WO2021243582A1 - 制备电极组件的设备及电极组件的制备方法 - Google Patents

制备电极组件的设备及电极组件的制备方法 Download PDF

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Publication number
WO2021243582A1
WO2021243582A1 PCT/CN2020/094038 CN2020094038W WO2021243582A1 WO 2021243582 A1 WO2021243582 A1 WO 2021243582A1 CN 2020094038 W CN2020094038 W CN 2020094038W WO 2021243582 A1 WO2021243582 A1 WO 2021243582A1
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Prior art keywords
type
winding
pole piece
electrode assembly
composite
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PCT/CN2020/094038
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English (en)
French (fr)
Inventor
梁成都
王艺若
阳超
唐鸣浩
王晓
林江
项闯闯
Original Assignee
宁德时代新能源科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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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 CN202080094999.4A priority Critical patent/CN115004428B/zh
Priority to EP20803072.6A priority patent/EP3951968B1/en
Priority to KR1020217032749A priority patent/KR20230018291A/ko
Priority to US17/058,463 priority patent/US11476492B2/en
Priority to JP2022506536A priority patent/JP2023530532A/ja
Priority to PCT/CN2020/094038 priority patent/WO2021243582A1/zh
Publication of WO2021243582A1 publication Critical patent/WO2021243582A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0404—Machines for assembling batteries
    • H01M10/0409—Machines for assembling batteries for cells with wound electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0431—Cells with wound or folded electrodes
    • 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
    • H01M10/0468—Compression means for stacks of electrodes and separators
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • This application relates to the field of batteries, and in particular to a device for preparing an electrode assembly and a method for preparing the electrode assembly.
  • the preparation of a battery requires that the positive electrode sheet and the negative electrode sheet are wound to form an electrode assembly, and then placed in a battery casing to form a battery. Winding is an important part of the battery preparation process, and those skilled in the art have been committed to improving its efficiency.
  • Some embodiments of the present application propose a device for preparing an electrode assembly and a method for preparing an electrode assembly, which are used to improve the winding efficiency.
  • Some embodiments of the present application provide a device for preparing an electrode assembly, which includes:
  • a plurality of first-type pole piece unwinding devices for providing a plurality of first-type pole pieces to the winding assembly
  • At least one second-type pole piece unwinding device for providing at least one second-type pole piece to the winding assembly, and the first-type pole piece and the second-type pole piece have opposite polarities;
  • the winding assembly is used for winding the plurality of first-type pole pieces and the at least one second-type pole piece to form an electrode assembly.
  • the apparatus for preparing the electrode assembly further includes a plurality of diaphragm unwinding devices, the plurality of diaphragm unwinding devices are used to provide a plurality of diaphragms to the winding assembly, and the diaphragm is used to isolate the first One kind of pole piece and the second kind of pole piece.
  • the winding assembly includes a winding core for winding the plurality of first-type pole pieces, the at least one second-type pole piece, and the plurality of diaphragms.
  • the winding core is provided with at least one negative pressure port for absorbing the winding start section of at least one of the plurality of diaphragms.
  • the negative pressure port includes a recessed hole or a through hole provided on the winding surface of the winding core.
  • the negative pressure port is triangular, circular, quadrangular or irregular in shape.
  • the negative pressure ports are distributed in an array on the winding surface of the winding core.
  • the device for preparing the electrode assembly further includes:
  • a pressing roller for pressing the winding start section of at least one of the plurality of diaphragms to the winding core
  • the blowing mechanism is used to blow the end of the winding start section on the surface of the winding core, so that the winding core winds the winding start section to drive the plurality of pieces of the first type The pole piece, the at least one second type pole piece and the multiple diaphragms are wound.
  • the winding assembly further includes a switching device, the winding core is provided in the switching device, and the switching device is used to make the winding core between the loading station and the unloading station Switch.
  • the device for preparing the electrode assembly includes:
  • the first cutting member is used to cut at least one of the plurality of diaphragms and retain at least one diaphragm when the winding core is wound around the electrode assembly for a predetermined number of turns;
  • the second cutting part is used to cut the at least one remaining diaphragm when the core is in the cutting station.
  • the device for preparing the electrode assembly further includes a first loading member for feeding the winding start section of the at least one diaphragm into the winding core.
  • the device for preparing the electrode assembly includes a second loading member for clamping the cut at least one separator when at least one of the multiple separators is cut.
  • the device for preparing the electrode assembly includes:
  • a plurality of first compound mechanisms each of the plurality of first compound mechanisms is used to combine one of the plurality of first type pole pieces with the plurality of diaphragms A piece of diaphragm is compounded into the first compound pole piece,
  • each of the at least one second composite mechanism is used to combine one of the at least one second type of pole pieces and the multiple diaphragms The other diaphragm is compounded into the second compound pole piece,
  • the winding assembly is used for winding all the first composite pole pieces and all the second composite pole pieces to form an electrode assembly.
  • the device for preparing the electrode assembly includes at least one third composite mechanism, and each third composite mechanism in the at least one third composite mechanism is used to combine one of the plurality of first type pole pieces The first type of pole piece, one of the second type of the at least one second type of pole piece, and two of the multiple diaphragms are combined to form a third composite pole piece;
  • the winding assembly is used for winding all the third composite pole pieces to form an electrode assembly.
  • the device for preparing the electrode assembly includes a fourth compounding mechanism for compounding the plurality of first-type pole pieces, the at least one second-type pole piece, and the multiple diaphragms into a fourth compound The pole piece, and the winding assembly is used to wind the fourth composite pole piece to form the electrode assembly.
  • Some embodiments of the present application provide a method for preparing an electrode assembly, which includes:
  • the pole piece of the first type and the pole piece of the second type are opposite in polarity
  • the plurality of first-type pole pieces and the at least one second-type pole piece are wound to form an electrode assembly.
  • the preparation method of the electrode assembly further includes: providing a plurality of diaphragms, and the diaphragms are used to isolate the first type of pole piece and the second type of pole piece.
  • the winding start section of at least one of the plurality of diaphragms is adsorbed, and the plurality of first type pole pieces, the at least one second type pole piece, and the plurality of diaphragms Winding.
  • the winding start section of at least one of the multiple diaphragms is fed into the winding core of the winding assembly to be wound for a certain length, and then the remaining diaphragms of the multiple diaphragms are sent to Into the winding core and drive the remaining diaphragm to wind through the at least one diaphragm.
  • the preparation method of the electrode assembly includes:
  • Each of the plurality of first composite mechanisms combines one of the plurality of first type pole pieces and one of the multiple diaphragms into a first composite pole piece
  • Each of the at least one second composite mechanism combines one of the at least one second type of pole piece and the other of the multiple diaphragms into a second composite pole piece ,
  • the winding assembly winds all the first composite pole pieces and all the second composite pole pieces to form an electrode assembly.
  • the preparation method of the electrode assembly includes at least one third composite mechanism for each third composite mechanism to combine one of the plurality of first type pole pieces, the at least one first type pole piece, and the at least one first type pole piece.
  • One of the second type of the two types of pole pieces and two of the multiple diaphragms are combined to form a third composite pole piece;
  • the winding assembly winds all the third composite pole pieces to form an electrode assembly.
  • the preparation method of the electrode assembly includes a fourth composite mechanism that composites the plurality of first-type pole pieces, the at least one second-type pole piece, and the multiple diaphragms into a fourth composite pole piece, The winding assembly winds the fourth composite pole piece to form the electrode assembly.
  • the device for preparing the electrode assembly is wound with a plurality of first type pole pieces and at least one second type pole piece to obtain an electrode with a winding structure Component, that is, multiple pole pieces of the first type are wound on the winding component at the same time, and the length of the first pole piece obtained by winding the winding component one turn is equivalent to winding a piece of the first type pole piece roll on the winding component
  • the length of the winding is multiple, so the number of winding turns is reduced, thereby improving the winding efficiency of the electrode assembly.
  • Fig. 1 is a schematic diagram of a device for preparing an electrode assembly according to a first embodiment of the present application
  • Fig. 2 is a schematic diagram of a device for preparing an electrode assembly according to a second embodiment of the present application
  • Fig. 3 is a schematic diagram of a device for preparing an electrode assembly according to a third embodiment of the present application.
  • Fig. 4 is a schematic diagram of a device for preparing an electrode assembly according to a fourth embodiment of the present application.
  • Fig. 5 is a schematic diagram of a device for preparing an electrode assembly according to a fifth embodiment of the present application.
  • Fig. 6 is a schematic diagram of a device for preparing an electrode assembly according to a sixth embodiment of the present application.
  • Fig. 7 is a schematic diagram of a device for preparing an electrode assembly according to a seventh embodiment of the present application.
  • Fig. 8 is a schematic diagram of a device for preparing an electrode assembly according to an eighth embodiment of the present application.
  • Fig. 9 is a schematic diagram of a winding core with a negative pressure port provided according to some embodiments of the present application.
  • Figure 10 is a schematic diagram of a pressing roller and a blowing mechanism provided according to some embodiments of the present application.
  • FIG. 11 is a schematic diagram of one setting mode of the feeding assembly provided according to some embodiments of the present application.
  • Figure 12 is a schematic diagram of a feeding assembly provided according to some embodiments of the present application.
  • FIG. 13 is a schematic diagram of a device for preparing an electrode assembly having a composite mechanism according to some embodiments of the present application.
  • FIG. 14 is a schematic diagram of a device for preparing an electrode assembly with a composite mechanism according to other embodiments of the present application.
  • FIG. 15 is a schematic diagram of a device for preparing an electrode assembly with a composite mechanism according to still other embodiments of the present application.
  • FIG. 16 is a schematic diagram of a device for preparing an electrode assembly according to the first embodiment of the present application.
  • FIG. 17 is a schematic diagram of a device for preparing an electrode assembly according to a second embodiment of the present application.
  • Fig. 18 is a partial enlarged schematic diagram of Fig. 17;
  • 19 is a schematic diagram of the winding core of the device for preparing the electrode assembly provided by the second embodiment of the present application with a negative pressure port;
  • FIG. 20 is a schematic diagram of a device for preparing an electrode assembly according to a third embodiment of the present application.
  • Fig. 21 is a partial enlarged schematic diagram of Fig. 20;
  • 22 is a schematic diagram of the device for preparing an electrode assembly provided according to the second embodiment of the present application with a pressing roller and a blowing mechanism;
  • FIG. 23 is a schematic diagram of a device for preparing an electrode assembly according to a fourth embodiment of the present application.
  • Figure 24 is a schematic diagram of a device for preparing an electrode assembly according to a fifth embodiment of the present application
  • FIG. 25 is a schematic flowchart of a method for manufacturing an electrode assembly according to some embodiments of the present application.
  • Fig. 26 is a schematic diagram of an electrode assembly provided according to some embodiments of the present application.
  • FIG. 27 is a schematic diagram of electrode assemblies provided according to other embodiments of the present application.
  • FIG. 28 is a schematic diagram of electrode assemblies provided according to still other embodiments of the present application.
  • FIG. 1 there is a schematic structural diagram of a device for preparing an electrode assembly provided by some embodiments of this application.
  • the device for preparing an electrode assembly includes: a winding assembly 11, a plurality of first type pole piece unwinding devices 12, and At least one second type of pole piece unwinding device 13.
  • Each of the plurality of first-type pole piece unwinding devices 12 is used to provide the first-type pole piece to the winding assembly 11. That is, a plurality of first-type pole piece unwinding devices 12 are used to provide a plurality of first-type pole pieces to the winding assembly 11.
  • Each of the at least one second-type pole piece unwinding device 13 is used to provide the second-type pole piece to the winding assembly 11. That is, at least one second-type pole piece unwinding device 13 is used to provide at least one second-type pole piece to the winding assembly 11.
  • the pole piece of the first type has the opposite polarity to that of the second type of pole piece.
  • the winding assembly 11 is used for winding a plurality of pole pieces of the first type and at least one pole piece of the second type to form an electrode assembly.
  • Each electrode assembly includes a plurality of first-type pole pieces and at least one second-type pole piece stacked in a direction perpendicular to the winding axis of the winding structure.
  • a plurality of pole piece unwinding devices 12 of the first type and at least one pole piece unwinding device 13 of the second type are distributed around the winding assembly 11 so that the respective provided pole pieces enter the winding group No winding before piece 11.
  • the number of the multiple first type pole pieces and at least one second type pole piece included in the electrode assembly may be the same or different.
  • one electrode assembly includes 2, 3, 4 or 5 pieces of the first type pole piece and 1 , 2, 3 or 4 pieces of the second pole piece.
  • the following embodiments all take the same number of pole pieces of the first type and the same number of pole pieces of the second type as an example.
  • each of the first type of pole piece and each piece of the second type of pole piece have substantially the same shape.
  • the first type of pole piece is basically in the shape of a long strip, for example, a long strip shape of 5-20 meters long.
  • the length of the first type of pole piece and the second type of pole piece are within a predetermined range, and the width dimensions are basically the same.
  • first type pole pieces and at least one second type pole piece are superimposed, they are wound along the longitudinal direction to obtain an electrode assembly with a winding structure, the winding structure has a winding axis, and a plurality of first type pole pieces
  • the stacking surface of the sheet and at least one second type of pole sheet is substantially parallel to the winding axis.
  • the superposition of the plurality of first-type pole pieces and at least one second-type pole piece included in the electrode assembly may have various forms.
  • it may be In the form of one pole piece of the first type and one pole piece of the second type alternately superimposed in sequence, or every two or more pieces of the first type pole piece and one piece of the second type pole piece alternately stacked in sequence, and It can be alternately stacked in the form of one pole piece of the first type and every two or more pole pieces of the second type.
  • the superposition of multiple first type pole pieces and at least one second type pole piece of the electrode assembly can also be understood as including at least one second type pole piece between every two adjacent first type pole pieces, or every adjacent one At least one pole piece of the first type is included between the two pole pieces of the second type.
  • the two pole pieces of the same polarity when there are no other pole pieces of different polarity between two or more pole pieces of the same polarity, can be regarded as a set of pole pieces. When superimposed, it is a pole piece group of the same polarity and a pole piece group of different polarity or a single pole piece alternately superimposed in turn.
  • two or more positive plates form a group of positive plates.
  • Two or more negative plates form a negative plate group.
  • the stacking can be: the positive plate group and the negative plate group are alternately stacked in sequence, the positive plate group and the single negative plate are alternately stacked in sequence, or the negative plate group and the single plate The positive plates are alternately stacked in sequence.
  • pole piece group of the same polarity can be regarded as a pole piece, for the convenience of description, a pole piece described later can refer to either a single pole piece or a combination of multiple pole pieces of the same polarity. Pole piece group.
  • that two pole pieces of the same polarity are adjacent to each other means that there is only one pole piece of other polarity between the two pole pieces of the same polarity, for example, two pole pieces of the first type.
  • Adjacent pieces means that there is only one piece of the second type between the two pieces of the first type, and that two pieces of the second type are adjacent to each other means that there is only one piece of the first type between the two pieces of the second type. piece.
  • the first type of pole piece is a positive electrode with an insulating layer
  • the second type of pole piece is a negative electrode with an insulating layer.
  • the positive electrode and the negative electrode are separated by an insulating layer to prevent occurrence of Short circuit.
  • the first type of pole piece is a negative electrode with an insulating layer
  • the second type of pole piece is a positive electrode with an insulating layer.
  • the positive electrode and the negative electrode are separated by an insulating layer to prevent A short circuit occurred.
  • the first type of pole piece and the second type of pole piece may also be pole pieces without an insulating layer, and the pole pieces with opposite polarities are separated by a diaphragm to prevent short circuits.
  • the winding assembly 11 includes a winding core 112 for winding a plurality of pole pieces of the first type and at least one pole piece of the second type.
  • the winding assembly 11 includes a switching device 111, the winding core 112 is provided in the switching device 111, and the switching device 111 is used to switch the winding core 112 between the loading station and the unloading station. .
  • the winding core 112 is used for winding a plurality of first type pole pieces and at least one second type pole piece corresponding to the loading station at its corresponding loading station to form an electrode assembly with a winding structure.
  • the unloading station may refer to the station where the electrode assembly is unloaded from the winding core 112, or it may refer to the next station where other processes are to be performed after the electrode assembly is wound.
  • the other processes may be processes such as glue application.
  • winding cores 112 are provided on the switching device 111, one of the winding cores 112 is corresponding to the loading station A, and the other winding core 112 is corresponding to the unloading station B.
  • the number of winding cores 112 on the switching device 111 is not limited and can be added according to actual needs.
  • the device for preparing the electrode assembly includes at least one tension mechanism 18, and the tension mechanism 18 is used to adjust the tension of the first type of pole piece and/or the second type of pole piece.
  • the device for preparing the electrode assembly includes at least one first type of composite mechanism 101, and the first type of composite mechanism 101 is used to combine at least one first type of pole piece with at least one The second type of pole pieces are compounded to form the first type of composite pole piece, and the winding assembly 11 is used to wind all the first type of composite pole pieces.
  • the device for preparing the electrode assembly includes at least one second type of composite mechanism 102, which is used to combine all the first type of pole pieces and all of the The second type of pole piece is compounded to form a second type of composite pole piece, and the winding assembly 11 is used for winding the second type of composite pole piece.
