WO2013137385A1 - Électrode, procédé de production et dispositif de production correspondant - Google Patents

Électrode, procédé de production et dispositif de production correspondant Download PDF

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Publication number
WO2013137385A1
WO2013137385A1 PCT/JP2013/057177 JP2013057177W WO2013137385A1 WO 2013137385 A1 WO2013137385 A1 WO 2013137385A1 JP 2013057177 W JP2013057177 W JP 2013057177W WO 2013137385 A1 WO2013137385 A1 WO 2013137385A1
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WIPO (PCT)
Prior art keywords
active material
electrode
material layer
thin
region
Prior art date
Application number
PCT/JP2013/057177
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English (en)
Japanese (ja)
Inventor
重男 木村
平野　晋一
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日産自動車株式会社
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Filing date
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Application filed by 日産自動車株式会社 filed Critical 日産自動車株式会社
Publication of WO2013137385A1 publication Critical patent/WO2013137385A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/593—Spacers; Insulating plates
    • 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
    • H01M4/0402—Methods of deposition of the material
    • H01M4/0404—Methods of deposition of the material by coating on electrode collectors
    • 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
    • H01M4/0402—Methods of deposition of the material
    • H01M4/0409—Methods of deposition of the material by a doctor blade method, slip-casting or roller coating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/595—Tapes
    • 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

  • the present invention relates to an electrode used for, for example, a lithium ion battery, a manufacturing method thereof, and a manufacturing apparatus.
  • JP2006-175415A discloses a technique for covering a terminal of a positive electrode and sticking a tape member functioning as a spacer in order to prevent an internal short circuit between a positive electrode and a negative electrode of a lithium ion battery.
  • the active material layer is not formed but the electrode surface is exposed and the region extending in the width direction is formed at regular intervals.
  • An electrode terminal is joined to the exposed electrode surface by ultrasonic welding or the like, and the tape member extends in the width direction of the belt-like electrode across the electrode terminal surface, the exposed electrode surface and the region of the edge portion of the active material layer. Is pasted.
  • an uncoated region where no active material layer is applied is formed at one or both ends in the width direction, and the uncoated region is used as a tab for connecting electrode terminals.
  • a tape member functioning as a spacer is disposed by pasting or the like across the tab and the edge portion of the active material layer.
  • An object of the present invention is to provide an electrode suitable for performing an operation of arranging a tape member that functions as a spacer in succession to the application of an active material layer, and a method and an apparatus for manufacturing the electrode.
  • the electrode manufactured by the manufacturing apparatus has an uncoated region in which the active material extending in the longitudinal direction is not applied to at least one end in the width direction of the strip-shaped electrode raw material, and the active material is continuous in the longitudinal direction in the remaining width direction. And the active material layer applied to the surface.
  • a spacer member made of an insulating material is disposed in the longitudinal direction on the electrode so as to straddle the boundary portion between the uncoated region and the active material layer and cover a part of each.
  • the manufacturing apparatus applies the active material to the electrode material so that the thickness of the active material layer in the region where the spacer member is disposed is thin with a step with respect to the thickness of the active material layer in the other region.
  • a coating section is provided. Further, the manufacturing apparatus includes a spacer arrangement portion that arranges a spacer so as to cover at least a part of the thin part of the applied active material layer and a part of the uncoated region.
  • FIG. 1 is a schematic configuration diagram illustrating a first example of an electrode manufacturing apparatus according to a first embodiment of the present invention.
  • FIG. 2 is a perspective view of the die coater.
  • FIG. 3 is a perspective view of a shim used in the die coater.
  • FIG. 4 is a front view showing a slit of the die coater.
  • FIG. 5 is a cross-sectional view of an electrode fabric provided with an active material layer that has been applied and dried.
  • FIG. 6 is a front view showing a slit of a die coater showing a specific example of a shim shape.
  • FIG. 7 is a perspective view showing another specific example of a shim shape.
  • FIG. 8 is a front view showing an example of a slit of the die coater.
  • FIG. 1 is a schematic configuration diagram illustrating a first example of an electrode manufacturing apparatus according to a first embodiment of the present invention.
  • FIG. 2 is a perspective view of the die coater.
  • FIG. 9 is a front view showing the sticking roller.
