JP2022107196A - Cutting method and cutter for band-like electrode sheet - Google Patents

Cutting method and cutter for band-like electrode sheet Download PDF

Info

Publication number
JP2022107196A
JP2022107196A JP2021001984A JP2021001984A JP2022107196A JP 2022107196 A JP2022107196 A JP 2022107196A JP 2021001984 A JP2021001984 A JP 2021001984A JP 2021001984 A JP2021001984 A JP 2021001984A JP 2022107196 A JP2022107196 A JP 2022107196A
Authority
JP
Japan
Prior art keywords
cutting
laminated portion
material laminated
strip
mixed material
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
JP2021001984A
Other languages
Japanese (ja)
Other versions
JP7179881B2 (en
Inventor
健一 柿下
Kenichi Kakishita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Prime Planet Energy and Solutions Inc
Original Assignee
Prime Planet Energy and Solutions Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Prime Planet Energy and Solutions Inc filed Critical Prime Planet Energy and Solutions Inc
Priority to JP2021001984A priority Critical patent/JP7179881B2/en
Publication of JP2022107196A publication Critical patent/JP2022107196A/en
Application granted granted Critical
Publication of JP7179881B2 publication Critical patent/JP7179881B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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

Landscapes

  • Details Of Cutting Devices (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

To provide a cutting method and cutter for band-like electrode sheet, capable of appropriately cutting a band-like electrode sheet in the width direction regardless of separately cutting a composite laminate part and a non-composite laminate part of the band-like electrode sheet by a different cutting system from each other.SOLUTION: A cutting method and cutter for band-like electrode sheet includes a first cutting process of cutting a composite laminate part 15 in a width direction DW by a score cut system, using a cutting blade 21 and a second cutting process of cutting a non-composite laminate part 16 in a width direction DW by a laser cutting system using the cutting blade 21 under such a condition where a positional relationship of a cutting portion of the composite laminate part 15 cut in the first cutting process to a longitudinal direction of the cutting blade 21 is maintained and cutting a band-like electrode sheet 10 in a width direction DW.SELECTED DRAWING: Figure 1

Description

本発明は、帯状電極シートの切断方法、及び、切断装置に関する。 The present invention relates to a method for cutting a strip-shaped electrode sheet and a cutting device.

特許文献１には、帯状電極シートの切断方法、及び、切断装置が開示されている。なお、帯状電極シートは、長手方向に延びる帯状の集電箔の表面に電極合材層が積層された合材積層部と、集電箔のうち、電極合材層が積層されることなく、合材積層部に対して長手方向に直交する幅方向に隣接する非合材積層部とを備える。具体的には、特許文献１では、まず、帯状電極シートの搬送方向の上流側に設けられたレーザ切断装置を用いて、帯状電極シートのうち厚みの薄い非合材積層部をレーザ切断する。その後、搬送方向の下流側に設けられた機械切断装置（ロータリーカッター）を用いて、帯状電極シートのうち厚みの厚い合材積層部を機械切断する。このように、特許文献１では、合材積層部と非合材積層部とを異なる切断方式で別々に切断する。 Patent Document 1 discloses a method for cutting a strip-shaped electrode sheet and a cutting device. The strip-shaped electrode sheet is formed by a mixture laminated portion in which an electrode mixture layer is laminated on the surface of a band-shaped current collector foil extending in the longitudinal direction, and a current collector foil in which the electrode mixture layer is not laminated. It is provided with a non-mixed material laminated portion adjacent to the mixed material laminated portion in the width direction orthogonal to the longitudinal direction. Specifically, in Patent Document 1, first, a laser cutting device provided on the upstream side in the transport direction of the strip-shaped electrode sheet is used to laser-cut a thin non-mixed material laminated portion of the strip-shaped electrode sheet. Then, using a mechanical cutting device (rotary cutter) provided on the downstream side in the transport direction, the thick composite material laminated portion of the strip-shaped electrode sheet is mechanically cut. As described above, in Patent Document 1, the mixed material laminated portion and the non-mixed material laminated portion are separately cut by different cutting methods.

特許第６６９０４８６号公報Japanese Patent No. 6690486

しかしながら、帯状電極シートの合材積層部と非合材積層部とを異なる切断方式で別々に幅方向に切断して、帯状電極シートを幅方向に切断する場合には、合材積層部の切断位置と非合材積層部の切断位置とについて、長手方向にかかる位置を一致させる（等しくする）ことが容易でなかった。このため、合材積層部と、これに対して幅方向に隣接する非合材積層部とについて、長手方向にかかる切断位置のズレなく、両者を切断することができないことがあった。このため、帯状電極シートを幅方向に適切に切断することができないことがあった。 However, when the mixed material laminated portion and the non-mixed material laminated portion of the strip-shaped electrode sheet are separately cut in the width direction by different cutting methods and the strip-shaped electrode sheet is cut in the width direction, the mixed material laminated portion is cut. It was not easy to match (equalize) the positions applied in the longitudinal direction with respect to the position and the cutting position of the non-mixed material laminated portion. For this reason, it may not be possible to cut the laminated material laminated portion and the non-mixed material laminated portion adjacent to the laminated material laminated portion in the width direction without a deviation in the cutting position in the longitudinal direction. Therefore, it may not be possible to properly cut the strip-shaped electrode sheet in the width direction.

本発明は、かかる現状に鑑みてなされたものであって、帯状電極シートの合材積層部と非合材積層部とを異なる切断方式で別々に切断するにも拘わらず、帯状電極シートを幅方向に適切に切断することができる帯状電極シートの切断方法、及び、切断装置を提供することを目的とする。 The present invention has been made in view of the present situation, and the width of the strip-shaped electrode sheet is widened even though the laminated material laminated portion and the non-mixed material laminated portion of the strip-shaped electrode sheet are separately cut by different cutting methods. An object of the present invention is to provide a method for cutting a strip-shaped electrode sheet that can be appropriately cut in a direction, and a cutting device.

本発明の一態様は、長手方向に延びる帯状の集電箔の表面に電極合材層が積層された合材積層部と、前記集電箔のうち、前記電極合材層が積層されることなく、前記合材積層部に対して前記長手方向に直交する幅方向に隣接する非合材積層部と、を備える帯状電極シートを、前記幅方向に切断する方法において、切断刃によって前記合材積層部をスコアカット方式で前記幅方向に切断する第１切断工程と、前記第１切断工程で切断した前記合材積層部の切断部位と前記切断刃との前記長手方向にかかる位置関係を維持した状態で、当該切断刃によって、前記非合材積層部をレザーカット方式で前記幅方向に切断して、前記帯状電極シートを前記幅方向に切断する第２切断工程と、を備える帯状電極シートの切断方法である。 One aspect of the present invention is that the electrode mixture layer is laminated on the surface of the strip-shaped current collector foil extending in the longitudinal direction, and the electrode mixture layer of the current collector foil is laminated. In a method of cutting a strip-shaped electrode sheet including a non-mixed material laminated portion adjacent to the mixed material laminated portion in the width direction orthogonal to the longitudinal direction in the width direction, the mixed material is used by a cutting blade. Maintaining the positional relationship between the first cutting step of cutting the laminated portion in the width direction by the score cut method and the cutting portion of the mixed material laminated portion cut in the first cutting step and the cutting blade in the longitudinal direction. In this state, the strip-shaped electrode sheet comprises a second cutting step of cutting the non-mixed material laminated portion in the width direction by the cutting blade by the leather cutting method and cutting the strip-shaped electrode sheet in the width direction. It is a cutting method of.

上述の切断方法では、まず、第１切断工程において、切断刃によって、帯状電極シートのうち合材積層部をスコアカット方式（押し切り方式）で幅方向に切断する。なお、切断刃は、例えば、帯状電極シートの幅方向に延びる切断刃であって、帯状電極シートの幅寸法（幅方向の寸法）と同等以上の長さを有し、帯状電極シートの幅方向の全体にわたって帯状電極シートに対向して設けられた切断刃である。 In the above-mentioned cutting method, first, in the first cutting step, the laminated material laminated portion of the strip-shaped electrode sheet is cut in the width direction by a score cut method (push-cut method) by a cutting blade. The cutting blade is, for example, a cutting blade extending in the width direction of the strip-shaped electrode sheet, having a length equal to or longer than the width dimension (dimension in the width direction) of the strip-shaped electrode sheet, and in the width direction of the strip-shaped electrode sheet. It is a cutting blade provided so as to face the strip-shaped electrode sheet over the entire surface.

