JP2017191728A - Method of manufacturing electrode, and rotary die cutter - Google Patents

Method of manufacturing electrode, and rotary die cutter Download PDF

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JP2017191728A
JP2017191728A JP2016081144A JP2016081144A JP2017191728A JP 2017191728 A JP2017191728 A JP 2017191728A JP 2016081144 A JP2016081144 A JP 2016081144A JP 2016081144 A JP2016081144 A JP 2016081144A JP 2017191728 A JP2017191728 A JP 2017191728A
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electrode
cutting
cut
electrode material
roll
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JP6736953B2 (en
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真也 浅井
Shinya Asai
真也 浅井
寛恭 西原
Hiroyasu Nishihara
寛恭 西原
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Toyota Industries Corp
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    • 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
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    • Y02E60/10—Energy storage using batteries

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  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
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Abstract

PROBLEM TO BE SOLVED: To provide a method of manufacturing an electrode, capable of positioning a cut-out electrode even during transportation, and a rotary die cutter.SOLUTION: In a method of manufacturing an electrode, when an electrode material 20 is allowed to pass through between a die roll 35 and an anvil roll 45 while being transported, the electrode material 20 is cut along the shape of a cutting edge 40 while an exposed portion 23 is raised from a peripheral surface of the anvil roll 45 by a raised portion 46. At this time, a non-cutting portion 23b is formed, by a gap S formed between a second coated portion 22b and the raised portion 46, to the exposed portion 23 corresponding to the gap S.SELECTED DRAWING: Figure 6

Description

本発明は、帯状の電極材料を個片の電極の形状に切断する切断工程を備えた電極の製造方法及びロータリーダイカッタに関する。   The present invention relates to an electrode manufacturing method and a rotary die cutter including a cutting step of cutting a strip-shaped electrode material into the shape of an individual electrode.

例えば、ＥＶ（Electric Vehicle）やＰＨＶ（Plug in Hybrid Vehicle）などの車両には、駆動源としてのモータで使用される電力を蓄えるための蓄電装置が搭載されている。このような蓄電装置としては、例えばリチウムイオン二次電池やニッケル水素二次電池といった二次電池が知られている。二次電池は、活物質層を有する正極及び負極の電極が層状に重なった電極組立体を備える。電極組立体の構造としては、一定長の長尺な正極及び負極の電極を、重ね合わせた状態で筒状に巻き上げた捲回式と、概略矩形をなす正極及び負極の電極を、交互に多数積層した積層式と、が知られている。例えば、リチウムイオン二次電池などの電極では、集電体としての金属箔を備え、金属箔の表面に活物質層を備えた構成が多用されている。   For example, vehicles such as EV (Electric Vehicle) and PHV (Plug in Hybrid Vehicle) are equipped with a power storage device for storing electric power used by a motor as a drive source. As such a power storage device, for example, a secondary battery such as a lithium ion secondary battery or a nickel hydride secondary battery is known. The secondary battery includes an electrode assembly in which positive and negative electrodes each having an active material layer are layered. As the structure of the electrode assembly, a long positive electrode and a negative electrode of a certain length are wound in a cylindrical shape in an overlapping state, and a large number of positive and negative electrodes having a substantially rectangular shape are alternately arranged. A stacked type is known. For example, in an electrode such as a lithium ion secondary battery, a configuration including a metal foil as a current collector and an active material layer on the surface of the metal foil is frequently used.

例えば特許文献１には、電極の製造過程に使用される装置として、帯状の電極材料を切断することにより、予め定めた矩形形状の電極を切り出すロータリーダイカッタを備えた装置が開示されている。   For example, Patent Document 1 discloses an apparatus provided with a rotary die cutter that cuts a predetermined rectangular electrode by cutting a strip-shaped electrode material as an apparatus used in an electrode manufacturing process.

特開２００９−６６６７６号公報JP 2009-66676 A

積層式の電極組立体を採用する場合、蓄電装置の製造工程上、前述の切断工程の後、個片となった正極又は負極の電極は、一旦、個々に収容具（マガジン）に積層される、又は積層装置に直接搬送され、電極組立体の形成に用いられる。しかしながら、帯状の電極材料から個片の電極を切り出す場合、電極材料から切り離された電極は、ロータリーダイカッタから搬送装置、例えばベルトコンベアに乗り移る際に、その姿勢にバラツキが生じる。個片となった電極は、例えば、幅方向の一端が先にベルトコンベアに接触することにより受ける力でも、容易に回転や変位してしまう。このように、個片となった電極の位置や姿勢のバラツキが大きいと、収容具に集積する場合も、積層装置において積層を行う場合も、その前に、一旦姿勢を整えるための装置・工程が必要となる。   When the stacked electrode assembly is employed, the positive electrode or the negative electrode that has been separated into individual pieces after the above-described cutting step is once laminated individually in a container (magazine) in the manufacturing process of the power storage device. Or directly conveyed to a laminating apparatus and used for forming an electrode assembly. However, when a piece of electrode is cut out from a strip-shaped electrode material, when the electrode cut from the electrode material is transferred from the rotary die cutter to a transport device, for example, a belt conveyor, the posture thereof varies. For example, the electrode that has become a piece is easily rotated or displaced even by a force received when one end in the width direction first comes into contact with the belt conveyor. In this way, when the position and posture of the electrodes that have become individual variations are large, both when accumulating in the container and when laminating in the laminating apparatus, the device / process for adjusting the posture once before that. Is required.

本発明は、上記従来技術に存在する問題点に着目してなされたものであり、その目的は、搬送中であっても切り出した電極の位置決めができる電極の製造方法及びロータリーダイカッタを提供することにある。   The present invention has been made paying attention to the problems existing in the above prior art, and an object of the present invention is to provide an electrode manufacturing method and a rotary die cutter capable of positioning the cut-out electrode even during conveyance. There is.

上記問題点を解決するための電極の製造方法は、帯状集電箔の表面に形成された塗工部と、前記塗工部に隣接し、前記帯状集電箔の長手方向に沿って存在し前記帯状集電箔の露出した露出部と、を備える電極材料を、個片の電極の形状に切断する切断工程を備えた電極の製造方法であって、前記切断工程は、切刃を周面に備えるダイロール、及び前記ダイロールの周面に対向して配置されたアンビルロールを含むロータリーダイカッタによって行われ、前記電極材料を搬送しながら前記ダイロールと前記アンビルロールの間を通過させる際、嵩上げ部により前記露出部を前記アンビルロールの周面から嵩上げしつつ、前記切刃の形状に沿って前記電極材料の切断を行い、前記塗工部と前記嵩上げ部との間に形成された隙間により、該隙間に対応した露出部に非切断部を形成することを要旨とする。   An electrode manufacturing method for solving the above-described problems is a coating portion formed on the surface of the strip-shaped current collector foil, and is adjacent to the coating portion and along the longitudinal direction of the strip-shaped current collector foil. An exposed portion of the strip-shaped current collector foil, and an electrode manufacturing method comprising a cutting step of cutting an electrode material into the shape of an individual electrode, wherein the cutting step has a peripheral surface A die roll, and a rotary die cutter including an anvil roll disposed to face the peripheral surface of the die roll, and when passing between the die roll and the anvil roll while conveying the electrode material, a raised portion While raising the exposed portion from the peripheral surface of the anvil roll, the electrode material is cut along the shape of the cutting edge, and the gap formed between the coated portion and the raised portion, Against this gap And summarized in that forming the uncut portion in the exposed portion was.

これによれば、電極材料がダイロールとアンビルロールの間を通過する際、塗工部の厚みによってアンビルロールの周面より高い位置にある露出部であっても、嵩上げ部によってアンビルロールから嵩上げされた位置に支持される。   According to this, when the electrode material passes between the die roll and the anvil roll, it is raised from the anvil roll by the raising portion even if it is an exposed portion located higher than the peripheral surface of the anvil roll due to the thickness of the coating portion. It is supported at the position.

露出部のうち隙間に対応した部分では、露出部に押し当てられた切刃の一部が隙間に逃げ、切刃が押し当てられながらも露出部の繋がった非切断部が形成される。このため、電極として切り出される部分と、電極とは異なる部分とが非切断部によって繋がっている。よって、切り出された電極がロータリーダイカッタから、例えば搬送装置に乗り移る際に、その姿勢がバラツクことを抑制できる。したがって、切断工程の後工程で、切り出された電極を収容具に集積する場合、又は積層装置において積層を行う場合に、電極の姿勢を整える必要がない。   In a portion corresponding to the gap in the exposed portion, a part of the cutting blade pressed against the exposed portion escapes into the gap, and a non-cut portion where the exposed portion is connected while the cutting blade is pressed is formed. For this reason, the part cut out as an electrode and the part different from an electrode are connected by the non-cut | disconnecting part. Therefore, when the cut electrode is transferred from the rotary die cutter to, for example, the transport device, it is possible to prevent the posture from being varied. Therefore, it is not necessary to adjust the posture of the electrode when the cut-out electrode is accumulated in the container in the subsequent process of the cutting process or when the stacking apparatus performs stacking.

また、電極の製造方法について、前記電極材料が切断される過程で、前記非切断部では、前記切刃が押し当てられて前記露出部に切れ込みが形成されてもよい。
これによれば、切断工程では、非切断部が形成されると同時に切れ込みが形成される。このため、露出部に切れ込みが形成されることで、非切断部の厚みが露出部より薄くなり、電極として切り出される部分を、電極とは異なる部分から分離しやすくなる。 Moreover, about the manufacturing method of an electrode, in the process in which the said electrode material is cut | disconnected, in the said non-cutting part, the said cutting blade may be pressed and a notch may be formed in the said exposed part.
According to this, in a cutting process, a notch is formed simultaneously with a non-cutting part being formed. For this reason, by forming a cut in the exposed portion, the thickness of the uncut portion becomes thinner than the exposed portion, and the portion cut out as an electrode can be easily separated from the portion different from the electrode.

