WO2023173771A1 - 电池卷绕方法及装置 - Google Patents

电池卷绕方法及装置 Download PDF

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Publication number
WO2023173771A1
WO2023173771A1 PCT/CN2022/131412 CN2022131412W WO2023173771A1 WO 2023173771 A1 WO2023173771 A1 WO 2023173771A1 CN 2022131412 W CN2022131412 W CN 2022131412W WO 2023173771 A1 WO2023173771 A1 WO 2023173771A1
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WO
WIPO (PCT)
Prior art keywords
diaphragm group
winding
electrode piece
negative electrode
positive electrode
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Application number
PCT/CN2022/131412
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English (en)
French (fr)
Inventor
包瑞奇
黄海宁
Original Assignee
上海兰钧新能源科技有限公司
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Filing date
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Application filed by 上海兰钧新能源科技有限公司 filed Critical 上海兰钧新能源科技有限公司
Priority to EP22919285.1A priority Critical patent/EP4276962A1/en
Priority to US18/210,655 priority patent/US20240039030A1/en
Publication of WO2023173771A1 publication Critical patent/WO2023173771A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0404—Machines for assembling batteries
    • H01M10/0409—Machines for assembling batteries for cells with wound electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • 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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/46—Separators, membranes or diaphragms characterised by their combination with electrodes
    • H01M50/461—Separators, membranes or diaphragms characterised by their combination with electrodes with adhesive layers between electrodes and separators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention relates to the technical field of battery winding, and in particular to a battery winding method and device.
  • the main structure of the current ion battery mainly consists of positive electrode, negative electrode, separator, electrolyte, sealed outer packaging, etc.
  • the positive electrode and negative electrode inside the battery are separated by a non-conductive and porous separator, which blocks electron transmission and provides ion channels at the same time. , Therefore, in the current battery cell production process, three materials, namely the positive electrode piece, the negative electrode piece, and the separator, are first prepared, and then the three materials are compounded together by winding or lamination.
  • the positive electrode, negative electrode, and separator are unrolled separately, and the three materials are rolled together on the winding needle.
  • the final winding core is such that there is a separator between each layer of positive electrode and negative electrode to separate them. , preventing direct contact and acting as an insulator to block electron transmission between the positive and negative electrodes.
  • the film roll Since during the winding process, the film roll is fed and wound separately on the winding needle, the core obtained by the winding must strictly ensure that the positive electrode, negative electrode, and separator are relatively flush, so the film material of each film roll needs to be Applying a certain tension to ensure the material line is straight will easily affect the efficiency of the coil.
  • the separator is usually a polymer film, which is prone to deformation after being subjected to tension.
  • the separator and pole pieces will undergo stress release and retraction during the resting process, subsequent production process, and use of the roll core.
  • the elastic modulus of the pole piece and the separator are inconsistent, which ultimately leads to defects such as wrinkles in the pole piece or an S-shaped winding core.
  • the negative electrode piece will expand during use, aggravating this phenomenon. Defects in the winding core and pole pieces will affect the interface during the charge and discharge reaction of the battery core, and long-term use will gradually worsen and accelerate the attenuation of the battery core performance.
  • the object of the present invention is to provide a battery winding method and device, which method is used to solve the problems in the prior art that the pole pieces are wrinkled or the winding core becomes S-shaped, and the winding efficiency is low.
  • the present invention provides a battery winding method, which method includes the following steps: providing a first diaphragm group including a positive electrode piece, a second diaphragm group including a negative electrode piece, and a winding device for winding operation. a rolling mechanism, and the first diaphragm group and/or the second diaphragm group are provided with a diaphragm; the first diaphragm group and the second diaphragm group are rolled up through the winding mechanism , obtaining a battery core in which the positive electrode piece and the negative electrode piece are spaced in sequence, and the separator is provided between any adjacent positive electrode piece and the negative electrode piece in the battery core .
  • the beneficial effect of the battery winding method of the present invention is that the first diaphragm group and the second diaphragm are formed by bonding the separator to the positive electrode piece and/or the negative electrode piece in advance. group, and then winding up the first diaphragm group and the second diaphragm group, so that the pulling force on the separator and the positive electrode piece or the negative electrode piece is equal, thereby making the separator and the
  • the deformation of the positive electrode piece or the negative electrode piece during the winding process is consistent, so that when the wound battery is retracted after subsequent stress release, the deformation of the electrode piece and the separator are equal, so that the pole piece and the separator will not Wrinkles will not occur or the core will not become S-shaped, ensuring the normal use and service life of the battery, and the battery core will be obtained by directly winding the first diaphragm group and the second diaphragm group.
  • the first diaphragm group and/or the second diaphragm group are provided with a separator, which specifically includes: fitting the separator to the positive electrode sheet and/or the The negative electrode plate is used to obtain the first diaphragm group and the second diaphragm group.
  • the beneficial effect is that by fitting the separator to the positive electrode piece and/or the negative electrode piece, the first diaphragm group and the second diaphragm group can be obtained, which facilitates subsequent processing. Describe the battery core winding process.
  • the fitting of the separator to the positive electrode piece or the negative electrode piece specifically includes: fitting the separator to the positive electrode piece or the negative electrode piece. both sides of the pole piece.
  • the beneficial effect is that by arranging the separator on both sides of the positive electrode piece or the negative electrode piece, any two adjacent layers of pole pieces (any adjacent ones) of the pole piece during winding can be There is a layer of separator between the positive electrode plate and the negative electrode plate), so that the separator can hinder the transmission of electrons and provide ion channels between adjacent electrode plates on any two sides, ensuring the normal operation of the battery.
  • fitting the separator to the positive electrode piece and the negative electrode piece specifically includes: fitting the separator to the positive electrode piece and the negative electrode respectively.
  • the positive electrode piece and the negative electrode piece are rolled up, and during the rolling process, the side of the positive electrode piece with the separator attached and the side of the negative electrode piece with the separator on it is close to or away from each other.
  • the rewinding center of the rewinding mechanism specifically includes: fitting the separator to the positive electrode piece and the negative electrode respectively.
  • the beneficial effect is that during the rewinding process, the separators on the positive electrode piece and the negative electrode piece respectively attached with the separators are arranged on the sides that are close to or both far away from the rewinding center of the rewinding mechanism. , so that there is a layer of separator between any two adjacent pole pieces, so that the separator between the adjacent pole pieces on any two sides can hinder electron transmission and provide ion channels at the same time, ensuring the normal operation of the battery. .
  • a roll-changing mechanism is provided, and there are at least two rewinding mechanisms; the first diaphragm group and the second diaphragm group are changed by the rewinding mechanism.
  • Rewinding specifically includes: rewinding the first diaphragm group and the first diaphragm group through a rewinding mechanism.
  • the rewinding mechanism changes the volume through the rewinding mechanism.
  • the mechanism switches the winding of the first diaphragm group and the second diaphragm group to another winding mechanism for winding.
  • At least two guide assemblies are provided: before winding the first diaphragm group and the first diaphragm group through the winding mechanism, the method further includes: winding the first diaphragm group through the two Two guide assemblies respectively adjust the movement directions of the first diaphragm group and the second diaphragm group.
