WO1997034329A1 - Procede et dispositif de collage de feuilles de lithium et procede de fabrication d'electrodes de lithium - Google Patents

Procede et dispositif de collage de feuilles de lithium et procede de fabrication d'electrodes de lithium Download PDF

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Publication number
WO1997034329A1
WO1997034329A1 PCT/JP1997/000816 JP9700816W WO9734329A1 WO 1997034329 A1 WO1997034329 A1 WO 1997034329A1 JP 9700816 W JP9700816 W JP 9700816W WO 9734329 A1 WO9734329 A1 WO 9734329A1
Authority
WO
WIPO (PCT)
Prior art keywords
lithium foil
lithium
attaching
electrode plate
foil
Prior art date
Application number
PCT/JP1997/000816
Other languages
English (en)
Japanese (ja)
Inventor
Hiroyuki Nishida
Koji Tonohara
Original Assignee
Fuji Photo Film Co., Ltd.
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 JP5801696A external-priority patent/JPH09251852A/ja
Priority claimed from JP8176596A external-priority patent/JP4026183B2/ja
Application filed by Fuji Photo Film Co., Ltd. filed Critical Fuji Photo Film Co., Ltd.
Priority to AU19409/97A priority Critical patent/AU1940997A/en
Publication of WO1997034329A1 publication Critical patent/WO1997034329A1/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
    • H01M4/06—Electrodes for primary cells
    • H01M4/08—Processes of manufacture
    • H01M4/12—Processes of manufacture of consumable metal or alloy electrodes

Definitions

  • TECHNICAL FIELD The method of attaching a lithium foil, an attaching device, and a method of manufacturing a lithium electrode
  • the present invention relates to a method for attaching a lithium foil for attaching strip-shaped lithium foil on an electrode plate at predetermined intervals, an attaching apparatus, and a method for manufacturing a lithium electrode.
  • lithium batteries incorporating lithium electrodes as battery electrodes have been employed in various applications.
  • This lithium electrode is usually manufactured by cutting a long hoop-shaped or sheet-shaped lithium foil into desired cut portions, and then fixing the strip-shaped lithium foil to the current collector surface.
  • Conventional Example 1 a manufacturing method disclosed in, for example, Japanese Patent Application Laid-Open No. 6-124709 (hereinafter referred to as Conventional Example 1) is known. ing.
  • Conventional Example 1 a series of metal lithium foils (or lithium alloy foils) arranged on a series of resin films were cut (or cut) into a predetermined size so that the metal lithium foil surface was applied to the negative electrode current collector surface. It describes that the metal lithium foil is transferred to the surface of the negative electrode current collector by pressing the resin film surface while contacting the resin film surface.
  • a series of metal lithium foils (or lithium alloy foils) is cut into predetermined dimensions.
  • a method for manufacturing a negative electrode current collector is known.
  • the lithium foil is considerably thin, on the order of several tens of / zm, if the lithium foil is directly pulled out and intermittently fed out from the feed shaft, the lithium foil is damaged or wrinkles are formed on the lithium foil. There is a problem that various adverse effects such as rubbing occur. Further, in the above-described conventional example 2, the same problem as in the above-described conventional example 1 occurs, and the control when transferring the lithium foil from the resin film to the transfer device becomes complicated. There is a problem that transfer becomes extremely unstable.
  • the electrode material-coated portion and the non-coated portion are provided alternately on both sides of the current collector, respectively, and are detected via detection mechanisms provided on both sides of the current collector, respectively.
  • Each application boundary portion is detected, and strip-shaped lithium foil is attached to both surfaces based on the detection result.
  • the starting positions of the strip-shaped lithium foils are different on both sides of the current collector, and the driving information of the transport mechanism, for example, the number of pulses of the servo motor is counted, and each corresponds to the predetermined moving distance.
  • the first and second attaching mechanisms disposed on the respective surface sides of the current collector are individually driven.
  • the sticking timing of the strip-shaped lithium foil tends to be different on both sides of the current collector, and when the strip-shaped lithium foil is stuck on one side of the current collector, In some cases, the application of the strip-shaped lithium foil on the other side of the current collector does not start.
  • this NG information may not be accurately sent to the second sticking mechanism side.
  • the second attaching mechanism sets If they correspond to each other (intermediate position), it is difficult to detect which NG information of the first attaching mechanism corresponds to the second attaching mechanism, and to what number the attaching part. Because it becomes. As a result, there is a problem that the entire control including NG information and data shift becomes considerably complicated.
  • the second attaching mechanism is in the process of attaching at the time when the attaching processing of the strip-shaped rechargeable foil by the first attaching mechanism is completed, for example, the drive source, ie, the servomotor, is used for the first attaching.
  • the drive source ie, the servomotor
  • the attaching position of the second attaching mechanism is easily changed by the rising speed.
  • the position where the strip-shaped lithium foil is attached to both sides of the current collector fluctuates, and there is a problem that a highly accurate attachment process is not performed.
  • Japanese Unexamined Patent Publication No. Hei 7-136978 discloses that a liquid absorbing material impregnated with an organic solvent is brought into contact with the first blade or the second blade so as to wet the side surfaces of the first blade or the second blade, and that the lithium foil is transferred.
  • the cutting device is shown with an injection device for injecting a gas that does not react with lithium on the original side surface.
  • propylene carbonate solution is used as an organic solvent, and this propylene carbonate solution adheres to the lithium foil from the first blade or the second blade during cutting and is mixed into the battery. Easy to do. As a result, it has been pointed out that the propylene carbonate liquid mixed in the battery significantly reduces the battery performance.
  • the handling of the lithium foil is simplified without using a support such as a resin film, and the lithium foil can be easily and accurately transferred to the electrode plate with an arbitrary pitch. It is an object of the present invention to provide a method of attaching a lithium foil, an attaching device, and a method of manufacturing a lithium electrode, which are capable of performing the method.
  • the lithium foil is intermittently applied to the processing means by winding the interleaving paper wound integrally with the lithium foil in a state where a constant tension is applied to the long lithium foil.
  • the lithium foil is smoothly fed out under a constant tension without being affected by tension fluctuation due to rewinding. Therefore, the lithium foil can be reliably sent out to the processing means in a normal state without any failure such as breakage or wrinkles occurring in the lithium foil.
  • the present invention intermittently rotates a transfer roller holding a lithium foil, which is at least partially cut, on a peripheral surface on one surface side of a continuously transported long electrode plate,
  • the lithium foil is partially brought into close contact with the electrode plate by pressing the nip roller from the other surface of the electrode plate in synchronization with the transfer port roller.
  • the rotation of the transfer roller is stopped, and the nip effect due to the peripheral speed of the nib roller is released. It is stuck on the electrode plate as a foil.
  • a long lithium foil is adsorbed and conveyed in the longitudinal direction thereof, and intermittent openings, for example, intermittent holes are formed along the cut portion of the lithium foil in synchronization with the conveyance. Is provided, the end of the lithium foil is sucked and conveyed from the cutting portion by a larger feed amount than the portion on the side of the conveyance improving flow. As a result, the lithium foil has a difference in feed amount before and after the cutting portion, and is easily and reliably cut along the cutting portion provided with the intermittent hole. Next, the cut lithium foil is adhered to the electrode plate while maintaining the interval set by the difference in the feeding amount at the separation position.
  • a strip-shaped lithium foil is stuck on one surface of a long electrode plate via a first sticking mechanism at predetermined intervals, and a second sheet of lithium electrode is stuck on the other surface of this electrode plate.
  • the blade member when the blade member advances and retreats under the action of the actuator to process the lithium foil, the blade member advances and retreats relative to the stripper member.
  • saturated hydrocarbon is supplied to the brush member provided on the strip bar member as a lithium adhesion preventing agent. Therefore, when the blade member slides on the brush member, saturated hydrocarbon is easily and reliably applied to the blade member.
  • a long electrode plate is transported in the longitudinal direction via an electrode plate transport mechanism, and a strip-shaped lithium foil having a predetermined length is provided on at least one surface of the electrode plate by an attaching mechanism. It is attached at predetermined intervals.
  • the entire lithium foil can be securely adhered to the electrode plate.
  • FIG. 1 is a schematic structural explanatory view of a manufacturing machine for carrying out a method for attaching a lithium foil and a method for manufacturing a lithium electrode according to the present invention.
  • FIG. 2A is an explanatory view of a main part of the attaching device according to the first embodiment of the present invention
  • FIG. 2B is an explanatory view of another embodiment of the main part shown in FIG. 2A.
  • FIG. 3 is a schematic front explanatory view of the attaching device.
  • FIG. 4 is an explanatory longitudinal sectional view of a transfer roller and a cutting roller constituting the attaching device.
  • 5A to 5D are timing charts of the attaching method.
  • FIG. 6 is an explanatory view showing a state in which the sticking device is at the origin.
  • FIG. 7 is an explanatory diagram showing a perforated state of the attaching device.