また、電極の製造方法について、前記切れ込みは、前記電極材料の搬送方向に沿って延びる切刃の一部により前記露出部が切られて形成される。
これによれば、非切断部及び切れ込みは、搬送方向に沿って延びる状態に形成される。このため、電極が搬送方向へ案内されていくに連れて非切断部が切断され、非切断部を簡単に切断することができる。 Moreover, about the manufacturing method of an electrode, the said notch | incision is formed by the said exposed part being cut by a part of cutting blade extended along the conveyance direction of the said electrode material.
According to this, the non-cut portion and the cut are formed in a state extending along the transport direction. For this reason, the non-cut portion is cut as the electrode is guided in the transport direction, and the non-cut portion can be easily cut.

また、電極の製造方法について、前記非切断部を破断する工程を備え、該破断する工程では、前記電極材料のうち前記電極として切り出される部分を、前記電極材料の搬送方向である第１方向へ案内する一方で、前記電極として切り出される部分とは異なる部分を、前記第１方向とは異なる方向へ案内する。   In addition, the electrode manufacturing method includes a step of breaking the non-cut portion, and in the breaking step, a portion of the electrode material cut out as the electrode is moved in a first direction that is a conveyance direction of the electrode material. While guiding, a portion different from the portion cut out as the electrode is guided in a direction different from the first direction.

これによれば、案内方向が異なるため、非切断部に負荷が付与される。この負荷によって非切断部が破断される。このため、簡単な構成により、非切断部を破断することができる。   According to this, since the guide directions are different, a load is applied to the non-cut portion. The uncut portion is broken by this load. For this reason, an uncut part can be fractured with a simple configuration.

上記問題点を解決するためのロータリーダイカッタは、帯状集電箔の表面に形成された塗工部と、前記塗工部に隣接し、前記帯状集電箔の長手方向に沿って存在し前記帯状集電箔の露出した露出部と、を備える電極材料を、個片の電極の形状に切断するロータリーダイカッタであって、切刃を周面に備えるダイロール、及び前記ダイロールの周面に対向して配置されたアンビルロールを含み、前記ダイロールと前記アンビルロールの間を通過する前記電極材料のうち前記露出部を前記アンビルロールの周面から嵩上げする嵩上げ部を有するとともに、前記塗工部と前記嵩上げ部との間に存在する隙間を有し、前記隙間に対応して前記切刃の一部が配置されていることを要旨とする。   A rotary die cutter for solving the above-mentioned problems is a coating portion formed on the surface of the strip-shaped current collector foil, and is adjacent to the coating portion and exists along the longitudinal direction of the strip-shaped current collector foil. A rotary die cutter that cuts an electrode material having an exposed exposed portion of a strip-shaped current collector foil into the shape of an individual electrode, the die roll having a cutting edge on the peripheral surface, and facing the peripheral surface of the die roll An anvil roll disposed as a part of the electrode material passing between the die roll and the anvil roll, and having a raised portion that raises the exposed portion from the peripheral surface of the anvil roll, and the coating portion. The gist is that a gap exists between the raised portion and a part of the cutting blade is disposed corresponding to the gap.

これによれば、電極材料がダイロールとアンビルロールの間を通過する際、塗工部の厚みによってアンビルロールの周面より高い位置にある露出部であっても、嵩上げ部によってアンビルロールから嵩上げされた位置に支持される。露出部のうち隙間に対応した部分では、露出部に押し当てられた切刃の一部を隙間に逃がすことができ、露出部には、該露出部の繋がった非切断部を形成することができる。このため、ロータリーダイカッタにより、電極として切り出される部分を、電極とは異なる部分と非切断部によって繋げた状態に切断することができる。   According to this, when the electrode material passes between the die roll and the anvil roll, it is raised from the anvil roll by the raising portion even if it is an exposed portion located higher than the peripheral surface of the anvil roll due to the thickness of the coating portion. It is supported at the position. In the portion corresponding to the gap in the exposed portion, a part of the cutting blade pressed against the exposed portion can be released to the gap, and the exposed portion can be formed with a non-cut portion connected to the exposed portion. it can. For this reason, the part cut out as an electrode can be cut | disconnected by the rotary die cutter in the state connected with the part different from an electrode, and the non-cut | disconnecting part.

その結果として、切り出された電極がロータリーダイカッタから、例えば搬送装置に乗り移る際に、その姿勢がバラツクことを抑制できる。したがって、切断工程の後工程で、切り出された電極を収容具に集積する場合、又は積層装置において積層を行う場合に、電極の姿勢を整える必要がない。   As a result, when the cut electrode is transferred from the rotary die cutter to, for example, the transfer device, it is possible to prevent the posture from being varied. Therefore, it is not necessary to adjust the posture of the electrode when the cut-out electrode is accumulated in the container in the subsequent process of the cutting process or when the stacking apparatus performs stacking.

本発明によれば、搬送中であっても切り出した電極の位置決めができる。   According to the present invention, the cut-out electrode can be positioned even during conveyance.

二次電池を模式的に示す斜視図。The perspective view which shows a secondary battery typically. 電極組立体を模式的に示す斜視図。The perspective view which shows an electrode assembly typically. （ａ）は電極製造設備を模式的に示す側面図、（ｂ）は電極材料を示す拡大断面図。(A) is a side view schematically showing an electrode manufacturing facility, and (b) is an enlarged sectional view showing an electrode material. ロータリーダイカッタを模式的に示す斜視図。The perspective view which shows a rotary die cutter typically. （ａ）は正極電極の切断予定線を示す平面図、（ｂ）は負極電極の切断予定線を示す平面図。(A) is a top view which shows the cutting plan line of a positive electrode, (b) is a top view which shows the cutting plan line of a negative electrode. （ａ）はロータリーダイカッタによって正極の電極材料を切断する状態を示す図、（ｂ）は切れ込み及び非切断部を示す拡大断面図。(A) is a figure which shows the state which cut | disconnects the electrode material of a positive electrode with a rotary die cutter, (b) is an expanded sectional view which shows a notch and a non-cutting part. 正極の電極材料を切った状態を示す平面図。The top view which shows the state which cut | disconnected the electrode material of the positive electrode. （ａ）はロータリーダイカッタによって負極の電極材料を切断する状態を示す図、（ｂ）はタブ用刃部付近を示す拡大断面図。(A) is a figure which shows the state which cuts the electrode material of a negative electrode with a rotary die cutter, (b) is an expanded sectional view which shows the blade part vicinity of a tab. 負極電極を切った状態を示す平面図。The top view which shows the state which cut the negative electrode. 正極電極を切り出した状態を示す斜視図。The perspective view which shows the state which cut out the positive electrode. ロータリーダイカッタの別例を模式的に示す側面図。The side view which shows typically another example of a rotary die cutter. ロータリーダイカッタの別例を模式的に示す側面図。The side view which shows typically another example of a rotary die cutter. 負極電極の別例を示す平面図。The top view which shows another example of a negative electrode.

以下、電極の製造方法及びロータリーダイカッタを具体化した一実施形態を図１〜図１０にしたがって説明する。
図１に示すように、二次電池１０は、例えばリチウムイオン二次電池である。二次電池１０は、電極組立体１１と、図示しない電解液と、電極組立体１１及び電解液を収容しているケース１２と、を備える。 Hereinafter, an embodiment of an electrode manufacturing method and a rotary die cutter will be described with reference to FIGS.
As shown in FIG. 1, the secondary battery 10 is, for example, a lithium ion secondary battery. The secondary battery 10 includes an electrode assembly 11, an electrolyte solution (not shown), and a case 12 that houses the electrode assembly 11 and the electrolyte solution.

図２に示すように、電極組立体１１は、電極としての複数の正極電極１３と、電極としての複数の負極電極１６と、複数のセパレータ２４と、を備える。正極電極１３と負極電極１６とは、セパレータ２４によって相互に絶縁された状態で層状に重なっている。   As shown in FIG. 2, the electrode assembly 11 includes a plurality of positive electrodes 13 as electrodes, a plurality of negative electrodes 16 as electrodes, and a plurality of separators 24. The positive electrode 13 and the negative electrode 16 overlap each other in a state of being insulated from each other by the separator 24.

正極電極１３は、矩形シート状である。正極電極１３は、正極集電箔１４を備える。正極集電箔１４は、例えばアルミニウム箔である。正極電極１３は、正極集電箔１４の両面を覆う正極活物質層１５を備える。正極電極１３は、正極集電箔１４の一辺から突出した形状の正極タブ１４ａを備える。   The positive electrode 13 has a rectangular sheet shape. The positive electrode 13 includes a positive electrode current collector foil 14. The positive electrode current collector foil 14 is, for example, an aluminum foil. The positive electrode 13 includes a positive electrode active material layer 15 that covers both surfaces of the positive electrode current collector foil 14. The positive electrode 13 includes a positive electrode tab 14 a having a shape protruding from one side of the positive electrode current collector foil 14.

正極電極１３は、正極タブ１４ａの突出した長辺に沿う第１の縁１３ａを備える。正極タブ１４ａは、第１の縁１３ａの途中から突出した形状である。正極電極１３は、第１の縁１３ａの対辺となる長辺に第２の縁１３ｂを備える。また、正極電極１３は、第１の縁１３ａと第２の縁１３ｂの一端同士を繋ぐ短辺に第３の縁１３ｃを備え、第１の縁１３ａと第２の縁１３ｂの他端同士を繋ぐ短辺に第４の縁１３ｄを備える。   The positive electrode 13 includes a first edge 13a along the protruding long side of the positive electrode tab 14a. The positive electrode tab 14a has a shape protruding from the middle of the first edge 13a. The positive electrode 13 includes a second edge 13b on the long side opposite to the first edge 13a. In addition, the positive electrode 13 includes a third edge 13c on a short side connecting one ends of the first edge 13a and the second edge 13b, and the other ends of the first edge 13a and the second edge 13b are connected to each other. A fourth edge 13d is provided on the short side to be connected.