  • FIG. 10 is a cross-sectional view of the original electrode fabric in a state where a protective tape is applied.
  • FIG. 11 is a perspective view showing a winding state of the strip electrode.
  • FIG. 12 is a schematic configuration diagram illustrating an electrode manufacturing apparatus according to a second example of the first embodiment.
  • FIG. 13 is a schematic block diagram which shows the manufacturing apparatus of the electrode of 2nd Embodiment of this invention.
  • FIG. 14 is a front view showing a slit shape of a die coater for applying an insulating material.
  • FIG. 15 is a cross-sectional view of an electrode material having a coated active material layer.
  • FIG. 16 is a cross-sectional view of an electrode raw fabric coated with an active material layer and a protective layer.
  • FIG. 1 is a schematic configuration diagram illustrating a first example of an electrode manufacturing apparatus according to the first embodiment.
  • an electrode manufacturing apparatus includes an electrode raw fabric 1 between an unwinding portion 2 and a winding portion 10 of an electrode raw fabric 1 (electrode band, electrode sheet, or electrode foil) made of metal foil.
  • Two coating parts 3 and 5 which apply an active material on both sides, and two drying parts 4 and 6 which dry the applied active material layer 12 on each side of electrode raw fabric 1 are provided.
  • the electrode manufacturing apparatus also includes an affixing unit 7 that affixes protective tape 13 as a spacer on both sides of the active material layer 12 and a press unit 8 that roll-presses the active material layer 12.
  • the slit part 9 which divides the obtained strip electrode into two strip electrodes is added.
  • two coating parts 3 and 5 and two drying parts 4 and 6 are arranged so that the active material layer 12 is formed on both surfaces of the electrode raw fabric 1.
  • the unwinding part 2 is a part to which the electrode raw material 1 made of a metal foil wound in a reel shape is attached.
  • the unwinding electrode raw material 1 for positive electrode or negative electrode is unwound and applied to the coating part 3 (front surface coating part). ), Drying unit 4 (front surface drying unit), back surface coating unit 5, and back surface drying unit 6.
  • the coating unit 3 applies an active material to the unrolled electrode raw material 1 with a die coater to form an active material layer 12 on the surface of the electrode raw material 1.
  • a region where the active material layer 12 is not applied is provided as an uncoated region 11 in the longitudinal direction of the electrode original fabric 1.
  • the uncoated region 11 is used as an electrode tab. For this reason, the active material layer 12 is formed in the area
  • the applied active material layer 12 is formed in a thick portion 12A having a normal film thickness in the central region. However, in a predetermined width from both ends in the width direction of the electrode fabric 1, there are thin portions 12B having a thickness smaller than the thickness of the thick portion 12A along the longitudinal direction.
  • the drying unit 4 back surface drying unit 6) volatilizes and drys the diluted solvent contained in the applied active material layer 12.
  • the pasting part 7 covers all or part of the thin part 12B at both ends in the width direction of the active material layer 12 that has been applied and dried, and covers a part of the uncoated region 11 that continues to the outside in the width direction of the thin part 12B.
  • the protective tape 13 that functions as a spacer is pasted.
  • the pressing unit 8 increases the packing density of the active material layer 12 and makes it uniform by passing the electrode raw material 1 in which the active material layer 12 is formed and the protective tape 13 is attached to both end regions between the rolling rolls. Complete the strip electrode.
  • the coating unit 3 includes a backup roller 21 around which the electrode fabric 1 is wound, and a die coater 20 that applies a coating solution to the electrode fabric 1 that passes over the backup roller 21.
  • the width direction of the electrode raw fabric 1 is referred to as the “width direction” of the coating portion 3. Therefore, the direction substantially parallel to the axis of the backup roller 21 around which the electrode fabric 1 is wound is the width direction.
  • the coating unit 3 includes one or a plurality of guide rollers 22 in addition to the backup roller 21, and the electrode fabric 1 is wound with tension. Due to the rotation of the rollers 22, the electrode raw material 1 wound up in a roll shape is continuously fed out to the coating unit 3 at a predetermined speed, and is conveyed to the drying unit 4.
  • the die coater 20 causes a coating liquid supplied from a coating liquid tank (not shown) to flow out from the slit 24 opened in the beak-shaped nozzle 23 and is applied to the electrode fabric 1 on the backup roller 21.
