WO2023050872A1 - 模切装置 - Google Patents

模切装置 Download PDF

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Publication number
WO2023050872A1
WO2023050872A1 PCT/CN2022/097941 CN2022097941W WO2023050872A1 WO 2023050872 A1 WO2023050872 A1 WO 2023050872A1 CN 2022097941 W CN2022097941 W CN 2022097941W WO 2023050872 A1 WO2023050872 A1 WO 2023050872A1
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WO
WIPO (PCT)
Prior art keywords
cutting
pole piece
limiting member
die
cutting mechanism
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2022/097941
Other languages
English (en)
French (fr)
Inventor
吴铁锋
黄相强
禹如初
邓志勇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Contemporary Amperex Technology Co Ltd
Original Assignee
Contemporary Amperex Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Contemporary Amperex Technology Co Ltd filed Critical Contemporary Amperex Technology Co Ltd
Priority to ES22874270T priority Critical patent/ES3060661T3/es
Priority to MX2023006240A priority patent/MX2023006240A/es
Priority to EP22874270.6A priority patent/EP4234155B1/en
Publication of WO2023050872A1 publication Critical patent/WO2023050872A1/zh
Priority to US18/324,430 priority patent/US11986906B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • 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
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • B23K26/083—Devices involving movement of the workpiece in at least one axial direction
    • 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
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • B23K26/0869—Devices involving movement of the laser head in at least one axial direction
    • 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
    • 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
    • B23K37/00—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass
    • 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
    • B23K37/00—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass
    • B23K37/02—Carriages for supporting the welding or cutting element
    • B23K37/0211—Carriages for supporting the welding or cutting element travelling on a guide member, e.g. rail, track
    • B23K37/0235—Carriages for supporting the welding or cutting element travelling on a guide member, e.g. rail, track the guide member forming part of a portal
    • 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
    • B23K37/00—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass
    • B23K37/04—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for holding or positioning work
    • B23K37/0408—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for holding or positioning work for planar work
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0404—Machines for assembling batteries
    • 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
    • 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
    • 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 die-cutting device.
  • 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. .
  • An embodiment of the present application provides a die-cutting device to improve the forming quality of pole pieces.
  • the embodiment of the present application provides a die-cutting device, including a conveying mechanism, a first cutting mechanism, a first limiting member, and a second limiting member; the conveying mechanism is used to convey pole pieces, and the pole piece
  • the sheet includes an uncoated area and a coated area, the uncoated area is connected to the coated area; the first cutting mechanism is located on one side in the thickness direction of the pole piece, and the first cutting mechanism The cutting mechanism is used to cut the uncoated area, so that the uncoated area forms an edge part connected with the coated area and a part connected with the coated area and separated from the edge part.
  • the first limiting member is located between the pole piece and the first cutting mechanism in the thickness direction, and the first limiting member is provided for sending out by the first cutting mechanism
  • the cutting hole through which the laser passes, the cutting hole is adapted to the cutting track of the laser
  • the second limiting member is located in the thickness direction of the pole piece away from the first limiting One side of the piece, the second limiting piece and the first limiting piece are configured to cooperatively limit the pole piece in the thickness direction.
  • both the conveying force of the conveying mechanism and the cutting force of the cutting mechanism may cause the pole pieces to vibrate in the thickness direction, making the cutting unstable and affecting
  • the cutting quality of the tabs may cause the pole pieces to fall out of the cutting range of the cutting mechanism when the vibration of the pole pieces is too large, resulting in insufficient cutting or cutting.
  • the first limiter and the second limiter, the first limiter and the second limiter respectively limit the pole piece on both sides of the thickness direction of the pole piece, thereby cooperating to limit the shaking range of the pole piece in the thickness direction, Improve the stability of cutting, thereby improving the quality of pole piece forming.
  • the first stopper is located between the pole piece and the first cutting mechanism in the thickness direction of the pole piece, and the setting of the cutting hole can allow the laser light emitted by the first cutting mechanism to pass through to realize cutting the pole piece. Avoid laser cutting the first stopper.
  • the first limiting member and the second limiting member at least partially overlap to form an overlapping area, and the first cutting mechanism uses The uncoated area is trimmed at the overlapping area.
  • the first cutting mechanism cuts the uncoated area in the overlapping area formed by the first limiting member and the second limiting member. Therefore, the pole piece corresponding to the cutting area of the first cutting mechanism is in the Both sides of the thickness direction are limited, which can limit the shaking range of the pole piece in the thickness direction, and can limit the shaking degree of the pole piece in the thickness direction of the pole piece within the cutting range of the first cutting mechanism, which can improve Cutting stability, which can improve cutting stability.
  • the first limiting member includes a first rolling body against which the uncoated area abuts.
  • the shaking of the pole piece in the thickness direction may make the uncoated area of the pole piece abut against the first stopper, and the first rolling body of the first stopper abuts against the uncoated area, so that the uncoated area It forms a rolling frictional contact with the first limiter, and the frictional damping of the uncoated area is small, which improves the stability of the pole piece transmission and reduces the wear of the pole piece, and effectively prevents the pole piece from being damaged after the pole piece is separated from the edge material.
  • the large damping between the first limiter and the first limiter will cause the ear to tear, and even cause serious problems such as broken belts.
  • the first rolling body is arranged downstream of the first cutting mechanism.
  • the edge material part and the tab are separated, there is no mutual restriction between the edge material part and the tab, and the contact between the tab and the edge material part and the first stopper is easy to be stuck with the first stopper Therefore, the first rolling body is arranged downstream of the first cutting mechanism, and the separated tabs and trim parts can form a rolling fit with the first limiting part, reducing the contact between the tabs and trim parts and the first limiting part. Risk of tab tearing and strip breakage due to stuck parts.
  • the first limiting member further includes a first limiting portion and a first connecting portion, the first rolling body is mounted on the first connecting portion, and the first A surface of a limiting portion facing the pole piece is flush with an edge of the first rolling body against which the uncoated area abuts.
  • the surface of the first limiting part facing the pole piece is flush with the edge of the first rolling body that is abutted against by the uncoated area, so the distance between the first limiting part and the first rolling body and the pole piece is the same , allowing the same shaking range of the pole piece in the thickness direction, thereby improving the stability of cutting and reducing the risk of large deformation of the pole piece, so as to improve the forming quality of the pole piece.
  • the die-cutting device further includes: a second cutting mechanism and a guiding mechanism; the second cutting mechanism is arranged on one side of the pole piece along the thickness direction , the second cutting mechanism is arranged downstream of the first cutting mechanism, the second cutting mechanism is used to cut the edge material part, so as to combine the edge material part with the coating area Separation: the guiding mechanism is arranged downstream of the first limiting member, and the guiding mechanism is configured to drive the edge material portion to deviate in a direction approaching the second cutting mechanism.
  • the first cutting mechanism and the second cutting mechanism make the forming of the pole piece be realized in two steps, and the first step separates the tab from the edge material, so that during the cutting operation, the edge material vibrates against the electrode
  • the influence of the lug is very small, which greatly reduces the risk of the deformation of the tab caused by the shaking of the edge material and the damage of the tab being pulled by the edge material, resulting in a decrease in the product qualification rate, and can also improve the forming quality of the pole piece.
  • the edge material is cut to separate the edge material from the coating area, and the pole piece cutting is completed.
  • the guide mechanism drives the edge material to deviate in the direction close to the second cutting mechanism , to compensate for the deformation of the pole piece during the cutting process of the first cutting mechanism, so that the edge material is shifted to the cutting range of the second cutting mechanism, so as to ensure that the second cutting mechanism can correct the pole piece effective cropping.
  • the guiding mechanism is an adsorption mechanism, and the guiding mechanism and the second cutting mechanism are located on the same side in the thickness direction.
  • the guide mechanism is an adsorption mechanism, and the uncoated area is driven to deviate in a direction close to the second cutting mechanism by means of adsorption, so that the offset amount of the edge material can be controlled more accurately.
  • the adsorption mechanism includes an adsorption surface provided with a plurality of adsorption holes.
  • the arrangement of the adsorption holes can improve the stability of the adsorption, thereby effectively improving the cutting stability of the cutting of the side material.
  • the guide mechanism and the first limiting member are located on the same side in the thickness direction; the second limiting member includes a the second rolling body.
  • the guide mechanism and the first stopper are located on the same side of the pole piece in the thickness direction, and the uncoated area may be offset by the second stopper due to the shaking of the pole piece in the thickness direction, and the second stopper
  • the second rolling body is against the uncoated area, so that the uncoated area forms rolling friction contact with the second limiter, and the frictional damping received by the uncoated area is small, which improves the stability of the pole piece transmission and reduces the pole piece
  • the wear and tear of the tab can effectively prevent the lug from being separated from the edge material, and the large damping between the tab and the second limiter will cause the tab to tear, and even cause serious problems such as broken belts.
  • the number of the second rolling bodies is multiple, the multiple second rolling bodies are located downstream of the first cutting mechanism, and the multiple second rolling bodies A portion of the plurality of second rolling elements is located upstream of the second cutting mechanism, and a portion of the plurality of second rolling elements is located downstream of the second cutting mechanism.
  • the second limiting member further includes a second limiting portion and a second connecting portion, the second rolling body is mounted on the second connecting portion, and the first The surface of the two limiting parts facing the pole piece is flush with the edge of the second rolling body against which the edge material part abuts.
  • the surface of the second limiting part facing the pole piece is flush with the edge of the second rolling body that is abutted against by the uncoated area, so the distance between the second limiting part and the second rolling body and the pole piece is the same , allowing the same shaking range of the pole piece in the thickness direction, thereby improving the stability of cutting and reducing the risk of large deformation of the pole piece, so as to improve the forming quality of the pole piece.