正極電極１３は、第１の縁１３ａに沿って正極未塗工部１４ｂを備える。正極未塗工部１４ｂは、正極活物質層１５が存在せず、正極集電箔１４が露出した部分である。
負極電極１６は、矩形シート状である。負極電極１６は、負極集電箔１７を備える。負極集電箔１７は、例えば銅箔である。負極電極１６は、負極集電箔１７の両面を覆う負極活物質層１８を備える。負極電極１６は、負極集電箔１７の一辺から突出した形状の負極タブ１７ａを備える。 The positive electrode 13 includes a positive electrode uncoated portion 14b along the first edge 13a. The positive electrode uncoated portion 14b is a portion where the positive electrode active material layer 15 is not present and the positive electrode current collector foil 14 is exposed.
The negative electrode 16 has a rectangular sheet shape. The negative electrode 16 includes a negative electrode current collector foil 17. The negative electrode current collector foil 17 is, for example, a copper foil. The negative electrode 16 includes a negative electrode active material layer 18 that covers both surfaces of the negative electrode current collector foil 17. The negative electrode 16 includes a negative electrode tab 17 a that protrudes from one side of the negative electrode current collector foil 17.

負極電極１６は、負極タブ１７ａの突出した長辺に沿う第１の縁１６ａを備える。負極タブ１７ａは、第１の縁１６ａの途中から突出した形状である。負極電極１６は、第１の縁１６ａの対辺となる長辺に第２の縁１６ｂを備える。また、負極電極１６は、第１の縁１６ａと第２の縁１６ｂの一端同士を繋ぐ短辺に第３の縁１６ｃを備え、第１の縁１６ａと第２の縁１６ｂの他端同士を繋ぐ短辺に第４の縁１６ｄを備える。   The negative electrode 16 includes a first edge 16a along the protruding long side of the negative electrode tab 17a. The negative electrode tab 17a has a shape protruding from the middle of the first edge 16a. The negative electrode 16 includes a second edge 16b on the long side opposite to the first edge 16a. Further, the negative electrode 16 includes a third edge 16c on a short side connecting one ends of the first edge 16a and the second edge 16b, and the other ends of the first edge 16a and the second edge 16b are connected to each other. A fourth edge 16d is provided on the short side to be connected.

負極電極１６の隣り合う２辺（長辺及び短辺）の長さは、正極電極１３の隣り合う２辺（長辺及び短辺）の長さより長く、負極電極１６は、正極電極１３より一回り大きい。また、負極活物質層１８の隣り合う２辺（長辺及び短辺）の長さは、正極活物質層１５の隣り合う２辺（長辺及び短辺）の長さより長く、負極活物質層１８は、正極活物質層１５より一回り大きい。なお、セパレータ２４の平面形状は、負極電極１６の平面形状と同じであり、正極電極１３より一回り大きい。   The length of two adjacent sides (long side and short side) of the negative electrode 16 is longer than the length of two adjacent sides (long side and short side) of the positive electrode 13, and the negative electrode 16 is longer than the positive electrode 13. Around big. Further, the length of two adjacent sides (long side and short side) of the negative electrode active material layer 18 is longer than the length of two adjacent sides (long side and short side) of the positive electrode active material layer 15, and the negative electrode active material layer 18 is slightly larger than the positive electrode active material layer 15. The planar shape of the separator 24 is the same as the planar shape of the negative electrode 16 and is slightly larger than the positive electrode 13.

次に、電極製造設備３０について説明する。
図３（ａ）及び図４に示すように、電極製造設備３０は、帯状の電極材料２０を個片の正極電極１３又は負極電極１６の形状に切断する切断工程を行うための設備である。電極製造設備３０には、電極材料２０が供給される。 Next, the electrode manufacturing equipment 30 will be described.
As shown in FIG. 3A and FIG. 4, the electrode manufacturing facility 30 is a facility for performing a cutting process for cutting the strip-shaped electrode material 20 into the shape of the individual positive electrode 13 or negative electrode 16. The electrode material 20 is supplied to the electrode manufacturing facility 30.

搬送方向Ｄ１は、電極製造設備３０において、電極材料２０が搬送される方向を示している。搬送方向Ｄ１は、電極材料２０の長手方向と一致する。また、幅方向Ｄ２は、電極材料２０の面に沿う方向のうち、搬送方向Ｄ１と直交する方向を示している。   The transport direction D <b> 1 indicates the direction in which the electrode material 20 is transported in the electrode manufacturing facility 30. The transport direction D1 coincides with the longitudinal direction of the electrode material 20. Moreover, the width direction D2 has shown the direction orthogonal to the conveyance direction D1 among the directions along the surface of the electrode material 20. FIG.

ここで、電極材料２０について説明する。
図３（ｂ）及び図４に示すように、帯状の電極材料２０は帯状集電箔２１と、帯状集電箔２１の一方の面に存在する第１の塗工部２２ａ及び他方の面に存在する第２の塗工部２２ｂと、を備える。正極電極１３用の電極材料２０においては、帯状集電箔２１は正極集電箔１４となる部位であり、負極電極１６用の電極材料２０においては、帯状集電箔２１は負極集電箔１７となる部位である。また、正極電極１３用の電極材料２０においては、各塗工部２２ａ，２２ｂは正極活物質層１５となる部位であり、負極電極１６用の電極材料２０においては、各塗工部２２ａ，２２ｂは負極活物質層１８となる部位である。 Here, the electrode material 20 will be described.
As shown in FIGS. 3B and 4, the strip-shaped electrode material 20 is formed on the strip-shaped current collector foil 21, the first coating portion 22 a existing on one surface of the strip-shaped current collector foil 21, and the other surface. And an existing second coating part 22b. In the electrode material 20 for the positive electrode 13, the strip-shaped current collector foil 21 is a portion to be the positive current collector foil 14. In the electrode material 20 for the negative electrode 16, the strip-shaped current collector foil 21 is the negative electrode current collector foil 17. It is a part to become. Further, in the electrode material 20 for the positive electrode 13, the coating portions 22 a and 22 b are portions to be the positive electrode active material layer 15, and in the electrode material 20 for the negative electrode 16, the coating portions 22 a and 22 b. Is a portion to be the negative electrode active material layer 18.

各塗工部２２ａ，２２ｂは、活物質、導電剤、溶媒及びバインダを混合したペースト状の活物質合剤を帯状集電箔２１の表面に塗布し、乾燥した後、加圧して形成されている。各塗工部２２ａ，２２ｂは、電極材料２０の長手方向に沿って、帯状に一定の幅で延びている。また、電極材料２０は、電極材料２０の長手方向に沿って存在する露出部２３を備える。本実施形態では、電極材料２０は、両方の長縁部Ｅ１，Ｅ２に沿って存在する露出部２３を備える。各露出部２３は、帯状集電箔２１の長手方向に沿って一定幅で露出している。露出部２３は、帯状集電箔２１において塗工部２２ａ，２２ｂが存在しない部位であり、帯状集電箔２１が露出した部分である。第１の塗工部２２ａ及び第２の塗工部２２ｂに対し、露出部２３は電極材料２０の幅方向Ｄ２に隣接している。本実施形態では、電極材料２０の幅方向Ｄ２に沿って、一方の露出部２３、塗工部２２ａ，２２ｂ及び他方の露出部２３が並んでいる。   Each coating part 22a, 22b is formed by applying a paste-like active material mixture, which is a mixture of an active material, a conductive agent, a solvent and a binder, to the surface of the strip-shaped current collector foil 21, drying, and then pressurizing. Yes. Each coating part 22a, 22b extends along the longitudinal direction of the electrode material 20 in a band shape with a certain width. The electrode material 20 includes an exposed portion 23 that exists along the longitudinal direction of the electrode material 20. In the present embodiment, the electrode material 20 includes an exposed portion 23 that exists along both of the long edge portions E1 and E2. Each exposed portion 23 is exposed with a constant width along the longitudinal direction of the strip-shaped current collector foil 21. The exposed portion 23 is a portion where the coating portions 22a and 22b do not exist in the strip-shaped current collector foil 21, and is a portion where the strip-shaped current collector foil 21 is exposed. The exposed portion 23 is adjacent to the width direction D2 of the electrode material 20 with respect to the first coating portion 22a and the second coating portion 22b. In the present embodiment, one exposed portion 23, the coating portions 22a and 22b, and the other exposed portion 23 are arranged along the width direction D2 of the electrode material 20.

電極製造設備３０について詳しく説明する。
図３（ａ）及び図４に示すように、電極製造設備３０は、電極材料２０を供給する供給部３１を備える。供給部３１は、ロール状に捲回された電極材料２０を支持するホルダ３２を備える。ホルダ３２は、電極材料２０の搬送速度にあわせて、電極材料２０を送出する。電極製造設備３０は、電極材料２０を搬送する円柱状の搬送ロール３３を、電極材料２０を挟んで一対備える。搬送ロール３３の軸心は、幅方向Ｄ２に沿って延びる。搬送ロール３３は、図示しない駆動装置によって軸心まわりで回転する。なお、電極材料２０は、第２の塗工部２２ｂが下側になる状態で搬送される。 The electrode manufacturing facility 30 will be described in detail.
As shown in FIG. 3A and FIG. 4, the electrode manufacturing facility 30 includes a supply unit 31 that supplies the electrode material 20. The supply unit 31 includes a holder 32 that supports the electrode material 20 wound in a roll shape. The holder 32 delivers the electrode material 20 in accordance with the conveying speed of the electrode material 20. The electrode manufacturing facility 30 includes a pair of cylindrical transport rollers 33 that transport the electrode material 20 with the electrode material 20 interposed therebetween. The axis of the transport roll 33 extends along the width direction D2. The transport roll 33 is rotated around the axis by a driving device (not shown). In addition, the electrode material 20 is conveyed in the state in which the 2nd coating part 22b becomes a lower side.

電極製造設備３０は、ロータリーダイカッタ３４を備える。ロータリーダイカッタ３４は、電極材料２０を、正極電極１３又は負極電極１６の外形に沿って予め決められた切断予定線２０ａで切断するための装置である。切断予定線２０ａは、電極材料２０において、切断が予定されている部位である。この実施形態において、切断予定線２０ａは、予め定めた形状である正極電極１３又は負極電極１６の輪郭と同一の形状であり、閉環状である。   The electrode manufacturing facility 30 includes a rotary die cutter 34. The rotary die cutter 34 is a device for cutting the electrode material 20 along a predetermined cutting line 20 a along the outer shape of the positive electrode 13 or the negative electrode 16. The planned cutting line 20a is a part of the electrode material 20 where cutting is planned. In this embodiment, the planned cutting line 20a has the same shape as the contour of the positive electrode 13 or the negative electrode 16 that is a predetermined shape, and is a closed ring.