  • the slit 24 of the nozzle 23 of the die coater 20 is long in the width direction of the electrode original fabric 1, and the opening width of the slit 24 defines a prescribed width in which the coating liquid is applied to the electrode raw fabric 1.
  • the slit 24 of the nozzle 23 of the die coater 20 has a first shim 25 with a coating width set to be thin (for example, 0.3 mm) and a coating applied from the shim 25. It is formed by overlapping a second shim 26 having a narrow work width (for example, 4 mm narrow on both sides) and a slightly thick thickness (for example, 0.5 mm). That is, the first shim 25 and the second shim 26 are overlapped in this order on the nozzle forming surface of one die head 20A, and the nozzle forming surface of the other die head 20B is further overlapped and fixed by fastening bolts (not shown). As a result, as shown in FIG. 4, slits 24 are formed which are thin in both end regions in the width direction and thick in the central region excluding both end regions.
  • the width and thickness of the thin portion 12B and the thick portion 12A of the active material layer 12 can be arbitrarily changed. Thereby, it is not necessary to exchange a dedicated shim for each type of electrode, and the equipment cost can be reduced. Further, since the die coater 20 is formed by overlapping simple flat shims 25 and 26, the shape of the slit 24 can be formed with high accuracy, and the coating accuracy when the die coater 20 is used can be improved.
  • the electrode slurry is supplied to the die coater 20 and coating on the electrode raw material 1 is started.
  • the active material layer 12 applied to the electrode raw fabric 1 from the die coater 20 has a normal film thickness (thick portion 12A) in the central region.
  • step coating step coating
  • both ends in the width direction of the active material layer 12 have a thickness dimension smaller than a normal film thickness (thick portion 12A) applied to the central region, The thin portion 12B is formed.
  • the thickness of the thin portion 12B is, for example, 30 ⁇ m or more in a width dimension of 2 to 10 mm and 40 ⁇ m or less smaller than the normal film thickness applied to the central region.
  • the applied active material layer 12 is transported to the pasting unit 7 after being dried by the drying units 4 and 6.
  • the back surface coating unit 5 applies the same step coating to the other surface (back surface) of the electrode raw fabric 1 using the same coating die coater as the coating unit 3.
  • the back surface drying unit 6 dries the active material layer 12 on the back surface.
  • the electrode raw fabric 1 having the active material layer 12 formed on both sides includes the active material layer 12 coated with a step as shown in FIG. 5, and a thick portion 12A having a normal film thickness in the central region. And the thin portion 12B having a thickness smaller than the thickness of the central region is provided at both ends in the width direction.
  • the end faces of the first and second shims 25, 26 are provided as shown in FIG. It may be slopes 25A, 26A.
  • coated active material layer 12 may become an acute angle.
  • a heating device is disposed in the vicinity of the corners of the thick part 12A and the thin part 12B of the active material layer 12 immediately after being applied, and the corners are dried and cured by a drying furnace. It may be cured prior to.
  • the shim provided in the die coater 20 is not limited to the above-described configuration, and may be configured as shown in FIG.
  • the stepped shim 27 has a shape in which the first shim 25 and the second shim 26 described above are integrated, and a thick portion 27 ⁇ / b> A that protrudes from both ends, and an inner side from the thick portion 27 ⁇ / b> A. And a thin-walled portion 27 ⁇ / b> B extending integrally with each other.
  • the thick part 27A sets the coating width of the width dimension including both the thin parts 12B of the active material layer 12, and the thin part 27B sets the thin part 12B and the thick part 12A of the active material layer 12 To do.
  • the stepped shim 27 can be formed by forming the thin portion 27B by cutting the shim material without thermally deforming it.
  • the width and thickness of the thin wall portion 12B and the thick wall portion 12A can be arbitrarily changed by simply replacing the shim. And it is not necessary to exchange die head 20A, 20B for every kind of electrode, and equipment cost can be reduced.
  • the shape of the slit 24 of the die coater 20 may be formed by making the tip lip shape of one die head 20B into a stepped shape as shown in FIG. 8 without using a shim as described above.
  • the die head 20B can be formed into a stepped shape by machining such as grinding.
  • the affixing unit 7 continuously affixes the protective tape 13 that functions as a spacer.
