WO2023173931A1 - 卷绕设备和方法 - Google Patents

卷绕设备和方法 Download PDF

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Publication number
WO2023173931A1
WO2023173931A1 PCT/CN2023/072552 CN2023072552W WO2023173931A1 WO 2023173931 A1 WO2023173931 A1 WO 2023173931A1 CN 2023072552 W CN2023072552 W CN 2023072552W WO 2023173931 A1 WO2023173931 A1 WO 2023173931A1
Authority
WO
WIPO (PCT)
Prior art keywords
pole piece
winding
adjustment component
winding device
electrode assembly
Prior art date
Application number
PCT/CN2023/072552
Other languages
English (en)
French (fr)
Inventor
王培潮
李晓媛
谢超
黄国达
王艺若
胡圣生
赵万奎
林纲
陈耀金
Original Assignee
宁德时代新能源科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to EP23769442.7A priority Critical patent/EP4415108A1/en
Publication of WO2023173931A1 publication Critical patent/WO2023173931A1/zh
Priority to US18/664,280 priority patent/US20240297330A1/en

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Classifications

    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H21/00—Apparatus for splicing webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion 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
    • 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

  • Embodiments of the present application relate to the field of machinery, and more specifically, to a winding device and method.
  • Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection.
  • battery technology is an important factor related to their development.
  • a battery is composed of one or more battery cells, each battery cell includes an electrode assembly, and the electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator.
  • the positive electrode sheet, negative electrode sheet and separator can be rolled by winding equipment to form a rolled electrode assembly. How to improve the processing efficiency of electrode components by winding equipment to increase battery production capacity is an urgent technical problem that needs to be solved.
  • the present application provides a winding equipment and method, which can improve the processing efficiency of the electrode assembly by the winding equipment, so as to increase the production capacity of the battery.
  • a winding device including: a first unwinding device for outputting the first pole piece; a first cutting device disposed downstream of the first unwinding device for outputting the first pole piece along the first unwinding device.
  • the first pole piece is cut into a first part and a second part in the length direction;
  • a winding device is provided downstream of the first cutting device and has a first winding part and a second winding part capable of simultaneous winding movement.
  • the first winding part is used to wind the first part of the first pole piece to form the first electrode assembly
  • the second winding part is used to wind the second part of the first pole piece to form the second electrode assembly.
  • the winding equipment only one first unwinding device is needed to cooperate with the first slitting device and the winding device, so that two electrode assemblies can be manufactured simultaneously.
  • the winding equipment has high manufacturing efficiency for electrode components and does not occupy a large factory space. It is conducive to improving the ratio of land use and production capacity of the winding equipment and increasing the maximum production capacity that the factory can achieve.
  • the first pole piece includes a first substrate and two first active coating areas coated on the surface of the first substrate, and the two first active coating areas are respectively located on the first pole.
  • the first pole piece includes two first active coating areas and a first tab area located between the two first active coating areas.
  • the first pole piece is different from the single pole piece generally used to manufacture a single electrode assembly.
  • the first pole piece includes two pole pieces used to manufacture two electrode assemblies (ie, the first part after cutting and the third part after cutting). Part 2).
  • the first pole piece can be manufactured through the same coating process. Compared with the technical solution of manufacturing two monopole pieces separately through two coating processes, the production efficiency of the first pole piece is higher.
  • the first cutting device includes: a first cutting part and a second cutting part; wherein the first cutting part is used to cut in the first tab area to form the first pole. At least one tab of the first portion of the piece, and the second slitting portion is used to cut in the first tab region to form at least one tab of the second portion of the first pole piece.
  • the first slitting part and the second slitting part are provided in the first slitting device, and the first part of the first pole piece with smaller size and higher precision can be manufactured according to specific needs.
  • the tabs and the tabs of the second part of the first pole piece are not only beneficial to the subsequent manufacturing process of the electrode assembly, such as the processing of the tabs in the wound electrode assembly, etc., but also improve the overall quality of the electrode assembly. performance.
  • the winding equipment further includes: a first adjustment component and/or a second adjustment component, disposed between the first slitting device and the winding device; wherein the first adjustment component is used to adjust the first adjustment component.
  • the transmission parameters of the first part of a pole piece in the winding equipment are adjusted, and/or the second adjustment component is used to adjust the transmission parameters of the second part of the first pole piece in the winding equipment.
  • the first part and/or The transmission of the second part in the winding equipment is more stable, and the subsequent winding effect of the first part and/or the second part in the winding device is improved, thereby improving the overall performance of the two prepared electrode assemblies.
  • the first adjustment component and the second adjustment component include: a deviation correction component; the deviation correction component in the first adjustment component is used to adjust the relative position of the first part of the first pole piece in the winding device;
  • the correction component of the two adjustment components is used to adjust the relative position of the second part of the first pole piece in the winding device; and/or, the first adjustment component and the second adjustment component include: a tension adjustment component; a first adjustment component
  • the tension adjustment component in the first pole piece is used to detect and adjust the tension of the first part of the first pole piece; the tension adjustment component in the second adjustment component is used to detect and adjust the tension of the second part of the first pole piece.
  • the two deviation correction components and the two tension adjustment components can be more targeted.
  • the relative position and tension of the first part and the second part of the first pole piece in the winding equipment are adjusted, and the adjustment result is more accurate, which is beneficial to improving the winding performance of the first part and the second part of the first pole piece.
  • the coiling effect in the installation is particularly advantageous.
  • the winding equipment further includes: a first feeding part and a second feeding part, which are arranged upstream of the winding device; wherein the first feeding part is used to convert the third feeding part of the first pole piece One part is transferred to the first winding part of the winding device, and the second feeding part is used to transfer the second part of the first pole piece to the second winding part of the winding device.
  • two parts of the first pole piece are processed by two feeding parts respectively, so that the two parts of the first pole piece can enter the winding device respectively in a more stable and reliable manner.
  • the two winding parts improve the winding effect of the two parts of the first pole piece, thereby improving the performance of the two manufactured electrode assemblies.
  • the first feeding part includes: a first moving roller, a first driving member and a first transmission member
  • the second feeding part includes: a second moving roller, a second driving member and a second transmission member.
  • the first driving member is used to drive the first moving roller to press the first part of the first pole piece to the first transmission member
  • the first transmission member is used to transfer the first part of the first pole piece to the first roll winding part
  • the second driving member is used to drive the second moving roller to press the second part of the first pole piece to the second transmission member
  • the second transmission member is used to transmit the second part of the first pole piece to the second Winding section.
  • the first feeding part and the second feeding part are composed of moving rollers, driving parts and transmission parts.
  • the overall structure is easy to implement and has high reliability, and can connect the two parts of the first pole piece. The parts are transferred to the winding device smoothly and efficiently.
  • the winding equipment further includes: a second unwinding device, used to output the second pole piece; a second cutting device, disposed downstream of the second unwinding device, used to output the second pole piece along the The second pole piece is cut into a first part and a second part in the length direction of the piece; a winding device is provided downstream of the second cutting device, and the first winding part is used to wind the first part of the first pole piece and the second part.
  • the first part of the two pole pieces is used to form the first electrode assembly
  • the second winding part is used to wind the second part of the first pole piece and the second part of the second pole piece to form the second electrode assembly.
  • the winding equipment only one first unwinding device and one second unwinding device are required to cooperate with the first slitting device, the second slitting device and the winding device, that is, Two electrode assemblies can be manufactured simultaneously.
  • This winding equipment has high manufacturing efficiency for electrode components, and can further reduce the required factory space, which is conducive to further increasing the ratio of land use and production capacity of the winding equipment, so as to increase the maximum production capacity that the factory can achieve.
  • the second pole piece includes a second substrate and a second active coating area coated on the surface of the second substrate, and the second active coating area is in the width direction of the second pole piece. Both sides of the second pole piece respectively have second tab areas extending along the length direction of the second pole piece; the second cutting device is used to cut in the second active coating area along the length direction of the second pole piece to cut the second pole piece.
  • the pole piece is cut into a first part and a second part.
  • the second pole piece includes a second active coating area and two second tab areas located on both sides of the second active coating area.
  • the second pole piece includes two pole pieces for manufacturing two electrode assemblies (ie, the first part after cutting and the third part after cutting). Part 2).
  • the second pole piece can be manufactured through the same coating process. Compared with the technical solution of manufacturing two monopole pieces separately through two coating processes, the production efficiency of the second pole piece is higher.
  • the winding equipment further includes: a third adjustment component and/or a fourth adjustment component, disposed between the second slitting device and the winding device; wherein the third adjustment component is used to adjust the The transmission parameters of the first part of the second pole piece in the winding equipment are adjusted, and/or the fourth adjustment component is used to adjust the transmission parameters of the second part of the second pole piece in the winding equipment.
  • the first part and/or the second part can be adjusted.
  • the transmission of the second part in the winding equipment is more stable, and the subsequent winding effect of the first part and/or the second part in the winding device is improved, thereby improving the overall performance of the two electrode assemblies prepared.
  • the third adjustment component and the fourth adjustment component include: a deviation correction component; the deviation correction component in the third adjustment component is used to adjust the relative position of the first part of the second pole piece in the winding device; The correction component among the four adjustment components is used to adjust the relative position of the second part of the second pole piece in the winding equipment; and/or, the third adjustment component and the fourth adjustment component include: a tension adjustment component; a third adjustment component The tension adjustment component in the fourth adjustment component is used to detect and adjust the tension of the first part of the second pole piece; the tension adjustment component in the fourth adjustment component is used to detect and adjust the tension of the second part of the second pole piece.
  • the winding equipment further includes: two second unwinding devices, each of the two second unwinding devices is used to output the second pole piece; the winding device, Disposed downstream of the two second unwinding devices, the first winding part is used to wind the first part of the first pole piece and the second pole piece from a second unwinding device to form the first electrode assembly, and the second The winding part is used to wind the second part of the first pole piece and the second pole piece from another second unwinding device to form a second electrode assembly.
  • the winding equipment includes two second unwinding devices, and the second pole pieces provided on the two second unwinding devices are pole pieces in a single electrode assembly and do not need to be cut. .
  • the positions of the two second pole pieces output by the two second unwinding devices do not need to be significantly adjusted subsequently, and the two second pole pieces can also be aligned with the first pole piece.
  • the two parts are wound together to form two electrode assemblies. Therefore, through this technical solution, the transmission of the second pole piece in the winding equipment is more stable, and the performance and yield of the electrode assembly manufactured by the winding equipment can be improved.
  • the second pole piece includes a second substrate and a second active coating area coated on the surface of the second substrate, and the second active coating area is in the width direction of the second pole piece.
  • One side of the second pole piece has a second tab area extending along the length direction of the second pole piece.
  • the winding equipment further includes: two third unwinding devices, each of the two third unwinding devices is used to output the first separator; two fourth unwinding devices The winding device, each of the two fourth unwinding devices is used to output the second diaphragm; the winding device is arranged downstream of the two third unwinding devices and the two fourth unwinding devices, The first winding part is used to wind the first part of the first pole piece, the first separator from a third unwinding device, and the second separator from a fourth unwinding device to form the first electrode assembly; the second roll The winding part is used to wind the second part of the first pole piece, the first separator from another third unwinding device, and the second separator from another fourth unwinding device to form a second electrode assembly.
  • two first separators are output by two third unwinding devices, and two second separators are output by two fourth unwinding devices.
  • the two first separators and the two second separators are output by two third unwinding devices.
  • the separator can be simultaneously transferred to the two winding parts in the winding device to be wound simultaneously with the two parts of the first pole piece to form two electrode assemblies with stable performance and reliable use, and the manufacturing efficiency of the electrode assemblies is relatively high. high.
  • the winding equipment further includes: a first merging device disposed between two third unwinding devices and the winding device, the first merging device includes two first merging devices disposed on the same roller.
  • the rotating part, the two first rotating parts correspond to the two third unwinding devices and the two winding parts in the winding device one-to-one, and each first rotating part is used to transfer the winding from the corresponding third unwinding device.
  • the first separator is transported to the corresponding winding part; and/or a second merging device is provided between the two fourth unwinding devices and the winding device, and the second merging device includes two fourth unwinding devices arranged on the same roller.
  • each second rotating part is used to transfer data from the corresponding fourth unwinding device second diaphragm Send it to the corresponding winding section.
  • the two first separators can be transported to the two winding parts in the winding device through the same first merging device.
  • the two second separators can also be transported through the same second merging device.
  • the device is transferred to the two winding sections in the winding device.
  • there is no need to transport the two first separators to the winding device through multiple devices and there is no need to transport the two second separators to the winding device through multiple devices, thereby reducing the number of winding equipment.
  • the number of devices in the winding machine further reduces the factory space required for the winding equipment.
  • the winding equipment further includes: two fifth adjustment components, one corresponding to the two third unwinding devices, and arranged between the first merging device and the two third unwinding devices.
  • the fifth adjustment component is used to adjust the transmission parameters of the first diaphragm in the winding equipment; and/or, the two sixth adjustment components correspond to the two fourth unwinding devices one by one, and are arranged on the second Between the merging device and the two fourth unwinding devices, the sixth adjustment component is used to adjust the transmission parameters of the second diaphragm in the winding equipment.
  • the adjustment of the transmission parameters of the first diaphragm and/or the second diaphragm by the fifth adjustment component and/or the sixth adjustment component can make the first diaphragm and/or the second diaphragm
  • the transmission of the separator in the winding equipment is more stable and the subsequent winding effect of the first separator and/or the second separator in the winding device is improved, thereby improving the overall performance of the two electrode assemblies produced.
  • the fifth adjustment component and the sixth adjustment component include: a tension adjustment component; the tension adjustment component in the fifth adjustment component is used to detect and adjust the tension of the first diaphragm; the tension in the sixth adjustment component The adjusting component is used to detect and adjust the tension of the second diaphragm.
  • a winding method which includes: outputting the first pole piece; cutting the first pole piece into a first part and a second part along the length direction of the first pole piece; and performing on the first part of the first pole piece.
  • the second portion of the first pole piece is rolled to form a second electrode assembly.
  • the first pole piece includes a first substrate and two first active coating areas coated on the surface of the first substrate, and the two first active coating areas are respectively located on the first pole.
  • Cutting the piece into the first part and the second part includes: cutting in the first tab area along the length direction of the first pole piece to cut the first pole piece into the first part and the second part.
  • cutting in the first tab area along the length direction of the first pole piece to cut the first pole piece into the first part and the second part includes: along the length toward the first pole piece The first cutting line extending in the direction is cut in the first tab area to obtain the first portion of the first pole piece and form at least one tab of the first portion of the first pole piece; extending along the length direction toward the first pole piece The second cutting line is cut in the first tab area to obtain the second part of the first pole piece and to form at least one tab of the second part of the first pole piece.
  • the winding method further includes: outputting the second pole piece; cutting the second pole piece into a first part and a second part along the length direction of the second pole piece; Winding to form the first electrode assembly, and simultaneously winding the second portion of the first pole piece to form the second electrode assembly includes: winding the first portion of the first pole piece and the first portion of the second pole piece Winding to form a first electrode assembly, while winding the second portion of the first pole piece and the second portion of the second pole piece to form a second electrode assembly.
  • the second pole piece includes a second substrate and a second active coating area coated on the surface of the second substrate, and the second active coating area is in the width direction of the second pole piece.
  • the two sides respectively have a second a second tab region extending in the length direction of the pole piece; cutting the second pole piece into a first part and a second part along the length direction of the second pole piece, including: Cut in the layer area to cut the second pole piece into a first part and a second part.
  • the winding method further includes: outputting two second pole pieces; winding the first part of the first pole piece to form the first electrode assembly, and simultaneously winding the second part of the first pole piece.
  • Winding to form the second electrode assembly includes: winding the first portion of the first pole piece and one of the two second pole pieces to form the first electrode assembly, and simultaneously winding the first pole piece The second part and the other of the two second pole pieces are rolled to form a second electrode assembly.
  • the second pole piece includes a second substrate and a second active coating area coated on the surface of the second substrate, and the second active coating area is in the width direction of the second pole piece.
  • One side of the second pole piece has a second tab area extending along the length direction of the second pole piece.
  • the winding equipment only one first unwinding device is needed to cooperate with the first slitting device and the winding device, so that two electrode assemblies can be manufactured simultaneously.
  • the winding equipment has high manufacturing efficiency for electrode components and does not occupy a large factory space. It is conducive to improving the ratio of land use and production capacity of the winding equipment and increasing the maximum production capacity that the factory can achieve.
  • Figure 1 is a schematic structural diagram of a battery cell provided by an embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of the winding equipment provided by an embodiment of the present application.
  • Figure 3 is a schematic diagram of the first pole piece before and after cutting according to an embodiment of the present application.
  • Figure 4 is a schematic diagram of the first pole piece being cut by the first cutting device according to an embodiment of the present application
  • FIG. 5 is another structural schematic diagram of the winding equipment provided by an embodiment of the present application.
  • Figure 6 is a schematic structural diagram of a first feeding device provided by an embodiment of the present application.
  • Figure 7 is another structural schematic diagram of the winding equipment provided by an embodiment of the present application.
  • Figure 8 is a schematic diagram of the second pole piece before and after cutting according to an embodiment of the present application.
  • Figure 9 is another structural schematic diagram of the winding equipment provided by an embodiment of the present application.
  • Figure 10 is another structural schematic diagram of the winding equipment provided by an embodiment of the present application.
  • FIG 11 is another structural schematic diagram of the winding equipment provided by an embodiment of the present application.
  • Figure 12 is a schematic structural diagram of a winding device provided by an embodiment of the present application.
  • Figure 13 is a schematic structural diagram of a first merging device provided by an embodiment of the present application.
  • Figure 14 is another structural schematic diagram of the winding equipment provided by an embodiment of the present application.
  • Figure 15 is a schematic flow chart of a winding method provided by an embodiment of the present application.
  • Figure 16 is another schematic flow chart of the winding method provided by an embodiment of the present application.
