处理；
    在对基材进行边料部裁切时，进行第二次负压除尘处理；
    所述第一次负压除尘处理的负压压力小于或等于所述第二次负压除尘处理的负压压力。
  9. 一种极片成型设备，其中，包括：
    裁切装置，被配置为对基材进行极耳裁切，以使所述基材形成主体部、与所述主体部相连的边料部和与所述主体部相连且与所述边料部分离的多个极耳；以及被配置为对所述基材进行边料部裁切，以将所述边料部与所述主体部分离。
  10. 根据权利要求9所述的极片成型设备，其中，所述裁切装置包括第一裁切装置和第二裁切装置；
    所述第一裁切装置被配置对所述基材进行极耳裁切，以使所述基材形成所述主体部、与所述主体部相连的所述边料部和与所述主体部相连且与所述边料部分离的多个所述极耳；
    所述第二裁切装置被配置为对所述基材进行边料部裁切，以将所述边料部与所述主体部分离。
  11. 根据权利要求10所述的极片成型设备，其中，所述极片成型设备还包括移送装置，所述移送装置被配置为沿第一方向移送所述基材。
  12. 根据权利要求11所述的极片成型设备，其中，所述第二裁切装置设于所述第一裁切装置的下游；
    所述第一裁切装置被配置为在所述移送装置沿所述第一方向移送所述基材的过程中对所述基材进行极耳裁切；
    所述第二裁切装置被配置为在所述移送装置沿所述第一方向移送所述基材的过程中对所述基材进行边料部裁切。
  13. 根据权利要求10-12任一项所述的极片成型设备，其中，所述第一裁切装置和所述第二裁切装置中至少一者为激光裁切装置。
  14. 根据权利要求10-13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除尘装置，所述除尘装置被配置为清除所述裁切装置裁切所述基材时在所述基材上产生的粉尘。
  15. 根据权利要求14所述的极片成型设备，其中，所述除尘装置包括第一除尘装置和第二除尘装置；
    所述第一除尘装置被配置为清除所述第一裁切装置对所述基材进行极耳裁切时在所述基材上产生的粉尘；
    所述第二除尘装置被配置为清除所述第二裁切装置对所述基材进行边料部裁切时在所述基材上产生的粉尘。
  16. 根据权利要求15所述的极片成型设备，其中，所述第一除尘装置包括第一负压发生装置，所述第二除尘装置包括第二负压发生装置，所述第二负压发生装置工作时的负压压力大于或等于所述第一负压发生装置工作时的负压压力。
  17. 根据权利要求9-16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导废料装置，所述导废料装置被配置为在所述边料部与所述主体部分离后将所述边料部引导至废料收集处。
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