  • the equipment for preparing the electrode assembly also includes a plurality of diaphragm unwinding devices 14, the plurality of diaphragm unwinding devices 14 are used to provide multiple diaphragms to the winding assembly 11, and the diaphragms are used to isolate the first type of pole piece and The second type of pole piece to prevent short circuits.
  • Each electrode assembly includes at least a plurality of first-type pole pieces, at least one second-type pole piece, and multiple diaphragms stacked in a direction perpendicular to the winding axis of the winding structure.
  • the two pole pieces are separated by at least one diaphragm.
  • a plurality of pole piece unwinding devices 12 of the first type, at least one pole piece unwinding device 13 of the second type, and a plurality of diaphragm unwinding devices 14 are distributed around the winding assembly 11 so that The pole pieces and diaphragms provided separately are not wound before entering the winding assembly 11.
  • a plurality of first type pole pieces, at least one second type pole piece, and a plurality of diaphragms are superimposed, they are wound along the longitudinal direction to obtain an electrode assembly with a winding structure.
  • the winding structure has a winding axis, and the superimposing surface on which a plurality of first type pole pieces, at least one second type pole piece and a plurality of diaphragms are superimposed is substantially parallel to the winding axis.
  • a diaphragm is also provided between any adjacent piece of first type pole piece and one second type pole piece for the phase
  • the adjacent first type pole piece and the second type pole piece are separated so as not to short-circuit each other.
  • the pole pieces of different polarities are adjacent, that is, the pole piece of the first type and the pole piece of the second type are adjacent, which means that the pole piece of the first type and the pole piece of the second type are adjacent to each other.
  • the pole piece of the first type or the second type of pole piece between the first type of pole piece and the second type of pole piece it can also be understood as the first type of pole piece.
  • the most directly adjacent to the second type of pole piece for example, based on one type of polar pole piece (for example, positive pole piece), the polar pole piece is adjacent to the first pole piece adjacent to the polar pole piece. Layers of pole pieces with different polarities (for example, negative pole pieces) are called adjacent pole pieces.
  • At least one diaphragm is arranged between the adjacent first type of pole piece and the second type of pole piece.
  • the winding assembly 11 includes a winding core 112 for winding a plurality of first-type pole pieces, at least one second-type pole piece, and multiple diaphragms.
  • the winding assembly 11 includes a switching device 111, the winding core 112 is provided in the switching device 111, and the switching device 111 is used to switch the winding core 112 between the loading station and the unloading station. .
  • the winding core 112 is used for winding a plurality of first type pole pieces, at least one second type pole piece, and multiple diaphragms corresponding to the loading station A at its corresponding feeding station A to form a winding structure Electrode assembly.
  • the equipment for preparing the electrode assembly includes a loading station A and an unloading station B, at least one winding core 112 is provided on the switching device 111, and the switching device 111 moves one of the at least one winding core 112.
  • the winding core 112 corresponding to the loading station A can provide multiple first type pole pieces, At least one second-type pole piece provided by at least one second-type pole piece unwinding device 13 and multiple sheets of separators provided by a plurality of diaphragm unwinding devices 14 are wound to form an electrode assembly having a winding structure.
  • the switching device 111 moves the winding core 112 with the electrode assembly to the unloading station B for unloading the electrode assembly.
  • the blanking here refers to transporting the winding core 112 with the electrode assembly to the next step.
  • the next step can be the next step in the winding process, such as gluing, or the next step after winding, such as Hot press. If the switching device 111 still has at least one winding core 112, the other winding core 112 is moved to the loading station A to continue to form another electrode assembly with a winding structure.
  • the switching device 111 is provided with two winding cores 112, and a loading station A and an unloading station B are provided at a position corresponding to the winding core 112.
  • the switching device 111 includes a turntable, and the two winding cores 112 are respectively arranged along the circumference of the switching device 111, and the two winding cores 112 are symmetrically distributed on a diameter of the switching device 111 with the rotation axis of the switching device 111.
  • the two winding cores 112 are distributed on different diameters of the switching device 111 with the center of the rotating shaft of the switching device 111, and the switching device 111 moves one of the winding cores 112 to the loading station A to perform the loading process.
  • the first type of pole piece, the second type of pole piece, and the diaphragm corresponding to position A are wound to form an electrode assembly with a winding structure.
  • the switching device 111 continues to rotate to turn the winding core 112 with the electrode assembly Move to the unloading station B to unload the electrode assembly, and move the other winding core 112 to the loading station A to form another electrode assembly having a winding structure.
  • the switching device 111 includes a turntable, and three winding cores 112 are provided on the switching device 111, and the three winding cores 112 are respectively distributed along the circumference of the switching device 111, for example, the three winding cores 112 are equiangularly distributed
  • the switching device 111 moves one of the winding cores 112 to the loading station A to perform the winding of the first type of pole piece, the second type of pole piece and the diaphragm corresponding to the loading station A
  • An electrode assembly with a winding structure is formed.
  • the switching device 111 continues to rotate to move the winding core 112 with the electrode assembly to the gluing station B', and the finishing tape can be applied. After the finishing tape is applied, it has a motor
  • the core 112 of the assembly is moved to the unloading station C to facilitate the removal of the electrode assembly.
  • the unloading station includes glue sticking station B'and unloading station C.
  • the other winding core 112 While moving the winding core 112 with the electrode assembly to the gluing station B', the other winding core 112 is moved to the loading station A to form another electrode assembly with a winding structure, and the last one The reel core 112 is at the unloading station C, and serves as a spare reel core 112 waiting for the rotation of the switching device 111 to enter the loading station A.
  • the station where the last core 112 is located can be used as an alternative station, and can also be used as the unloading station C when the core 112 has an electrode assembly. That is, the switching device 111 rotates to move the winding core 112 with the electrode assembly to the unloading station C for unloading, that is, unloading the electrode assembly. After the winding core 112 with the electrode assembly is discharged at the unloading station C, it can be Then place the empty core 112 at the unloading station C, and wait to enter the loading station A.
  • two or more loading stations A may be arranged at the position corresponding to the winding core 112, for example, as shown in FIG. 7, the position corresponding to the winding core 112 is arranged If there are two loading stations A, the switching device 111 can move the same number of cores 112 as the loading station A to the respective loading station A at the same time, and each loading station A corresponds to the core 112. Winding to form the same number of electrode assemblies with winding structure as the loading station A, each loading station A corresponds to a plurality of first type pole piece unwinding devices 12 and at least one second type pole piece release A feeding system composed of a roll device 13 and a plurality of diaphragm unwinding devices 14.
  • This embodiment does not limit the number of unloading stations B.
  • the number of unloading stations B may be one or the same as the number of loading stations A.
  • the device for preparing the electrode assembly further includes a first cut-off piece 151 and a second cut-off piece 152.
  • the first cut-off piece 151 is used as the winding core 112 to wind the electrode assembly.
  • the second cut-off member 152 is used to cut off the remaining at least when the winding core 112 is in the unloading station B (the glue can be applied at the station) A diaphragm.
  • each loading station A corresponds to a first cutting part 151 and a second cutting part 152.
  • a first cutting part 151 and a second cutting part 152 may be provided for each loading station A, and when any loading station A (for example, the first loading station) corresponds to the winding core 112
  • the first cutting member 151 corresponding to the loading station A (for example, the first loading station) is cut off on the basis of retaining at least one diaphragm Other diaphragms entering the loading station A (for example, the first loading station), for example, retain the outermost diaphragm of the winding structure of the electrode assembly, and cut off all other diaphragms.
  • the winding to a predetermined number of turns here means that the length of the first type of pole piece or the second type of pole piece wound to the winding core reaches the length required by the electrode assembly.
  • the second cut-off member 152 is used to cut off at least one of the remaining diaphragms at the loading station A (for example, the first loading station) after the reloading is successful. ) And the remaining at least one diaphragm between the blanking station B (for example, the first blanking station).
  • the switching device 111 transfers the winding core 112 corresponding to the first loading station to the first unloading station, since the electrode assembly of the winding core 112 on the first loading station still retains at least one diaphragm, use The friction between the retained diaphragm and its adjacent first type, second type or diaphragm, as well as the friction between the first type and the diaphragm and the second type and the diaphragm, retain The diaphragm can drive all the first type of pole piece, the second type of pole piece and other diaphragms to load at the loading station A.
  • the second cutting piece 152 cuts off the At least one diaphragm remains between the unloading stations so as to move into the winding core 112 of the loading station A to wind a new electrode assembly.
  • the completion of loading at the loading station here means that the other diaphragms that have been cut are completely wound to the core, and the core 112 moves to the unloading station with the switching device.
  • the remaining diaphragm is successfully reloaded. That is, the part of the remaining diaphragm located at the loading station is fixed to the winding core located at the loading station.
  • the tail end of the remaining diaphragm is longer than its corresponding first or second pole piece
  • the winding core 112 at the unloading station continues to rotate to wind the remaining diaphragm and its corresponding first or second pole piece to the outermost layer of the winding structure to form Electrode assembly.
  • the remaining at least one diaphragm includes at least one diaphragm calculated from the outermost diaphragm of the electrode assembly.
  • the diaphragm of the electrode assembly can be called from the outside to the inside in the winding structure.
  • the number of pole pieces is related to the number of diaphragms. For example, n is greater than or equal to the sum of the number of pole pieces of the first type and the second type.
  • the outermost diaphragm refers to the outermost pole piece of the winding structure (usually the second type of pole piece The diaphragm attached to the outside of the sheet), the outermost pole piece can be the outermost pole piece after the winding structure is flattened, or any one of the pole pieces in the winding structure can continue after the winding of other pole pieces is finished Winding the pole piece formed on the outermost ring of the winding structure.
  • the first type of pole piece and the second type of pole piece have an insulating layer without a diaphragm, and when multiple pieces of the first type of pole piece and at least one of the second type of pole piece are wound, the first cutting piece 151 is used to cut off at least one of a plurality of first-type pole pieces and at least one second-type pole piece and retain at least one first-type pole piece or The second type of pole piece.
  • the second cutting member 152 is used for cutting the remaining at least one pole piece of the first type or the second type when the core is in the cutting station.
  • each core 112 is provided with at least one negative pressure port 1121 for absorbing at least one of the multiple diaphragms.
  • the winding start section refers to the head of the diaphragm when the winding starts.
  • the first type of pole piece and the second type of pole piece have an insulating layer without a diaphragm, and when multiple pieces of the first type of pole piece and at least one of the second type of pole piece are wound, the winding core 112 At least one negative pressure port 1121 is provided on the winding surface of, which is used to adsorb at least one of the plurality of first type pole pieces or at least one second type pole piece.
  • the negative pressure port 1121 includes pits or through holes provided on the winding surface of the winding core 112.
  • the size and shape of the pits or through holes are not limited in this embodiment. For example, It may be a circular pit or a through hole, or it may be a triangular pit or a through hole, or it may be a square pit or a through hole.
  • the negative pressure port 1121 has a triangular, circular, quadrangular or irregular shape.
  • the negative pressure ports 1121 are arranged in an array on the winding surface of the winding core 112.
  • the array distribution of the negative pressure ports 1121 ensures the uniform absorption force of the diaphragm, and ensures the flatness of the diaphragm or the pole piece (the first type of pole piece or the second type of pole piece) when it is wound.
  • the device for preparing the electrode assembly further includes a pressing roller 161 and a blowing mechanism 162.
  • the pressing roller 161 is used to wind up at least one of the multiple diaphragms.
  • the start section is pressed against the winding core;
  • the blowing mechanism 162 is used to blow the end of the winding start section to the surface of the winding core, so that the winding core winds the winding start section to drive a plurality of first type pole pieces , At least one second pole piece and multiple diaphragms are wound.
  • Each loading station A corresponds to a pressing roller 161 and a blowing mechanism 162, and the pressing roller 161 is used to transfer at least one of the multiple diaphragms of its corresponding loading station A (for example, the first loading station)
  • the winding start section of a piece of diaphragm is pressed against the corresponding winding core 112 of the corresponding feeding station A (for example, the first feeding station), and the blowing mechanism 162 is used to press the winding start section of at least one piece of diaphragm
  • the end of, is blown and attached to the winding surface of the core 112 corresponding to the corresponding feeding station A (for example, the first feeding station) so as to correspond to the feeding station A (for example, the first feeding station)
  • the winding start section of the winding core 112 is wound to drive the corresponding feeding station A (for example, the first feeding station) corresponding to the first type of pole piece, at least one second type of pole piece and A plurality of separators are wound to form an electrode assembly
  • the first type of pole piece and the second type of pole piece have an insulating layer without a diaphragm, and multiple pieces of the first type of pole piece and at least one of the second type of pole piece are
  • the pressing roller 161 is used to press the winding start section of at least one of the plurality of first type pole pieces and at least one second type to the winding core
  • the blowing mechanism 162 is used to press the winding start section The end of the spool is blown on the surface of the winding core, so that the winding core winds the winding start section, so as to drive a plurality of first type pole pieces and at least one second type pole piece to be wound.
  • the device for preparing the electrode assembly further includes a feeding assembly 17.
  • Each loading station A can correspond to a loading assembly 17.
  • the feeding assembly 17 is used to send the winding start section of at least one diaphragm entering the feeding station A (for example, the first feeding station) corresponding to the feeding assembly 17 to the corresponding feeding station A (for example, The first loading station) corresponds to the winding surface of the core 112.
  • the loading assembly 17 is also used to clamp the end of the separator after the pole pieces in the electrode assembly are wound to a predetermined number of turns and the diaphragm is cut, and to clamp the next pre-formed electrode assembly at the loading assembly 17 The beginning of the winding of the diaphragm.
  • the feeding assembly 17 includes a first feeding assembly 171, and the first feeding assembly 171 is used to feed the winding start section of at least one diaphragm into the winding core 112.
  • the first loading member 171 is used to send the winding start section of at least one diaphragm entering the loading station A (for example, the first loading station) corresponding to the first loading assembly 171 to the corresponding loading station A (for example, the first loading station) corresponds to the winding surface of the core 112.
  • the first loading member 171 is also used to clamp the end of the diaphragm after the pole piece in the electrode assembly is wound to a predetermined number of turns and the diaphragm is cut.
  • the loading assembly 17 also includes a second loading member 172, which is used to clamp the next pre-formed electrode assembly after the pole piece in the electrode assembly is wound to a predetermined number of turns and the diaphragm is cut.
  • the first cutting member 151 is disposed between the first feeding member 171 and the second feeding member 172.
  • the feeding assembly 17 includes a first feeding assembly 17 and a second feeding part 172, and the first cutting part 151 is disposed between the first feeding part 171 and the second feeding part 172.
  • the first feeding part 171 is used to clamp the winding start section of the diaphragm of the corresponding feeding station, and the winding start section is sent to the winding core 112, and the diaphragm is cut off at the first cutting part 151
  • the first loading member 171 clamps the end of the winding of the separator, moves the end of the separator to the winding core 112, and the second loading member 172 is used to clamp the electrode assembly to be formed later.
  • the winding start section of the diaphragm is used to clamp the electrode assembly to be formed later.
  • the first type of pole piece and the second type of pole piece have an insulating layer without a diaphragm.
  • the first upper The material 171 is used to clamp the winding start section of at least one of the plurality of first type pole pieces and at least one second type pole piece, and send the winding start section into the winding core 112.
  • the second loading member 172 is used for clamping the cut at least one of the first pole pieces and at least one of the second pole pieces or the second type of pole pieces.
  • each loading assembly 17 is located below the winding core 112 corresponding to its corresponding loading station A, and is used to feed the diaphragm from bottom to top to the corresponding loading station A.
  • the feeding assembly 17 is located below the winding core 112 corresponding to the first feeding station, and the feeding assembly 17 is used to feed the diaphragm from the bottom up to the winding core 112 corresponding to the first feeding station.
  • the device for preparing the electrode assembly further includes a plurality of first composite mechanisms 181 and at least one second composite mechanism 182, each of the plurality of first composite mechanisms 181
  • the first composite mechanism 181 is used to composite one of the first type of pole pieces and one of the multiple diaphragms into a first composite pole piece.
  • Each of the at least one second composite mechanism 182 is used to composite one of the at least one second type of pole piece and the other of the multiple diaphragms into a second composite pole piece .
  • the winding assembly 11 is used for winding all the first composite pole pieces and all the second composite pole pieces to form an electrode assembly with a winding structure.
  • the device for preparing the electrode assembly further includes at least one third composite mechanism 183, and each of the at least one third composite mechanism 183 is used to use One of the first type of pole pieces, at least one of the second type of pole pieces, and two of the multiple diaphragms are combined to form a third composite pole piece, winding group
  • the member 11 is used for winding all the third composite pole pieces to form an electrode assembly with a winding structure.
  • the device for preparing the electrode assembly further includes a fourth composite mechanism 184, and the fourth composite mechanism 184 is used to combine multiple pieces of the first type and at least one piece of the second type.
  • the pole piece and the multiple diaphragms are combined to form a fourth composite pole piece, and the winding assembly 11 is used to wind the fourth composite pole piece to form an electrode assembly with a winding structure.
  • the device for preparing the electrode assembly since the device for preparing the electrode assembly is to wind a plurality of first-type pole pieces, at least one second-type pole piece, and multiple separators to obtain an electrode assembly with a wound structure, that is, Winding multiple pieces of the first type pole piece and multiple pieces of the second type pole piece on the winding assembly 11 at the same time, the length of the pole piece obtained by winding the winding assembly 11 once is equivalent to winding one piece of the first type on the winding assembly 11 It has a length that rotates multiple times at a time, so the number of winding turns is reduced, thereby improving the winding efficiency of the electrode assembly.