図５（ａ）に示すように、正極電極１３の切断予定線２０ａのうち、正極電極１３の第１の縁１３ａ及び正極タブ１４ａに対応した部分は、露出部２３上に設定され、第１の縁１３ａは搬送方向Ｄ１に延び、正極タブ１４ａは搬送方向Ｄ１及び幅方向Ｄ２に延びる。切断予定線２０ａのうち、正極電極１３の第３の縁１３ｃ及び第４の縁１３ｄに対応した部分は、露出部２３と塗工部２２ａ，２２ｂを横断して設定され、電極材料２０の幅方向Ｄ２に延びる。切断予定線２０ａのうち、正極電極１３の第２の縁１３ｂに対応した部分は、塗工部２２ａ，２２ｂ上に設定され、電極材料２０の搬送方向Ｄ１に延びる。   As shown in FIG. 5A, the portion corresponding to the first edge 13 a and the positive electrode tab 14 a of the positive electrode 13 in the planned cutting line 20 a of the positive electrode 13 is set on the exposed portion 23, and the first The edge 13a extends in the transport direction D1, and the positive electrode tab 14a extends in the transport direction D1 and the width direction D2. Of the planned cutting line 20a, portions corresponding to the third edge 13c and the fourth edge 13d of the positive electrode 13 are set across the exposed portion 23 and the coating portions 22a and 22b, and the width of the electrode material 20 is set. It extends in the direction D2. Of the planned cutting line 20a, a portion corresponding to the second edge 13b of the positive electrode 13 is set on the coating portions 22a and 22b and extends in the transport direction D1 of the electrode material 20.

図５（ｂ）に示すように、負極電極１６の切断予定線２０ａのうち、負極電極１６の第１の縁１６ａ及び負極タブ１７ａの基端側に対応した部分は、塗工部２２ａ，２２ｂに上に設定されている。切断予定線２０ａのうち、第１の縁１６ａに対応した部分は、電極材料２０の搬送方向Ｄ１に延び、負極タブ１７ａの基端側に対応した部分は幅方向Ｄ２に延びる。切断予定線２０ａのうち、負極タブ１７ａの先端側に対応した部分は、露出部２３上に設定されている。切断予定線２０ａのうち、負極電極１６の第３の縁１６ｃ及び第４の縁１６ｄに対応した部分は、塗工部２２ａ，２２ｂ上に設定され、電極材料２０の幅方向Ｄ２に延びる。また、切断予定線２０ａのうち、第２の縁１６ｂに対応した部分は、塗工部２２ａ，２２ｂ上に設定され、電極材料２０の搬送方向Ｄ１に延びる。   As shown in FIG. 5B, portions of the planned cutting line 20a of the negative electrode 16 corresponding to the first edge 16a of the negative electrode 16 and the base end side of the negative electrode tab 17a are coated portions 22a and 22b. Is set on. Of the planned cutting line 20a, a portion corresponding to the first edge 16a extends in the transport direction D1 of the electrode material 20, and a portion corresponding to the base end side of the negative electrode tab 17a extends in the width direction D2. A portion of the planned cutting line 20 a corresponding to the tip side of the negative electrode tab 17 a is set on the exposed portion 23. Of the planned cutting line 20a, portions corresponding to the third edge 16c and the fourth edge 16d of the negative electrode 16 are set on the coating portions 22a and 22b and extend in the width direction D2 of the electrode material 20. Moreover, the part corresponding to the 2nd edge 16b among the cutting cutting lines 20a is set on the coating parts 22a and 22b, and is extended in the conveyance direction D1 of the electrode material 20. FIG.

図４に示すように、ロータリーダイカッタ３４は、ダイロール３５と、アンビルロール４５とを備える。ロータリーダイカッタ３４は、正極電極１３を切り出すための正極用のロータリーダイカッタ３４と、負極電極１６を切り出すための負極用のロータリーダイカッタ３４とを備える。   As shown in FIG. 4, the rotary die cutter 34 includes a die roll 35 and an anvil roll 45. The rotary die cutter 34 includes a positive rotary die cutter 34 for cutting out the positive electrode 13 and a negative rotary die cutter 34 for cutting out the negative electrode 16.

ダイロール３５の軸心、及び、アンビルロール４５の軸心は、幅方向Ｄ２に沿って延び、かつ互いに平行である。ダイロール３５及びアンビルロール４５は、軸心まわりで回転できるように図示しない駆動装置に支持されている。   The axis of the die roll 35 and the axis of the anvil roll 45 extend along the width direction D2 and are parallel to each other. The die roll 35 and the anvil roll 45 are supported by a driving device (not shown) so as to be able to rotate around the axis.

ダイロール３５は、円柱状のロール本体３６と、ロール本体３６の径方向外側に突出する形状の切刃４０とを備え、ロール本体３６が回転することで切刃４０が移動する。切刃４０は、正極電極１３又は負極電極１６の切断予定線２０ａの形状に合わせた閉環状である。切刃４０は、ロール本体３６の周方向に沿って延びる形状の一対の第１刃部４１を備える。   The die roll 35 includes a cylindrical roll body 36 and a cutting blade 40 having a shape protruding outward in the radial direction of the roll body 36, and the cutting blade 40 moves as the roll body 36 rotates. The cutting blade 40 has a closed ring shape that matches the shape of the planned cutting line 20 a of the positive electrode 13 or the negative electrode 16. The cutting blade 40 includes a pair of first blade portions 41 having a shape extending along the circumferential direction of the roll body 36.

また、切刃４０は、一方の第１刃部４１の途中にタブ用刃部４２を備える。タブ用刃部４２は、ロール本体３６の軸方向に沿う一対の長刃４２ａと、ロール本体３６の周方向に沿い、一対の長刃４２ａ同士を繋ぐ短刃４２ｂとを備える。切刃４０は、ロール本体３６の軸方向に沿って周面から突出する形状の一対の第２刃部４３を備える。各第２刃部４３は、一対の第１刃部４１の両端の間で延び、第１刃部４１同士を繋いでいる。   The cutting blade 40 includes a tab blade portion 42 in the middle of one of the first blade portions 41. The tab blade portion 42 includes a pair of long blades 42 a along the axial direction of the roll body 36 and a short blade 42 b that connects the pair of long blades 42 a along the circumferential direction of the roll body 36. The cutting blade 40 includes a pair of second blade portions 43 having a shape protruding from the circumferential surface along the axial direction of the roll body 36. Each 2nd blade part 43 is extended between the both ends of a pair of 1st blade part 41, and has connected 1st blade part 41 comrades.

正極用のダイロール３５において、第１刃部４１の長手方向への長さは、正極電極１３の第１の縁１３ａ及び第２の縁１３ｂの長さと同じである。また、第２刃部４３の長手方向への長さは、正極電極１３の第３の縁１３ｃ及び第４の縁１３ｄの長さと同じである。加えて、タブ用刃部４２の形状は、正極タブ１４ａの形状と同じである。   In the positive electrode die roll 35, the length of the first blade portion 41 in the longitudinal direction is the same as the lengths of the first edge 13 a and the second edge 13 b of the positive electrode 13. The length of the second blade portion 43 in the longitudinal direction is the same as the lengths of the third edge 13c and the fourth edge 13d of the positive electrode 13. In addition, the shape of the tab blade portion 42 is the same as the shape of the positive electrode tab 14a.

負極用のダイロール３５において、第１刃部４１の長手方向への長さは、負極電極１６の第１の縁１６ａ及び第２の縁１６ｂの長さと同じである。また、第２刃部４３の長手方向への長さは、負極電極１６の第３の縁１６ｃ及び第４の縁１６ｄの長さと同じである。加えて、タブ用刃部４２の形状は、負極タブ１７ａの形状と同じである。   In the negative electrode die roll 35, the length of the first blade portion 41 in the longitudinal direction is the same as the lengths of the first edge 16 a and the second edge 16 b of the negative electrode 16. The length of the second blade portion 43 in the longitudinal direction is the same as the lengths of the third edge 16c and the fourth edge 16d of the negative electrode 16. In addition, the shape of the tab blade portion 42 is the same as the shape of the negative electrode tab 17a.

図６（ｂ）又は図８（ｂ）に示すように、切刃４０の先端とアンビルロール４５の周面が最接近した状態では、切刃４０の先端とアンビルロール４５の周面との間にはクリアランスが存在し、切刃４０の先端はアンビルロール４５の周面に接触しない。   As shown in FIG. 6 (b) or FIG. 8 (b), when the tip of the cutting blade 40 and the peripheral surface of the anvil roll 45 are closest, the gap between the tip of the cutting blade 40 and the peripheral surface of the anvil roll 45 is shown. There is a clearance, and the tip of the cutting edge 40 does not contact the peripheral surface of the anvil roll 45.

図６（ａ）又は図８（ａ）に示すように、ロータリーダイカッタ３４は、アンビルロール４５の軸方向両端に嵩上げ部４６を備える。嵩上げ部４６は、樹脂製の帯材をアンビルロール４５の周面に貼り付けて形成されている。アンビルロール４５の径方向に沿った嵩上げ部４６の寸法を厚みとする。正極用のロータリーダイカッタ３４において、嵩上げ部４６の厚みは、正極の電極材料２０の塗工部２２ａ，２２ｂの厚みと同じに設定され、負極用のロータリーダイカッタ３４において、嵩上げ部４６の厚みは、負極の電極材料２０の塗工部２２ａ，２２ｂの厚みと同じに設定される。   As shown in FIG. 6A or FIG. 8A, the rotary die cutter 34 includes raised portions 46 at both ends of the anvil roll 45 in the axial direction. The raised portion 46 is formed by sticking a resin band to the peripheral surface of the anvil roll 45. The dimension of the raised portion 46 along the radial direction of the anvil roll 45 is the thickness. In the rotary die cutter 34 for the positive electrode, the thickness of the raised portion 46 is set to be the same as the thickness of the coating portions 22a and 22b of the electrode material 20 for the positive electrode, and in the rotary die cutter 34 for the negative electrode, the thickness of the raised portion 46 is set. Is set equal to the thickness of the coating portions 22a and 22b of the negative electrode material 20.