その後、第２切断工程において、第１切断工程で切断した合材積層部の切断部位と切断刃とについて、帯状電極シートの長手方向にかかる位置関係を維持した状態で、当該切断刃によって、非合材積層部をレザーカット方式（溝切り方式）で幅方向に切断する。すなわち、帯状電極シートの長手方向にかかる切断刃の位置を、第１切断工程で合材積層部を切断した位置に維持した状態で、当該切断刃によって、非合材積層部をレザーカット方式で幅方向に切断する。これにより、帯状電極シートを幅方向に切断する。 After that, in the second cutting step, the cutting site of the composite material laminated portion cut in the first cutting step and the cutting blade are not subjected to the cutting blade while maintaining the positional relationship in the longitudinal direction of the strip-shaped electrode sheet. The laminated material is cut in the width direction by a leather cutting method (grooving method). That is, while the position of the cutting blade in the longitudinal direction of the strip-shaped electrode sheet is maintained at the position where the composite material laminated portion was cut in the first cutting step, the non-mixed material laminated portion is cut by the leather cutting method by the cutting blade. Cut in the width direction. As a result, the strip-shaped electrode sheet is cut in the width direction.

上述の切断方法では、帯状電極シートのうち、厚みの厚い合材積層部をスコアカット方式（押し切り方式）で切断し、厚みの薄い非合材積層部をレザーカット方式（溝切り方式）で切断するので、合材積層部と非合材積層部とを適切に切断することができる。 In the above-mentioned cutting method, the thick composite material laminated portion of the strip-shaped electrode sheet is cut by the score cut method (push-cut method), and the thin non-mixed material laminated portion is cut by the leather cut method (grooving method). Therefore, the laminated material laminated portion and the non-mixed material laminated portion can be appropriately cut.

さらに、第２切断工程では、第１切断工程で切断した合材積層部の切断部位と切断刃とについて、帯状電極シートの長手方向にかかる位置関係を維持した状態で、第１切断工程で用いた切断刃によって、非合材積層部を幅方向に切断する。このため、合材積層部の切断位置と非合材積層部の切断位置とについて、長手方向にかかる位置を一致させる（等しくする）ことができる。すなわち、合材積層部と、これに対して幅方向に隣接する非合材積層部とについて、長手方向にかかる切断位置のズレなく、両者を切断することができる。これにより、合材積層部と非合材積層部とを異なる切断方式で別々に切断するにも拘わらず、帯状電極シートを幅方向に適切に（真っ直ぐ）切断することができる。 Further, in the second cutting step, it is used in the first cutting step while maintaining the positional relationship between the cutting portion of the composite material laminated portion cut in the first cutting step and the cutting blade in the longitudinal direction of the strip-shaped electrode sheet. The non-mixed material laminated portion is cut in the width direction by the cutting blade. Therefore, it is possible to match (equalize) the cut positions of the laminated material laminated portion with the cut positions of the non-mixed material laminated portion in the longitudinal direction. That is, it is possible to cut both the laminated material laminated portion and the non-mixed material laminated portion adjacent to the laminated material laminated portion in the width direction without any deviation of the cutting position in the longitudinal direction. As a result, the strip-shaped electrode sheet can be appropriately (straight) cut in the width direction even though the mixed material laminated portion and the non-mixed material laminated portion are separately cut by different cutting methods.

本発明の他の態様は、長手方向に延びる帯状の集電箔の表面に電極合材層が積層された合材積層部と、前記集電箔のうち、前記電極合材層が積層されることなく、前記合材積層部に対して前記長手方向に直交する幅方向に隣接する非合材積層部と、を備える帯状電極シートを、前記幅方向に切断する切断装置において、周方向に回転して前記帯状電極シートを前記長手方向に沿った搬送方向に搬送する搬送ロールであって、当該搬送ロールの軸線方向に延びる切断刃を当該搬送ロールの外周面側に有し、前記帯状電極シートを、当該搬送ロールの前記外周面に巻き付けるようにして搬送する搬送ロールと、前記搬送ロールの回転に伴って前記帯状電極シートと共に前記周方向に移動する前記切断刃が、前記搬送ロールの第１周方向位置に達するときに、前記合材積層部のうち前記切断刃に対して前記搬送ロールの径方向の外側に位置する部位を、前記径方向の内側に位置する前記切断刃に押しつけて、スコアカット方式で前記合材積層部を前記幅方向に切断させる第１アンビルと、前記合材積層部を切断した前記切断刃が、前記搬送ロールの回転に伴って前記合材積層部の切断部位と共に前記搬送ロールの第２周方向位置に達するときに、前記非合材積層部のうち前記切断刃に対して前記搬送ロールの径方向の外側に位置する部位を、前記径方向の内側に位置する前記切断刃に押しつけて、レザーカット方式で前記非合材積層部を前記幅方向に切断させる第２アンビルと、を備える切断装置である。 In another aspect of the present invention, the electrode mixture layer is laminated on the surface of the strip-shaped current collector foil extending in the longitudinal direction, and the electrode mixture layer of the current collector foil is laminated. In a cutting device for cutting a strip-shaped electrode sheet including a non-mixed material laminated portion adjacent to the mixed material laminated portion in the width direction orthogonal to the longitudinal direction, the strip-shaped electrode sheet is rotated in the circumferential direction. A transport roll for transporting the strip-shaped electrode sheet in the transport direction along the longitudinal direction, the strip-shaped electrode sheet having a cutting blade extending in the axial direction of the transport roll on the outer peripheral surface side of the transport roll. The first of the transport rolls is a transport roll that is wound around the outer peripheral surface of the transport roll, and a cutting blade that moves in the circumferential direction together with the strip-shaped electrode sheet as the transport roll rotates. When the circumferential position is reached, a portion of the composite material laminated portion located outside the transport roll in the radial direction with respect to the cutting blade is pressed against the cutting blade located inside the radial direction. The first anvil that cuts the mixed material laminated portion in the width direction by the score cut method and the cutting blade that cuts the mixed material laminated portion are the cutting portions of the mixed material laminated portion as the transport roll rotates. At the same time, when the position in the second circumferential direction of the transport roll is reached, the portion of the non-mixed material laminated portion located on the outer side in the radial direction of the transport roll with respect to the cutting blade is positioned on the inner side in the radial direction. It is a cutting device including a second anvil that is pressed against the cutting blade to cut the non-mixed material laminated portion in the width direction by a leather cutting method.

上述の切断装置は、周方向に回転して帯状電極シートを長手方向に沿った搬送方向に搬送する搬送ロールを備える。この搬送ロールは、帯状電極シートを、当該搬送ロールの外周面に巻き付けるようにして搬送する。さらに、この搬送ロールは、当該搬送ロールの軸線方向（搬送ロールによって搬送される帯状電極シートの幅方向に一致する方向）に延びる切断刃を当該搬送ロールの外周面側に有する。この切断刃は、例えば、帯状電極シートの幅寸法（幅方向の寸法）と同等以上の長さを有し、帯状電極シートの幅方向の全体にわたって、搬送ロールによって搬送される帯状電極シートに対向するように設けられた切断刃である。この切断刃は、例えば、円筒状の外周面から径方向に凹んだ溝部に固定された態様で搬送ロールに設けられている。この切断刃は、搬送ロールの回転に伴って帯状電極シートと共に周方向に移動する。 The cutting device described above includes a transport roll that rotates in the circumferential direction and transports the strip-shaped electrode sheet in the transport direction along the longitudinal direction. This transport roll transports the strip-shaped electrode sheet so as to be wound around the outer peripheral surface of the transport roll. Further, the transfer roll has a cutting blade extending in the axial direction of the transfer roll (direction corresponding to the width direction of the strip-shaped electrode sheet conveyed by the transfer roll) on the outer peripheral surface side of the transfer roll. This cutting blade has, for example, a length equal to or longer than the width dimension (dimension in the width direction) of the strip-shaped electrode sheet, and faces the strip-shaped electrode sheet transported by the transport roll over the entire width direction of the strip-shaped electrode sheet. It is a cutting blade provided so as to do so. This cutting blade is provided on the transport roll, for example, in a manner of being fixed to a groove portion recessed in the radial direction from the cylindrical outer peripheral surface. This cutting blade moves in the circumferential direction together with the strip-shaped electrode sheet as the transport roll rotates.

さらに、上述の切断装置は、第１アンビルを備える。この第１アンビルは、搬送ロールの回転に伴って帯状電極シートと共に周方向に移動する前記切断刃が、搬送ロールの第１周方向位置に達するときに、帯状電極シートの合材積層部のうち切断刃に対して搬送ロールの径方向の外側に位置する部位を径方向の内側に位置する切断刃に押しつけて、スコアカット方式（押し切り方式）で合材積層部を幅方向に切断させる。 Further, the cutting device described above includes a first anvil. The first anvil is one of the laminated parts of the strip-shaped electrode sheet when the cutting blade, which moves in the circumferential direction together with the strip-shaped electrode sheet as the transport roll rotates, reaches the position in the first circumferential direction of the transport roll. A portion located on the outer side of the transport roll in the radial direction is pressed against the cutting blade located on the inner side in the radial direction with respect to the cutting blade, and the composite material laminated portion is cut in the width direction by a score cut method (push cut method).