  • the die-cutting device further includes a third stopper, and the third stopper is arranged on one side of the coating area along the thickness direction, so The third limiting member is configured to limit the coating area in the offset direction of the trim portion.
  • the edge material part since the guide mechanism drives the edge material part to deviate in the direction close to the second cutting mechanism, the edge material part will drive the coating area to shift and cause the pole piece to deform, and the third stopper will Limiting the coating area in the offset direction of the material part can limit the maximum deformation of the pole piece and improve the forming quality of the pole piece.
  • the third limiting member is provided with a plurality of through holes.
  • the third limiting member is provided with a plurality of through holes, so that dust is not easy to accumulate on the third limiting member, and the arrangement of the through holes can also reduce the weight of the third limiting member.
  • the die-cutting device further includes: a dust removal mechanism, configured to remove dust from the pole piece when the second cutting mechanism cuts the edge material of the pole piece. Dust generated on the tablet.
  • the coating of part of the coating area will be cut, and cutting the coating will generate a lot of dust.
  • the dust removal mechanism is used to remove the dust caused by the second cutting mechanism.
  • the dust generated on the pole piece when cutting the side material of the pole piece keeps a clean cutting environment, avoids the influence of dust on the cutting operation of the second cutting mechanism, and is conducive to improving the forming quality of the pole piece.
  • the conveying mechanism includes a first driving roller and a second driving roller, and the first driving roller and the second driving roller cooperate to convey the pole piece, along the In the conveying direction of the pole piece, the first limiting member and the second limiting member are located between the first driving roller and the second driving roller.
  • the first transmission roller and the second transmission roller cooperate to convey the pole piece, which can improve the conveying stability, thereby improving the cutting stability and the forming quality of the pole piece.
  • Figure 1 is a schematic structural view of a die-cutting device provided in some embodiments of the present application.
  • Fig. 2 is a schematic structural diagram of a first viewing angle of a first limiting member provided by some embodiments of the present application;
  • Fig. 3 is a schematic structural diagram of the second viewing angle of the first limiting member provided by some embodiments of the present application.
  • Fig. 4 is a schematic structural diagram of a third viewing angle of a first limiting member provided by some embodiments of the present application.
  • Fig. 5 is a schematic structural diagram of a die-cutting device provided by other embodiments of the present application.
  • Fig. 6 is a schematic structural view of an adsorption mechanism provided with adsorption holes
  • FIG. 7 is a schematic structural diagram of a second limiting member provided in the embodiment of the present application.
  • Fig. 8 is a schematic structural diagram of a die-cutting device provided in some other embodiments of the present application.
  • Icons 100-die-cutting device; 10-conveying mechanism; 11-first driving roller; 12-second driving roller; 20-first cutting mechanism; 30-first limiting member; 31-first cutting hole ; 32-the first rolling body; 33-the first limiting part; 331-the first surface; body; 43-second limiting part; 44-second connecting part; 50-guiding mechanism; 51-adsorption surface; 52-first adsorption hole; 53-second adsorption hole; 60-second cutting mechanism; 70 -Third limit piece; 71-through hole; 80-dust removal mechanism; 90-edge material collection mechanism; 200-pole piece; 210-uncoated area; The thickness direction of the pole piece; B-the transmission direction of the pole piece; the width direction of the C-pole piece.
  • 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.
  • Power batteries are not only used in energy storage power systems such as hydraulic, thermal, wind and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric vehicles, as well as military equipment and aerospace and other fields . With the continuous expansion of power battery application fields, its market demand is also constantly expanding.
  • the battery cell of the battery 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.
  • Both the positive electrode sheet and the negative electrode sheet include a coated area and an uncoated area. Along the width direction of the electrode sheet, the uncoated area is connected to the coated area and protrudes from the coated area.
  • the coating area is coated with a positive electrode active material layer.
  • the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate, etc.
  • the coating area is coated with In addition to the negative electrode active material layer, the negative electrode active material can be carbon or silicon.
  • the lug of the pole piece is formed in the uncoated area. In some other embodiments, in order to ensure the structural strength of the tab, the part of the tab near the coating area may also be coated with a certain active material layer.
  • the inventor has designed a die-cutting device after in-depth research.
  • the first and second stoppers are respectively provided with cutting holes for the laser to pass through, and the first stopper and the second stopper respectively limit the pole piece on both sides of the thickness direction of the pole piece, Therefore, in cooperation with limiting the shaking range of the pole piece in the thickness direction, the stability of cutting is improved, thereby improving the forming quality of the pole piece.
  • the first stopper is located between the pole piece and the first cutting mechanism in the thickness direction of the pole piece, and the setting of the cutting hole can allow the laser light emitted by the first cutting mechanism to pass through to realize cutting the pole piece. Avoid laser cutting the first stopper.
  • FIG. 1 is a schematic structural diagram of a die-cutting device 100 provided by some embodiments of the present application.
  • the die-cutting device 100 includes a conveying mechanism 10, a first cutting mechanism 20, a first limiting member 30 and a second limiting member 40; the conveying mechanism 10 is used to convey the pole piece 200, and the pole piece 200 includes an uncoated area 210 ( Shown in Fig. 8) and coated area 220 (shown in Fig.
  • uncoated area 210 is connected to coated area 220;
  • the first cutting mechanism 20 is positioned at one side on the thickness direction A of pole piece, the second A cutting mechanism 20 is used to cut the uncoated area 210, so that the uncoated area 210 forms an edge material part (not shown) that is connected with the coated area 220 and is connected with the coated area 220 and connected with the edge
  • the pole lug (not shown in the figure) where the material part is separated;
  • the first limiting member 30 is located between the pole piece 200 and the first cutting mechanism 20 in the thickness direction, and the first limiting member 30 is provided for the first cutting mechanism.
  • the cutting hole shown in Fig.
  • the pole piece 200 is located on a side away from the first limiting member 30 in the thickness direction, and the second limiting member 40 and the first limiting member 30 are configured to cooperate to limit the pole piece 200 in the thickness direction.
  • the conveying mechanism 10 includes a first transmission roller 11 and a second transmission roller 12, the first transmission roller 11 and the second transmission roller 12 cooperate to convey the pole piece 200, along the transmission direction B of the pole piece 200, the first Both the limiting member 30 and the second limiting member 40 are located between the first driving roller 11 and the second driving roller 12 .
  • the conveying mechanism 10 conveys the pole piece 200 to the first cutting mechanism 20 at a certain speed, and the first cutting machine emits a laser 300 to the pole piece 200 to cut the uncoated area 210 .
  • the first transmission roller 11 and the second transmission roller 12 cooperate to convey the pole piece 200 , which can improve the conveying stability, thereby improving the cutting stability and the forming quality of the pole piece 200 .
  • the first cutting mechanism 20 is located on one side of the thickness direction A of the pole piece, along the thickness direction A of the pole piece, the first stopper 30 is located between the pole piece 200 and the first cutting mechanism 20, and the first cutting mechanism
  • the laser 300 triggered by 20 acts on the pole piece 200 after passing through the cutting hole on the first limiting member 30 , and cuts the uncoated area 210 of the pole piece 200 .
  • the first cutting mechanism 20 is a laser 300 cutting mechanism, and the conveying mechanism 10 transports the pole piece 200 to the first cutting mechanism 20 at a certain speed, and the first cutting machine sends a laser 300 to the pole piece 200 to cut the uncoated District 210.
  • Cutting hole matches with the cutting track of laser 300 (the laser that the first cutting mechanism 20 sends), can be understood as, the shape of cutting hole and the first cutting mechanism 20 send out. It can also be understood that the laser 300 emitted by the first cutting mechanism 20 can move in the cutting hole, so as to realize the cutting of the pole piece 200 without cutting the first stopper 30, cutting
  • the shape of the cutting hole can be various, for example, the cutting hole is rectangular, font-shaped, circular, etc., as long as the first limiting member 30 can avoid the laser 300 emitted by the first cutting mechanism 20 .
  • cutting holes can also be set on the second limiting member 40, along the thickness direction A of the pole piece, the cutting holes of the first limiting member 30 and the cutting holes of the second limiting member 40 Relatively arranged, the cutting hole on the second limiting member 40 is also used for the laser 300 of the first cutting mechanism 20 to pass through, so as to prevent the laser 300 passing through the pole piece 200 from cutting the second limiting member 40 .
  • the shape and size of the cutting hole provided on the second limiting member 40 can refer to the shape and size of the cutting hole provided on the first limiting member 30 . Shown in the figure for convenience, define the cutting hole on the first spacer 30 as the first cutting hole 31, and the cutting hole on the second spacer 40 as the second cutting hole 41 (Fig. 7 shown in ).
  • both the conveying force of the conveying mechanism 10 and the cutting force of the cutting mechanism may cause the pole piece 200 to vibrate in the thickness direction, making the cutting unstable and affecting the tab.
  • Cutting quality in the case that the pole piece 200 shakes too much, it may also cause the pole piece 200 to break away from the cutting range of the cutting mechanism, resulting in insufficient cutting or cutting.
  • the first limiting member 30 and the second limiting member 40 are provided, and the first limiting member 30 and the second limiting member 40 limit the pole piece 200 on both sides of the thickness direction A of the pole piece respectively, so as to cooperate with the limiting pole piece 200
  • the shaking range in the thickness direction improves the stability of cutting, thereby improving the forming quality of the pole piece 200 .
  • the first stopper 30 is located between the pole piece 200 and the first cutting mechanism 20 in the thickness direction A of the pole piece, and the setting of the cutting hole can allow the laser 300 emitted by the first cutting mechanism 20 to pass through, so as to achieve The pole piece 200 is cut to avoid cutting the first limiting member 30 by the laser 300 .