  • Figure 17 is another schematic flow chart of the winding method provided by an embodiment of the present application.
  • an embodiment means that a particular feature, structure or characteristic described in connection with the embodiment may be included in at least one embodiment of the application.
  • the appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.
  • a battery refers to a physical module that includes one or more battery cells to provide electrical energy.
  • the battery mentioned in this application may include a battery module or a battery pack.
  • Batteries generally include a box for packaging one or more battery cells. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.
  • the battery cells may include lithium ion secondary batteries, lithium ion primary batteries, lithium sulfur batteries, sodium lithium ion batteries, sodium ion batteries or magnesium ion batteries, etc., which are not limited in the embodiments of the present application.
  • battery cells can also be called cells.
  • the battery cell includes an electrode assembly and an electrolyte.
  • the electrode assembly consists of a positive electrode sheet, a negative electrode sheet and a separator. Battery cells mainly rely on the movement of metal ions between the positive and negative electrodes to work.
  • the positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer.
  • the positive electrode active material layer is coated on the surface of the positive electrode current collector.
  • the current collector that is not coated with the positive electrode active material layer protrudes from the current collector that is coated with the positive electrode active material layer.
  • the current collector coated with the positive electrode active material layer serves as the positive electrode tab.
  • the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganate, etc.
  • the negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer.
  • the negative electrode active material layer is coated on the surface of the negative electrode current collector.
  • the current collector that is not coated with the negative electrode active material layer protrudes from the current collector that is coated with the negative electrode active material layer.
  • the current collector coated with the negative active material layer serves as the negative electrode tab.
  • the material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon.
  • the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together.
  • the material of the separator can be polypropylene (PP) or polyethylene (Polyethylene, PE).
  • the electrode assembly of the battery cell is a rolled structure.
  • the wound structure of the electrode assembly can be cylindrical as a whole, and the cylindrical electrode assembly is matched with the cylindrical shell, and the whole can form a cylindrical battery cell.
  • the winding device winds a set of positive electrode sheets, negative electrode sheets and separators to form an electrode assembly. After completing the battery assembly, it continues to roll a set of positive electrode sheets, negative electrode sheets and separators. wound to form the next battery component.
  • the production efficiency of the battery components of this technical solution is low, which is not conducive to improving the production efficiency of battery cells and batteries.
  • the winding device can wind two sets of positive electrode sheets, negative electrode sheets and separators at the same time to form two electrode assemblies.
  • this technical solution can improve the production efficiency of electrode assemblies, during the production and manufacturing process, two sets of devices for placing positive electrode sheets, negative electrode sheets, and separators need to be set up, which requires a large factory space.
  • the present application provides a winding device, which includes an unwinding device, a slitting device and a winding device.
  • the unwinding device is used to provide the pole piece
  • the cutting device is used to cut the pole piece into the first part and the second part.
  • the winding device includes: a first winding part and a second winding part capable of simultaneous winding movements.
  • the first winding part is used to wind the first part of the first pole piece to form the first electrode assembly
  • the second winding part The winding portion is used to wind the second portion of the first pole piece to form a second electrode assembly.
  • the pole piece provided by the unwinding device can be cut into two parts by the slitting device, and the two parts can be wound by the two winding parts of the winding device respectively to form two electrode assemblies. Therefore, in this winding equipment, only one unwinding device is needed, and two electrode assemblies can be obtained by winding at the same time. The manufacturing efficiency of this winding equipment is high, and it does not occupy a large factory space.
  • FIG. 1 shows a schematic structural diagram of a battery cell 10 provided by an embodiment of the present application.
  • the battery cell 10 may include a case 110 and an electrode assembly 120 , wherein the electrode assembly 120 is accommodated in the case 110 , and the shape of the case 110 may be determined according to the shape of the electrode assembly 120 .
  • the electrode assembly 120 is cylindrical, and can be formed by stacking and winding a positive electrode sheet, a separator, and a negative electrode sheet (not shown in the figure).
  • the housing 110 is a hollow cylindrical housing adapted to the electrode assembly 120 .
  • at least one surface of the housing 110 has an opening so that the electrode assembly 120 is placed in the housing 110 .
  • the end surfaces of both ends of the housing 110 have openings.
  • the battery cell 10 may also include an end cap assembly to cover the opening in the case 110 .
  • the battery cell 10 includes a first end cover assembly 130 a and a second end cover assembly 130 b.
  • the two end cover assemblies respectively cover both ends of the hollow cylindrical housing 110 and are connected to the housing 110 . , to form a closed cavity housing the electrode assembly 120 .
  • the closed cavity is also filled with electrolyte, such as electrolyte solution.
  • the first end cap assembly 130a includes a first end cap 131a and a first electrode terminal 132a.
  • the first electrode terminal 132a can be installed and fixed on the first end cap 131a.
  • the second end cap assembly 130b may also include a second end cap and a second electrode terminal.
  • the second electrode terminal in the second end cap assembly 130b and the first electrode terminal 132a in the first end cap assembly 130a are two electrode terminals with opposite polarities. For example, when the first electrode terminal 132a is a positive electrode terminal , the second electrode terminal is the negative electrode terminal.
  • a connecting member (not shown in FIG. 1) may also be included, or the connecting member may also be called a current collecting member, It is used to electrically connect the electrode assembly 120 and the electrode terminal inside the battery cell 10 .
  • the electrode assembly 120 may have two first tabs 121a and second tabs 121b with opposite polarities.
  • first tab 121a is a positive tab
  • the second tab 121b is a negative tab.
  • the first tab 121 a and the second tab 121 b are respectively located on two end surfaces of the cylindrical electrode assembly 120 .
  • the two end surfaces of the cylindrical shape can be processed through relevant processes to form the two tabs.
  • the first tab 121a of the electrode assembly 120 can be connected to the first electrode terminal 132a in the first end cover assembly 130a through a current collecting member.
  • the first tab 121a of the electrode assembly 120 The second tab 121b may be connected to the second electrode terminal in the second end cap assembly 130b through another connecting member.
  • FIG. 2 shows a schematic structural diagram of the winding equipment 20 provided by an embodiment of the present application.
  • the winding equipment 20 includes: a first unwinding device 211, used to output the first pole piece 201; a first cutting device 220, disposed downstream of the first unwinding device 211, used to output the first pole piece 201 along the
  • the first pole piece 201 is cut into a first part 201a and a second part 201b in the length direction of the first pole piece 201;
  • the winding device 230 is provided downstream of the first cutting device 220, and has a winding device capable of simultaneous winding movement.
  • the second portion 201b of the pole piece 201 forms a second electrode assembly.
  • the first unwinding device 211 may be provided with a rotatable shaft, and the first pole pieces 201 wound layer by layer are provided on the shaft.
  • the rotating shaft rotates under the action of the driving force
  • the first pole piece 201 wound on the rotating shaft is output in a flat state, and the first unwinding device 211 completes the unwinding action.
  • a conveying device may be provided downstream of the first unwinding device 211, for example, multiple as shown in FIG. 2 Roller structures, or conveyor belts, etc.
  • the transfer device can penetrate multiple processing devices in the winding device 20 to realize the flow transfer of the first pole piece 201 in the winding device 20 .
  • the first pole piece 201 is output by the first unwinding device 211, its shape in the winding device 20 In strip form.
  • the first pole piece 201 is a zigzag strip attached to a plurality of rollers.
  • the length direction of the first pole piece 201 is the length direction of the strip-shaped first pole piece 201 .
  • the length direction of the first pole piece 201 may also be the transmission direction of the first pole piece 201 .
  • the first cutting device 220 is disposed downstream of the first unwinding device 211 and is used to receive the first pole piece 201 output from the first unwinding device 211 and cut the first pole piece 201 along its length direction. into a first part 201a and a second part 201b.
  • the first cutting device 220 may be a laser die-cutting device, and the laser die-cutting device is fixedly installed in the winding device 20 .
  • the laser die-cutting device can cut the first pole piece 201 into the first part 201a and the second part 201b along the transmission direction of the first pole piece 201 .
  • the winding device 230 is provided downstream of the first slitting device 220 . After the first cutting device 220 cuts the first pole piece 201 into the first part 201a and the second part 201b, the first part 201a and the second part 201b can be transmitted by the conveying device at the same time and reach the winding device 230.
  • the winding device 230 has a first winding part and a second winding part capable of simultaneous winding movements.
  • the first winding part and the second winding part are used to respectively receive the first pole piece 201 of the first pole piece 201 .
  • the first winding part and the second winding part can simultaneously wind the first part 201a and the second part 201b of the first pole piece 201 to form the first electrode assembly and the second electrode assembly respectively.
  • the first part 201a and the second part 201b of the first pole piece 201 can be used to form two electrode assemblies respectively.
  • the first part 201a and the second part 201b of the first pole piece 201 can respectively serve as the positive pole piece in the two electrode assemblies, or the first part 201a and the second part 201b of the first pole piece 201 can respectively serve as the two positive pole pieces.
  • the winding device 230 may be a winding needle having two winding parts in the length direction to facilitate winding of the first part 201a and the second part of the first pole piece 201 .
  • the winding equipment 20 includes a first cutting device 220, which can cut the first pole piece 201 output by the first unwinding device 211 into two parts, and then, The two parts can be wound simultaneously by two winding parts in the winding device 230 to form two electrode assemblies. Therefore, in the winding equipment 20, only one first unwinding device 211 is required to cooperate with the first cutting device 220 and the winding device 230, so that two electrode assemblies can be manufactured simultaneously.
  • the winding equipment 20 has a high manufacturing efficiency for electrode assemblies and does not occupy a large factory space. It is conducive to improving the ratio of land use and production capacity of the winding equipment 20 and increasing the maximum production capacity that the factory can achieve.
  • FIG. 3 shows a schematic diagram of the first pole piece 201 before and after cutting according to an embodiment of the present application.
  • Figure 3(a) shows a schematic view of the first pole piece 201 before cutting
  • Figure 3(b) shows a schematic view of the first pole piece 201 after cutting.
  • the first pole piece 201 includes a first substrate 2011 and two first active coating areas 2012 coated on the surface of the first substrate 2011 .
  • An active coating area 2012 is located on both sides of the first pole piece 201 in the width direction, and there is a first tab extending along the length direction of the first pole piece 201 between the two first active coating areas 2012 District 2013.
  • the above-mentioned first cutting device 220 is used to cut in the first tab area 2013 along the length direction of the first pole piece 201, so as to cut the first pole piece 201 as shown in Figure 3(b)
  • the first part 201a and the second part 201b are shown in the figure.
  • the first active coating area 2012 coated on the first substrate 2011 may be a negative active material layer.
  • the first substrate 2011 can be a copper substrate, and the first active coating area 2012 includes carbon or silicon.
  • the first active coating area 2012 coated on the first substrate 2011 may be a positive active material layer.
  • the first substrate 2011 may be an aluminum substrate, and the first active coating area 2012 includes lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganate.
  • the first substrate 2011 is coated with two first active coating areas 2012, and the two first active coating areas 2012 are located on the two The first tab area 2013 is isolated between them, and the first tab area 2013 is an area on the first substrate 2011 that is not coated with the first active coating area 2012.
  • the two first active coating areas 2012 and the first tab area 2013 are strip-shaped areas and extend along the length direction of the first pole piece 201 .
  • the length dimension of the two first active coating areas 2012 and the first tab area 2013 may be similar to or the same as the length dimension of the first pole piece 201 .
  • the two first active coating areas 2012 have the same size, and the two first active coating areas 2012 covers both sides of the first pole piece 201 in the width direction.
  • the first tab area 2013 may be located at the center of the first pole piece 201 in the width direction.
  • the width of the first tab area 2013 can be designed according to the actual required tab size of the electrode assembly, which is not specifically limited in the embodiment of the present application.
  • the first cutting device 220 can further be performed along the center line of the first tab area 2013 in the length direction. Cut to form the first portion 201a and the second portion 201b of the same size.
  • the first part 201 a and the second part 201 b of the same size have the first active coating area 2012 of the same size and the tabs of the same size.
  • the first part 201a and the second part 201b of the same size can be used to be rolled to form an electrode assembly of the same size.
  • the first tab area 2013 can also be deviated from the center of the first pole piece 201 in the width direction.
  • the first cutting device 220 can cut the first pole piece 201
  • the first part 201a and the second part 201b are formed into different sizes for winding to form electrode assemblies of different sizes.
  • the first pole piece 201 includes two first active coating areas 2012 and a first tab area 2013 located between the two first active coating areas 2012 .
  • the first pole piece 201 is different from a single pole piece generally used to manufacture a single electrode assembly.
  • the first pole piece 201 includes two pole pieces used to manufacture two electrode assemblies (ie, the first part after cutting). 201a and Part II 201b).
  • the first pole piece 201 can be manufactured through the same coating process. Compared with the technical solution of manufacturing two monopole pieces separately through two coating processes, the production efficiency of the first pole piece 201 is higher.
  • first tab area 2013 is located between the two first active coating areas 2012.
  • the first cutting device 220 cuts in the first tab area 2013 to separate the first part 201a and the second part 201b.
  • the tabs of the first part 201a and the second part 201b can also be cut to meet the processing requirements of the tabs of the electrode assembly. beg.
  • the first cutting device 220 may only include one cutting part, which is used to form a cutting line in the first tab area 2013 to cut the first pole piece 201 into Two parts.
  • the cutting line may be a straight line to form the rectangular tabs in the first part 201a and the second part 201b shown in FIG. 3, or the cutting line may be a wavy line, a broken line, or other linear shapes. , to form pole tabs of other shapes.
  • the overall cost of the first cutting device 220 is low, its cutting method is simple, and its cutting efficiency and quality are high.
  • the first cutting device 200 may also include a plurality of cutting parts, which are used to form a plurality of cutting lines in the first tab area 2013 to cut the first pole piece 201 into multiple pieces. parts.
  • FIG. 4 shows a schematic diagram of cutting the first pole piece 201 by the first cutting device 220 according to an embodiment of the present application.
  • the first cutting device 220 includes: a first cutting part 221 and a second cutting part 222 .
  • the first cutting part 221 is used for cutting in the above-mentioned first tab area 2013 to form at least one tab of the first part 201a of the first pole piece 201
  • the second cutting part 222 is used for cutting in the first pole area 2013. Cut in the lug area 2013 to form at least one lug of the second portion 201b of the first pole piece 201.
  • the first cutting part 221 and the second cutting part 222 may be two lasers arranged side by side.
  • the laser emitted by the first cutting part 221 forms a first cutting line 2211 in the first tab area 2013, and the laser emitted by the second cutting part 222 forms a second cutting line 2221 in the first tab area 2013.
  • the first cutting line 2211 and the second cutting line 2221 do not cross each other, and both extend along the length direction of the first tab region 2013 (that is, the length direction of the first pole piece 201).
  • the first cutting line 2211 is used to form the tab of the first part 201a of the first pole piece 201.
  • the second cutting line 2221 is used to form the tab of the second part 201b of the first pole piece 201.
  • the first cutting line 2211 and the second cutting line 2221 can be preset in any shape, for example, they can be a polyline shape, a wavy line shape, etc.
  • the shapes of the first cutting line 2211 and the second cutting line 2221 may be the same or different.
  • the embodiment of the present application does not limit the specific design of the first cutting line 2211 and the second cutting line 2221.
  • the shape of the first cutting line 2211 and the second cutting line 2221 is a wavy line or a polygonal line, corresponding to the first cutting line 2211 and the second cutting line 2221, the first part 201a and the first part 201a of the first pole piece 201
  • the tabs of the two parts 201b may include multiple trapezoidal or multiple semicircular small tabs.
  • the first cutting part 221 and the second cutting part 222 are provided in the first cutting device 220, so that the two cutting parts can respectively cut the first pole piece 201 in the first pole piece 201.
  • a tab area 2013 is cut to form tabs of the first part 201a and tabs of the second part 201b respectively.
  • the first cutting part 221 and the second cutting part 222 can manufacture the pole tabs of the first part 201a of the first pole piece 201 and the first pole piece 201 with smaller size and higher precision according to specific needs.
  • the tabs of the second part 201b are not only beneficial to the subsequent manufacturing process of the electrode assembly, such as the processing of the tabs in the wound electrode assembly, etc., but also improve the overall performance of the electrode assembly.
  • FIG. 5 shows another schematic structural diagram of the winding device 20 provided by an embodiment of the present application.
  • the winding equipment 20 further includes: a first adjustment component 241 and/or a second adjustment component 242 , which are provided between the first slitting device 220 and the winding device 230 .
  • the first adjustment The component 241 is used to adjust the transmission parameters of the first part 201a of the first pole piece 201 in the winding device 20, and/or the second adjustment component 242 is used to adjust the second part 201b of the first pole piece 201 in the winding device 20. Adjust the transmission parameters in the surrounding equipment 20.
  • the first part 201a and the second part 201b are respectively transmitted to the downstream through two different material lines.
  • the winding equipment 20 is also provided with a first adjustment component 241 for the first pole.
  • the first portion 201a of the piece 201 is adjusted, and/or the second adjustment component 242 adjusts the second portion 201b of the first pole piece 201.
  • the first adjustment component 241 is used to adjust the transmission parameters of the first part 201a of the first pole piece 201 in the winding device 20.
  • the transmission parameters include but are not limited to: the first part 201a in the winding device 20. Tension, speed, direction, position, etc.
  • the second adjustment component 242 is used to adjust the transmission parameters of the second part 201b of the first pole piece 201 in the winding device 20.
  • the transmission parameters include but are not limited to: the transmission parameters of the second part 201b in the winding device. Tension, speed, direction, position, etc. in 20.
  • the transmission of the first part 201a and/or the second part 201b of the first pole piece 201 is more stable, and the subsequent winding effect of the first part 201a and/or the second part 201b in the winding device 230 is improved, thereby improving Overall performance of the two prepared electrode assemblies.
  • the winding device 20 may include a first adjustment component 241 and a second adjustment component 242 at the same time. Both the first adjustment component 241 and the second adjustment component 242 may include: a deviation correction component 2401.