これにより、搬送ロールの回転によって搬送ロールの外周面に沿って搬送されている帯状電極シートと共に周方向に移動する切断刃が搬送ロールの第１周方向位置に達したときに、当該切断刃と第１アンビルとによって、搬送ロールの外周面に沿って搬送されている帯状電極シートのうち合材積層部を、スコアカット方式（押し切り方式）で幅方向に切断することができる。 As a result, when the cutting blade that moves in the circumferential direction together with the strip-shaped electrode sheet transported along the outer peripheral surface of the transport roll due to the rotation of the transport roll reaches the position in the first circumferential direction of the transport roll, the cutting blade and the cutting blade are contacted. With the first anvil, the laminated material laminated portion of the strip-shaped electrode sheet transported along the outer peripheral surface of the transport roll can be cut in the width direction by a score cut method (push-cut method).

さらに、上述の切断装置は、第２アンビルを備える。この第２アンビルは、合材積層部を切断した切断刃が、搬送ロールの回転に伴って合材積層部の切断部位と共に搬送ロールの第２周方向位置（前記第１周方向位置よりも搬送方向の下流側の位置）に達するときに、非合材積層部のうち当該切断刃に対して搬送ロールの径方向の外側に位置する部位（第１周方向位置で切断された合材積層部の切断部位に対して、帯状電極シートの幅方向に隣接する部位である）を、径方向の内側に位置する切断刃に押しつけて、レザーカット方式（溝切り方式）で非合材積層部を幅方向に切断させる。これにより、帯状電極シートが幅方向に切断される。 Further, the cutting device described above includes a second anvil. In this second anvil, the cutting blade that cuts the laminated material laminated portion conveys the cutting portion of the laminated material laminated portion together with the cut portion of the mixed material laminated portion in the second circumferential direction position of the conveying roll (more than the first circumferential position). When reaching the position on the downstream side in the direction), the portion of the non-mixed material laminated portion located outside the radial direction of the transport roll with respect to the cutting blade (mixed material laminated portion cut at the first circumferential position). (A part adjacent to the cutting part in the width direction of the strip-shaped electrode sheet) is pressed against the cutting blade located inside in the radial direction, and the non-mixed material laminated part is formed by the leather cutting method (grooving method). Cut in the width direction. As a result, the strip-shaped electrode sheet is cut in the width direction.

従って、上述の切断装置では、第１周方向位置で切断された合材積層部の切断部位と切断刃とについて、帯状電極シートの長手方向にかかる位置関係を維持した状態で、搬送ロールの第１周方向位置よりも搬送方向の下流側の第２周方向位置において、切断刃と第２アンビルとによって、非合材積層部をレザーカット方式（溝切り方式）で幅方向に切断することができる。すなわち、帯状電極シートの長手方向にかかる切断刃の位置を、合材積層部を切断した位置に維持した状態で、当該切断刃によって、非合材積層部をレザーカット方式で切断することができる。第１周方向位置で切断された合材積層部の切断部位と切断刃とは、帯状電極シートの長手方向にかかる互いの位置関係を変えることなく、第１周方向位置から第２周方向位置まで移動するからである。 Therefore, in the above-mentioned cutting device, the first of the transport rolls is in a state where the cutting portion of the composite material laminated portion cut at the position in the first circumferential direction and the cutting blade maintain the positional relationship in the longitudinal direction of the strip-shaped electrode sheet. At the position in the second circumferential direction on the downstream side of the transport direction from the position in the first circumferential direction, the non-mixed material laminated portion can be cut in the width direction by the leather cutting method (grooving method) by the cutting blade and the second anvil. can. That is, while the position of the cutting blade in the longitudinal direction of the strip-shaped electrode sheet is maintained at the position where the composite material laminated portion is cut, the non-mixed material laminated portion can be cut by the leather cutting method by the cutting blade. .. The cutting portion of the composite material laminated portion cut at the position in the first circumferential direction and the cutting blade are positioned from the position in the first circumferential direction to the position in the second circumferential direction without changing the positional relationship between the strip-shaped electrode sheets in the longitudinal direction. Because it moves to.

このため、合材積層部の切断位置と非合材積層部の切断位置とについて、長手方向にかかる位置を一致させる（等しくする）ことができる。すなわち、合材積層部と、これに対して幅方向に隣接する非合材積層部とについて、長手方向にかかる切断位置のズレなく、両者を切断することができる。これにより、合材積層部と非合材積層部とを異なる切断方式で別々に切断するにも拘わらず、帯状電極シートを幅方向に適切に（真っ直ぐ）切断することができる。 Therefore, it is possible to match (equalize) the cut positions of the laminated material laminated portion with the cut positions of the non-mixed material laminated portion in the longitudinal direction. That is, it is possible to cut both the laminated material laminated portion and the non-mixed material laminated portion adjacent to the laminated material laminated portion in the width direction without any deviation of the cutting position in the longitudinal direction. As a result, the strip-shaped electrode sheet can be appropriately (straight) cut in the width direction even though the mixed material laminated portion and the non-mixed material laminated portion are separately cut by different cutting methods.

なお、上述の切断装置では、帯状電極シートのうち、厚みの厚い合材積層部をスコアカット方式（押し切り方式）で切断し、厚みの薄い非合材積層部をレザーカット方式（溝切り方式）で切断するので、合材積層部と非合材積層部とを適切に切断することができる。 In the above-mentioned cutting device, among the strip-shaped electrode sheets, the thick composite material laminated portion is cut by the score cut method (push-cut method), and the thin non-mixed material laminated portion is cut by the leather cut method (grooving method). Since it is cut with, the mixed material laminated portion and the non-mixed material laminated portion can be appropriately cut.

実施形態にかかる切断装置の概略図である。It is the schematic of the cutting apparatus which concerns on embodiment. 帯状電極シートの平面図である。It is a top view of the strip-shaped electrode sheet. 図２のＢ－Ｂ断面図である。FIG. 2 is a cross-sectional view taken along the line BB of FIG. 図１のＣ部拡大図であって、第１切断工程を説明する図である。It is the C part enlarged view of FIG. 1, and is the figure explaining the 1st cutting process. 第１切断工程を説明する他の図である。It is another figure explaining the 1st cutting process. 図１のＤ部拡大図である。It is an enlarged view of D part of FIG. 第２切断工程を説明する図である。It is a figure explaining the 2nd cutting process. 実施形態にかかる帯状電極シートの切断方法を説明する図である。It is a figure explaining the cutting method of the strip-shaped electrode sheet which concerns on embodiment.

以下、本発明を具体化した実施形態について、図面を参照しつつ詳細に説明する。本実施形態では、図１に示す切断装置１を用いて、帯状電極シート１０を幅方向ＤＷに切断する。帯状電極シート１０は、図２及び図３に示すように、合材積層部１５と非合材積層部１６とからなる。合材積層部１５は、長手方向ＤＬ（図２において左右方向）に延びる帯状の集電箔１１の表面（両面）に電極合材層１２が積層された部位である。一方、非合材積層部１６は、集電箔１１のうち、電極合材層１２が積層されることなく、合材積層部１５に対して長手方向ＤＬに直交する幅方向ＤＷ（図２において上下方向、図３において左右方向）に隣接する部位である。集電箔１１は、例えば、アルミニウム箔や銅箔である。電極合材層１２は、例えば、活物質粒子やバインダを含む層である。 Hereinafter, embodiments embodying the present invention will be described in detail with reference to the drawings. In the present embodiment, the strip-shaped electrode sheet 10 is cut in the width direction DW by using the cutting device 1 shown in FIG. As shown in FIGS. 2 and 3, the strip-shaped electrode sheet 10 includes a composite material laminated portion 15 and a non-mixed material laminated portion 16. The mixture laminated material 15 is a portion where the electrode mixture layer 12 is laminated on the surface (both sides) of the band-shaped current collector foil 11 extending in the longitudinal direction DL (left-right direction in FIG. 2). On the other hand, the non-mixed material laminated portion 16 has a width direction DW (in FIG. 2) that is orthogonal to the longitudinal direction DL with respect to the mixed material laminated portion 15 without laminating the electrode mixed material layer 12 in the current collecting foil 11. It is a portion adjacent to the vertical direction (horizontal direction in FIG. 3). The current collector foil 11 is, for example, an aluminum foil or a copper foil. The electrode mixture layer 12 is, for example, a layer containing active material particles and binder.

