WO2021146932A1 - Appareil d'enroulement de batterie au lithium - Google Patents

Appareil d'enroulement de batterie au lithium Download PDF

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Publication number
WO2021146932A1
WO2021146932A1 PCT/CN2020/073562 CN2020073562W WO2021146932A1 WO 2021146932 A1 WO2021146932 A1 WO 2021146932A1 CN 2020073562 W CN2020073562 W CN 2020073562W WO 2021146932 A1 WO2021146932 A1 WO 2021146932A1
Authority
WO
WIPO (PCT)
Prior art keywords
film guide
winding
film
winding needle
turntable
Prior art date
Application number
PCT/CN2020/073562
Other languages
English (en)
Chinese (zh)
Inventor
汤辉
汤志为
杨凯
郑付成
黄东海
戴保建
周树清
朱纬亚
高云峰
Original Assignee
大族激光科技产业集团股份有限公司
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 大族激光科技产业集团股份有限公司 filed Critical 大族激光科技产业集团股份有限公司
Priority to CN202090000227.5U priority Critical patent/CN215118983U/zh
Priority to PCT/CN2020/073562 priority patent/WO2021146932A1/fr
Publication of WO2021146932A1 publication Critical patent/WO2021146932A1/fr

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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
    • 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 utility model relates to the technical field of lithium battery processing, in particular to a lithium battery winding device.
  • the inside of the lithium battery adopts a spiral wound structure, and a very fine and highly permeable polyethylene film separator is used to separate the positive and negative electrodes.
  • the positive electrode includes a current collector composed of lithium cobalt oxide and aluminum foil, and the negative electrode is composed of a current collector composed of graphitized carbon material and copper foil.
  • the cell membrane composed of the positive electrode, the negative electrode and the separator When processing lithium batteries, it is necessary to wind the cell membrane composed of the positive electrode, the negative electrode and the separator through a winding needle.
  • the two winding needles a are symmetrically arranged on the turntable b through a plane (such as a horizontal plane), which will cause the upper guide wheel c and the lower guide wheel f to be different.
  • the cell membrane 1 between is inclined.
  • the above-mentioned winding device uses two winding needles to wind, although the winding efficiency can be improved to a certain extent.
  • the winding process of the aforementioned winding device is still relatively large, and its processing efficiency needs to be further improved.
  • the technical problem to be solved by the utility model is to provide a lithium battery winding device with higher processing efficiency.
  • the technical solution adopted by the utility model to solve its technical problems is to provide a lithium battery winding device, which includes a turntable rotating around a main shaft, a first winding needle and a second winding needle for clamping and winding the battery cell membrane , Using an upper film guiding mechanism and a lower film guiding mechanism for guiding the cell film and a film cutting mechanism for cutting the cell film, the lower film guiding mechanism is arranged on the turntable and rotates with the turntable;
  • the first winding needle and the second winding needle are both rotatably arranged on the turntable through a fulcrum, and are symmetrical with respect to the center of the main shaft; the electric core guided by the upper film guiding mechanism and the lower film guiding mechanism A film, a section of which is located between the upper film guide mechanism and the lower film guide mechanism passes through the supporting shaft of the first winding needle or the second winding needle; wherein the main shaft and the supporting shaft are parallel to each other.
  • the lower film guiding mechanism includes two lower film guiding parts, and the two lower film guiding parts are both arranged on the turntable and symmetrical with respect to the center of the main shaft.
  • the two lower film guide portions are rotatably arranged on the turntable.
  • the upper film guiding mechanism includes an upper film guiding part, and an outer tangent line of the upper film guiding part and the lower film guiding part passes through the supporting shaft.
  • the two lower film guiding parts and the lower film guiding part are both passing rollers.
  • the lower film guiding mechanism includes four lower film guiding parts, and the four lower film guiding parts are all arranged on the turntable.
  • the film cutting mechanism includes a film cutting power part, a cutter head, and a pressure wheel
  • the pressure wheel is in transmission connection with the film cutting power part
  • the film cutting power part drives the pressure wheel to extend out of the pressure wheel.
  • the lower film guiding parts abut against each other to compress the cell film; the cutter head is in transmission connection with the film cutting power part, and the film cutting power part drives the cutter head to extend and cut the upper film guiding part and The section between the lower guiding membranes.
  • the lower film guide mechanism further includes two top blocks that cooperate with the cutter head, and the two top blocks are both arranged on the turntable and are symmetrical with respect to the center of the spindle;
  • the lower film guide parts are respectively arranged on the two top blocks.
  • the cutter head is a hot cutter head.
  • the lithium battery winding device further includes a first power unit, a second power, and a third power.
  • the first winding needle is in transmission connection with the first power unit, and the first power unit can drive the The first winding needle rotates around a supporting shaft, and can drive the first winding needle to rise and fall along the supporting shaft;