  • the second type of pole piece can be designed such that one piece of the second type of pole piece corresponds to multiple pieces of the first type of pole piece.
  • the electrode assembly obtained by winding the sheets.
  • the electrode assembly prepared in this embodiment is an electrode assembly formed by superimposing and winding multiple first type pole pieces, at least one second type pole piece and multiple diaphragms, that is, this embodiment
  • the prepared electrode assembly is equivalent to dividing a single piece of the first type pole piece whose length is equal to the sum of the lengths of multiple pieces of the first type pole piece and a single piece of second type pole piece whose length is equal to the sum of the lengths of at least one piece of the second type pole piece.
  • the segment is obtained by winding multiple pieces in parallel.
  • the electrode assembly prepared in this embodiment has multiple pieces of the same polarity inside the electrode assembly, and the internal resistance of the electrode assembly is smaller, thereby reducing the heat generation of the electrode assembly during use and improving the electrode The performance of the component.
  • the sheet is wound, it is necessary to control the alignment of multiple tabs of the same polarity to ensure the electrical connection after the subsequent electrode assembly is assembled into the battery.
  • the position of the tabs is calculated according to the winding radius corresponding to the tabs during winding. Therefore, the more winding turns, the greater the change in the winding radius, and the more difficult it is to accurately calculate the position between the tabs.
  • the misalignment of the tabs (that is, the degree of misalignment of the tabs) is more difficult to control.
  • the length of the pole piece is shortened and the number of winding turns is reduced. Therefore, the ability to control the displacement of the tab during the winding process can be improved, and the quality of the electrode assembly can be improved.
  • the following embodiments take one winding assembly, two pole piece unwinding devices of the first type, and two pole piece unwinding devices of the second type as examples.
  • the device for preparing an electrode assembly includes a winding assembly 101 and two first type electrodes.
  • the two first-type pole piece unwinding devices 102 are used to provide the winding assembly 101 with two first-type pole pieces.
  • the two second-type pole piece unwinding devices 103 are used to provide the winding assembly 101 with two second-type pole pieces.
  • the winding assembly 101 is used for stacking and winding two pole pieces of the first type and two pole pieces of the second type into an electrode assembly having a winding structure.
  • the electrode assembly includes a first type pole piece, a second type pole piece, another first type pole piece, and another second type pole piece superimposed in a direction perpendicular to the winding axis of the winding structure.
  • the first type of pole piece and the second type of pole piece have opposite polarities, and both have their own insulating layer.
  • the first type of pole piece and the second type of pole piece are separated by an insulating layer to prevent short circuits.
  • the first type of pole piece is a positive electrode piece with an insulating layer
  • the second type of pole piece is a negative electrode piece with an insulating layer
  • the first type of pole piece is a negative electrode piece with an insulating layer
  • the second type of pole piece is a positive electrode piece with an insulating layer.
  • the winding assembly 101 includes a switching device 1011. Three winding cores are provided on the switching device 1011. To distinguish them, they are defined as a first winding core 1012, a second winding core 1013, and a third winding core 1014.
  • the first winding core 1012, The second winding core 1013 and the third winding core 1014 are arranged at intervals along the rotation axis of the switching device 1011. Along the circumferential direction of the switching device 1011, a first station, a second station, and a third station are provided.
  • the switching device 1011 rotates, and the first winding core 1012 is located at the second station
  • the second winding core 1013 is located at the third station
  • the third winding core 1014 is located at the first station
  • the switching device 1011 rotates, and when the first winding core 1012 is located at the third station, the second winding core 1013 is located at the first station.
  • the third winding core 1014 is located at the second station, and the cycle is repeated.
  • the second station and the third station can be combined into one station as the unloading station.
  • the winding core corresponding to the loading station winds two pole pieces of the first type and two pole pieces of the second type to form an electrode assembly with a winding structure.
  • the switching device 1011 moves the winding core with the electrode assembly to the glue application station, and the finishing tape is applied. Finally, the switching device 1011 moves the winding core with the electrode assembly to the unloading station to facilitate the discharge of the electrode assembly.
  • the apparatus for preparing the electrode assembly further includes a first cut-off piece 104 and a second cut-off piece 105.
  • the first cutting element 104 is set at the loading station, and is used to cut off other first pole pieces on the basis of retaining at least one pole piece of the first type or the second type of pole piece when the winding electrode assembly of the winding core reaches a predetermined number of turns.
  • One kind of pole piece and the second kind of pole piece is one kind of pole piece and the second kind of pole piece.
  • the second cutting piece 105 is arranged between the first station and the second station.
  • the second cutting piece 105 is used to cut the remaining at least one pole piece of the first type or the second type when the core is in the second station. Pole piece.
  • the winding surface of the winding core 112 may be provided with at least one negative pressure port for absorbing at least one of the plurality of first type pole pieces or at least one second type pole piece
  • the equipment for preparing the electrode assembly may also include a pressing roller and a blowing mechanism.
  • the pressing roller is used to roll the two first pole pieces.
  • the winding start section of at least one of the one pole piece and the two second type pole pieces is pressed against the winding core;
  • the blowing mechanism is used to blow the end of the winding start section to the surface of the winding core to facilitate winding
  • the core is wound around the initial winding section to drive other pole pieces of the first type and the second type of pole pieces to be wound.
  • the equipment for preparing the electrode assembly further includes a glue preparation mechanism 106 and a glue application mechanism 107.
  • the glue preparation mechanism 106 is used to provide finishing tape to the glue application mechanism 107.
  • the glue applicator 107 is arranged downstream of the feeding station, that is, the second station, and is used to apply the finishing tape on the winding structure after the winding is completed.
  • the following embodiments take one winding assembly, two first-type pole piece unwinding devices, two second-type pole piece unwinding devices, and four diaphragm unwinding devices as examples.
  • the device for preparing an electrode assembly includes a winding assembly 201 and two electrodes of the first type.
  • the two first-type pole piece unwinding devices 202 are used to provide the winding assembly 201 with two first-type pole pieces a1 and a2.
  • the two second-type pole piece unwinding devices 203 are used to provide the winding assembly 201 with two second-type pole pieces b1 and b2.
  • the four diaphragm unwinding device 204 is used to provide four diaphragms c1, c2, c3, and c4 to the winding assembly 201.
  • the winding assembly 201 is used to pair the first diaphragm c1 with a first type pole piece a1, the second diaphragm c2 and a second type pole piece b1, and the third diaphragm c3 and another first type.
  • the pairing of the pole piece a2, the pairing of the fourth diaphragm c4 and the other second type of pole piece b2 are superimposed and wound into an electrode assembly with a winding structure.
  • the electrode assembly includes a first sheet of diaphragm c1, a first type of pole piece a1, a second sheet of diaphragm c2, a second type of pole piece b1, and a third sheet of diaphragm that are alternately stacked in the direction perpendicular to the winding axis of the winding structure. c3, another piece of first type pole piece a2, fourth piece of diaphragm c4, and another piece of second type pole piece b2. In other words, the adjacent pole pieces of the first type and the pole pieces of the second type are separated by a diaphragm.
  • the winding assembly 201 includes a switching device 210.
  • Three winding cores are provided on the switching device 210. To distinguish them, they are defined as a first winding core 211, a second winding core 212, and a third winding.
  • the core 213 is provided with a first station, a second station and a third station along the direction of the switching device 210.
  • the switching device 210 When the first winding core 211 is located at the first station, the second winding core 212 is located at the second station, the third winding core 213 is located at the third station, the switching device 210 is rotated, and the first winding core 211 is located at the second station.
  • the switching device 210 rotates, and when the first winding core 211 is located at the third station, the second winding core 212 is located at the first station.
  • the third winding core 213 is located in the second station, so as to circulate.
  • Gluing station and unloading station can be combined into unloading station. That is, the unloading station includes the glue station and the unloading station.
  • the first winding core 211, the second winding core 212 and the third winding core 213 are arranged at intervals along the rotation axis of the switching device 210.
  • each reel core operates in the loading station and the unloading station in turn following the rotation of the switching device 210, thereby improving the work efficiency.
  • the apparatus for preparing the electrode assembly further includes a first cutting part 221 and a second cutting part 222.
  • the first cutting member 221 is arranged at a position corresponding to the first station on the outside of the switching device 210, corresponding to the first cutting member 221, and is provided with a knife seat 223.
  • the first cutting member 221 cooperates with the knife seat 223 to cut the diaphragm.
  • the second cutting member 222 is arranged on the outside of the switching device 210 and corresponds to between the first station and the second station.
  • the first winding core 211 When the first winding core 211 is located at the first station, it receives two pieces of the first type pole piece, two pieces of the second type pole piece and four pieces of diaphragm, and winds them. After being wound to a preset length, the On the basis of one diaphragm, the other three diaphragms entering the first winding core 211 are cut by the first cutting piece 221. When the first winding core 211 is located at the second station, the remaining piece of diaphragm is cut by the second cutting member 222.
  • the first winding core 211 continues to rotate to wind the remaining piece of diaphragm as the outermost layer of the winding structure.
  • the reserved piece of diaphragm is the innermost diaphragm of the electrode assembly, and the innermost diaphragm of the electrode assembly is used as the reserved diaphragm and finally wound to form the outermost layer of the electrode assembly, which can prevent the remaining diaphragm from surrounding other diaphragms and
  • the end step phenomenon occurs, which causes the problem of lithium evolution when the electrode assembly is applied to the battery.
  • the device for preparing the electrode assembly further includes a first set of feeding assemblies 231, a second set of feeding assemblies 232, a third set of feeding assemblies 233, and a fourth set of feeding assemblies 234.
  • the first set of feeding components 231 send the winding start section of the first diaphragm c1 and the winding start section of the first pole piece a1 into the first winding core 211 corresponding to the feeding station.
  • the second set of feeding components 232 feed the winding start section of the second diaphragm c2 and the winding start section of the second type of pole piece b1 into the first winding core 211 corresponding to the feeding station.
  • the third set of feeding components 233 send the winding start section of the third diaphragm c3 and the winding start section of the other first pole piece a2 into the first winding core 211 corresponding to the feeding station.
  • the fourth set of feeding components 234 feed the winding start section of the fourth diaphragm c4 and the winding start section of another second type pole piece b2 into the first winding core 211 corresponding to the feeding station.
  • the device for preparing the electrode assembly further includes a guide plate 240, which is provided at the loading station of the winding assembly 201, and the guide plate 240 is configured to separate the first type of pole piece and the second type of pole piece. And the diaphragm is guided to the feeding station of the winding assembly 201.
  • the equipment for preparing the electrode assembly further includes a glue preparation mechanism 251 and a glue application mechanism 252.
  • the gluing mechanism 252 is located downstream of the feeding station, corresponding to the gluing station of the unloading station, and is used to paste the finishing tape on the winding structure after the winding is completed.
  • the glue preparation mechanism 251 is located in the gluing station The downstream, that is, the third station, is used to provide finishing tape to the glue applicator 252.
  • the glue applying mechanism 252 sticks the finishing tape to the winding structure, and the preparation of the electrode assembly is completed.
  • the working processes of the second winding core 212 and the third winding core 213 are the same as the working processes of the first winding core 211, and will not be repeated here.
  • the first group of feeding components 231, the second group of feeding components 232, the third group of feeding components 233, and the fourth group of feeding components 234 all include first feeding parts 2301 that work in cooperation with each other.
  • a cutting piece 221 cooperates with the knife holder 223 to cut the diaphragm.
  • the first loading part 2301 is used to clamp the winding start section of the diaphragm of the corresponding loading station, and the winding start section is sent to the first winding core 211, and the first cutting part 221 After the diaphragm is cut, the first loading member 2301 clamps the end of the electrode assembly preformed before the diaphragm, moves the end of the diaphragm to the first winding core 211, and the second loading member 2302 is used to clamp the rear end of the electrode assembly.
  • the winding start section of the separator of the pre-formed electrode assembly is used to clamp the winding start section of the separator of the pre-formed electrode assembly.
  • a plurality of small vacuum negative pressure ports 214 are distributed on the surfaces of the first winding core 211, the second winding core 212 and the third winding core 213. Each negative pressure port 214 is used for adsorbing the diaphragm, which facilitates smooth feeding.
  • the device for preparing an electrode assembly includes a winding assembly 301, and two electrodes of the first type.
  • Sheet unwinding device 302 two second-type pole piece unwinding devices 303, and four diaphragm unwinding devices 304.
  • the functions of the winding assembly 301, two first type pole piece unwinding devices 302, two second type pole piece unwinding devices 303, and four diaphragm unwinding devices 304 are the same as those of the winding assembly in the second embodiment.
  • the two pole piece unwinding devices 202 of the first type, the two pole piece unwinding devices 203 of the second type, and the four diaphragm unwinding devices 204 are similar, and will not be repeated here.
  • the difference between the third embodiment and the second embodiment can be at least as follows.
  • the device for preparing the electrode assembly further includes two first composite mechanisms 311 and two second composite mechanisms 312.
  • Each of the two first composite mechanisms 311 is used to composite one of the two first type pole pieces and one of the four diaphragms into a first composite pole piece.
  • the first composite mechanism 311 can be compositely connected to the first type of pole piece and the diaphragm through composite methods such as electrostatic adsorption, hot-press composite, or glue composite.
  • the first type of pole piece and the diaphragm are laminated along the thickness direction of the first type of pole piece.
  • the four diaphragm unwinding devices 304 provide four diaphragms, and each first-type pole piece and one diaphragm pass through a first composite mechanism 311 Compounding is performed, and therefore, two first composite pole pieces can be formed.
  • Each of the two second composite mechanisms 312 is used to composite one of the two second type pole pieces and the other of the four diaphragms into a second composite pole piece .
  • the second composite mechanism 312 can compositely connect the second type of pole piece and the diaphragm through composite methods such as electrostatic adsorption, hot-press composite, or glue composite.
  • the second type of pole piece and the diaphragm are laminated along the thickness direction of the second type of pole piece.
  • two second-type pole piece unwinding devices 303 provide two second-type pole pieces
  • four diaphragm unwinding devices 304 provide four diaphragms, and each second-type pole piece and one diaphragm pass through a second composite mechanism 312 Recombination is performed, and therefore, two second composite pole pieces can be formed.
  • the winding assembly 301 is used to wind the two first composite pole pieces and the two second composite pole pieces to form a winding structure.
  • the first type of pole piece and the diaphragm are combined by the first composite mechanism 311, so that the first type of pole piece and the diaphragm are connected to each other to form an integral first composite pole piece.
  • the composite mechanism 312 composites the second type of pole piece and the diaphragm, so that the second type of pole piece and the diaphragm are connected to each other to form an integral second composite pole piece, and then all the first composite pole pieces and the second composite pole piece are sent Enter the winding assembly 301 for winding.
  • the first type of pole piece and the second type of pole piece respectively enter the winding assembly 301 under the drive of their corresponding diaphragms for winding, and respectively enter the winding assembly 301 relative to the first type of pole piece, the second type of pole piece and the diaphragm.
  • the winding method of the winding assembly 301 reduces the number of feeding layers of the feeding station of the winding assembly 301, avoids mutual interference caused by multi-layer feeding, and reduces the first type of pole piece, the second type of pole piece and the diaphragm.
  • the difficulty of alignment can reduce the possibility that the first pole piece and the second pole piece are not aligned with each other, improve the winding alignment accuracy, facilitate operation, and improve efficiency.
  • the alignment here means that the first type of pole piece, the second type of pole piece and the diaphragm are aligned with each other along their respective width directions.
  • the first type of pole piece and the second type of pole piece respectively enter the winding assembly 301 for winding under the drive of their corresponding diaphragms, which can reduce the first type of pole piece and the second type of pole piece from entering the winding process.
  • the first type of pole piece and the second type of pole piece are respectively driven by their corresponding diaphragms into the winding assembly 301 for winding, and the number of feeding layers of the feeding station of the winding assembly 301 is reduced, correspondingly Yes, the number of winding auxiliary mechanisms at the loading station of the winding assembly 301 to guide the winding of each of the first type of pole piece, the second type of pole piece and the diaphragm can be reduced, which simplifies the whole of the winding assembly 301
  • the structure is convenient to have enough space to set up the auxiliary mechanism for feeding each layer, and it is helpful to improve the efficiency of winding work.
  • the equipment for preparing the electrode assembly includes four heating members 320.
  • the heating element 320 is used to heat the diaphragm provided by the diaphragm unwinding device 304.
  • the diaphragm Before the diaphragm is fed into the composite mechanism, the diaphragm is heated by the heating element 320 to cause physical or chemical changes to the diaphragm, and then the diaphragm is compounded with the first type of pole piece, which will help the diaphragm and the first type of pole piece to better adhere to each other. Together, the flatness of the formed first composite pole piece is improved, and the probability of separation of the first type pole piece from its corresponding diaphragm is reduced.
  • One of the four heating elements 320 is provided between a diaphragm unwinding device 304 and a first composite mechanism 311.
  • One heating element 320 of the four heating elements 320 is arranged between a diaphragm unwinding device 23 and a second composite mechanism 312. The heating element 320 is used to heat the diaphragm provided by the diaphragm unwinding device 23.
