WO2022114230A1 - Dispositif de fabrication d'électrode de batterie - Google Patents

Dispositif de fabrication d'électrode de batterie Download PDF

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Publication number
WO2022114230A1
WO2022114230A1 PCT/JP2021/043937 JP2021043937W WO2022114230A1 WO 2022114230 A1 WO2022114230 A1 WO 2022114230A1 JP 2021043937 W JP2021043937 W JP 2021043937W WO 2022114230 A1 WO2022114230 A1 WO 2022114230A1
Authority
WO
WIPO (PCT)
Prior art keywords
current collector
active material
band
chamber
frame body
Prior art date
Application number
PCT/JP2021/043937
Other languages
English (en)
Japanese (ja)
Inventor
堀江英明
榎健一郎
中嶋勇輔
Original Assignee
Ａｐｂ株式会社
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
Priority claimed from JP2020199065A external-priority patent/JP7220860B6/ja
Priority claimed from JP2020201224A external-priority patent/JP2022089019A/ja
Application filed by Ａｐｂ株式会社 filed Critical Ａｐｂ株式会社
Publication of WO2022114230A1 publication Critical patent/WO2022114230A1/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
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/139—Processes of 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

Definitions

  • an active material layer containing air may be formed on the current collector. Then, when the active material layer formed on the current collector is compressed in the atmosphere, the compressed air is compressed with the air remaining in the active material, so that the compressed air expands. Problems such as the active material popping off and the surface of the active material becoming uneven may occur.
  • the electrodes used in a lithium-ion battery exhibit stable battery performance by uniformly forming an active material layer containing the active material supplied on the current collector, but in the conventional configuration, the above-mentioned problems are exhibited. It is difficult to suppress the above, and there is a possibility that the desired battery performance cannot be obtained.
  • the device for manufacturing a battery electrode according to the present invention includes a chamber in which the inside is depressurized from atmospheric pressure, and a transport device for transporting a band-shaped current collector in the chamber in the longitudinal direction of the band-shaped current collector.
  • An active material supply device arranged in the chamber and supplying a powdery active material on the band-shaped current collector moving in the chamber, and an active material supply device arranged in the chamber and the band-shaped current collector.
  • the active material supply device is provided with a roll press for fixing the active material on the body to the band-shaped current collector, and the active material supply device is opened and closed to supply the active material onto the band-shaped current collector.
  • a shutter unit for adjustment is provided.
  • each device used in the above-mentioned battery manufacturing method is provided in a chamber in which the pressure is reduced from the atmospheric pressure.
  • the active material can be placed and pressed on the band-shaped current collector under a reduced pressure environment. Therefore, the active material can be placed on the band-shaped current collector without leaving air in the active material before pressing, and the active material can be fixed on the band-shaped current collector.
  • the active material supply device is provided with a shutter unit that adjusts the supply of the active material onto the band-shaped current collector by opening and closing. This makes it possible to precisely control the amount of active material placed on the band-shaped current collector.
  • the exterior body 12 seals the power generation element 11 inside in order to prevent external impact and environmental deterioration.
  • the exterior body 12 is formed in a bag shape by, for example, a laminated film.
  • a metal can case or the like may be used.
  • the power generation element 11 has a plurality of single cells 20 having a positive electrode layer provided on one side of one resin current collector and a negative electrode layer provided on the other side of the resin current collector via an electrolyte layer. It may be a laminated battery.
  • the separator 40 is arranged between the positive electrode 30a and the negative electrode 30b.
  • the plurality of single cells 20 are laminated with the positive electrode 30a and the negative electrode 30b oriented in the same direction.
  • the positive electrode tab 34a comes into contact with the positive electrode 30a of the single cell 20 arranged at the end on the positive electrode side in the stacking direction, and the negative electrode of the single cell 20 arranged at the end on the negative electrode side in the stacking direction.
  • the negative electrode tab 34b comes into contact with 30b.
  • a manufacturing device (manufacturing device for battery electrodes) 1000 will be described as a manufacturing device for the electrode 30.
  • the manufacturing apparatus 1000 includes a chamber 100, a transfer device 200, an active material supply device 300, a roll press 400, a frame supply device 500, a current collector deployment device 600, and an inlet portion. It is equipped with 700.