本実施形態の切断装置１は、帯状電極シート１０を幅方向ＤＷに切断して、複数の短冊状の電極シート１８を作製する（図１参照）。電極シート１８は、例えば、リチウムイオン二次電池の正極または負極として使用される。この切断装置１は、図１に示すように、搬送ロール２０と、第１アンビル付きロール３０と、第２アンビル付きロール４０と、ニップロール５０と、収容ケース７０とを備える。搬送ロール２０は、周方向に（図１において時計回りに）回転して、帯状電極シート１０を長手方向ＤＬに沿った搬送方向ＤＭに搬送する。この搬送ロール２０は、帯状電極シート１０を、当該搬送ロール２０の外周面２０ｂに巻き付けるようにして搬送する。 The cutting device 1 of the present embodiment cuts the strip-shaped electrode sheet 10 in the width direction DW to produce a plurality of strip-shaped electrode sheets 18 (see FIG. 1). The electrode sheet 18 is used, for example, as a positive electrode or a negative electrode of a lithium ion secondary battery. As shown in FIG. 1, the cutting device 1 includes a transport roll 20, a roll 30 with a first anvil, a roll 40 with a second anvil, a nip roll 50, and a storage case 70. The transport roll 20 rotates in the circumferential direction (clockwise in FIG. 1) to transport the strip-shaped electrode sheet 10 in the transport direction DM along the longitudinal direction DL. The transport roll 20 transports the strip-shaped electrode sheet 10 so as to be wound around the outer peripheral surface 20b of the transport roll 20.

さらに、この搬送ロール２０は、当該搬送ロール２０の軸線方向（軸線ＡＸが延びる方向、図１において紙面に直交する方向）に延びる切断刃２１を、当該搬送ロール２０の外周面２０ｂ側に有する。なお、搬送ロール２０の軸線方向は、搬送ロール２０の外周面２０ｂに巻き付けられて搬送されている帯状電極シート１０の幅方向ＤＷに一致する。この切断刃２１は、帯状電極シート１０の幅寸法Ｗ（幅方向ＤＷの寸法、図２参照）と同等以上の長さを有し、搬送ロール２０の外周面２０ｂに巻き付けられて搬送される帯状電極シート１０に対し、その幅方向ＤＷの全体にわたって対向するように設けられている。 Further, the transport roll 20 has a cutting blade 21 extending in the axial direction of the transport roll 20 (the direction in which the axis AX extends, the direction orthogonal to the paper surface in FIG. 1) on the outer peripheral surface 20b side of the transport roll 20. The axial direction of the transport roll 20 coincides with the width direction DW of the strip-shaped electrode sheet 10 wound around the outer peripheral surface 20b of the transport roll 20 and transported. The cutting blade 21 has a length equal to or longer than the width dimension W (dimension of DW in the width direction, see FIG. 2) of the strip-shaped electrode sheet 10, and is wrapped around the outer peripheral surface 20b of the transport roll 20 and transported. It is provided so as to face the electrode sheet 10 over the entire width direction DW thereof.

具体的には、切断刃２１は、搬送ロール２０の円筒状の外周面２０ｂから径方向内側に凹んだ溝部２３の底部２３ｂに固定されると共に、刃先２１ｂを径方向外側に向けた態様で、搬送ロール２０に設けられている（図４～図７参照）。この切断刃２１は、断面三角形状をなして搬送ロール２０の軸線方向（図４において紙面に直交する方向）に延びる形態を有している。この切断刃２１は、搬送ロール２０の回転に伴って帯状電極シート１０と共に周方向に移動する。 Specifically, the cutting blade 21 is fixed to the bottom portion 23b of the groove portion 23 that is recessed inward in the radial direction from the cylindrical outer peripheral surface 20b of the transport roll 20, and the cutting edge 21b is oriented radially outward. It is provided on the transport roll 20 (see FIGS. 4 to 7). The cutting blade 21 has a triangular cross section and extends in the axial direction of the transport roll 20 (the direction orthogonal to the paper surface in FIG. 4). The cutting blade 21 moves in the circumferential direction together with the strip-shaped electrode sheet 10 as the transport roll 20 rotates.

なお、搬送ロール２０は、中空円筒形状のサクションロールであり、外周面２０ｂを構成する円筒形状の壁部に多数の貫通孔２０ｄが形成されている（図１参照）。この搬送ロール２０には、搬送ロール２０の内部空間の空気を吸引する吸引装置（図示なし）が接続されている。この吸引装置によって搬送ロール２０内の空気が吸引されることによって、搬送ロール２０の外周面２０ｂに巻き付けられている帯状電極シート１０が、搬送ロール２０の貫通孔２０ｄを通じて搬送ロール２０の中心側に吸引される力を受ける。これにより、搬送ロール２０の外周面２０ｂに巻き付けられた帯状電極シート１０は、搬送ロール２０の外周面２０ｂに吸着されながら、搬送ロール２０の外周面２０ｂに沿って搬送される。 The transport roll 20 is a hollow cylindrical suction roll, and a large number of through holes 20d are formed in the cylindrical wall portion forming the outer peripheral surface 20b (see FIG. 1). A suction device (not shown) for sucking air in the internal space of the transport roll 20 is connected to the transport roll 20. By sucking the air in the transport roll 20 by this suction device, the strip-shaped electrode sheet 10 wound around the outer peripheral surface 20b of the transport roll 20 is moved to the center side of the transport roll 20 through the through hole 20d of the transport roll 20. Receives the force of being sucked. As a result, the strip-shaped electrode sheet 10 wound around the outer peripheral surface 20b of the transport roll 20 is transported along the outer peripheral surface 20b of the transport roll 20 while being attracted to the outer peripheral surface 20b of the transport roll 20.

また、搬送ロール２０には、外周面２０ｂから径方向内側に凹んだ溝部２３が、搬送ロール２０の周方向に等間隔で４つ形成されている（図１参照）。各々の溝部２３の底部２３ｂには、前述の切断刃２１が固定されている。従って、搬送ロール２０には、４つの切断刃２１が、搬送ロール２０の周方向に等間隔で設けられている。換言すれば、搬送ロール２０には、４つの切断刃２１が、軸線ＡＸの周りに９０°ずつ位置をずらして配置されている。なお、切断刃２１の先端（刃先２１ｂの先端）は、溝部２３内に（例えば、外周面２０ｂと同等の径方向位置に）配置されている。 Further, the transport roll 20 is formed with four groove portions 23 recessed inward in the radial direction from the outer peripheral surface 20b at equal intervals in the circumferential direction of the transport roll 20 (see FIG. 1). The above-mentioned cutting blade 21 is fixed to the bottom portion 23b of each groove portion 23. Therefore, the transport roll 20 is provided with four cutting blades 21 at equal intervals in the circumferential direction of the transport roll 20. In other words, on the transport roll 20, four cutting blades 21 are arranged so as to be offset by 90 ° around the axis AX. The tip of the cutting blade 21 (the tip of the cutting edge 21b) is arranged in the groove 23 (for example, at a radial position equivalent to the outer peripheral surface 20b).

第１アンビル付きロール３０は、円柱状の第１ロール３２と、第１ロール３２に固定された第１アンビル３１とを有する（図１及び図４参照）。第１アンビル３１は、第１ロール３２の外周面３２ｂから径方向外側に突出する態様で、第１ロール３２に設けられている。この第１アンビル付きロール３０は、搬送ロール２０と平行に設けられている。詳細には、第１アンビル付きロール３０は、第１ロール３２の外周面３２ｂが、搬送ロール２０の第１周方向位置Ｐ１において搬送ロール２０の外周面２０ｂと対向（対面）するように設けられている（図１参照）。 The roll 30 with the first anvil has a columnar first roll 32 and a first anvil 31 fixed to the first roll 32 (see FIGS. 1 and 4). The first anvil 31 is provided on the first roll 32 in a manner in which the first anvil 31 projects radially outward from the outer peripheral surface 32b of the first roll 32. The roll 30 with the first anvil is provided in parallel with the transport roll 20. Specifically, the roll 30 with the first anvil is provided so that the outer peripheral surface 32b of the first roll 32 faces (faces) the outer peripheral surface 20b of the transport roll 20 at the position P1 in the first circumferential direction of the transport roll 20. (See Fig. 1).

なお、第１周方向位置Ｐ１は、搬送ロール２０の外周面２０ｂへの帯状電極シート１０の巻き付け開始位置ＰＳ（搬送ロール２０の外周面２０ｂとニップロール５０の外周面とが対向する位置）よりも搬送方向ＤＭの下流側に位置している。詳細には、第１周方向位置Ｐ１は、搬送ロール２０の軸線ＡＸの周りに、巻き付け開始位置ＰＳから搬送方向ＤＭの下流側に第１角度θ１（本実施形態では４５°）だけ移動した位置である（図１参照）。 The first circumferential position P1 is higher than the winding start position PS of the strip-shaped electrode sheet 10 around the outer peripheral surface 20b of the transport roll 20 (the position where the outer peripheral surface 20b of the transport roll 20 and the outer peripheral surface of the nip roll 50 face each other). It is located on the downstream side of the transport direction DM. Specifically, the position P1 in the first circumferential direction is a position moved around the axis AX of the transport roll 20 by a first angle θ1 (45 ° in this embodiment) from the winding start position PS to the downstream side of the transport direction DM. (See FIG. 1).