  • the first limiting member 30 and the second limiting member 40 at least partially overlap to form an overlapping area, and the first cutting mechanism 20 is used to cut the overlapping area.
  • the uncoated area 210 is cut.
  • the thickness direction mentioned here refers to the thickness direction A of the pole piece.
  • the first limiting member 30 and the second limiting member 40 at least partially overlap and form an overlapping area, which actually means along the thickness direction A of the pole piece. At least part of the projection on the pole piece coincides, it can be in the transmission direction B of the pole piece, the two ends of the first limiter 30 and the two ends of the second limiter 40 are flush; it can also be in the transmission direction B of the pole piece Above, one end of the first limiting member 30 is flush with one end of the second limiting member 40, and the other end of the second limiting member 40 exceeds the other end of the first limiting member 30 along the transmission direction B of the pole piece (such as The relative relationship between the first limiting member 30 and the second limiting member 40 shown in Fig.
  • both the first limiting member 30 and the second limiting member 40 cover at least part of the uncoated area 210 .
  • the laser 300 emitted by the first cutting mechanism 20 is projected on the overlapping area.
  • the first cutting mechanism 20 cuts the uncoated area 210 in the overlapping area formed by the first limiting member 30 and the second limiting member 40. Therefore, the pole piece 200 corresponding to the cutting area of the first cutting mechanism 20 Both sides of its thickness direction are limited, the shaking range of the pole piece 200 in the thickness direction A of the pole piece can be limited, and the shaking degree of the pole piece 200 in the thickness direction A of the pole piece can be limited to the first cut Within the cutting range of the mechanism 20, the cutting stability can be improved.
  • the first limiting member 30 includes a first rolling body 32 against which the uncoated area 210 abuts.
  • the first rolling body 32 may be a roller shaft, a ball, and the like.
  • the shaking of the pole piece 200 in the thickness direction may cause the uncoated area 210 of the pole piece 200 to abut against the first stopper 30, and the first rolling element 32 of the first stopper 30 is against the uncoated area 210, so that the uncoated
  • the cloth area 210 forms a rolling frictional contact with the first limiting member 30, and the frictional damping received by the uncoated area 210 is small, which improves the stability of the transmission of the pole piece 200 and reduces the wear of the pole piece 200, effectively preventing the contact between the tab and the edge.
  • the damping between the tab and the first limiting member 30 is relatively large, resulting in tearing of the tab, and even serious problems such as broken belts.
  • the first rolling body 32 is disposed downstream of the first cutting mechanism 20 .
  • upstream and downstream refer to the sequence of production, upstream refers to the production sequence first, and downstream refers to the production sequence later.
  • upstream and downstream refers to the production sequence later.
  • the spatial positions between the components are not limited.
  • the first rolling body 32 can be one or more (two or more than two), and in the embodiment where the first rolling body 32 is multiple, it can be part of the first rolling body in the plurality of first rolling bodies 32 32 is located upstream of the first cutting mechanism 20 , and another part of the first rolling elements 32 is located downstream of the first cutting mechanism 20 . If the first rolling body 32 is multiple, a plurality of first rolling bodies 32 also can all be positioned at the downstream of the first cutting mechanism 20, as shown in Figure 1, the first rolling body 32 is the roller shaft, and the quantity of the roller shaft is A plurality of rollers are arranged side by side in parallel and at intervals along the conveying direction of the pole piece 200 .
  • the first rolling body 32 is arranged on the downstream of the first cutting mechanism 20, and the separated tabs and trim parts can form a rolling fit with the first stopper 30, reducing the contact between the tabs and trim parts and the first stopper. There is a risk that the piece 30 is stuck, causing the lug to tear and the strap to be broken.
  • FIG. 2 is a schematic structural diagram of the first viewing angle of the first limiting member 30 provided by some embodiments of the present application.
  • a schematic structural diagram of the second viewing angle of the limiting member 30 and FIG. 4 is a structural schematic diagram of the third viewing angle of the first limiting member 30 provided by some embodiments of the present application.
  • the first limiting part 30 further includes a first limiting part 33 and a first connecting part 34, the first rolling element 32 is installed on the first connecting part 34, and the first limiting part 33 faces the pole piece 200 The surface of the first rolling body 32 is flush with the edge of the first rolling body 32 against which the uncoated area 210 abuts.
  • the first limiting part 33 is a plate-shaped structure, the cutting hole of the first limiting part 30 is arranged on the first limiting part 33, and the first connecting part 34 is connected to one end of the first limiting part 33 and is located at the first limiting part 33. Downstream of the positioning portion 33 , the thickness of the first limiting portion 33 is greater than the thickness of the first connecting portion 34 .
  • the first rolling element 32 is rotatably mounted on the first connecting portion 34 .
  • the first rolling body 32 may be driven by a magnetic wheel.
  • the first limiting part 33 has a first surface 331 facing the pole piece 200, and the surface of the first rolling element 32 that is used to abut against the uncoated area 210 is the circumferential surface of the first rolling element 32, "the first limiting The surface of the portion 33 facing the pole piece 200 is flush with the edge of the first rolling element 32 against which the uncoated region 210 abuts" can be understood as the extension surface of the first surface 331 is tangent to the circumferential surface of the first rolling element 32 .
  • the rotation axis of the first rolling element 32 is located on the center plane of the thickness of the first limiting portion 33, then the diameter of the first rolling element 32 is equal to the thickness of the first limiting portion 33, and the first limiting portion
  • the thickness center plane of the portion 33 refers to a plane located at the center of the first limiting portion 33 along the thickness direction of the first limiting portion 33 and parallel to the first surface 331 .
  • the thickness direction of the first limiting portion 33 is consistent with the thickness direction A of the pole piece, the thickness of the first limiting portion 33 refers to the size of the first limiting portion 33 in its thickness direction, and the thickness of the first connecting portion 34 refers to The dimension of the first connecting portion 34 in the thickness direction of the first limiting portion 33 .
  • the surface of the first limiting portion 33 facing the pole piece 200 is flush with the edge of the first rolling element 32 for the uncoated area 210 to abut against, then the first limiting portion 33 and the first rolling element 32 are in contact with the pole piece 200
  • the same distance allows the pole piece 200 to have the same shaking range in the thickness direction, thereby improving the stability of cutting and reducing the risk of large deformation of the pole piece 200 , so as to improve the forming quality of the pole piece 200 .
  • FIG. 5 is a schematic structural diagram of a die-cutting device 100 provided in other embodiments of the present application.
  • the die-cutting device 100 further includes a second cutting mechanism 60 and a guiding mechanism 50; the second cutting mechanism 60 is arranged on one side of the pole piece 200 along the thickness direction, and the second cutting mechanism 60 is arranged on the first Downstream of a cutting mechanism 20, the second cutting mechanism 60 is used for cutting the edge material part, so that the edge material part is separated from the coating area 220; the guide mechanism 50 is arranged on the downstream of the first stopper 30, and the guide mechanism 50 is configured to drive the edge part to deviate in a direction approaching the second cutting mechanism 60 .
  • the second cutting mechanism 60 is a laser 300 cutting mechanism. On the width direction C of the pole piece, the laser 300 emitted by the second cutting mechanism 60 is projected on one side of the adsorption mechanism to avoid the laser 300 of the second cutting mechanism 60. Cut suction mechanism.
  • the first cutting mechanism 20 and the second cutting mechanism 60 enable the formation of the pole piece 200 to be realized in two steps.
  • the first step separates the tab from the edge material, so that during the cutting operation, the shaking of the edge material will affect the tab. It is very small, which greatly reduces the risk of the deformation of the tab caused by the shaking of the edge material and the damage of the tab being pulled by the edge material, resulting in a decrease in the product qualification rate, and can also improve the molding quality of the pole piece 200.
  • the first cutting mechanism 20 and the second cutting mechanism 60 are located on the same side in the thickness direction A of the pole piece. In other embodiments, the first cutting mechanism 20 and the second cutting mechanism 60 may also be respectively located on opposite sides in the thickness direction A of the pole piece.
  • the edge material is cut to separate the edge material from the coating area 220, and the cutting of the pole piece 200 is completed.
  • the guide mechanism 50 drives the edge material to move closer to the second cutting mechanism 60. to compensate for the deformation of the pole piece 200 caused during the cutting process of the first cutting mechanism 20, so that the edge material part is shifted to the cutting range of the second cutting mechanism 60, and the laser 300
  • the cutting range is the reachable range of the laser 300 to ensure that the second cutting mechanism 60 can effectively cut the pole piece 200 .
  • the guiding mechanism 50 is an adsorption mechanism, and the guiding mechanism 50 and the second cutting mechanism 60 are located on the same side in the thickness direction.
  • the thickness direction mentioned here refers to the thickness direction A of the pole piece, and the guiding mechanism 50 and the second cutting mechanism 60 are located on the same side of the thickness direction.
  • the adsorption mechanism may be a negative pressure mechanism.
  • the guide mechanism 50 and the second cutting mechanism 60 can be respectively located on both sides of the thickness direction A of the pole piece. Blowing is performed on the trim part in the direction so that the trim part is shifted toward the direction approaching the second cutting mechanism 60 .
  • the suction mechanism drives the uncoated area 210 in a direction close to the second cutting mechanism 60 by suction, and can control the offset of the edge material more accurately.
  • FIG. 6 is a schematic structural diagram of an adsorption mechanism provided with adsorption holes.
  • the adsorption mechanism includes an adsorption surface 51 provided with a plurality of adsorption holes.
  • the suction mechanism may include a suction belt, and the suction surface 51 is the surface of the suction belt.
  • the diameter of the adsorption hole may be 3 mm.