  • the protective tape 13 covers at least a part of the thin part 12B at both ends in the width direction of the coated and dried active material layer 12 and also covers a part of the uncoated region 11 connected to the outer side in the width direction of the thin part 12B.
  • a total of four protective tapes 13 are affixed, one on each side of one side of the electrode fabric 1 and one on each side of the other side.
  • the protective tape 13 has a width dimension of, for example, about 10 mm, preferably 7 mm, and has a thickness dimension of, for example, 20 ⁇ m to 80 ⁇ m, preferably 30 ⁇ m.
  • the material of the protective tape 13 may be any material that has excellent insulating properties, such as polyimide, polyester, polyvinylidene fluoride, and the like.
  • the affixing portion 7 follows the displacement in the width direction of the electrode fabric 1 and follows the protective tape 13 to stably affix.
  • an EPC device edge position control, abbreviation for Edge Position Control), which is a registered trademark of Nireco
  • a barrel-shaped crown roll is used as the sticking roller 30.
  • the crown-shaped (barrel-shaped) sticking roll 30 always concentrates tension on the center of the roll 30 from its shape. Accordingly, the traveling of the protective tape 13 is stabilized, the positional deviation of the protective tape 13 can be prevented, and the protective tape 13 can be always stuck at the target position.
  • FIG. 10 shows a state in which the protective tape 13 is pasted at the pasting unit 7.
  • the thickness of the protective tape 13 is thin, for example, 30 ⁇ m, and is smaller than the dimension of the step between the thin portion 12B and the thick portion 12A of the active material layer 12.
  • the step size between the thick portion 12A and the thin portion 12B is 70 to 90 ⁇ m.
  • the protective tape 13 having a thickness of 30 ⁇ m is sufficiently accommodated within the step size. For this reason, the protective tape 13 is affixed, without the surface of the protective tape 13 rising from the surface of the active material layer 12 which comprises the thick part 12A.
  • the thick portion 12A is compressed by 40 ⁇ m by the downstream press portion 8 and the step size is reduced to 30 to 50 ⁇ m, for example, the active material layer whose surface of the protective tape 13 constitutes the thick portion 12A It is possible to prevent swelling from the 12 surfaces.
  • the dimension of the step is not large and the protective tape 13 and the thin portion 12B are pressed by the rolling roll by compressing the thick portion 12A by compression at the press portion 8.
  • the surface of the protective tape 13 and the surface of the thick portion 12A are formed on the same surface by thinning the thin portion 12B. Therefore, the surface of the protective tape 13 can be prevented from rising from the surface of the active material layer 12 constituting the thick portion 12A.
  • the electrode fabric 1 with the protective tape 13 attached is conveyed to the press unit 8 and passes between the rolling rolls of the press unit 8. Thereby, the packing density of the active material layer 12 is increased and uniformized, and the electrode raw fabric 1 becomes a strip electrode.
  • the strip electrode is divided at the central portion in the width direction.
  • the divided strip-shaped electrode is cut into a predetermined length in the next step, so that an electrode plate can be formed by itself.
  • the pair of left and right portions (or the left and right portions) of the strip electrode divided by the slit portion 9 is wound around the winding roller 31 of the winding portion 10.
  • FIG. 12 shows that in the electrode manufacturing apparatus of the second example, the affixing part 7 is arranged downstream of the pressing part 8.
  • Other configurations are the same as those in the first example.
  • the electrode material 1 coated with the active material layer 12 in the coating parts 3 and 5 and dried in the drying parts 4 and 6 passes between the rolling rolls of the press part 8 and forms the thick part 12A. 12 is compressed and the packing density is increased and uniformized.
  • the affixing unit 7 continuously affixes the protective tape 13 that functions as a spacer.
  • the protective tape 13 covers at least a part of the unpressed thin part 12B of the electrode raw fabric 1 including the pressed active material layer 12 and a part of the uncoated region 11 connected to the outer side in the width direction of the thin part 12B. . Since the thin-walled portion 12B to which the protective tape 13 is applied has not been compressed by the press portion 8, the size of the step with respect to the thick-walled portion 12A compressed by the press portion 8 is reduced. For this reason, the dimension of the level
  • the thickness of the protective tape 13 is 30 ⁇ m and the active material layer 12 of the thick portion 12A is compressed from 123 ⁇ m to 80 ⁇ m by the press portion 8, it is formed by the coating portions 3 and 5.