  • the correction component 2401 in the first adjustment component 241 is used to adjust the relative position of the first part 201a of the first pole piece 201 in the winding device 20 .
  • the correction component 2401 in the second adjustment component 242 is used to adjust the relative position of the second part 201b of the first pole piece 201 in the winding device 20 .
  • the two correction components 2401 can more specifically adjust the first part 201a and the second part 201b of the first pole piece 201 respectively.
  • the relative position in the winding device 20 is adjusted, and the adjustment result is more accurate, which is beneficial to improving the winding effect of the first part 201a and the second part 201b of the first pole piece 201 in the winding device 230.
  • the first adjustment component 241 and the second adjustment component 242 may also include: a tension adjustment component 2402 .
  • the tension adjustment component 2402 in the first adjustment component 241 is used to detect and adjust the tension of the first part 201a of the first pole piece 201.
  • the correction component 2401 in the second adjustment component 242 is used to detect and adjust the tension of the second part 201b of the first pole piece 201.
  • the tension adjustment component 2402 can adjust the tension of the first part 201a of the first pole piece 201 and the second tension in a more targeted manner.
  • the tension of the part 201b is detected and adjusted, and the adjustment result is more accurate, which is beneficial to improving the transmission stability and reliability of the first part 201a and the second part 201b of the first pole piece 201 in the winding device 20, and can The winding effect of the first part 201a and the second part 201b in the winding device 230 is further ensured.
  • the winding equipment 20 also includes: a first feeding device 251, which is disposed on the winding device. upstream of device 230 for delivering the first part 201a and the second part 201b of the first pole piece 201 to the winding device 230.
  • Figure 6 shows a schematic structural diagram of the first feeding device 251 provided by an embodiment of the present application.
  • the first feeding device 251 includes: a first feeding part 2511 and a second feeding part 2512 , which are provided upstream of the winding device 230 .
  • the first feeding part 2511 is used to transfer the first part 201a of the first pole piece 201 to the first winding part of the winding device 230
  • the second feeding part 2512 is used to transfer the second part of the first pole piece 201 to the first winding part of the winding device 230.
  • the portion 201b is transferred to the second winding section of the winding device 230.
  • two parts of the first pole piece 201 are processed by two feeding parts respectively, so that the two parts of the first pole piece 201 can enter the roll respectively more stably and reliably.
  • the two winding parts in the winding device improve the winding effect of the two parts of the first pole piece 201 and thereby improve the performance of the two manufactured electrode assemblies.
  • the first feeding part 2511 may include: a first moving roller 2501 , a first driving member 2502 and a first transmission member 2503 .
  • the second feeding part 2512 may include: a second moving roller 2505, a second driving member 2506, and a second transmission member (not shown in the figure).
  • the first driving member 2502 is used to drive the first moving roller 2501 to press the first part 201a of the first pole piece 201 to the first transmission member 2503.
  • the first transmission member 2503 is used to press the first part 201a of the first pole piece 201.
  • a portion 201a is transferred to the first winding section of the winding device 230.
  • the second driving member 2506 is used to drive the second moving roller 2505 to press the second part 201b of the first pole piece 201 to the second transmission member, and the second transmission member is used to move the third part of the first pole piece 201
  • the two parts 201b are sent to the second winding part of the winding device 230.
  • the first transmission member 2503 may also be a roller structure. Relative to the first movable roller 2501, the first transmission member 2503 is a fixed roller, but the fixed roller can actively rotate to drive the first part 201a of the first pole piece 201 located on the fixed roller.
  • the first transmission member 2503 and the first moving roller 2501 are respectively located on both sides of the first part 201a of the first pole piece 201.
  • the first moving roller 2501 can move in a direction perpendicular to the first pole piece 201 under the driving action of the first driving member 2502 .
  • the first moving roller 2501 moves toward the first part 201a of the first pole piece 201, presses the first part 201a against the first transmission member 2503, and lifts the first transmission member 2503.
  • the transmission effect of the first part 201a is improved and the transmission stability of the first part 201a is improved.
  • the second driving member 2506 and the second transmission member in the second feeding part 2512 please refer to the first moving roller 2501 and the first moving roller 2501 in the first feeding part 2511 above.
  • the relevant description of the driving member 2502 and the first transmission member 2503 will not be described again here.
  • the first transmission member 2503 in the first feeding part 2511 and the second transmission member in the second feeding part 2512 may be two separate components.
  • the first transmission member 2503 and the second transmission member may also be integral components.
  • the first transmission member 2503 and the second transmission member are the same fixed roller. The fixed roller simultaneously corresponds to the first part 201a and the second part 201b of the first pole piece 201, and is opposite to the first part 201a. and second part 201b for transmission.
  • the first feeding device 251 in addition to the first feeding part 2511 and the second feeding part 2512 , it may also include: a clamping part 2513 for clamping the first pole. Part 1 of piece 201 201a and the second part 201b, so that the two parts can enter the subsequent two feeding parts relatively smoothly and stably.
  • the clamping part 2513 may be two clamping rollers, and the two clamping rollers are respectively disposed on both sides of the first part 201a and the second part 201b of the first pole piece 201 , which can not only play a good clamping role on the two parts, but also not cause great resistance to the transmission of the two parts.
  • the first feeding part 2511 and the second feeding part 2512 are composed of moving rollers, driving parts, transmission parts and other components.
  • the overall structure is easy to implement and has high reliability, and can make the first pole
  • the two parts of the sheet 201 are transferred to the winding device 230 smoothly and efficiently.
  • FIG. 6 is only for illustration, showing some components of the first feeding device 251.
  • the first feeding device 251 may also include other functions in related technologies. Components, such as cutting parts such as cutters, etc.
  • FIG. 7 shows another schematic structural diagram of the winding device 20 provided by an embodiment of the present application.
  • the winding equipment 20 may also include: a second unwinding device 212 for outputting the second pole piece 202 ; a second cutting device 260 disposed downstream of the second unwinding device 212 for outputting the second pole piece 202 .
  • the second pole piece 202 is cut along the length direction of the second pole piece 202 into a first part 202a and a second part 202b.
  • the above-mentioned winding device 230 is arranged downstream of the second cutting device 260, and the first winding part thereof is used to wind the first part 201a of the first pole piece 201 and the first part 202a of the second pole piece 202.
  • a first electrode assembly is formed, and the second winding portion is used to wind the second portion 201b of the first pole piece 201 and the second portion 202b of the second pole piece 202 to form a second electrode assembly.
  • the second unwinding device 212 may be provided with a rotatable shaft, and the second pole pieces 202 wound layer by layer are provided on the shaft.
  • the rotating shaft rotates under the action of the driving force
  • the second pole piece 202 wound on the rotating shaft is output in a flat state, and the second unwinding device 212 completes the unwinding action.
  • a conveying device may be provided downstream of the second unwinding device 212, such as one or more roller structures, conveyor belts, etc. wait.
  • the transfer device can penetrate multiple processing devices in the winding device 20 to realize flow transfer of the second pole piece 202 in the winding device 20 .
  • the second pole piece 202 After the second pole piece 202 is output by the second unwinding device 212, its shape in the winding device 20 is a strip shape.
  • the second pole piece 202 is a zigzag strip attached to a plurality of rollers.
  • the length direction of the second pole piece 202 is the length direction of the strip-shaped second pole piece 202 .
  • the length direction of the second pole piece 202 may also be the transmission direction of the second pole piece 202 .
  • the second cutting device 260 is disposed downstream of the second unwinding device 212 and is used to receive the second pole piece 202 output from the second unwinding device 212 and cut the second pole piece 202 along its length direction. Be the first part 202a and the second part 202b.
  • the second cutting device 260 may be a cutter, and the cutter is fixedly provided in the winding device 20 .
  • the cutter can cut the second pole piece 202 into the first part 202a and the second part 202b along the transmission direction of the second pole piece 202.
  • the winding device 230 is provided downstream of the first slitting device 220 and the second slitting device 260 .
  • the first cutting device 220 cuts the first pole piece 201 into the first part 201a and the second part 201b
  • the second cutting device 260 cuts the second pole piece 202 into the first part 202a and the second part 202b
  • the two first pole pieces 201 The part as well as the two parts of the second pole piece 202 can be conveyed by the conveyor device at the same time and reach the winding device 230 .
  • the first winding part in the winding device 230 is used to receive the first part 201a of the first pole piece 201 and the first part 202a of the second pole piece 202, and stack and wind the two to form the first electrode assembly.
  • the second winding part in the winding device 230 is used to receive the second part 201b of the first pole piece 201 and the second part 202b of the second pole piece 202, and perform stacking and winding on them, so as to A second electrode assembly is formed.
  • first part 201a and the second part 201b of the first pole piece 201 are the positive pole pieces of the two electrode assemblies
  • the first part 202a and the second part of the second pole piece 201 Part 202b is the negative electrode piece of the two electrode assemblies.
  • the first part 202a and the second part 202b of the second pole piece 201 are the positive poles of the two electrode assemblies. piece.
  • the winding equipment 20 simultaneously includes a first slitting device 220 and a second slitting device 260.
  • the first slitting device 220 can convert the first pole piece output from the first unwinding device 211. 201 is cut into two parts, and the second cutting device 260 can cut the second pole piece 202 output by the second unwinding device 212 into two parts. Then, the two parts of the first pole piece 201 and the two parts of the second pole piece 202 can be wound simultaneously by two winding parts in the winding device 230 to form two electrode assemblies.
  • the winding equipment 20 has high manufacturing efficiency for electrode assemblies, and can further reduce the required factory space, which is conducive to further increasing the ratio of land use and production capacity of the winding equipment 20, so as to increase the maximum production capacity that the factory can achieve.
  • FIG. 8 shows a schematic diagram of the second pole piece 202 before and after cutting according to an embodiment of the present application.
  • Figure 8(a) shows a schematic view of the second pole piece 201 before cutting
  • Figure 8(b) shows a schematic view of the second pole piece 202 after cutting.
  • the second pole piece 202 includes a second substrate 2021 and a second active coating area 2022 coated on the surface of the second substrate 2021.
  • the second active coating area 2022 is on the second pole.
  • Both sides of the piece 202 in the width direction respectively have second tab regions 2023 extending along the length direction of the second pole piece 202 .
  • the above-mentioned second cutting device 260 is used to cut in the second active coating area 2022 along the length direction of the second pole piece 202 to cut the second pole piece 202 into the first part 202a and the second part. 202b.
  • the second active coating area 2022 coated on the second substrate 2021 may be a positive active material layer.
  • the second substrate 2021 may be an aluminum substrate, and the second active coating area 2022 includes lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganate.
  • the second active coating area 2022 coated on the second substrate 2021 may be a negative active material layer.
  • the second substrate 2021 can be a copper substrate, and the second active coating area 2022 includes carbon or silicon.
  • the second substrate 2021 is coated with a second active coating area 2022, and the second active coating area 2022 has Two second tab areas 2023 , the second tab areas 2023 are areas on the second substrate 2021 that are not coated with the second active coating area 2022 .
  • the second active coating area 2022 and the two second tab areas 2023 are strip-shaped areas and extend along the length direction of the second pole piece 202 .
  • the length dimensions of the second active coating area 2022 and the two second tab areas 2023 can be The length is similar to or the same as the length of the first pole piece 201 .
  • the two second tab areas 2023 in the width direction of the second pole piece 202 , have the same size, and the two second tab areas 2023 cover to both edges of the second pole piece 202 in the width direction.
  • the width of the second tab area 2023 can be designed according to the actual required tab size of the electrode assembly, which is not specifically limited in the embodiment of the present application.
  • the second cutting device 260 may cut along the center line of the second active coating area 2022 in the length direction to form the first part 202a and the second part 202b of the same size.
  • the first part 202 a and the second part 202 b of the same size have the second active coating area 2022 of the same size and the tabs of the same size.
  • the first portion 202a and the second portion 202b of the same size can be used to be rolled to form an electrode assembly of the same size.
  • the second cutting device 260 can cut the second pole piece 202 into the first part 202a and the second part 202b of different sizes for winding to form electrode assemblies of different sizes.
  • the second pole piece 202 includes a second active coating area 2022 and two second tab areas 2023 located on both sides of the second active coating area 2022.
  • the second pole piece 202 is different from a single pole piece generally used to manufacture a single electrode assembly.
  • the second pole piece 202 includes two pole pieces used to manufacture two electrode assemblies (ie, the first part after cutting). 202a and Part II 202b).
  • the second pole piece 202 can be manufactured through the same coating process. Compared with the technical solution of manufacturing two monopole pieces separately through two coating processes, the production efficiency of the second pole piece 202 is higher.
  • FIG. 9 shows another schematic structural diagram of the winding device 20 provided by the embodiment of the present application.
  • the winding equipment 20 further includes: a third adjustment component 243 and/or a fourth adjustment component 244 , which are disposed between the above-mentioned second cutting device 260 and the winding device 230 .
  • the third adjustment component 243 is used to adjust the transmission parameters of the first part 202a of the second pole piece 202 in the winding device 20, and/or the fourth adjustment component 244 is used to adjust the third part of the second pole piece 202.
  • the transmission parameters of the second part 202b in the winding equipment 20 are adjusted.
  • the third adjustment component 243 and the fourth adjustment component 244 include: a correction component 2401; the correction component 2401 in the third adjustment component 243 is used to adjust the first part 202a of the second pole piece 202.
  • the third adjustment component 243 and/or the fourth adjustment component 244 respectively adjusting the transmission parameters of the first part 202a and/or the second part 202b of the second pole piece 202, it is possible to This makes the transmission of the first part 202a and/or the second part 202b in the winding device 20 more stable and improves the subsequent winding effect of the first part 202a and/or the second part 202b in the winding device 230, thereby improving Overall performance of the two prepared electrode assemblies.
  • the winding equipment 20 may also include: a second feeding device 252 , which is disposed upstream of the winding device 230 and is used to transfer the first part 202 a and the second part 202 b of the second pole piece 202 sent to the winding device 230.
  • a second feeding device 252 which is disposed upstream of the winding device 230 and is used to transfer the first part 202 a and the second part 202 b of the second pole piece 202 sent to the winding device 230.
  • the winding equipment 20 only includes one second unwinding device 212 , and the second pole piece output by the second unwinding device 212 is processed through the second cutting device 260 . 202 cut into two parts.
  • the winding equipment 20 may also include two second unwinding devices 212, and the second pole pieces 202 output by the two second unwinding devices 212 do not need to be cut.
  • FIG. 10 shows another schematic structural diagram of the winding device 20 provided by an embodiment of the present application.
  • the winding equipment 20 includes: two second unwinding devices 212 , each of the two second unwinding devices 212 is used to output the second pole piece 202 .
  • the above-mentioned winding device 230 is provided downstream of the two second unwinding devices 212.
  • the first winding part is used to wind the first part 201a of the first pole piece 201 and the second unwinding device 212.
  • the two pole pieces 202 are used to form the first electrode assembly, and the second winding part is used to wind the second part 201b of the first pole piece 201 and the second pole piece 202 from another second unwinding device 212 to form a second electrode assembly.
  • Electrode assembly Electrode assembly.
  • the two second pole pieces 202 provided on the two second unwinding devices 212 may be respectively the first part 202a and the second part 202b in the embodiment shown in FIG. 8 .
  • the second pole piece 202 is used to form a pole piece in a single electrode assembly.
  • the second pole piece 202 includes a second substrate 2021 and a second active coating area 2022 coated on the surface of the second substrate 2021,
  • the second active coating area 2022 has a second tab area 2023 extending along the length direction of the second pole piece 202 on one side of the second pole piece 202 in the width direction.
  • the winding equipment 20 includes two second unwinding devices 212, and the second pole pieces 202 provided on the two second unwinding devices 212 are pole pieces in a single electrode assembly, No cutting required.
  • the positions of the two second pole pieces 202 output by the two second unwinding devices 212 do not need to be significantly adjusted subsequently, so that the two second pole pieces 202 can be aligned with the second pole pieces 202 .
  • Two parts of a pole piece 201 are wound together to form two electrode assemblies. Therefore, through this technical solution, the transmission of the second pole piece 202 in the winding equipment 20 is more stable, and the performance and yield of the electrode assembly manufactured by the winding equipment 20 can be improved.
  • an adjustment component is provided downstream of the second unwinding device 212 .
  • the above-mentioned third adjustment component 243 and the fourth adjustment component 244 are respectively provided downstream of the two second unwinding devices 212 .
  • the third adjustment component 243 and the fourth adjustment component 244 are used to adjust the transmission parameters of the two second pole pieces 202 from the two second unwinding devices 212 in the winding device 20 .
  • FIG. 11 shows a schematic structural diagram of another winding device 20 provided by an embodiment of the present application.
  • the winding equipment 20 also includes: two third unwinding devices 213, each of the two third unwinding devices 213 The unwinding device 213 is used to output the first separator 203; two fourth unwinding devices 214, each of the two fourth unwinding devices 214 For outputting the second diaphragm 204.
  • the winding device 230 is provided downstream of the two third unwinding devices 213 and the two fourth unwinding devices 214.
  • the first winding part is used to wind the first part 201a of the first pole piece 201, from The first separator 203 of a third unwinding device 213 and the second separator 204 from a fourth unwinding device 214 form the first electrode assembly;
  • the second winding part is used to wind the second separator of the first pole piece 201
  • the portion 201b, the first separator 203 from another third unwinding device 213 and the second separator 204 from another fourth unwinding device 214 form a second electrode assembly.
  • each winding part in the winding device 230 can receive four incoming materials, namely the first separator 203, the second separator 204, a part of the first pole piece 201 and the second pole piece. part of 202.
  • Figure 12 shows a schematic structural diagram of a winding device 230 provided by an embodiment of the present application.
  • the first winding part 231 and the second winding part 232 in the winding device 230 are arranged along the axial direction of the winding device 230 .