  • FIG. 8 is an explanatory view showing a state of application of the application device.
  • FIG. 9 is an explanatory diagram showing a detached state of the attaching device.
  • FIG. 10 is a cross-sectional view of a lithium battery incorporating a lithium electrode manufactured by the method of the present invention.
  • FIG. 11 is an explanatory view of a main part of a sticking device according to a second embodiment of the present invention.
  • FIG. 12 is an explanatory view of a main part of an attaching device according to a third embodiment of the present invention.
  • FIG. 13 is a schematic front explanatory view of a sticking device according to a fourth embodiment of the present invention.
  • FIG. 14 is an explanatory longitudinal sectional view of a second suction roll constituting the attaching device.
  • FIG. 15 is an explanatory diagram of a configuration of a drive system of the attaching device.
  • FIG. 16H to FIG. 16D are timing charts of the attaching method according to the fourth embodiment.
  • FIG. 17A to FIG. 17D are timing charts when the sticking pitch is changed.
  • FIG. 18 is an explanatory diagram of a configuration of a drive system of the attaching device according to the fifth embodiment of the present invention.
  • FIG. 19 is an explanatory diagram of a processing mechanism that constitutes the attaching device according to the sixth embodiment of the present invention.
  • FIG. 20 is a schematic explanatory diagram of the configuration of the attaching device according to the present invention.
  • FIG. 21 is a circuit diagram of the attaching device.
  • FIG. 22 is a perspective explanatory view of a processing mechanism constituting the attaching device.
  • FIG. 23 is an explanatory longitudinal sectional view of the processing mechanism.
  • FIG. 24 is an explanatory plan view of the processing mechanism.
  • FIG. 25 is an explanatory diagram of the operation of the sticking device.
  • FIG. 26 is a perspective explanatory view of a pressing mechanism constituting the attaching device.
  • FIG. 27 is an explanatory side view of the pressing mechanism.
  • FIG. 28A is an explanatory view when the strip bar member constituting the processing mechanism holds a lithium foil.
  • FIG. 28B shows the processing of the lithium foil by a blade member constituting the processing mechanism.
  • FIG. 28C is an explanatory diagram when the blade member is separated from the lithium foil.
  • FIG. 1 is a schematic configuration diagram of a lithium foil sticking apparatus 10 according to a first embodiment of the present invention.
  • the sticking device 10 winds a long electrode plate 12 on which an active material is intermittently applied on a hoop-shaped copper foil support at regular intervals, and sends it out at a constant torque by a torque motor (not shown).
  • a first attaching mechanism 20 for attaching a lithium foil 18 to the one surface 12a of 12 at a predetermined cutting pitch and an attaching pitch, and the lithium foil 18 on the other surface 12b of the electrode plate 12.
  • a plurality of pass rollers 28 are provided, and a long lithium foil 18 is wound around the lithium foil.
  • a plurality of pass rollers 32 are arranged between the feed shaft 30 and the first and second attaching mechanisms 20 and 22.
  • An interleaf take-up shaft 34 is provided adjacent to the lithium foil feed shaft 30.
  • the interleaf take-up shaft 34 is rotated in the direction of the arrow so that the lithium foil feed shaft 30 has lithium foil 18 attached thereto.
  • the lithium feed shaft 30 and the interleaf take-up shaft 34 are arranged in a unit 31.
  • the unit 31 is fed in the direction of feeding lithium foil (in the direction of arrow E). It can move in the direction perpendicular to the direction (the direction perpendicular to the paper).
  • an EPC edge position controller
  • a head 33 is provided. On the downstream side of the EPC head 33, a constant tension (10 g to 1 g) is applied to the lithium foil 18 that is intermittently fed from the lithium foil feed shaft 30 under the intermittent rotation of the interleaf take-up shaft 34.
  • a dancer roller 35 for giving 0 g) is arranged to be able to move up and down freely. On the side of the dancer roller 35, first and second sensors 37a and 37b for detecting an upper limit position and a lower limit position of the dancer roller 35 are arranged.
  • Separators 24 are made of an insulating material such as polypropylene or polyethylene, and are wound around a separator delivery shaft 38, and a plurality of separators are provided between the separation delivery shaft 38 and the take-up shaft 26. Are provided.
  • the first attaching mechanism 20 includes an electrode transport mechanism 42 having a main feed roller 16 and a winding shaft 26 and continuously transporting the electrode 12 in the longitudinal direction (the direction of arrow A).
  • a transfer roller transfer means that holds the lithium foil 18 (partially cut lithium foil 18a) whose part has been cut and rotates intermittently on one surface 12a of the electrode plate 12
  • a nip roller 46 for pressing the peripheral surface of the transfer roller 44 from the other surface 12 b side of the electrode plate 12 in synchronization with the transfer roller 44.
  • a cutting roller 48 is arranged in parallel with the transfer roller 44, and the peripheral surface of the transfer roller 44 and the peripheral surface of the cutting roller 48 are set to 0.2 mm to 0 mm. Separate at 5 mm intervals.
  • the lithium foil 18 is provided at predetermined intervals in synchronization with the cutting roller 48 at right angles to the direction in which the bracket 18 is transported (in the direction of arrow E).
  • a processing mechanism 50 for intermittently forming an opening, for example, a perforation 18b is provided along the cut portion.
  • the cutting roller 48 includes a fixed inner cylinder 52 and an outer cylinder 5 rotatably disposed around the outer periphery of the inner cylinder 52.
  • the inner cylindrical body 52 communicates with a negative pressure source (not shown) (for example, a ring blower), and has a suction opening 56 opened to the outside by cutting out a lower portion of the inner cylinder 52 within a predetermined angle range.
  • a negative pressure source for example, a ring blower
  • the outer cylinder 54 is press-fitted with a material capable of avoiding adhesion of the lithium foil 18 to the outer periphery, for example, a cylinder 54 made of high molecular weight polyethylene (or high-density polyethylene).
  • a plurality of suction holes 60 are formed penetrating in the diameter direction.
  • the suction holes 60 have a diameter of 5 mm on the open side (small diameter side) and are provided on the entire circumference at intervals L as a cutting pitch in the circumferential direction.
  • a plurality of grooves 62 having a rectangular cross section with a direction of l mm and a depth of 5 mm are formed on the entire circumference at intervals L in the circumferential direction.
  • the processing mechanism 50 includes a support member 64 connected to driving means (not shown) such as a cylinder and capable of moving back and forth in the direction of arrow B.
  • driving means such as a cylinder and capable of moving back and forth in the direction of arrow B.
  • a plurality of needle members 66 are provided on the support member 64 at predetermined intervals in the width direction of the lithium foil 18, and pressing members 68 are provided on both sides of the needle members 66 with springs (not shown). ) Is supported to move forward and backward freely.
  • the needle member 66 is positioned so as to face each groove 62 at the stop position of the cutting roller 48 when the cutting roller 48 is intermittently fed.
  • a high molecular weight polyethylene (or high-density polyethylene) cylinder 70 is press-fitted, and a plurality of holes 72 opened outward from the peripheral surface are formed. Is done.
  • Each of the holes 72 has an open side (small diameter side) having a diameter of 1.5 mm and is arranged around the entire circumference at intervals L in the circumferential direction, and extends in the axial direction of the transfer roller 44.
  • the transfer roller 44 communicates with a passage 74 opened outward from one side of the transfer roller 44.
  • a suction opening (communication means) 76 that communicates the hole 72 arranged immediately before the sticking position S2 where the nip roller 46 slides with the nip roller 46 to a negative pressure generation source (for example, a ring blower) is provided.
  • a side opening of the transfer roller 44 is provided with a profile opening 78 that communicates the hole 72 immediately after passing the sticking position S2 with an air jet blower (not shown). The peripheral surface of the transfer roller 44 is knurled.
  • the transfer roller 44 and the cutting roller 48 are driven by a single servomotor (not shown) or individual servomotors to rotate synchronously in opposite directions (directions of arrows C and D).
  • the transfer row is moved by the cam mechanism 80.
  • the drive is controlled in synchronization with L4.
  • a servomotor or the like can be used instead of the cam mechanism 80.
  • the second attaching mechanism 22 has the same configuration as the first attaching mechanism 20 described above, and the same components are denoted by the same reference characters and will not be described in detail.
  • FIG. 10 shows a lithium battery 82 in which a lithium electrode (negative electrode) 81 manufactured by the attaching device 10 is incorporated.
  • the lithium battery 82 includes a battery can 83 having a cylindrical shape with a bottom, and an electrode plate group 84 enclosed in the battery can 83 together with an electrolytic solution.
  • the electrode plate group 84 is configured by winding a positive electrode 85 and a lithium electrode 81 through a pair of separators 86a and 86b, and a positive electrode lead 8 is connected to an end of the positive electrode 85. While 5 a is provided, a negative electrode lead 81 a is provided at an end of the lithium electrode 81.