電極材料２０は、第２の塗工部２２ｂがアンビルロール４５に支持される状態で、ダイロール３５とアンビルロール４５の間を通過する。このとき、各露出部２３は、嵩上げ部４６の上に載る状態でダイロール３５とアンビルロール４５の間を通過する。よって、第２の塗工部２２ｂの厚みによって、露出部２３がアンビルロール４５の周面より高い位置にあっても、露出部２３は嵩上げ部４６によってアンビルロール４５の周面から嵩上げされる。また、アンビルロール４５の軸方向において、嵩上げ部４６は、第２の塗工部２２ｂの長手方向に沿う縁から離れた位置にあり、アンビルロール４５の軸方向に沿って、第２の塗工部２２ｂと嵩上げ部４６との間には隙間Ｓが形成される。   The electrode material 20 passes between the die roll 35 and the anvil roll 45 in a state where the second coating part 22 b is supported by the anvil roll 45. At this time, each exposed portion 23 passes between the die roll 35 and the anvil roll 45 while being placed on the raised portion 46. Therefore, even if the exposed portion 23 is located higher than the peripheral surface of the anvil roll 45 due to the thickness of the second coating portion 22 b, the exposed portion 23 is raised from the peripheral surface of the anvil roll 45 by the raised portion 46. Further, in the axial direction of the anvil roll 45, the raised portion 46 is located away from the edge along the longitudinal direction of the second coating portion 22 b, and the second coating is performed along the axial direction of the anvil roll 45. A gap S is formed between the portion 22b and the raised portion 46.

図６（ｂ）に示すように、正極の電極材料２０を切断する場合、隙間Ｓには、タブ用刃部４２に繋がる一方の第１刃部４１が対峙する。一方、図８（ｂ）に示すように、負極の電極材料２０を切断する場合、隙間Ｓには、タブ用刃部４２における一対の長刃４２ａの基端側が対峙する。   As shown in FIG. 6B, when the positive electrode material 20 is cut, one first blade portion 41 connected to the tab blade portion 42 faces the gap S. On the other hand, as shown in FIG. 8B, when the negative electrode material 20 is cut, the base end sides of the pair of long blades 42 a in the tab blade portion 42 face each other in the gap S.

図３（ａ）に示すように、電極製造設備３０は、電極材料２０から正極電極１３又は負極電極１６を切り出す切断機構５０を備える。切断機構５０は、円柱状の分離ロール５１を備える。分離ロール５１の軸心は、幅方向Ｄ２に沿って延びる。分離ロール５１は、軸心まわりで回転できるように図示しない駆動装置に支持されている。   As shown in FIG. 3A, the electrode manufacturing facility 30 includes a cutting mechanism 50 that cuts out the positive electrode 13 or the negative electrode 16 from the electrode material 20. The cutting mechanism 50 includes a cylindrical separation roll 51. The axis of the separation roll 51 extends along the width direction D2. The separation roll 51 is supported by a drive device (not shown) so that it can rotate around its axis.

分離ロール５１は、切り出される正極電極１３又は負極電極１６を第１方向としての搬送方向Ｄ１へ案内する。搬送方向Ｄ１は、電極材料２０の搬送方向Ｄ１と一致している。その一方で、分離ロール５１は、正極電極１３又は負極電極１６が分離された電極材料２０の残部である端材５４を、搬送方向Ｄ１とは異なる第２方向としての搬送方向Ｄ３へ案内する。この実施形態において、端材５４は、切断予定線２０ａより外側の部分であり、正極電極１３又は負極電極１６と異なる部分である。電極製造設備３０は、切り出された正極電極１３又は負極電極１６を搬送方向Ｄ１へ搬送する搬送装置５２を備える。   The separation roll 51 guides the positive electrode 13 or the negative electrode 16 to be cut out in the transport direction D1 as the first direction. The transport direction D1 coincides with the transport direction D1 of the electrode material 20. On the other hand, the separation roll 51 guides the end material 54, which is the remaining part of the electrode material 20 from which the positive electrode 13 or the negative electrode 16 is separated, in a transport direction D3 as a second direction different from the transport direction D1. In this embodiment, the end material 54 is a portion outside the planned cutting line 20 a and is a portion different from the positive electrode 13 or the negative electrode 16. The electrode manufacturing facility 30 includes a transport device 52 that transports the cut out positive electrode 13 or negative electrode 16 in the transport direction D1.

次に、電極製造設備３０による正極電極１３又は負極電極１６の製造方法を作用とともに記載する。
電極材料２０を、個片の正極電極１３又は負極電極１６の形状に切断する切断工程を行う際、図６（ａ）に示すように、正極の電極材料２０は、第２の塗工部２２ｂがアンビルロール４５に支持されるとともに、露出部２３が嵩上げ部４６に支持される状態で、ダイロール３５とアンビルロール４５の間を通過する。切断工程では、嵩上げ部４６により、露出部２３をアンビルロール４５の周面から嵩上げしつつ、切刃４０の形状に沿って電極材料２０の切断を行う。 Next, the manufacturing method of the positive electrode 13 or the negative electrode 16 by the electrode manufacturing facility 30 will be described together with the operation.
When performing the cutting process which cuts the electrode material 20 into the shape of the piece positive electrode 13 or the negative electrode 16, as shown to Fig.6 (a), the positive electrode material 20 is the 2nd coating part 22b. Is supported by the anvil roll 45 and the exposed portion 23 is supported by the raised portion 46 and passes between the die roll 35 and the anvil roll 45. In the cutting step, the electrode material 20 is cut along the shape of the cutting blade 40 while the exposed portion 23 is raised from the peripheral surface of the anvil roll 45 by the raised portion 46.

図７の２点鎖線に示すように、切刃４０のうち、タブ用刃部４２に繋がる一方の第１刃部４１及びタブ用刃部４２は露出部２３に押し込まれ、他方の第１刃部４１、及び一対の第２刃部４３は、第１の塗工部２２ａに押し込まれる。   As shown by a two-dot chain line in FIG. 7, of the cutting blades 40, one first blade portion 41 and the tab blade portion 42 connected to the tab blade portion 42 are pushed into the exposed portion 23, and the other first blade The part 41 and the pair of second blade parts 43 are pushed into the first coating part 22a.

このとき、他方の第１刃部４１及び一対の第２刃部４３は、第１の塗工部２２ａ及び帯状集電箔２１を貫通するが、第２の塗工部２２ｂは貫通しない。しかし、切刃４０の進入により、第２の塗工部２２ｂは割れ、正極電極１３の第２の縁１３ｂ、第３の縁１３ｃ、及び第４の縁１３ｄに沿う部分は全切断される。   At this time, the other first blade portion 41 and the pair of second blade portions 43 penetrate the first coating portion 22a and the strip-shaped current collector foil 21, but do not penetrate the second coating portion 22b. However, as the cutting edge 40 enters, the second coating portion 22b breaks, and the portions along the second edge 13b, the third edge 13c, and the fourth edge 13d of the positive electrode 13 are completely cut.

また、図６（ｂ）に示すように、タブ用刃部４２に繋がる一方の第１刃部４１は、露出部２３に押し当てられながら隙間Ｓに逃げ込み、露出部２３を隙間Ｓに向けて押し込みながら切る。このとき、嵩上げ部４６の厚みは、切刃４０がアンビルロール４５の周面に最接近したときのクリアランスより大きい。このため、露出部２３は、隙間Ｓに押し込まれながらも、嵩上げ部４６によって切刃４０の届く位置まで嵩上げされており、露出部２３には切れ込み２３ａが形成される。   Further, as shown in FIG. 6B, one first blade portion 41 connected to the tab blade portion 42 escapes into the gap S while being pressed against the exposed portion 23, and the exposed portion 23 faces the gap S. Cut while pushing. At this time, the thickness of the raised portion 46 is larger than the clearance when the cutting edge 40 is closest to the peripheral surface of the anvil roll 45. For this reason, the exposed portion 23 is raised to the position where the cutting edge 40 reaches by the raised portion 46 while being pushed into the gap S, and a cut 23 a is formed in the exposed portion 23.

その結果、露出部２３のうち、隙間Ｓに押し込まれた部分には、電極材料２０の長手方向に沿って切れ込み２３ａが形成され、全切断はされない。よって、図７に示すように、正極電極１３の第１の縁１３ａに沿う部分には、切れ込み２３ａが形成されるとともに、金属箔のみで形成された非切断部２３ｂが形成される。非切断部２３ｂは、切断前の露出部２３の厚みより薄く、切断前と比べて破断されやすくなった部分である。   As a result, a portion of the exposed portion 23 that is pushed into the gap S is formed with a cut 23a along the longitudinal direction of the electrode material 20, and is not completely cut. Therefore, as shown in FIG. 7, a notch 23 a is formed in the portion along the first edge 13 a of the positive electrode 13, and an uncut portion 23 b formed only of the metal foil is formed. The non-cut portion 23b is a portion that is thinner than the exposed portion 23 before cutting and is more easily broken than before cutting.

また、タブ用刃部４２は、露出部２３に押し当てられると、露出部２３を嵩上げ部４６に向けて押し込み、露出部２３を全切断する。
その結果、図７の実線に示すように、正極電極１３のうち、正極タブ１４ａ、第２の縁１３ｂ、第３の縁１３ｃ、及び第４の縁１３ｄに沿う部分は全切断される。その一方で、図７の２点鎖線に示すように、第１の縁１３ａに沿う部分のみが、非切断部２３ｂによって電極材料２０と繋がった状態となる。 In addition, when the tab blade portion 42 is pressed against the exposed portion 23, the exposed portion 23 is pushed toward the raised portion 46 to completely cut the exposed portion 23.
As a result, as shown by the solid line in FIG. 7, portions of the positive electrode 13 along the positive electrode tab 14 a, the second edge 13 b, the third edge 13 c, and the fourth edge 13 d are completely cut. On the other hand, as shown by a two-dot chain line in FIG. 7, only the portion along the first edge 13a is connected to the electrode material 20 by the non-cutting portion 23b.