  • the diaphragm Before the diaphragm is fed into the first composite mechanism 311 and the second composite mechanism 312, the diaphragm is heated by the heating element 320 to cause physical or chemical changes in the diaphragm, and then the diaphragm is combined with the second type of pole piece, which is beneficial to the diaphragm and the second type of pole piece.
  • the second type of pole piece fits better, improves the flatness of the formed second composite pole piece, and reduces the probability of separation of the second type of pole piece from its corresponding diaphragm.
  • the equipment for preparing the electrode assembly further includes a third cutting member 331, the third cutting member 331 is provided between the first type of pole piece unwinding device 302 and the first composite mechanism 311, and the third cutting member 331 It is configured to cut the first type of pole piece provided by the first type of pole piece unwinding device 302.
  • the station where the first type of pole piece is cut is located upstream of the first composite mechanism 311, far away from the first composite mechanism 311, and the station where the first type of pole piece and the diaphragm are composited by the first composite mechanism 311 is far away from the winding assembly 301
  • the winding station therefore, the first type of pole piece is cut upstream of the first composite mechanism 311, which can further effectively reduce the possibility of the dust generated by the first type of pole piece being cut into the winding assembly 301. And to reduce the risk of short circuit between the first type of pole piece and the second type of pole piece due to the dust in the winding assembly 301 piercing the diaphragm.
  • the equipment for preparing the electrode assembly further includes a fourth cutting member 332.
  • the fourth cutting member 332 is provided between the second type of pole piece unwinding device 303 and the second composite mechanism 312, and is configured to align the The second type of pole piece provided by the two types of pole piece unwinding device 303 is cut.
  • the station where the second type of pole piece is cut is located upstream of the second composite mechanism 312, far away from the second composite mechanism 312, and the station where the second type of pole piece and the diaphragm are composited by the second composite mechanism 312 is away from the winding assembly 301
  • the winding station therefore, cutting the second type of pole piece upstream of the second composite mechanism 312 can further effectively reduce the possibility of the dust generated by the second type of pole piece being cut into the winding assembly 301. And to reduce the risk of short circuit between the first type of pole piece and the second type of pole piece due to the dust in the winding assembly 301 piercing the diaphragm.
  • the winding assembly 301 includes a turntable 3011 and three winding cores 3012, and the device for preparing the electrode assembly further includes a first cutting member 351, a second cutting member 352, and two upper ⁇ Component 340.
  • the first cutting member 351 is used for cutting three diaphragms
  • the second cutting member 352 is used for cutting one diaphragm.
  • One of the loading components 340 is used to clamp one diaphragm
  • the other loading component 340 is used to clamp the other three diaphragms.
  • the feeding assembly 340 is used to feed the winding start section of the diaphragm entering the feeding station corresponding to the feeding assembly 340 into the winding core 3012 corresponding to the feeding station, with a high degree of automation.
  • the loading assembly 340 is also used to clamp the end of the first diaphragm and clamp the next pre-formed electrode assembly after the winding structure is wound to a predetermined number of turns and the first diaphragm is cut.
  • the winding start section of the diaphragm is also used to clamp the end of the first diaphragm and clamp the next pre-formed electrode assembly after the winding structure is wound to a predetermined number of turns and the first diaphragm is cut.
  • the winding start section or the winding end section of the diaphragm is clamped by the feeding assembly 340 and sent to the winding core 3012, which can provide a controllable tension force for the winding start section or the end section of the diaphragm.
  • the equipment for preparing the electrode assembly includes a pressing roller 361 and a blowing mechanism 362 corresponding to each loading station.
  • the blowing mechanism 362 is used to blow the end of the winding start section of the four diaphragms to the winding core 3012, and the winding core 3012 winds the diaphragm.
  • the winding start section drives two pole pieces of the first type and two pole pieces of the second type to form a winding structure.
  • the device for preparing an electrode assembly includes a winding assembly 401, two first-type electrodes Sheet unwinding device 402, two second-type pole piece unwinding devices 403, and four diaphragm unwinding devices 404.
  • the functions of the winding assembly 401, two first type pole piece unwinding devices 402, two second type pole piece unwinding devices 403, and four diaphragm unwinding devices 404 are the same as those of the winding assembly in the third embodiment. 301.
  • the two pole piece unwinding devices 302 of the first type, the two pole piece unwinding devices 303 of the second type and the four diaphragm unwinding devices 304 are similar, and will not be repeated here.
  • the difference between the fourth embodiment and the third embodiment can be at least as follows.
  • the device for preparing the electrode assembly also includes two first composite mechanisms 411, two second composite mechanisms 412, and two third composite mechanisms 413.
  • Each of the two first composite mechanisms 411 is used to composite one of the two first type pole pieces and one of the four diaphragms into a first composite pole piece.
  • Each of the two second composite mechanisms 412 is used to composite one of the two second type pole pieces and the other of the four diaphragms into a second composite pole piece .
  • Each of the two third composite mechanisms 43 is used to composite a first composite pole piece and a second composite pole piece to form a third composite pole piece, and the winding assembly 401 is used to combine each third The composite pole piece is wound to form a winding structure.
  • the equipment for preparing the electrode assembly further includes a third cutting member 421, the third cutting member 421 is provided between the first type of pole piece unwinding device 402 and the first composite mechanism 411, and the third cutting member 421 It is configured to cut the first type of pole piece provided by the first type of pole piece unwinding device 402.
  • the station where the first type of pole piece is cut is located upstream of the first composite mechanism 411, far away from the first composite mechanism 411, and the station where the first type of pole piece and the diaphragm are composited by the first composite mechanism 411 is away from the winding assembly 401
  • the winding station therefore, the first type of pole piece is cut upstream of the first composite mechanism 411, which can further effectively reduce the possibility of the dust generated by the first type of pole piece being cut into the winding assembly 401. And to reduce the risk of short circuit between the first type of pole piece and the second type of pole piece due to the dust in the winding assembly 401 piercing the diaphragm.
  • the equipment for preparing the electrode assembly further includes a fourth cutting member 422.
  • the fourth cutting member 422 is provided between the second type of pole piece unwinding device 403 and the second composite mechanism 412, and is configured to align the The second type of pole piece provided by the two types of pole piece unwinding device 403 is cut.
  • the station where the second type of pole piece is cut is located upstream of the second composite mechanism 412, far away from the second composite mechanism 412, and the station where the second type of pole piece and the diaphragm are composited by the second composite mechanism 412 is far away from the winding assembly 401
  • the winding station therefore, cutting the second type of pole piece upstream of the second composite mechanism 412 can further effectively reduce the possibility of the dust generated by the second type of pole piece being cut into the winding assembly 401. And to reduce the risk of short circuit between the first type of pole piece and the second type of pole piece due to the dust in the winding assembly 401 piercing the diaphragm.
  • the device for preparing the electrode assembly further includes a heating element 440, and the heating element 440 is used to heat the diaphragm.
  • the device for preparing an electrode assembly further includes a winding assembly 501, two first types Pole piece unwinding device 502, two second type pole piece unwinding devices 503, four diaphragm unwinding devices 504, two fourth composite mechanisms 510 and four heating elements 520.
  • the functions of the winding assembly 501, two first type pole piece unwinding devices 502, two second type pole piece unwinding devices 503, and four diaphragm unwinding devices 504 are the same as those of the winding assembly in the second embodiment.
  • the two pole piece unwinding devices 202 of the first type, the two pole piece unwinding devices 203 of the second type and the four diaphragm unwinding devices 204 are similar and will not be repeated.
  • the fourth compounding mechanism 510 is used to compound one of the first type of the two pole pieces, one of the second type of the two pole pieces, and two diaphragms of the multiple diaphragms.
  • the fourth composite pole piece and winding assembly 501 is used to wind all the fourth composite pole pieces to form a winding structure.
  • Each heating element 520 is arranged between a diaphragm unwinding device 504 and the fourth composite mechanism 510 for heating the diaphragm.
  • the apparatus for preparing the electrode assembly includes a third cut-off piece 531 and a fourth cut-off piece 532.
  • the third cutting piece 531 is provided between the first type of pole piece unwinding device 502 and the fourth composite mechanism 510, and the third cutting piece 531 is configured as the first type of pole piece provided to the first type of pole piece unwinding device 502 Cut off.
  • the fourth cutting member 532 is provided between the second type of pole piece unwinding device 505 and the fourth composite mechanism 510, and is configured to cut the second type of pole piece provided by the second type of pole piece unwinding device 505.
  • some embodiments provide a method for preparing the electrode assembly.
  • the preparation method of the electrode assembly includes:
  • the first type of pole piece and the second type of pole piece are opposite in polarity;
  • a plurality of pole pieces of the first type and at least one pole piece of the second type are wound to form an electrode assembly.
  • the preparation method of the electrode assembly can be consistent with the use process of the device for preparing the electrode assembly described above.
  • the preparation method of the electrode assembly provided by the present application winds a plurality of first type pole pieces and at least one second type pole piece to obtain an electrode assembly with a winding structure, that is, a plurality of first type pole pieces are wound on the winding assembly at the same time.
  • the length of the pole piece obtained by winding the winding assembly once is equivalent to rotating at least two pole pieces when the winding assembly winds a piece of the first type of pole piece and a piece of the second type of pole piece.
  • the length of the windings, and therefore the number of winding turns, is reduced, thereby improving the winding efficiency of the electrode assembly.
  • the electrode assembly obtained by winding the sheet, the electrode assembly prepared in this embodiment, is an electrode assembly formed by superimposing and winding a plurality of first type pole pieces and at least one second type pole piece, that is, the electrode assembly prepared in this embodiment It is equivalent to segmenting a single piece of the first type of pole piece whose length is equal to the sum of the lengths of multiple pieces of the first type of pole piece and a single piece of the second type of pole piece whose length is equal to the sum of the lengths of at least one piece of the second type of pole piece into multiple pieces respectively It is obtained by parallel winding.
  • the electrode assembly prepared in this embodiment has multiple pole pieces with the same polarity inside, and the internal resistance of the electrode assembly is smaller, thereby reducing the heat generation of the electrode assembly during use and improving the performance of the electrode assembly.
  • a single piece of the first type pole piece with a length equal to the sum of the lengths of multiple pieces of the first type pole piece and a single piece of the second type pole piece with a length equal to the sum of the lengths of at least one piece of the second type pole piece are used.
  • the multiple tabs on the same-sex pole piece are aligned.
  • the tabs on the multiple same-sex pole pieces are aligned side by side before being wound, and the length of the pole piece is shortened. The number of turns is reduced, and therefore, the amount of dislocation of the tab is reduced, which can improve the control ability of the tab dislocation during the winding process, and improve the quality of the electrode assembly.
  • the preparation method of the electrode assembly provided in the present application further includes providing a plurality of diaphragms, and the diaphragms are used to isolate the first type of pole piece and the second type of pole piece.
  • the winding assembly is used to unwind a plurality of first type pole pieces provided by a plurality of first type pole piece unwinding devices, at least one second type pole piece and multiple diaphragms provided by at least one second type pole piece unwinding device.
  • the multiple sheets of separator provided by the winding device are wound to form at least one electrode assembly having a winding structure.
  • the plurality of first type pole pieces, at least one second type pole piece, and multiple pieces of the first type pole piece, at least one second type pole piece and multiple pieces is wound.
  • the preparation method of the electrode assembly further includes: feeding the winding start section of at least one of the plurality of separators into the winding core of the winding assembly for a certain length, and then winding the remaining multiple separators
  • the diaphragm is fed into the winding core and is driven by at least one diaphragm to wind the remaining diaphragm.
  • the preparation method of the electrode assembly further includes: each of the at least one first cut-off part cuts the entry roll on the basis of retaining at least one diaphragm when the winding structure is wound to a predetermined number of turns. Around the other diaphragms of the first loading station where the structure is located.
  • Each of the at least one second cut-off piece cuts the remaining at least one diaphragm between the first feeding station and the first unloading station after the remaining at least one diaphragm is successfully loaded at the loading station.
  • a diaphragm A diaphragm.
  • each of the at least one negative pressure port of each winding core absorbs at least one of the plurality of diaphragms.
  • each of the plurality of first composite mechanisms combines one of the first type of pole pieces and one of the multiple diaphragms into a first composite pole. piece
  • Each of the at least one second composite mechanism combines at least one of the second type of pole pieces and the other of the multiple diaphragms into a second composite pole piece
  • the winding assembly winds all the first composite pole pieces and all the second composite pole pieces to form an electrode assembly.
  • the winding start section of the diaphragm corresponding to a first composite pole piece is fed into the winding core and wound for a certain length
  • the winding start sections of the remaining first composite pole piece and the diaphragm of the two second composite pole pieces are jointly fed into the winding core, and the remaining diaphragm is driven to wind by the diaphragm of the first composite pole piece that was fed first.
  • the preparation method of the electrode assembly includes at least one third composite mechanism for each third composite mechanism to combine one second type pole piece and at least one second type pole piece among a plurality of second type pole pieces.
  • One of the second type of pole piece and two of the multiple diaphragms are compounded to form a third composite pole piece;
  • the winding assembly winds all the third composite pole pieces to form an electrode assembly.
  • the preparation method of the electrode assembly includes a fourth composite mechanism that composites a plurality of first type pole pieces, at least one second type pole piece, and multiple diaphragms into a fourth composite pole piece, and the winding assembly combines the fourth composite pole piece.
  • the composite pole piece is wound to form an electrode assembly.
  • an electrode assembly formed by winding four pole pieces and four diaphragms is taken as an example to describe the preparation method of the electrode assembly.
  • the four pole pieces are defined as pole piece 1, pole piece 2, and pole piece three.
  • Pole piece four, the preparation method of the electrode assembly includes:
  • the unwinding device provides four diaphragms and four pole pieces, that is, one to four pole pieces, and the four diaphragms are heated by the heating element; the heated four diaphragms and one to four pole pieces are fed into the corresponding composite mechanism, composite mechanism The diaphragm and the pole piece are combined to form a composite pole piece.
  • the pole piece is cut, and the pole piece in the unwinding device waits for the next release of the pole piece.
  • the winding start section of the composite pole piece is a section of the diaphragm head of the uncomposited pole piece.
  • the diaphragm head of the composite pole piece one, that is, the winding start section of the diaphragm, is sent to the winding core through a loading assembly.
  • the core suction diaphragm at the first station completes the first winding.
  • the negative pressure port set on the winding core can easily absorb the diaphragm head. After the winding is stable, another feeding component winds the composite pole piece two to four and the composite pole piece one together.
  • the diaphragm where the composite pole pieces two to four are located is cut off, the winding core is switched from the first station to the second station, the diaphragm corresponding to the composite pole piece one is cut, and the composite pole piece As soon as the sheet is continuously wound by the core, the composite pole piece is wound to the outermost layer of the electrode assembly, and the end tape can be attached.
  • the winding core can be switched to the third station, and the electrode assembly on which the winding core is in the third station is unloaded.
  • the winding start section of one diaphragm c is first sent to the winding core to be wound for a certain length, and then the winding start sections of the remaining three separators c are fed into the winding core together and passed through the previous feeding section.
  • the inserted diaphragm drives the remaining diaphragm to wind, and the winding is completed and the finishing tape f is applied.
  • FIG. 26 the structure of the electrode assembly formed by the above-mentioned winding method is shown in FIG. 26.
  • the winding start sections of the four diaphragms c are fed into the winding core for winding together.
  • the winding start sections of the four diaphragms c are fed into the winding core for winding together, After the winding is completed, the finishing tape f is applied, and the structure of the electrode assembly formed by this winding method is shown in FIG. 27.
  • the winding start sections of multiple diaphragms c are sequentially fed into the winding core for winding, and after the winding start section of the previous separator is fed into the winding core to be wound for a certain length, the multiple sheets The other of the diaphragms is fed into the winding core, and then the remaining membranes of the multiple diaphragms are sequentially fed into the winding core for winding in the above-mentioned manner.
  • the winding start section of the first separator is sent to the winding core for winding.
  • the winding start section of the second diaphragm is sent to the winding core for winding.
  • the third diaphragm is wound up The initial section is sent to the core for winding.
  • the winding start section of the fourth diaphragm is sent to the core for winding.
  • the tail glue f is used. The structure of the electrode assembly formed by the method is shown in FIG. 28.
  • the motor assembly prepared by using the device for preparing the electrode assembly and the method for preparing the electrode assembly provided by the embodiments of the present disclosure can effectively reduce the internal resistance of the electrode assembly, and alleviate the high heat generation of the electrode assembly during high-power charging and discharging of the electrode assembly, which is safe Risk, shorten the battery life issue.
  • the electrode assembly can be applied to consumer electrode assemblies, power electrode assemblies, energy storage electrode assemblies, and the like.