  • the beneficial effect is that by arranging at least two guide components, the first diaphragm group and the second diaphragm group are guided respectively, and the first diaphragm group and the second diaphragm group are adjusted.
  • the diaphragm group moves in the direction of the winding mechanism to improve the smoothness of the movement of the diaphragm group.
  • the present invention provides a battery winding device for winding batteries using the battery winding method described in any of the possible embodiments of the first aspect.
  • the device includes: a first unwinding mechanism , a second unwinding mechanism and a first rewinding mechanism; the first unwinding mechanism is provided with the first diaphragm group and is used to unwind the first diaphragm group; the second unwinding mechanism The mechanism is provided with the second diaphragm group and is used to discharge the second diaphragm group; one end of the first diaphragm group and the second diaphragm group are connected to the first retracting A winding mechanism, the first winding mechanism is used to wind the first diaphragm group and the second diaphragm group.
  • the beneficial effect of the battery winding device of the present invention is to unwind the first diaphragm group and the second diaphragm group through the first unwinding mechanism and the second unwinding mechanism respectively, and The first diaphragm group and the second diaphragm group are rolled up by the first winding mechanism, and then wound into a battery core, so that during winding, the separator and the pole The deformation caused by the pulling of the sheet is equal, so that the pole piece and separator will not wrinkle or the winding core will not become S-shaped, and the winding efficiency is high.
  • it also includes at least two first guide components; the first diaphragm group and the second diaphragm group respectively extend to the first through at least one first guide component.
  • Winding mechanism, the first guide component is used to adjust the movement direction of the first diaphragm group and the second diaphragm group.
  • the beneficial effect is that the first diaphragm group and the second diaphragm group are respectively guided by two or more first guide components, and the first diaphragm group and the second diaphragm group are lifted. The smoothness of the movement of the diaphragm group.
  • it also includes a roll-changing mechanism; there are at least two roll-up mechanisms, and the roll-changing mechanism is used to change the first diaphragm group and the second diaphragm group from The winding of one first winding mechanism is switched to the other first winding mechanism for winding.
  • the beneficial effect is that by adjusting the winding positions of the first diaphragm group and the second diaphragm group through the roll changing mechanism, the first diaphragm group and the second diaphragm group can be After one of the first winding mechanisms is wound to a certain extent, the winding work is adjusted to another first winding mechanism, which can improve work efficiency.
  • it also includes a positive electrode unwinding mechanism, a negative electrode unwinding mechanism, a separator unwinding mechanism, a second winding mechanism and a laminating mechanism;
  • the positive electrode unwinding mechanism is provided with a positive electrode piece and is used for The positive electrode piece is unloaded;
  • the negative electrode unwinding mechanism is provided with a negative electrode piece, and is used to unload the negative electrode piece;
  • the diaphragm unwinding mechanism is provided with a diaphragm, and is used to unwind the diaphragm.
  • Unloading is carried out; the positive electrode piece, the negative electrode piece and the separator are connected to the second winding mechanism through the laminating mechanism, and the laminating mechanism controls the positive electrode piece, the negative electrode At least one of the pole piece and the separator is coated with glue; the laminating mechanism is used to fit the separator to the positive pole piece and/or the negative pole piece; the second winding mechanism It is used to wind up the positive electrode piece, the negative electrode piece and the separator to obtain the first diaphragm group and the second diaphragm group.
  • the beneficial effect is that the separator is bonded to the positive electrode piece and/or the negative electrode piece by applying glue, so that the separator and the positive electrode piece and/or the negative electrode piece are adhered to each other. combine.
  • a second guide component is also included; the positive electrode piece and/or the negative electrode piece are connected to the fitting mechanism through the second guide component, and the second guide component Used to adjust the movement direction of the positive electrode piece and/or the negative electrode piece.
  • the beneficial effect is that the second guide component guides the joined positive electrode piece and/or the negative electrode piece, so that the movement of the positive electrode piece and/or the negative electrode piece can be adjusted. direction.
  • Figure 1 is a schematic flow chart of a battery winding method in the first embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of the battery winding device in the second embodiment of the present invention.
  • Figure 3 is a schematic structural diagram of the first diaphragm group and the second diaphragm group in Figure 2;
  • Figure 4 is a schematic structural diagram of the first diaphragm group and the second diaphragm group in the third embodiment of the present invention.
  • Figure 5 is a schematic structural diagram of the first diaphragm group and the second diaphragm group in the fourth embodiment of the present invention.
  • Figure 6 is a partial structural schematic diagram of the positive electrode unwinding mechanism and the separator unwinding mechanism in Figure 2;
  • Figure 7 is a partial structural schematic diagram of the negative electrode unwinding mechanism and the separator unwinding mechanism in Figure 2;
  • Figure 8 is a schematic structural diagram of the battery winding device in the fifth embodiment of the present invention.
  • embodiments of the present invention provide a battery winding method and device.
  • Figure 1 is a schematic flow chart of a battery winding method in the first embodiment of the present invention.
  • Figure 2 is a schematic structural diagram of a battery winding device in the second embodiment of the present invention.
  • Figure 3 is a schematic diagram of the first diaphragm group and the battery winding device in Figure 2.
  • Figure 4 is a schematic structural diagram of the first diaphragm group and the second diaphragm group in the third embodiment of the present invention.
  • Figure 5 is a first diaphragm group in the fourth embodiment of the present invention. Structural diagram of the first group and the second diaphragm group.
  • the battery winding method includes the following steps:
  • the first diaphragm group 15 includes the positive electrode piece 9
  • the second diaphragm group 16 includes the negative electrode piece 10
  • the first diaphragm group 15 and/or the The second diaphragm group 16 is provided with a diaphragm 11 .
  • the positive electrode piece 9 usually refers to an electrode piece with a high potential that contains an active substance that undergoes a reduction reaction during discharge.
  • the negative electrode piece 10 usually refers to an electrode piece with a low potential that contains an active substance that undergoes a reduction reaction during discharge.
  • the separator 11 is not Made of conductive material, the separator 11 is provided with a porous structure that blocks electron transmission and provides ion channels at the same time.
  • the winding mechanism is a rotating shaft driven by a motor, which provides the main force for winding the pole piece and the diaphragm 11 .
  • the separator 11 is first attached to the positive electrode piece 9 and/or the negative electrode piece 10 to obtain the first diaphragm group 15 and the second diaphragm group 16, and then through the The winding mechanism winds up the first diaphragm group 15 and the second diaphragm group 16, driving the pole pieces and the diaphragm 11 in the diaphragm group to move synchronously to avoid the pole pieces and the The diaphragm 11 is deformed differently to avoid wrinkles.
  • the winding mechanism is the first winding mechanism 5 .
  • the first diaphragm group 15 and/or the second diaphragm group 16 are provided with a diaphragm 11 , which specifically includes: fitting the diaphragm 11 to the positive electrode plate 9 and/or the negative electrode plate 10 to obtain the first diaphragm group 15 and the second diaphragm group 16 .