図８（ａ）に示すように、負極の電極材料２０は、第２の塗工部２２ｂがアンビルロール４５に支持されるとともに、露出部２３が嵩上げ部４６に支持される状態で、ダイロール３５とアンビルロール４５の間を通過する。切断工程では、嵩上げ部４６により、露出部２３をアンビルロール４５の周面から嵩上げしつつ、切刃４０の形状に沿って電極材料２０の切断を行う。   As shown in FIG. 8 (a), the negative electrode material 20 has a die roll 35 in a state where the second coating portion 22b is supported by the anvil roll 45 and the exposed portion 23 is supported by the raised portion 46. And anvil roll 45. In the cutting step, the electrode material 20 is cut along the shape of the cutting blade 40 while the exposed portion 23 is raised from the peripheral surface of the anvil roll 45 by the raised portion 46.

図９の２点鎖線に示すように、切刃４０のうち、タブ用刃部４２の長刃４２ａの基端部、一対の第１刃部４１及び一対の第２刃部４３は第１の塗工部２２ａに押し込まれる。このとき、長刃４２ａの基端部、一対の第１刃部４１及び一対の第２刃部４３は、第１の塗工部２２ａ及び帯状集電箔２１を貫通するが、第２の塗工部２２ｂは貫通しない。しかし、切刃４０の進入により、第２の塗工部２２ｂは割れ、負極タブ１７ａの基端部、第１の縁１６ａ、第２の縁１６ｂ、第３の縁１６ｃ、及び第４の縁１６ｄに沿う部分は全切断される。   As shown by a two-dot chain line in FIG. 9, among the cutting blades 40, the base end portion of the long blade 42a of the tab blade portion 42, the pair of first blade portions 41, and the pair of second blade portions 43 are the first. It is pushed into the coating part 22a. At this time, the proximal end portion of the long blade 42a, the pair of first blade portions 41, and the pair of second blade portions 43 penetrate the first coating portion 22a and the strip-shaped current collector foil 21, but the second coating portion 21a. The engineering part 22b does not penetrate. However, as the cutting edge 40 enters, the second coating portion 22b breaks, the base end of the negative electrode tab 17a, the first edge 16a, the second edge 16b, the third edge 16c, and the fourth edge. The part along 16d is completely cut.

また、図８（ｂ）に示すように、タブ用刃部４２のうち、一対の長刃４２ａの先端部及び短刃４２ｂは、露出部２３に押し当てられると、露出部２３を嵩上げ部４６に向けて押し込み、露出部２３を全切断する。   Further, as shown in FIG. 8B, when the tip end portion of the pair of long blades 42 a and the short blade 42 b of the tab blade portion 42 are pressed against the exposed portion 23, the exposed portion 23 is raised to the raised portion 46. The exposed portion 23 is completely cut.

また、タブ用刃部４２のうち、一対の長刃４２ａの一部は、露出部２３に押し当てられながら隙間Ｓに逃げ込み、露出部２３を隙間Ｓに向けて押し込みながら切る。このとき、嵩上げ部４６の厚みは、切刃４０がアンビルロール４５の周面に最接近したときのクリアランスより大きい。このため、露出部２３は、隙間Ｓに押し込まれながらも、嵩上げ部４６によって切刃４０の届く位置まで嵩上げされており、露出部２３に切れ込み２３ａを形成することができる。   In addition, a part of the pair of long blades 42 a out of the tab blade portion 42 escapes into the gap S while being pressed against the exposed portion 23, and cuts while pushing the exposed portion 23 toward the gap S. At this time, the thickness of the raised portion 46 is larger than the clearance when the cutting edge 40 is closest to the peripheral surface of the anvil roll 45. For this reason, while the exposed portion 23 is pushed into the gap S, the exposed portion 23 is raised to a position where the cutting edge 40 reaches by the raised portion 46, and a cut 23 a can be formed in the exposed portion 23.

その結果、露出部２３のうち、隙間Ｓに押し込まれた部分には、電極材料２０の幅方向Ｄ２に沿って僅かに切れ込み２３ａが形成され、全切断はされない。このため、負極タブ１７ａに沿う部分には、金属箔のみで形成された非切断部２３ｂが形成される。   As a result, a portion of the exposed portion 23 that is pushed into the gap S is slightly cut 23a along the width direction D2 of the electrode material 20, and is not completely cut. For this reason, the uncut part 23b formed only with metal foil is formed in the part along the negative electrode tab 17a.

その結果、図９の実線に示すように、負極電極１６のうち、負極タブ１７ａの先端部及び基端部、第１の縁１６ａ、第２の縁１６ｂ、第３の縁１６ｃ及び第４の縁１６ｄに沿う部分は全切断される。その一方で、図９の２点鎖線に示すように、負極タブ１７ａに沿う一部が、非切断部２３ｂで電極材料２０と繋がった状態となる。   As a result, as shown by the solid line in FIG. 9, among the negative electrode 16, the leading end and the base end of the negative electrode tab 17 a, the first edge 16 a, the second edge 16 b, the third edge 16 c and the fourth edge The part along the edge 16d is completely cut. On the other hand, as shown by a two-dot chain line in FIG. 9, a part along the negative electrode tab 17a is connected to the electrode material 20 at the non-cut portion 23b.

そして、図３（ａ）に示すように、正極電極１３は、搬送方向Ｄ１の下流側の端部が搬送装置５２に乗ると、正極電極１３が搬送装置５２に引っ張られ、該搬送装置５２に乗り移る。その一方で、図１０に示すように、電極材料２０から正極電極１３が切り出されて残った端材５４は分離ロール５１によって搬送方向Ｄ３へ案内される。   As shown in FIG. 3A, when the downstream end of the positive electrode 13 in the transport direction D1 gets on the transport device 52, the positive electrode 13 is pulled by the transport device 52, and the transport device 52 Change. On the other hand, as shown in FIG. 10, the end material 54 left after the positive electrode 13 is cut out from the electrode material 20 is guided in the transport direction D <b> 3 by the separation roll 51.

端材５４が、正極電極１３の搬送方向と異なる搬送方向Ｄ３へ案内されていくと、非切断部２３ｂに負荷が掛かり、正極電極１３が搬送方向Ｄ１へ案内されていくに連れて非切断部２３ｂが裂けていき、非切断部２３ｂが破断される。その結果、正極電極１３と電極材料２０が分離され、正極電極１３のみが搬送装置５２に乗り移り、搬送される。   When the end material 54 is guided in the conveyance direction D3 different from the conveyance direction of the positive electrode 13, a load is applied to the non-cutting portion 23b, and as the positive electrode 13 is guided in the conveyance direction D1, the non-cutting portion. 23b tears and the non-cut portion 23b is broken. As a result, the positive electrode 13 and the electrode material 20 are separated, and only the positive electrode 13 is transferred to the transport device 52 and transported.

また、負極電極１６は、搬送方向Ｄ１の下流側の端部が搬送装置５２に乗ると、負極電極１６が搬送装置５２に引っ張られ、該搬送装置５２に乗り移る。その一方で、端材５４は分離ロール５１によって搬送方向Ｄ３へ案内される。端材５４が、負極電極１６の搬送方向と異なる搬送方向Ｄ３へ案内されていくと、非切断部２３ｂに負荷が掛かり、負極電極１６が搬送方向Ｄ１へ案内されていくに連れて非切断部２３ｂが破断される。その結果、負極電極１６と電極材料２０が分離され、負極電極１６のみが搬送装置５２に乗り移り、搬送される。   Further, when the downstream end of the negative electrode 16 in the transport direction D <b> 1 gets on the transport device 52, the negative electrode 16 is pulled by the transport device 52 and is transferred to the transport device 52. On the other hand, the end material 54 is guided in the transport direction D3 by the separation roll 51. When the end material 54 is guided in the conveyance direction D3 different from the conveyance direction of the negative electrode 16, a load is applied to the non-cutting portion 23b, and as the negative electrode 16 is guided in the conveyance direction D1, the non-cutting portion. 23b is broken. As a result, the negative electrode 16 and the electrode material 20 are separated, and only the negative electrode 16 is transferred to the transport device 52 and transported.

上記実施形態によれば、以下のような効果を得ることができる。
（１）アンビルロール４５に嵩上げ部４６を設け、電極材料２０がダイロール３５とアンビルロール４５の間を通過する際、嵩上げ部４６によって露出部２３をアンビルロール４５の周面から嵩上げした状態に支持するようにした。また、アンビルロール４５に支持された第２の塗工部２２ｂと嵩上げ部４６との間に隙間Ｓを空けた。 According to the above embodiment, the following effects can be obtained.
(1) A raised portion 46 is provided on the anvil roll 45, and when the electrode material 20 passes between the die roll 35 and the anvil roll 45, the exposed portion 23 is supported by the raised portion 46 so as to be raised from the peripheral surface of the anvil roll 45. I tried to do it. Further, a gap S was made between the second coating portion 22 b supported by the anvil roll 45 and the raised portion 46.

そして、正極電極１３を電極材料２０から切り出す際は、露出部２３を押す第１刃部４１を隙間Ｓに逃がすことで、露出部２３に非切断部２３ｂを形成することができる。また、負極電極１６を切り出す際は、露出部２３を押すタブ用刃部４２の一部を隙間Ｓに逃がすことで、露出部２３に非切断部２３ｂを形成することができる。   When the positive electrode 13 is cut out from the electrode material 20, the uncut portion 23 b can be formed in the exposed portion 23 by allowing the first blade portion 41 that presses the exposed portion 23 to escape into the gap S. Further, when cutting the negative electrode 16, the non-cut portion 23 b can be formed in the exposed portion 23 by letting a part of the tab blade portion 42 that pushes the exposed portion 23 into the gap S.