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Abstract

本申请涉及一种制备电极组件的设备及电极组件的制备方法。其中，制备电极组件的设备包括：卷绕组件；多个第一种极片放卷装置，用于向所述卷绕组件提供多片第一种极片；和至少一个第二种极片放卷装置，用于向所述卷绕组件提供至少一片第二种极片，所述第一种极片与所述第二种极片的极性相反；其中，所述卷绕组件用于将所述多片第一种极片和所述至少一片第二种极片进行卷绕，以形成电极组件。本申请用于提高电极组件的卷绕效率。

Description

制备电极组件的设备及电极组件的制备方法 技术领域
本申请涉及电池领域，尤其涉及一种制备电极组件的设备及电极组件的制备方法。
背景技术
现有技术中，电池的制备需要将正极片、负极片进行卷绕形成电极组件后，放入电池壳体内形成电池。卷绕作为电池制备过程中重要的一环，本领域技术人员一直致力于提高其效率。
发明内容
本申请的一些实施例提出一种制备电极组件的设备及电极组件的制备方法，用于提高卷绕效率。
本申请的一些实施例提供了一种制备电极组件的设备，其包括：
卷绕组件；
多个第一种极片放卷装置，用于向所述卷绕组件提供多片第一种极片；和
至少一个第二种极片放卷装置，用于向所述卷绕组件提供至少一片第二种极片，所述第一种极片与所述第二种极片的极性相反；
其中，所述卷绕组件用于将所述多片第一种极片和所述至少一片第二种极片进行卷绕，以形成电极组件。
在一些实施例中，制备电极组件的设备还包括多个隔膜放卷装置，所述多个隔膜放卷装置用于向所述卷绕组件提供多片隔膜，所述隔膜用于隔离所述第一种极片和所述第二种极片。
在一些实施例中，所述卷绕组件包括卷芯，所述卷芯用于将所述多片第一种极片、所述至少一片第二种极片和所述多片隔膜卷绕。
在一些实施例中，所述卷芯设有至少一个负压口，用于吸附所述多片隔膜中的至少一片隔膜的卷绕起始段。
在一些实施例中，所述负压口包括所述卷芯的卷绕表面上设置的凹孔或贯穿孔。
在一些实施例中，所述负压口为三角形、圆形、四方形或不规则形状。
在一些实施例中，所述负压口在所述卷芯的卷绕表面阵列分布。
在一些实施例中，制备电极组件的设备还包括：
压辊，用于将所述多片隔膜中的至少一片隔膜的卷绕起始段压向所述卷芯；
喷吹机构，用于将所述卷绕起始段的端部吹贴于所述卷芯表面，以便所述卷芯卷绕所述卷绕起始段,以带动所述多片第一种极片、所述至少一片第二种极片和所述多片隔膜卷绕。
在一些实施例中，所述卷绕组件还包括切换装置,所述卷芯设于所述切换装置,所述切换装置用于使所述卷芯在上料工位和下料工位之间切换。
在一些实施例中，制备电极组件的设备包括：
第一切断件，用于当所述卷芯卷绕所述电极组件达到预定圈数时，切断所述多片隔膜中的至少一片且保留至少一片隔膜；或
第二切断件，用于当所述卷芯在所述下料工位时，切断所述保留的至少一片隔膜。
在一些实施例中，制备电极组件的设备还包括第一上料件，用于将所述至少一片隔膜的所述卷绕起始段送入所述卷芯。
在一些实施例中，制备电极组件的设备包括第二上料件，用于当切断所述多片隔膜中的至少一片时，夹住所述被切断的至少一片隔膜。
在一些实施例中，制备电极组件的设备包括：
多个第一复合机构，所述多个第一复合机构中的每个第一复合机构用于将所述多片第一种极片中的一片第一种极片和所述多片隔膜中的一片隔膜复合成第一复合极片，
至少一个第二复合机构，所述至少一个第二复合机构中的每个第二复合机构用于将所述至少一片第二种极片中的一片第二种极片和所述多片隔膜中的另一片隔膜复合成第二复合极片，
所述卷绕组件用于将所有的所述第一复合极片和所有的所述第二复合极片卷绕形成电极组件。
在一些实施例中，制备电极组件的设备包括至少一个第三复合机构，所述至少一个第三复合机构中的每个第三复合机构用于将所述多片第一种极片中的一片第一种极片、所述至少一片第二种极片中的一片第二种极片和所述多片隔膜中的两片隔膜复合成第三复合极片；
所述卷绕组件用于将所有的所述第三复合极片卷绕形成电极组件。
在一些实施例中，制备电极组件的设备包括第四复合机构，用于将所述多片第一种极片、所述至少一片第二种极片和所述多片隔膜复合成第四复合极片，所述卷绕组件用于将所述第四复合极片卷绕形成所述电极组件。
本申请的一些实施例提供了一种电极组件的制备方法，其包括：
提供多片第一种极片；
提供至少一片第二种极片，所述第一种极片和所述第二种极片极性相反；
将所述多片第一种极片和所述至少一片第二种极片进行卷绕，以形成电极组件。
在一些实施例中，电极组件的制备方法还包括：提供多片隔膜，所述隔膜用于隔离所述第一种极片和所述第二种极片。
在一些实施例中，吸附所述多片隔膜中的至少一片隔膜的卷绕起始段，将所述多片第一种极片、所述至少一片第二种极片和所述多片隔膜卷绕。
在一些实施例中，将所述多片隔膜中的至少一片隔膜的卷绕起始段送入所述卷绕组件的卷芯卷绕一定长度后，将所述多片隔膜中的剩余隔膜送入所述卷芯并通过所述至少一片隔膜带动所述剩余隔膜卷绕。
在一些实施例中，电极组件的制备方法包括：
多个第一复合机构中的每个第一复合机构将所述多片第一种极片中的一片第一种极片和所述多片隔膜中的一片隔膜复合成第一复合极片，
至少一个第二复合机构中的每个第二复合机构将所述至少一片第二种极片中的一片第二种极片和所述多片隔膜中的另一片隔膜复合成第二复合极片，
所述卷绕组件将所有的所述第一复合极片和所有的所述第二复合极片卷绕形成电极组件。
在一些实施例中，电极组件的制备方法包括至少一个第三复合机构中的每个第三复合机构将所述多片第一种极片中的一片第一种极片、所述至少一片第二种极片中的一片第二种极片和所述多片隔膜中的两片隔膜复合成第三复合极片；
所述卷绕组件将所有的所述第三复合极片卷绕形成电极组件。
在一些实施例中，电极组件的制备方法包括第四复合机构将所述多片第一种极片、所述至少一片第二种极片和所述多片隔膜复合成第四复合极片，所述卷绕组件将所述第四复合极片卷绕形成所述电极组件。
在上述描述的制备电极组件的设备及电极组件的制备方法中，由于制备电极组件的设备是以多片第一种极片和至少一片第二种极片进行卷绕得到具有卷绕结构的电 极组件，即在卷绕组件上同时卷绕多片第一种极片，卷绕组件卷绕一圈得到的第一种极片长度，相当于在卷绕组件卷绕一片第一种极片卷绕多圈的长度，因此卷绕圈数减少，从而提高了电极组件的卷绕效率。
附图说明
此处所说明的附图用来提供对本申请的进一步理解，构成本申请的一部分，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的不当限定。在附图中：
图1为根据本申请第一种实施例提供的制备电极组件的设备的示意图；
图2为根据本申请第二种实施例提供的制备电极组件的设备的示意图；
图3为根据本申请第三种实施例提供的制备电极组件的设备的示意图；
图4为根据本申请第四种实施例提供的制备电极组件的设备的示意图；
图5为根据本申请第五种实施例提供的制备电极组件的设备的示意图；
图6为根据本申请第六种实施例提供的制备电极组件的设备的示意图；
图7为根据本申请第七种实施例提供的制备电极组件的设备的示意图；
图8为根据本申请第八种实施例提供的制备电极组件的设备的示意图；
图9为根据本申请一些实施例提供的具有负压口的卷芯的示意图；
图10为根据本申请一些实施例提供的设有压辊和喷吹机构的示意图；
图11为根据本申请一些实施例提供的上料组件的其中一设置方式的示意图；
图12为根据本申请一些实施例提供的上料组件的示意图；
图13为根据本申请一些实施例提供的具有复合机构的制备电极组件的设备的示意图；
图14为根据本申请另一些实施例提供的具有复合机构的制备电极组件的设备的示意图；
图15为根据本申请再一些实施例提供的具有复合机构的制备电极组件的设备的示意图；
图16为根据本申请第一实施例提供的制备电极组件的设备的示意图；
图17为根据本申请第二实施例提供的制备电极组件的设备的示意图；
图18为图17的局部放大示意图；
图19为根据本申请第二实施例提供的制备电极组件的设备的卷芯具有负压口的 示意图；
图20为根据本申请第三实施例提供的制备电极组件的设备的示意图；
图21为图20的局部放大示意图；
图22为根据本申请第二实施例提供的制备电极组件的设备具有压辊和喷吹机构的示意图；
图23为根据本申请第四实施例提供的制备电极组件的设备的示意图；
图24为根据本申请第五实施例提供的制备电极组件的设备的示意图
图25为根据本申请一些实施例提供的电极组件的制备方法的流程示意图；
图26为根据本申请一些实施例提供的电极组件的示意图；
图27为根据本申请另一些实施例提供的电极组件的示意图；
图28为根据本申请再一些实施例提供的电极组件的示意图。
具体实施方式
下面将结合本申请实施例中的附图，对实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本申请的一部分实施例，而不是全部的实施例。基于本申请的实施例，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它实施例，都属于本申请保护的范围。
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请保护范围的限制。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同；本文中在申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请；本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。在本申请的描述中，需要理解的是，使用“第一”、“第二”、“第三”等词语来限定零部件，仅仅是为了便于对上述零部件进行区别，如没有另行声明，上述词语并没有特殊含义，因此不能理解为对本申请保护范围的限制。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包 含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
如图1所示，为本申请一些实施例提供的一种制备电极组件的设备的结构示意图，该制备电极组件的设备包括：卷绕组件11、多个第一种极片放卷装置12和至少一个第二种极片放卷装置13。
多个第一种极片放卷装置12中的每一个第一种极片放卷装置12用于向卷绕组件11提供第一种极片。即：多个第一种极片放卷装置12用于向卷绕组件11提供多片第一种极片。
至少一个第二种极片放卷装置13中的每一个第二种极片放卷装置13用于向卷绕组件11提供第二种极片。即：至少一个第二种极片放卷装置13用于向卷绕组件11提供至少一片第二种极片。
第一种极片与第二种极片的极性相反。
卷绕组件11用于将多片第一种极片和至少一片第二种极片进行卷绕，以形成电极组件。
每个电极组件包括沿垂直于卷绕结构的卷绕轴线方向叠加的多片第一种极片、至少一片第二种极片。
在本申请的另一实施例中，多个第一种极片放卷装置12、至少一个第二种极片放卷装置13围绕卷绕组件11四周分布使得各自提供的极片在进入卷绕组件11之前不缠绕。
电极组件所包括的多片第一种极片和至少一片第二种极片的数量可以相同，也可以不同，例如，一个电极组件包括2、3、4或5片第一种极片和1、2、3或4片第二种极片。为描述简洁，后续实施例中均以第一种极片和第二种极片的数量相同为例说明。
在本申请的另一实施例中，每片第一种极片和每片第二种极片形状基本相同，例如，电极组件的卷绕结构被展平后，第一种极片和第二种极片基本上是长条带形状，例如，为5-20米长的长条带形状，第一种极片和第二种极片的长度相差在预定范围内， 宽度尺寸基本相同。多片第一种极片、至少一片第二种极片叠加后，沿长条方向卷绕即可得到具有卷绕结构的电极组件，该卷绕结构具有卷绕轴线，多片第一种极片、至少一片第二种极片叠加的叠加面与该卷绕轴线基本平行。
在本申请的另一实施例中，电极组件所包括的多片第一种极片和至少一片第二种极片的叠加可以有多种形式，例如，电极组件的卷绕结构中，可以是以一片第一种极片和一片第二种极片的形式依次交替叠加，也可以是以每两片或两片以上第一种极片和一片第二种极片的形式依次交替叠加，还可以是以一片第一种极片与每两片或两片以上第二种极片的形式依次交替叠加。电极组件的多片第一种极片和至少一片第二种极片的叠加也可以理解为每相邻两片第一种极片之间包括至少一片第二种极片，或者，每相邻两片第二种极片之间包括至少一片第一种极片。
在本申请的另一实施例中，当相同极性的两片或两片以上极片之间没有其它不同极性的极片时，该相同极性的两片极片可以当作一组极片，则叠加时，是同一极性的极片组与另一不同极性的极片组或单片极片依次交替叠加，例如，两片或两片以上的正极片组成一组正极片组，两片或两片以上的负极片组成负极片组，叠加可以是：正极片组与负极片组依次交替叠加，正极片组与单片负极片依次交替叠加，或者，负极片组与单片正极片依次交替叠加。
由于同一极性的极片组可以当作一片极片，所以，为描述方便，后续描述的一片极片既可以是指单独一片极片，也可以是指多片同一极性的极片组成的极片组。
在本申请的另一实施例中，相同极性的两片极片相邻是指该相同极性的两片极片之间只有一片其它极性的极片，例如，两片第一种极片相邻是指该两片第一种极片之间只有一片第二种极片，两片第二种极片相邻是指该两片第二种极片之间只有一片第一种极片。
在本申请的一些实施例中，第一种极片为具有绝缘层的正极片，第二种极片为具有绝缘层的负极片，正极片与负极片之间通过绝缘层隔离，以防止发生短路。
在本申请的另一些实施例中，第一种极片为具有绝缘层的负极片，第二种极片为具有绝缘层的正极片，正极片与负极片之间通过绝缘层隔离，以防止发生短路。
在本申请的另一些实施例中，第一种极片和第二种极片也可以为不具有绝缘层的极片，极性相反的极片之间通过隔膜隔离，以防止发生短路。
在本申请的一些实施例中，卷绕组件11包括卷芯112，卷芯112用于将多片第一种极片和至少一片第二种极片卷绕。
在本申请的另一些实施例中，卷绕组件11包括切换装置111，卷芯112设于切换装置111,切换装置111用于使卷芯112在上料工位和下料工位之间切换。卷芯112用于在其对应的上料工位将该上料工位所对应的多片第一种极片和至少一片第二种极片卷绕形成具有卷绕结构的电极组件。下料工位可以指从卷芯112上卸载电极组件的工位，也可以指电极组件卷绕完成后还要进行其他工序的下一工位，其他工序可以为贴胶等工序。
例如：切换装置111上设置两个卷芯112，其中一个卷芯112对应位于上料工位A，另一个卷芯112对应位于下料工位B。切换装置111上卷芯112的数量不限可根据实际需求添加。
在本申请的另一些实施例中，该制备电极组件的设备包括至少一个张力机构18，张力机构18用于调整第一种极片和/第二种极片的张紧力。
如图2所示，在本申请的另一些实施例中，制备电极组件的设备包括至少一个第一种复合机构101，第一种复合机构101用于将至少一片第一种极片与至少一片第二种极片进行复合形成第一种复合极片，卷绕组件11用于将所有的第一种复合极片进行卷绕。
如图3所示，在本申请的再一些实施例中，制备电极组件的设备包括至少一个第二种复合机构102，第二种复合机构102用于将所有的第一种极片和所有的第二种极片进行复合形成第二种复合极片，卷绕组件11用于将第二种复合极片进行卷绕。
如图4所示，制备电极组件的设备还包括多个隔膜放卷装置14，多个隔膜放卷装置14用于向卷绕组件11提供多片隔膜，隔膜用于隔离第一种极片和第二种极片，以防止短路。
每个电极组件包括沿垂直于卷绕结构的卷绕轴线方向叠加的至少多片第一种极片、至少一片第二种极片和多片隔膜，其中，相邻第一种极片与第二种极片之间通过至少一片隔膜隔离。
在本申请的另一实施例中，多个第一种极片放卷装置12、至少一个第二种极片放卷装置13和多个隔膜放卷装置14围绕卷绕组件11四周分布，使得各自提供的极片和隔膜在进入卷绕组件11之前不缠绕。
在本申请的另一实施例中，多片第一种极片、至少一片第二种极片和多片隔膜叠加后，沿长条方向卷绕即可得到具有卷绕结构的电极组件，该卷绕结构具有卷绕轴线，多片第一种极片、至少一片第二种极片和多片隔膜叠加的叠加面与该卷绕轴线基本平 行。