  • the separator 11 is attached to the positive electrode piece 9 and/or the negative electrode piece 10 in the following situations: 1) the separator 11 is attached to the positive electrode piece 9 and/or the negative electrode piece 10 On both sides of the positive electrode piece 9, 2) fit the separator 11 to both sides of the negative electrode piece 10, 3) fit a layer of the separator 11 to the positive electrode piece 9, and A layer of the separator 11 is attached to the negative electrode piece 10 .
  • the separator 11 is provided in two or more layers, that is, at least one layer of separator 11 is disposed between any two adjacent pole pieces of the rolled core.
  • the separators 11 attached to both sides of the positive electrode piece 9 or the negative electrode piece 10 are formed into an integrated structure.
  • the same separator 11 is folded during lamination, so that the same separator 11 is disposed on both sides of the positive electrode piece 9 or the negative electrode piece 10 , and can also be rolled up. At least one layer of separator 11 is disposed between any two adjacent pole pieces of the formed winding core.
  • attaching the separator 11 to the positive electrode piece 9 or the negative electrode piece 10 specifically includes: attaching the separator 11 to the positive electrode piece 9 or the negative electrode piece 10 . are disposed on both sides of the positive electrode piece 9 or the negative electrode piece 10 .
  • the separator 11 is attached to both sides of the positive electrode piece 9 , and the side surfaces of the negative electrode piece 10 are not attached to the separator 11 .
  • the separator 11 is attached to both sides of the negative electrode piece 10 , and the side surfaces of the positive electrode piece 9 are not attached to the separator 11 .
  • the separator 11 is disposed closely to the positive electrode piece 9 , and the negative electrode piece 10 can also be disposed closely to the separator 11 , that is, any two adjacent ones There are two layers of separators 11 between the pole pieces.
  • the separator 11 is attached to the positive electrode piece 9 and the negative electrode piece 10 , specifically including: attaching the separator 11 to the positive electrode piece 9 and the negative electrode piece 10 respectively.
  • the first diaphragm set 15 and the second diaphragm set 16 are rolled up by the winding mechanism, which specifically includes: :
  • the positive electrode piece 9 and the negative electrode piece 10 attached to the separator 11 are rolled up by the winding mechanism.
  • the positive electrode piece 9 and the negative electrode piece 10 attached to the separator 11 are rolled up.
  • the side of the positive electrode piece 9 and the negative electrode piece 10 on which the separator 11 is attached is close to or far away from the winding center of the winding mechanism.
  • At least one layer of the separator 11 is disposed on both sides of the positive electrode piece 9 and the negative electrode piece 10 , and when being rolled up, the first diaphragm group 15
  • the diaphragms 11 on the second diaphragm group 16 and the second diaphragm group 16 are all located on the sides close to or away from the winding center of the winding mechanism, so that the diaphragms 11 are disposed between any two adjacent pole pieces.
  • the separator 11 on the positive electrode sheet 9 is located on the side close to the negative electrode sheet 10
  • the separator 11 on the negative electrode sheet 10 is located away from the positive electrode sheet 10 . 9; or, during winding, the separator 11 on the positive electrode piece 9 is located on the side away from the negative electrode piece 10, and the separator 11 on the negative electrode piece 10 is located close to the positive electrode piece.
  • a roll-changing mechanism 8 is provided, and there are at least two rewinding mechanisms; Winding up the group 15 and the second diaphragm group 16 specifically includes: winding up the first diaphragm group 15 and the second diaphragm group 16 through a winding mechanism. After the mechanism winds up to a certain extent, the winding mechanism 8 switches the winding of the first diaphragm group 15 and the second diaphragm group 16 to another winding mechanism for winding.
  • two rewinding mechanisms are provided, and the rewinding mechanism 8 is provided.
  • the first diaphragm group 15 and the first diaphragm group 15 are exchanged by one rewinding mechanism.
  • the second diaphragm group 16 is rolled up, and when it is rolled up to a certain extent, the winding positions of the first diaphragm group 15 and the second diaphragm group 16 are adjusted by the roll changing mechanism 8, and then By rewinding through another rewinding mechanism, the rewinding work can be continued, the interval time is reduced, and the work efficiency is improved.
  • a shearing mechanism (not shown in the figure) is also provided. After the winding position of the film group 16 is switched, the shearing mechanism is used to cut the film groups connected in the middle of the two winding mechanisms, which facilitates the disassembly of the completed winding core and can also be used for subsequent operations. Prepare for switching the winding position.
  • At least two guide assemblies are provided: before the first diaphragm group 15 and the second diaphragm group 16 are to be moved through the winding mechanism, Before rolling up, the method further includes: adjusting the movement directions of the first diaphragm group 15 and the second diaphragm group 16 respectively through the two guide assemblies.
  • the guide component is the first guide component 6
  • the first diaphragm group 15 and the second diaphragm group 16 pass through at least one of the first guide components 6 respectively.
  • Extending to the rewinding mechanism that is, at least one first guide component 6 is provided in the movement direction of the first diaphragm group 15 or between the first diaphragm group 15 and the rewinding mechanism.
  • the second diaphragm group 16 is provided with at least one first guide component 6 in the same manner as the first diaphragm group 15 to adjust the movement direction.
  • Figure 6 is a partial structural schematic diagram of the positive electrode unwinding mechanism and the separator unwinding mechanism in Figure 2.
  • Figure 7 is a partial structural schematic diagram of the negative electrode unwinding mechanism and the separator unwinding mechanism in Figure 2.
  • Figure 8 is a fifth embodiment of the present invention. Structural diagram of the medium battery winding device.
  • the battery winding device uses the battery winding method in the above embodiments to wind the battery, including: a first unwinding mechanism 12, a second unwinding mechanism mechanism 13 and the first rewinding mechanism 5;
  • the first unwinding mechanism 12 is provided with the first diaphragm group 15 and is used to unwind the first diaphragm group 15;
  • the second unwinding mechanism The mechanism 13 is provided with the second diaphragm group 16 and is used to discharge the second diaphragm group 16; one end of the first diaphragm group 15 and the second diaphragm group 16 is connected to
  • the first winding mechanism 5 is used to wind the first diaphragm group 15 and the second diaphragm group 16 .
  • the first unwinding mechanism 12, the second unwinding mechanism 13 and the first rewinding mechanism 5 are all rotating rollers driven by a motor, and the first diaphragm group 15 is arranged on the rotating roller of the first unwinding mechanism 12, and the second film group 16 is arranged on the rotating roller of the second unwinding mechanism 13.
  • the rotating roller can be driven to rotate by the action of the motor, so that The roll material of the first diaphragm group 15 and the second diaphragm group 16 is unloaded, and the first winding mechanism 5 is used to unwind the first diaphragm group 15 and the second diaphragm group. 16 is rolled up to obtain the battery core.
  • At least two first guide assemblies 6 are also included; the first diaphragm group 15 and the second diaphragm group 16 respectively pass through at least one of the first
  • the guide assembly 6 extends to the first winding mechanism 5 , and the first guide assembly 6 is used to adjust the movement direction of the positive electrode piece 9 and the negative electrode piece 10 .
  • the first guide component 6 is a driven roller, and the side walls of the first diaphragm group 15 are arranged tangent to the side walls of the first guide component 6, as described below.