  • the adsorption surface 51 includes multiple rows of first adsorption holes 52 and at least one row of second adsorption holes 53, and each row of first adsorption holes 52 includes at least two first adsorption holes arranged at intervals along the width direction C of the pole piece.
  • Holes 52 multiple rows of first adsorption holes 52 are arranged at intervals along the transmission direction B of the pole piece, a row of second adsorption holes 53 is arranged between two adjacent rows of first adsorption holes 52, and two adjacent rows of first adsorption holes
  • the row spacing of 52 may be 2 mm
  • the row spacing of two adjacent rows of second adsorption holes 53 may be 2 mm.
  • the adsorption surface 51 is flush with the first surface 331 of the first limiting portion 33 for abutting against the uncoated area 210 .
  • the arrangement of the adsorption holes can improve the stability of the adsorption, thereby effectively improving the cutting stability of the cutting of the side material.
  • the guiding mechanism 50 and the first limiting member 30 are located on the same side in the thickness direction; the second limiting member 40 includes a second rolling body 42 against which the uncoated area 210 abuts.
  • the second rolling body 42 may be a roller shaft, a ball, and the like.
  • the guide mechanism 50 and the first stopper 30 are located on the same side of the thickness direction A of the pole piece, and the uncoated area 210 may be offset by the second stopper 40 due to the vibration of the pole piece 200 in the thickness direction, and the second stopper
  • the second rolling element 42 of 40 is against the uncoated area 210, so that the uncoated area 210 forms a rolling friction contact with the second stopper 40, and the frictional damping received by the uncoated area 210 is small, which improves the transmission of the pole piece 200 stability and reduce the wear of the pole piece 200, and effectively prevent the tab from being separated from the edge material, the damping between the tab and the second limiter 40 is large, resulting in tearing of the tab, and even serious problems such as broken belts .
  • FIG. 7 is a schematic structural diagram of a second limiting member provided in some embodiments of the present application.
  • the number of the second rolling bodies 42 is multiple, the multiple second rolling bodies 42 are located downstream of the first cutting mechanism 20, and some of the multiple second rolling bodies 42 are located in the second cutting mechanism Upstream of 60 , part of the plurality of second rolling elements 42 is located downstream of the second cutting mechanism 60 .
  • parts of the plurality of second rolling elements 42 may also be located upstream of the first cutting mechanism 20 .
  • the rolling contact with the second limiting member 40 reduces the resistance of the transmission process of the pole piece 200 , improves the stability of the transmission of the pole piece 200 and reduces the wear of the pole piece 200 .
  • the second limiting member 40 further includes a second limiting portion 43 and a second connecting portion 44, the second rolling body 42 is installed on the second connecting portion 44, and the second limiting The surface of the portion 43 facing the pole piece 200 is flush with the edge of the second rolling body 42 against which the trim portion abuts.
  • the second limiting part 43 is a plate-shaped structure, the second limiting part 43 is arranged opposite to the first limiting part 33, the cutting hole of the second limiting part 40 is arranged on the second limiting part 43, and the second connecting part 44 is connected to one end of the second limiting portion 43 and is located downstream of the second limiting portion 43 , and the thickness of the second limiting portion 43 is greater than that of the second connecting portion 44 .
  • the second rolling element 42 is rotatably mounted on the second connecting portion 44 .
  • the second limiting part 43 has a second surface facing the pole piece 200, and the surface of the second rolling element 42 that is used to abut against the uncoated area 210 is the circumferential surface of the second rolling element 42, "the second limiting part 43 The surface facing the pole piece 200 is flush with the edge of the second rolling element 42 against which the uncoated region 210 abuts" can be understood as the extension surface of the second surface is tangent to the circumferential surface of the second rolling element 42 .
  • the rotation axis of the second rolling is located on the center plane of the thickness of the second limiting portion 43 , then the diameter of the second rolling element 42 is equal to the thickness of the second limiting portion 43 , and the second limiting portion 43
  • the center plane of thickness refers to a plane located at the center of the second limiting portion 43 along the thickness direction of the second limiting portion 43 and parallel to the second surface.
  • the thickness direction of the second limiting portion 43 is consistent with the thickness direction A of the pole piece, the thickness of the second limiting portion 43 refers to the size of the second limiting portion 43 in its thickness direction, and the thickness of the second connecting portion 44 refers to The dimension of the second connecting portion 44 in the thickness direction of the second limiting portion 43 .
  • the surface of the second limiting portion 43 facing the pole piece 200 is flush with the edge of the second rolling body 42 for the uncoated area 210 to abut against, then the second limiting portion 43 and the second rolling body 42 are aligned with the pole piece 200
  • the same distance allows the pole piece 200 to have the same shaking range in the thickness direction, thereby improving the stability of cutting and reducing the risk of large deformation of the pole piece 200 , so as to improve the forming quality of the pole piece 200 .
  • FIG. 8 is a schematic structural diagram of a die-cutting device 100 provided in some other embodiments of the present application.
  • the die-cutting device 100 further includes a third stopper 70.
  • the third stopper 70 is arranged on one side of the coating area 220, and the third stopper 70 is configured to The coating area 220 is limited in the offset direction of the material portion.
  • the third limiting member 70 is a plate-shaped structure, and along the width direction C of the pole piece, the third limiting member 70 and the guide mechanism 50 are arranged side by side at intervals, and the laser 300 of the second cutting mechanism 60 passes from the third limiting member 70 and The guide mechanism 50 is projected to the pole piece 200 .
  • the guide mechanism 50 Since the guide mechanism 50 is driving the side material part to deviate towards the direction close to the second cutting mechanism 60, the side material part will drive the coating area 220 to shift and cause the pole piece 200 to deform, and the third stopper 70 is on the side Limiting the coating area 220 in the offset direction of the material portion can limit the maximum deformation of the pole piece 200 and improve the molding quality of the pole piece 200 .
  • the third limiting member 70 is provided with a plurality of through holes 71 .
  • the multiple through holes 71 can be arranged in many ways, such as arranged in a rectangular array or arranged in a circular array.
  • the arrangement of the through hole 71 makes it difficult for dust to accumulate on the third limiting member 70 , and the arrangement of the through hole 71 can also reduce the weight of the third limiting member 70 .
  • the die-cutting device 100 further includes a dust removal mechanism 80 (shown in FIG. 5 ), and the dust removal mechanism 80 is configured to remove dust generated on the pole piece 200 when the second cutting mechanism 60 cuts the edge part of the pole piece 200. Dust generated on 200.
  • a dust removal mechanism 80 may also be provided correspondingly at the cutting position of the first cutting mechanism 20, so as to remove the dust generated on the pole piece 200 when the first cutting mechanism 20 cuts the pole piece 200. Since the first cutting mechanism 20 produces less dust during cutting, the dust removal mechanism 80 corresponding to the first cutting mechanism 20 can be arranged on one side or both sides of the width direction of the pole piece 200, and dust can be removed by negative pressure. The mechanism 80 adsorbs dust on one side in the width direction C of the pole piece.
  • the dust removal mechanism 80 can be a negative pressure dust removal mechanism 80.
  • the A convective negative pressure dust removal mechanism 80 is designed before and after the cutting point of the sheet 200 to improve the dust removal efficiency without affecting the cutting stability.
  • the dust removal mechanism 80 may also be a dust removal mechanism 80 in other forms.
  • the dust removal mechanism 80 is used to remove the second cutting mechanism 60.
  • the dust generated on the pole piece 200 when the edge material portion of the piece 200 is cut keeps a clean cutting environment and prevents the dust from affecting the cutting operation of the second cutting mechanism 60, which is beneficial to improving the forming quality of the pole piece 200.
  • the die-cutting device 100 further includes a scrap collecting mechanism 90, the scrap collecting mechanism 90 is arranged downstream of the second cutting mechanism 60, and the scrap collecting mechanism 90 is used to collect scraps detached from the coating area 220. material department.
  • the embodiment of the present application provides a die-cutting device 100 , the die-cutting device 100 includes a conveying mechanism 10 , a first cutting mechanism 20 , a first limiting member 30 , a second limiting member 40 , and a guiding mechanism 50 , the second cutting mechanism 60 , the third limiting member 70 , two dust removal mechanisms 80 and the scrap collection mechanism 90 .
  • the first limiting member 30 and the second limiting member 40 are relatively arranged on both sides of the thickness direction A of the pole piece.
  • the first limiting member 30 is provided with a V-shaped first cutting hole 31 along the thickness of the pole piece.
  • Direction A the first cutting mechanism 20 is arranged on the side of the first limiting member 30 away from the pole piece 200, the first cutting mechanism 20 is a laser 300 cutting mechanism, and the laser 300 emitted by the first cutting mechanism 20 passes through
  • the first cutting hole 31 cuts the uncoated area 210 of the pole piece 200, so that the uncoated area 210 forms an edge part connected with the coated area 220 and connected with the coated area 220 and connected with the edge part. Very far away.
  • the first limiting part 30 includes a first limiting part 33, a first connecting part 34 and a plurality of first rolling elements 32, and the first connecting part 34 is connected to the first limiting part 33 and is located at the first limiting part. Downstream of 33 , the first rolling element 32 is rotatably connected to the first connecting portion 34 .
  • the second cutting mechanism 60 and the guiding mechanism 50 are located downstream of the first cutting mechanism 20, and the second cutting mechanism 60, the guiding mechanism 50, the third stopper 70 and the first cutting mechanism 20 are located at the thickness of the pole piece. On the same side as direction A.
  • the second cutting mechanism 60 is used for cutting the edge material to separate the edge material from the coating area 220 .
  • the second cutting mechanism 60 is a laser 300 cutting mechanism, and the guiding mechanism 50 is an adsorption mechanism.