また、第１アンビル付きロール３０は、搬送ロール２０が周方向に１／４回転したときに、自身が周方向に１回転する。すなわち、第１アンビル付きロール３０は、搬送ロール２０が周方向に１回転したときに、自身が周方向に４回転する。そして、搬送ロール２０の各々の切断刃２１が搬送ロール２０の第１周方向位置Ｐ１に達したときに、第１アンビル３１が第１周方向位置Ｐ１に達した切断刃２１（刃先２１ｂ）と径方向に対向するように、搬送ロール２０と第１アンビル付きロール３０とが設けられている（図１及び図４参照）。 Further, when the transport roll 20 rotates 1/4 in the circumferential direction, the roll 30 with the first anvil makes one rotation in the circumferential direction. That is, when the transport roll 20 makes one rotation in the circumferential direction, the roll 30 with the first anvil makes four rotations in the circumferential direction. Then, when each of the cutting blades 21 of the transport roll 20 reaches the first circumferential position P1 of the transport roll 20, the first anvil 31 reaches the first circumferential position P1 with the cutting blade 21 (blade edge 21b). A transport roll 20 and a roll 30 with a first anvil are provided so as to face each other in the radial direction (see FIGS. 1 and 4).

従って、搬送ロール２０の回転に伴って、巻き付け開始位置ＰＳから帯状電極シート１０と共に周方向に移動する切断刃２１が、搬送ロール２０の第１周方向位置Ｐ１に達するとき、第１アンビル付きロール３０の第１アンビル３１によって、帯状電極シート１０の合材積層部１５のうち切断刃２１に対して搬送ロール２０の径方向の外側に位置する部位（切断刃対向部１５ｃとする）を、径方向の内側に位置する切断刃２１に押しつけて、スコアカット方式（押し切り方式）で合材積層部１５を幅方向ＤＷに切断することができる（図４参照）。 Therefore, when the cutting blade 21 that moves in the circumferential direction together with the strip-shaped electrode sheet 10 from the winding start position PS with the rotation of the transport roll 20 reaches the first circumferential position P1 of the transport roll 20, the roll with the first anvil. By the first anvil 31 of 30, the portion of the composite material laminated portion 15 of the strip-shaped electrode sheet 10 located outside the transport roll 20 in the radial direction with respect to the cutting blade 21 (referred to as the cutting blade facing portion 15c) has a diameter. By pressing against the cutting blade 21 located inside the direction, the composite material laminated portion 15 can be cut in the width direction DW by the score cut method (push cut method) (see FIG. 4).

このとき、帯状電極シート１０の非合材積層部１６が切断刃２１に接触しないようにして、切断刃２１によって非合材積層部１６が切断されないようにしている。具体的には、第１アンビル３１と切断刃２１とが最接近する位置（両者の間隙が最小となる位置）において、両者の間隙が、非合材積層部１６（集電箔１１）の厚みよりも大きく、且つ、電極合材層１２の厚みよりも小さくなるように、切断刃２１と第１アンビル３１とが設けられている（図４及び図５参照）。これにより、スコアカット方式（押し切り方式）によって合材積層部１５を切断しつつも、スコアカット方式（押し切り方式）によって非合材積層部１６が切断されないようにしている。なお、図４及び図５は、切断刃２１が第１周方向位置Ｐ１に達したときの切断装置１の拡大断面図（搬送ロール２０の軸線方向に直交する方向に切断した拡大断面図）であり、このうち図４は、合材積層部１５の断面が現れる位置における断面図であり、図５は、非合材積層部１６の断面が現れる位置における断面図である。 At this time, the non-mixed material laminated portion 16 of the strip-shaped electrode sheet 10 is prevented from coming into contact with the cutting blade 21, so that the non-mixed material laminated portion 16 is not cut by the cutting blade 21. Specifically, at the position where the first anvil 31 and the cutting blade 21 are closest to each other (the position where the gap between the two is minimized), the gap between the two is the thickness of the non-mixed material laminated portion 16 (current collector foil 11). The cutting blade 21 and the first anvil 31 are provided so as to be larger and smaller than the thickness of the electrode mixture layer 12 (see FIGS. 4 and 5). As a result, the mixed material laminated portion 15 is cut by the score cut method (push-cutting method), but the non-mixed material laminated portion 16 is not cut by the score-cutting method (push-cutting method). 4 and 5 are enlarged cross-sectional views of the cutting device 1 when the cutting blade 21 reaches the position P1 in the first circumferential direction (enlarged cross-sectional view cut in a direction orthogonal to the axial direction of the transport roll 20). Of these, FIG. 4 is a cross-sectional view at a position where the cross section of the mixed material laminated portion 15 appears, and FIG. 5 is a cross-sectional view at a position where the cross section of the non-mixed material laminated portion 16 appears.

第２アンビル付きロール４０は、円柱状の第２ロール４２と、第２ロール４２に固定された第２アンビル４１とを有する（図１及び図６参照）。第２アンビル４１は、第２ロール４２の外周面４２ｂから径方向外側に突出する態様で、第２ロール４２に設けられている。この第２アンビル付きロール４０は、搬送ロール２０と平行に設けられている。詳細には、第２アンビル付きロール４０は、搬送ロール２０の第２周方向位置Ｐ２において、第２ロール４２の外周面４２ｂが搬送ロール２０の外周面２０ｂと対向（対面）するように設けられている。 The roll 40 with a second anvil has a columnar second roll 42 and a second anvil 41 fixed to the second roll 42 (see FIGS. 1 and 6). The second anvil 41 is provided on the second roll 42 in a manner in which the second anvil 41 projects radially outward from the outer peripheral surface 42b of the second roll 42. The roll 40 with a second anvil is provided in parallel with the transport roll 20. Specifically, the roll 40 with the second anvil is provided so that the outer peripheral surface 42b of the second roll 42 faces (faces) the outer peripheral surface 20b of the transport roll 20 at the position P2 in the second circumferential direction of the transport roll 20. ing.

なお、第２周方向位置Ｐ２は、搬送ロール２０の外周面２０ｂへの帯状電極シート１０の巻き付け開始位置ＰＳよりも搬送方向ＤＭの下流側で、且つ、第１周方向位置Ｐ１よりも搬送方向ＤＭの下流側に位置している。詳細には、第２周方向位置Ｐ２は、搬送ロール２０の軸線ＡＸの周りに、巻き付け開始位置ＰＳから搬送方向ＤＭの下流側に第２角度θ２（本実施形態では１３５°）だけ移動した位置である（図１参照）。すなわち、第２周方向位置Ｐ２は、搬送ロール２０の軸線ＡＸの周りに、第１周方向位置Ｐ１から搬送方向ＤＭの下流側に９０°移動した位置である（図１参照）。 The second circumferential position P2 is on the downstream side of the transport direction DM from the winding start position PS of the strip-shaped electrode sheet 10 around the outer peripheral surface 20b of the transport roll 20, and is in the transport direction from the first circumferential position P1. It is located on the downstream side of DM. Specifically, the second circumferential position P2 is a position moved around the axis AX of the transport roll 20 by a second angle θ2 (135 ° in this embodiment) from the winding start position PS to the downstream side of the transport direction DM. (See FIG. 1). That is, the second circumferential position P2 is a position moved 90 ° around the axis AX of the transport roll 20 from the first circumferential position P1 to the downstream side of the transport direction DM (see FIG. 1).

第２アンビル付きロール４０は、搬送ロール２０が周方向に１／４回転したときに、自身が周方向に１回転する。すなわち、第２アンビル付きロール４０は、搬送ロール２０が周方向に１回転したときに、自身が周方向に４回転する。そして、搬送ロール２０の回転に伴って各々の切断刃２１が搬送ロール２０の第２周方向位置Ｐ２に達したときに、第２アンビル４１が第２周方向位置Ｐ２に達した切断刃２１（刃先２１ｂ）と径方向に対向するように、搬送ロール２０と第２アンビル付きロール４０とが設けられている（図１及び図６参照）。なお、第２アンビル４１は、溝切り用アンビルであり、外側に開口する溝部４１ｂであって、搬送ロール２０の切断刃２１の刃先２１ｂが挿入可能とされた溝部４１ｂを有する。 When the transport roll 20 rotates 1/4 in the circumferential direction, the roll 40 with the second anvil makes one rotation in the circumferential direction. That is, when the transport roll 20 makes one rotation in the circumferential direction, the roll 40 with the second anvil makes four rotations in the circumferential direction. Then, when each of the cutting blades 21 reaches the second circumferential position P2 of the transport roll 20 with the rotation of the transport roll 20, the second anvil 41 reaches the second circumferential position P2 (the cutting blade 21 ( A transport roll 20 and a roll 40 with a second anvil are provided so as to face the cutting edge 21b) in the radial direction (see FIGS. 1 and 6). The second anvil 41 is an anvil for grooving, and has a groove portion 41b that opens to the outside, and has a groove portion 41b into which the cutting edge 21b of the cutting blade 21 of the transport roll 20 can be inserted.