  • the thickness dimension of the thin part 12B is 50 ⁇ m or less, the surface of the protective tape 13 can be prevented from rising from the surface of the thick part 12A.
  • the uncoated regions 11 where the active material extending in the longitudinal direction is not applied are provided at both ends in the width direction of the strip-shaped electrode raw fabric 1.
  • the uncoated region 11 where the active material extending in the longitudinal direction is not applied may be provided at one end portion in the width direction of the strip-shaped electrode raw fabric 1.
  • the electrode raw fabric 1 may be formed so that the uncoated area
  • region 11 may be provided in the width direction center part.
  • the electrode extends in the longitudinal direction at least at one end in the width direction of the strip-shaped electrode raw fabric 1 and is not coated with an active material, and the remainder in the width direction (that is, other than the uncoated area 11) Active material layer 12 in which the active material is continuously applied in the longitudinal direction.
  • the protective tape 13 as a spacer member which consists of an insulating material which straddled the boundary part of the uncoated area
  • the coating parts 3 and 5 of a manufacturing apparatus implement a coating process, the thickness of the active material layer 12 of the area
  • the active material is applied to the electrode fabric 1 so that the thickness of the active material layer 12 in this region becomes thin with a level difference.
  • the affixing unit 7 of the manufacturing apparatus performs a spacer arrangement process as a spacer arrangement unit and covers at least a part of the thin part 12B of the applied active material layer 12 and a part of the uncoated region 11 to form a spacer. Arrange the members.
  • the thickness of the active material layer 12 in the region where the spacer member adjacent to the uncoated region 11 of the active material layer 12 is arranged is different from the thickness of the thin portion 12B with respect to the thickness of the active material layer 12 in other regions. Become. For this reason, even if the protective tape 13 as a spacer is affixed, the thickness of both ends in the width direction of the electrode can be made equal to or less than that of the central portion, so that both ends in the width direction do not rise, Can be continuously wound. As a result, the protective tape 13 can be attached in-line, and the electrode manufacturing process can be simplified.
  • the coating units 3 and 5 apply the electrode slurry containing the active material to the electrode raw fabric 1 by the die coater 20 having a slit.
  • the slit has an opening dimension thinner at both ends in the width direction of the slit than at the center. For this reason, the active material layer 12 provided with the thin part 12B and the thick part 12A in the electrode raw fabric 1 can be formed continuously.
  • the shape of the slit of the die coater 20 was configured to face the opening of the shim 27 sandwiched between the die heads 20A and 20B. Only by replacing the shim 27, the width and thickness of the thin portion 12B and the thick portion 12A can be arbitrarily changed. There is no need to replace the die heads 20A and 20B for each type of electrode, and the equipment cost can be reduced.
  • the shim is a first shim 25 that sets a boundary region with the uncoated region 11 of the thin portion 12B of the active material layer 12, and the upper surface of the thin portion 12B and other regions that overlap the first shim 25 And a second shim 26 for setting the width of the active material layer 12. For this reason, by changing the combination of the first and second shims 25 and 26, the width and thickness of the thin portion 12B and the thick portion 12A can be arbitrarily changed. Therefore, it is not necessary to replace a dedicated shim for each type of electrode, and the equipment cost can be reduced. Further, since the shim is formed by overlapping simple flat shims 25 and 26, the shape can be formed with high accuracy, and the coating accuracy when used in the die heads 20A and 20B can be improved.
  • the end surfaces of the first and second shims 25, 26 are formed by the slopes 25A, 26A.
  • the corners of the thick part 12A and the thin part 12B of the applied active material layer 12 may be acute.
  • a heating device is disposed in the vicinity of the corners of the thick part 12A and the thin part 12B of the active material layer 12 immediately after being applied, and the corners are dried by a drying furnace. It may be cured prior to curing.
  • the spacer arrangement portion 7 covers at least a part of the dried active material layer 12 or the thin part 12B of the dried and pressed active material layer 12 and a part of the uncoated region 11 to form a spacer.
  • the protective tape 13 as a member is affixed. For this reason, the protective tape 13 as a spacer member is continuously pasted in-line continuously to at least a part of the thin portion 12B of the active material layer 12 of the electrode fabric 1 being conveyed and a part of the uncoated region 11. be able to.