  • the second limiting part 40 includes a second limiting part 43 , a second connecting part 44 and a plurality of second rolling elements 42 , the second connecting part 44 is connected to the second limiting part 43 and is located at the edge of the second limiting part 43 Downstream, the second rolling body 42 is rotatably connected to the second connecting portion 44 , part of the second rolling body 42 is located downstream of the second cutting mechanism 60 , and part of the second rolling body 42 is located upstream of the second cutting mechanism 60 .
  • the third limiting member 70 is provided with a plurality of through holes 71 , and the third limiting member 70 is used to limit the coating area 220 in the offset direction of the trim portion.
  • the two dust removal mechanisms 80 are respectively arranged on both sides of the thickness direction A of the pole piece to form convective dust suction, so as to remove the dust produced on the pole piece 200 when the second cutting mechanism 60 cuts the edge material of the pole piece 200. dust.
  • the scrap collection mechanism 90 is disposed downstream of the second cutting mechanism 60 to collect scraps separated from the coating area 220 .

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Abstract

一种模切装置（100），包括输送机构（10）、第一裁切机构（20）、第一限位件（30）和第二限位件（40）。输送机构（10）用于输送极片（200）。第一裁切机构（20）位于极片（200）的厚度方向上的一侧，第一裁切机构（20）用于裁切未涂布区（210）。第一限位件（30）设有第一裁切孔（31），第一裁切孔（31）与激光（300）的裁切轨迹相适配；第二限位件（40）在厚度方向上位于极片（200）背离第一限位件（30）的一侧，第二限位件（40）和第一限位件（30）被配置为在厚度方向上配合限制极片（200）。

Description

模切装置
相关申请的交叉引用
本申请本申请要求享有于2021年09月30日提交的名称为“模切装置”的中国专利申请202122410066.6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，涉及一种模切装置。
背景技术
目前，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模切装置，以提高极片的成型质量。
第一方面，本申请实施例提供一种模切装置，包括输送机构、第一裁切机构、第一限位件和第二限位件；所述输送机构用于输送极片，所述极片包括未涂布区和涂布区，所述未涂布区连接于所述涂布区；所述第一裁切机构位于所述极片的厚度方向上的一侧，所述第一裁切机构用于裁切所述未涂布区，以使所述未涂布区形成与所述涂布区相连的边料部和与所述涂布区相连且与所述边料部分离的极耳；所述第一限位件在所述厚度方向上位于所述极片与所述第一裁切机构之间，所述第一限位件设有供所述第一裁切机构发出的激光通过的裁切孔，所述裁切孔与所述激光的裁切轨迹相适配；所述第二限位件在所述厚度方向上位于所述极片背离所述第一限位件的一侧，所述第二限位件和所述第一限位件被配置为在所述厚度方向上配合限制所述极片。
上述技术方案中，在对极片进行裁切以形成极耳的过程中，输送机构的输送力和裁切机构的裁切力均可能导致极片在厚度方向上抖动，使得裁切不稳定，影响极耳裁切质量，在极片抖动幅度过大的情况下还可能导致极片脱离裁切机构的裁切范围，导致裁切不到位或者不能实现裁切，通过在极片的两侧分别设置第一限位件和第二限位件，第一限位件和第二限位件分别在极片的厚度方向的两侧限制极片，从而配合限制极片在厚度方向上的抖动范围，提高裁切的稳定性，从而提高极片成型质量。第一限位件在极片的厚度方向上位于极片与第一裁切机构之间，裁切孔的设置能够使得第一裁切机构发出的激光通过，以实现对极片进行裁切，避免激光裁切第一限位件。
在本申请第一方面的一些实施例中，在所述厚度方向上，所述第一限位件与所述第二限位件至少部分重叠并形成重叠区，所述第一裁切机构用于在所述重叠区裁切所述未涂布区。
上述技术方案中，第一裁切机构在第一限位件和第二限位件形成的重叠区裁切未涂布区，因此，在第一裁切机构的裁切区域对应的极片在厚度方向的两侧均被限制，能够限制极片在厚度方向的抖动范围，并能够将极片在极片的厚度方向上的抖动程度限制在第一裁切机构的裁切范围内，能够提高裁切稳定性，能够提高裁切稳定性。
在本申请第一方面的一些实施例中，所述第一限位件包括供所述未涂布区抵靠的第一滚动体。
上述技术方案中，极片在厚度方向抖动可能使得极片的未涂布区与第一限位件相抵，第一限位件的第一滚动体与未涂布区相抵，使得未涂布区与第一限位件形成滚动摩擦接触，未涂布区受到的摩擦阻尼较小，提高极片传动的稳定性和减小极片的磨损，有效防止极耳与边料部分离后，极耳与第一限位件之间阻尼较大导致极耳撕裂，甚至造成断带等严重问题。
在本申请第一方面的一些实施例中，所述第一滚动体设置于所述第一裁切机构的下游。
上述技术方案中，由于边料部与极耳分离后，边料部和极耳之间没有相互制约，极耳和边料部与第一限位件接触均容易与第一限位件卡死，因此，第一滚动体设置于第一裁切机构的下游，分离后的极耳和边料部均可以与第一限位件形成滚动配合，降低极耳和边料部与第一限位件卡死导致极耳撕裂和断带的风险。
在本申请第一方面的一些实施例中，所述第一限位件还包括第一限位部和第一连接部，所述第一滚动体安装于所述第一连接部，所述第一限位部面向所述极片的表面与所述第一滚动体供所述未涂布区抵靠的边缘平齐。
上述技术方案中，第一限位部面向极片的表面与第一滚动体的供未涂布区抵靠的边缘平齐，则第一限位部和第一滚动体与极片的距离相同，允许极片在厚度方向的抖动范围相同，从而提高裁切的稳定性和降低极片发生较大形变的风险，以提高极片成型质量。
在本申请第一方面的一些实施例中，所述模切装置还包括：第二裁切机构和引导机构；所述第二裁切机构沿所述厚度方向设置于所述极片的一侧，所述第二裁切机构设置于所述第一裁切机构的下游，所述第二裁切机构用于裁切所述边料部，以将所述边料部与所述涂布区分离；所述引导机构设置于所述第一限位件的下游，所述引导机构被配置为驱动所述边料部沿靠近所述第二裁切机构的方向偏移。
上述技术方案中，第一裁切机构和第二裁切机构使得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很小，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涂布区分离，完成极片裁切，引导机构驱动边料部沿靠近第二裁切机构的方向偏移，以补偿在第一裁切机构裁切过程中导致的极片的形变量，以使边料部偏移至第二裁切机构的裁切范围内，保证第二裁切机构能够对极片进行有效裁切。
在本申请第一方面的一些实施例中，所述引导机构为吸附机构，所述引导机构和所述第二裁切机构位于所述厚度方向的同侧。
上述技术方案中，引导机构为吸附机构，通过吸附的方式驱动使未涂布区向靠近第二裁切机构的方向偏移，能够更加准确地控制边料部的偏移量。
在本申请第一方面的一些实施例中，所述吸附机构包括设有多个吸附孔的吸附面。
上述技术方案中，吸附孔的设置使得能够提高吸附的稳定性，从而有效提高边料部裁切的裁切稳定性。
在本申请第一方面的一些实施例中，所述引导机构与所述第一限位件位于所述厚度方向的同侧；所述第二限位件包括供所述未涂布区抵靠的第二滚动体。
上述技术方案中，引导机构与第一限位件位于极片的厚度方向的同侧，未涂布区因极片在厚度方向的抖动可能与第二限位件相抵，第二限位件的第二滚动体与未涂布区相抵，使得未涂布区与第二限位件形成滚动摩擦接触，未涂布区受到的摩擦阻尼较小，提高极片传动的稳定性和减小极片的磨损，有效防止极耳与边料部分离后，极耳与第二限位件之间阻尼较大导致极耳撕裂，甚至造成断带等严重问题。
在本申请第一方面的一些实施例中，所述第二滚动体的数量为多个，多个所述第二滚动体位于所述第一裁切机构的下游，多个所述第二滚动体中的部分位于所述第二裁切机构的上游，多个所述第二滚动体中的部分位于所述第二裁切机构的下游。