  • the first diaphragm group 15 extends to the first winding mechanism, and the side wall of the second diaphragm group 16 is tangent to the side wall of the other first guide component 6.
  • the second diaphragm group 16 The sheet group 16 extends to the first winding component.
  • two or more first guide components 6 that are tangent to the first diaphragm group 15 may be provided.
  • a roll-changing mechanism 8 is also included; there are at least two first rewinding mechanisms 5, and the roll-changing mechanism 8 is used to change the first rewinding mechanism 5.
  • a diaphragm group 15 and the second diaphragm group 16 are switched from the winding of one of the first winding mechanisms 5 to the winding of the other first winding mechanism 5 .
  • two or more first winding mechanisms 5 are provided, and the winding mechanism 8 is provided so that the winding work of one first winding mechanism 5 can be completed. Finally, the winding position of the first diaphragm group 15 and the second diaphragm group 16 is switched to the other first winding mechanism 5 through the winding mechanism 8 to continue the winding work.
  • the present invention also includes a positive electrode unwinding mechanism 1, a negative electrode unwinding mechanism 2, a separator unwinding mechanism 3, a second rewinding mechanism 14 and a laminating mechanism 4;
  • the positive unwinding mechanism 1 is provided with a positive electrode piece 9 and is used to unload the positive electrode piece 9;
  • the negative electrode unwinding mechanism 2 is provided with a negative electrode piece 10 and is used to unload the negative electrode piece 10.
  • the separator unwinding mechanism 3 is provided with a separator 11 and is used to unload the separator 11; the positive electrode piece 9, the negative electrode piece 10 and the separator 11 pass through the laminating mechanism 4 is connected to the second winding mechanism 14, and the laminating mechanism 4 applies glue to at least one of the positive electrode piece 9, the negative electrode piece 10 and the separator 11; the laminating mechanism 4 is used to fit the separator 11 to the positive electrode piece 9 and/or the negative electrode piece 10; the second winding mechanism 14 is used to wind up the positive electrode piece 9 and the negative electrode piece 10.
  • the pole piece 10 and the diaphragm 11 form the first diaphragm group 15 and the second diaphragm group 16 .
  • the structure of the positive electrode unwinding mechanism 1 , the negative electrode unwinding mechanism 2 and the separator unwinding mechanism 3 is the same as that of the first unwinding mechanism 12 .
  • the positive electrode piece 9 is arranged on the rotating roller of the positive electrode unwinding mechanism 1
  • the negative electrode piece 10 is arranged on the rotating roller of the negative electrode unwinding mechanism 2
  • the separator 11 is arranged on the separator unwinding mechanism.
  • the rotating roller of the winding mechanism 3 can be driven to rotate by the action of the motor, so that the positive electrode piece 9, the negative electrode piece 10 and the separator 11 are discharged.
  • the laminating mechanism 4 is used to laminate the separator 11 to the positive electrode piece 9 and/or the negative electrode piece 10 .