従って、搬送ロール２０の回転に伴って、合材積層部１５を切断した切断刃２１が、合材積層部１５の切断部位１５ｂと共に搬送ロール２０の第２周方向位置Ｐ２（第１周方向位置Ｐ１よりも搬送方向ＤＭの下流側の位置）に達するとき、第２アンビル付きロール４０の第２アンビル４１によって、非合材積層部１６のうち切断刃２１に対して搬送ロール２０の径方向の外側に位置する部位（第１周方向位置Ｐ１で切断された合材積層部１５の切断部位１５ｂに対して幅方向ＤＷに隣接する部位である。この部位を切断刃対向部１６ｃとする）を、径方向の内側に位置する切断刃２１に押しつけて、レザーカット方式（溝切り方式）で非合材積層部１６を幅方向ＤＷに切断することができる（図６、図７、図８参照）。なお、図６及び図７は、切断刃２１が第２周方向位置Ｐ２に達したときの切断装置１の拡大断面図（搬送ロール２０の軸線方向に直交する方向に切断した拡大断面図）であり、このうち図６は、合材積層部１５の断面が現れる位置における断面図であり、図７は、非合材積層部１６の断面が現れる位置における断面図である。 Therefore, as the transport roll 20 rotates, the cutting blade 21 that cuts the composite material laminated portion 15 together with the cutting portion 15b of the composite material laminated portion 15 is located at the second circumferential direction position P2 (first circumferential direction position) of the transport roll 20. When the position on the downstream side of the transport direction DM from P1) is reached, the second anvil 41 of the roll 40 with the second anvil causes the transport roll 20 in the radial direction of the transport roll 20 with respect to the cutting blade 21 of the non-mixed material laminated portion 16. A portion located on the outside (a portion adjacent to the cutting portion 15b of the composite material laminated portion 15 cut at the position P1 in the first circumferential direction in the width direction DW. This portion is referred to as a cutting blade facing portion 16c). , The non-mixed material laminated portion 16 can be cut in the width direction DW by the leather cutting method (grooving method) by pressing against the cutting blade 21 located inside in the radial direction (see FIGS. 6, 7, and 8). ). 6 and 7 are enlarged cross-sectional views of the cutting device 1 when the cutting blade 21 reaches the position P2 in the second circumferential direction (enlarged cross-sectional view cut in a direction orthogonal to the axial direction of the transport roll 20). Of these, FIG. 6 is a cross-sectional view at a position where the cross section of the composite material laminated portion 15 appears, and FIG. 7 is a cross-sectional view at a position where the cross section of the non-mixed material laminated portion 16 appears.

この切断時、第２アンビル４１の先端部４１ｃは、搬送ロール２０の溝部２３内に進入して搬送ロール２０の外周面２０ｂよりも径方向内側に配置され、切断刃２１の刃先２１ｂは、第２アンビル４１の溝部４１ｂ内に挿入される（図７参照）。これにより、レザーカット方式（溝切り方式）で非合材積層部１６を切断することができる。また、このとき、第１周方向位置Ｐ１において切断された合材積層部１５の切断部位１５ｂも、第２アンビル４１によって切断刃２１に押しつけられて、再び、切断部位１５ｂに切断刃２１が進入することになるが、第１周方向位置Ｐ１における切断位置と第２周方向位置Ｐ２における切断位置とは等しいため、合材積層部１５の切断部位１５ｂに変化は生じない（図６参照）。これにより、帯状電極シート１０が幅方向ＤＷに切断されて、短冊状の電極シート１８が作製される。作製された短冊状の電極シート１８は、搬送ロール２０の下方に位置する収容ケース７０内に収容される（図１参照）。 At the time of this cutting, the tip portion 41c of the second anvil 41 enters the groove portion 23 of the transport roll 20 and is arranged radially inside the outer peripheral surface 20b of the transport roll 20, and the cutting edge 21b of the cutting blade 21 is the second. 2 It is inserted into the groove 41b of the anvil 41 (see FIG. 7). As a result, the non-mixed material laminated portion 16 can be cut by the leather cutting method (grooving method). Further, at this time, the cutting portion 15b of the composite material laminated portion 15 cut at the position P1 in the first circumferential direction is also pressed against the cutting blade 21 by the second anvil 41, and the cutting blade 21 enters the cutting portion 15b again. However, since the cutting position at the first circumferential position P1 and the cutting position at the second circumferential position P2 are equal to each other, the cutting portion 15b of the composite material laminated portion 15 does not change (see FIG. 6). As a result, the strip-shaped electrode sheet 10 is cut in the width direction DW to produce a strip-shaped electrode sheet 18. The produced strip-shaped electrode sheet 18 is housed in a storage case 70 located below the transport roll 20 (see FIG. 1).

このように、本実施形態の切断装置１では、第１周方向位置Ｐ１で切断された合材積層部１５の切断部位１５ｂと切断刃２１とについて、帯状電極シート１０の長手方向ＤＬにかかる位置関係を維持した状態で、搬送ロール２０の第１周方向位置Ｐ１よりも搬送方向ＤＭの下流側の第２周方向位置Ｐ２において、切断刃２１と第２アンビル４１とによって、非合材積層部１６をレザーカット方式（溝切り方式）で幅方向ＤＷに切断することができる。すなわち、帯状電極シート１０の長手方向ＤＬにかかる切断刃２１の位置を、合材積層部１５を切断した位置に維持した状態で、当該切断刃２１によって、非合材積層部１６をレザーカット方式で切断することができる。第１周方向位置Ｐ１で切断された合材積層部１５の切断部位１５ｂと切断刃２１とは、帯状電極シート１０の長手方向ＤＬにかかる互いの位置関係を変えることなく、第１周方向位置Ｐ１から第２周方向位置Ｐ２まで移動するからである。 As described above, in the cutting device 1 of the present embodiment, the cutting portion 15b of the composite material laminated portion 15 cut at the first circumferential direction position P1 and the cutting blade 21 are positioned in the longitudinal direction DL of the strip-shaped electrode sheet 10. While maintaining the relationship, at the second circumferential position P2 on the downstream side of the transport direction DM from the first circumferential position P1 of the transport roll 20, the cutting blade 21 and the second anvil 41 make a non-mixed material laminated portion. 16 can be cut in the width direction DW by a leather cutting method (grooving method). That is, while the position of the cutting blade 21 in the longitudinal direction DL of the strip-shaped electrode sheet 10 is maintained at the position where the composite material laminated portion 15 is cut, the non-mixed material laminated portion 16 is leather-cut by the cutting blade 21. Can be cut with. The cutting portion 15b of the composite material laminated portion 15 cut at the first circumferential position P1 and the cutting blade 21 are positioned in the first circumferential direction without changing the positional relationship with each other in the longitudinal direction DL of the strip-shaped electrode sheet 10. This is because it moves from P1 to the position P2 in the second circumferential direction.

このため、合材積層部１５の切断位置（切断部位１５ｂの位置）と非合材積層部１６の切断位置（切断部位１６ｂの位置）とについて、長手方向ＤＬにかかる位置を一致させる（等しくする）ことができる（図８参照）。すなわち、合材積層部１５と、これに対して幅方向ＤＷに隣接する非合材積層部１６とについて、長手方向ＤＬにかかる切断位置のズレなく、両者を切断することができる。これにより、合材積層部１５と非合材積層部１６とを異なる切断方式で別々に切断するにも拘わらず、帯状電極シート１０を幅方向ＤＷに適切に（真っ直ぐ）切断することができる。なお、図８は、搬送ロール２０によって搬送方向ＤＭに搬送されつつ切断刃２１によって切断される帯状電極シート１０を、平面展開した図である。 Therefore, the cutting position of the mixed material laminated portion 15 (the position of the cutting portion 15b) and the cutting position of the non-mixed material laminated portion 16 (the position of the cutting portion 16b) are made to match (equalize) the positions applied to the DL in the longitudinal direction. ) Can be done (see FIG. 8). That is, it is possible to cut both the mixed material laminated portion 15 and the non-mixed material laminated portion 16 adjacent to the DW in the width direction without any deviation of the cutting position applied to the DL in the longitudinal direction. As a result, the strip-shaped electrode sheet 10 can be appropriately (straight) cut in the width direction DW even though the mixed material laminated portion 15 and the non-mixed material laminated portion 16 are separately cut by different cutting methods. Note that FIG. 8 is a plan view of the strip-shaped electrode sheet 10 cut by the cutting blade 21 while being conveyed in the transport direction DM by the transport roll 20.