  • the positive electrode lead 85 a extends from the winding center side of the electrode plate group 84 to the opening 83 a side of the battery can 83, and is welded to the sealing part 87.
  • the negative electrode lead 81a extends from the outer periphery of the electrode group 84 to the inner bottom 83b of the battery can 83 and is welded to the inner bottom 83b.
  • a hoop-shaped electrode plate 12 is wound around a feed shaft 14, and a lithium metal feed shaft 30 is made of a thin metal having adhesiveness to metal.
  • a hoop-shaped lithium foil 18 as a foil is wound in a state of being superimposed on an interleaf 36 formed of an insulating material such as polyethylene or polyethylene.
  • the separation shaft 38 is wound around a hoop-shaped separation shaft 24 times. Then, the feed shaft 14 is reversely rotated by a torque motor (not shown) to apply a constant torque to the electrode plate 12, and the electrode plate 12 is conveyed by the main feed roller 16 via the pass roller 28.
  • the main feed roller 16 constitutes a suction drum, and sucks the electrode plate 12 through a drive source such as a servomotor to carry out constant-quantity conveyance. Therefore, the electrode plate 12 is moved at a constant speed V 2 in the direction of arrow A via an electrode plate transport mechanism 42 including a main feed roller 16 and a winding shaft 26 (see FIG. 5D). Is transported at a fixed rate.
  • a predetermined tension for example, 50 g
  • the slip-sheet winding shaft 34 is driven to rotate so that only the slip-sheet 36 is wound.
  • the lithium foil 18 is smoothly fed out of the lithium foil feed shaft 30 under a constant tension by the dancer roller 35 in a state where the tension fluctuation due to rewinding does not act, and the first foil is passed through the pass roller 32. It is sent out to the cutting roller 48 side forming the sticking mechanism 20.
  • the inside of the inner cylindrical body 52 of the cutting roller 48 is sucked under the action of a negative pressure source (not shown), and the cutting roller 48 and the transfer roller 44 are synchronized with the force. (See arrows C and D in Fig. 6). Therefore, the lithium foil 18 is suction-held on the outer peripheral surface of the cutting roller 48 under the suction action of the plurality of suction holes 60 in a state where a predetermined tension is given by the dancer roller 35, and the inner cylinder The area 52 where the suction opening 56 of the body 52 is provided is conveyed by suction.
  • the cutting pitch of the lithium foil 18 is set to the interval L (for example, 4 mm), and the cutting roller 48 is intermittently rotated so that the lithium foil 18 is intermittently conveyed by the interval L. Then, when the cut portion of the lithium foil 18 is stopped at a position corresponding to the processing mechanism 50, the support member 64 is moved under the action of a drive source (not shown) constituting the processing mechanism 50 to form the cutting roller 48. Move to the peripheral side. With this, the pressing member 68 cuts the front and rear of the cutting portion of the lithium foil 18 while pressing the outer peripheral surface of the 16
  • the plurality of needle members 66 enter the grooves 62 to form perforations 18b in the lithium foil 18 (see FIG. 7).
  • the cutting roller 48 and the transfer roller 44 are intermittently rotated in the direction of arrow C and the direction of arrow D in perfect synchronization, respectively, so that the lithium foil 18 with perforations 18b is formed. That is, the partially cut lithium foil 8 a is transferred from the outer peripheral surface of the cutting roller 48 to the outer peripheral surface side of the transfer roller 44.
  • the suction roller portion 56 of the cutting roller 48 is closed at the transfer position S1 of the partially cut lithium foil 18a, while the suction opening 76 of the transfer roller 44 is closed at the transfer position S. Open from one. Therefore, at the same time as the suction of the partially cut lithium foil 18a by the cutting roller 48 is released, the suction of the partially cut lithium foil 18a by the transfer roller 44 is started, and the partially cut lithium foil 1a is started. 8a is smoothly and reliably transferred to the transfer roller 44 side.
  • the nip roller 46 is moved via the cam mechanism 80 to an arrow in FIG.
  • the transfer roller 44 moves in the F direction (the other side 12 b side of the electrode plate 12) in synchronization with the rotation of the transfer roller 44.
  • the nip roller 46 rotates the electrode plate 1 2 at a predetermined nip pressure.
  • the nip by the nip rollers 46 until the area of 1 to 2/5 of the strip area of the partially cut lithium foil 18 a held by suction on the peripheral surface of the transfer roller 44 comes into close contact with the electrode plate 12.
  • the operation is performed.
  • the nip operation is performed until 3/4 (specifically, 3 mm) of the strip width of the partially cut lithium foil 18a is transferred to the electrode plate 12.
  • the nip roller 46 is separated from the electrode plate 12 via the cam mechanism 80, and the rotation of the transfer roller 44 is stopped (see FIG. 9). Therefore, the electrode plate 12 being transported at a constant speed V2 by the transport mechanism 42 and the lithium battery partially adhered to the electrode plate 12 and partially held on the peripheral surface of the transfer roller 44. There is a speed difference between the foil 18a and the partially cut lithium foil 18a. And is reliably transferred to the electrode plate 12 as a strip-shaped lithium foil 18c.
  • the slip sheet wound integrally with the lithium foil 18 is provided in a state where a constant tension is applied to the long lithium foil 18 via the dancer roller 35. Only 36 is taken up by the rotation of the interleaf take-up shaft 34. As a result, the lithium foil 18 is smoothly fed out under a constant tension without a change in tension due to unwinding.
  • the lithium foil 18 does not suffer from defects such as breakage and wrinkles, and the lithium foil 18 can be reliably sent out to the cutting roller 48 in a normal state.
  • first and second sensors 37a and 37b for detecting the upper limit position and the lower limit position of the dancer roller 35 are provided.
  • FIG. 2B other embodiments shown in FIG. 2B can be employed.
  • the dancer roller 35 is rotatably supported at one end of a swingable dancer arm 92 via a fulcrum 90, and a balance weight 94 is fixed to the other end of the dancer arm 92.
  • a proximity linear sensor (position detection sensor) 95 is provided to detect the position of the dancer roller 35 in an analog manner.
  • the output signal of the proximity linear sensor 95 is sent to the amplifier 96, and is input from this amplifier 96 to the motor driver 98 via the isolator 977.
  • the motor driver 98 is connected to a motor (rotation drive source) 99 for driving the interleaf take-up shaft 34 to rotate.
  • the position of the dancer roller 35 is detected in an analog manner via the proximity linear sensor 95, and the drive of the motor 99 is controlled under the action of the motor driver 98 based on this output signal. . Therefore, the position information of the dancer roller 35 is fed back to the rotation speed of the slip sheet take-up shaft 34, so that the dancer roller 35 is always arranged at a fixed position. As a result, the number of times of starting and stopping the motor 99 can be reduced at once, and disturbances due to the inertia of the dancer roller 35 itself can be effectively eliminated. The effect is that the solution can be reliably applied.
  • the first embodiment as shown in FIG.
  • an EPC head 33 is provided in the vicinity of the unit 31, and a lithium foil 18 derived from the unit 31 is provided. Is detected. Then, when the edge position of the lithium foil 18 shifts, the unit 31 moves in a direction orthogonal to the direction of the arrow E via a driving source (not shown), and the edge position of the lithium foil 18 is constantly changed. It can be adjusted to a fixed position.
  • the transfer roller 44 that holds the partially-cut lithium foil 18a by suction is intermittently rotated in the direction of arrow D, and the nip roller 46 is attached to the electrode plate 12 that is being fed at a constant rate.
  • the partially cut lithium foil 18a is pressed through the gap.
  • the partially cut lithium foil 18a is reliably separated from the perforations 18b by the speed difference between the transport speed of the electrode plate 12 and the peripheral speed of the transfer roller 44, and A strip-shaped lithium foil 18c can be attached. Therefore, unlike the conventional case, there is no need to use a support such as a resin film, and the lithium foil 18 can be handled independently, and the effect of being extremely economical can be obtained.
  • the sticking pitch P of the strip-shaped lithium foil 18c to be stuck on the top can be set, for example, from 8.5 mm to 11111111 at 0.5 mm intervals.
  • the nip roller 46 performs the nip operation until the area of 1 Z 2 to 4/5 of the strip area of the partially cut lithium foil 18 a is in close contact with the electrode plate 12. c can be securely attached to the electrode plate 12.
  • the transfer roller 44 has a hole 72 just after passing the sticking position S2.
  • the lower openings 78 communicate with each other. Therefore, by blowing air from the outer peripheral surface of the transfer roller 44 through the blower opening 78 and the hole 72, the strip-shaped lithium foil 18c is more reliably transferred to the pole 12. It becomes possible to do.
  • a knurl is provided on the outer peripheral surface of the transfer roller 44, and the nip pressure by the nip roller 46 is effectively improved. Therefore, the nip roller 46 is not pressed against the transfer roller 44 more than necessary, and it is possible to avoid the occurrence of distortion or the like on the outer peripheral surface of the transfer roller 44.