  • the spacer arrangement portion 7 includes a guide roller 30 that presses the protective tape 13 against at least a part of the thin portion 12B of the active material layer 12 and a part of the uncoated region 11, and the guide roller 30 is a crown. Provided with a shaped surface. For this reason, the tension of the protective tape 13 can always be concentrated on the central portion of the roll 30 by the crown shape, and the traveling of the protective tape 13 can be stabilized. Therefore, the position shift of the protective tape 13 as a spacer can be prevented, and the protective tape 13 can be adhered to the target position with high accuracy.
  • FIG. 13 to 16 show a second embodiment of an electrode to which the present invention is applied, a method for manufacturing the electrode, and a manufacturing apparatus.
  • FIG. 13 is a schematic configuration diagram of an electrode manufacturing apparatus.
  • coats the insulating material which functions as a spacer to the upper surface of the thin part of an active material layer is added to 1st Embodiment.
  • the same devices as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted or simplified.
  • the electrode manufacturing apparatus is insulated by providing the coating portions 3 ⁇ / b> A and 5 ⁇ / b> A adjacent to the downstream of the die coater 20 to which the active material is applied, instead of being provided with the attaching portion of the protective tape 13.
  • a die coater 28 for applying the material 14 is provided.
  • Other configurations are the same as those of the first embodiment.
  • each slit 28 ⁇ / b> B has a thin portion 12 ⁇ / b> B of the active material layer 12 applied to the electrode fabric 1 by the preceding die coater 20 and an uncoated region 11 that continues to the outside in the width direction of the thin portion 12 ⁇ / b> B.
  • An opening is formed in a width region facing a part of the substrate.
  • the insulating material 14 is quantitatively supplied to the die coater 28 with high accuracy by a dispenser (liquid quantitative discharge device) or the like, and the thin portion 12B of the active material layer 12 and a part of the outer region in the width direction of the thin portion 12B (FIG. 15). In addition, it is applied wet-on-wet to a specified thickness.
  • the insulating material 14 is polyimide, polyester, polyvinylidene fluoride, or the like, and may be a resin material mixed with a filler such as alumina or talc in order to increase the insulating effect. Since the insulating material 14 has a composition different from that of the electrode slurry made of the active material, it does not mix with the active material even when applied wet-on-wet, and the protective layer made of the active material layer 12 and the insulating material 14. It exists separately.
  • FIG. 16 shows a state where the active material layer 12 and the protective layer made of the insulating material 14 are applied.
  • the electrode fabric 1 coated with the active material layer 12 and the insulating material 14 is dried by the drying unit 4 and then protected by the back surface coating unit 5 in the same manner as the active material layer 12 and the insulating material 14. A layer is applied. Then, the electrode raw material 1 coated with the active material layer 12 and the insulating material 14 is dried by the back surface drying unit 6, density-adjusted by the press unit 8, separated by the slit unit 9, and separated by the winding unit 10. It is wound up.
  • the protective layer can be more easily formed by applying the protective layer made of the insulating material 14 serving as a spacer to the thin portion 12B formed by the step and a part of the uncoated region 11.
  • the second die coater 28 is an insulation serving as a spacer member so as to cover at least a part of the thin part 12B of the active material layer 12 applied to the electrode fabric 1 and a part of the uncoated region 11.
  • the material 14 is applied.
  • insulating material 14 used as a spacer member can be arranged continuously, and equipment can be formed more inexpensively.
  • the insulating material 14 has a composition different from that of the electrode slurry made of the active material, it does not mix with the active material even when applied wet-on-wet, and is separated into the active material layer 12 and the protective layer. Can exist.

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  • Connection Of Batteries Or Terminals (AREA)

Abstract

L'invention concerne la fourniture d'une électrode favorable à la mise en œuvre de la tâche consistant à disposer un élément de bande fonctionnant comme une entretoise suite à l'application d'une couche de matériau actif ; un procédé de production correspondant ; et un dispositif de production de ladite électrode. La présente invention est dotée d'une zone non revêtue sur laquelle le matériau actif n'est pas appliqué, s'étendant dans le sens de la longueur jusqu'à au moins une extrémité dans le sens de la largeur d'un matériau de départ d'une électrode en forme de bande ; et d'une section revêtue sur laquelle le matériau actif est appliqué au matériau de départ de l'électrode, de sorte que l'épaisseur de la couche de matériau actif, sur laquelle l'élément de bande fonctionnant comme une entretoise est disposé et qui est la couche de matériau actif résultant de l'application en continu du matériau actif dans le sens de la longueur jusqu'au reste dans le sens de la largeur, soit mince, avec une différence de niveau relativement à la couche de matériau actif d'autres régions.