  • the transport device 200 transports the band-shaped current collector 31B in the chamber 100 in the longitudinal direction of the band-shaped current collector 31B.
  • the first transfer device 210 is provided on the upstream side of the roll press 400 and the second transfer device 220 is provided on the downstream side in the transfer direction of the band-shaped current collector 31B.
  • the first transfer device 210 and the second transfer device 220 are, for example, known belt conveyors.
  • An active material supply device 300 is provided on the first transfer device 210.
  • a frame supply device 500 is provided on the second transfer device 220.
  • the first transfer device 210 and the second transfer device 220 may be collectively referred to as a transfer device 200.
  • the charging chute 320 transports the active material 32c transported from the screw conveyor 310 to the crusher 330.
  • the other end of the screw conveyor 310 is connected to one side surface of the charging chute 320.
  • the upper surface of the crusher 330 is connected to the lower surface of the charging chute 320.
  • the crusher 330 includes a discharge chute 331, a rotor 332, and a screen 333.
  • the discharge chute 331 is a container that receives the active material 32c charged from the charging chute 320.
  • the lower end portion of the discharge chute 331 is open and is arranged in the chamber 100.
  • the active material 32c is placed on the band-shaped current collector 31B in the depressurized chamber 100.
  • the steps of placing the active material 32c and press molding are performed inside the chamber 100 under reduced pressure as described above. This makes it possible to perform the above-mentioned work without leaving air in the active material 32c.
  • the active material 32c that has been transferred from the first transfer device 210 to the roll press 400 and press-molded is transferred to the second transfer device 220.
  • the support 510 includes a base 511 and a gripping arm 512.
  • the base 511 is installed on a sliding portion 532 (described later) of the follow-up rail 530.
  • the gripping arm 512 is connected to the base 511.
  • the gripping arm 512 is a portion for gripping the frame body 45.
  • the gripping arm 512 can be moved up and down by the base 511.
  • a method of gripping the frame body 45 by the gripping arm 512 for example, a method of sucking the frame body 45 to the tip end portion of the gripping arm 512 by the suction portion 513 is preferably used.
  • the supply of the band-shaped current collector 31B to the chamber 100 in the normal state is from the current collector roll 31R held downward by the roll holding portion 610.
  • the end of the lower current collector roll 31R and the start end of the upper current collector roll 31R are joined by the splicer 620.
  • the supply of the current collector roll 31R to the chamber 100 is switched so as to be supplied from the upper collector roll 31R.
  • the entrance portion 700 is provided on the side wall of the chamber 100 in accordance with the position of the slit 110.
  • the inlet portion 700 is a portion where the band-shaped current collector 31B enters the chamber 100.
  • the inlet portion 700 is provided with a slit guide (not shown) that prevents the atmosphere outside the chamber 100 from entering the chamber 100 at the same time when the band-shaped current collector 31B enters the chamber 100. There is. As a result, the band-shaped current collector 31B is supplied into the chamber 100 while maintaining the air pressure in the decompressed chamber 100.
  • the frame body 45 can be installed without stopping the transportation of the band-shaped current collector 31B one by one. Therefore, the time required for manufacturing can be further shortened.
  • a supply device for the band-shaped current collector 31B is provided outside the chamber 100. This makes it possible to minimize the size of the chamber 100.
  • the frame supply device is provided in the chamber, and the support for moving the frame in the vertical direction is moved in the second direction intersecting the first direction by the moving rail. Since the frame body can be moved in this way and the frame body can be installed on the current collector conveyed in the first direction, the frame body can be smoothly supplied. In addition, the support is moved by the moving rail. As a result, the structure can be further simplified as compared with, for example, a robot arm or the like.
  • a follow-up rail for moving the support in the first direction may be further provided.
  • the support is attached to the frame.
  • the frame is gripped so as to be gripped.
  • the frame body is supplied onto the current collector so that the active material layer formed on the current collector is housed inside the frame body. That is, the frame is supplied around the active material in which an appropriate amount is placed in advance. Therefore, by storing an appropriate amount of the active material in the frame, the active material can be arranged without a gap on the inner surface of the frame.
  • the device for manufacturing the battery electrode according to this embodiment is arranged in the chamber, the chamber in which the pressure is reduced below the atmospheric pressure, the transport device for transporting the current collector in the chamber, and the inside of the chamber.