电极组件的多片第一种极片和至少一片第二种极片叠加时，任意相邻的一片第一种极片和一片第二种极片之间还设有隔膜，用于将该相邻的第一种极片和第二种极片隔开以达到不相互短路的目的。
在本申请的另一实施例中，不同极性的极片相邻，即第一种极片和第二种极片相邻，是指该第一种极片和第二种极片之间没有其它极片但有至少一层隔膜，例如，该第一种极片和第二种极片之间没有其它第一种极片或第二种极片，也可以理解为该第一种极片和第二种极片之间最直接紧靠相邻，例如，以一种极性极片(例如，正极片)为基础，该极性极片与该极性极片相邻的第一层不同极性的极片(例如，负极片)称为相邻的极片。
不论第一种极片和第二种极片如何叠加，相邻的第一种极片和第二种极片之间均设有至少一层隔膜。
在本申请的另一实施例中，卷绕组件11包括卷芯112，卷芯112用于将多片第一种极片、至少一片第二种极片和多片隔膜卷绕。
在本申请的另一实施例中，卷绕组件11包括切换装置111，卷芯112设于切换装置111,切换装置111用于使卷芯112在上料工位和下料工位之间切换。卷芯112用于在其对应的上料工位A将该上料工位A所对应的多片第一种极片、至少一片第二种极片和多片隔膜卷绕形成具有卷绕结构的电极组件。
例如，制备电极组件的设备包括一个上料工位A和一个下料工位B，切换装置111上设置至少一个卷芯112，切换装置111将该至少一个卷芯112中的一个卷芯112移动到上料工位A，则该上料工位A对应的卷芯112可以将该上料工位A对应的多个第一种极片放卷装置12提供的多片第一种极片、至少一个第二种极片放卷装置13提供的至少一片第二种极片和多个隔膜放卷装置14提供的多片隔膜进行卷绕，以形成具有卷绕结构的电极组件。卷绕完成后，切换装置111将具有电极组件的卷芯112移动到下料工位B以便电极组件的下料。这里的下料是指将具有电极组件的卷芯112运送至下一工序，下一工序可以是卷绕过程中的下一工序，例如贴胶，也可以是卷绕之后的下一工序，例如热压。如果切换装置111还有至少一个卷芯112，则将另一个卷芯112移动到上料工位A继续形成具有卷绕结构的另一个电极组件。
例如，如图4所示，切换装置111上设置两个卷芯112，与卷芯112相对应的位置设置有一个上料工位A和一个下料工位B。切换装置111包括转盘，该两个卷芯112 沿切换装置111的圆周分别，该两个卷芯112以切换装置111的转轴中心对称分布于切换装置111的一条直径上。
如图5所示，该两个卷芯112以切换装置111转轴中心分布于切换装置111的不同的直径上，切换装置111移动其中一个卷芯112到上料工位A以进行该上料工位A对应的第一种极片、第二种极片和隔膜的卷绕以形成具有卷绕结构的电极组件，当卷绕完成后，切换装置111继续转动，将具有电极组件的卷芯112移动到下料工位B以便电极组件的下料，而将另一个卷芯112移动到上料工位A用于形成具有卷绕结构的另一个电极组件。
例如，如图6所示，切换装置111包括转盘，切换装置111上设置三个卷芯112，该三个卷芯112沿切换装置111的圆周分别，例如，该三个卷芯112等角地分布于切换装置111的圆周上，切换装置111移动其中一个卷芯112到上料工位A以进行该上料工位A对应的第一种极片、第二种极片和隔膜的卷绕以形成具有卷绕结构的电极组件，当卷绕完成后，切换装置111继续转动，将具有电极组件的卷芯112移动到贴胶工位B’，可贴收尾胶带，贴收尾胶带后的具有电机组件的卷芯112移动至卸料工位C，以便电极组件的取下。下料工位包括贴胶工位B’和卸料工位C。
在将具有电极组件的卷芯112移动至贴胶工位B’的同时，将另一个卷芯112移动到上料工位A，用于形成具有卷绕结构的另一个电极组件，而最后一个卷芯112处于卸料工位C，且作为备用卷芯112等待切换装置111的旋转以进入上料工位A。
也就是说，最后一个卷芯112所处的工位可以作为备选工位，在卷芯112上具有电极组件的情况下也可作为卸料工位C。即切换装置111转动将具有电极组件的卷芯112移动到该卸料工位C进行卸料，也就是卸下电极组件，具有电极组件的卷芯112在卸料工位C卸料后，可再在卸料工位C放置空的卷芯112，等待进入上料工位A。
在本申请的另一实施例中，与卷芯112相对应的位置可以设置两个或两个以上的上料工位A，例如，如图7所示，与卷芯112相对应的位置设置两个上料工位A，则切换装置111可以同时将与上料工位A数量相同的卷芯112移动到各自的上料工位A，每个上料工位A对应的卷芯112进行卷绕形成与上料工位A数量相同的具有卷绕结构的电极组件，则每个上料工位A对应由多个第一种极片放卷装置12、至少一个第二种极片放卷装置13和多个隔膜放卷装置14组成的一套上料系统。本实施例不限制下料工位B的数量，例如，下料工位B的数量可以为一个，也可以与上料工位A的数量相同。
在本申请的另一实施例中，如图8所示，制备电极组件的设备还包括第一切断件151和第二切断件152，第一切断件151用于当卷芯112卷绕电极组件达到预定圈数时，切断多片隔膜中的至少一片且保留至少一片隔膜；第二切断件152用于当卷芯112在下料工位B(可以在工位贴胶)时，切断保留的至少一片隔膜。
在本申请另一实施例中，每个上料工位A对应一个第一切断件151和一个第二切断件152。例如，可以针对每个上料工位A设置一个第一切断件151和一个第二切断件152，当任意一个上料工位A(例如，第一上料工位)对应的卷芯112将其卷绕的电极组件中的极片卷绕至预定圈数时，该上料工位A(例如，第一上料工位)对应的第一切断件151在保留至少一片隔膜的基础上切断进入该上料工位A(例如，第一上料工位)的其它隔膜，例如，保留该电极组件的卷绕结构的最外层的隔膜，而切断其它所有隔膜。此处的卷绕至预定圈数是指第一种极片或第二种极片卷绕至卷芯的长度达到电极组件需要的长度。
第二切断件152用于在保留的至少一片隔膜在上料工位A(例如，第一上料工位)重新上料成功后切断位于上料工位A(例如，第一上料工位)与下料工位B(例如，第一下料工位)之间的保留的至少一片隔膜。例如，切换装置111将第一上料工位对应的卷芯112转移到第一下料工位时，由于该第一上料工位上的卷芯112的电极组件还保留至少一片隔膜，利用该保留的隔膜与其相邻的第一种极片、第二种极片或隔膜之间摩擦作用以及第一种极片与隔膜之间和第二种极片与隔膜之间的摩擦作用，保留的隔膜可以带动所有第一种极片、第二种极片和其它隔膜在上料工位A进行上料，在上料完成后，第二切断件152切断位于第一上料工位与第一下料工位之间的保留的至少一片隔膜，以便移入上料工位A的卷芯112卷绕一个新的电极组件。此处的上料工位上料完成是指被切断的其它隔膜被完全卷绕至卷芯，卷芯112随切换装置移动至下料工位，此时，保留的一片隔膜重新上料成功，即保留的一片隔膜的位于上料工位的部位被固定于位于上料工位处的卷芯。在保留的至少一片隔膜的位于上料工位与下料工位之间的部位被第二切断件152切断后，保留的一片隔膜的尾端长于其对应的第一种极片或第二种极片的尾端，位于下料工位的卷芯112继续转动，以将保留的一片隔膜与其对应的第一种极片或第二种极片卷绕至卷绕结构的最外层，形成电极组件。
在本申请的另一实施例中，保留的至少一片隔膜包括从电极组件的最外层隔膜开始计算的至少一层隔膜，例如，电极组件的隔膜在卷绕结构中从外向内依次可以称为：最外层(即第一外层)隔膜、第二外层隔膜、第三外层隔膜、…、第n外层隔膜，其 中，n与用于隔开第一种极片和第二种极片的隔膜数量相关，例如，n大于等于第一种极片和第二种极片的数量之和，最外层隔膜是指卷绕结构的最外圈极片(一般是第二种极片)的外侧所附的隔膜，最外圈极片既可以是卷绕结构展平后最外层的极片，也可以是卷绕结构中任意一片极片在其它极片卷绕结束后继续卷绕形成于卷绕结构最外圈的极片。
在本申请另一实施例中，第一种极片和第二种极片具有绝缘层无需隔膜，多片第一种极片和至少一片第二种极片进行卷绕时，第一切断件151用于当所述卷芯卷绕所述电极组件达到预定圈数时，切断多片第一种极片和至少一片第二种极片中的至少一片且保留至少一片第一种极片或第二种极片。
第二切断件152用于当卷芯在下料工位时，切断保留的至少一片第一种极片或第二种极片。
在本申请的另一实施例中，如图9所示，每个卷芯112的卷绕表面上设有至少一个负压口1121，用于吸附多片隔膜中的至少一片隔膜的卷绕起始段。例如，一般有两个或两个以上的负压口1121，至少一个负压口1121用于吸附用于其所属卷芯112进行上料的隔膜。卷绕起始段指的是开始卷绕时，隔膜的头部。
在本申请的另一些实施例中，第一种极片和第二种极片具有绝缘层无需隔膜，多片第一种极片和至少一片第二种极片进行卷绕时，卷芯112的卷绕表面设置的至少一个负压口1121，用于吸附多片第一种极片或至少一片第二种极片中的至少一片。
在本申请的另一实施例中，负压口1121包括卷芯112的卷绕表面上设置的凹坑或贯穿孔，凹坑或贯穿孔的大小和形状，本实施例并不限定，例如，可以为圆形凹坑或贯穿孔，或者，可以为三角形凹坑或或贯穿孔，或者，可以为四方形凹坑或贯穿孔。
在本申请的另一实施例中，负压口1121为三角形、圆形、四方形或不规则形状。
在本申请的另一实施例中，负压口1121在卷芯112的卷绕表面阵列分布。负压口1121阵列分布保证了隔膜受到的吸附力均匀，保证隔膜或极片(第一种极片或第二种极片)卷绕时的平整性。
在本申请的另一实施例中，如图10所示，制备电极组件的设备还包括压辊161和喷吹机构162，压辊161用于将多片隔膜中的至少一片隔膜的卷绕起始段压向卷芯；喷吹机构162用于将卷绕起始段的端部吹贴于卷芯表面，以便卷芯卷绕该卷绕起始段,以带动多片第一种极片、至少一片第二种极片和多片隔膜卷绕。每个上料工位A对应一个压辊161和一个喷吹机构162，压辊161用于将其对应的上料工位A(例如，第 一上料工位)的多片隔膜中的至少一片隔膜的卷绕起始段压向于该对应上料工位A(例如，第一上料工位)对应的卷芯112，喷吹机构162用于将至少一片隔膜的卷绕起始段的端部吹贴于该对应上料工位A(例如，第一上料工位)对应的卷芯112的卷绕表面以便对应上料工位A(例如，第一上料工位)上的卷芯112的卷绕起始段进行卷绕,以带动对应上料工位A(例如，第一上料工位)对应的多片第一种极片、至少一片第二种极片和多片隔膜卷绕形成具有卷绕结构的电极组件。
在本申请的另一些实施例中，如图10所示的，第一种极片和第二种极片具有绝缘层无需隔膜，多片第一种极片和至少一片第二种极片进行卷绕时，压辊161用于将多片第一种极片和至少一片第二种中的至少一片的卷绕起始段压向卷芯；喷吹机构162用于将卷绕起始段的端部吹贴于卷芯表面，以便卷芯卷绕该卷绕起始段,以带动多片第一种极片、至少一片第二种极片卷绕。
在本申请的另一实施例中，如图11所示，制备电极组件的设备还包括上料组件17。每个上料工位A可以对应一个上料组件17。上料组件17用于将进入上料组件17对应的上料工位A(例如，第一上料工位)的至少一片隔膜的卷绕起始段送入对应上料工位A(例如，第一上料工位)对应的卷芯112的卷绕表面。上料组件17还用于在电极组件中的极片卷绕至预定圈数且隔膜被切断后，夹住隔膜的末段，且夹住下一个预形成的电极组件在上料组件17处的隔膜的卷绕起始段。
如图12所示，上料组件17包括第一上料组件171，第一上料组件171用于将至少一片隔膜的卷绕起始段送入卷芯112。第一上料件171用于将进入第一上料组件171对应的上料工位A(例如，第一上料工位)的至少一片隔膜的卷绕起始段送入对应上料工位A(例如，第一上料工位)对应的卷芯112的卷绕表面。第一上料件171还用于在电极组件中的极片卷绕至预定圈数且隔膜被切断后，夹住隔膜的末段。
上料组件17还包括第二上料件172，第二上料件172用于在电极组件中的极片卷绕至预定圈数且隔膜被切断后，夹住下一个预形成的电极组件在上料组件17处的隔膜的卷绕起始段。第一切断件151设于第一上料件171与和第二上料件172之间。
例如，如图12所示，上料组件17包括第一上料组件17和第二上料件172，第一切断件151设置于第一上料件171与和第二上料件172之间。第一上料件171用于夹持住其所对应的上料工位的隔膜的卷绕起始段，且将卷绕起始段送入卷芯112，且在第一切断件151切断隔膜后，第一上料件171夹持该隔膜的卷绕末段，将该隔膜的卷绕末段移动至卷芯112，第二上料件172用于夹持住在后预形成的电极组件的隔膜的 卷绕起始段。
在本申请的另一实施例中，第一种极片和第二种极片具有绝缘层无需隔膜，多片第一种极片和至少一片第二种极片进行卷绕时，第一上料件171用于夹持住多片第一种极片和至少一片第二种极片中至少一片的卷绕起始段，且将卷绕起始段送入卷芯112。第二上料件172用于当切断多片第一种极片和至少一片第二种中的至少一片第二种极片或第二种极片时，夹住被切断的该至少一片第一种极片或第二种极片。
在本申请的另一实施例中，每个上料组件17位于其对应上料工位A对应的卷芯112的下方，用于将隔膜自下而上送至对应上料工位A对应的卷芯112。例如，上料组件17位于第一上料工位对应的卷芯112的下方，上料组件17用于将隔膜自下而上送至第一上料工位对应的卷芯112。
在本申请的另一实施例中，如图13所示，制备电极组件的设备还包括多个第一复合机构181和至少一个第二复合机构182，多个第一复合机构181中的每个第一复合机构181用于将多片第一种极片中的一片第一种极片和多片隔膜中的一片隔膜复合成第一复合极片。
至少一个第二复合机构182中的每个第二复合机构182用于将至少一片第二种极片中的一片第二种极片和多片隔膜中的另一片隔膜复合成第二复合极片。
卷绕组件11用于将所有的第一复合极片和所有的第二复合极片卷绕形成具有卷绕结构的电极组件。
在本申请的另一实施例中，如图14所示，制备电极组件的设备还包括至少一个第三复合机构183，至少一个第三复合机构183中的每个第三复合机构183用于将多片第一种极片中的一片第一种极片、至少一片第二种极片中的一片第二种极片和多片隔膜中的两片隔膜复合成第三复合极片，卷绕组件11用于将所有的第三复合极片卷绕形成具有卷绕结构的电极组件。
在本申请的另一实施例中，如图15所示，制备电极组件的设备还包括第四复合机构184，第四复合机构184用于将多片第一种极片、至少一片第二种极片和多片隔膜复合成第四复合极片，卷绕组件11用于将第四复合极片卷绕形成具有卷绕结构的电极组件。
根据上述描述的制备电极组件的设备，由于制备电极组件的设备是将多片第一种极片、至少一片第二种极片和多片隔膜进行卷绕得到具有卷绕结构的电极组件，即在卷绕组件11上同时卷绕多片第一种极片和多片第二种极片，卷绕组件11卷绕一圈得 到的极片长度，相当于在卷绕组件11卷绕一片第一种极时旋转多圈的长度，因此卷绕圈数减少，从而提高了电极组件的卷绕效率。其中，第二种极片可以设计成一片第二种极片对应多片第一种极片。
另外，相对于为达到相同能量，使用长度等于多片第一种极片长度之和的单片第一种极片和长度等于至少一片第二种极片长度之和的单片第二种极片进行卷绕得到的电极组件，本实施例制备的电极组件，由于是多片第一种极片、至少一片第二种极片和多片隔膜叠加卷绕形成的电极组件，即本实施例制备的电极组件相当于将长度等于多片第一种极片长度之和的单片第一种极片和长度等于至少一片第二种极片长度之和的单片第二种极片分别分段为多片进行并联卷绕得到，本实施例制备的电极组件内部同一极性的极片具有多片，电极组件的内阻更小，从而降低电极组件在使用过程中的发热量，提高电极组件的性能。
另外，相对于为达到相同能量，使用长度等于多片第一种极片长度之和的单片第一种极片和长度等于至少一片第二种极片长度之和的单片第二种极片进行卷绕，卷绕时，需控制同极性的多个极耳对齐，以保证后续电极组件组装成电池后的电连接。为了保证极耳的对齐，极耳的位置根据卷绕时极耳对应的卷绕半径计算得到，因此卷绕圈数越多，卷绕半径变化越大，极耳之间位置越难精准计算，极耳的错位(即极耳的不对齐程度)越难控制。本实施例的电极组件中，极片长度缩短，其卷绕的圈数减少，因此可以提高卷绕过程中极耳错位的控制能力，改善了电极组件的品质。
为描述简洁，下述实施例以一个卷绕组件、两个第一种极片放卷装置、两个第二种极片放卷装置为例进行说明。
如图16所示，为本申请第一实施例提供的一种制备电极组件的设备的结构示意图，在第一实施例中，制备电极组件的设备包括卷绕组件101、两个第一种极片放卷装置102、两个第二种极片放卷装置103。
两个第一种极片放卷装置102用于向卷绕组件101提供两片第一种极片。