  • the laminating mechanism 4 applies glue to at least one of the positive electrode piece 9 , the negative electrode piece 10 and the separator 11 ; the laminating mechanism 4 is used to glue the The separator 11 is attached to both sides of the positive electrode piece 9 or the negative electrode piece 10 ; or, the attachment mechanism 4 is used to attach the separator 11 to one side of the positive electrode piece 9 , and used to attach the separator 11 to one side of the negative electrode piece 10 .
  • the laminating mechanism 4 applies glue to both sides of the positive electrode piece 9 and the negative electrode piece 10, and then presses the separator 11 between the positive electrode piece 9 and the negative electrode piece 10. /or on both sides of the negative electrode piece 10 , the separator 11 is bonded to the positive electrode piece 9 and/or the negative electrode piece 10 .
  • the laminating mechanism 4 can also apply glue on the diaphragm 11 .
  • first diaphragm group 15 and the second diaphragm group 16 can also be directly bonded and then rolled up.
  • the positive electrode piece 9 and/or the negative electrode piece 10 can also be directly attached to the separator 11 without passing through the second winding mechanism 14
  • the function is directly connected to the first winding mechanism 5 to carry out the winding work of the battery core.
  • a second guide component 7 is also included; the positive electrode piece 9 and/or the negative electrode piece 10 are connected to the The laminating mechanism 4 and the second guide component 7 are used to adjust the movement direction of the positive electrode piece 9 and/or the negative electrode piece 10 .
  • the second guide component 7 has the same structure as the first guide component 6 .
  • the laminating mechanism 4 applies glue to the positive electrode piece 9 and/or the negative electrode piece 10 , or applies glue to the separator 11 , and then presses the positive electrode piece 9 and the negative electrode piece 10 together.
  • the separator 11, or the negative electrode piece 10 and the separator 11 are pressed together to complete the bonding between the positive electrode piece 9 and/or the negative electrode piece 10 and the separator 11 bracket, thereby obtaining the first The diaphragm group 15 and the second diaphragm group 16 .
  • the movement direction of the positive electrode piece 9 and/or the negative electrode piece 10 can be adjusted through the second guide assembly 7 .

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Abstract

本发明提供了一种电池卷绕方法及装置。本发明的电池卷绕方法包括以下步骤：提供包含正极极片的第一膜片组、包含负极极片的第二膜片组和用于收卷工作的收卷机构，且第一膜片组和/或第二膜片组设有隔膜；通过收卷机构对第一膜片组和第二膜片组进行收卷，得到正极极片和负极极片依次间隔的电池卷芯，且电池卷芯中任意相邻的正极极片与负极极片之间均设有隔膜。本发明的电池卷绕方法通过预先将隔膜贴合在正极极片和/或负极极片，形成第一膜片组和第二膜片组，然后对第一膜片组和第二膜片组进行收卷方式，以解决现有技术中极片产生褶皱或卷芯变为S型、且卷料效率低的问题。

Description

电池卷绕方法及装置
交叉引用
本申请要求2022年3月18日提交的申请号为202210270843.8的中国专利申请的优先权。上述申请的内容以引用方式被包含于此。
技术领域
本发明涉及电池卷绕技术领域，尤其涉及一种电池卷绕方法及装置。
技术背景
当前离子电池主要的结构主要由正极、负极、隔膜、电解液、密封外包装等构成，电池内部正极和负极通过不导电且多孔的隔膜隔开，起到阻碍电子传输并同时提供离子通道的作用，因此目前的电芯生产工艺中，首先制备好正极极片、负极极片、隔膜三种材料，通过卷绕或者叠片的方式将三种材料复合在一起。
卷绕的时候将正极、负极、隔膜通过分别放卷，在卷针上将三种材料卷在一起，最终卷绕所得到的卷芯使得每层正极和负极之间都有隔膜将二者分开，使其不能直接接触起到阻断正极和负极间的电子传输的绝缘作用。
由于在卷绕的过程中，膜卷单独在卷针上入料卷绕，卷绕所得到卷芯需要严格保证正极、负极、隔膜相对平齐，因此需要对各个膜卷的膜料上都要施加一定的张力，保证料线平直，容易影响卷料的效率。但隔膜通常为聚合物膜，容易在受到拉力后发生形变，当卷芯完成生产，卷芯在静置过程中、后续生产过程中及使用过程中隔膜和极片均会发生应力释放回缩，但极片和隔膜的弹性模量不一致，最终导致极片产生褶皱或卷芯变为S型等缺陷。且 负极极片在使用过程中会发生膨胀，加重该现象。卷芯和极片的缺陷会影响电芯充放电反应时的界面，长期使用会逐渐恶化加速电芯性能的衰减。
发明概要
本发明的目的在于提供一种电池卷绕方法及装置，该方法用以解决现有技术中极片产生褶皱或卷芯变为S型、且卷料效率低的问题。
第一方面，本发明提供一种电池卷绕方法，该方法包括以下步骤：提供包含正极极片的第一膜片组、包含负极极片的第二膜片组和用于收卷工作的收卷机构，且所述第一膜片组和/或所述第二膜片组设有隔膜；通过所述收卷机构对所述第一膜片组和所述第二膜片组进行收卷，得到所述正极极片和所述负极极片依次间隔的电池卷芯，且所述电池卷芯中任意相邻的所述正极极片与所述负极极片之间均设有所述隔膜。