  • the second winding needle is in transmission connection with the second power part, and the second power part can drive the The second winding needle rotates around the supporting shaft and can drive the second winding needle to rise and fall along the supporting shaft;
  • the turntable is in transmission connection with the third power part, and the third power part can drive the turntable to rotate around the main shaft ,
  • the first winding needle and the second winding needle revolve around the main shaft.
  • the utility model provides a lithium battery winding device.
  • the second winding needle first winds the battery cell film. After the second winding needle is finished, it is located between the upper and lower film guide mechanism. A section of the electric core film between the film guiding mechanisms passes through the fulcrum of the first winding needle. Therefore, the first winding needle can directly clamp the cell membrane without first correcting the position of the cell membrane, reducing one process and improving processing efficiency.
  • the film cutting mechanism can cut the battery cell film, and these two processes can be carried out at the same time, which further improves the processing efficiency.
  • the turntable rotates 180°. Since the first winding needle and the second winding needle are symmetrical with respect to the center of the main shaft, they are located in the section between the upper and lower membrane guiding mechanisms. The cell membrane also passes through the fulcrum of the second winding needle. Therefore, the second winding needle can directly clamp the battery cell membrane without first correcting the position of the battery cell membrane. One more process is reduced and the processing efficiency is improved again.
  • FIG. 1 is a schematic structural diagram of a lithium battery winding device provided in the prior art
  • Fig. 2 is a schematic diagram of the lithium battery winding device in Fig. 1 in a state of correction and film cutting;
  • FIG. 3 is a schematic diagram of the structure of the lithium battery winding device provided by the present invention.
  • FIG. 4 is a schematic diagram of the state of the turntable in FIG. 3 after being rotated by 180°;
  • FIG. 5 is a schematic diagram of the film cutting state of the lithium battery winding device in FIG. 3;
  • FIG. 6 is a schematic diagram of another implementation structure of the lithium battery winding device provided by the present invention.
  • FIG. 7 is a schematic diagram of another implementation structure of the lithium battery winding device provided by the present invention.
  • the present invention provides a lithium battery winding device, which includes a turntable 10 that rotates around a main shaft, a first winding needle 21 and a second winding needle 22 for clamping and winding the battery cell film 1,
  • the upper film guide mechanism 30 and the lower film guide mechanism 40 for guiding the cell film 1 and the film cutting mechanism 50 for cutting the cell film 1 are used.
  • the lower film guide mechanism 40 is arranged on the turntable 10 and rotates with the turntable 10.
  • the upper film guiding mechanism 30 and the film cutting mechanism 50 are not provided on the turntable 10 and do not rotate synchronously with the turntable 10.
  • the first winding needle 21 and the second winding needle 22 are both rotatably arranged on the turntable 10 via a support shaft, and are symmetrical with respect to the center of the main shaft.
  • the cell film 1 guided by the upper film guide mechanism 30 and the lower film guide mechanism 40, the section between the upper film guide mechanism 30 and the lower film guide mechanism 40 passes through the first winding needle 21 or the second winding needle 22
  • the fulcrum; among them, the main shaft and the fulcrum are parallel to each other.
  • both the main shaft and the supporting shaft in this article are geometric virtual shafts.
  • the diameter of the virtual shaft can be defined as the width of the winding needle opening, which is set for the convenience of describing the working principle. If the cell membrane 1 passes through the rotation center of the winding needle, that is, the fulcrum, then the rotation angle of the winding needle can be adjusted to clamp the cell membrane 1.
  • a section of the cell film 1 between the upper film guide mechanism 30 and the lower film guide mechanism 40 is in a vertical state, and the opening of the first winding needle 21 is also vertical.
  • the second winding needle 22 first winds the cell film 1.
  • the first winding needle 21 can directly clamp the battery cell membrane 1 without first correcting the position of the battery cell membrane 1, which reduces one process and improves the processing efficiency.
  • the film cutting mechanism 50 can cut the cell membrane 1, and these two processes can be performed at the same time to further improve the processing efficiency.
  • the turntable 10 rotates 180°. Since the first winding needle 21 and the second winding needle 22 are symmetrical with respect to the center of the main shaft, a section of the cell membrane 1 located between the upper film guide mechanism 30 and the lower film guide mechanism 40 also passes through the support of the second winding needle 22. axis. Therefore, the second winding needle 22 can directly clamp the battery cell film 1 without first correcting the position of the battery cell film 1, and one more process is reduced, which again improves the processing efficiency.
  • the lithium battery winding device of the present application can greatly reduce the number of processes through a reasonable layout, and can at least increase the winding efficiency by more than twice, which brings the lithium battery processing to a new level and has a broad application prospect.
  • the lower film guide mechanism 40 includes two lower film guide parts 41, and the two lower film guide parts 41 are both arranged on the turntable 10 and are symmetrical with respect to the center of the main shaft. After the turntable 10 is rotated by 180°, the two lower film guide portions 41 exchange positions to ensure that the state of the battery cell film 1 remains unchanged.