  • a long lithium foil 18 is directly sucked and held on the peripheral surface of the cutting roller 48, and the needle constituting the processing mechanism 50 while intermittently feeding the lithium foil 18.
  • the member 66 is inserted into the groove 62, and a perforation 18b is provided by so-called aerial cutting. Then, the lithium foil 18 provided with the perforations 18 b (partially cut lithium foil 18 a) is sucked and held on the peripheral surface of the transfer roller 44 and is intermittently transported to the application position S 2. .
  • the handling of the long lithium foil 18 that is transported alone without using the support is simplified, and the desired strip-shaped lithium foil 18 c is continuously provided on the electrode plate 12 at predetermined intervals. Can be pasted.
  • the equipment cost is effectively reduced, and the size and simplification of the entire first attaching mechanism 20 are easily achieved.
  • the electrode plate 12 on which the strip-shaped lithium foil 18c is adhered to the one surface 12a by the first attaching mechanism 20 is fixedly transported in the direction of arrow A as shown in FIG.
  • the sticking operation of the strip-shaped lithium foil 18 is performed on the other side 12 b via the second sticking mechanism 22.
  • the electrode plate 1 2 with the strip-shaped lithium foil 18 c transferred to both surfaces 1 2 a and 1 2 b is superimposed on the separation electrode 2 sent out from the separator feeding shaft 38 as the lithium electrode 81. In this state, it is wound up on the winding shaft 26.
  • the wound lithium electrode 81 is transferred to the battery assembling process and wound around the positive electrode 85 and the separators 86a and 86b to obtain an electrode plate group 84 ( See Figure 10). Further, the electrode group 84 is sealed in the battery Battery 82 is manufactured.
  • the transfer roller 44 may be configured in the same manner as the cutting roller 48, and conversely, the cutting roller 48 may be configured in the same manner as the transfer roller 44. Further, the processing mechanism 50 can use a saw blade instead of the needle member 66.
  • FIG. 11 shows a main part of an attaching device 100 according to a second embodiment of the present invention.
  • the sticking device 100 includes a cutting / transfer roller 102 in which the transfer roller 44 and the cutting roller 48 in the first embodiment are integrated.
  • the cutting / transfer roller 102 has, for example, a cylinder 104 made of ultra-high-density polyethylene pressed into the outer periphery thereof and a plurality of holes 106 formed in the peripheral surface thereof.
  • Each of the holes 106 has a diameter of 1.5 mm on the open side (small diameter side) and is arranged on the entire circumference at an interval L in the circumferential direction. It communicates with a passage 108 which extends in the direction and is open to one side.
  • the passage 108 is disposed between the sliding start position S3 where the lithium foil 18 is cut and slid on the peripheral surface of the transfer roller 102 and immediately before the sticking position S where the lithium foil 18 is transferred to the electrode plate 12 At this time, it communicates with a vacuum source (ring blower) through the suction opening 110.
  • a vacuum source ring blower
  • Cutting A plurality of grooves 1 14 having a rectangular cross section with a width of 1 mm in the axial direction and 5 mm in the depth direction are formed between the holes 106 on the peripheral surface of the transfer roller 102. It is formed on the entire circumference at intervals L in the circumferential direction. Note that the same components as those of the first embodiment are denoted by the same reference numerals, and a detailed description thereof will be omitted.
  • the lithium foil 18 when the lithium foil 18 is sent to the peripheral surface of the cutting / transfer roller 102, the lithium foil 18 communicates with the suction opening 110.
  • the hole 106 is sucked from the passage 108 via a vacuum source (not shown), and the lithium foil 18 is adsorbed and held on the peripheral surface.
  • CuttingThe transfer roller 102 is intermittently rotated in the direction of the arrow F.
  • the transfer roller 100 is moved through the processing mechanism 50. As a result, perforations 18b are formed in the lithium foil 18.
  • the cutting / transfer roller 102 is intermittently rotated in the direction of arrow G, and when the tip of the partially cut lithium foil 18a reaches the application position S4, the cut / transfer roller 102 is intermittently rotated.
  • the nip roller 46 is displaced to the peripheral surface side of the cutting / transferring roller 102 to press the electrode plate 12 against the tip of the partially cut lithium foil 18a.
  • the nip roller 46 is separated from the electrode plate 12, and the cutting / transfer opening The rotation of the cylinder 102 stops.
  • the perforation 18b is formed on the lithium foil 18 only by using the single cutting / transfer roller 102, and then the perforation 18b is formed.
  • the formed lithium foil 18 (—partially cut lithium foil 18 a) can be separated and transferred onto the electrode plate 12. Therefore, in the sticking device 100, the effect that the overall configuration is further simplified can be obtained.
  • FIG. 12 shows a main part of an attaching device 120 according to the third embodiment.
  • the sticking device 120 is provided with a transfer roller 122 and a feed mechanism 124 for transporting a strip-shaped lithium foil 18 c cut in advance to the transfer roller 122.
  • the transfer roller 122 is configured in the same manner as the transfer roller 44 in the first embodiment, and the same components are denoted by the same reference numerals and detailed description thereof will be omitted.
  • FIG. 13 is a schematic front explanatory view of an attaching device 210 according to a fourth embodiment of the present invention.
  • the sticking device 210 is provided with an electrode plate transport mechanism 214 that sucks the long lithium foil 211 and transports it in the longitudinal direction (in the direction of arrow H), and in synchronization with the electrode plate transport mechanism 214.
  • the lithium foil 2 12 is a hoop material and is sent out from a roll (not shown).
  • the lithium foil 2 12 has a thickness of 20 to 100 mm and a width of 40 to 60 mm.
  • the cutting width is arbitrary within a range of 3 to 20 mm. Is set to L.
  • the electrode plate transport mechanism 2 14 includes a first suction roll 2 24 and a second suction roll 2 26 which are arranged side by side in the direction of arrow H and are in sliding contact with each other.
  • the first suction port 224 includes a fixed inner cylinder 228 and an outer cylinder 230 rotatably disposed around the outer periphery of the inner cylinder 228. .
  • the inner cylindrical body 228 communicates with a negative pressure source (not shown) (for example, a ring blower) and cuts an outer peripheral portion thereof from a vertical direction to a horizontal direction at a predetermined angle, for example, an IB area of 90 °. It has a suction opening 2 32 that is open to the outside.
  • the outer cylinder 230 is press-fitted with a material capable of avoiding adhesion of the lithium foil 212 to the outer periphery, for example, an ultra-high-density polyethylene cylinder 234 is pressed into the outer cylinder 230, and a plurality of the cylinders penetrate in the diameter direction.
  • a suction hole 236 is formed.
  • the suction holes 236 have a diameter of 1.5 mm and are provided on the entire circumference at intervals of L as a cutting pitch in the circumferential direction, and an axial width is provided between the suction holes 236. Rectangular section of 1 mm and depth direction of 5 mm
  • a plurality of grooves 238 having a surface are formed on the entire circumference at intervals L in the circumferential direction.
  • the processing mechanism 2 16 is disposed close to the first suction roll 2 24, and includes a support member 240 connected to driving means (not shown) such as a cylinder and capable of moving forward and backward in the arrow I direction.
  • driving means such as a cylinder and capable of moving forward and backward in the arrow I direction.
  • a plurality of needle members 242 are provided on the support member 240 at predetermined intervals in the width direction of the lithium foil 212, and pressing means are formed on both sides of the needle members 242.
  • the pressing member 244 is supported via a spring 246 so as to be able to advance and retreat.
  • the needle member 242 is positioned so as to face each groove 238 at the stop position of the first suction roll 224 when the first suction roll 224 is intermittently fed. I have.
  • the second suction roll 2 226 has substantially the same configuration as the first suction roll 224, and rotates around the fixed inner cylinder 248 and the outer peripheral portion of the inner cylinder 248. And an outer cylinder 250 freely disposed.
  • the shaft portion 248a of the inner cylindrical body 248 is formed in a hollow shape, and this shaft portion 248a is not shown in the drawing. ) It is connected to the.
  • An outer peripheral portion of the inner cylindrical body 248 is provided with a suction opening portion 252 whose lower side is opened outward at a predetermined angle, for example, 180 °.
  • the outer cylindrical body 250 is rotatably supported by the inner cylindrical body 248 via a bearing 254, and, for example, an ultra-high-density polyethylene cylindrical body 256 is pressed into the outer periphery thereof.
  • a plurality of suction holes 258 are formed in the outer cylindrical body 250 in a diameter direction.
  • Each of the suction holes 255 has a diameter of 5 mm, and is arranged on the entire circumference at an interval L in the circumferential direction, and is provided on the outer peripheral surface of the outer cylindrical body 250.
  • a plurality of annular grooves 260 having a width of 3 mm in the axial direction and a depth of 5 mm are formed at positions avoiding the circumferential direction at intervals of 5 mm in the axial direction.