このため、正極電極１３又は負極電極１６が搬送装置５２に乗り移る際、搬送装置５２に正極電極１３又は負極電極１６の端部が接触することによって、正極電極１３又は負極電極１６が力を受けても姿勢がバラツクことを抑制できる。したがって、切断工程の後工程で、切り出された正極電極１３又は負極電極１６を収容具に集積する場合、又は積層装置において積層を行う場合に、正極電極１３又は負極電極１６の姿勢を整える必要もなく、姿勢を整えるための装置・工程も必要がない。   For this reason, when the positive electrode 13 or the negative electrode 16 is transferred to the transport device 52, the positive electrode 13 or the negative electrode 16 receives a force when the end of the positive electrode 13 or the negative electrode 16 comes into contact with the transport device 52. Can also prevent the posture from fluctuating. Therefore, when the cut positive electrode 13 or the negative electrode 16 is accumulated in the container in the subsequent process of the cutting process, or when stacking is performed in the stacking apparatus, the posture of the positive electrode 13 or the negative electrode 16 needs to be adjusted. In addition, there is no need for a device or process for adjusting the posture.

（２）ロータリーダイカッタ３４によって正極電極１３又は負極電極１６を電極材料２０から切り出す際は、第１刃部４１を隙間Ｓに逃がすことで、露出部２３に切れ込み２３ａを形成しつつ、非切断部２３ｂを形成することができる。切れ込み２３ａが形成されることで非切断部２３ｂの厚みは、切断前の露出部２３の厚みより薄くなっており、正極電極１３又は負極電極１６と端材５４とを簡単に分離することができる。   (2) When the positive electrode 13 or the negative electrode 16 is cut out from the electrode material 20 by the rotary die cutter 34, the first blade portion 41 is allowed to escape into the gap S, so that the cut portion 23a is formed in the exposed portion 23 and is not cut. The part 23b can be formed. By forming the notch 23a, the thickness of the non-cut portion 23b is thinner than the thickness of the exposed portion 23 before cutting, and the positive electrode 13 or the negative electrode 16 and the end material 54 can be easily separated. .

（３）正極の電極材料２０を切断する際、非切断部２３ｂを電極材料２０の搬送方向Ｄ１に沿って露出部２３に形成する。このため、正極電極１３が搬送方向Ｄ１に搬送されていくのに合わせて、非切断部２３ｂが裂けながら破断していく。よって、正極電極１３の第１の縁１３ａにバリ等を発生させずに切り出すことができる。   (3) When the positive electrode material 20 is cut, an uncut portion 23 b is formed in the exposed portion 23 along the transport direction D <b> 1 of the electrode material 20. For this reason, as the positive electrode 13 is transported in the transport direction D1, the uncut portion 23b is broken while being torn. Therefore, the first edge 13a of the positive electrode 13 can be cut out without generating burrs or the like.

（４）正極電極１３又は負極電極１６として切り出される部分と、その他の部分（端材５４）とが、露出部２３の非切断部２３ｂのみで繋がっている。そして、正極電極１３又は負極電極１６が搬送装置５２に乗り移ると、正極電極１３又は負極電極１６と端材５４との案内方向が異なるため、非切断部２３ｂに負荷が付与される。この負荷によって、非切断部２３ｂが破断する。このため、簡単な構成により、正極電極１３又は負極電極１６と端材５４とを簡単に分離することができる。   (4) The part cut out as the positive electrode 13 or the negative electrode 16 and the other part (end material 54) are connected only by the uncut part 23b of the exposed part 23. And if the positive electrode 13 or the negative electrode 16 transfers to the conveyance apparatus 52, since the guide direction of the positive electrode 13 or the negative electrode 16 and the end material 54 differs, a load is provided to the non-cut | disconnecting part 23b. Due to this load, the non-cut portion 23b is broken. For this reason, the positive electrode 13 or the negative electrode 16 and the end material 54 can be easily separated with a simple configuration.

（５）嵩上げ部４６の厚みは、切刃４０がアンビルロール４５の周面に最接近したときのクリアランスより大きい。このため、嵩上げ部４６により、露出部２３を切刃４０の届く位置まで嵩上げすることができ、切れ込み２３ａ及び非切断部２３ｂを形成することができる。   (5) The thickness of the raised portion 46 is larger than the clearance when the cutting edge 40 is closest to the peripheral surface of the anvil roll 45. For this reason, the exposed part 23 can be raised to the position where the cutting blade 40 reaches by the raised part 46, and the notch 23a and the non-cut part 23b can be formed.

（６）嵩上げ部４６は、アンビルロール４５の周方向の全体に亘って予め貼り付けられている。このため、アンビルロール４５の周方向のいずれの場所であっても露出部２３を嵩上げすることができる。   (6) The raised portion 46 is affixed in advance over the entire circumferential direction of the anvil roll 45. For this reason, the exposed portion 23 can be raised at any location in the circumferential direction of the anvil roll 45.

（７）負極電極１６を切り出す際、非切断部２３ｂは、電極材料２０の幅方向Ｄ２に沿うように短く形成される。負極電極１６は、正極電極１３と異なり、未塗工部が存在しない。このため、露出部２３から切り出される部分は、負極タブ１７ａに沿う部分だけであり、電極材料２０の幅方向Ｄ２に沿う部分になる。負極電極１６が搬送装置５２に乗り移る際、幅方向Ｄ２に沿う部分は破断しにくい。よって、負極電極１６に関しては、非切断部２３ｂを短くすることで、端材５４からの分離が行いやすくなる。   (7) When cutting the negative electrode 16, the non-cut portion 23 b is formed to be short along the width direction D <b> 2 of the electrode material 20. Unlike the positive electrode 13, the negative electrode 16 has no uncoated portion. For this reason, the part cut out from the exposed part 23 is only a part along the negative electrode tab 17a, and becomes a part along the width direction D2 of the electrode material 20. When the negative electrode 16 is transferred to the transport device 52, the portion along the width direction D2 is not easily broken. Therefore, the negative electrode 16 can be easily separated from the end material 54 by shortening the non-cut portion 23b.

（８）非切断部２３ｂは帯状集電箔２１に形成される。このため、非切断部２３ｂが破断されても活物質粒子といった異物が発生しない。
（９）非切断部２３ｂを露出部２３に形成し、第２の塗工部２２ｂに形成しない。第２の塗工部２２ｂに非切断部２３ｂを形成するには、切刃４０の進入時に第２の塗工部２２ｂが割れないようにする必要があり、非切断部２３ｂの厚みが厚くなりやすい。すると、非切断部２３ｂを破断した際、活物質粒子等の異物が発生しやすくなる。よって、露出部２３に非切断部２３ｂを形成するのが好ましい。 (8) The non-cut portion 23 b is formed on the strip-shaped current collector foil 21. For this reason, even if the non-cut portion 23b is broken, foreign substances such as active material particles are not generated.
(9) The non-cut portion 23b is formed in the exposed portion 23 and not formed in the second coating portion 22b. In order to form the non-cutting part 23b in the second coating part 22b, it is necessary to prevent the second coating part 22b from cracking when the cutting blade 40 enters, and the thickness of the non-cutting part 23b increases. Cheap. Then, when the non-cut portion 23b is broken, foreign substances such as active material particles are easily generated. Therefore, it is preferable to form the uncut portion 23 b in the exposed portion 23.

（１０）第２の塗工部２２ｂの厚み分、アンビルロール４５の周面より高い位置にある露出部２３であっても、嵩上げ部４６によって嵩上げされる。このため、露出部２３が垂れることを無くし、露出部２３が切り易くなる。そして、嵩上げ部４６によって露出部２３を嵩上げする際に隙間Ｓを形成することで、露出部２３における隙間Ｓと対応した位置に非切断部２３ｂを形成し、搬送中であっても切り出した正極電極１３又は負極電極１６の位置決めができる。   (10) Even the exposed portion 23 located higher than the peripheral surface of the anvil roll 45 by the thickness of the second coating portion 22 b is raised by the raising portion 46. For this reason, the exposed portion 23 is prevented from dripping, and the exposed portion 23 is easily cut. Then, when the exposed portion 23 is raised by the raised portion 46, the gap S is formed, so that the non-cut portion 23b is formed at a position corresponding to the gap S in the exposed portion 23. The electrode 13 or the negative electrode 16 can be positioned.

なお、上記実施形態は以下のように変更してもよい。
○ 樹脂製の帯材をアンビルロール４５の周面に貼り付けて嵩上げ部４６を形成したが、嵩上げ部４６は、アンビルロール４５と別体とされていてもよい。 In addition, you may change the said embodiment as follows.
O Although the raised portion 46 was formed by pasting a resin band on the peripheral surface of the anvil roll 45, the raised portion 46 may be separated from the anvil roll 45.

図１１に示すように、嵩上げ部としての樹脂テープ４７を露出部２３に押し付けた状態でアンビルロール４５の周面を通過させて、露出部２３をアンビルロール４５の周面から嵩上げするようにしてもよい。この場合、電極製造設備３０は、樹脂テープ４７を送り出す供給ローラ４８と、送り出された樹脂テープ４７を巻き取る巻取ローラ４９とを備える。また、電極製造設備３０は、樹脂テープ４７を露出部２３に押し付けるニップローラ５５をロータリーダイカッタ３４より上流側に備える。   As shown in FIG. 11, the peripheral portion of the anvil roll 45 is passed in a state where the resin tape 47 as the raised portion is pressed against the exposed portion 23, and the exposed portion 23 is raised from the peripheral surface of the anvil roll 45. Also good. In this case, the electrode manufacturing facility 30 includes a supply roller 48 that sends out the resin tape 47 and a take-up roller 49 that winds up the sent resin tape 47. Further, the electrode manufacturing facility 30 includes a nip roller 55 that presses the resin tape 47 against the exposed portion 23 on the upstream side of the rotary die cutter 34.

そして、露出部２３に樹脂テープ４７が押し付けられた状態で、樹脂テープ４７をダイロール３５とアンビルロール４５の間を通過させ、樹脂テープ４７により、露出部２３を嵩上げしてもよい。   Then, the resin tape 47 may be passed between the die roll 35 and the anvil roll 45 in a state where the resin tape 47 is pressed against the exposed portion 23, and the exposed portion 23 may be raised by the resin tape 47.