上述技术方案中，通过将部分第二滚动体设置于第二裁切机构的上游，部分第二滚动体设置于第二裁切机构的下游，则在边料部与涂布区分离前后均能够与第二限位件滚动接触，减小极片传动过程的阻力，提高极片传动的稳定性和减小极片磨损。
在本申请第一方面的一些实施例中，所述第二限位件还包括第二限位部和第二连接部，所述第二滚动体安装于所述第二连接部，所述第二限位部面向所述极片的表面与所述第二滚动体供所 述边料部抵靠的边缘平齐。
上述技术方案中，第二限位部面向极片的表面与第二滚动体的供未涂布区抵靠的边缘平齐，则第二限位部和第二滚动体与极片的距离相同，允许极片在厚度方向的抖动范围相同，从而提高裁切的稳定性和降低极片发生较大形变的风险，以提高极片成型质量。
在本申请第一方面的一些实施例中，所述模切装置还包括第三限位件，沿所述厚度方向，所述第三限位件设置于所述涂布区的一侧，所述第三限位件被配置为在所述边料部的偏移方向上限制所述涂布区。
上述技术方案中，由于引导机构在驱动边料部向靠近第二裁切机构的方向偏移的过程中，边料部会带动涂布区偏移而导致极片变形，第三限位件在边料部的偏移方向上限制涂布区，能够限制极片的最大变形量，提高极片的成型质量。
在本申请第一方面的一些实施例中，所述第三限位件上设有多个通孔。
上述技术方案中，第三限位件上设置多个通孔，使得粉尘不容易在第三限位件上堆积，且通孔的设置还能减轻第三限位件的重量。
在本申请第一方面的一些实施例中，所述模切装置还包括：除尘机构，被配置为清除所述第二裁切机构对所述极片进行边料部裁切时在所述极片上产生的粉尘。
上述技术方案中，一般将边料部与涂布区分离的过程中，会裁切部分涂布区的涂层，裁切涂层会产生大量粉尘，除尘机构用于清除第二裁切机构对极片进行边料部裁切时在极片上产生的粉尘，保持清洁的裁切环境，避免粉尘对第二裁切机构的裁切作业造成影响，有利于提高极片成型质量。
在本申请第一方面的一些实施例中，所述输送机构包括第一传动辊和第二传动辊，所述第一传动辊和所述第二传动辊配合传送所述极片，沿所述极片的输送方向，所述第一限位件和所述第二限位件均位于所述第一传动辊和所述第二传动辊之间。
上述技术方案中，第一传动辊和第二传动辊配合输送极片，能够提高输送稳定性，从而提高裁切稳定性和极片成型质量。
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为本申请一些实施例提供的模切装置的结构示意图；
图2为本申请一些实施例提供的第一限位件的第一视角结构示意图；
图3为本申请一些实施例提供的第一限位件的第二视角结构示意图；
图4为本申请一些实施例提供的第一限位件的第三视角结构示意图；
图5为本申请另一些实施例提供的模切装置的结构示意图；
图6为设有吸附孔的吸附机构的结构示意图；
图7为本申请实施例提供的第二限位件的结构示意图；
图8为本申请又一些实施例提供的模切装置的结构示意图。
图标：100-模切装置；10-输送机构；11-第一传动辊；12-第二传动辊；20-第一裁切机构；30-第一限位件；31-第一裁切孔；32-第一滚动体；33-第一限位部；331-第一表面；34-第一连接部；40-第二限位件；41-第二裁切孔；42-第二滚动体；43-第二限位部；44-第二连接部；50-引导 机构；51-吸附面；52-第一吸附孔；53-第二吸附孔；60-第二裁切机构；70-第三限位件；71-通孔；80-除尘机构；90-边料收集机构；200-极片；210-未涂布区；220-涂布区；300-激光；A-极片的厚度方向；B-极片的传输方向；C-极片的宽度方向。
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。
目前，从市场形势的发展来看，动力电池的应用越加广泛。动力电池不仅被应用于水力、火力、风力和太阳能电站等储能电源系统，而且还被广泛应用于电动自行车、电动摩托车、电动汽车等电动交通工具，以及军事装备和航空航天等多个领域。随着动力电池应用领域的不断扩大，其市场的需求量也在不断地扩增。
电池的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。
无论是正极片还是负极片均包括涂布区和未涂布区，沿极片的宽度方向，未涂布区与涂布区相连并凸出于涂布区。对正极片来说，涂布区涂布了正极活性物质层，正极活性物质可以为钴酸锂、磷酸铁锂、三元锂或锰酸锂等，对负极片来说，涂布区涂布了负极活性物质层，负极活性物质可以为碳或硅等。极片的极耳成型于未涂布区。在另一些实施例中，为了保证极耳的结构强度，极耳靠近涂布区的部分也可以涂覆一定的活性物质层。
发明人发现，无论是正极片还是负极片，现有技术对未涂布区裁切形成极耳的过程中，极片的输送机构的输送力和裁切机构的裁切力均使得极片在其厚度方向上抖动较大，使得裁切的稳定性较差，在极片抖动幅度过大的情况下还可能导致极片脱离裁切机构的裁切范围，导致裁切不到位或者不能实现裁切，严重影响极片成型质量。
基于上述考虑，为了解决极片裁切形成极耳的过程中因极片的抖动导致极片成型质量差的问题，发明人经过深入研究，设计了一种模切装置，通过在极片的两侧分别设置具有供激光穿过的裁切孔的第一限位件和第二限位件，第一限位件和第二限位件分别在极片的厚度方向的两侧限制极片，从而配合限制极片在厚度方向上的抖动范围，提高裁切的稳定性，从而提高极片成型质量。第一限位件在极片的厚度方向上位于极片与第一裁切机构之间，裁切孔的设置能够使得第一裁切机构发出的激光通过，以实现对极片进行裁切，避免激光裁切第一限位件。
请参照图1，图1为本申请一些实施例提供的模切装置100的结构示意图。模切装置100包括输送机构10、第一裁切机构20、第一限位件30和第二限位件40；输送机构10用于输送极片200，极片200包括未涂布区210(图8中示出)和涂布区220(图8中示出)，未涂布区210连接于涂布区220；第一裁切机构20位于极片的厚度方向A上的一侧，第一裁切机构20用于裁切未涂 布区210，以使未涂布区210形成与涂布区220相连的边料部(图中未示出)和与涂布区220相连且与边料部分离的极耳(图中未示出)；第一限位件30在厚度方向上位于极片200与第一裁切机构20之间，第一限位件30设有供第一裁切机构20发出的激光300通过的裁切孔(图2中示出，定义为第一裁切孔31)，裁切孔与激光300的裁切轨迹相适配；第二限位件40在厚度方向上位于极片200背离第一限位件30的一侧，第二限位件40和第一限位件30被配置为在厚度方向上配合限制极片200。
在一些实施例中，输送机构10包括第一传动辊11和第二传动辊12，第一传动辊11和第二传动辊12配合传送极片200，沿极片200的传输方向B，第一限位件30和第二限位件40均位于第一传动辊11和第二传动辊12之间。输送机构10以一定的速度向第一裁切机构20输送极片200，第一裁切机向极片200发出激光300以裁切未涂布区210。
第一传动辊11和第二传动辊12配合输送极片200，能够提高输送稳定性，从而提高裁切稳定性和极片200成型质量。
第一裁切机构20位于极片的厚度方向A的一侧，沿极片的厚度方向A，第一限位件30位于极片200和第一裁切机构20之间，第一裁切机构20触发出的激光300穿过第一限位件30上的裁切孔后作用于极片200，并对极片200的未涂布区210进行裁切。第一裁切机构20为激光300裁切机构，输送机构10以一定的速度向第一裁切机构20输送极片200，第一裁切机向极片200发出激光300以裁切未涂布区210。
裁切孔(第一裁切孔31)与激光300(第一裁切机构20发出的激光)的裁切轨迹相适配，可以理解为，裁切孔的形状与第一裁切机构20发出的激光300的移动轨迹相同，也可以理解为，第一裁切机构20发出的激光300能够在裁切孔内移动，以实现极片200裁切而不会切割第一限位件30，裁切孔的形状可以有多种，比如，裁切孔为矩形、字形、圆形等，只要能够使得第一限位件30避让第一裁切机构20发出的激光300即可。
在一些实施例中，第二限位件40上也可以设置裁切孔，沿极片的厚度方向A，第一限位件30向的裁切孔和第二限位件40的裁切孔相对布置，第二限位件40上的裁切孔也供第一裁切机构20的激光300穿过，避免穿过极片200的激光300切割第二限位件40。设置于第二限位件40上的裁切孔的形状和大小可以参照设置于第一限位件30的裁切孔的形状和大小。为了在方便在图中示出，定义第一限位件30上的裁切孔为第一裁切孔31，第二限位件40上的裁切孔为第二裁切孔41(图7中示出)。
在对极片200进行裁切以形成极耳的过程中，输送机构10的输送力和裁切机构的裁切力均可能导致极片200在厚度方向上抖动，使得裁切不稳定，影响极耳裁切质量，在极片200抖动幅度过大的情况下还可能导致极片200脱离裁切机构的裁切范围，导致裁切不到位或者不能实现裁切，通过在极片200的两侧分别设置第一限位件30和第二限位件40，第一限位件30和第二限位件40分别在极片的厚度方向A的两侧限制极片200，从而配合限制极片200在厚度方向上的抖动范围，提高裁切的稳定性，从而提高极片200成型质量。第一限位件30在极片的厚度方向A上位于极片200与第一裁切机构20之间，裁切孔的设置能够使得第一裁切机构20发出的激光300通过，以实现对极片200进行裁切，避免激光300裁切第一限位件30。
请继续参照图1，在一些实施例中，在厚度方向上，第一限位件30与第二限位件40至少部分重叠并形成重叠区，第一裁切机构20用于在重叠区裁切未涂布区210。