本发明的电池卷绕方法的有益效果在于：通过预先将所述隔膜贴合在所述正极极片和/或所述负极极片，形成所述第一膜片组和所述第二膜片组，然后对所述第一膜片组和所述第二膜片组进行收卷，能够使得隔膜与所述正极极片或所述负极极片受到的拉扯力度相等，进而使得隔膜与所述正极极片或所述负极极片在卷绕过程中发生的形变一致，使得卷绕完成的电池在后续应力释放回缩时，极片和隔膜的形变相等，进而使得极片和隔膜不会产生褶皱或卷芯不会变为S型，保证电池的正常使用和使用寿命，且通过直接对所述第一膜片组和所述第二膜片组进行卷绕的方式得到电池卷芯，相比于对正负极片和隔膜分别卷绕的方式更加直接、简便，便于提升电池卷芯的卷绕效率。
在一种可能的实现方案中，所述第一膜片组和/或所述第二膜片组设有隔膜，具体包括：将所述隔膜贴合设置于所述正极极片和/或所述负极极片，得 到所述第一膜片组和所述第二膜片组。其有益效果在于：通过将所述隔膜贴合设置于所述正极极片和/或所述负极极片，进而能够得到所述第一膜片组和所述第二膜片组，便于后续所述电池卷芯卷绕的进行。
在一种可能的实现方案中，所述将所述隔膜贴合设置于所述正极极片或所述负极极片具体包括：将所述隔膜贴合设置于所述正极极片或所述负极极片的两侧。其有益效果在于：通过将所述隔膜贴合设置于所述正极极片或所述负极极片的两侧，使所述极片在卷绕时任意相邻的两层极片(任意相邻的正极极片和负极极片)之间均存在一层隔膜，使得任意两侧相邻的极片之间能够通过隔膜起到阻碍电子传输并同时提供离子通道的作用，保证电池的正常工作。
在一种可能的实现方案中，将所述隔膜贴合设置于所述正极极片和所述负极极片，具体包括：将所述隔膜分别贴合设置于所述正极极片和所述负极极片的一侧；通过所述收卷机构对所述第一膜片组和所述第二膜片组进行收卷，具体包括：通过所述收卷机构对贴合有所述隔膜的所述正极极片和所述负极极片进行收卷，在收卷过程中所述贴合有所述隔膜的所述正极极片和所述负极极片中贴有隔膜的一侧均靠近或远离所述收卷机构的收卷轴心。其有益效果在于：通过在收卷过程中，将分别贴有所述隔膜的所述正极极片和所述负极极片上隔膜设置于均靠近或均远离所述收卷机构的收卷轴心的侧面，使得任意相邻的两层极片之间均存在一层隔膜，使得任意两侧相邻的极片之间能够通过隔膜起到阻碍电子传输并同时提供离子通道的作用，保证电池的正常工作。
在一种可能的实现方案中，提供换卷机构，且所述收卷机构设置为至少 两个；所述通过所述收卷机构对所述第一膜片组和所述第二膜片组进行收卷具体包括：通过一个所述收卷机构对所述第一膜片组和所述第一膜片组进行收卷，当该收卷机构收卷至一定程度后，通过所述换卷机构将对所述第一膜片组和所述第二膜片组的收卷切换至另一个所述收卷机构进行收卷。其有益效果在于：通过所述换卷机构，并通过两个或多个所述收卷机构实现不同收卷机构之间的切换，能够提升工作效率。
在一种可能的实现方案中，提供至少两个导向组件：在通过所述收卷机构对所述第一膜片组和所述第一膜片组进行收卷之前还包括：通过所述两个导向组件分别对所述第一膜片组和所述第二膜片组的运动方向进行调整。其有益效果在于：通过设置至少两个所述导向组件，分别对所述第一膜片组和所述第二膜片组进行导向，调整所述第一膜片组和所述第二膜片组运动至所述收卷机构的方向，提升膜片组运动的流畅性。
第二方面，本发明提供一种电池卷绕装置，用于以上述第一方面中任一种可能的实施方案所述的电池卷绕方法进行电池卷绕，该装置包括：第一放卷机构、第二放卷机构和第一收卷机构；所述第一放卷机构设有所述第一膜片组，并用于对所述第一膜片组进行放料；所述第二放卷机构设有所述第二膜片组，并用于对所述第二膜片组进行放料；所述第一膜片组和所述第二膜片组的一端均连接至所述第一收卷机构，所述第一收卷机构用于收卷所述第一膜片组和所述第二膜片组。
本发明的电池卷绕装置的有益效果在于：通过所述第一放卷机构和所述第二放卷机构分别对所述第一膜片组和所述第二膜片组进行放料，并通过所述第一收卷机构对所述第一膜片组和所述第二膜片组进行收卷，进而卷绕成 电池卷芯，这样在进行卷绕时，所述隔膜与所述极片受到拉扯产生的形变相等，使得极片和隔膜不会产生褶皱或卷芯不会变为S型等缺陷，且卷绕效率高。
在一种可能的实现方案中，还包括至少两个第一导向组件；所述第一膜片组和所述第二膜片组分别通过至少一个所述第一导向组件延伸至所述第一收卷机构，所述第一导向组件用于调整所述第一膜片组和所述第二膜片组的运动方向。其有益效果在于：通过两个或多个所述第一导向组件分别对所述第一膜片组和所述第二膜片组进行导向，提升所述第一膜片组和所述第二膜片组运动的流畅性。
在一种可能的实现方案中，还包括换卷机构；所述收卷机构设置为至少两个，所述换卷机构用于将所述第一膜片组和所述第二膜片组从一个所述第一收卷机构的收卷切换至另一个所述第一收卷机构进行收卷。其有益效果在于：通过所述换卷机构调整所述第一膜片组和所述第二膜片组的收卷位置，可以在所述第一膜片组和所述第二膜片组在一个所述第一收卷机构上卷绕至一定程度后，将收卷工作调整至另一个第一收卷机构，能够提升工作效率。
在一种可能的实现方案中，还包括正极放卷机构、负极放卷机构、隔膜放卷机构、第二收卷机构和贴合机构；所述正极放卷机构设有正极极片，并用于对所述正极极片进行放料；所述负极放卷机构设有负极极片，并用于对所述负极极片进行放料；所述隔膜放卷机构设有隔膜，并用于对所述隔膜进行放料；所述正极极片、所述负极极片和所述隔膜经所述贴合机构连接至所述第二收卷机构，所述贴合机构对所述正极极片、所述负极极片和所述隔膜中的至少一个进行涂胶；所述贴合机构用于将所述隔膜贴合设置于所述正极 极片和/或所述负极极片；所述第二收卷机构用于收卷所述正极极片、所述负极极片和所述隔膜得到所述第一膜片组和所述第二膜片组。其有益效果在于：通过涂胶将所述隔膜与所述正极极片和/或所述负极极片进行粘合，使得所述隔膜与所述正极极片和/或所述负极极片实现贴合。
在一种可能的实现方案中，还包括第二导向组件；所述正极极片和/或所述负极极片经所述第二导向组件连接至所述贴合机构，所述第二导向组件用于调整所述正极极片和/或所述负极极片的运动方向。其有益效果在于：通过所述第二导向组件对贴合后的所述正极极片和/或所述负极极片进行导向，能够调整所述正极极片和/或所述负极极片的运动方向。
附图说明
图1为本发明第一种实施例中电池卷绕方法的流程示意图；
图2为本发明第二种实施例中电池卷绕装置的结构示意图；
图3为图2中第一膜片组和第二膜片组的结构示意图；
图4为本发明第三种实施例中第一膜片组和第二膜片组的结构示意图；
图5为本发明第四种实施例中第一膜片组和第二膜片组的结构示意图；
图6为图2中正极放卷机构和隔膜放卷机构的部分结构示意图；
图7为图2中负极放卷机构和隔膜放卷机构的部分结构示意图；
图8为本发明第五种实施例中电池卷绕装置的结构示意图。
图中标号：
1、正极放卷机构；
2、负极放卷机构；
3、隔膜放卷机构；
4、贴合机构；
5、第一收卷机构；
6、第一导向组件；
7、第二导向组件；
8、换卷机构；
9、正极极片；
10、负极极片；
11、隔膜；
12、第一放卷机构；
13、第二放卷机构；
14、第二收卷机构；
15、第一膜片组；
16、第二膜片组。
发明内容
为使本发明的目的、技术方案和优点更加清楚，下面将结合本发明的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。除非另外定义，此处使用的技术术语或者科学术语应当为本发明所属领域内具有一般技能的人士所理解的通常意 义。本文中使用的“包括”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同，而不排除其他元件或者物件。
针对现有技术存在的问题，本发明的实施例提供了一种电池卷绕方法及装置。
图1为本发明第一种实施例中电池卷绕方法的流程示意图，图2为本发明第二种实施例中电池卷绕装置的结构示意图，图3为图2中第一膜片组和第二膜片组的结构示意图，图4为本发明第三种实施例中第一膜片组和第二膜片组的结构示意图，图5为本发明第四种实施例中第一膜片组和第二膜片组的结构示意图。
本发明的一些实施例中，如图1至图5所示，该电池卷绕方法包括以下步骤：
S1、提供第一膜片组15、第二膜片组16和收卷机构；