  • the first winding part 231 in the winding device 230 is used to simultaneously receive a first diaphragm 203, the first part 201a of the first pole piece 201, a second diaphragm 204, and the first part 202a of the second pole piece 202, And wind the four incoming materials.
  • the second winding part 232 parallel to the first winding part 231 is used to simultaneously receive another first diaphragm 203, the second part 201b of the first pole piece 201, another second diaphragm 204, and The second part 202b of the second pole piece 202 is wound with the four incoming materials.
  • two first separators 203 are output through two third unwinding devices 213, and two second separators 204 are output through two fourth unwinding devices 214.
  • the two first separators 203 and the two second separators 204 can be simultaneously transferred to the two winding parts in the winding device 230 to be wound simultaneously with the two parts of the first pole piece to form two electrode assemblies with stable performance and reliable use. , and the manufacturing efficiency of the electrode assembly is higher.
  • the winding equipment 20 also includes: a first merging device 271, which is disposed between the two third unwinding devices 213 and the winding device 230.
  • the first merging device 271 includes two first rotating parts (not shown in the figure) provided on the same roller. The two first rotating parts correspond to the two third unwinding devices 213 and the winding device 230 one by one. In the two winding parts, each first rotating part is used to transfer the first diaphragm 203 from the corresponding third unwinding device 213 to the corresponding winding part; and/or,
  • the second merging device 272 is disposed between the two fourth unwinding devices 214 and the winding device 230.
  • the second merging device 272 includes two second rotating parts (not shown in the figure) disposed on the same roller. ), the two second rotating parts correspond one-to-one to the two fourth unwinding devices 214 and the two winding parts in the winding device 230, and each second rotating part is used to transfer data from the corresponding fourth unwinding device.
  • the second membrane 204 of the device 214 is conveyed to the corresponding winding section.
  • Figure 13 shows a schematic structural diagram of the first merging device 271 provided by an embodiment of the present application.
  • the first merging device 271 includes: a fixed part 2712 , a passing roller 2713 , and two mutually separated first rotating parts 2711 provided on the passing roller 2713 .
  • One end of the roller 2713 in the axial direction is fixed to the fixed part 2712.
  • the two first rotating parts 2711 are two separation bearing positions on the roller 2713, used to respectively receive the two separated first diaphragms 203.
  • the two first rotating parts 2711 correspond to the two third unwinding devices 213 one by one
  • the two The first rotating part 2711 corresponds to the two winding parts in the winding device 230 , that is, the first winding part 231 and the second winding part 232 .
  • a first rotating part 2711 and its corresponding third unwinding device 213 and winding part form a set of winding components for winding a first separator 203 to a winding part.
  • the specific structure of the second merging device 272 may be the same as the above-mentioned first merging device 271.
  • first merging device 272 For specific related technical solutions, please refer to the above description and will not be described again here.
  • the two first separators 203 can be transported to the two winding parts in the winding device 230 through the same first merging device 271.
  • the two second separators 204 can also be conveyed through the same first merging device 271.
  • the same second merging device 272 is delivered to both winding sections in the winding device 230 .
  • Figure 14 shows another schematic structural diagram of the winding device 20 provided by an embodiment of the present application.
  • the winding equipment 20 also includes:
  • the two fifth adjustment components 245 correspond to the two third unwinding devices 213 one by one, and are arranged between the first merging device 271 and the two third unwinding devices 213.
  • the fifth adjusting components 245 are used to adjust the third unwinding devices 213.
  • the transmission parameters of a diaphragm 203 in the winding device 20 are adjusted; and/or,
  • Two sixth adjustment components 246 correspond to the two fourth unwinding devices 214 one by one and are disposed between the second merging device 272 and the two fourth unwinding devices 214.
  • the sixth adjusting components 246 are used to adjust the fourth unwinding devices 214.
  • the transmission parameters of the second diaphragm 204 in the winding device 20 are adjusted.
  • the fifth adjustment component 245 and the sixth adjustment component 246 include: a tension adjustment component 2402; the tension adjustment component 2402 in the fifth adjustment component 245 is used to detect and adjust the tension of the first diaphragm 203 ; The tension adjustment component 2402 in the sixth adjustment component 246 is used to detect and adjust the tension of the second diaphragm 204.
  • the first diaphragm 203 can be adjusted by adjusting the transmission parameters of the first diaphragm 203 and/or the second diaphragm 204 through the fifth adjustment component 245 and/or the sixth adjustment component 246, the first diaphragm 203 can be
  • the transmission of the second diaphragm 204 and/or the second diaphragm 204 in the winding device 20 is more stable and the subsequent winding effect of the first diaphragm 203 and/or the second diaphragm 204 in the winding device 230 is improved, thereby improving the two prepared products. overall performance of the electrode assembly.
  • the winding equipment 20 includes: a second unwinding device 212 and a second cutting device 260 as shown in Figure 7 or Figure 9, as In an alternative embodiment, the winding equipment 20 may also include two second unwinding devices 212 as shown in FIG. 10 .
  • the relevant technical solutions of other device components in the winding equipment 20 can be found in As described above, no further details will be given here.
  • the first cutting device 220 cuts the first pole piece 201 into two parts as an example.
  • the first cutting device 220 can also cut the first pole piece 201 into two parts.
  • the winding device 230 can wind three or more parts of the first pole pieces at the same time, so as to Three or more electrode assemblies are manufactured simultaneously.
  • the specific solution of this implementation mode can be obtained based on the technical solution of the above-mentioned application embodiment, and will not be described in detail herein.
  • the winding device 20 of the embodiment of the present application is described above.
  • the winding method 30 of the embodiment of the present application will be described below, and the parts not described in detail can be referred to the aforementioned embodiments.
  • Figure 15 shows a schematic flow chart of a winding method 30 provided by an embodiment of the present application.
  • the winding method 30 includes the following steps.
  • S320 Cut the first pole piece 201 into a first part 201a and a second part 201b along the length direction of the first pole piece 201.
  • S330 Wind the first portion 201a of the first pole piece 201 to form a first electrode assembly, and wind the second portion 201b of the first pole piece 201 to form a second electrode assembly.
  • the first pole piece 201 includes a first substrate 2011 and two first active coating areas 2012 coated on the surface of the first substrate 2011.
  • the two first active coating areas The regions 2012 are respectively located on both sides of the first pole piece 201 in the width direction, and there is a first tab region 2013 extending along the length direction of the first pole piece 201 between the two first active coating regions 2012 .
  • the above step S320 may include: cutting in the first tab area 2013 along the length direction of the first pole piece 201 to cut the first pole piece 201 into the first part 201a and the second part 201b.
  • the above "cutting in the first tab area 2013 along the length direction of the first pole piece 201 to cut the first pole piece 201 into the first part 201a and the second part 201b" may include : Cut in the first tab area 2013 along the first cutting line 2211 extending toward the length direction of the first pole piece 201 to obtain the first portion 201a of the first pole piece 201 and form the first portion of the first pole piece 201 At least one tab of 201a; cut in the first tab area 2013 along the second cutting line 2221 extending toward the length direction of the first pole piece 201 to obtain the second portion 201b of the first pole piece 201 and form the first pole piece 201. At least one pole lug of the second part 201b of a pole piece 201.
  • Figure 16 shows another schematic flow chart of the winding method 30 provided by an embodiment of the present application.