这里所述的厚度方向是指极片的厚度方向A。第一限位件30与第二限位件40至少部分重叠并形成重叠区，实际上是指沿极片的厚度方向A，第一限位件30和第二限位件40在极片200上的投影至少部分重合，可以是在极片的传输方向B上，第一限位件30的两端和第二限位件40的两端平齐；也可以是在极片的传输方向B上，第一限位件30的一端和第二限位件40的一端平齐，第二限位件40的另一端沿极片的传输方向B超出第一限位件30的另一端(如图1所示的第一限位件30和第二限位件40的相对关系)；在极片的传输方向B上，第一限位件30的一端沿极片的传输方向B的反方向超出第二限位件40的一端，第二限位件40的另一端沿极片的传输方向B超出第二限位件40的另一端。沿极片的宽度方向C，第一限位件30和第二限位件40均覆盖未涂布区210的至少部分。
第一裁切机构20发出的激光300投射在重叠区。第一裁切机构20在第一限位件30和第二限位件40形成的重叠区裁切未涂布区210，因此，在第一裁切机构20的裁切区域对应的极片200在其厚度方向的两侧均被限制，能够限制极片200在极片的厚度方向A的抖动范围，并能够将极片200在极片的厚度方向A上的抖动程度限制在第一裁切机构20的裁切范围内，能够提高裁切稳定性。
在一些实施例中，第一限位件30包括供未涂布区210抵靠的第一滚动体32。
第一滚动体32的结构形式有很多，比如，第一滚动体32的可以是辊轴、滚珠等。
极片200在厚度方向抖动可能使得极片200的未涂布区210与第一限位件30相抵，第一限位件30的第一滚动体32与未涂布区210相抵，使得未涂布区210与第一限位件30形成滚动摩擦接触，未涂布区210受到的摩擦阻尼较小，提高极片200传动的稳定性和减小极片200的磨损，有效防止极耳与边料部分离后，极耳与第一限位件30之间阻尼较大导致极耳撕裂，甚至造成断带等严重问题。
在一些实施例中，第一滚动体32设置于第一裁切机构20的下游。
需要说明的是，本申请实施例中上文、下文中所提及的“上游”以及“下游”指的是生产顺序的先后，上游是指生产顺序在先，下游是指生产顺序在后，并非限定各部件之间的空间位置。
第一滚动体32可以是一个或者多个(两个及两个以上)，在第一滚动体32为多个的实施例中，可以是多个第一滚动体32中的部分第一滚动体32位于第一裁切机构20的上游，另一部分第一滚动体32位于第一裁切机构20的下游。若第一滚动体32为多个，多个第一滚动体32也可以全部位于第一裁切机构20的下游，如图1所示，第一滚动体32为辊轴，辊轴的数量为多个，多个辊轴沿极片200的输送方向并排平行间隔布置。
由于边料部与极耳分离后，边料部和极耳之间没有相互制约，极耳和边料部与第一限位件30接触均容易与第一限位件30卡死，因此，第一滚动体32设置于第一裁切机构20的下游，分离后的极耳和边料部均可以与第一限位件30形成滚动配合，降低极耳和边料部与第一限位件30卡死导致极耳撕裂和断带的风险。
请结合参照图1、图2、图3、图4，图2为本申请一些实施例提供的第一限位件30的第一视角结构示意图，图3为本申请一些实施例提供的第一限位件30的第二视角结构示意图，图4为本申请一些实施例提供的第一限位件30的第三视角结构示意图。在一些实施例中，第一限位件30还包括第一限位部33和第一连接部34，第一滚动体32安装于第一连接部34，第一限位部33面向极片200的表面与第一滚动体32供未涂布区210抵靠的边缘平齐。
第一限位部33为板状结构，第一限位件30的裁切孔设置于第一限位部33，第一连接部34连接于第一限位部33的一端并位于第一限位部33的下游，第一限位部33的厚度大于第一连接部34的厚度。第一滚动体32可转动地安装于第一连接部34。第一滚动体32可以采用采用磁力轮驱动。
第一限位部33具有面向极片200的第一表面331，第一滚动体32用于与未涂布区210抵靠的表面即为第一滚动体32的圆周面，“第一限位部33面向极片200的表面与第一滚动体32供未涂布区210抵靠的边缘平齐”可以理解为第一表面331的延伸面与第一滚动体32的圆周面相切。在一些实施例中，第一滚动体32的转动轴线位于第一限位部33的厚度中心面上，则第一滚动体32的直径与第一限位部33的厚度相等，第一限位部33的厚度中心面是指沿第一限位部33的厚度方向位于第一限位部33的中心且与第一表面331平行的面。第一限位部33的厚度方向与极片的厚度方向A一致，第一限位部33的厚度是指第一限位部33在其厚度方向的尺寸，第一连接部34的厚度是指第一连接部34在第一限位部33的厚度方向的尺寸。
第一限位部33面向极片200的表面与第一滚动体32的供未涂布区210抵靠的边缘平齐，则第一限位部33和第一滚动体32与极片200的距离相同，允许极片200在厚度方向的抖动范围相同，从而提高裁切的稳定性和降低极片200发生较大形变的风险，以提高极片200成型质量。
请结合参照图5，图5为本申请另一些实施例提供的模切装置100的结构示意图。在一些 实施例中，模切装置100还包括第二裁切机构60和引导机构50；第二裁切机构60沿厚度方向设置于极片200的一侧，第二裁切机构60设置于第一裁切机构20的下游，第二裁切机构60用于裁切边料部，以将边料部与涂布区220分离；引导机构50设置于第一限位件30的下游，引导机构50被配置为驱动边料部沿靠近第二裁切机构60的方向偏移。
第二裁切机构60为激光300裁切机构，在极片的宽度方向C上，第二裁切机构60发出的激光300投射于吸附机构的一侧，避免第二裁切机构60的激光300切割吸附机构。
第一裁切机构20和第二裁切机构60使得极片200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很小，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200成型质量。
如图5所示，第一裁切机构20和第二裁切机构60位于极片的厚度方向A的同侧。在其他实施例中，第一裁切机构20和第二裁切机构60也可以分别位于极片的厚度方向A的相对的两侧。
边料部与极耳分离后，再进行边料部裁切以使边料部与涂布区220分离，完成极片200裁切，引导机构50驱动边料部沿靠近第二裁切机构60的方向偏移，以补偿在第一裁切机构20裁切过程中导致的极片200的形变量，以使边料部偏移至第二裁切机构60的裁切范围内，对激光300裁切机构来说，裁切范围即激光300能够到达的范围，保证第二裁切机构60能够对极片200进行有效裁切。
在一些实施例中，引导机构50为吸附机构，引导机构50和第二裁切机构60位于厚度方向的同侧。
这里所述的厚度方向是指极片的厚度方向A，引导机构50和第二裁切机构60位于厚度方向的同侧。吸附机构可以是负压机构。在其他实施例中，引导机构50和第二裁切机构60可以分别位于极片的厚度方向A的两侧，引导机构50可以为吹风机构，吹风机构用于向靠近第二裁切机构60的方向对边料部进行吹风，以使边料部向靠近第二裁切机构60的方向偏移。
吸附机构通过吸附的方式驱动使未涂布区210向靠近第二裁切机构60的方向偏移，能够更加准确地控制边料部的偏移量。
请参照图6，图6为设有吸附孔的吸附机构的结构示意图，在一些实施例中，吸附机构包括设有多个吸附孔的吸附面51。
吸附机构可以包括吸附皮带，吸附面51为吸附皮带的表面。吸附孔的孔径可以为3mm。吸附面51上包括呈多排布置的第一吸附孔52和至少一排的第二吸附孔53，每排第一吸附孔52包括沿极片的宽度方向C间隔布置的至少两个第一吸附孔52，多排第一吸附孔52沿极片的传输方向B间隔布置，相邻的两排第一吸附孔52之间设置一排第二吸附孔53，相邻的两排第一吸附孔52的排间距的可以为2mm，相邻的两排第二吸附孔53的排间距的可以为2mm。在一些实施例中，吸附面51与第一限位部33的用于与未涂布区210相抵的第一表面331平齐。
同一排第一吸附孔52中，相邻的两个第一吸附孔52的中心到与之距离最近的第二吸附孔53的中心的距离相等，即图6中，L1＝L2，这样吸附孔采用的是错位布局，在边料部未完全脱离前一排吸附孔的管控时，后一排吸附孔已经起作用，保证边料部脱离涂布区220始终被管控，抑制边料部的抖动影响切割稳定性。
因此，吸附孔的设置使得能够提高吸附的稳定性，从而有效提高边料部裁切的裁切稳定性。
在一些实施例中，引导机构50与第一限位件30位于厚度方向的同侧；第二限位件40包括供未涂布区210抵靠的第二滚动体42。
第二滚动体42的结构形式有很多，比如，第二滚动体42的可以是辊轴、滚珠等。
引导机构50与第一限位件30位于极片的厚度方向A的同侧，未涂布区210因极片200在厚度方向的抖动可能与第二限位件40相抵，第二限位件40的第二滚动体42与未涂布区210相抵，使得未涂布区210与第二限位件40形成滚动摩擦接触，未涂布区210受到的摩擦阻尼较小， 提高极片200传动的稳定性和减小极片200的磨损，有效防止极耳与边料部分离后，极耳与第二限位件40之间阻尼较大导致极耳撕裂，甚至造成断带等严重问题。
请参照图7，图7为本申请一些实施例提供的第二限位件的结构示意图。在一些实施例中，第二滚动体42的数量为多个，多个第二滚动体42位于第一裁切机构20的下游，多个第二滚动体42中的部分位于第二裁切机构60的上游，多个第二滚动体42中的部分位于第二裁切机构60的下游。
在其他实施例中，多个第二滚动体42的部分还可以位于第一裁切机构20的上游。
通过将部分第二滚动体42设置于第二裁切机构60的上游，部分第二滚动体42设置于第二裁切机构60的下游，则在边料部与涂布区220分离前后均能够与第二限位件40滚动接触，减小极片200传动过程的阻力，提高极片200传动的稳定性和减小极片200磨损。
请继续参见图7，在一些实施例中，第二限位件40还包括第二限位部43和第二连接部44，第二滚动体42安装于第二连接部44，第二限位部43面向极片200的表面与第二滚动体42供边料部抵靠的边缘平齐。