S2、通过所述收卷机构对所述第一膜片组15和所述第二膜片组16进行收卷，得到所述正极极片9和所述负极极片10依次间隔的电池卷芯，且所述电池卷芯中任意相邻的所述正极极片9与所述负极极片10之间均设有所述隔膜11。
本发明的一些具体实施例中，所述第一膜片组15包含正极极片9，所述第二膜片组16包含负极极片10，且所述第一膜片组15和/或所述第二膜片组16设有隔膜11。正极极片9通常指含有在放电时发生还原反应活性物质的具有高电势的电极片，负极极片10通常指含有在放电时发生还原反应活性物质的具有低电势的电极片，隔膜11为不导电材料制成，隔膜11上设有 阻碍电子传输并同时提供离子通道的多孔结构。收卷机构为电机带动的转轴，提供极片和隔膜11收卷的主动力。使用时，先将所述隔膜11贴合在所述正极极片9和/或所述负极极片10，得到所述第一膜片组15和所述第二膜片组16，再通过所述收卷机构对所述第一膜片组15和所述第二膜片组16进行收卷，带动所述膜片组中的极片和隔膜11同步运动，避免所述极片和所述隔膜11受到的形变不一，避免褶皱情况的发生。
在一些实施了中，所述收卷机构即所述第一收卷机构5。
本发明的一些实施例中，所述第一膜片组15和/或所述第二膜片组16设有隔膜11，具体包括：将所述隔膜11贴合设置于所述正极极片9和/或所述负极极片10，得到所述第一膜片组15和所述第二膜片组16。
本发明的一些具体实施例中，将所述隔膜11贴合设置于所述正极极片9和/或所述负极极片10存在一下情况：1)将所述隔膜11贴合设置于所述正极极片9的两侧，2)将所述隔膜11贴合设置于所述负极极片10的两侧，3)将一层所述隔膜11贴合设置于所述正极极片9，并将一层所述隔膜11贴合设置于所述负极极片10。
在一些实施例中，所述隔膜11设置为两层或多层，即收卷成形的卷芯的任意两个相邻的极片之间均设置有至少一层隔膜11。
在另外一些实施例中，贴合设置于所述正极极片9或所述负极极片10两侧的所述隔膜11设置为一体结构。在一些实施例中，在贴合时将同一个隔膜11进行翻折，使得同一个隔膜11贴合设置于所述正极极片9或所述负极极片10的两侧，同样能够在收卷成形的卷芯的任意两个相邻的极片之间均设置有至少一层隔膜11。
本发明的一些实施例中，如图1至图3所示，所述将所述隔膜11贴合设置于所述正极极片9或所述负极极片10具体包括：将所述隔膜11贴合设置于所述正极极片9或所述负极极片10的两侧。
本发明的一些具体实施例中，将所述隔膜11贴合设置于所述正极极片9的两侧，所述负极极片10的侧面不贴合所述隔膜11。
在另外的一些实施例中，将所述隔膜11贴合设置于所述负极极片10的两侧，所述正极极片9的侧面不贴合所述隔膜11。
在其他的一些实施例中，将所述隔膜11贴合设置于所述正极极片9，同时所述负极极片10也可以贴合设置所述隔膜11，即任意相邻的两个所述极片之间的所述隔膜11的数量存在两层的情况。
本发明的一些实施例中，如图1至图3所示，将所述隔膜11贴合设置于所述正极极片9和所述负极极片10，具体包括：将所述隔膜11分别贴合设置于所述正极极片9和所述负极极片10的一侧；通过所述收卷机构对所述第一膜片组15和所述第二膜片组16进行收卷，具体包括：通过所述收卷机构对贴合有所述隔膜11的所述正极极片9和所述负极极片10进行收卷，在收卷过程中所述贴合有所述隔膜11的所述正极极片9和所述负极极片10中贴有隔膜11的一侧均靠近或远离所述收卷机构的收卷轴心。
本发明的一些具体实施例中，在所述正极极片9和所述负极极片10的一侧均贴合设置至少一层所述隔膜11，收卷时使得所述第一膜片组15和所述第二膜片组16上的隔膜11均位于靠近或远离所述收卷机构的收卷轴心的侧面，使得任意两个相邻的极片之间均设置有所述隔膜11。在一些实施例中，在收卷时，所述正极极片9上的隔膜11位于靠近所述负极极片10的一侧， 所述负极极片10上的隔膜11位于远离所述正极极片9的一侧；或者，在收卷时，所述正极极片9上的隔膜11位于远离所述负极极片10的一侧，所述负极极片10上的隔膜11位于靠近所述正极极片9的一侧。
本发明的一些实施例中，如图1至图3所示，提供换卷机构8，且所述收卷机构设置为至少两个；所述通过所述收卷机构对所述第一膜片组15和所述第二膜片组16进行收卷具体包括：通过一个所述收卷机构对所述第一膜片组15和所述第二膜片组16进行收卷，当该收卷机构收卷至一定程度后，通过所述换卷机构8将对所述第一膜片组15和所述第二膜片组16的收卷切换至另一个所述收卷机构进行收卷。
本发明的一些具体实施例中，将所述收卷机构设置两个，并设置所述换卷机构8，在使用时通过一个所述收卷机构对所述第一膜片组15和所述第二膜片组16进行收卷，当收卷至一定程度后通过所述换卷机构8对所述第一膜片组15和所述第二膜片组16的收卷位置进行调整，之后通过另一个所述收卷机构进行收卷，能够继续进行收卷工作，降低间隔时间，提升工作效率。
值得一说的是，为了便于收卷位置的切换，还设有剪切机构(图中未示出)，当所述换卷机构8进行所述第一膜片组15和所述第二膜片组16的收卷位置的切换后，通过所述剪切机构对两个所述收卷机构中间相连的膜片组进行剪断工作，便于收卷完成的卷芯的拆卸，也能够为后续进行收卷位置的切换做准备。
本发明的一些实施例中，如图1至图3所示，提供至少两个导向组件：在将通过所述收卷机构对所述第一膜片组15和所述第二膜片组16进行收卷之前还包括：通过所述两个导向组件分别对所述第一膜片组15和所述第二 膜片组16的运动方向进行调整。
本发明的一些具体实施例中，所述导向组件即所述第一导向组件6，所述第一膜片组15和所述第二膜片组16分别通过至少一个所述第一导向组件6延伸至所述收卷机构，即在所述第一膜片组15的运动线路或所述第一膜片组15与所述收卷机构之间设置至少一个第一导向组件6进行运动方向的调整，所述第二膜片组16与所述第一膜片组15同理设置至少一个第一导向组件6进行运动方向的调整。
图6为图2中正极放卷机构和隔膜放卷机构的部分结构示意图，图7为图2中负极放卷机构和隔膜放卷机构的部分结构示意图，图8为本发明第五种实施例中电池卷绕装置的结构示意图。
本发明的一些实施例中，如图2至图8所示，该电池卷绕装置通过上述实施例中的电池卷绕方法进行电池卷绕，包括：第一放卷机构12、第二放卷机构13和第一收卷机构5；所述第一放卷机构12设有所述第一膜片组15，并用于对所述第一膜片组15进行放料；所述第二放卷机构13设有所述第二膜片组16，并用于对所述第二膜片组16进行放料；所述第一膜片组15和所述第二膜片组16的一端均连接至所述第一收卷机构5，所述第一收卷机构5用于收卷所述第一膜片组15和所述第二膜片组16。
本发明的一些具体实施例中，所述第一放卷机构12、所述第二放卷机构13和所述第一收卷机构5均为电机带动的转动辊，所述第一膜片组15设置于所述第一放卷机构12的转动辊上，所述第二膜片组16设置于所述第二放卷机构13的转动辊上，通过电机的作用能够带动转动辊转动，使得所述第一膜片组15和所述第二膜片组16的卷料放料，所述第一收卷机构5用于将 所述第一膜片组15和所述第二膜片组16进行收卷，得到电池卷芯。
本发明的一些实施例中，如图2所示，还包括至少两个第一导向组件6；所述第一膜片组15和所述第二膜片组16分别通过至少一个所述第一导向组件6延伸至所述第一收卷机构5，所述第一导向组件6用于调整所述正极极片9和所述负极极片10的运动方向。
本发明的一些具体实施例中，所述第一导向组件6为从动辊，所述第一膜片组15的侧壁与所述第一导向组件6的侧壁相切设置，之后所述第一膜片组15延伸至所述第一收卷机构，所述第二膜片组16的侧壁与另一个所述第一导向组件6的侧壁相切设置，之后所述第二膜片组16延伸至所述第一收卷组件，通过设置所述第一导向组件6能够对所述第一膜片组15和所述第二膜片组16的运动方向进行调整，便于装置的各个机构的布局，便于节省空间。
在一些实施例中，与所述第一膜片组15相切的所述第一导向组件6可以设置两个或多个。
本发明的一些实施例中，如图2至图4所示，还包括换卷机构8；所述第一收卷机构5设置为至少两个，所述换卷机构8用于将所述第一膜片组15和所述第二膜片组16从一个所述第一收卷机构5的收卷切换至另一个所述第一收卷机构5进行收卷。