  • the winding method 30 may also include the following steps.
  • step S330 may include the following step S331.
  • S331 Wind the first part 201a of the first pole piece 201 and the first part 202a of the second pole piece 202 to form the first electrode assembly, and at the same time, wind the second part 201b of the first pole piece 201 and the second pole piece 202 The second portion 202b is wound to form a second electrode assembly.
  • the second pole piece 202 includes a second substrate 2021 and a second active coating area 2022 coated on the surface of the second substrate 2021.
  • the second active coating area 2022 is on the first Both sides of the second pole piece 202 in the width direction respectively have second tab regions 2023 extending along the length direction of the second pole piece 202 .
  • the above step S350 may include: along the length direction of the second pole piece 202, in the second active Cutting is performed in the coating area 2022 to cut the second pole piece 202 into a first part 202a and a second part 202b.
  • Figure 17 shows another schematic flow chart of the winding method 30 provided by an embodiment of the present application.
  • the winding method 30 may also include the following steps.
  • step S330 may include the following step S332.
  • S332 Wind the first part 201a of the first pole piece 201 and one of the two second pole pieces 202 to form the first electrode assembly, and at the same time, wind the second part 201b of the first pole piece 201 And the other second pole piece 202 of the two second pole pieces 202 is rolled to form a second electrode assembly.
  • the second pole piece 202 includes a second substrate 2021 and a second active coating area 2022 coated on the surface of the second substrate 2021.
  • the second active coating area 2022 is on One side of the second pole piece 202 in the width direction has a second tab region 2023 extending along the length direction of the second pole piece 202 .

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Abstract

本申请实施例提供一种卷绕设备和方法，能够提高卷绕设备对电极组件的加工效率，以提高电池的生产产能。卷绕设备（20）包括：第一放卷装置（211），用于输出第一极片（201）；第一分切装置（220），设置于第一放卷装置（211）的下游，用于沿第一极片（201）的长度方向将第一极片（201）切割为第一部分（201a）和第二部分（201b）；卷绕装置（230），设置于第一分切装置（220）的下游，且具有能够同时卷绕运动的第一卷绕部和第二卷绕部，第一卷绕部用于卷绕第一极片（201）的第一部分（201a）以形成第一电极组件，第二卷绕部用于卷绕第一极片（201）的第二部分（201b）以形成第二电极组件。

Description

卷绕设备和方法
相关申请的交叉引用
本申请要求享有于2022年03月18日提交的名称为“卷绕设备和方法”的中国专利申请202210271281.9的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本申请实施例涉及机械领域，并且更具体地，涉及一种卷绕设备和方法。
背景技术
节能减排是汽车产业可持续发展的关键，电动车辆由于其节能环保的优势已成为汽车产业可持续发展的重要组成部分。对于电动车辆而言，电池技术又是关乎其发展的一项重要因素。
通常，电池由一个或多个电池单体组成，每个电池单体中包括电极组件，且该电极组件由正极片、负极片以及隔膜组成。在一些相关技术中，能够通过卷绕设备将该正极片、负极片以及隔膜进行卷绕以形成卷绕式的电极组件。如何提高卷绕设备对电极组件的加工效率，以提高电池的生产产能，是一项亟待解决的技术问题。
发明内容
本申请提供一种卷绕设备和方法，能够提高卷绕设备对电极组件的加工效率，以提高电池的生产产能。
第一方面，提供一种卷绕设备，包括：第一放卷装置，用于输出第一极片；第一分切装置，设置于第一放卷装置的下游，用于沿第一极片的长度方向将第一极片切割为第一部分和第二部分；卷绕装置，设置于第一分切装置的下游，且具有能够同时卷绕运动的第一卷绕部和第二卷绕部，第一卷绕部用于卷绕第一极片的第一部分以形成第一电极组件，第二卷绕部用于卷绕第一极片的第二部分以形成第二电极组件。
通过本申请实施例的技术方案，在卷绕设备中，仅需提供一个第一放卷装置，配合于第一分切装置以及卷绕装置，即能实现同时制造得到两个电极组件。该卷绕设备对电极组件的制造效率较高，且不会占用较大的厂房空间，有利于提升卷绕设备使用用地和产能的比值，提高了厂房能够实现的最大产能。
在一些可能的实施方式中，第一极片包括第一基片以及涂覆于第一基片的表面的两个第一活性涂层区，两个第一活性涂层区分别位于第一极片在宽度方向上的两侧，两个第一活性涂层区之间具有沿第一极片的长度方向延伸的第一极耳区；第一分切装 置用于沿第一极片的长度方向在第一极耳区中切割，以将第一极片切割为第一部分和第二部分。
通过该实施方式的技术方案，第一极片包括两个第一活性涂层区以及位于该两个第一活性涂层区之间的第一极耳区。对于该第一极片，其不同于一般用于制造单个电极组件的单个极片，该第一极片中包括用于制造两个电极组件的两个极片(即切割之后的第一部分和第二部分)。对于该第一极片，可以通过同一道涂覆工艺制造得到，相比于通过两道涂覆工艺分别制造两个单极片的技术方案，该第一极片的生产效率更高。
在一些可能的实施方式中，第一分切装置包括：第一分切部和第二分切部；其中，第一分切部用于在第一极耳区中切割，以形成第一极片的第一部分的至少一个极耳，第二分切部用于在第一极耳区中切割，以形成第一极片的第二部分的至少一个极耳。
通过该实施方式的技术方案，在第一分切装置中设置第一分切部和第二分切部，能够针对具体需求制造得到尺寸更小且精度更高的第一极片的第一部分的极耳和第一极片的第二部分的极耳，不仅有利于电极组件后续制造工艺的进行，例如，对卷绕后的电极组件中极耳的处理等等，还能提高电极组件的整体性能。
在一些可能的实施方式中，卷绕设备还包括：第一调整组件和/或第二调整组件，设置于第一分切装置与卷绕装置之间；其中，第一调整组件用于对第一极片的第一部分在卷绕设备中的传动参数进行调整，和/或，第二调整组件用于对第一极片的第二部分在卷绕设备中的传动参数进行调整。
在该实施方式的技术方案中，通过该第一调整组件和/或第二调整组件对第一极片的第一部分和/或第二部分的传动参数的调整，可以使得该第一部分和/或第二部分在卷绕设备中的传动更为稳定，且提升后续该第一部分和/或第二部分在卷绕装置中的卷绕效果，从而提升制备得到的两个电极组件的整体性能。
在一些可能的实施方式中，第一调整组件和第二调整组件包括：纠偏组件；第一调整组件中的纠偏组件用于调整第一极片的第一部分在卷绕设备中的相对位置；第二调整组件中的纠偏组件用于调整第一极片的第二部分在卷绕设备中的相对位置；和/或，第一调整组件和第二调整组件包括：张力调节组件；第一调整组件中的张力调节组件用于检测并调整第一极片的第一部分的张力；第二调整组件中的张力调节组件用于检测并调整第一极片的第二部分的张力。
在该实施方式的技术方案中，通过在第一调整组件和第二调整组件中分别设置纠偏组件和张力调节组件，可以使得该两个纠偏组件和两个张力调节组件能够更有针对性的分别对第一极片的第一部分和第二部分在卷绕设备中的相对位置和张力进行调整，且调整结果更为精准，有利于提高该第一极片的第一部分和第二部分在卷绕装置中的卷绕效果。
在一些可能的实施方式中，卷绕设备还包括：第一入料部和第二入料部，设置于卷绕装置的上游；其中，第一入料部用于将第一极片的第一部分传送至卷绕装置的第一卷绕部，第二入料部用于将第一极片的第二部分传送至卷绕装置的第二卷绕部。
在该实施方式的技术方案中，通过两个入料部分别对第一极片的两部分进行处理，能够使得该第一极片的两部分能够更为稳定且可靠的分别进入卷绕装置中的两个卷绕部，提升第一极片的两部分的卷绕效果从而提升制造得到的两个电极组件的性能。
在一些可能的实施方式中，第一入料部包括：第一动辊、第一驱动件和第一传动件，第二入料部包括：第二动辊、第二驱动件和第二传动件；其中，第一驱动件用于驱动第一动辊将第一极片的第一部分压附于第一传动件，第一传动件用于将第一极片的第一部分传送至第一卷绕部；第二驱动件用于驱动第二动辊将第一极片的第二部分压附于第二传动件，第二传动件用于将第一极片的第二部分传送至第二卷绕部。
在该实施方式的技术方案中，第一入料部和第二入料部由动辊、驱动件以及传动件组成，整体结构便于实现且可靠性较高，能够将第一极片的两个部分平稳有效的传送至卷绕装置中。
在一些可能的实施方式中，卷绕设备还包括：第二放卷装置，用于输出第二极片；第二分切装置，设置于第二放卷装置的下游，用于沿第二极片的长度方向将第二极片切割为第一部分和第二部分；卷绕装置，设置于第二分切装置的下游，第一卷绕部用于卷绕第一极片的第一部分以及第二极片的第一部分以形成第一电极组件，第二卷绕部用于卷绕第一极片的第二部分以及第二极片的第二部分以形成第二电极组件。
通过该实施方式的技术方案，在卷绕设备中，仅需提供一个第一放卷装置和一个第二放卷装置，配合于第一分切装置、第二分切装置以及卷绕装置，即能实现同时制造得到两个电极组件。该卷绕设备对电极组件的制造效率较高，且能够进一步降低所需占用的厂房空间，有利于进一步提升卷绕设备使用用地和产能的比值，以提高厂房能够实现的最大产能。
在一些可能的实施方式中，第二极片包括第二基片以及涂覆于第二基片的表面的第二活性涂层区，第二活性涂层区在第二极片的宽度方向上的两侧分别具有沿第二极片的长度方向延伸的第二极耳区；第二分切装置用于沿第二极片的长度方向在第二活性涂层区中切割，以将第二极片切割为第一部分和第二部分。
通过该实施方式的技术方案，第二极片包括第二活性涂层区以及位于该第二活性涂层区两侧的两个第二极耳区。对于该第二极片，其不同于一般用于制造单个电极组件的单个极片，该第二极片中包括用于制造两个电极组件的两个极片(即切割之后的第一部分和第二部分)。对于该第二极片，可以通过同一道涂覆工艺制造得到，相比于通过两道涂覆工艺分别制造两个单极片的技术方案，该第二极片的生产效率更高。
在一些可能的实施方式中，卷绕设备还包括：第三调整组件和/或第四调整组件，设置于第二分切装置与卷绕装置之间；其中，第三调整组件用于对第二极片的第一部分在卷绕设备中的传动参数进行调整，和/或，第四调整组件用于对第二极片的第二部分在卷绕设备中的传动参数进行调整。
在该实施方式的技术方案中，通过该第三调整组件和/或第四调整组件分别对第二极片的第一部分和/或第二部分的传动参数的调整，可以使得该第一部分和/或第二部分在卷绕设备中的传动更为稳定，且提升后续该第一部分和/或第二部分在卷绕装置中的卷绕效果，从而提升制备得到的两个电极组件的整体性能。
在一些可能的实施方式中，第三调整组件和第四调整组件包括：纠偏组件；第三调整组件中的纠偏组件用于调整第二极片的第一部分在卷绕设备中的相对位置；第四调整组件中的纠偏组件用于调整第二极片的第二部分在卷绕设备中的相对位置；和/或，第三调整组件和第四调整组件包括：张力调节组件；第三调整组件中的张力调节组件用于检测并调整第二极片的第一部分的张力；第四调整组件中的张力调节组件用于检测并调整第二极片的第二部分的张力。
在一些可能的实施方式中，卷绕设备还包括：两个第二放卷装置，两个第二放卷装置中的每个第二放卷装置用于输出第二极片；卷绕装置，设置于两个第二放卷装置的下游，第一卷绕部用于卷绕第一极片的第一部分以及来自一个第二放卷装置的第二极片以形成第一电极组件，第二卷绕部用于卷绕第一极片的第二部分以及来自另一个第二放卷装置的第二极片以形成第二电极组件。
在该实施方式的技术方案中，卷绕设备包括两个第二放卷装置，且该两个第二放卷装置上设置的第二极片为单个电极组件中的极片，不需要经过切割。在该实施方式下，后续对该两个第二放卷装置输出的两个第二极片的位置不需要进行大幅度的调整，也能使得该两个第二极片能够与第一极片的两个部分相互配合卷绕，形成两个电极组件。因此，通过该技术方案，第二极片在卷绕设备中的传动更为稳定，通过该卷绕设备制造得到的电极组件的性能以及良率能够得到提升。
在一些可能的实施方式中，第二极片包括第二基片以及涂覆于第二基片的表面的第二活性涂层区，第二活性涂层区在第二极片的宽度方向上的一侧具有沿第二极片的长度方向延伸的第二极耳区。
在一些可能的实施方式中，卷绕设备还包括：两个第三放卷装置，两个第三放卷装置中的每个第三放卷装置用于输出第一隔膜；两个第四放卷装置，两个第四放卷装置中的每个第四放卷装置用于输出第二隔膜；卷绕装置，设置于两个第三放卷装置以及两个第四放卷装置的下游，第一卷绕部用于卷绕第一极片的第一部分、来自一个第三放卷装置的第一隔膜以及来自一个第四放卷装置的第二隔膜以形成第一电极组件；第二卷绕部用于卷绕第一极片的第二部分、来自另一个第三放卷装置的第一隔膜以及来自另一个第四放卷装置的第二隔膜以形成第二电极组件。
在该实施方式的技术方案中，通过两个第三放卷装置输出两个第一隔膜，以及两个第四放卷装置输出两个第二隔膜，该两个第一隔膜以及两个第二隔膜能够同时传送至卷绕装置中的两个卷绕部，以与第一极片的两个部分同时卷绕，形成性能稳定且能够可靠使用的两个电极组件，且电极组件的制造效率较高。
在一些可能的实施方式中，卷绕设备还包括：第一合并装置，设置于两个第三放卷装置以及卷绕装置之间，第一合并装置包括设置于同一辊上的两个第一转动部，两个第一转动部一一对应于两个第三放卷装置以及卷绕装置中的两个卷绕部，每个第一转动部用于将来自对应的第三放卷装置的第一隔膜传送至对应的卷绕部；和/或，第二合并装置，设置于两个第四放卷装置以及卷绕装置之间，第二合并装置包括设置于同一辊上的两个第二转动部，两个第二转动部一一对应于两个第四放卷装置以及卷绕装置中的两个卷绕部，每个第二转动部用于将来自对应的第四放卷装置的第二隔膜传 送至对应的卷绕部。
通过该实施方式的技术方案，两个第一隔膜可以通过同一个第一合并装置传送至卷绕装置中的两个卷绕部，类似地，两个第二隔膜也可以通过同一个第二合并装置传送至卷绕装置中的两个卷绕部。在该实施方式中，不需要通过多个装置分别将两个第一隔膜传送至卷绕装置，也不需要多个装置分别将两个第二隔膜传送至卷绕装置，从而可以减少卷绕设备中装置的数量，进一步降低卷绕设备所需占用的厂房空间。
在一些可能的实施方式中，卷绕设备还包括：两个第五调整组件，一一对应于两个第三放卷装置，且设置于第一合并装置与两个第三放卷装置之间，第五调整组件用于对第一隔膜在卷绕设备中的传动参数进行调整；和/或，两个第六调整组件，一一对应于两个第四放卷装置，且设置于第二合并装置与两个第四放卷装置之间，第六调整组件用于对第二隔膜在卷绕设备中的传动参数进行调整。
在本申请实施例的技术方案中，通过该第五调整组件和/或第六调整组件对第一隔膜和/或第二隔膜的传动参数的调整，可以使得该第一隔膜和/或第二隔膜在卷绕设备中的传动更为稳定且提升后续该第一隔膜和/或第二隔膜在卷绕装置中的卷绕效果，从而提升制备得到的两个电极组件的整体性能。
在一些可能的实施方式中，第五调整组件和第六调整组件包括：张力调节组件；第五调整组件中的张力调节组件用于检测并调整第一隔膜的张力；第六调整组件中的张力调节组件用于检测并调整第二隔膜的张力。
第二方面，提供一种卷绕方法，包括：输出第一极片；沿第一极片的长度方向将第一极片切割为第一部分和第二部分；对第一极片的第一部分进行卷绕以形成第一电极组件，同时对第一极片的第二部分进行卷绕以形成第二电极组件。
在一些可能的实施方式中，第一极片包括第一基片以及涂覆于第一基片的表面的两个第一活性涂层区，两个第一活性涂层区分别位于第一极片在宽度方向上的两侧，两个第一活性涂层区之间具有沿第一极片的长度方向延伸的第一极耳区；其中，沿第一极片的长度方向将第一极片切割为第一部分和第二部分，包括：沿第一极片的长度方向在第一极耳区中切割，以将第一极片切割为第一部分和第二部分。
在一些可能的实施方式中，沿第一极片的长度方向在第一极耳区中切割，以将第一极片切割为第一部分和第二部分，包括：沿朝向第一极片的长度方向延伸的第一切割线在第一极耳区中切割，以得到第一极片的第一部分并形成第一极片的第一部分的至少一个极耳；沿朝向第一极片的长度方向延伸的第二切割线在第一极耳区中切割，以得到第一极片的第二部分并形成第一极片的第二部分的至少一个极耳。
在一些可能的实施方式中，卷绕方法还包括：输出第二极片；沿第二极片的长度方向将第二极片切割为第一部分和第二部分；对第一极片的第一部分进行卷绕以形成第一电极组件，同时对第一极片的第二部分进行卷绕以形成第二电极组件，包括：对第一极片的第一部分以及第二极片的第一部分进行卷绕以形成第一电极组件，同时对第一极片的第二部分以及第二极片的第二部分进行卷绕以形成第二电极组件。
在一些可能的实施方式中，第二极片包括第二基片以及涂覆于第二基片的表面的第二活性涂层区，第二活性涂层区在第二极片的宽度方向上的两侧分别具有沿第二 极片的长度方向延伸的第二极耳区；沿第二极片的长度方向将第二极片切割为第一部分和第二部分，包括：沿第二极片的长度方向在第二活性涂层区中切割，以将第二极片切割为第一部分和第二部分。
在一些可能的实施方式中，卷绕方法还包括：输出两个第二极片；对第一极片的第一部分进行卷绕以形成第一电极组件，同时对第一极片的第二部分进行卷绕以形成第二电极组件，包括：对第一极片的第一部分以及两个第二极片中的一个第二极片进行卷绕以形成第一电极组件，同时对第一极片的第二部分以及两个第二极片中的另一个第二极片进行卷绕以形成第二电极组件。
在一些可能的实施方式中，第二极片包括第二基片以及涂覆于第二基片的表面的第二活性涂层区，第二活性涂层区在第二极片的宽度方向上的一侧具有沿第二极片的长度方向延伸的第二极耳区。
通过本申请实施例的技术方案，在卷绕设备中，仅需提供一个第一放卷装置，配合于第一分切装置以及卷绕装置，即能实现同时制造得到两个电极组件。该卷绕设备对电极组件的制造效率较高，且不会占用较大的厂房空间，有利于提升卷绕设备使用用地和产能的比值，提高了厂房能够实现的最大产能。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对本申请实施例中所需要使用的附图作简单地介绍，显而易见地，下面所描述的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据附图获得其他的附图。
图1是本申请一实施例提供的电池单体的结构示意图；
图2是本申请一实施例提供的卷绕设备的一种结构示意图；
图3是本申请一实施例提供的第一极片在切割前后的示意图；
图4是本申请一实施例提供的第一分切装置对第一极片的切割示意图；
图5是本申请一实施例提供的卷绕设备的另一结构示意图；
图6是本申请一实施例提供的第一入料装置的结构示意图；