  • the separation mechanism 218 includes a third suction roll 262 arranged in parallel with the second suction roll 226, and an end 2 of the lithium foil 211 on the outer periphery of the third suction roll 262. ⁇ 2b is provided for assisting separation of the 2b.
  • the third suction roll 26 2 has substantially the same configuration as the first suction roll 22 4, and is rotated around the fixed inner cylinder 26 6 and the outer peripheral portion of the inner cylinder 26 6. And an outer cylinder 268 that is freely arranged.
  • the inner cylindrical body 266 has a suction opening 270 that is opened outward at a predetermined angle, for example, 180 ° in the upper side.
  • the outer cylinder 268 has, for example, an ultra-high-density polyethylene cylinder 272 press-fitted on the outer periphery thereof, and a plurality of suction holes 274 are formed in the diameter direction.
  • Each of the suction holes 274 has a diameter of 1.5 mm and is arranged on the entire circumference at a distance L in the circumferential direction, and the suction holes 274 adjacent to each other in the axial direction have a diameter of 5 mm. They are arranged in Chidori with the following pitch.
  • the outer peripheral surface of the outer cylindrical body 268 is subjected to shallow knurling all around.
  • the separation assisting means 2664 includes a movable base 2776, and a pair of holes 2778 formed in the movable base 2776 have a pair of shafts whose axis is eccentric (e.g., 2 mm).
  • the rotating shaft 280 is inserted.
  • a pressing member 284 is supported at the lower part of the movable base 276 via a linear guide 282 so as to be able to advance and retreat.
  • the pressing member 284 is formed in a plate shape having a narrow and arcuate end face to enter the annular groove 260 of the second suction roll 226. , It is always pulled in the direction of arrow J (third suction roll 2262 side).
  • the sliding range of the pressing member 284 is regulated by a stopper 288 provided on the movable base 276.
  • the transfer mechanism 222 is formed by sliding the electrode plate 220 into sliding contact with the outer circumference of the third suction roll 262 and separating the strip-shaped lithium foils 21c from each other by a predetermined interval P. It has a nip roller 290 for sticking on the electrode plate 220.
  • the nip roller 290 is provided with a shaft 292, and an ultra-high-density polyethylene cylinder 294 press-fitted to the outer periphery of the shaft 292. Extending squares 298 are engaged.
  • the air cylinder 296 communicates with an air supply source through a regulator, and the nipple roller 290 is brought into a range of 100 to 100 kg by the regulator. Nip force is set.
  • FIG. 15 shows a drive system 300 of the sticking device 210 according to the fourth embodiment.
  • the drive system 300 includes a first servomotor 302, a second servomotor 302, and a third servomotor 304.
  • a speed reducer 3 08 is connected to the first servo motor 302, and pulleys 3 1 2a, 3 1 2b and 3 1 2b are provided at the tip of a first drive shaft 3 10 extending from the speed reducer 3 08.
  • the outer cylindrical body 230 constituting the first suction roll 222 is engaged with the timing belt 31 via the timing belt 31.
  • a shaft 318 is engaged via a reversing means 316 composed of a pair of gears engaged with each other, and pulleys 320a,
  • the outer cylindrical body 250 that composes the second suction roll 222 is engaged with the outer cylinder 250 via the timing belt 32 and the timing belt 32.
  • Second drive shaft 3 extending from reduction gear 3 2 4 connected to third servo motor 304
  • a rotating shaft 280 constituting separation assisting means 264 engages with 26 via pulleys 328 a and 328 b and a timing belt 330.
  • a third drive shaft 3 3 4 extends from the speed reducer 3 3 2 connected to the second servo motor 3 06, and the third drive shaft 3 3 4 has pulleys 3 3 6 a and 3 3 6 b
  • the outer cylindrical body 268 that constitutes the third suction roll 262 is engaged via the timing belt 338.
  • the third and second service boats 304, 306 have drivers 340,
  • Means for detecting the thickness of the lithium foil 211 disposed on the upstream side of the first suction roll 222 e.g., a signal from a digital micrometer 324 is sent to a comparator 346.
  • the measurement data is divided into several stages by the comparator 346, information is transmitted to the drivers 340, 342, and the data of the drivers 340, 342 is rewritten.
  • the lithium foil 2 1 2 force is supplied in the direction of the arrow H by rewinding the reel via a sending-out mechanism (not shown), while the first servo motor 3 0 2 constituting the drive system 3 0 0 is driven,
  • the first and second suction rolls 224 and 226 are synchronously driven to rotate in opposite directions (see the arrow K and arrow L directions in FIG. 13). Further, the inside of the inner cylinders 228 and 248 of the first and second suction rolls 224 and 226 is sucked under the action of a negative pressure generating source (not shown).
  • the lithium foil 2 12 is sucked and held on the outer peripheral surface of the first suction roll 2 24 under the suction action of the plurality of suction holes 2 36, and the suction opening 2 3 It is conveyed by suction in the area where 2 is provided.
  • the first servomotor 302 is driven and controlled, and the lithium foils 2 1 and 2 are spaced at intervals L in the arrow H direction. It is transported intermittently.
  • the support member 240 is acted upon by the drive means (not shown) constituting the processing mechanism 2 16.
  • the drive means not shown
  • the plurality of needle members 2 are pressed in a state where the front and rear of the cutting portion of the lithium foil 212 are pressed against the outer peripheral surface of the first suction roll 222 via the pressing member 244 and the spring 246. 42 penetrates the groove 238 to form perforations 2 12 a in the lithium foil 2 12.
  • the first and second suction rolls 2 2 4 and 2 2 6 were intermittently rotated in the directions of the arrows K and L, respectively, in perfect synchronization, thereby forming perforations 2 1 2 a.
  • the lithium foil 212 is transferred from the outer peripheral surface of the first suction roll 222 to the outer peripheral surface of the second suction roll 222 to remove the stress.
  • the suction opening 2 32 of the first suction roll 2 24 is closed at the transfer position S 1 a of the lithium foil 2 1 2, while the suction opening 2 32 of the second suction roll 2 26 is closed. 25 2 is open from the transfer position S 1a.
  • the end 2 1 2 b force of the lithium foil 2 1 2, the second suction roll 2 2 6 and the second (3) comes into sliding contact with the suction roll 26, that is, the separation position S2a.
  • the suction opening 25 2 of the second suction roll 2 26 is closed, and the suction of the lithium foil 21 2 by the second suction roll 2 26 is stopped.
  • the suction opening 270 of the sill roll 262 is opened, and the suction of the lithium foil 221 by the third suction roll 262 is started.
  • the second suction roll 226 rotates intermittently while the third suction roll 262 rotates at a constant speed, the second suction roll 226 and the third suction roll are rotated. A difference occurs in the feed amount between the roll 26 and the roll 26. Therefore, the end 2 12 b of the lithium foil 2 12 is pulled from the other portion of the lithium foil 2 12.
  • the pressing member 284 is always pulled in the direction of the arrow J via the tension spring 286, and after entering the annular groove 260 of the second suction roll 226, the separating position Press the end 2 12 b of the stationary lithium foil 2 1 2 with S 2 a onto the peripheral surface of the third suction roll 2 62. Further, after the pressing member 284 is moved in the rotation direction (the direction of the arrow M) at substantially the same speed as the peripheral speed of the third suction roll 262 under the action of the tension spring 286, The second suction roll 262 is separated from the outer peripheral surface of the third suction roll 262 by being supported by 288. As a result, the lithium foil 2 12 is easily and reliably separated from the perforations 2 12 a, and the strip-shaped lithium foil 2 12 c is adsorbed and held on the outer peripheral surface of the third suction roll 26 2.
  • the strip-shaped lithium foil 2 1 2 c is sucked and conveyed within the range of the suction opening 2 70 at a predetermined interval Pa on the third suction roll 26 2, and the sticking position S At 3a it is pressed onto the electrode plate 220 mixture.
  • the nip roller 290 constituting the transfer mechanism 222 is pressed with a predetermined nip force, and the strip-shaped lithium foil 211c is reliably transferred to the electrode plate 220 by the adhesive force of lithium and the mixture. Is done.
  • a long lithium foil 2 12 is directly adsorbed and held on the outer peripheral surface of the first suction roll 2 24 constituting the electrode plate transport mechanism 2 14.
  • a perforation 2 12 a is provided by the processing mechanism 2 16 while intermittently feeding the lithium foil 2 12.
  • the lithium foil 2 12 is separated from the perforations 2 12 a by the difference in the feed amount between the second and second suction rolls 2 26 and 26 2, and then the strip-shaped lithium foil 2 1 2 c is stuck on the electrode plate 220.
  • a high-precision cutting mechanism is not used for the processing mechanism 2 16, and it is sufficient to use a processing mechanism 2 16 for forming perforations substantially provided with a plurality of needle members 2 42.
  • the lithium foil 212 is cut by the difference between the feeding amounts of the second and third suction rolls 226 and 262. As a result, the equipment cost can be effectively reduced, and the overall size and simplification of the attaching device 210 can be easily achieved.