  • a support that holds the frame body detachably and moves the frame body in the vertical direction, and a moving rail that moves the support tool in the second direction that intersects the first direction in the horizontal direction.
  • a frame body supply device including the above, and an active material supply device for supplying a powdery active material on the current collector conveyed by the transfer device.
  • the active material supply device is arranged in the chamber and downstream of the frame supply device in the transport direction, and the active material supply device is placed on the current collector frame.
  • a powdery active material may be supplied to the inside of the body.
  • the moving directions of the support 510 are the X direction (first direction), the Y direction (second direction), and the Z direction (vertical direction) shown in FIG.
  • the X direction is the longitudinal direction of the follow rail 530.
  • the X direction is parallel to the direction in which the band-shaped current collector 31B is transported by the transport device 200.
  • the Y direction is the longitudinal direction of the moving rail 520, which is the horizontal direction orthogonal to the X direction.
  • the adsorption unit 513 is provided with a degassing tube 514.
  • the suction portion 513 includes, for example, a main body portion 513a, an elastic portion 513b, and a suction cup portion 513c.
  • the main body portion 513a is a portion that is the basis of the suction portion 513.
  • the main body portion 513a is a member having a U-shaped cross section having an opening on the lower surface side. Further, the opening of the main body portion 513a has a frame shape (annular shape) that matches the shape of the frame body 45.
  • the elastic portion 513b is provided so as to close the opening of the main body portion 513a.
  • the elastic portion 513b is a portion provided on the main body portion 513a and in contact with the frame body 45. Here, in order to attract the frame body 45 to the suction portion 513, the elastic portion 513b needs to be in close contact with the frame body 45 without a gap.
  • the suction cup portion 513c is a portion of the elastic portion 513b provided with a plurality of intervals on the surface in contact with the frame body 45, and the thickness of the elastic portion 513b is thin. Further, in the present embodiment, the suction cup portion 513c is provided so as to be flush with the surface of the elastic portion 513b on the side in contact with the frame body 45 and to have a recess on the surface on the side of the main body portion 513a.
  • the frame body 45 is gripped by the suction unit 513 as follows.
  • the gap created between the frame body 45 and the suction cup portion 513c becomes a negative pressure.
  • the frame body 45 is sucked by the suction cup portion 513c of the suction portion 513, and the frame body 45 is gripped by maintaining this. Further, when the frame body 45 is released, the suction by the degassing tube 514 is stopped, so that the frame body 45 can be gripped freely.
  • the frame transport mechanism is provided before coating the active material 32c on the outside of the chamber 100 (decompression chamber) (that is, under normal pressure environment) (that is, on the upstream side in the transport direction)
  • the frame Since 45 enters the chamber 100 (decompression chamber) through the slit 110 of the chamber 100 (decompression chamber)
  • the width (thickness) of the slit 110 becomes large, and as a result, the inflow amount of outside air increases. Occurs.
  • the frame transfer mechanism is provided on the outside of the chamber 100 (decompression chamber) (that is, under normal pressure environment) and after pressing (that is, on the downstream side in the transfer direction).
  • the active material 32c applied without the frame 45 is pressed, and then the frame 45 is pressed from above the pressed electrode active material layer 32 after being discharged to the outside of the chamber 100 (under normal pressure environment). Will be placed. In that case, there arises a problem that the electrode active material layer 32 pressed without the frame body 45 does not fit to the end of the frame body 45.
  • the above problems can be solved by performing the supply of the frame body 45 in the chamber 100 (decompression chamber) in which the pressure is reduced from the atmospheric pressure as in the present embodiment, and as a result, the lithium ion battery.
  • the productivity of the electrodes can be improved.
  • the support 510 is moved by the moving rail 520.
  • the structure can be further simplified as compared with, for example, a robot arm or the like.
  • a frame supply device 500 is provided in the chamber 100.
  • the battery manufacturing process that is, the installation of the frame body 45 on the band-shaped current collector 31B is performed in the chamber 100 whose inside is depressurized.
  • the frame body supply device 500 is provided in the chamber 100, the frame body 45 can be installed in the band-shaped current collector 31B in the chamber 100. Therefore, the ideal battery manufacturing process can be realized.