本发明的一些具体实施例中，将所述第一收卷机构5设置为两个或多个，设置所述换卷机构8，能够在一个所述第一收卷机构5的收卷工作完成后通过所述换卷机构8将所述第一膜片组15和所述第二膜片组16的收卷位置切换至其他的所述第一收卷机构5，持续进行收卷工作。
本发明的一些实施例中，如图2至图8所示，还包括正极放卷机构1、负极放卷机构2、隔膜放卷机构3、第二收卷机构14和贴合机构4；所述正极放卷机构1设有正极极片9，并用于对所述正极极片9进行放料；所述负极放卷机构2设有负极极片10，并用于对所述负极极片10进行放料；所述隔膜放卷机构3设有隔膜11，并用于对所述隔膜11进行放料；所述正极极片9、所述负极极片10和所述隔膜11经所述贴合机构4连接至所述第二收卷机构14，所述贴合机构4对所述正极极片9、所述负极极片10和所述隔膜11中的至少一个进行涂胶；所述贴合机构4用于将所述隔膜11贴合设置于所述正极极片9和/或所述负极极片10；所述第二收卷机构14用于收卷所述正极极片9、所述负极极片10和所述隔膜11得到所述第一膜片组15和所述第二膜片组16。
本发明的一些具体实施例中，所述正极放卷机构1、所述负极放卷机构2和所述隔膜放卷机构3的结构与所述第一放卷机构12相同。所述正极极片9设置于所述正极放卷机构1的转动辊上，所述负极极片10设置于所述负极放卷机构2的转动辊上，所述隔膜11设置于所述隔膜放卷机构3的转动辊上，通过电机的作用能够带动转动辊转动，使得所述正极极片9、所述负极极片10和所述隔膜11放料。所述贴合机构4用于将所述隔膜11贴合设置于所述正极极片9和/或所述负极极片10。
在一些实施例中，所述贴合机构4对所述正极极片9、所述负极极片10和所述隔膜11中的至少一个进行涂胶；所述贴合机构4用于将所述隔膜11贴合设置于所述正极极片9或所述负极极片10的两侧；或者，所述贴合机构4用于将所述隔膜11贴合在所述正极极片9的一侧，并用于将所述隔膜 11贴合在所述负极极片10的一侧。
本发明的一些具体实施例中，所述贴合机构4对所述正极极片9和所述负极极片10的两侧进行涂胶，之后将隔膜11压合在所述正极极片9和/或所述负极极片10的两侧，完成所述隔膜11与所述正极极片9和/或所述负极极片10的贴合。
在其他一些实施例中，所述贴合机构4也可以在所述隔膜11上涂胶。
值得说明的是，在实际使用时也可以通过直接贴合所述第一膜片组15和所述第二膜片组16之后再进行收卷。
此外，在一些实施例中，在实际使用时也可以通过直接将所述正极极片9和/或所述负极极片10进行隔膜11的贴合，之后不经过所述第二收卷机构14的作用，直接连接至所述第一收卷机构5进行电芯的收卷工作。
本发明的一些实施例中，如图2和图6所示，还包括第二导向组件7；所述正极极片9和/或所述负极极片10经所述第二导向组件7连接至所述贴合机构4，所述第二导向组件7用于调整所述正极极片9和/或所述负极极片10的运动方向。
本发明的一些具体实施例中，所述第二导向组件7与所述第一导向组件6结构相同。使用时，所述贴合机构4在所述正极极片9和/或所述负极极片10上涂胶，或者在所述隔膜11上涂胶，之后压合所述正极极片9和所述隔膜11，或者压合所述负极极片10与所述隔膜11，完成所述正极极片9和/或所述负极极片10与隔膜11支架内的贴合，进而得到所述第一膜片组15和所述第二膜片组16。在此之前，可以通过所述第二导向组件7对所述正极极片9和/或所述负极极片10进行运动方向的调整。
虽然在上文中详细说明了本发明的实施方式，但是对于本领域的技术人员来说显而易见的是，能够对这些实施方式进行各种修改和变化。但是，应理解，这种修改和变化都属于权利要求书中所述的本发明的范围和精神之内。而且，在此说明的本发明可有其它的实施方式，并且可通过多种方式实施或实现。

Claims (11)

  1. 一种电池卷绕方法，其特征在于，包括以下步骤：
    提供包含正极极片的第一膜片组、包含负极极片的第二膜片组和用于收卷工作的收卷机构，且所述第一膜片组和/或所述第二膜片组设有隔膜；
    通过所述收卷机构对所述第一膜片组和所述第二膜片组进行收卷，得到所述正极极片和所述负极极片依次间隔的电池卷芯，且所述电池卷芯中任意相邻的所述正极极片与所述负极极片之间均设有所述隔膜。
  2. 根据权利要求1所述电池卷绕方法，其特征在于，所述第一膜片组和/或所述第二膜片组设有隔膜，具体包括：
    将所述隔膜贴合设置于所述正极极片和/或所述负极极片，得到所述第一膜片组和所述第二膜片组。
  3. 根据权利要求2所述电池卷绕方法，其特征在于，所述将所述隔膜贴合设置于所述正极极片或所述负极极片具体包括：
    将所述隔膜贴合设置于所述正极极片或所述负极极片的两侧。
  4. 根据权利要求2所述电池卷绕方法，其特征在于，将所述隔膜贴合设置于所述正极极片和所述负极极片，具体包括：
    将所述隔膜分别贴合设置于所述正极极片和所述负极极片的一侧；
    通过所述收卷机构对所述第一膜片组和所述第二膜片组进行收卷，具体包括：
    通过所述收卷机构对贴合有所述隔膜的所述正极极片和所述负极极片进行收卷，在收卷过程中所述正极极片和所述负极极片中贴有隔膜的一侧均靠近或远离所述收卷机构的收卷轴心。
  5. 根据权利要求1所述电池卷绕方法，其特征在于，提供换卷机构，且所述收卷机构设置为至少两个；
    所述通过所述收卷机构对所述第一膜片组和所述第二膜片组进行收卷 具体包括：
    通过一个所述收卷机构对所述第一膜片组和所述第二膜片组进行收卷，当该收卷机构收卷至一定程度后，通过所述换卷机构将对所述第一膜片组和所述第二膜片组的收卷切换至另一个所述收卷机构进行收卷。
  6. 根据权利要求1所述电池卷绕方法，其特征在于，提供至少两个导向组件：
    在通过所述收卷机构对所述第一膜片组和所述第二膜片组进行收卷之前还包括：通过所述两个导向组件分别对所述第一膜片组和所述第二膜片组的运动方向进行调整。
  7. 一种电池卷绕装置，用于以权利要求1至6中任一项所述的电池卷绕方法进行电池卷绕，其特征在于，包括：第一放卷机构、第二放卷机构和第一收卷机构；
    所述第一放卷机构设有所述第一膜片组，并用于对所述第一膜片组进行放料；
    所述第二放卷机构设有所述第二膜片组，并用于对所述第二膜片组进行放料；
    所述第一膜片组和所述第二膜片组的一端均连接至所述第一收卷机构，所述第一收卷机构用于收卷所述第一膜片组和所述第二膜片组。
  8. 根据权利要求7所述电池卷绕装置，其特征在于，还包括至少两个第一导向组件；
    所述第一膜片组和所述第二膜片组分别通过至少一个所述第一导向组件延伸至所述第一收卷机构，所述第一导向组件用于调整所述第一膜片组和所述第一膜片组的运动方向。
  9. 根据权利要求7所述电池卷绕装置，其特征在于，换卷机构；
    所述第一收卷机构设置为至少两个，所述换卷机构用于将所述第一膜片组和所述第二膜片组与从一个所述第一收卷机构的收卷切换至另一个所述 第一收卷机构进行收卷。
  10. 根据权利要求7所述电池卷绕装置，其特征在于，还包括正极放卷机构、负极放卷机构、隔膜放卷机构、第二收卷机构和贴合机构；
    所述正极放卷机构设有正极极片，并用于对所述正极极片进行放料；
    所述负极放卷机构设有负极极片，并用于对所述负极极片进行放料；
    所述隔膜放卷机构设有隔膜，并用于对所述隔膜进行放料；
    所述正极极片、所述负极极片和所述隔膜经所述贴合机构连接至所述第二收卷机构，所述贴合机构对所述正极极片、所述负极极片和所述隔膜中的至少一个进行涂胶；
    所述贴合机构用于将所述隔膜贴合设置于所述正极极片和/或所述负极极片；
    所述第二收卷机构用于收卷所述正极极片、所述负极极片和所述隔膜得到所述第一膜片组和所述第二膜片组。
  11. 根据权利要求10所述电池卷绕装置，其特征在于，还包括第二导向组件；
    所述正极极片和/或所述负极极片经所述第二导向组件连接至所述贴合机构，所述第二导向组件用于调整所述正极极片和/或所述负极极片的运动方向。
PCT/CN2022/131412 2022-03-18 2022-11-11 电池卷绕方法及装置 WO2023173771A1 (zh)

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