  • the range of the suction opening 2 3 2. 2 5 2 and 2 7 0 provided in each inner cylinder 2 2 8, 2 4 8 and 2 6 6 is set. The delivery operation of the lithium foil 212 is stably performed.
  • the first and second suction rolls 2 24, 22 6 may be controlled by controlling the first servomotor 302 to change the intermittent transfer speed.
  • the number of revolutions of the third suction roll 2 62 by the third suction boiler 304 can be changed by rewriting the data of the driver 3 4 2 See 17).
  • the separation assisting means 2664 adjusts the peripheral speed of the third suction roll 262 so that the pressing member 284 operates at a timing corresponding to one pitch feed of the second suction roll 2266.
  • the rotation speed is set accordingly.
  • FIG. 18 shows a drive system 402 of an attaching device 400 according to a fifth embodiment of the present invention. Note that the same components as those of the attaching device 210 according to the fourth embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.
  • the drive system 402 has a single motor 404, and an index cam mechanism 410 is connected to a drive shaft 408 extending from the reducer 406 connected to the motor 404. Is done. First and second suction rolls 224 and 226 are connected to the intermittent rotation shaft 412 extending from the index cam mechanism 410, respectively.
  • a variable speed machine 4 18 is connected to the drive shaft 408 via pulleys 4 14 a and 14 b and a timing belt 16, and a rotation extending from the variable speed machine 4 18.
  • the shaft 420 is connected to the third suction roll 262.
  • a clutch mechanism 424 is connected via a reversing means 422, and this clutch mechanism 424 is arranged at an intermittent rotation output part of the index cam mechanism 410.
  • the clutch is connected via a signal output from the detector 426 at a timing of one pitch, and the torque is transmitted to the rotating shaft 280 of the separation assisting means 264.
  • One rotation of the clutch mechanism 424 is detected by the origin detection sensor 428.
  • An air clutch brake with good responsiveness is used as the clutch mechanism 424.
  • This intermittent rotation output is transmitted to the first and second suction rolls 222, 226 as in the fourth embodiment, and the first and second suction rolls 224, 222 are transmitted. 6 rotates intermittently synchronously.
  • the clutch mechanism 4 2 4 inputs a signal from the detector 4 2 6 at the pitch of the intermittent rotating shaft 4 1 2 at every pitch, connects the clutch at the same timing, and connects the clutch Power is transmitted to the rotating shaft 280. Further, the clutch mechanism 424 disconnects the clutch by a signal from the origin detection sensor 428 when the rotating shaft 280 makes one rotation.
  • the sticking pitch can be changed by changing the speed of the variable speed machine 418.
  • the speed at the time of the nib of the pressing member 284 and the peripheral speed of the third suction roll 262 are required.
  • the operation timing can be set on the second suction roll 226 side. Therefore, the effect of easily changing the setting of the sticking pitch can be obtained.
  • the perforation 2 1 by the needle member 2 4 2 constituting the processing mechanism 2 16 can be performed without using the first suction port 2 24.
  • 2a can be set at any point on the upstream side.
  • a processing mechanism 450 constituting the attaching device according to the sixth embodiment of the present invention shown in FIG. 19 is employed. You may.
  • the processing mechanism 450 includes a rotating roll 452, and a plurality of needle members 454 spaced apart by a predetermined distance L are provided on the peripheral surface of the rotating roll 452.
  • the processing mechanism 450 can continuously process the perforations 212 a in the lithium foil 212 by continuously rotating the first suction roll 222.
  • FIG. 20 is a schematic diagram showing the ffl of the lithium foil sticking apparatus 510 according to the seventh embodiment of the present invention. It is a block diagram.
  • a transport path length variable mechanism 530 which is disposed between the first and second attaching mechanisms 5220 and 5222 and which can arbitrarily change the length of the transport path 528 of the electrode plate 512.
  • Separation overnight 5 2 4 is wound around the separation night feeding shaft 5 3 1, and this separation night feeding shaft 5 3 1 is opposite to the feeding direction, for example, 0.2 kgf Z width Tension is applied.
  • the electrode plate transport mechanism 5 16 holds the electrode plate 5 12 by suction, and a main feed roller 5 3 4 for quantitatively feeding the electrode plate 5 12 via a servo motor 5 32 2, and the electrode plate 5 1 And a plurality of paths ⁇ - rollers 536 for transporting 2 from the delivery shaft 514 to the winding shaft 526.
  • This servo motor 5 3 2 is a control circuit (control means)
  • the first and second sticking mechanisms 5220 and 5222 are respectively a first and a second feed shaft 542 that integrally winds a long lithium foil 518a and an interleaf 540.
  • a first and a second interleaf take-up for winding the interleaf 540 in order to send out the lithium foil 518a from the first and second feed shafts 542, 544.
  • the first and second interleaf take-up shafts 546, 548 are provided in close proximity to the first and second feed-out shafts 542, 544, and the And the second interleaf take-up shaft 546 and 548 are rotated in the direction of the arrow so as to be integrally wound with the lithium foil 518a on the first and second feed shafts 542 and 544. Take up the interleaving paper 540 that is being rotated.
  • the first and second feed shafts 5 4 2 and 5 4 4 and the first and second interleaf take-up shafts 5 4 6 and 5 4 8 are arranged in the first and second units 5 5 0 and 5 5 2. Have been.
  • the first and second units 550 and 552 can be moved in a direction perpendicular to the feeding direction (arrows R and S directions) of the lithium foil 518a (a direction perpendicular to the plane of FIG. 20). It is.
  • first and second dancer rollers 554, 556 On the downstream side of the first and second dancer rollers 554, 556, the first and second cutting rollers 558, which hold and hold the lithium foil 518a on the outer peripheral surface over a predetermined angular range. 560, and an electrode plate holding the lithium foil 518a, which is arranged side by side with the first and second cutting rollers 558, 5600 and partially cut by processing means described later.
  • First and second transfer rollers 562, 564 intermittently rotating on one surface 512a side of 512 are provided.
  • first and second processing mechanisms 566 that intermittently form openings, for example, perforations, along the cutting portion provided at right angles to the transport direction of the lithium foil 518a. , 5 6 8 are arranged to be able to move forward and backward.
  • the first machining mechanism 566 includes a blade member 572 that can move forward and backward with respect to the first cutting roller 558 via a servomotor 570.
  • a stripper member 574 supported on the blade member 572 so as to be able to advance and retreat, and a brush portion provided on the stripper member 574, on which the blade member 572 slides during processing.
  • the brush member 5776 includes a supply member 5780 for supplying a saturated hydrocarbon (C IntelH 2 n + 2 ) 5778 as a lithium adhesion preventing agent.
  • the servomotor 570 is fixed to a support plate (not shown), and a cam 586 is fixed to a rotating shaft 584 of the servomotor 570.
  • the cam follower 5888 that comes into contact with the cam 5886 is attached to one end of an arm member 592 that is swingable about a fulcrum 590.
  • a mouth-follower 594 is attached via a position adjusting means 596.
  • the position adjusting means 5996 includes a bolt 598 and a holder 600 on which the bolt 598 is screwed and on which the roller follower 5994 is supported.
  • the lower ends of rods 6a and 6b are fixed to the elevating plate 62 on which the roller follower 594 is placed.
  • the 604a and 604b are inserted into the casing member 606 via the liquid-tight bushes 608a and 608b.
  • the casing member 606 is fixed to a support plate (not shown), and has a storage part 610 for circulating a saturated hydrocarbon 578 therein.
  • the strip bar member 5 7 4 is provided with an opening 6 20 for disposing the brush member 5 7 6, and a plurality of passages 6 2 2 forming the supply means 5 8 0 are provided in the opening 6 20.
  • the supply means 580 includes a first pipe 624 having one end communicating with the storage section 610 of the casing member 606, and the other of the first pipe 624.
  • a tank 6 2 6 having an open end and storing a saturated hydrocarbon 5 78, a second pipe 6 2 8 having one end opened to the tank 6 2 6, and the second pipe 6 2
  • a pump 63 0 connected to the pump 8 a third pipe 63 2 connected to the outlet side of the pump 63 0, and an intermediate tank 63 opening the third pipe 63 2.
  • a fourth pipe 636 that communicates with the intermediate tank 634 and the passage 622 of the strip member 574.
  • the second processing mechanism 568 is configured in the same manner as the first processing mechanism 566 described above, and the same components are denoted by the same reference characters and detailed description thereof will not be repeated.
  • the first and second transfer rollers 5 6 2, 5 6 are located at positions facing the first and second transfer rollers 5 62, 5 64 from the other surface 5 1 2 b side of the electrode plate 5 1 2.
  • First and second nip rollers 6400, 642 for pressing the peripheral surfaces of the first and second transfer rollers 562, 564 in synchronization with 4 are provided.