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

Abstract

L'invention concerne un dispositif de fabrication pour une électrode de batterie, et un procédé de fabrication associé, qui permettent de supprimer l'inclusion d'air dans une couche de matériau actif et d'améliorer l'uniformité de la couche de matériau actif qui est formée sur un collecteur de courant.　Un dispositif de fabrication 1000 comprend : une chambre 100 dont l'intérieur est dépressurisé à un niveau inférieur à la pression atmosphérique ; un dispositif de transport 200 qui transporte, à l'intérieur de la chambre 100, un collecteur de courant en forme de bande 31B dans la direction longitudinale du collecteur de courant 31B en forme de bande ; un dispositif d'alimentation 300 en matériau actif qui fournit un matériau actif 32C de type poudre sur le collecteur de courant 31B en forme de bande qui se déplace à l'intérieur de la chambre 100 ; et une presse à rouleaux 400 qui fixe le matériau actif 32C sur le collecteur de courant en forme de bande au collecteur de courant 31B en forme de bande. Le dispositif d'alimentation 300 en matériau actif et la presse à rouleaux 400 sont disposés à l'intérieur de la chambre 100. Le dispositif d'alimentation 300 en matériau actif est pourvu d'une unité d'obturation 350 qui s'ouvre et se ferme de façon à ajuster l'alimentation en matériau actif 32C sur le collecteur de courant 31B en forme de bande.
PCT/JP2021/043937 2020-11-30 2021-11-30 Dispositif de fabrication d'électrode de batterie WO2022114230A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2020-199065 2020-11-30
JP2020199065A JP7220860B6 (ja) 2020-11-30 2020-11-30 電池用電極の製造装置
JP2020201224A JP2022089019A (ja) 2020-12-03 2020-12-03 枠体供給装置及び電池用電極の製造装置
JP2020-201224 2020-12-03

Publications (1)

Publication Number Publication Date
WO2022114230A1 true WO2022114230A1 (fr) 2022-06-02

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Application Number Title Priority Date Filing Date
PCT/JP2021/043937 WO2022114230A1 (fr) 2020-11-30 2021-11-30 Dispositif de fabrication d'électrode de batterie

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WO (1) WO2022114230A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010033918A (ja) * 2008-07-30 2010-02-12 Idemitsu Kosan Co Ltd リチウム電池の製造方法、及びそれより得られるリチウム電池
JP2015185509A (ja) * 2014-03-26 2015-10-22 株式会社日立製作所 リチウムイオン二次電池用負極の製造方法及び製造装置並びにリチウムイオン二次電池用負極及びリチウムイオン二次電池
JP2015207523A (ja) * 2014-04-23 2015-11-19 株式会社日立ハイテクノロジーズ リチウムイオン二次電池の電極板の製造方法および製造装置
JP2016115578A (ja) * 2014-12-16 2016-06-23 トヨタ自動車株式会社 電極製造方法及び電極製造装置
CN110828781A (zh) * 2019-11-14 2020-02-21 中国科学院过程工程研究所 一种正极板及其制备方法和用途

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010033918A (ja) * 2008-07-30 2010-02-12 Idemitsu Kosan Co Ltd リチウム電池の製造方法、及びそれより得られるリチウム電池
JP2015185509A (ja) * 2014-03-26 2015-10-22 株式会社日立製作所 リチウムイオン二次電池用負極の製造方法及び製造装置並びにリチウムイオン二次電池用負極及びリチウムイオン二次電池
JP2015207523A (ja) * 2014-04-23 2015-11-19 株式会社日立ハイテクノロジーズ リチウムイオン二次電池の電極板の製造方法および製造装置
JP2016115578A (ja) * 2014-12-16 2016-06-23 トヨタ自動車株式会社 電極製造方法及び電極製造装置
CN110828781A (zh) * 2019-11-14 2020-02-21 中国科学院过程工程研究所 一种正极板及其制备方法和用途

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