  • the two lower film guide portions 41 can be rotatably arranged on the turntable 10 or fixed on the turntable 10.
  • the two lower film guide portions 41 are both passing rollers.
  • the passing roller is rotatably arranged on the turntable 10 to make the cell membrane 1 move more smoothly.
  • the number of the lower guide film portions 41 can also be more than two, such as four, eight, etc., which is more practically necessary to be set.
  • the cell membrane 1 may not be vertical.
  • the included angle between the battery cell membrane 1 and the horizontal direction is between 0° and 180°.
  • the included angle between the battery cell membrane 1 and the horizontal direction is 78°.
  • the number of the lower film guide portion 41 is four.
  • the included angle between the battery cell membrane 1 and the horizontal direction is 103°.
  • the number of the lower film guide portion 41 is four. The specific angle should be calculated based on the diameter of the winding needle and the length of the cell.
  • the upper film guiding mechanism 30 includes an upper film guiding portion 31, and the outer tangent line of the upper film guiding portion 31 and the lower film guiding portion 41 passes through the fulcrum. In this way, a section of the cell film 1 guided by the upper film guide portion 31 and the lower film guide portion 41 passes through the fulcrum of the first winding needle 21.
  • the lower film guide 41 is also an over roller, which can be installed in rotation or in a fixed manner, and can be set according to actual needs.
  • the film cutting mechanism 50 includes a film cutting power part, a cutter head 51 and a pressing wheel 52, and the pressing wheel 52 is drivingly connected with the film cutting power part.
  • the film cutting power unit drives the pressing wheel 52 to extend and abut the lower film guide 41 to press the cell film 1.
  • the cutter head 51 is in transmission connection with the film cutting power part, and the film cutting power part drives the cutter head 51 to extend and cut a section between the upper film guiding part 31 and the lower film guiding part 41.
  • the cutter head 51 is a thermal cutter head 51. Specifically, the cutter head 51 cuts the battery cell film 1 between the winding needle and the lower film guide portion 41.
  • the lower membrane guiding mechanism 40 further includes two top blocks 42 that cooperate with the cutter head 51.
  • the two top blocks 42 are both arranged on the turntable 10 and are symmetrical with respect to the center of the spindle.
  • the two lower film guide portions 41 are respectively arranged on the two top blocks 42. It can be installed either by rotating or fixed, and it can be set according to actual needs.
  • the lithium battery winding device has a base, the turntable 10 is rotatably arranged on the base, and the upper film guiding mechanism 30 and the film cutting mechanism 50 can be arranged on the base.
  • the upper film guiding mechanism 30 also includes a bracket, which is mounted on the base, and the upper film guiding portion 31 is rotatably mounted on the bracket.
  • the lithium battery winding device further includes a first power unit, a second power and a third power
  • the first winding needle 21 is drivingly connected with the first power unit.
  • the first power unit is arranged on the turntable 10 and can drive the first winding needle 21 to rotate around the supporting shaft, and can drive the first winding needle 21 to move up and down along the supporting shaft.
  • the second winding needle 22 is in transmission connection with the second power part.
  • the second power part is also arranged on the turntable 10 to drive the second winding needle 22 to rotate around the supporting shaft and to drive the second winding needle 22 to rise and fall along the supporting shaft.
  • the turntable 10 is in transmission connection with a third power part.
  • the third power part is arranged on the base and can drive the turntable 10 to rotate around the main shaft.
  • the first winding needle 21 and the second winding needle 22 revolve around the main shaft.
  • the reason for driving the first winding needle 21 and the second winding needle 22 to move up and down along the supporting shaft is to avoid affecting the movement of the cell membrane 1 and to facilitate clamping of the cell membrane 1 at the same time.
  • the second winding needle 22 is winding the electric core film 1
  • the first winding needle 21 is in a contracted state
  • the electric core film 1 is located along the fulcrum of the first winding needle 21.
  • the opening of the first winding needle 21 is just aligned with the cell membrane 1 (refer to Figure 3).
  • the film cutting power unit drives the pressing wheel 52 to extend and abut the lower film guide 41 to press the battery cell film 1. Then, the cutter head 51 is driven to extend, and with the cooperation of the top block 42, the cell membrane 1 is cut off. After cutting, the blade 51 retracts. The pressing wheel 52 can continue to keep pressing the cell membrane 1 until the second winding needle 22 is completely wound (refer to FIG. 5). After winding, the second winding needle 22 retracts.
  • the first power part drives the first winding needle 21 to extend along the fulcrum, so that the cell membrane 1 is located in the opening, and then the cell membrane 1 is clamped.
  • the third power unit drives the turntable 10 to rotate 180°, and then the film cutting mechanism 50 performs cutting.
  • first winding needle 21, the second winding needle 22, the power unit, etc. are common structures known to those skilled in the art, and the specific structures are not described here.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Secondary Cells (AREA)