PCT/JP2013/057177 2012-03-14 2013-03-14 Électrode, procédé de production et dispositif de production correspondant WO2013137385A1 (fr)

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JP2012-057715 2012-03-14
JP2012057715A JP2015109135A (ja) 2012-03-14 2012-03-14 電極及びその製造方法並びに製造装置

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JP2016110707A (ja) * 2014-12-02 2016-06-20 トヨタ自動車株式会社 塗工装置
JP2017004608A (ja) * 2015-06-04 2017-01-05 株式会社Ｇｓユアサ 電極板、蓄電池、電極板の製造方法、及び位置測定方法
CN108480138A (zh) * 2018-05-29 2018-09-04 安徽力信能源科技有限责任公司 一种涂布均匀的挤压涂布机模头垫片及模头
US10355303B2 (en) 2015-08-27 2019-07-16 Samsung Sdi Co., Ltd. Electrode assembly, manufacturing method thereof, and rechargeable battery
CN114192346A (zh) * 2021-11-10 2022-03-18 湖北亿纬动力有限公司 涂布垫片及涂布模头
DE102022205657A1 (de) 2022-06-02 2023-12-07 Volkswagen Aktiengesellschaft Verfahren zur Fertigung einer Elektrode für eine Lithium-Ionen-Batteriezelle

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KR101719694B1 (ko) * 2016-01-18 2017-03-24 (주)피엔티 전극 활물질층의 엣지 코팅 장치 및 이를 이용한 이차전지용 전극 제조 방법
WO2017154312A1 (fr) * 2016-03-11 2017-09-14 Ｎｅｃエナジーデバイス株式会社 Procédé de fabrication d'électrode de dispositif électrochimique et dispositif électrochimique
KR102509516B1 (ko) * 2019-05-03 2023-03-13 주식회사 엘지에너지솔루션 전극조립체 및 그의 제조방법
WO2021176960A1 (fr) * 2020-03-06 2021-09-10 三洋電機株式会社 Batterie secondaire à électrolyte non aqueux et procédé de fabrication de batterie secondaire à électrolyte non aqueux

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CN107078271B (zh) * 2014-10-21 2020-01-03 远景Aesc能源元器件有限公司 用于二次电池的电极的制造方法及制造装置、用于二次电池的电极及二次电池
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WO2016063612A1 (fr) * 2014-10-21 2016-04-28 Ｎｅｃエナジーデバイス株式会社 Procédé et appareil de fabrication d'électrode pour batterie rechargeable, électrode pour batterie rechargeable, et batterie rechargeable
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JP2016110707A (ja) * 2014-12-02 2016-06-20 トヨタ自動車株式会社 塗工装置
JP2017004608A (ja) * 2015-06-04 2017-01-05 株式会社Ｇｓユアサ 電極板、蓄電池、電極板の製造方法、及び位置測定方法
US10355303B2 (en) 2015-08-27 2019-07-16 Samsung Sdi Co., Ltd. Electrode assembly, manufacturing method thereof, and rechargeable battery
EP3136466B1 (fr) * 2015-08-27 2024-02-14 Samsung SDI Co., Ltd. Procédé de fabrication d'ensemble d'électrode
CN108480138A (zh) * 2018-05-29 2018-09-04 安徽力信能源科技有限责任公司 一种涂布均匀的挤压涂布机模头垫片及模头
CN114192346A (zh) * 2021-11-10 2022-03-18 湖北亿纬动力有限公司 涂布垫片及涂布模头
CN114192346B (zh) * 2021-11-10 2023-10-31 湖北亿纬动力有限公司 涂布垫片及涂布模头
DE102022205657A1 (de) 2022-06-02 2023-12-07 Volkswagen Aktiengesellschaft Verfahren zur Fertigung einer Elektrode für eine Lithium-Ionen-Batteriezelle

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