  • variable transport path length mechanism 5300 slides into contact with one surface 5 1 2a of the electrode plate 5 1 2
  • an adjustment port that can move in the direction of arrow D is provided.
  • a ball screw 65 0 is connected to the rotating shaft 64 8 of the motor 64 4, and the ball screw 65 0 It is fitted to a support 651 that rotatably supports 46.
  • the motor 644 is controlled by the control circuit 538 (see FIG. 21).
  • an electrode material-coated portion and an uncoated portion provided on one surface 5 12 a of the electrode plate 5 12 are provided on the upstream side of the first attaching mechanism 52.
  • a first sensor (detection means) 652 for detecting an application boundary portion (not shown) with the electrode plate 51 is provided, and the electrode plate 51 is provided upstream of the second attaching mechanism 52.
  • a second sensor (detection means) 654 for detecting a coating boundary portion (not shown) between the coated portion and the uncoated portion provided on the other surface 5 12 b of 2 is provided.
  • the first and second sensors 652, 6554 are The control circuit is connected to 538.
  • First and second shaft cores 680 and 682, and first and second shaft cores 680 and 682 into which the first and second shaft cores 680 and 682 are press-fitted are made of resin such as high-molecular-weight polyethylene or polypropylene.
  • the first and second cylindrical bodies 6884, 6886 are provided. On the outer peripheral surface of the first and second cylindrical bodies 684, 6886, ⁇ 50 knurls
  • Both ends of the first shaft core 680 of the first roller 674 are rotatably supported by a holder 694 via a bearing 692, and one end of the first shaft core 680 is The pulley 6 9 6 is mounted on the shaft.
  • a drive belt 698 connected to a drive source (not shown) is engaged with the pulley 696.
  • the first roller 674 is driven to rotate at a peripheral speed equal to or higher than the line speed of the electrode plate 512 (for example, 20 cmsec), and the overfoot ratio is set to 100% to 120%. .
  • Both ends of the second shaft core 682 of the second roller 678 are rotatably supported by the holder 694 via a bearing 700.
  • the holder 694 is provided with an opening 702 that fits the bearing 700 so as to be able to advance and retreat in the arrow X direction, and a pressing member is provided on the bearing 700.
  • each pressing member 704 engages.
  • One end of each pressing member 704 has a curved shape corresponding to the shape of the bearing 700, and one end of a spring 676 contacts the other end.
  • the other end of the spring 676 is supported by a support plate 706 fixed to the holder 694 with screws.
  • the pressing force of the second roller 678 is set to a linear width of 8 kgZ.
  • a hoop-shaped electrode plate 5 12 is wound around the delivery shaft 5 14, while the first and second delivery shafts 5 4 2 and 5 4 4 are wound around the delivery shaft 5 14.
  • the hoop-shaped lithium foil 518 a is a thin metal foil, and is wound in a state of being overlapped with a slip sheet 540 formed of a non-adhesive material such as polypropylene or polyethylene. This is because the lithium foil 518a does not adhere to specific materials such as polypropylene and polyethylene, but adheres to most other materials.
  • a hoop-shaped separator 524 is wound around the separator delivery shaft 531.
  • the feed shaft 5 14 is reversely rotated by a torque motor (not shown) to apply a constant torque to the plate 5 12, and the plate 5 12 is guided by the pass roller 5 3 Conveyed through 3 4.
  • the main feed roller 534 constitutes a suction drum, which sucks the electrode plate 512 and performs a fixed amount conveyance through the servo motor 532. Therefore, the electrode plate 5 12 is conveyed in a fixed amount in the direction of arrow A via the electrode plate transfer mechanism 5 16 including the main feed roller 5 34 and the pass roller 5 36.
  • a predetermined tension for example, 50 g
  • the first dancer roller 554 a predetermined tension, for example, 50 g
  • the take-up shaft 546 is driven to rotate, and only the slip sheet 540 is taken up.
  • the lithium foil 518 a is smoothly fed out from the first feed shaft 542 under a constant tension by the first dancer roller 554 in a state where the tension variation due to rewind does not act, and the first cutting is performed. It is transferred to the roller 558 side.
  • the lithium foil 518 a is attracted and held on the outer peripheral surface of the first cutting roller 558 with a predetermined tension applied by the first dancer roller 554, and the first cutting roller 558 is provided. Is rotated intermittently, whereby the lithium foil 518a is intermittently conveyed at a predetermined cutting pitch. And the cutting part of lithium foil 5 18 a
  • the blade member 572 is subjected to a predetermined processing to the lithium foil 518 a held on the strip member 574 to carry out the above-mentioned lithium foil 510.
  • a perforation is formed at 8a (see Fig. 28B).
  • the roller follower 594 is moved by the spring 614.
  • the lifting plate 602 is pressed downward against this.
  • the stripper member 574 holds the lithium foil 518a on the first cutting roller 558
  • the blade member 572 descends integrally with the plate 612 (see FIG. 28 C).
  • the stripper member 574 is separated from the first cutting roller 558.
  • a brush member 576 is provided on the strip bar member 574, and a saturated hydrocarbon 578 is provided on the brush member 576 via the supply means 580. Supplied. Therefore, when the blade member 572 slides on the brush member 576, the saturated hydrocarbon 578 impregnated in the brush member 576 is smoothly and reliably applied to the blade member 572. Applied to
  • the blade member 572 slides on the brush member 576 every time the lithium foil 518a is processed, and the saturated hydrocarbon 578 is removed from the brush member 576. Fully applied. Therefore, with a very simple configuration, it is possible to reliably prevent lithium from adhering to the blade member 572, and it is possible to continuously perform efficient and highly accurate processing. can get. Further, in the seventh embodiment, the saturated hydrocarbon 5778 was once supplied from the tank 626 to the intermediate tank 634 under the action of the pump 630, and then connected to the intermediate tank 634. The saturated hydrocarbon 5778 is supplied from the fourth pipe 636 to the plurality of passages 62 of the strip bar member 574 by utilizing gravity, osmotic pressure and the like. Therefore, brush member 5
  • the saturated hydrocarbon 5778 overflowing from the brush member 576 is temporarily stored in the storage section 610 in the casing member 60, and is stored in the tank 626 via the first pipe 624. Will be returned. Further, the saturated hydrocarbon 578 is passed through the second to fourth pipes 62, 63 32 and 63 36 under the action of the pump 63 0, and passes through the passage 62 2 of the strip bar member 57 4. Circulated to Therefore, there is an advantage that relatively expensive saturated hydrocarbon 578 can be economically utilized.
  • the supply means 580 has an intermediate tank 634 between the pump 630 and the brush member 576. Accordingly, it is not necessary to control the discharge amount of the pump 630, and even when the saturated hydrocarbon 578 is circulated and supplied, the saturated hydrocarbon 578 is stabilized and the brush member 576 Can be supplied to
  • dodecane is used as a lithium adhesion preventing agent. Therefore, even if this dodecane is attached to the lithium foil 518a processed by the blade member 572, the lithium This dodecane volatilizes before moving to the battery assembly process using the foil 518a. Therefore, there is obtained an effect that dodecane is not mixed in the battery, and a decrease in battery performance can be reliably prevented.
  • the first cutting roller 558 and the first transfer roller 562 are driven to rotate in the opposite directions in synchronization with each other in force, the lithium foil 518 a on which perforations are formed is 1
  • the transfer roller 558 is transferred from the outer peripheral surface to the outer peripheral surface of the first transfer roller 562.
  • the first nip roller 640 moves to the other surface 512b of the electrode plate 512 in synchronization with the rotation of the first transfer roller 562. This The first nip roller 640 presses the electrode plate 512 toward the first transfer roller 562 with a predetermined nip pressure.
  • the first nip roller 6 40 is moved to the electrode plate 5 1. 2 and the rotation of the first transfer roller 562 is stopped. Therefore, the electrode plate 5 12 which is being conveyed quantitatively by the electrode plate transport mechanism 5 16 and the electrode plate 5 12 which is partially adhered to and held on the outer peripheral surface of the first transfer roller 5 62 There is a speed difference between the lithium foil 518a and the lithium foil 518a, which is easily and reliably separated from the perforation and transferred as a strip-shaped lithium foil 518 on the electrode plate 512. You.
  • the pole 511 having the strip-shaped lithium foil 518 adhered to one surface 51a of the first pasting mechanism 520 passes through the variable transport path length mechanism 530 to the second pasting mechanism. It is transported to the 5 2 2 side.
  • the strip-shaped lithium foil 5 18 is attached to the other surface 5 12 b of the electrode plate 5 12 o
  • the strip-shaped lithium foil 5 18 is attached to both sides 5 1 2 a and 5 1 2 b of the electrode plate 5 1 2, and the electrode plate 5 1 2 is sent out from the separation feeding shaft 5 3 1. Wrapped around the winding shaft 5 2 6
  • the timing of attaching the strip-shaped lithium foil 518 to one surface 512a of the electrode plate 512 by the first attaching mechanism 5220 is based on the detection signal of the first sensor 652. Controlled. That is, as shown in FIG. 21, when the first sensor 652 detects a coating boundary portion (not shown) provided on one surface 512a of the electrode plate 512, a detection signal thereof is given. Is sent to the control circuit 538. The control circuit 538 drives the servomotor 532 based on the detection signal to count the number of pulses, and when the number of pulses corresponding to the predetermined moving distance is counted, the first The sticking mechanism 520 is driven.