Abstract

L'invention concerne un appareil d'enroulement de batterie au lithium, comprenant un disque rotatif (10) tournant autour d'un arbre principal, une première aiguille d'enroulement (21) et une seconde aiguille d'enroulement (22) pour serrer et enrouler une membrane de noyau de batterie (1), un mécanisme supérieur (30) de guidage de membrane et un mécanisme inférieur (40) de guidage de membrane utilisés pour guider la membrane de noyau de batterie (1) et un mécanisme (50) de coupe de membrane utilisé pour couper la membrane de noyau de batterie (1), le mécanisme inférieur (40) de guidage de membrane étant disposé sur le disque rotatif (10) et tournant avec le disque rotatif (10) ; la première aiguille d'enroulement (21) et la seconde aiguille d'enroulement (22) sont toutes deux disposées rotatives sur le disque rotatif (10) au moyen d'un arbre de support et sont symétriques par rapport au centre de l'arbre principal ; après avoir été guidée par le mécanisme supérieur (30) de guidage de membrane et le mécanisme inférieur (40) de guidage de membrane, une section de la membrane de noyau de batterie (1) positionnée entre le mécanisme supérieur (30) de guidage de membrane et le mécanisme inférieur (40) de guidage de membrane passe à travers l'arbre de support de la première aiguille d'enroulement (21) ou de la seconde aiguille d'enroulement (22), l'arbre principal et les arbres de support étant parallèles les uns aux autres. En fonctionnement, il n'est pas nécessaire de corriger d'abord la position de la membrane de noyau de batterie (1), ce qui réduit les processus de travail et augmente l'efficacité de traitement.
PCT/CN2020/073562 2020-01-21 2020-01-21 Appareil d'enroulement de batterie au lithium WO2021146932A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202090000227.5U CN215118983U (zh) 2020-01-21 2020-01-21 一种锂电池卷绕装置
PCT/CN2020/073562 WO2021146932A1 (fr) 2020-01-21 2020-01-21 Appareil d'enroulement de batterie au lithium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2020/073562 WO2021146932A1 (fr) 2020-01-21 2020-01-21 Appareil d'enroulement de batterie au lithium

Publications (1)

Publication Number Publication Date
WO2021146932A1 true WO2021146932A1 (fr) 2021-07-29

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ID=76992765

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/073562 WO2021146932A1 (fr) 2020-01-21 2020-01-21 Appareil d'enroulement de batterie au lithium

Country Status (2)

Country Link
CN (1) CN215118983U (fr)
WO (1) WO2021146932A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201490286U (zh) * 2009-07-13 2010-05-26 深圳市赢合科技有限公司 卷绕装置
CN102089920A (zh) * 2008-04-03 2011-06-08 丰田自动车株式会社 卷绕电极体的制造方法和装置及电极卷绕装置
CN102270772A (zh) * 2010-06-02 2011-12-07 Ckd株式会社 卷绕元件的制造装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102089920A (zh) * 2008-04-03 2011-06-08 丰田自动车株式会社 卷绕电极体的制造方法和装置及电极卷绕装置
CN201490286U (zh) * 2009-07-13 2010-05-26 深圳市赢合科技有限公司 卷绕装置
CN102270772A (zh) * 2010-06-02 2011-12-07 Ckd株式会社 卷绕元件的制造装置

Also Published As

Publication number Publication date
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