两个第二种极片放卷装置103用于向卷绕组件101提供两片第二种极片。
卷绕组件101用于将两片第一种极片和两片第二种极片叠加以及卷绕成具有卷绕结构的电极组件。电极组件包括沿垂直于卷绕结构的卷绕轴线方向叠加的一片第一种极片、一片第二种极片、另一片第一种极片和另一片第二种极片。
第一种极片与第二种极片的极性相反，且均自带绝缘层，第一种极片与第二种极 片之间通过绝缘层隔离，以防止短路。
例如：第一种极片为带绝缘层的正极片，第二种极片为带绝缘层的负极片。或者，第一种极片为带绝缘层的负极片，第二种极片为带绝缘层的正极片。
卷绕组件101包括切换装置1011,切换装置1011上设有三个卷芯，为进行区分，分别定义为第一卷芯1012、第二卷芯1013和第三卷芯1014，第一卷芯1012、第二卷芯1013和第三卷芯1014沿切换装置1011的转动轴线间隔设置。沿切换装置1011的周向，设有第一工位、第二工位和第三工位。在第一卷芯1012位于第一工位时，第二卷芯1013位于第二工位，第三卷芯1014位于第三工位，切换装置1011转动，第一卷芯1012位于第二工位时，第二卷芯1013位于第三工位，第三卷芯1014位于第一工位，切换装置1011转动，第一卷芯1012位于第三工位时，第二卷芯1013位于第一工位，第三卷芯1014位于第二工位，以此循环。
设定第一工位为上料工位，第二工位为贴胶工位，第三工位为卸料工位。第二工位和第三工位可以合并为一个工位为下料工位。
上料工位对应的卷芯将两个第一种极片和两个第二种极片进行卷绕，以形成具有卷绕结构的电极组件。切换装置1011将具有电极组件的卷芯移动到贴胶工位，贴收尾胶带，最后，切换装置1011将具有电极组件的卷芯移动至卸料工位，以便电极组件的卸料。
在第一实施例中，制备电极组件的设备还包括第一切断件104和第二切断件105。第一切断件104设于上料工位，用于当卷芯卷绕电极组件达到预定圈数时，在保留至少一片第一种极片或第二种极片的基础上切断其它的第一种极片和第二种极片。
第二切断件105设于第一工位和第二工位之间，第二切断件105用于当卷芯在第二工位时，切断保留的至少一片第一种极片或第二种极片。
在第一实施例中，卷芯112的卷绕表面可以设置至少一个负压口，用于吸附多片第一种极片或至少一片第二种极片中的至少一片
在第一实施例中，制备电极组件的设备还可以包括压辊和喷吹机构，两片第一种极片和两片第二种极片进行卷绕时，压辊用于将两片第一种极片和两片第二种极片中的至少一片的卷绕起始段压向卷芯；喷吹机构用于将卷绕起始段的端部吹贴于卷芯表面，以便卷芯卷绕该卷绕起始段,以带动其它第一种极片和第二种极片卷绕。
在第一实施例中，制备电极组件的设备还包括备胶机构106和贴胶机构107。备胶机构106用于向贴胶机构107提供收尾胶带。贴胶机构107设于上料工位的下游， 也就是第二工位，用于在卷绕完成的卷绕结构上贴收尾胶带。
下述实施例以一个卷绕组件、两个第一种极片放卷装置、两个第二种极片放卷装置和四个隔膜放卷装置为例进行说明。
如图17所示，为本申请第二实施例提供的一种制备电极组件的设备的结构示意图，在第二实施例中，制备电极组件的设备包括卷绕组件201、两个第一种极片放卷装置202、两个第二种极片放卷装置203、四个隔膜放卷装置204。
两个第一种极片放卷装置202用于向卷绕组件201提供两片第一种极片a1和a2。
两个第二种极片放卷装置203用于向卷绕组件201提供两片第二种极片b1和b2。
四个隔膜放卷装置204用于向卷绕组件201提供四片隔膜c1、c2、c3和c4。
卷绕组件201用于将第一片隔膜c1与一片第一种极片a1的配对、第二片隔膜c2与一片第二种极片b1的配对、第三片隔膜c3与另一片第一种极片a2的配对、第四片隔膜c4与另一片第二种极片b2的配对叠加以及卷绕成具有卷绕结构的电极组件。电极组件包括沿垂直于卷绕结构的卷绕轴线方向依次交替叠加的第一片隔膜c1、一片第一种极片a1、第二片隔膜c2、一片第二种极片b1、第三片隔膜c3、另一片第一种极片a2、第四片隔膜c4和另一片第二种极片b2。也就是说，相邻第一种极片与第二种极片之间通过一片隔膜隔离。
如图17和图18所示，卷绕组件201包括切换装置210,切换装置210上设有三个卷芯，为进行区分，分别定义为第一卷芯211、第二卷芯212和第三卷芯213，沿切换装置210的转向，设有第一工位、第二工位和第三工位。在第一卷芯211位于第一工位时，第二卷芯212位于第二工位，第三卷芯213位于第三工位，切换装置210转动，第一卷芯211位于第二工位时，第二卷芯212位于第三工位，第三卷芯213位于第一工位，切换装置210转动，第一卷芯211位于第三工位时，第二卷芯212位于第一工位，第三卷芯213位于第二工位，以此循环。
设定第一工位为上料工位，第二工位为贴胶工位，第三工位为卸料工位。贴胶工位和卸料工位可以合并为下料工位。也就是下料工位包括贴胶工位和卸料工位。
第一卷芯211、第二卷芯212和第三卷芯213沿切换装置210的转动轴线间隔设置。
当然，在切换装置210上也可以设置四个以上卷芯，各卷芯随切换装置210的转动依次在上料工位和下料工位作业，提高作业效率。
在该实施例中，制备电极组件的设备还包括第一切断件221和第二切断件222。
第一切断件221设于切换装置210的外侧对应于第一工位的位置，对应于第一切断件221，设有刀座223，第一切断件221与刀座223配合，切断隔膜。第二切断件222设于切换装置210的外侧，对应于第一工位和第二工位之间。
在第一卷芯211位于第一工位时，接收两片第一种极片、两片第二种极片和四片隔膜，且进行卷绕，在卷绕至预设长度后，在保留一片隔膜的基础上通过第一切断件221切断进入第一卷芯211的其它三片隔膜。在第一卷芯211位于第二工位时，通过第二切断件222切断保留的一片隔膜。
第一卷芯211继续转动，以将保留的一片隔膜卷绕为卷绕结构的最外层。可选地，保留的一片隔膜为电极组件的最内层隔膜，将电极组件的最内层隔膜作为保留的隔膜最后卷绕形成电极组件的最外层，可以避免保留的隔膜在包围其它隔膜以及对应的第一种极片和第二种极片时，出现端部台阶的现象造成电极组件应用于电池时产生析锂的问题。
在该实施例中，制备电极组件的设备还包括第一组上料组件231、第二组上料组件232、第三组上料组件233和第四组上料组件234。
第一组上料组件231将第一片隔膜c1卷绕起始段及一片第一种极片a1的卷绕起始段送入上料工位对应的第一卷芯211。
第二组上料组件232将第二片隔膜c2的卷绕起始段及一片第二种极片b1的卷绕起始段送入上料工位对应的第一卷芯211。
第三组上料组件233将第三片隔膜c3与的卷绕起始段及另一片第一种极片a2的卷绕起始段送入上料工位对应的第一卷芯211。
第四组上料组件234将第四片隔膜c4的卷绕起始段及另一片第二种极片b2的卷绕起始段送入上料工位对应的第一卷芯211。
在该实施例中，制备电极组件的设备还包括导向板240，导向板240设于卷绕组件201的上料工位，导向板240被配置为将第一种极片、第二种极片和隔膜导向至卷绕组件201的上料工位。
在该实施例中，制备电极组件的设备还包括备胶机构251和贴胶机构252。贴胶机构252设于上料工位的下游，对应下料工位的贴胶工位，用于在卷绕完成的卷绕结构上贴收尾胶带，备胶机构251设于贴胶工位的下游，也就是第三工位，用于向贴胶机构252提供收尾胶带。
第一卷芯211随切换装置210移动位于下料工位时，贴胶机构252将收尾胶带贴合于卷绕结构，电极组件制备完成。
第二卷芯212和第三卷芯213的工作过程与第一卷芯211的工作过程一致，在此不再赘述。
如图19所示，第一组上料组件231、第二组上料组件232、第三组上料组件233和第四组上料组件234均包括相互对应配合工作的第一上料件2301和第二上料件2302，每个第一上料件2301与其对应的第二上料件2302之间设有一第一切断件221，与第一切断件221相对应设有刀座223，第一切断件221与刀座223配合切断隔膜。
第一上料件2301用于夹持住其所对应的上料工位的隔膜的卷绕起始段，且将卷绕起始段送入第一卷芯211，且在第一切断件221切断隔膜后，第一上料件2301夹持该隔膜在前预形成的电极组件的末端，将该隔膜的末端移动至第一卷芯211，第二上料件2302用于夹持住在后预形成的电极组件的隔膜的卷绕起始段。
第一卷芯211、第二卷芯212和第三卷芯213的表面均分布多个细小真空负压口214。各负压口214用于吸附隔膜，利于顺利入料。
如图20所示，为本申请第三实施例提供的一种制备电极组件的设备的结构示意图，在第三实施例中，制备电极组件的设备包括卷绕组件301、两个第一种极片放卷装置302、两个第二种极片放卷装置303、四个隔膜放卷装置304。
其中，卷绕组件301、两个第一种极片放卷装置302、两个第二种极片放卷装置303和四个隔膜放卷装置304的作用与第二实施例中的卷绕组件201、两个第一种极片放卷装置202、两个第二种极片放卷装置203、四个隔膜放卷装置204相类似，不再赘述。
第三实施例与第二实施例的区别至少可以如下所述。
在第三实施例中，制备电极组件的设备还包括两个第一复合机构311和两个第二复合机构312。
两个第一复合机构311中的每个第一复合机构311用于将两片第一种极片中的一个第一种极片和四片隔膜中的一个隔膜复合成第一复合极片。
第一复合机构311和可以通过静电吸附、热压复合或贴胶复合等复合方式将第一种极片和隔膜进行复合连接。第一种极片和隔膜沿第一种极片的厚度方向层叠设置。
由于两个第一种极片放卷装置302提供两片第一种极片，四个隔膜放卷装置304 提供四片隔膜，每一片第一种极片与一片隔膜通过一个第一复合机构311进行复合，因此，能够形成两个第一复合极片。
两个第二复合机构312中的每个第二复合机构312用于将两片第二种极片中的一个第二种极片和四片隔膜中的另一个隔膜复合成第二复合极片。
第二复合机构312可以通过静电吸附、热压复合或贴胶复合等复合方式将第二种极片和隔膜进行复合连接。第二种极片和隔膜沿第二种极片的厚度方向层叠设置。
由于两个第二种极片放卷装置303提供两片第二种极片，四个隔膜放卷装置304提供四片隔膜，每一片第二种极片与一片隔膜通过一个第二复合机构312进行复合，因此，能够形成两个第二复合极片。
卷绕组件301用于将两个第一复合极片和两个第二复合极片卷绕形成卷绕结构。
卷绕组件301进行卷绕前，先通过第一复合机构311将第一种极片和隔膜进行复合，使第一种极片和隔膜相互连接形成一个整体的第一复合极片，通过第二复合机构312将第二种极片和隔膜进行复合，使第二种极片和隔膜相互连接形成一个整体的第二复合极片，然后将所有的第一复合极片和第二复合极片送入卷绕组件301进行卷绕。
一方面，第一种极片和第二种极片分别在其对应的隔膜的带动下进入卷绕组件301进行卷绕，相对于第一种极片、第二种极片和隔膜各自独立进入卷绕组件301进行卷绕的方式，卷绕组件301的上料工位的入料层数减少，避免多层入料造成的相互干扰，降低第一种极片、第二种极片和隔膜的对齐难度，降低第一种极片和第二种极片彼此不对齐的可能性，提高卷绕对齐精度，操作方便，提高效率。这里的对齐指的是第一种极片和第二种极片以及隔膜沿各自的宽度方向彼此对齐。
另一方面，第一种极片和第二种极片分别在其对应的隔膜的带动下进入卷绕组件301进行卷绕，可以降低第一种极片和第二种极片进入卷绕工序时出现打折或褶皱的可能性，有效提高电极组件的良品率。
再一方面，第一种极片和第二种极片分别在其对应的隔膜的带动下进入卷绕组件301进行卷绕，卷绕组件301的上料工位的入料层数减少，对应的，卷绕组件301的上料工位处的对各第一种极片、第二种极片以及隔膜进行入卷引导的入卷辅助机构的数量可以减少，简化了卷绕组件301的整体结构，便于有足够的空间设置各层入料的辅助机构，又有利于提高卷绕工作效率。
制备电极组件的设备包括四个加热件320。加热件320用于对隔膜放卷装置304提供的隔膜进行加热。
在隔膜送入复合机构之前，先通过加热件320对隔膜进行加热，使隔膜发生物理或化学变化，再将隔膜与第一种极片进行复合，利于隔膜与第一种极片更好地贴合，提高形成的第一复合极片的平整度，降低第一种极片与其对应的隔膜分离的几率。
四个加热件320中的一个加热件320设于一个隔膜放卷装置304与一个第一复合机构311之间。四个加热件320的一个加热件320设于一个隔膜放卷装置23与一个第二复合机构312之间。加热件320用于对隔膜放卷装置23提供的隔膜进行加热。
在隔膜送入第一复合机构311和第二复合机构312之前，先通过加热件320对隔膜进行加热，使隔膜发生物理或化学变化，再将隔膜与第二种极片进行复合，利于隔膜与第二种极片更好地贴合，提高形成的第二复合极片的平整度，降低第二种极片与其对应的隔膜分离的几率。
在第三实施例中，制备电极组件的设备还包括第三切断件331，第三切断件331设于第一种极片放卷装置302与第一复合机构311之间，第三切断件331被配置为对第一种极片放卷装置302提供的第一种极片进行切断。第一种极片被切断的工位位于第一复合机构311的上游，远离第一复合机构311，而第一种极片与隔膜通过第一复合机构311进行复合的工位远离卷绕组件301进行卷绕的工位，因此，在第一复合机构311的上游对第一种极片进行切断，可进一步有效降低第一种极片被切断过程所产生的粉尘进入卷绕组件301的可能，以及降低卷绕组件301中存在粉尘刺破隔膜导致第一种极片与第二种极片发生短路的风险。
在第三实施例中，制备电极组件的设备还包括第四切断件332，第四切断件332设于第二种极片放卷装置303与第二复合机构312之间，被配置为对第二种极片放卷装置303提供的第二种极片进行切断。第二种极片被切断的工位位于第二复合机构312的上游，远离第二复合机构312，而第二种极片与隔膜通过第二复合机构312进行复合的工位远离卷绕组件301进行卷绕的工位，因此，在第二复合机构312的上游对第二种极片进行切断，可进一步有效降低第二种极片被切断过程所产生的粉尘进入卷绕组件301的可能，以及降低卷绕组件301中存在粉尘刺破隔膜导致第一种极片与第二种极片发生短路的风险。
如图21所示，在第三实施例中，卷绕组件301包括转盘3011和三个卷芯3012，制备电极组件的设备还包括第一切断件351、第二切断件352和以及两个上料组件340。
第一切断件351用于切断三片隔膜，第二切断件352用于切断一片隔膜。其中一个上料组件340用于夹持一片隔膜，另一个上料组件340用于夹持另外三片隔膜。
上料组件340用于将进入上料组件340对应的上料工位的隔膜的卷绕起始段送入上料工位对应的卷芯3012，自动化程度高。
上料组件340还用于在卷绕结构卷绕至预定圈数且第一片隔膜被切断后，夹住第一片隔膜的末段和夹住下一个预形成的电极组件在上料组件340的隔膜的卷绕起始段。
上述实施例中，通过上料组件340夹住隔膜的卷绕起始段或卷绕末段送至卷芯3012，可以为隔膜的卷绕起始段或末段提供可控的张紧力，降低因卷绕起始段或末段处于自由悬空状态而导致在卷绕起始段或末段进入卷芯3012时容易发生移位、弯曲打折等问题的可能性，提高电极组件的卷绕质量。
如图22所示，可选地，制备电极组件的设备包括对应于每个上料工位的压辊361和喷吹机构362，压辊361用于将四片隔膜的卷绕起始段压向与压辊361对应的上料工位对应的卷芯3012，喷吹机构362用于将四片隔膜的卷绕起始段的端部吹贴于卷芯3012，卷芯3012卷绕隔膜的卷绕起始段以带动两个第一种极片和两个第二种极片形成卷绕结构。
如图23所示，为本申请第四实施例提供的一种制备电极组件的设备的结构示意图，在第四实施例中，制备电极组件的设备包括卷绕组件401、两个第一种极片放卷装置402、两个第二种极片放卷装置403、四个隔膜放卷装置404。
其中，卷绕组件401、两个第一种极片放卷装置402、两个第二种极片放卷装置403和四个隔膜放卷装置404的作用与第三实施例中的卷绕组件301、两个第一种极片放卷装置302、两个第二种极片放卷装置303和四个隔膜放卷装置304相类似，不再赘述。
第四实施例与第三实施例的区别至少可以如下所述。
制备电极组件的设备还包括两个第一复合机构411、两个第二复合机构412和两个第三复合机构413。
两个第一复合机构411中的每个第一复合机构411用于将两片第一种极片中的一个第一种极片和四片隔膜中的一个隔膜复合成第一复合极片。