本実施形態の切断装置１では、帯状電極シート１０のうち、厚みの厚い合材積層部１５をスコアカット方式（押し切り方式）で切断し、厚みの薄い非合材積層部１６をレザーカット方式（溝切り方式）で切断するので、合材積層部１５と非合材積層部１６とを適切に切断することができる。 In the cutting device 1 of the present embodiment, among the strip-shaped electrode sheets 10, the thick composite material laminated portion 15 is cut by the score cut method (push-cut method), and the thin non-mixed material laminated portion 16 is cut by the leather cut method (leather cut method). Since the cutting is performed by the grooving method), the mixed material laminated portion 15 and the non-mixed material laminated portion 16 can be appropriately cut.

次に、実施形態にかかる帯状電極シート１０の切断方法について説明する。まず、第１切断工程において、切断装置１の切断刃２１によって、帯状電極シート１０のうち合材積層部１５をスコアカット方式（押し切り方式）で幅方向ＤＷに切断する。具体的には、前述のように、帯状電極シート１０を搬送する搬送ロール２０の回転に伴って、巻き付け開始位置ＰＳから帯状電極シート１０と共に周方向に移動する切断刃２１が、搬送ロール２０の第１周方向位置Ｐ１に達すると、第１アンビル付きロール３０の第１アンビル３１によって、帯状電極シート１０の合材積層部１５のうち切断刃２１に対して搬送ロール２０の径方向の外側に位置する部位（切断刃対向部１５ｃ）を、径方向の内側に位置する切断刃２１に押しつけて、スコアカット方式（押し切り方式）で合材積層部１５を幅方向ＤＷに切断する（図１及び図４参照）。 Next, a method of cutting the strip-shaped electrode sheet 10 according to the embodiment will be described. First, in the first cutting step, the cutting blade 21 of the cutting device 1 cuts the composite material laminated portion 15 of the strip-shaped electrode sheet 10 in the width direction DW by a score cut method (push-cut method). Specifically, as described above, the cutting blade 21 that moves in the circumferential direction together with the strip-shaped electrode sheet 10 from the winding start position PS with the rotation of the transport roll 20 that conveys the strip-shaped electrode sheet 10 is the transport roll 20. When the position P1 in the first circumferential direction is reached, the first anvil 31 of the roll 30 with the first anvil causes the laminated material laminated portion 15 of the strip-shaped electrode sheet 10 to be outside the radial side of the transport roll 20 with respect to the cutting blade 21. The located portion (cutting blade facing portion 15c) is pressed against the cutting blade 21 located inside in the radial direction, and the composite material laminated portion 15 is cut in the width direction DW by the score cut method (push-cut method) (FIG. 1 and FIG. (See FIG. 4).

その後、第２切断工程において、第１切断工程で切断した合材積層部１５の切断部位１５ｂと切断刃２１とについて、帯状電極シート１０の長手方向ＤＬにかかる位置関係を維持した状態で、当該切断刃２１によって、非合材積層部１６をレザーカット方式（溝切り方式）で幅方向ＤＷに切断する。すなわち、帯状電極シート１０の長手方向ＤＬにかかる切断刃２１の位置を、第１切断工程で合材積層部１５を切断した位置に維持した状態で、当該切断刃２１によって、非合材積層部１６をレザーカット方式で切断する。 After that, in the second cutting step, the cutting portion 15b of the composite material laminated portion 15 cut in the first cutting step and the cutting blade 21 are said to be in a state of maintaining the positional relationship with respect to the longitudinal DL of the strip-shaped electrode sheet 10. The cutting blade 21 cuts the non-mixed material laminated portion 16 in the width direction DW by a leather cutting method (grooving method). That is, while the position of the cutting blade 21 in the longitudinal direction DL of the strip-shaped electrode sheet 10 is maintained at the position where the mixed material laminated portion 15 was cut in the first cutting step, the non-mixed material laminated portion is provided by the cutting blade 21. 16 is cut by a leather cut method.

具体的には、搬送ロール２０の回転に伴って、合材積層部１５を切断した切断刃２１が、合材積層部１５の切断部位１５ｂと共に搬送ロール２０の第２周方向位置Ｐ２に達すると、第２アンビル付きロール４０の第２アンビル４１によって、非合材積層部１６のうち切断刃２１に対して搬送ロール２０の径方向の外側に位置する切断刃対向部１６ｃを、径方向の内側に位置する切断刃２１に押しつけて、レザーカット方式（溝切り方式）で非合材積層部１６を幅方向ＤＷに切断する（図１及び図７参照）。これにより、帯状電極シート１０が幅方向ＤＷに切断されて、短冊状の電極シート１８が作製される。作製された短冊状の電極シート１８は、搬送ロール２０の下方に位置する収容ケース７０内に収容される（図１参照）。 Specifically, when the cutting blade 21 that cuts the composite material laminated portion 15 reaches the position P2 in the second circumferential direction of the transport roll 20 together with the cutting portion 15b of the mixed material laminated portion 15 as the transport roll 20 rotates. The second anvil 41 of the roll 40 with the second anvil causes the cutting blade facing portion 16c located on the radial outer side of the transport roll 20 with respect to the cutting blade 21 of the non-mixed material laminated portion 16 to be radially inside. The non-mixed material laminated portion 16 is cut in the width direction DW by a leather cutting method (grooving method) by pressing against the cutting blade 21 located at (see FIGS. 1 and 7). As a result, the strip-shaped electrode sheet 10 is cut in the width direction DW to produce a strip-shaped electrode sheet 18. The produced strip-shaped electrode sheet 18 is housed in a storage case 70 located below the transport roll 20 (see FIG. 1).

本実施形態の切断方法では、帯状電極シート１０のうち、厚みの厚い合材積層部１５をスコアカット方式（押し切り方式）で切断し、厚みの薄い非合材積層部１６をレザーカット方式（溝切り方式）で切断するので、合材積層部１５と非合材積層部１６とを適切に切断することができる。 In the cutting method of the present embodiment, among the strip-shaped electrode sheets 10, the thick composite material laminated portion 15 is cut by the score cut method (push-cut method), and the thin non-mixed material laminated portion 16 is cut by the leather cut method (groove). Since it is cut by the cutting method), the mixed material laminated portion 15 and the non-mixed material laminated portion 16 can be appropriately cut.

さらに、第２切断工程では、第１切断工程で切断した合材積層部１５の切断部位１５ｂと切断刃２１とについて、帯状電極シート１０の長手方向ＤＬにかかる位置関係を維持した状態で、第１切断工程で用いた切断刃２１によって、非合材積層部１６を幅方向ＤＷに切断する。このため、合材積層部１５の切断位置と非合材積層部１６の切断位置とについて、長手方向ＤＬにかかる位置を一致させる（等しくする）ことができる。すなわち、合材積層部１５と、これに対して幅方向ＤＷに隣接する非合材積層部１６とについて、長手方向ＤＬにかかる切断位置のズレなく、両者を切断することができる。これにより、合材積層部１５と非合材積層部１６とを異なる切断方式で別々に切断するにも拘わらず、帯状電極シート１０を幅方向ＤＷに適切に（真っ直ぐ）切断することができる。 Further, in the second cutting step, the cutting portion 15b of the composite material laminated portion 15 cut in the first cutting step and the cutting blade 21 are in a state of maintaining the positional relationship with respect to the longitudinal DL of the strip-shaped electrode sheet 10. 1 The non-mixed material laminated portion 16 is cut in the width direction DW by the cutting blade 21 used in the cutting step. Therefore, the cutting position of the mixed material laminated portion 15 and the cutting position of the non-mixed material laminated portion 16 can be matched (equalized) with each other in the longitudinal direction DL. That is, it is possible to cut both the mixed material laminated portion 15 and the non-mixed material laminated portion 16 adjacent to the DW in the width direction without any deviation of the cutting position applied to the DL in the longitudinal direction. As a result, the strip-shaped electrode sheet 10 can be appropriately (straight) cut in the width direction DW even though the mixed material laminated portion 15 and the non-mixed material laminated portion 16 are separately cut by different cutting methods.

以上において、本発明を実施形態に即して説明したが、本発明は前記実施形態等に限定されるものではなく、その要旨を逸脱しない範囲で、適宜変更して適用できることはいうまでもない。 In the above, the present invention has been described in accordance with the embodiments, but it goes without saying that the present invention is not limited to the above-described embodiments and the like, and can be appropriately modified and applied without departing from the gist thereof. ..