第二限位部43为板状结构，第二限位部43与第一限位部33相对布置，第二限位件40的裁切孔设置于第二限位部43，第二连接部44连接于第二限位部43的一端并位于第二限位部43的下游，第二限位部43的厚度大于第二连接部44的厚度。第二滚动体42可转动地安装于第二连接部44。第二限位部43具有面向极片200的第二表面，第二滚动体42用于与未涂布区210抵靠的表面即为第二滚动体42的圆周面，“第二限位部43面向极片200的表面与第二滚动体42供未涂布区210抵靠的边缘平齐”可以理解为第二表面的延伸面与第二滚动体42的圆周面相切。在一些实施例中，第二滚动的转动轴线位于第二限位部43的厚度中心面上，则第二滚动体42的直径与第二限位部43的厚度相等，第二限位部43的厚度中心面是指沿第二限位部43的厚度方向位于第二限位部43的中心且与第二表面平行的面。第二限位部43的厚度方向与极片的厚度方向A一致，第二限位部43的厚度是指第二限位部43在其厚度方向的尺寸，第二连接部44的厚度是指第二连接部44在第二限位部43的厚度方向的尺寸。
第二限位部43面向极片200的表面与第二滚动体42的供未涂布区210抵靠的边缘平齐，则第二限位部43和第二滚动体42与极片200的距离相同，允许极片200在厚度方向的抖动范围相同，从而提高裁切的稳定性和降低极片200发生较大形变的风险，以提高极片200成型质量。
请参照图8，图8为本申请又一些实施例提供的模切装置100的结构示意图。在一些实施例中，模切装置100还包括第三限位件70，沿厚度方向，第三限位件70设置于涂布区220的一侧，第三限位件70被配置为在边料部的偏移方向上限制涂布区220。
第三限位件70为板状结构，沿极片的宽度方向C，第三限位件70和引导机构50并排间隔布置，第二裁切机构60的激光300从第三限位件70和引导机构50之间投射至极片200。
由于引导机构50在驱动边料部向靠近第二裁切机构60的方向偏移的过程中，边料部会带动涂布区220偏移而导致极片200变形，第三限位件70在边料部的偏移方向上限制涂布区220，能够限制极片200的最大变形量，提高极片200的成型质量。
在一些实施例中，第三限位件70上设有多个通孔71。
多个通孔71的布置方式可以有很多，比如呈矩形阵列布置或者呈环形整列布置。
通孔71的设置使得粉尘不容易在第三限位件70上堆积，且通孔71的设置还能减轻第三限位件70的重量。
在一些实施例中，模切装置100还包括除尘机构80(图5中示出)，除尘机构80被配置为清除第二裁切机构60对极片200进行边料部裁切时在极片200上产生的粉尘。
如图5所示，除尘机构80可以为两个，两个除尘机构80分别设置于极片的厚度方向A的两侧，以便于从极片的厚度方向A的两侧对极片200除尘，提高除尘效率。在一些实施例中，也可以在第一裁切机构20的裁切位置对应设置除尘机构80，以对清除第一裁切机构20对极片200进行 极耳裁切时在极片200上产生的粉尘，由于第一裁切机构20裁切时产生的粉尘较少，第一裁切机构20对应的除尘机构80可以设置于极片200宽度方向的一侧或者两侧，可以通过负压除尘机构80在极片的宽度方向C的一侧吸附粉尘。
除尘机构80可以为负压除尘机构80，当两个负压除尘机构80分布于极片的厚度方向A的两侧时，根据切割极片200前后产生的粉尘实际的溅射的轨迹，在极片200切割点前后设计对流负压除尘机构80，提高除尘效率，且不影响切割稳定性。
负压除尘机构80的结构可以参考相关技术，在此不再赘述。当然除尘机构80也可以是以其他形式的除尘机构80。
一般将边料部与涂布区220分离的过程中，会裁切部分涂布区220的涂层，裁切涂层会产生大量粉尘，除尘机构80用于清除第二裁切机构60对极片200进行边料部裁切时在极片200上产生的粉尘，保持清洁的裁切环境，避免粉尘对第二裁切机构60的裁切作业造成影响，有利于提高极片200成型质量。
在一些实施例中，模切装置100还包括边料收集机构90，边料收集机构90设置于第二裁切机构60的下游，边料收集机构90用于收集从涂布区220脱离的边料部。
请参照图5，本申请实施例提供一种模切装置100，模切装置100包括输送机构10、第一裁切机构20、第一限位件30、第二限位件40、引导机构50、第二裁切机构60、第三限位件70、两个除尘机构80和边料收集机构90。
第一限位件30和第二限位件40相对布置于极片的厚度方向A的两侧，第一限位件30上设有V形的第一裁切孔31，沿极片的厚度方向A，第一裁切机构20设置于第一限位件30背离极片200的一侧，第一裁切机构20为激光300裁切机构，第一裁切机构20发出的激光300穿过第一裁切孔31对极片200的未涂布区210进行裁切，以使未涂布区210形成与涂布区220相连的边料部和与涂布区220相连且与边料部分离的极耳。其中，第一限位件30包括第一限位部33、第一连接部34和多个第一滚动体32，第一连接部34连接于第一限位部33并位于第一限位部33的下游，第一滚动体32转动连接于第一连接部34。
第二裁切机构60和引导机构50均位于第一裁切机构20的下游，第二裁切机构60、引导机构50、第三限位件70和第一裁切机构20位于极片的厚度方向A的同侧。第二裁切机构60用于裁切边料部，以将边料部与涂布区220分离。第二裁切机构60为激光300裁切机构，引导机构50为吸附机构。第二限位件40包括第二限位部43、第二连接部44和多个第二滚动体42，第二连接部44连接于第二限位部43并位于第二限位部43的下游，第二滚动体42转动连接于第二连接部44，部分第二滚动体42位于第二裁切机构60的下游，部分第二滚动体42位于第二裁切机构60的上游。
第三限位件70设有多个通孔71，第三限位件70用于在边料部的偏移方向上限制涂布区220。
两个除尘机构80分别设置于极片的厚度方向A的两侧，形成对流吸尘，以使清除第二裁切机构60对极片200进行边料部裁切时在极片200上产生的粉尘。
边料收集机构90设置于第二裁切机构60的下游，以收集从涂布区220脱离的边料部。
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 (15)

  1. 一种模切装置，包括：
    输送机构，用于输送极片，所述极片包括未涂布区和涂布区，所述未涂布区连接于所述涂布区；
    第一裁切机构，位于所述极片的厚度方向上的一侧，所述第一裁切机构用于裁切所述未涂布区，以使所述未涂布区形成与所述涂布区相连的边料部和与所述涂布区相连且与所述边料部分离的极耳；
    第一限位件，在所述厚度方向上位于所述极片与所述第一裁切机构之间，所述第一限位件设有供所述第一裁切机构发出的激光通过的裁切孔，所述裁切孔与所述激光的裁切轨迹相适配；以及
    第二限位件，在所述厚度方向上位于所述极片背离所述第一限位件的一侧，所述第二限位件和所述第一限位件被配置为在所述厚度方向上配合限制所述极片。
  2. 根据权利要求1所述的模切装置，其中，在所述厚度方向上，所述第一限位件与所述第二限位件至少部分重叠并形成重叠区，所述第一裁切机构用于在所述重叠区裁切所述未涂布区。
  3. 根据权利要求1或2所述的模切装置，其中，所述第一限位件包括供所述未涂布区抵靠的第一滚动体。
  4. 根据权利要求3所述的模切装置，其中，所述第一滚动体设置于所述第一裁切机构的下游。
  5. 根据权利要求3或4所述的模切装置，其中，所述第一限位件还包括第一限位部和第一连接部，所述第一滚动体安装于所述第一连接部，所述第一限位部面向所述极片的表面与所述第一滚动体供所述未涂布区抵靠的边缘平齐。
  6. 根据权利要求1-5任一项所述的模切装置，其中，所述模切装置还包括：
    第二裁切机构，沿所述厚度方向设置于所述极片的一侧，所述第二裁切机构设置于所述第一裁切机构的下游，所述第二裁切机构用于裁切所述边料部，以将所述边料部与所述涂布区分离；
    引导机构，设置于所述第一限位件的下游，所述引导机构被配置为驱动所述边料部沿靠近所述第二裁切机构的方向偏移。
  7. 根据权利要求6所述的模切装置，其中，所述引导机构为吸附机构，所述引导机构和所述第二裁切机构位于所述厚度方向的同侧。
  8. 根据权利要求7所述的模切装置，其中，所述吸附机构包括设有多个吸附孔的吸附面。
  9. 根据权利要求6-8任一项所述的模切装置，其中，所述引导机构与所述第一限位件位于所述厚度方向的同侧；
    所述第二限位件包括供所述未涂布区抵靠的第二滚动体。
  10. 根据权利要求9所述的模切装置，其中，所述第二滚动体的数量为多个，多个所述第二滚动体位于所述第一裁切机构的下游，多个所述第二滚动体中的部分位于所述第二裁切机构的上游，多个所述第二滚动体中的部分位于所述第二裁切机构的下游。
  11. 根据权利要求9或10所述的模切装置，其中，所述第二限位件还包括第二限位部和第二连接部，所述第二滚动体安装于所述第二连接部，所述第二限位部面向所述极片的表面与所述第二滚动体供所述边料部抵靠的边缘平齐。
  12. 根据权利要求6-11任一项所述的模切装置，其中，所述模切装置还包括第三限位件，沿所述厚度方向，所述第三限位件设置于所述涂布区的一侧，所述第三限位件被配置为在所述边料部的偏移方向上限制所述涂布区。
  13. 根据权利要求12所述的模切装置，其中，所述第三限位件上设有多个通孔。
  14. 根据权利要求6-13任一项所述的模切装置，其中，所述模切装置还包括：
    除尘机构，被配置为清除所述第二裁切机构对所述极片进行边料部裁切时在所述极片上产生的粉尘。
  15. 根据权利要求1-14任一项所述的模切装置，其中，所述输送机构包括第一传动辊和第二传动辊，所述第一传动辊和所述第二传动辊配合传送所述极片，沿所述极片的输送方向，所述第一限位件和所述第二限位件均位于所述第一传动辊和所述第二传动辊之间。
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