图7是本申请一实施例提供的卷绕设备的另一结构示意图；
图8是本申请一实施例提供的第二极片在切割前后的示意图；
图9是本申请一实施例提供的卷绕设备的另一结构示意图；
图10是本申请一实施例提供的卷绕设备的另一结构示意图；
图11是本申请一实施例提供的卷绕设备的另一结构示意图；
图12是本申请一实施例提供的卷绕装置的结构示意图；
图13是本申请一实施例提供的第一合并装置的结构示意图；
图14是本申请一实施例提供的卷绕设备的另一结构示意图；
图15是本申请一实施例提供的卷绕方法的一种示意性流程框图；
图16是本申请一实施例提供的卷绕方法的另一示意性流程框图；
图17是本申请一实施例提供的卷绕方法的另一示意性流程框图。
在附图中，附图并未按照实际的比例绘制。
具体实施方式
下面结合附图和实施例对本申请的实施方式作进一步详细描述。以下实施例的详细描述和附图用于示例性地说明本申请的原理，但不能用来限制本申请的范围，即本申请不限于所描述的实施例。
在本申请的描述中，需要说明的是，除非另有说明，“多个”的含义是两个以上；术语“上”、“下”、“左”、“右”、“内”、“外”等指示的方位或位置关系仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”、“第三”等仅用于描述目的，而不能理解为指示或暗示相对重要性。“垂直”并不是严格意义上的垂直，而是在误差允许范围之内。“平行”并不是严格意义上的平行，而是在误差允许范围之内。
下述描述中出现的方位词均为图中示出的方向，并不是对本申请的具体结构进行限定。在本申请的描述中，还需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是直接相连，也可以通过中间媒介间接相连。对于本领域的普通技术人员而言，可视具体情况理解上述术语在本申请中的具体含义。
本申请中术语“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：存在A，同时存在A和B，存在B这三种情况。另外，本申请中字符“/”，一般表示前后关联对象是一种“或”的关系。
除非另有定义，本申请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；本申请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。本申请的说明书和权利要求书或上述附图中的术语“第一”、“第二”等是用于区别不同对象，而不是用于描述特定顺序或主次关系。
在本申请中提及“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，本申请所描述的实施例可以与其它实施例相结合。
本申请中，电池是指包括一个或多个电池单体以提供电能的物理模块。例如，本申请中所提到的电池可以包括电池模组或电池包等。电池一般包括用于封装一个或多个电池单体的箱体。箱体可以避免液体或其他异物影响电池单体的充电或放电。
可选地，电池单体可以包括锂离子二次电池、锂离子一次电池、锂硫电池、钠锂离子电池、钠离子电池或镁离子电池等，本申请实施例对此并不限定。在一些实施 方式中，电池单体也可称之为电芯。
电池单体包括电极组件和电解液，电极组件由正极片、负极片和隔膜组成。电池单体主要依靠金属离子在正极片和负极片之间移动来工作。正极片包括正极集流体和正极活性物质层，正极活性物质层涂覆于正极集流体的表面，未涂敷正极活性物质层的集流体凸出于已涂覆正极活性物质层的集流体，未涂敷正极活性物质层的集流体作为正极极耳。以锂离子电池为例，正极集流体的材料可以为铝，正极活性物质可以为钴酸锂、磷酸铁锂、三元锂或锰酸锂等。负极片包括负极集流体和负极活性物质层，负极活性物质层涂覆于负极集流体的表面，未涂敷负极活性物质层的集流体凸出于已涂覆负极活性物质层的集流体，未涂敷负极活性物质层的集流体作为负极极耳。负极集流体的材料可以为铜，负极活性物质可以为碳或硅等。为了保证通过大电流而不发生熔断正极极耳的数量为多个且层叠在一起，负极极耳的数量为多个且层叠在一起。隔膜的材质可以为聚丙烯(Polypropylene，PP)或聚乙烯(Polyethylene，PE)等。
在一些相关技术中，电池单体的电极组件为卷绕式结构。可选地，该卷绕式结构的电极组件整体可呈现圆柱形，该圆柱形的电极组件配合于圆柱形的壳体，整体可形成圆柱形的电池单体。
具体地，平展状态下的正极片、负极片以及隔膜相互层叠设置后，再经过卷绕装置进行卷绕后，能够形成上述卷绕式电极组件。在通常的技术方案中，卷绕装置对一组正极片、负极片以及隔膜进行卷绕，形成一个电极组件，完成该一个电池组件后，再继续对一组正极片、负极片以及隔膜进行卷绕形成下一个电池组件。该技术方案的电池组件的生产效率较低，不利于提高电池单体以及电池的生产效率。
在一些改进的技术方案中，卷绕装置能够同时对两组正极片、负极片以及隔膜进行卷绕，形成两个电极组件。虽然该技术方案能够提高电极组件的生产效率，但在生产制造过程中，需要设置两组用于放置正极片、负极片以及隔膜的装置，因而需要占用较大的厂房空间。
鉴于此，本申请提供一种卷绕设备，其中包括放卷装置、分切装置和卷绕装置。其中，放卷装置用于提供极片，分切装置用于将极片切割为第一部分和第二部分。卷绕装置包括：能够同时卷绕运动的第一卷绕部和第二卷绕部，该第一卷绕部用于卷绕第一极片的第一部分以形成第一电极组件，第二卷绕部用于卷绕第一极片的第二部分以形成第二电极组件。通过该技术方案，放卷装置提供的极片能够被分切装置切割为两部分，且该两部分能够分别被卷绕装置的两个卷绕部卷绕形成两个电极组件。因此，在该卷绕设备中，仅需提供一个放卷装置，也能实现同时卷绕得到两个电极组件，该卷绕设备的制造效率较高，且不会占用较大的厂房空间。
图1示出了本申请一实施例提供的电池单体10的结构示意图。
如图1所示，该电池单体10可以包括壳体110和电极组件120，其中，电极组件120容纳于壳体110中，壳体110的形状可根据该电极组件120的形状而定。作为示例，如图1所示，电极组件120为圆柱状，其可由正极片、隔膜、负极片(图中未示出)层叠卷绕后形成。壳体110为适配于该电极组件120的中空圆柱状壳体。另外，壳体110的至少一个面具有开口以便电极组件120放置于壳体110内。例如，如图1所 示，在中空圆柱状的壳体110中，该壳体110两端的端面均具有开口。
除了壳体110和电极组件120以外，电池单体10还可以包括端盖组件，以覆盖壳体110中的开口。如图1所示，电池单体10包括第一端盖组件130a和第二端盖组件130b，该两个端盖组件分别覆盖中空圆柱状的壳体110的两端，并与壳体110连接，以形成容纳电极组件120的封闭的腔体。该封闭的腔体除了容纳有电极组件120以外，还填充有电解质，例如电解液。
作为示例，在图1所示实施例中，第一端盖组件130a包括第一端盖131a和第一电极端子132a，该第一电极端子132a可以安装固定于第一端盖131a上。可以理解的是，第二端盖组件130b同样可以包括第二端盖和第二电极端子。该第二端盖组件130b中的第二电极端子和上述第一端盖组件130a中的第一电极端子132a为极性相反的两个电极端子，例如，第一电极端子132a为正极电极端子时，第二电极端子为负极电极端子。
在第一端盖组件130a和第二端盖组件130b中，除了端盖和电极端子以外，还可以包括连接构件(图1中未示出)，或者该连接构件也可以称为集流构件，用于将电池单体10内部的电极组件120和电极端子实现电连接。
在电池单体10中，电极组件120可以具有两个极性相反的第一极耳121a和第二极耳121b。例如，当第一极耳121a为正极极耳时，第二极耳121b为负极极耳。作为示例，在图1所示实施例中，第一极耳121a和第二极耳121b分别位于圆柱形的电极组件120的两个端面。具体地，当多层正极片、隔膜、负极片层叠卷绕形成圆柱形结构后，可通过相关工艺对圆柱形的两个端面进行处理，以形成该两个极耳。
具体地，在图1所示实施例中，电极组件120的第一极耳121a可通过一个集流构件与第一端盖组件130a中的第一电极端子132a连接，相应的，电极组件120的第二极耳121b可通过另一个连接构件与第二端盖组件130b中的第二电极端子连接。
图2示出了本申请一实施例提供的卷绕设备20的示意性结构图。
如图2所示，该卷绕设备20包括：第一放卷装置211，用于输出第一极片201；第一分切装置220，设置于第一放卷装置211的下游，用于沿第一极片201的长度方向将该第一极片201切割为第一部分201a和第二部分201b；卷绕装置230，设置于第一分切装置220的下游，且具有能够同时卷绕运动的第一卷绕部和第二卷绕部，该第一卷绕部用于卷绕第一极片201的第一部分201a以形成第一电极组件，该第二卷绕部用于卷绕第一极片201的第二部分201b以形成第二电极组件。
具体地，在本申请实施例中，第一放卷装置211中可设置有能够转动的转轴，该转轴上设置有层层卷绕的第一极片201。当该转轴在驱动力的作用下转动时，转轴上卷绕的第一极片201呈平展态输出，该第一放卷装置211完成放料动作。
可以理解的是，为了接收并传送该第一放卷装置211输出的第一极片201，该第一放卷装置211的下游可设置有传送装置，例如，如图2中所示的多个辊结构，或者传送带等等。该传送装置可贯穿卷绕设备20中多个加工装置，以实现第一极片201在卷绕设备20中的流动传送。
具体地，第一极片201由第一放卷装置211输出后，其在卷绕设备20中的形态 为条带状。例如，如图1所示，该第一极片201为附接于多个辊的折线形条带。该第一极片201的长度方向即为该条带状的第一极片201的长度方向。当该条带状的第一极片201在卷绕设备20中传动时，该第一极片201的长度方向也可为第一极片201的传动方向。
第一分切装置220设置于第一放卷装置211的下游，其用于接收来自于第一放卷装置211输出的第一极片201，并将该第一极片201沿其长度方向切割成第一部分201a和第二部分201b。
作为示例而非限定，该第一分切装置220可以为激光模切装置，该激光模切装置固定设置于卷绕设备20中。当第一极片201通过传送装置在卷绕设备20中传动时，该激光模切装置能够沿第一极片201的传动方向将该第一极片201切割为第一部分201a和第二部分201b。
卷绕装置230设置于第一分切装置220的下游。当第一分切装置220对第一极片201切割为第一部分201a和第二部分201b后，该第一部分201a和第二部分201b可同时被传送装置传动，并到达卷绕装置230。
具体地，该卷绕装置230具有能够同时卷绕运动的第一卷绕部和第二卷绕部，该第一卷绕部和第二卷绕部用于分别接收第一极片201的第一部分201a和第二部分201b。且该第一卷绕部和第二卷绕部可同时对该第一极片201的第一部分201a和第二部分201b进行卷绕以分别形成第一电极组件和第二电极组件。
可以理解的是，在本申请实施例中，第一极片201的第一部分201a和第二部分201b可以分别用于形成两个电极组件。该第一极片201的第一部分201a和第二部分201b可以分别作为该两个电极组件中的正极片，或者该第一极片201的第一部分201a和第二部分201b可以分别作为该两个电极组件中的负极片。
作为示例而非限定，该卷绕装置230可以为卷针，该卷针在长度方向上具有两个卷绕部，以方便对该第一极片201的第一部分201a和第二部分进行卷绕。
通过本申请实施例的技术方案，卷绕设备20包括第一分切装置220，该第一分切装置220能够将第一放卷装置211输出的第一极片201切割为两部分，然后，该两部分能够分别被卷绕装置230中的两个卷绕部同时卷绕形成两个电极组件。因此，在该卷绕设备20中，仅需提供一个第一放卷装置211，配合于第一分切装置220以及卷绕装置230，即能实现同时制造得到两个电极组件。该卷绕设备20对电极组件的制造效率较高，且不会占用较大的厂房空间，有利于提升卷绕设备20使用用地和产能的比值，提高了厂房能够实现的最大产能。
图3示出了本申请一实施例提供的第一极片201在切割前后的示意图。其中，图3中的(a)图示出了第一极片201在切割前的示意图，图3中的(b)图示出了第一极片201在切割后的示意图。
如图3中的(a)图所示，第一极片201包括第一基片2011以及涂覆于该第一基片2011的表面的两个第一活性涂层区2012，该两个第一活性涂层区2012分别位于第一极片201在宽度方向上的两侧，且该两个第一活性涂层区2012之间具有沿第一极片201的长度方向延伸的第一极耳区2013。
在该情况下，上述第一分切装置220用于沿第一极片201的长度方向在第一极耳区2013中切割，以将第一极片201切割为如图3中的(b)图所示的第一部分201a和第二部分201b。
可选地，在一些实施方式中，第一基片2011上涂覆的第一活性涂层区2012可以为负极活性物质层。作为示例，该第一基片2011可以为铜基片，该第一活性涂层区2012中包括碳或者硅。
可选地，在另一些实施方式中，第一基片2011上涂覆的第一活性涂层区2012可以为正极活性物质层。作为示例，第一基片2011可以为铝基片，该第一活性涂层区2012中包括钴酸锂、磷酸铁锂、三元锂或锰酸锂等。
具体地，在本申请实施例的第一极片201中，第一基片2011上涂覆有两个第一活性涂层区2012，且该两个第一活性涂层区2012被位于该二者之间的第一极耳区2013隔离开，该第一极耳区2013为第一基片2011上未被涂覆有第一活性涂层区2012的区域。该两个第一活性涂层区2012和第一极耳区2013均为条带状区域，且沿第一极片201的长度方向延伸。可选地，该两个第一活性涂层区2012和第一极耳区2013的长度尺寸可以与第一极片201的长度尺寸相近或相同。
可选地，如图3中的(a)图所示，在第一极片201的宽度方向上，两个第一活性涂层区2012的尺寸相同，且该两个第一活性涂层区2012覆盖至第一极片201在宽度方向上的两侧边缘。另外，第一极耳区2013可以位于第一极片201在宽度方向上的中心。该第一极耳区2013的宽度可以根据实际所需的电极组件的极耳的尺寸进行设计，本申请实施例对此不做具体限定。
可选地，在第一极耳区2013位于第一极片201在宽度方向上的中心的情况下，第一分切装置220可以进一步沿第一极耳区2013在长度方向上的中心线进行切割，以形成相同尺寸的第一部分201a和第二部分201b。如图3中的(b)图所示，该相同尺寸的第一部分201a和第二部分201b具有相同尺寸的第一活性涂层区2012以及相同尺寸的极耳。该相同尺寸的第一部分201a和第二部分201b能够用于卷绕形成相同尺寸的电极组件。
当然，在其它替代实施例中，第一极耳区2013也可以偏离于第一极片201在宽度方向上的中心，在该情况下，第一分切装置220可以将第一极片201切割成不同尺寸的第一部分201a和第二部分201b，以用于卷绕形成尺寸不同的电极组件。
通过本申请实施例的技术方案，第一极片201包括两个第一活性涂层区2012以及位于该两个第一活性涂层区2012之间的第一极耳区2013。对于该第一极片201，其不同于一般用于制造单个电极组件的单个极片，该第一极片201中包括用于制造两个电极组件的两个极片(即切割之后的第一部分201a和第二部分201b)。对于该第一极片201，可以通过同一道涂覆工艺制造得到，相比于通过两道涂覆工艺分别制造两个单极片的技术方案，该第一极片201的生产效率更高。
另外，第一极耳区2013位于两个第一活性涂层区2012之间，第一分切装置220在第一极耳区2013中进行切割，分离得到的第一部分201a和第二部分201b的同时，还能切割得到第一部分201a和第二部分201b的极耳，满足电极组件的极耳的加工要 求。
可选地，在上述申请实施例中，第一分切装置220可以仅包括一个分切部，其用于在第一极耳区2013中形成一条切割线，以将第一极片201切割为两个部分。可选地，该一条切割线可以为直线，以形成上述图3中所示第一部分201a和第二部分201b中的矩形极耳，或者，该一条切割线也可以为波浪线、折线等其它线形，以形成其它形状的极耳。在该实施方式下，第一分切装置220的整体成本较低，且其切割方式实现简单、切割效率以及质量较高。
或者，在其它实施例中，第一分切装置200还可以包括多个分切部，其用于在第一极耳区2013中形成多条切割线，以将第一极片201切割为多个部分。
图4示出了本申请一实施例提供的第一分切装置220对第一极片201的切割示意图。
如图4所示，该第一分切装置220包括：第一分切部221和第二分切部222。其中，第一分切部221用于在上述第一极耳区2013中切割，以形成第一极片201的第一部分201a的至少一个极耳，第二分切部222用于在第一极耳区2013中切割，以形成第一极片201的第二部分201b的至少一个极耳。
作为一种示例，如图4所示，该第一分切部221和第二分切部222可以为并排设置的两个激光器。其中，第一分切部221发射的激光在第一极耳区2013中形成第一切割线2211，第二分切部222发射的激光在第一极耳区2013中形成第二切割线2221，该第一切割线2211和第二切割线2221互不交叉，且均沿第一极耳区2013的长度方向(即第一极片201的长度方向)延伸。
其中，第一切割线2211用于形成第一极片201的第一部分201a的极耳。第二切割线2221用于形成第一极片201的第二部分201b的极耳。可选地，该第一切割线2211和第二切割线2221可以为预设任意形状，例如，其可以是折线形，波浪线形等等。可选地，该第一切割线2211和第二切割线2221的形状可以相同或者不同。本申请实施例对该第一切割线2211和第二切割线2221的具体设计不做限定。
在第一切割线2211和第二切割线2221的形状为波浪线形或折线形的情况下，对应于该第一切割线2211和第二切割线2221，第一极片201的第一部分201a和第二部分201b的极耳可以包括多个梯形或者多个半圆形的小极耳。
通过本申请实施例的技术方案，在第一分切装置220中设置第一分切部221和第二分切部222，能够使得该两个分切部分别对第一极片201中的第一极耳区2013进行切割，以分别形成第一部分201a的极耳以及第二部分201b的极耳。通过该技术方案，第一分切部221和第二分切部222能够针对具体需求制造得到尺寸更小且精度更高的第一极片201的第一部分201a的极耳和第一极片201的第二部分201b的极耳，不仅有利于电极组件后续制造工艺的进行，例如，对卷绕后的电极组件中极耳的处理等等，还能提高电极组件的整体性能。
图5示出了本申请一实施例提供的卷绕设备20的另一示意性结构图。
如图5所示，在本申请实施例中，卷绕设备20还包括：第一调整组件241和/或第二调整组件242，设置于第一分切装置220与卷绕装置230之间。其中，第一调整 组件241用于对第一极片201的第一部分201a在卷绕设备20中的传动参数进行调整，和/或，第二调整组件242用于对第一极片201的第二部分201b在卷绕设备20中的传动参数进行调整。
具体地，在第一分切装置220将第一极片201切割为第一部分201a和第二部分201b之后，该第一部分201a和第二部分201b分别经过两条不同的料线传动至下游。为了保障下游中卷绕装置230对该两部分的卷绕效果，在该卷绕装置230与第一分切装置220之间，卷绕设备20中还设置有第一调整组件241对第一极片201的第一部分201a进行调整，和/或，第二调整组件242对第一极片201的第二部分201b进行调整。
具体地，第一调整组件241用于对第一极片201的第一部分201a在卷绕设备20中的传动参数进行调整，该传动参数包括但不限是：第一部分201a在卷绕设备20中的张力、速度、方向、位置等等。类似地，第二调整组件242用于对第一极片201的第二部分201b在卷绕设备20中的传动参数进行调整，该传动参数包括但不限是：第二部分201b在卷绕设备20中的张力、速度、方向、位置等等。
在本申请实施例的技术方案中，通过该第一调整组件241和/或第二调整组件242对第一极片201的第一部分201a和/或第二部分201b的传动参数的调整，可以使得该第一部分201a和/或第二部分201b在卷绕设备20中的传动更为稳定，且提升后续该第一部分201a和/或第二部分201b在卷绕装置230中的卷绕效果，从而提升制备得到的两个电极组件的整体性能。
作为示例而非限定，如图5所示，卷绕设备20可以同时包括第一调整组件241和第二调整组件242。该第一调整组件241和第二调整组件242均可以包括：纠偏组件2401。该第一调整组件241中的纠偏组件2401用于调整第一极片201的第一部分201a在该卷绕设备20中的相对位置。该第二调整组件242中的纠偏组件2401用于调整第一极片201的第二部分201b在该卷绕设备20中的相对位置。
通过在第一调整组件241和第二调整组件242中分别设置纠偏组件2401，可以使得该两个纠偏组件2401能够更有针对性的分别对第一极片201的第一部分201a和第二部分201b在卷绕设备20中的相对位置进行调整，且调整结果更为精准，有利于提高该第一极片201的第一部分201a和第二部分201b在卷绕装置230中的卷绕效果。
另外，如图5所示，该第一调整组件241和第二调整组件242也可以包括：张力调节组件2402。该第一调整组件241中的张力调节组件2402用于检测并调整第一极片201的第一部分201a的张力。该第二调整组件242中的纠偏组件2401用于检测并调整第一极片201的第二部分201b的张力。