１ 切断装置
１０ 帯状電極シート
１１ 集電箔
１２ 電極合材層
１５ 合材積層部
１５ｂ 合材積層部の切断部位
１６ 非合材積層部
２０ 搬送ロール
２０ｂ 外周面
２１ 切断刃
３０ 第１アンビル付きロール
３１ 第１アンビル
４０ 第２アンビル付きロール
４１ 第２アンビル
ＤＬ 長手方向
ＤＭ 搬送方向
ＤＷ 幅方向
Ｐ１ 第１周方向位置
Ｐ２ 第２周方向位置 1 Cutting device 10 Band-shaped electrode sheet 11 Current collecting foil 12 Electrode mixed material layer 15 Mixed material laminated part 15b Cutting part of mixed material laminated part 16 Non-mixed material laminated part 20 Conveying roll 20b Outer peripheral surface 21 Cutting blade 30 First roll with anvil 31 1st anvil 40 Roll with 2nd anvil 41 2nd anvil DL Longitudinal direction DM Transport direction DW Width direction P1 1st circumferential position P2 2nd circumferential position

Claims (2)

長手方向に延びる帯状の集電箔の表面に電極合材層が積層された合材積層部と、
前記集電箔のうち、前記電極合材層が積層されることなく、前記合材積層部に対して前記長手方向に直交する幅方向に隣接する非合材積層部と、を備える
帯状電極シートを、前記幅方向に切断する方法において、
切断刃によって前記合材積層部をスコアカット方式で前記幅方向に切断する第１切断工程と、
前記第１切断工程で切断した前記合材積層部の切断部位と前記切断刃との前記長手方向にかかる位置関係を維持した状態で、当該切断刃によって前記非合材積層部をレザーカット方式で前記幅方向に切断して、前記帯状電極シートを前記幅方向に切断する第２切断工程と、を備える
帯状電極シートの切断方法。 A mixture laminated portion in which an electrode mixture layer is laminated on the surface of a strip-shaped current collector foil extending in the longitudinal direction, and a mixture laminated portion.
Among the current collector foils, a strip-shaped electrode sheet including a non-mixed material laminated portion adjacent to the mixed material laminated portion in the width direction orthogonal to the longitudinal direction without laminating the electrode mixed material layer. In the method of cutting in the width direction
The first cutting step of cutting the laminated material laminated portion in the width direction by a score cut method with a cutting blade, and
While maintaining the positional relationship between the cutting portion of the composite material laminated portion cut in the first cutting step and the cutting blade in the longitudinal direction, the non-mixed material laminated portion is cut by the leather cutting method by the cutting blade. A method for cutting a strip-shaped electrode sheet, comprising a second cutting step of cutting in the width direction and cutting the strip-shaped electrode sheet in the width direction. 長手方向に延びる帯状の集電箔の表面に電極合材層が積層された合材積層部と、
前記集電箔のうち、前記電極合材層が積層されることなく、前記合材積層部に対して前記長手方向に直交する幅方向に隣接する非合材積層部と、を備える
帯状電極シートを、前記幅方向に切断する切断装置において、
周方向に回転して前記帯状電極シートを前記長手方向に沿った搬送方向に搬送する搬送ロールであって、当該搬送ロールの軸線方向に延びる切断刃を当該搬送ロールの外周面側に有し、前記帯状電極シートを、当該搬送ロールの前記外周面に巻き付けるようにして搬送する搬送ロールと、
前記搬送ロールの回転に伴って前記帯状電極シートと共に前記周方向に移動する前記切断刃が、前記搬送ロールの第１周方向位置に達するときに、前記合材積層部のうち前記切断刃に対して前記搬送ロールの径方向の外側に位置する部位を、前記径方向の内側に位置する前記切断刃に押しつけて、スコアカット方式で前記合材積層部を前記幅方向に切断させる第１アンビルと、
前記合材積層部を切断した前記切断刃が、前記搬送ロールの回転に伴って前記合材積層部の切断部位と共に前記搬送ロールの第２周方向位置に達するときに、前記非合材積層部のうち前記切断刃に対して前記搬送ロールの径方向の外側に位置する部位を、前記径方向の内側に位置する前記切断刃に押しつけて、レザーカット方式で前記非合材積層部を前記幅方向に切断させる第２アンビルと、を備える
切断装置。 A mixture laminated portion in which an electrode mixture layer is laminated on the surface of a strip-shaped current collector foil extending in the longitudinal direction, and a mixture laminated portion.
Among the current collecting foils, a strip-shaped electrode sheet including a non-mixed material laminated portion adjacent to the mixed material laminated portion in the width direction orthogonal to the longitudinal direction without laminating the electrode mixed material layer. In the cutting device that cuts in the width direction.
A transport roll that rotates in the circumferential direction and transports the strip-shaped electrode sheet in the transport direction along the longitudinal direction, and has a cutting blade extending in the axial direction of the transport roll on the outer peripheral surface side of the transport roll. A transport roll that transports the strip-shaped electrode sheet by winding it around the outer peripheral surface of the transport roll, and a transport roll.
When the cutting blade that moves in the circumferential direction together with the strip-shaped electrode sheet with the rotation of the transport roll reaches the position in the first circumferential direction of the transport roll, the cutting blade of the mixed material laminated portion With the first anvil, the portion located on the outer side in the radial direction of the transport roll is pressed against the cutting blade located on the inner side in the radial direction to cut the composite material laminated portion in the width direction by a score cut method. ,
When the cutting blade that cuts the composite material laminated portion reaches the position in the second circumferential direction of the transport roll together with the cut portion of the mixed material laminated portion as the transport roll rotates, the non-mixed material laminated portion Of the cutting blades, a portion located on the outer side of the transport roll in the radial direction is pressed against the cutting blades located on the inner side in the radial direction, and the non-mixed material laminated portion is formed into the width by a leather cutting method. A cutting device including a second anvil that cuts in a direction.
JP2021001984A 2021-01-08 2021-01-08 Cutting method and cutting device for strip-shaped electrode sheet Active JP7179881B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2021001984A JP7179881B2 (en) 2021-01-08 2021-01-08 Cutting method and cutting device for strip-shaped electrode sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2021001984A JP7179881B2 (en) 2021-01-08 2021-01-08 Cutting method and cutting device for strip-shaped electrode sheet

Publications (2)

Publication Number Publication Date
JP2022107196A true JP2022107196A (en) 2022-07-21
JP7179881B2 JP7179881B2 (en) 2022-11-29

Family

ID=82457467

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2021001984A Active JP7179881B2 (en) 2021-01-08 2021-01-08 Cutting method and cutting device for strip-shaped electrode sheet

Country Status (1)

Country Link
JP (1) JP7179881B2 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011204613A (en) * 2010-03-26 2011-10-13 Mitsubishi Heavy Ind Ltd Electrode plate manufacturing device
JP2017123321A (en) * 2016-01-06 2017-07-13 株式会社豊田自動織機 Electrode manufacturing apparatus
JP2018014222A (en) * 2016-07-20 2018-01-25 株式会社豊田自動織機 Electrode manufacturing method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011204613A (en) * 2010-03-26 2011-10-13 Mitsubishi Heavy Ind Ltd Electrode plate manufacturing device
JP2017123321A (en) * 2016-01-06 2017-07-13 株式会社豊田自動織機 Electrode manufacturing apparatus
JP2018014222A (en) * 2016-07-20 2018-01-25 株式会社豊田自動織機 Electrode manufacturing method

Also Published As

Publication number Publication date
JP7179881B2 (en) 2022-11-29

Similar Documents

Publication Publication Date Title
JP4823393B1 (en) Method for laminating positive and negative electrode plates and apparatus therefor
JP2014179304A (en) Method and device for forming electrode laminate for secondary battery
JP2012106370A (en) Lamination apparatus
KR20150037089A (en) Lamination device including electrode guide
WO2017014233A1 (en) Electrode assembly of lithium ion secondary battery and method for producing same
JP2015201328A (en) Electrode manufacturing device and electrode manufacturing method
JP2017196669A (en) Electrode manufacturing facility
JP6593677B2 (en) Winding machine and electrode body manufacturing method
JP6686724B2 (en) Electrode manufacturing equipment
JP6717159B2 (en) Electrode manufacturing equipment
JP7179881B2 (en) Cutting method and cutting device for strip-shaped electrode sheet
CN109659472B (en) Method for manufacturing separator for lithium ion secondary battery and method for cutting separator
JP7192530B2 (en) Battery manufacturing method
JP2021028896A (en) Manufacturing method of power storage device
JP7140855B2 (en) Strip-shaped sheet cutting device and strip-shaped sheet cutting method
JP6776893B2 (en) Electrode manufacturing equipment
JP6064558B2 (en) Electrode body manufacturing method and electrode winding apparatus
JP6736953B2 (en) Electrode manufacturing method and rotary die cutter
JP7102379B2 (en) Manufacturing equipment for bagging electrodes, integration equipment and manufacturing methods for bagging electrodes
JP2016162549A (en) Manufacturing device and manufacturing method for electrode with separator
JP7070285B2 (en) Electrode manufacturing equipment
JP2018133344A5 (en) Method for producing laminated electrode body, laminated electrode body and battery
JP6176193B2 (en) Roll forming apparatus and roll forming method
JP6987672B2 (en) Separator sheet cutting device
KR101717004B1 (en) Method for producing separator and method for slitting

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20220110

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20221104

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20221115

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20221116

R150 Certificate of patent or registration of utility model

Ref document number: 7179881

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150