两个第二复合机构412中的每个第二复合机构412用于将两片第二种极片中的一个第二种极片和四片隔膜中的另一个隔膜复合成第二复合极片。
两个第三复合机构43中的每一个第三复合机构43用于将一个第一复合极片和一个第二复合极片复合形成第三复合极片，卷绕组件401用于将各第三复合极片卷绕形 成卷绕结构。
在第四实施例中，制备电极组件的设备还包括第三切断件421，第三切断件421设于第一种极片放卷装置402与第一复合机构411之间，第三切断件421被配置为对第一种极片放卷装置402提供的第一种极片进行切断。第一种极片被切断的工位位于第一复合机构411的上游，远离第一复合机构411，而第一种极片与隔膜通过第一复合机构411进行复合的工位远离卷绕组件401进行卷绕的工位，因此，在第一复合机构411的上游对第一种极片进行切断，可进一步有效降低第一种极片被切断过程所产生的粉尘进入卷绕组件401的可能，以及降低卷绕组件401中存在粉尘刺破隔膜导致第一种极片与第二种极片发生短路的风险。
在第四实施例中，制备电极组件的设备还包括第四切断件422，第四切断件422设于第二种极片放卷装置403与第二复合机构412之间，被配置为对第二种极片放卷装置403提供的第二种极片进行切断。第二种极片被切断的工位位于第二复合机构412的上游，远离第二复合机构412，而第二种极片与隔膜通过第二复合机构412进行复合的工位远离卷绕组件401进行卷绕的工位，因此，在第二复合机构412的上游对第二种极片进行切断，可进一步有效降低第二种极片被切断过程所产生的粉尘进入卷绕组件401的可能，以及降低卷绕组件401中存在粉尘刺破隔膜导致第一种极片与第二种极片发生短路的风险。
在第四实施例中，制备电极组件的设备还包括加热件440，加热件440用于对隔膜进行加热。
如图24所示，为本申请第五实施例提供的一种制备电极组件的设备的结构示意图，在第五实施例中，制备电极组件的设备还包括卷绕组件501、两个第一种极片放卷装置502、两个第二种极片放卷装置503、四个隔膜放卷装置504、两个第四复合机构510和四个加热件520。
其中，卷绕组件501、两个第一种极片放卷装置502、两个第二种极片放卷装置503和四个隔膜放卷装置504的作用与第二实施例中的卷绕组件201、两个第一种极片放卷装置202、两个第二种极片放卷装置203和四个隔膜放卷装置204相类似，不再赘述。
第四复合机构510用于将两片第一种极片中的一片第一种极片、两片第二种极片中的一片第二种极片和多片隔膜中的两片隔膜复合成第四复合极片，卷绕组件501用 于将所有的第四复合极片卷绕形成卷绕结构。每个加热件520设于一个隔膜放卷装置504与第四复合机构510之间，用于对隔膜加热。
制备电极组件的设备包括第三切断件531和第四切断件532。第三切断件531设于第一种极片放卷装置502与第四复合机构510之间，第三切断件531被配置为对第一种极片放卷装置502提供的第一种极片进行切断。第四切断件532设于第二种极片放卷装置505与第四复合机构510之间，被配置为对第二种极片放卷装置505提供的第二种极片进行切断。
如图25所示，一些实施例提供了一种电极组件的制备方法，其采用的设备可以参考图1至24，且电极组件的制备方法可参考前面所有设备实施例的工作过程。该电极组件的制备方法包括：
提供多片第一种极片；
提供至少一片第二种极片，第一种极片和第二种极片极性相反；
将多片第一种极片和至少一片第二种极片进行卷绕，以形成电极组件。
电极组件的制备方法可以与前面所述制备电极组件的设备的使用工艺过程一致。
本申请提供的电极组件的制备方法以多片第一种极片和至少一片第二种极片进行卷绕得到具有卷绕结构的电极组件，即在卷绕组件上同时卷绕多片第一种极片和多片第二种极片，卷绕组件卷绕一圈得到的极片长度，相当于在卷绕组件卷绕一片第一种极片、一片第二种极片时旋转至少两圈的长度，因此卷绕圈数减少，从而提高了电极组件的卷绕效率。
另外，相对于为达到相同能量，使用长度等于多片第一种极片长度之和的单片第一种极片和长度等于至少一片第二种极片长度之和的单片第二种极片进行卷绕得到的电极组件，本实施例制备的电极组件，由于是多片第一种极片和至少一片第二种极片叠加卷绕形成的电极组件，即本实施例制备的电极组件相当于将长度等于多片第一种极片长度之和的单片第一种极片和长度等于至少一片第二种极片长度之和的单片第二种极片分别分段为多片进行并联卷绕得到，本实施例制备的电极组件内部同一极性的极片具有多片，电极组件的内阻更小，从而降低电极组件在使用过程中的发热量，提高电极组件的性能。
另外，相对于为达到相同能量，使用长度等于多片第一种极片长度之和的单片第一种极片和长度等于至少一片第二种极片长度之和的单片第二种极片进行卷绕时同 性极片上多个极耳的对齐，本实施例的电极组件中，多片同性极片上的极耳并列叠加对齐后再进行卷绕，而且极片长度缩短，其卷绕的圈数减少，因此，极耳的错位量减少，可以提高卷绕过程中极耳错位的控制能力，改善了电极组件的品质。
本申请提供的电极组件的制备方法还包括提供多片隔膜，隔膜用于隔离第一种极片和第二种极片。
卷绕组件用于将多个第一种极片放卷装置提供的多片第一种极片、至少一个第二种极片放卷装置提供的至少一片第二种极片和多个隔膜放卷装置提供的多片隔膜进行卷绕，以形成具有卷绕结构的至少一个电极组件。
在一些实施例中，在电极组件的制备方法中，通过吸附多片隔膜中的至少一片隔膜的卷绕起始段，将多片第一种极片、至少一片第二种极片和多片隔膜卷绕。
在一些实施例中，电极组件的制备方法还包括：将多片隔膜中的至少一片隔膜的卷绕起始段送入卷绕组件的卷芯卷绕一定长度后，将多片隔膜中的剩余隔膜送入卷芯并通过至少一片隔膜带动剩余隔膜卷绕。
在一些实施例中，电极组件的制备方法还包括：至少一个第一切断件中的每个第一切断件在卷绕结构卷绕至预定圈数时在保留至少一片隔膜的基础上切断进入卷绕结构位于的第一上料工位的其它隔膜。
至少一个第二切断件中的每个第二切断件在保留的至少一片隔膜在上料工位上料成功后切断位于第一上料工位与第一下料工位之间的保留的至少一片隔膜。
在一些实施例中，每个卷芯的至少一个负压口中的每个负压口吸附多片隔膜中的至少一片隔膜。
在一些实施例中，多个第一复合机构中的每个第一复合机构将多片第一种极片中的一片第一种极片和多片隔膜中的一片隔膜复合成第一复合极片，
至少一个第二复合机构中的每个第二复合机构将至少一片第二种极片中的一片第二种极片和多片隔膜中的另一片隔膜复合成第二复合极片，
卷绕组件将所有的第一复合极片和所有的第二复合极片卷绕形成电极组件。
在将两个第一复合极片和两个第二复合极片进行卷绕的实施例中，一片第一复合极片对应的隔膜的卷绕起始段送入卷芯卷绕一定长度后，将剩余的一个第一复合极片和两个第二复合极片的隔膜的卷绕起始段共同送入卷芯并通过在先送入的第一复合极片的隔膜带动剩余隔膜卷绕。
在一些实施例中，电极组件的制备方法包括至少一个第三复合机构中的每个第三 复合机构将多片第二种极片中的一片第二种极片、至少一片第二种极片中的一片第二种极片和多片隔膜中的两片隔膜复合成第三复合极片；
卷绕组件将所有的第三复合极片卷绕形成电极组件。
在一些实施例中，电极组件的制备方法包括第四复合机构将多片第一种极片、至少一片第二种极片和多片隔膜复合成第四复合极片，卷绕组件将第四复合极片卷绕形成电极组件。
在一些实施例中，以四片极片和四片隔膜卷绕形成的电极组件为实例，描述电极组件的制备方法，其中四片极片定义为极片一、极片二、极片三和极片四，电极组件的制备方法包括：
放卷装置提供四片隔膜和四片极片，也就是极片一至四，四片隔膜通过加热件加热；加热后的四片隔膜以及极片一至四分别入料到对应的复合机构，复合机构将隔膜与极片复合形成复合极片，当极片的长度满足设定要求后，极片被切断，放卷装置中的极片等待下一次极片的释放。
复合极片的卷绕起始段为一节未复合极片的隔膜卷首，先通过一上料组件将复合极片一的隔膜卷首，也就是隔膜的卷绕起始段，送到卷芯的卷绕处，位于第一工位的卷芯吸附隔膜完成卷首卷绕。
卷芯上设置的负压口可以轻易吸附隔膜卷首，卷绕稳固后，另一上料组件将复合极片二至四与复合极片一共同卷绕。
复合极片二至四完成卷绕后，复合极片二至四所在的隔膜被切断，卷芯由第一工位切换至第二工位，复合极片一所对应的隔膜被切断，复合极片一继续被卷芯卷绕，复合极片一收尾卷绕至电极组件的最外层，可以贴收尾胶带。
卷芯可以转换至第三工位，卷芯在第三工位其上的电极组件被卸下。
在一些实施例中，先将一片隔膜c的卷绕起始段送入卷芯卷绕一定长度后，将剩余的三片隔膜c的卷绕起始段共同送入卷芯并通过在先送入的隔膜带动剩余隔膜卷绕，卷绕完成贴收尾胶带f。在将两片第一种极片a、两片第二种极片b和四片隔膜c进行卷绕的实施例中，采用上述卷绕方法形成的电极组件结构如图26所示。
在另一些实施例中，将四片隔膜c的卷绕起始段共同送入卷芯卷绕。在将两片第一种极片a、两片第二种极片b和四片隔膜c进行卷绕的实施例中，四片隔膜c的卷绕起始段共同送入卷芯卷绕，卷绕完成贴收尾胶带f，采用该卷绕方法形成的电极组件结构如图27所示。
在再一些实施例中，将多片隔膜c的卷绕起始段先后依次送入卷芯卷绕，在前一隔膜的卷绕起始段送入卷芯卷绕一定长度后，将多片隔膜中的另一隔膜送入卷芯，再将多片隔膜中的剩余隔膜按照上述方式依次送入卷芯卷绕。在将两片第一种极片a、两片第二种极片b和四片隔膜c进行卷绕的实施例中，先将第一片隔膜的卷绕起始段送入卷芯卷绕，在第一片隔膜卷绕一定长度后，将第二片隔膜的卷绕起始段送入卷芯卷绕，在第二片隔膜卷绕一定长度后，将第三片隔膜的卷绕起始段送入卷芯卷绕，在第三片隔膜卷绕一定长度后，将第四片隔膜的卷绕起始段送入卷芯卷绕，卷绕完成贴尾胶f，采用该卷绕方法形成的电极组件结构如图28所示。
采用本公开实施例提供的制备电极组件的设备及电极组件的制备方法制备的电机组件，能够有效降低电极组件的内阻，缓解电极组件在高功率充放电时，电极组件发热量大，存在安全风险，缩短电池寿命的问题。该电极组件可以应用为消费类电极组件、动力型电极组件、储能型电极组件等。
另外，在没有明确否定的情况下，其中一个实施例的技术特征可以有益地与其它一个或多个实施例相互结合。
最后应当说明的是:以上实施例仅用以说明本申请的技术方案而非对其限制；尽管参照较佳实施例对本申请进行了详细的说明，所属领域的普通技术人员应当理解：依然可以对本申请的具体实施方式进行修改或者对部分技术特征进行等同替换；而不脱离本申请技术方案的精神，其均应涵盖在本申请请求保护的技术方案范围当中。

Claims (22)

  1. 一种制备电极组件的设备，包括：
    卷绕组件；
    多个第一种极片放卷装置，用于向所述卷绕组件提供多片第一种极片；和
    至少一个第二种极片放卷装置，用于向所述卷绕组件提供至少一片第二种极片，所述第一种极片与所述第二种极片的极性相反；
    其中，所述卷绕组件用于将所述多片第一种极片和所述至少一片第二种极片进行卷绕，以形成电极组件。
  2. 如权利要求1所述的制备电极组件的设备，还包括多个隔膜放卷装置，所述多个隔膜放卷装置用于向所述卷绕组件提供多片隔膜，所述隔膜用于隔离所述第一种极片和所述第二种极片。
  3. 如权利要求2所述的制备电极组件的设备，其中，所述卷绕组件包括卷芯，所述卷芯用于将所述多片第一种极片、所述至少一片第二种极片和所述多片隔膜卷绕。
  4. 如权利要求3所述的制备电极组件的设备，其中，所述卷芯设有至少一个负压口，用于吸附所述多片隔膜中的至少一片隔膜的卷绕起始段。
  5. 如权利要求4所述的制备电极组件的设备，其中，所述负压口包括所述卷芯的卷绕表面上设置的凹孔或贯穿孔。
  6. 如权利要求4或5所述的制备电极组件的设备，其中，所述负压口为三角形、圆形、四方形或不规则形状。
  7. 如权利要求4至6任意一项所述的制备电极组件的设备，其中，所述负压口在所述卷芯的卷绕表面阵列分布。
  8. 如权利要求3所述的制备电极组件的设备，还包括：
    压辊，用于将所述多片隔膜中的至少一片隔膜的卷绕起始段压向所述卷芯；
    喷吹机构，用于将所述卷绕起始段的端部吹贴于所述卷芯表面，以便所述卷芯卷绕所述卷绕起始段,以带动所述多片第一种极片、所述至少一片第二种极片和所述多片隔膜卷绕。
  9. 如权利要求3至8任意一项所述的制备电极组件的设备，其中，所述卷绕组件还包括切换装置,所述卷芯设于所述切换装置,所述切换装置用于使所述卷芯在上料工位和下料工位之间切换。
  10. 如权利要求9所述的制备电极组件的设备，包括：
    第一切断件，用于当所述卷芯卷绕所述电极组件达到预定圈数时，切断所述多片隔膜中的至少一片且保留至少一片隔膜；或
    第二切断件，用于当所述卷芯在所述下料工位时，切断所述保留的至少一片隔膜。
  11. 如权利要求3至10任意一项所述的制备电极组件的设备，还包括第一上料件，用于将所述至少一片隔膜的所述卷绕起始段送入所述卷芯。
  12. 如权利要求11所述的制备电极组件的设备，包括第二上料件，用于当切断所述多片隔膜中的至少一片时，夹住所述被切断的至少一片隔膜。
  13. 如权利要求2至12任意一项所述的制备电极组件的设备，包括：
    多个第一复合机构，所述多个第一复合机构中的每个第一复合机构用于将所述多片第一种极片中的一片第一种极片和所述多片隔膜中的一片隔膜复合成第一复合极片，
    至少一个第二复合机构，所述至少一个第二复合机构中的每个第二复合机构用于将所述至少一片第二种极片中的一片第二种极片和所述多片隔膜中的另一片隔膜复合成第二复合极片，
    所述卷绕组件用于将所有的所述第一复合极片和所有的所述第二复合极片卷绕形成电极组件。
  14. 如权利要求2至12任意一项所述的制备电极组件的设备，包括至少一个第三复合机构，所述至少一个第三复合机构中的每个第三复合机构用于将所述多片第一种极片中的一片第一种极片、所述至少一片第二种极片中的一片第二种极片和所述多片隔膜中的两片隔膜复合成第三复合极片；
    所述卷绕组件用于将所有的所述第三复合极片卷绕形成电极组件。
  15. 如权利要求2至12任意一项所述的制备电极组件的设备，包括第四复合机构，用于将所述多片第一种极片、所述至少一片第二种极片和所述多片隔膜复合成第四复合极片，所述卷绕组件用于将所述第四复合极片卷绕形成所述电极组件。
  16. 一种电极组件的制备方法，包括：
    提供多片第一种极片；
    提供至少一片第二种极片，所述第一种极片和所述第二种极片极性相反；
    将所述多片第一种极片和所述至少一片第二种极片进行卷绕，以形成电极组件。
  17. 如权利要求16所述的电极组件的制备方法，其特征在于，还包括：提供多片 隔膜，所述隔膜用于隔离所述第一种极片和所述第二种极片。
  18. 如权利要求17所述的电极组件的制备方法，其中，吸附所述多片隔膜中的至少一片隔膜的卷绕起始段，将所述多片第一种极片、所述至少一片第二种极片和所述多片隔膜卷绕。
  19. 如权利要求17所述的电极组件的制备方法，其中，将所述多片隔膜中的至少一片隔膜的卷绕起始段送入所述卷绕组件的卷芯卷绕一定长度后，将所述多片隔膜中的剩余隔膜送入所述卷芯并通过所述至少一片隔膜带动所述剩余隔膜卷绕。
  20. 如权利要求17所述的电极组件的制备方法，包括：
    多个第一复合机构中的每个第一复合机构将所述多片第一种极片中的一片第一种极片和所述多片隔膜中的一片隔膜复合成第一复合极片，
    至少一个第二复合机构中的每个第二复合机构将所述至少一片第二种极片中的一片第二种极片和所述多片隔膜中的另一片隔膜复合成第二复合极片，
    所述卷绕组件将所有的所述第一复合极片和所有的所述第二复合极片卷绕形成电极组件。
  21. 如权利要求17所述的电极组件的制备方法，包括至少一个第三复合机构中的每个第三复合机构将所述多片第一种极片中的一片第一种极片、所述至少一片第二种极片中的一片第二种极片和所述多片隔膜中的两片隔膜复合成第三复合极片；
    所述卷绕组件将所有的所述第三复合极片卷绕形成电极组件。
  22. 如权利要求17所述的电极组件的制备方法，包括第四复合机构将所述多片第一种极片、所述至少一片第二种极片和所述多片隔膜复合成第四复合极片，所述卷绕组件将所述第四复合极片卷绕形成所述电极组件。
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