通过在第一调整组件241和第二调整组件242中分别设置张力调节组件2402，可以使得该张力调节组件2402能够更有针对性的分别对第一极片201的第一部分201a的张力和第二部分201b的张力进行检测和调整，且调整结果更为精准，有利于提高该第一极片201的第一部分201a和第二部分201b在卷绕设备20中的传动稳定性以及可靠性，且能够进一步保证该第一部分201a和第二部分201b在卷绕装置230中的卷绕效果。
可选地，如图5所示，卷绕设备20还包括：第一入料装置251，设置于卷绕装 置230的上游，用于将第一极片201的第一部分201a和第二部分201b传送至卷绕装置230。
图6示出了本申请一实施例提供的第一入料装置251的结构示意图。
如图6所示，第一入料装置251包括：第一入料部2511和第二入料部2512，设置于卷绕装置230的上游。其中，第一入料部2511用于将第一极片201的第一部分201a传送至卷绕装置230的第一卷绕部，第二入料部2512用于将第一极片201的第二部分201b传送至卷绕装置230的第二卷绕部。
具体地，在本申请实施例中，通过两个入料部分别对第一极片201的两部分进行处理，能够使得该第一极片201的两部分能够更为稳定且可靠的分别进入卷绕装置中的两个卷绕部，提升第一极片201的两部分的卷绕效果从而提升制造得到的两个电极组件的性能。
可选地，如图6所示，第一入料部2511可包括：第一动辊2501、第一驱动件2502和第一传动件2503。类似地，第二入料部2512可包括：第二动辊2505、第二驱动件2506和第二传动件(图中未示出)。
其中，第一驱动件2502用于驱动第一动辊2501将第一极片201的第一部分201a压附于第一传动件2503，该第一传动件2503用于将第一极片201的第一部分201a传送至卷绕装置230的第一卷绕部。类似地，第二驱动件2506用于驱动第二动辊2505将第一极片201的第二部分201b压附于第二传动件，该第二传动件用于将第一极片201的第二部分201b传送至卷绕装置230的第二卷绕部。
具体地，在如图6所示实施方式中，在第一入料部2511中，第一传动件2503也可为辊结构。相对于第一动辊2501，该第一传动件2503为定辊，但该定辊能够主动转动，从而带动位于该定辊上的第一极片201的第一部分201a。
在第一入料部2511中，第一传动件2503和第一动辊2501分别位于第一极片201的第一部分201a的两侧。其中，第一动辊2501能够在第一驱动件2502的驱动作用下沿垂直于第一极片201的方向运动。当需要对卷绕装置230进行入料时，第一动辊2501朝向第一极片201的第一部分201a运动，并将该第一部分201a压附于第一传动件2503，提升第一传动件2503对第一部分201a的传动效果且提升第一部分201a的传输稳定性。
类似地，第二入料部2512中第二动辊2505、第二驱动件2506以及第二传动件的相关技术方案可以参见上文第一入料部2511中的第一动辊2501、第一驱动件2502以及第一传动件2503的相关描述，此处不做过多赘述。
可选地，在一些实施方式中，第一入料部2511中的第一传动件2503和第二入料部2512中的第二传动件可以为相互分立的两个部件。或者，在另一些实施方式中，该第一传动件2503和第二传动件也可以为一体式部件。例如，在该实施方式中，第一传动件2503和第二传动件为同一定辊，该定辊同时对应于第一极片201的第一部分201a和第二部分201b，并对该第一部分201a和第二部分201b进行传动。
另外，如图6所示，在第一入料装置251中，除了包括第一入料部2511和第二入料部2512以外，还可以包括：夹持部2513，用于夹持第一极片201的第一部分201a 和第二部分201b，使得该两个部分能够较为平稳且稳定的进入到后续两个入料部中。
作为示例，在图6所示实施方式中，夹持部2513可以为两个夹持辊，该两个夹持辊分别设置于第一极片201的第一部分201a和第二部分201b的两侧，既可以对该两个部分起到良好的夹持作用，也不会对该两个部分的传动造成较大阻力。
在该实施方式的技术方案中，第一入料部2511和第二入料部2512由动辊、驱动件以及传动件等部件组成，整体结构便于实现且可靠性较高，能够将第一极片201的两个部分平稳有效的传送至卷绕装置230中。
可以理解的是，图6仅作为示意，示出了第一入料装置251中的部分部件，除了图6中所示部件以外，该第一入料装置251还可以包括相关技术中的其它功能部件，例如切刀等切割件等等。
图7示出了本申请一实施例提供的卷绕设备20的另一示意性结构图。
如图7所示，卷绕设备20还可包括：第二放卷装置212，用于输出第二极片202；第二分切装置260，设置于第二放卷装置212的下游，用于沿第二极片202的长度方向将第二极片202切割为第一部分202a和第二部分202b。
上述卷绕装置230，设置于第二分切装置260的下游，其中的第一卷绕部用于卷绕上述第一极片201的第一部分201a以及该第二极片202的第一部分202a以形成第一电极组件，第二卷绕部用于卷绕上述第一极片201的第二部分201b以及第二极片202的第二部分202b以形成第二电极组件。
具体地，在本申请实施例中，第二放卷装置212中可设置有能够转动的转轴，该转轴上设置有层层卷绕的第二极片202。当该转轴在驱动力的作用下转动时，转轴上卷绕的第二极片202呈平展态输出，该第二放卷装置212完成放料动作。
可以理解的是，为了接收并传送该第二放卷装置212输出的第二极片202，该第二放卷装置212的下游可设置有传送装置，例如，一个或多个辊结构、传送带等等。该传送装置可贯穿卷绕设备20中多个加工装置，以实现第二极片202在卷绕设备20中的流动传送。
第二极片202由第二放卷装置212输出后，其在卷绕设备20中的形态为条带状。例如，如图7所示，该第二极片202为附接于多个辊的折线形条带。该第二极片202的长度方向即为该条带状的第二极片202的长度方向。当该条带状的第二极片202在卷绕设备20中传动时，该第二极片202的长度方向也可为第二极片202的传动方向。
第二分切装置260设置于第二放卷装置212的下游，其用于接收来自于第二放卷装置212输出的第二极片202，并将该第二极片202沿其长度方向切割为第一部分202a和第二部分202b。
作为示例而非限定，该第二分切装置260可以为切刀，该切刀固定设置于卷绕设备20中。当第二极片202通过传送装置在卷绕设备20中传动时，该切刀能够沿第二极片202的传动方向将该第二极片202切割为第一部分202a和第二部分202b。
卷绕装置230设置于第一分切装置220和第二分切装置260的下游。当第一分切装置220对第一极片201切割为第一部分201a和第二部分201b，且当第二分切装置260对第二极片202切割为第一部分202a和第二部分202b后，该第一极片201的两个 部分以及第二极片202的两个部分可同时被传送装置传动，并到达卷绕装置230。
该卷绕装置230中的第一卷绕部用于接收第一极片201的第一部分201a以及第二极片202的第一部分202a，并对二者进行层叠卷绕，以形成第一电极组件。类似地，该卷绕装置230中的第二卷绕部用于接收第一极片201的第二部分201b以及第二极片202的第二部分202b，并对二者进行层叠卷绕，以形成第二电极组件。
可以理解的是，在本申请实施例中，若第一极片201的第一部分201a和第二部分201b为两个电极组件中的正极片，则第二极片201的第一部分202a和第二部分202b为该两个电极组件中的负极片。或者若第一极片201的第一部分201a和第二部分201b为两个电极组件中的负极片，则第二极片201的第一部分202a和第二部分202b为该两个电极组件中的正极片。
通过本申请实施例的技术方案，卷绕设备20同时包括第一分切装置220和第二分切装置260，该第一分切装置220能够将第一放卷装置211输出的第一极片201切割为两部分，该第二分切装置260能够将第二放卷装置212输出的第二极片202切割为两部分。然后，该第一极片201两部分以及第二极片202的两部分能够分别被卷绕装置230中的两个卷绕部同时卷绕形成两个电极组件。因此，在该卷绕设备20中，仅需提供一个第一放卷装置211和一个第二放卷装置212，配合于第一分切装置220、第二分切装置260以及卷绕装置230，即能实现同时制造得到两个电极组件。该卷绕设备20对电极组件的制造效率较高，且能够进一步降低所需占用的厂房空间，有利于进一步提升卷绕设备20使用用地和产能的比值，以提高厂房能够实现的最大产能。
图8示出了本申请一实施例提供的第二极片202在切割前后的示意图。其中，图8中的(a)图示出了第二极片201在切割前的示意图，图8中的(b)图示出了第二极片202在切割后的示意图。
如图8所示，第二极片202包括第二基片2021以及涂覆于该第二基片2021的表面的第二活性涂层区2022，该第二活性涂层区2022在第二极片202的宽度方向上的两侧分别具有沿第二极片202的长度方向延伸的第二极耳区2023。
在该情况下，上述第二分切装置260用于沿第二极片202的长度方向在第二活性涂层区2022中切割，以将第二极片202切割为第一部分202a和第二部分202b。
可选地，在一些实施方式中，第二基片2021上涂覆的第二活性涂层区2022可以为正极活性物质层。作为示例，第二基片2021可以为铝基片，该第二活性涂层区2022中包括钴酸锂、磷酸铁锂、三元锂或锰酸锂等。
可选地，在另一些实施方式中，第二基片2021上涂覆的第二活性涂层区2022可以为负极活性物质层。作为示例，该第二基片2021可以为铜基片，该第二活性涂层区2022中包括碳或者硅。
具体地，在本申请实施例的第二极片202中，第二基片2021上涂覆有一个第二活性涂层区2022，该第二活性涂层区2022在宽度方向上的两侧具有两个第二极耳区2023，该第二极耳区2023为第二基片2021上未被涂覆有第二活性涂层区2022的区域。该第二活性涂层区2022和两个第二极耳区2023均为条带状区域，且沿第二极片202的长度方向延伸。可选地，该第二活性涂层区2022和两个第二极耳区2023的长度尺寸可 以与第一极片201的长度尺寸相近或相同。
可选地，如图8中的(a)图所示，在第二极片202的宽度方向上，两个第二极耳区2023的尺寸相同，且该两个第二极耳区2023覆盖至第二极片202在宽度方向上的两侧边缘。该第二极耳区2023的宽度可以根据实际所需的电极组件的极耳的尺寸进行设计，本申请实施例对此不做具体限定。
可选地，在本申请实施例中，第二分切装置260可以沿第二活性涂层区2022在长度方向上的中心线进行切割，以形成相同尺寸的第一部分202a和第二部分202b。如图8中的(b)图所示，该相同尺寸的第一部分202a和第二部分202b具有相同尺寸的第二活性涂层区2022以及相同尺寸的极耳。该相同尺寸的第一部分202a和第二部分202b能够用于卷绕形成相同尺寸的电极组件。
当然，在其它替代实施例中，第二分切装置260可以将第二极片202切割成不同尺寸的第一部分202a和第二部分202b，以用于卷绕形成尺寸不同的电极组件。
通过本申请实施例的技术方案，第二极片202包括第二活性涂层区2022以及位于该第二活性涂层区2022两侧的两个第二极耳区2023。对于该第二极片202，其不同于一般用于制造单个电极组件的单个极片，该第二极片202中包括用于制造两个电极组件的两个极片(即切割之后的第一部分202a和第二部分202b)。对于该第二极片202，可以通过同一道涂覆工艺制造得到，相比于通过两道涂覆工艺分别制造两个单极片的技术方案，该第二极片202的生产效率更高。
图9示出了本申请实施例提供的卷绕设备20的另一示意性结构图。
如图9所示，卷绕设备20还包括：第三调整组件243和/或第四调整组件244，设置于上述第二分切装置260与卷绕装置230之间。其中，第三调整组件243用于对第二极片202的第一部分202a在卷绕设备20中的传动参数进行调整，和/或，第四调整组件244用于对第二极片202的第二部分202b在卷绕设备20中的传动参数进行调整。
可选地，在一些实施方式中，第三调整组件243和第四调整组件244包括：纠偏组件2401；第三调整组件243中的纠偏组件2401用于调整第二极片202的第一部分202a在卷绕设备20中的相对位置；第四调整组件244中的纠偏组件2401用于调整第二极片202的第二部分202b在卷绕设备20中的相对位置；和/或，第三调整组件243和第四调整组件244包括：张力调节组件2402；第三调整组件243中的张力调节组件2402用于检测并调整第二极片202的第一部分202a的张力；第四调整组件244中的张力调节组件2402用于检测并调整第二极片202的第二部分202b的张力。
具体地，在该实施方式中，第三调整组件243和第四调整组件244的相关技术方案可以参见上文实施例中第一调整组件241和第二调整组件242的相关描述，此处不做过多赘述。
在本申请实施例的技术方案中，通过该第三调整组件243和/或第四调整组件244分别对第二极片202的第一部分202a和/或第二部分202b的传动参数的调整，可以使得该第一部分202a和/或第二部分202b在卷绕设备20中的传动更为稳定且提升后续该第一部分202a和/或第二部分202b在卷绕装置230中的卷绕效果，从而提升制备得到的两个电极组件的整体性能。
另外，如图9所示，该卷绕设备20还可包括：第二入料装置252，设置于卷绕装置230的上游，用于将第二极片202的第一部分202a和第二部分202b传送至卷绕装置230。
具体地，该第二入料装置252的相关技术方案可以参见上文实施例中第一入料装置251的相关描述，此处也不做过多赘述。
在上文图7至图9所示实施例中，卷绕设备20仅包括一个第二放卷装置212，且通过第二分切装置260将该第二放卷装置212输出的第二极片202切割为两部分。在另一些实施例中，卷绕设备20也可包括两个第二放卷装置212，该两个第二放卷装置212输出的第二极片202不需要经过切割。
图10示出了本申请一实施例提供的卷绕设备20的另一示意性结构图。
如图10所示，该卷绕设备20包括：两个第二放卷装置212，该两个第二放卷装置212中的每个第二放卷装置212用于输出第二极片202。
上述卷绕装置230，设置于两个第二放卷装置212的下游，其中的第一卷绕部用于卷绕第一极片201的第一部分201a以及来自一个第二放卷装置212的第二极片202以形成第一电极组件，第二卷绕部用于卷绕第一极片201的第二部分201b以及来自另一个第二放卷装置212的第二极片202以形成第二电极组件。
具体地，在本申请实施例中，两个第二放卷装置212上设置的两个第二极片202可以分别为上述图8所示实施例中的第一部分202a和第二部分202b。换言之，在本申请实施例中，该第二极片202即用于形成单个电极组件中的极片。
具体地，参见图8中的第一部分202a或第二部分202b，该第二极片202包括第二基片2021以及涂覆于该第二基片2021的表面的第二活性涂层区2022，该第二活性涂层区2022在第二极片202的宽度方向上的一侧具有沿第二极片202的长度方向延伸的第二极耳区2023。
通过该申请实施例的技术方案，卷绕设备20包括两个第二放卷装置212，且该两个第二放卷装置212上设置的第二极片202为单个电极组件中的极片，不需要经过切割。在该实施方式下，后续对该两个第二放卷装置212输出的两个第二极片202的位置不需要进行大幅度的调整，也能使得该两个第二极片202能够与第一极片201的两个部分相互配合卷绕，形成两个电极组件。因此，通过该技术方案，第二极片202在卷绕设备20中的传动更为稳定，通过该卷绕设备20制造得到的电极组件的性能以及良率能够得到提升。
可选地，在图10所示实施例中，第二放卷装置212的下游设置有调整组件。例如，两个第二放卷装置212的下游分别设置有上述第三调整组件243和第四调整组件244。该第三调整组件243和第四调整组件244用于对来自两个第二放卷装置212的两个第二极片202在卷绕设备20中的传动参数进行调整。
图11示出了本申请一实施例提供的另一卷绕设备20的示意性结构图。
如图11所示，在上述图7所示实施例的基础上，该卷绕设备20还包括：两个第三放卷装置213，该两个第三放卷装置213中的每个第三放卷装置213用于输出第一隔膜203；两个第四放卷装置214，该两个第四放卷装置214中的每个第四放卷装置214 用于输出第二隔膜204。
卷绕装置230，设置于该两个第三放卷装置213以及两个第四放卷装置214的下游，其中的第一卷绕部用于卷绕第一极片201的第一部分201a、来自一个第三放卷装置213的第一隔膜203以及来自一个第四放卷装置214的第二隔膜204以形成第一电极组件；第二卷绕部用于卷绕第一极片201的第二部分201b、来自另一个第三放卷装置213的第一隔膜203以及来自另一个第四放卷装置214的第二隔膜204以形成第二电极组件。
具体地，在本申请实施例中，第一隔膜203和第二隔膜204用于隔离正、负极片，并与该正、负极片共同卷绕，以形成电极组件。换言之，在本申请实施例，卷绕装置230中的每个卷绕部均可接收四个来料，即第一隔膜203，第二隔膜204，第一极片201的一部分以及第二极片202的一部分。
图12示出了本申请一实施例提供的一种卷绕装置230的示意性结构图。
如图12所示，该卷绕装置230中的第一卷绕部231和第二卷绕部232沿卷绕装置230的轴向排布。该卷绕装置230中的第一卷绕部231用于同时接收一个第一隔膜203，第一极片201的第一部分201a，一个第二隔膜204，以及第二极片202的第一部分202a，并对该四个来料进行卷绕。与此同时，与该第一卷绕部231并排的第二卷绕部232用于同时接收另一个第一隔膜203，第一极片201的第二部分201b，另一个第二隔膜204，以及第二极片202的第二部分202b，并对该四个来料进行卷绕。
在本申请实施例的技术方案中，通过两个第三放卷装置213输出两个第一隔膜203，以及两个第四放卷装置214输出两个第二隔膜204，该两个第一隔膜203以及两个第二隔膜204能够同时传送至卷绕装置230中的两个卷绕部，以与第一极片的两个部分同时卷绕，形成性能稳定且能够可靠使用的两个电极组件，且电极组件的制造效率较高。
可选地，如图11所示，在本申请实施例中，卷绕设备20还包括：第一合并装置271，设置于上述两个第三放卷装置213以及卷绕装置230之间，该第一合并装置271包括设置于同一辊上的两个第一转动部(图中未示出)，该两个第一转动部一一对应于两个第三放卷装置213以及卷绕装置230中的两个卷绕部，每个第一转动部用于将来自对应的第三放卷装置213的第一隔膜203传送至对应的卷绕部；和/或，
第二合并装置272，设置于上述两个第四放卷装置214以及卷绕装置230之间，该第二合并装置272包括设置于同一辊上的两个第二转动部(图中未示出)，该两个第二转动部一一对应于两个第四放卷装置214以及卷绕装置230中的两个卷绕部，每个第二转动部用于将来自对应的第四放卷装置214的第二隔膜204传送至对应的卷绕部。
图13示出了本申请一实施例提供的第一合并装置271的示意性结构图。
如图13所示，该第一合并装置271包括：固定部2712，过辊2713，以及设置于该过辊2713上的两个相互分离的第一转动部2711。其中，过辊2713在轴向上的一端固定于固定部2712，该两个第一转动部2711为过辊2713上的两个分离轴承位，用于分别接收分离的两个第一隔膜203。
具体地，该两个第一转动部2711一一对应于两个第三放卷装置213，且该两个 第一转动部2711一一对应于卷绕装置230中的两个卷绕部，即第一卷绕部231和第二卷绕部232。一个第一转动部2711与其对应的第三放卷装置213和卷绕部形成一组卷绕组件，用于实现将一个第一隔膜203卷绕至一个卷绕部。
可以理解的是，第二合并装置272的具体结构可以与上述第一合并装置271相同，具体相关技术方案可以参见上文描述，此处不做赘述。
通过本申请实施例的技术方案，两个第一隔膜203可以通过同一个第一合并装置271传送至卷绕装置230中的两个卷绕部，类似地，两个第二隔膜204也可以通过同一个第二合并装置272传送至卷绕装置230中的两个卷绕部。在该实施方式中，不需要通过多个装置分别将两个第一隔膜203传送至卷绕装置230，也不需要多个装置分别将两个第二隔膜204传送至卷绕装置230，从而可以减少卷绕设备20中装置的数量，进一步降低卷绕设备20所需占用的厂房空间。
图14示出了本申请一实施例提供的卷绕设备20的另一示意性结构图。
如图14所示，在上述图11所示实施例的基础上，该卷绕设备20还包括：
两个第五调整组件245，一一对应于两个第三放卷装置213，且设置于第一合并装置271与两个第三放卷装置213之间，第五调整组件245用于对第一隔膜203在卷绕设备20中的传动参数进行调整；和/或，
两个第六调整组件246，一一对应于两个第四放卷装置214，且设置于第二合并装置272与两个第四放卷装置214之间，第六调整组件246用于对第二隔膜204在卷绕设备20中的传动参数进行调整。
可选地，在一些实施方式中，第五调整组件245和第六调整组件246包括：张力调节组件2402；第五调整组件245中的张力调节组件2402用于检测并调整第一隔膜203的张力；第六调整组件246中的张力调节组件2402用于检测并调整第二隔膜204的张力。
具体地，在该实施方式中，第五调整组件245和第六调整组件246的相关技术方案可以参见上文实施例中第一调整组件241和第二调整组件242的相关描述，此处不做过多赘述。