  • the sticking timing of the strip-shaped lithium foil 518 by the second sticking mechanism 522 is performed by the coating provided on the other surface 512b of the electrode plate 512 by the second sensor 654. This is performed by detecting a cloth boundary part (not shown).
  • the transfer path length variable mechanism is provided via the control circuit 538. Driven by 5 3 0 force.
  • the motor 644 constituting the variable transport path length mechanism 530 is driven, the ball screw 645 connected to the rotating shaft 648 of the motor 644 is driven. 0 rotates.
  • the adjusting roller 6 4 6 moves in the direction of the arrow T together with the support 6 5 1 into which the ball screw 6 5 0 fits.
  • the entire length of the transport path 528 of the electrode plates 512 becomes longer.
  • Mechanism 530 is provided. Therefore, by simply changing the length of the transport path 528 via the variable transport path length mechanism 530, the strip-shaped lithium foil 518 by the first and second attaching mechanisms 520, 522 can be used. Can be easily and reliably matched. In other words, the work of attaching the strip-shaped lithium foil 518 by the first attaching mechanism 520 and the work of attaching the strip-shaped lithium foil 518 by the second attaching mechanism 522 are both one frame. During the transfer of the electrode plate 5 12 for one minute (one battery) from the start to the end at the same timing.
  • the NG generation portion is attached to the second attachment mechanism 5222 in any order. It is possible to easily detect whether or not a part corresponds to a part. As a result, the NG information of the first attaching mechanism 522 is accurately sent to the second attaching mechanism 522, and the entire control including the NG information and the data shift can be performed easily and accurately. The effect is achieved.
  • the strip-shaped lithium foil 518 is attached by the first attaching mechanism 520, and the strip-shaped lithium foil 518 is attached by the second attaching mechanism 522. Can be started almost simultaneously. Therefore, the pole motor is not affected by the rising speed of the servo motor 532 constituting the pole plate transport mechanism 5 16 Variations in the position at which the strip-shaped lithium foil 518 is to be applied are prevented from fluctuating between the two surfaces 512a and 512b of the plate 512, and a high-precision application process can be performed.
  • variable transport path length mechanism 5330 is provided with an adjusting roller 6446 that can slide in the direction of arrow T under the action of the motor 644 in sliding contact with the electrode plate 512. For this reason, there is an advantage that the entire configuration of the variable transport path length mechanism 530 is effectively simplified.
  • the electrode plate 51 which is fixedly transported by the electrode transport mechanism 51 16 and the electrode plate 51 2 are partially attached.
  • the lithium foil 518a is separated by a speed difference generated between the first and second transfer rollers 562, 564 and the lithium foil 518a held on the outer peripheral surface.
  • it is configured to be transferred on the electrode plate 5 12 as a strip-shaped lithium foil 5 18.
  • the sticking process may be terminated in a state where the strip-shaped lithium foil 518 is partially adhered to both surfaces 512a and 512b of the electrode plate 512. You.
  • the electrode plate 512 and the strip-shaped lithium foil 518 inserted between the first and second rollers 674, 678 are in the direction of the arrow Y under the rotation of the first roller 674. While being pressed by the second roller 678 and the first roller 674 under the urging action of the spring 676.
  • the strip-shaped lithium foil 5 18 even if the strip-shaped lithium foil 5 18 is partially attached to the electrode plate 5 12, the strip-shaped lithium foil 5 18 only passes through the pressing mechanism 6 The entire lithium foil 5 18 can be securely and accurately adhered to the electrode plate 5 12. For this reason, for example, it is possible to effectively prevent the problem that the strip-shaped lithium foil 5 18 rises from the electrode plate 5 12 or separates from the electrode plate 5 12.
  • the pressing force ⁇ ), knurls 688, 690 are applied to the outer peripheral surfaces of the first and second rollers 674, 678. Therefore, the contact area between the first and second rollers 674, 678 and the strip-shaped lithium foil 518 is reduced, and sufficient adhesion strength can be imparted to the strip-shaped lithium foil 518. it can. As a result, it is possible to obtain an effect that sufficient adhesion strength can be reliably provided to the strip-shaped lithium foil 518 with a simple configuration.
  • the electrode plate 512 passing through the pressing mechanism 670 is wound on the take-up shaft 526 in a state of being superimposed on the separating plate 524 sent out from the laying-out feed shaft 331. (See Figure 20).
  • the first and second cylindrical bodies 684, 686 of the first and second rollers 674, 678 are formed of resin. It is not limited, and stainless steel (SUS) or various metals subjected to electroless nickel plating may be used. Industrial applicability
  • the method for attaching a lithium foil As described above, in the method for attaching a lithium foil, the method for attaching the lithium foil, and the apparatus for manufacturing a lithium electrode according to the present invention, since the lithium foil is smoothly sent out under a certain tension, the lithium foil may be damaged. Thus, the lithium foil can be reliably sent out to the processing means in a normal state.
  • the position of the lithium foil and the bonding interval can be arbitrarily set only by changing the transport speed of the electrode plate and the rotation speed of the transfer roller. It is possible to prevent variations in battery performance due to variations in thickness of the battery. In addition, there is no need to use a support such as a resin film that is cut integrally with the foil, and the foil can be handled as a single unit, making it economical and cost effective. It becomes possible to reduce.
  • strip-shaped lithium foil is stuck to both surfaces of the long electrode plate via the first and second sticking mechanisms at predetermined intervals, and A transport path length variable mechanism that can arbitrarily change the length of the transport path of the electrode plate is provided between the first and second attaching mechanisms. For this reason, by simply changing the length of the transport path of the electrode plate via the variable transport path length mechanism, the application timings of the lithium foils by the first and second application mechanisms can be reliably matched.
  • the above-mentioned lithium foil can be easily and accurately attached to both sides of the electrode plate.
  • the blade member advances and retreats to process the lithium foil, the blade member slides on a brush member provided on the strip bar member, so that the blade member is A saturated hydrocarbon is applied. For this reason, it is possible to reliably prevent lithium from adhering to the blade member, and furthermore, the saturated hydrocarbon adhering to the lithium is volatilized and removed during the lithium battery manufacturing process and mixed into the lithium battery. There is no.
  • the electrode plate is attached to the electrode plate under the action of a pressing mechanism.
  • the entire lithium foil can be securely adhered.

Abstract

L'invention porte sur un procédé et un dispositif simplifiant la manipulation des feuilles de lithium et en même temps leur transfert sur une plaque polaire selon un pas arbitraire et avec une grande précision. Un dispositif de collage des feuilles de lithium comporte: un mécanisme porteur (42) de plaques polaires (12) qui les transporte en continu, un rouleau transporteur (44) qui tourne de manière intermittente sur l'un des côtés de la surface (12a) des plaques polaires (12) tout en maintenant une plaque de lithium partialement découpée (18a) à sa surface périphérique, un rouleau exprimeur (44) qui presse la surface périphérique du rouleau (44) de manière synchrone depuis l'autre côté de la surface (12b) des plaques polaires (12), et un rouleau danseur (35) qui confère une tension permanente à la feuille de lithium (18) distribuée de manière intermittente par un arbre distributeur (30) tandis qu'un arbre enrouleur de papier multicouche (34) tourne de manière intermittente.
PCT/JP1997/000816 1996-03-14 1997-03-14 Procede et dispositif de collage de feuilles de lithium et procede de fabrication d'electrodes de lithium WO1997034329A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU19409/97A AU1940997A (en) 1996-03-14 1997-03-14 Method and device for sticking lithium foil and method for manufacturing lithium electrode

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP5801696A JPH09251852A (ja) 1996-03-14 1996-03-14 リチウム箔の切断・貼付方法および装置
JP8/58016 1996-03-14
JP8/81765 1996-04-03
JP8176596A JP4026183B2 (ja) 1996-04-03 1996-04-03 リチウム箔の貼付方法および貼付装置

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WO1997034329A1 true WO1997034329A1 (fr) 1997-09-18

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CN111761364A (zh) * 2020-06-18 2020-10-13 合肥国轩高科动力能源有限公司 一种间歇涂布式极片用模切焊接设备以及模切焊接方法

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CN108417371B (zh) * 2018-01-19 2024-03-19 海目星激光科技集团股份有限公司 一种变压器的包铜箔设备
CN111761364A (zh) * 2020-06-18 2020-10-13 合肥国轩高科动力能源有限公司 一种间歇涂布式极片用模切焊接设备以及模切焊接方法

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