在本申请实施例的技术方案中，通过该第五调整组件245和/或第六调整组件246对第一隔膜203和/或第二隔膜204的传动参数的调整，可以使得该第一隔膜203和/或第二隔膜204在卷绕设备20中的传动更为稳定且提升后续该第一隔膜203和/或第二隔膜204在卷绕装置230中的卷绕效果，从而提升制备得到的两个电极组件的整体性能。
可以理解的是，在上文图11至图14所示实施例中，卷绕设备20包括：如图7或图9所示的一个第二放卷装置212以及第二分切装置260，作为替代的实施方式，该卷绕设备20也可以包括如图10所示的两个第二放卷装置212，在该实施方式下，该卷绕设备20中的其它装置部件的相关技术方案可以参见上文描述，此处不做过多赘述。
还可以理解的是，在上述申请实施例中，以第一分切装置220将第一极片201切割为两部分作为举例说明，第一分切装置220还可以将第一极片201切割为三个或三个以上的部分，卷绕装置230能够对三个或三个以上的部分第一极片同时进行卷绕，以 同时制造得到三个或三个以上的电极组件。具体地，该实施方式的具体方案可以根据上述申请实施例的技术方案得到，本文不再做具体赘述。
上文描述了本申请实施例的卷绕设备20。下面将描述本申请实施例的卷绕方法30，其中未详细描述的部分可参见前述各实施例。
图15示出了本申请一实施例提供的一种卷绕方法30的示意性流程框图。
如图15所示，该卷绕方法30包括如下步骤。
S310：输出第一极片201。
S320：沿第一极片201的长度方向将该第一极片201切割为第一部分201a和第二部分201b。
S330：对第一极片201的第一部分201a进行卷绕以形成第一电极组件，同时对第一极片201的第二部分201b进行卷绕以形成第二电极组件。
在一些可能的实施方式中，第一极片201包括第一基片2011以及涂覆于该第一基片2011的表面的两个第一活性涂层区2012，该两个第一活性涂层区2012分别位于第一极片201在宽度方向上的两侧，且该两个第一活性涂层区2012之间具有沿第一极片201的长度方向延伸的第一极耳区2013。
在该情况下，上述步骤S320可以包括：沿第一极片201的长度方向在第一极耳区2013中切割，以将该第一极片201切割为第一部分201a和第二部分201b。
在一些可能的实施方式中，上述“沿第一极片201的长度方向在第一极耳区2013中切割，以将该第一极片201切割为第一部分201a和第二部分201b”可以包括：沿朝向第一极片201的长度方向延伸的第一切割线2211在第一极耳区2013中切割，以得到第一极片201的第一部分201a并形成该第一极片201的第一部分201a的至少一个极耳；沿朝向第一极片201的长度方向延伸的第二切割线2221在第一极耳区2013中切割，以得到第一极片201的第二部分201b并形成该第一极片201的第二部分201b的至少一个极耳。
图16示出了本申请一实施例提供的卷绕方法30的另一示意性流程框图。
如图16所示，可选地，该卷绕方法30除了包括上述步骤S310与步骤S320以外，还可以包括以下步骤。
S340：输出第二极片202。
S350：沿该第二极片202的长度方向将第二极片202切割为第一部分202a和第二部分202b。
可选地，上述步骤S330可以包括如下步骤S331。
S331：对第一极片201的第一部分201a以及第二极片202的第一部分202a进行卷绕以形成第一电极组件，同时对第一极片201的第二部分201b以及第二极片202的第二部分202b进行卷绕以形成第二电极组件。
在一些可能的实施方式中，第二极片202包括第二基片2021以及涂覆于该第二基片2021的表面的第二活性涂层区2022，该第二活性涂层区2022在第二极片202的宽度方向上的两侧分别具有沿第二极片202的长度方向延伸的第二极耳区2023。
在该情况下，上述步骤S350可以包括：沿第二极片202的长度方向在第二活性 涂层区2022中切割，以将第二极片202切割为第一部分202a和第二部分202b。
图17示出了本申请一实施例提供的卷绕方法30的另一示意性流程框图。
如图17所示，可选地，该卷绕方法30除了包括上述步骤S310与步骤S320以外，还可以包括以下步骤。
S360：输出两个第二极片202；
可选地，上述步骤S330可以包括如下步骤S332。
S332：对第一极片201的第一部分201a以及两个第二极片202中的一个第二极片202进行卷绕以形成第一电极组件，同时对第一极片201的第二部分201b以及两个第二极片202中的另一个第二极片202进行卷绕以形成第二电极组件。
在一些可能的实施方式中，该第二极片202包括第二基片2021以及涂覆于该第二基片2021的表面的第二活性涂层区2022，该第二活性涂层区2022在第二极片202的宽度方向上的一侧具有沿第二极片202的长度方向延伸的第二极耳区2023。
虽然已经参考优选实施例对本申请进行了描述，但在不脱离本申请的范围的情况下，可以对其进行各种改进并且可以用等效物替换其中的部件。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (24)

  1. 一种卷绕设备(20)，包括：
    第一放卷装置(211)，用于输出第一极片(201)；
    第一分切装置(220)，设置于所述第一放卷装置(211)的下游，用于沿所述第一极片(201)的长度方向将所述第一极片(201)切割为第一部分(201a)和第二部分(201b)；
    卷绕装置(230)，设置于所述第一分切装置(220)的下游，且具有能够同时卷绕运动的第一卷绕部和第二卷绕部，所述第一卷绕部用于卷绕所述第一极片(201)的第一部分(201a)以形成第一电极组件，所述第二卷绕部用于卷绕第一极片(201)的第二部分(201b)以形成第二电极组件。
  2. 根据权利要求1所述的卷绕设备(20)，其中，所述第一极片(201)包括第一基片(2011)以及涂覆于所述第一基片(2011)的表面的两个第一活性涂层区(2012)，两个所述第一活性涂层区(2012)分别位于所述第一极片(201)在宽度方向上的两侧，两个所述第一活性涂层区(2012)之间具有沿所述第一极片(201)的长度方向延伸的第一极耳区(2013)；
    所述第一分切装置(220)用于沿所述第一极片(201)的长度方向在所述第一极耳区(2013)中切割，以将所述第一极片(201)切割为第一部分(201a)和第二部分(201b)。
  3. 根据权利要求2所述的卷绕设备(20)，其中，所述第一分切装置(220)包括：第一分切部(221)和第二分切部(222)；
    其中，所述第一分切部(221)用于在所述第一极耳区(2013)中切割，以形成所述第一极片(201)的第一部分(201a)的至少一个极耳，所述第二分切部(222)用于在所述第一极耳区(2013)中切割，以形成所述第一极片(201)的第二部分(201b)的至少一个极耳。
  4. 根据权利要求1至3中任一项所述的卷绕设备(20)，其中，所述卷绕设备(20)还包括：第一调整组件(241)和/或第二调整组件(242)，设置于所述第一分切装置(220)与所述卷绕装置(230)之间；
    其中，所述第一调整组件(241)用于对所述第一极片(201)的第一部分(201a)在所述卷绕设备(20)中的传动参数进行调整，和/或，所述第二调整组件(242)用于对所述第一极片(201)的第二部分(201b)在所述卷绕设备(20)中的传动参数进行调整。
  5. 根据权利要求4所述的卷绕设备(20)，其中，所述第一调整组件(241)和所述第二调整组件(242)包括：纠偏组件(2401)；所述第一调整组件(241)中的纠偏组件(2401)用于调整所述第一极片(201)的第一部分(201a)在所述卷绕设备(20)中的相对位置；所述第二调整组件(242)中的纠偏组件(2401)用于调整所述第一极片(201)的第二部分(201b)在所述卷绕设备(20)中的相对位置；和/或，
    所述第一调整组件(241)和所述第二调整组件(242)包括：张力调节组件(2402)；所述第一调整组件(241)中的张力调节组件(2402)用于检测并调整所述第一极片(201)的第一部分(201a)的张力；所述第二调整组件(242)中的张力调节组件(2402)用于检测并调整所述第一极片(201)的第二部分(201b)的张力。
  6. 根据权利要求1至5中任一项所述的卷绕设备(20)，其中，所述卷绕设备(20)还包括：第一入料部(251)和第二入料部(252)，设置于所述卷绕装置(230)的上游；
    其中，所述第一入料部(251)用于将所述第一极片(201)的第一部分(201a)传送至所述卷绕装置(230)的第一卷绕部，所述第二入料部(252)用于将所述第一极片(201)的第二部分(201b)传送至所述卷绕装置(230)的第二卷绕部。
  7. 根据权利要求6所述的卷绕设备(20)，其中，所述第一入料部(251)包括：第一动辊(2501)、第一驱动件(2502)和第一传动件(2503)，所述第二入料部(252)包括：第二动辊(2504)、第二驱动件(2505)和第二传动件(2506)；
    其中，所述第一驱动件(2502)用于驱动所述第一动辊(2501)将所述第一极片(201)的第一部分(201a)压附于所述第一传动件(2503)，所述第一传动件(2503)用于将所述第一极片(201)的第一部分(201a)传送至所述第一卷绕部；
    所述第二驱动件(2505)用于驱动所述第二动辊(2504)将所述第一极片(201)的第二部分(201b)压附于所述第二传动件(2506)，所述第二传动件(2506)用于将所述第一极片(201)的第二部分(201b)传送至所述第二卷绕部。
  8. 根据权利要求1至7中任一项所述的卷绕设备(20)，其中，所述卷绕设备(20)还包括：
    第二放卷装置(212)，用于输出第二极片(202)；
    第二分切装置(260)，设置于所述第二放卷装置(212)的下游，用于沿所述第二极片(202)的长度方向将所述第二极片(202)切割为第一部分(202a)和第二部分(202b)；
    所述卷绕装置(230)，设置于所述第二分切装置(260)的下游，所述第一卷绕部用于卷绕所述第一极片(201)的第一部分(201a)以及所述第二极片(202)的第一部分(202a)以形成所述第一电极组件，所述第二卷绕部用于卷绕所述第一极片(201)的第二部分(201b)以及所述第二极片(202)的第二部分(202b)以形成所述第二电极组件。
  9. 根据权利要求8所述的卷绕设备(20)，其中，所述第二极片(202)包括第二基片(2021)以及涂覆于所述第二基片(2021)的表面的第二活性涂层区(2022)，所述第二活性涂层区(2022)在所述第二极片(202)的宽度方向上的两侧分别具有沿所述第二极片(202)的长度方向延伸的第二极耳区(2023)；
    所述第二分切装置(260)用于沿所述第二极片(202)的长度方向在所述第二活性涂层区(2022)中切割，以将所述第二极片(202)切割为第一部分(202a)和第二部分(202b)。
  10. 根据权利要求8或9所述的卷绕设备(20)，其中，所述卷绕设备(20)还包 括：第三调整组件(243)和/或第四调整组件(244)，设置于所述第二分切装置(260)与所述卷绕装置(230)之间；
    其中，所述第三调整组件(243)用于对所述第二极片(202)的第一部分(202a)在所述卷绕设备(20)中的传动参数进行调整，和/或，所述第四调整组件(244)用于对所述第二极片(202)的第二部分(202b)在所述卷绕设备(20)中的传动参数进行调整。
  11. 根据权利要求10所述的卷绕设备(20)，其中，所述第三调整组件(243)和所述第四调整组件(244)包括：纠偏组件(2401)；所述第三调整组件(243)中的纠偏组件(2401)用于调整所述第二极片(202)的第一部分(202a)在所述卷绕设备(20)中的相对位置；所述第四调整组件(244)中的纠偏组件(2401)用于调整所述第二极片(202)的第二部分(202b)在所述卷绕设备(20)中的相对位置；和/或，
    所述第三调整组件(243)和所述第四调整组件(244)包括：张力调节组件(2402)；所述第三调整组件(243)中的张力调节组件(2402)用于检测并调整所述第二极片(202)的第一部分(202a)的张力；所述第四调整组件(244)中的张力调节组件(2402)用于检测并调整所述第二极片(202)的第二部分(202b)的张力。
  12. 根据权利要求1至7中任一项所述的卷绕设备(20)，其中，所述卷绕设备(20)还包括：
    两个第二放卷装置(212)，两个所述第二放卷装置(212)中的每个所述第二放卷装置(212)用于输出第二极片(202)；
    所述卷绕装置(230)，设置于两个所述第二放卷装置(212)的下游，所述第一卷绕部用于卷绕所述第一极片(201)的第一部分(201a)以及来自一个所述第二放卷装置(212)的所述第二极片(202)以形成所述第一电极组件，所述第二卷绕部用于卷绕所述第一极片(201)的第二部分(201b)以及来自另一个所述第二放卷装置(212)的所述第二极片(202)以形成所述第二电极组件。
  13. 根据权利要求12所述的卷绕设备(20)，其中，所述第二极片(202)包括第二基片(2021)以及涂覆于所述第二基片(2021)的表面的第二活性涂层区(2022)，所述第二活性涂层区(2022)在所述第二极片(202)的宽度方向上的一侧具有沿所述第二极片(202)的长度方向延伸的第二极耳区(2023)。
  14. 根据权利要求1至13中任一项所述的卷绕设备(20)，其中，所述卷绕设备(20)还包括：
    两个第三放卷装置(213)，两个所述第三放卷装置(213)中的每个所述第三放卷装置(213)用于输出第一隔膜(203)；
    两个第四放卷装置(214)，两个所述第四放卷装置(214)中的每个所述第四放卷装置(214)用于输出第二隔膜(204)；
    所述卷绕装置(230)，设置于两个所述第三放卷装置(213)以及两个所述第四放卷装置(214)的下游，所述第一卷绕部用于卷绕所述第一极片(201)的第一部分(201a)、来自一个所述第三放卷装置(213)的所述第一隔膜(203)以及来自一个所述第四放卷装置(214)的所述第二隔膜(204)以形成所述第一电极组件；
    所述第二卷绕部用于卷绕所述第一极片(201)的第二部分(201b)、来自另一个所述第三放卷装置(213)的所述第一隔膜(203)以及来自另一个所述第四放卷装置(214)的所述第二隔膜(204)以形成所述第二电极组件。
  15. 根据权利要求14所述的卷绕设备(20)，其中，所述卷绕设备(20)还包括：第一合并装置(271)，设置于两个所述第三放卷装置(213)以及所述卷绕装置(230)之间，所述第一合并装置(271)包括设置于同一辊上的两个第一转动部，两个所述第一转动部一一对应于两个所述第三放卷装置(213)以及所述卷绕装置(230)中的两个卷绕部，每个所述第一转动部用于将来自对应的所述第三放卷装置(213)的所述第一隔膜(203)传送至对应的卷绕部；和/或，
    第二合并装置(272)，设置于两个所述第四放卷装置(214)以及所述卷绕装置(230)之间，所述第二合并装置(272)包括设置于同一辊上的两个第二转动部，两个所述第二转动部一一对应于两个所述第四放卷装置(214)以及所述卷绕装置(230)中的两个卷绕部，每个所述第二转动部用于将来自对应的所述第四放卷装置(214)的所述第二隔膜(204)传送至对应的卷绕部。
  16. 根据权利要求15所述的卷绕设备(20)，其中，所述卷绕设备(20)还包括：两个第五调整组件(245)，一一对应于两个所述第三放卷装置(213)，且设置于所述第一合并装置(271)与两个所述第三放卷装置(213)之间，所述第五调整组件(245)用于对所述第一隔膜(203)在所述卷绕设备(20)中的传动参数进行调整；和/或，
    两个第六调整组件(246)，一一对应于两个所述第四放卷装置(214)，且设置于所述第二合并装置(272)与两个所述第四放卷装置(214)之间，所述第六调整组件(246)用于对所述第二隔膜(204)在所述卷绕设备(20)中的传动参数进行调整。
  17. 根据权利要求16所述的卷绕设备(20)，其中，所述第五调整组件(245)和所述第六调整组件(246)包括：张力调节组件(2402)；所述第五调整组件(245)中的张力调节组件(2402)用于检测并调整所述第一隔膜(203)的张力；所述第六调整组件(246)中的张力调节组件(2402)用于检测并调整所述第二隔膜(204)的张力。
  18. 一种卷绕方法(30)，包括：
    输出(S310)第一极片(201)；
    沿所述第一极片(201)的长度方向将所述第一极片(201)切割(S320)为第一部分(201a)和第二部分(201b)；
    对所述第一极片(201)的第一部分(201a)进行卷绕(S330)以形成第一电极组件，同时对第一极片(201)的第二部分(201b)进行卷绕以形成第二电极组件。
  19. 根据权利要求18所述的卷绕方法(30)，其中，所述第一极片(201)包括第一基片(2011)以及涂覆于所述第一基片(2011)的表面的两个第一活性涂层区(2012)，两个所述第一活性涂层区(2012)分别位于所述第一极片(201)在宽度方向上的两侧，两个所述第一活性涂层区(2012)之间具有沿所述第一极片(201)的长度方向延伸的第一极耳区(2013)；
    其中，所述沿所述第一极片(201)的长度方向将所述第一极片(201)切割(S320)为第一部分(201a)和第二部分(201b)，包括：
    沿所述第一极片(201)的长度方向在所述第一极耳区(2013)中切割，以将所述第一极片(201)切割为第一部分(201a)和第二部分(201b)。
  20. 根据权利要求19所述的卷绕方法(30)，其中，所述沿所述第一极片(201)的长度方向在所述第一极耳区(2013)中切割，以将所述第一极片(201)切割为第一部分(201a)和第二部分(201b)，包括：
    沿朝向所述第一极片(201)的长度方向延伸的第一切割线在所述第一极耳区(2013)中切割，以得到所述第一极片(201)的第一部分(201a)并形成所述第一极片(201)的第一部分(201a)的至少一个极耳；
    沿朝向所述第一极片(201)的长度方向延伸的第二切割线在所述第一极耳区(2013)中切割，以得到所述第一极片(201)的第二部分(201b)并形成所述第一极片(201)的第二部分(201b)的至少一个极耳。
  21. 根据权利要求18至20中任一项所述的卷绕方法(30)，其中，所述卷绕方法(30)还包括：
    输出(S340)第二极片(202)；
    沿所述第二极片(202)的长度方向将所述第二极片(202)切割(S350)为第一部分(202a)和第二部分(202b)；
    所述对所述第一极片(201)的第一部分(201a)进行卷绕(S330)以形成第一电极组件，同时对第一极片(201)的第二部分(201b)进行卷绕以形成第二电极组件，包括：
    对所述第一极片(201)的第一部分(201a)以及所述第二极片(202)的第一部分(202a)进行卷绕(S331)以形成所述第一电极组件，同时对所述第一极片(201)的第二部分(201b)以及所述第二极片(202)的第二部分(202b)进行卷绕以形成所述第二电极组件。
  22. 根据权利要求21所述的卷绕方法(30)，其中，所述第二极片(202)包括第二基片(2021)以及涂覆于所述第二基片(2021)的表面的第二活性涂层区(2022)，所述第二活性涂层区(2022)在所述第二极片(202)的宽度方向上的两侧分别具有沿所述第二极片(202)的长度方向延伸的第二极耳区(2023)；
    所述沿所述第二极片(202)的长度方向将所述第二极片(202)切割为第一部分(202a)和第二部分(202b)，包括：
    沿所述第二极片(202)的长度方向在所述第二活性涂层区(2022)中切割，以将所述第二极片(202)切割为第一部分(202a)和第二部分(202b)。
  23. 根据权利要求18至20中任一项所述的卷绕方法(30)，其中，所述卷绕方法(30)还包括：
    输出(S360)两个第二极片(202)；
    所述对所述第一极片(201)的第一部分(201a)进行卷绕(S330)以形成第一电极组件，同时对第一极片(201)的第二部分(201b)进行卷绕以形成第二电极组件， 包括：
    对所述第一极片(201)的第一部分(201a)以及两个所述第二极片(202)中的一个所述第二极片(202)进行卷绕(S332)以形成所述第一电极组件，同时对所述第一极片(201)的第二部分(201b)以及两个所述第二极片(202)中的另一个所述第二极片(202)进行卷绕以形成所述第二电极组件。
  24. 根据权利要求23所述的卷绕方法(30)，其中，所述第二极片(202)包括第二基片(2021)以及涂覆于所述第二基片(2021)的表面的第二活性涂层区(2022)，所述第二活性涂层区(2022)在所述第二极片(202)的宽度方向上的一侧具有沿所述第二极片(202)的长度方向延伸的第二极耳区(2023)。
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