○ 樹脂製の帯材をアンビルロール４５の周面に貼り付けて嵩上げ部４６を形成したが、嵩上げ部４６は、アンビルロール４５と別体とされていてもよい。
図１２に示すように、アンビルロール４５の軸と平行な状態に供給ローラ５６を配置し、その供給ローラ５６とアンビルロール４５に無端ベルト５７を巻装する。無端ベルト５７を樹脂製とし、嵩上げ部とする。そして、供給ローラ５６を図示しない駆動装置により、アンビルロール４５と同じ方向に回転させ、無端ベルト５７をアンビルロール４５と同期して回転させる。すると、無端ベルト５７により、露出部２３が嵩上げされる。 O Although the raised portion 46 was formed by pasting a resin band on the peripheral surface of the anvil roll 45, the raised portion 46 may be separated from the anvil roll 45.
As shown in FIG. 12, a supply roller 56 is arranged in a state parallel to the axis of the anvil roll 45, and an endless belt 57 is wound around the supply roller 56 and the anvil roll 45. The endless belt 57 is made of resin and is used as a raised portion. Then, the supply roller 56 is rotated in the same direction as the anvil roll 45 by a driving device (not shown), and the endless belt 57 is rotated in synchronization with the anvil roll 45. Then, the exposed portion 23 is raised by the endless belt 57.

○ 嵩上げ部は、アンビルロール４５の軸方向両端を大径化して設けてもよい。
○ 嵩上げ部４６の厚みは、切刃４０がアンビルロール４５の周面に最接近したときのクリアランスより大きければ、適宜変更してもよく、例えば、嵩上げ部４６の厚みは、第２の塗工部２２ｂの厚みより薄くてもよい。 O The raising part may be provided by increasing the diameter of both ends of the anvil roll 45 in the axial direction.
The thickness of the raised portion 46 may be appropriately changed as long as the cutting edge 40 is larger than the clearance when the cutting edge 40 is closest to the peripheral surface of the anvil roll 45. For example, the thickness of the raised portion 46 is the second coating. It may be thinner than the thickness of the portion 22b.

○ 図１３に示すように、負極の電極材料２０から負極電極１６を切断する際、第１の縁１６ａから突出した形状の非切断部２３ｂを形成し、負極電極１６の第１の縁１６ａと露出部２３とを非切断部２３ｂで繋ぐようにしてもよい。   As shown in FIG. 13, when the negative electrode 16 is cut from the negative electrode material 20, an uncut portion 23b having a shape protruding from the first edge 16a is formed, and the first edge 16a of the negative electrode 16 You may make it connect the exposed part 23 with the non-cut | disconnecting part 23b.

○ 実施形態では、電極材料２０において、隙間Ｓと対応した位置に切れ込み２３ａを形成しつつ、非切断部２３ｂを形成したが、これに限らない。露出部２３を押す第１刃部４１を隙間Ｓに逃がしたとき、露出部２３に切れ込み２３ａは形成せず、切られていない露出部２３そのもので非切断部２３ｂを形成してもよい。   In the embodiment, in the electrode material 20, the non-cut portion 23 b is formed while forming the cut 23 a at a position corresponding to the gap S, but this is not a limitation. When the 1st blade part 41 which pushes the exposed part 23 is escaped to the clearance gap S, the notch 23a may not be formed in the exposed part 23, but the uncut part 23b may be formed with the exposed part 23 itself which is not cut.

○ 分離ロール５１においての各電極１３，１６の搬送方向と、端材５４の搬送方向は相互に異なっていれば、端材５４の搬送方向は実施形態と異なっていてもよい。
○ 切れ込み２３ａは、第１の塗工部２２ａは全切断するが、帯状集電箔２１は全切断しない状態で形成し、非切断部２３ｂを、帯状集電箔２１と第２の塗工部２２ｂで形成してもよい。 If the conveyance direction of each electrode 13 and 16 in the separation roll 51 and the conveyance direction of the end material 54 differ from each other, the conveyance direction of the end material 54 may differ from the embodiment.
The cut 23a is formed by cutting the first coating portion 22a completely, but the strip-shaped current collector foil 21 is not completely cut, and the non-cut portion 23b is formed by the strip-shaped current collector foil 21 and the second coated portion. 22b may be formed.

○ 分離ロール５１とは異なる方式で、非切断部２３ｂを破断してもよい。例えば、超音波により非切断部２３ｂを破断する方式が採用されてもよい。
○ ロータリーダイカッタ３４では、電極材料２０の幅方向Ｄ２に１枚の正極電極１３又は負極電極１６を切断するようにしたが、これに限らない。電極材料２０の帯状集電箔２１及び各塗工部２２ａ，２２ｂを幅方向Ｄ２に拡大する。このとき、幅方向Ｄ２に隣り合う塗工部同士の間に、電極材料２０の長手方向に沿う露出部を形成する。そして、隣り合う塗工部同士の間の露出部に隙間Ｓを対応させ、隙間Ｓを利用して非切断部２３ｂを形成するようにしてもよい。この場合、正極電極１３又は負極電極１６が幅方向Ｄ２に２枚以上切り出せるように、切刃４０を幅方向Ｄ２に２つ以上並べた形状とする。 O The non-cut portion 23b may be broken by a method different from that of the separation roll 51. For example, a method of breaking the non-cut portion 23b with ultrasonic waves may be employed.
In the rotary die cutter 34, one positive electrode 13 or negative electrode 16 is cut in the width direction D2 of the electrode material 20. However, the present invention is not limited to this. The strip-shaped current collector foil 21 and the coating portions 22a and 22b of the electrode material 20 are expanded in the width direction D2. At this time, an exposed portion along the longitudinal direction of the electrode material 20 is formed between the coating portions adjacent in the width direction D2. And the clearance gap S may be matched with the exposed part between adjacent coating parts, and you may make it form the non-cut | disconnecting part 23b using the clearance gap S. FIG. In this case, two or more cutting edges 40 are arranged in the width direction D2 so that two or more positive electrodes 13 or negative electrodes 16 can be cut in the width direction D2.

○ 電極材料２０は、帯状集電箔２１の片面だけに塗工部を備える構成であってもよい。この場合、塗工部がアンビルロール４５の周面に支持される状態で電極材料２０をロータリーダイカッタ３４に通過させる。また、この場合、正極電極１３は正極集電箔１４の片面に正極活物質層１５を備え、負極電極１６は、負極集電箔１７の片面に負極活物質層１８を備える構成となる。   The electrode material 20 may be configured to have a coating portion only on one side of the strip-shaped current collector foil 21. In this case, the electrode material 20 is passed through the rotary die cutter 34 in a state where the coating portion is supported by the peripheral surface of the anvil roll 45. In this case, the positive electrode 13 includes a positive electrode active material layer 15 on one surface of the positive electrode current collector foil 14, and the negative electrode 16 includes a negative electrode active material layer 18 on one surface of the negative electrode current collector foil 17.

○ 例えばキャパシタなど、二次電池以外の蓄電装置にも適用できる。
次に、上記実施形態及び別例から把握できる技術的思想について以下に追記する。
（１）前記嵩上げ部は、前記アンビルロールの周面に貼り付けられた樹脂シートであるロータリーダイカッタ。 ○ It can also be applied to power storage devices other than secondary batteries, such as capacitors.
Next, the technical idea that can be grasped from the above embodiment and other examples will be described below.
(1) The above-mentioned raising part is a rotary die cutter which is a resin sheet affixed on the peripheral surface of the anvil roll.

Ｓ…隙間、１３…電極としての正極電極、１６…電極としての負極電極、２０…電極材料、２１…帯状集電箔、２２ａ…第１の塗工部、２２ｂ…第２の塗工部、２３…露出部、２３ａ…切れ込み、２３ｂ…非切断部、３４…ロータリーダイカッタ、３５…ダイロール、４０…切刃、４５…アンビルロール、４６…嵩上げ部。   S ... Gap, 13 ... Positive electrode as electrode, 16 ... Negative electrode as electrode, 20 ... Electrode material, 21 ... Strip current collector foil, 22a ... First coating part, 22b ... Second coating part, 23 ... Exposed part, 23a ... Notch, 23b ... Uncut part, 34 ... Rotary die cutter, 35 ... Die roll, 40 ... Cutting blade, 45 ... Anvil roll, 46 ... Raised part.

Claims (5)

帯状集電箔の表面に形成された塗工部と、前記塗工部に隣接し、前記帯状集電箔の長手方向に沿って存在し前記帯状集電箔の露出した露出部と、を備える電極材料を、個片の電極の形状に切断する切断工程を備えた電極の製造方法であって、
前記切断工程は、切刃を周面に備えるダイロール、及び前記ダイロールの周面に対向して配置されたアンビルロールを含むロータリーダイカッタによって行われ、
前記電極材料を搬送しながら前記ダイロールと前記アンビルロールの間を通過させる際、
嵩上げ部により前記露出部を前記アンビルロールの周面から嵩上げしつつ、前記切刃の形状に沿って前記電極材料の切断を行い、
前記塗工部と前記嵩上げ部との間に形成された隙間により、該隙間に対応した露出部に非切断部を形成することを特徴とする電極の製造方法。 A coated portion formed on the surface of the strip-shaped current collector foil; and an exposed portion adjacent to the coated portion and present along the longitudinal direction of the strip-shaped current collector foil and exposed of the strip-shaped current collector foil. An electrode manufacturing method comprising a cutting step of cutting an electrode material into the shape of an individual electrode,
The cutting step is performed by a rotary die cutter including a die roll having a cutting edge on a peripheral surface, and an anvil roll disposed to face the peripheral surface of the die roll.
When passing between the die roll and the anvil roll while conveying the electrode material,
While raising the exposed portion from the peripheral surface of the anvil roll by the raised portion, cutting the electrode material along the shape of the cutting blade,
A non-cut portion is formed in an exposed portion corresponding to the gap by a gap formed between the coating portion and the raised portion. 前記電極材料が切断される過程で、前記非切断部では、前記切刃が押し当てられて前記露出部に切れ込みが形成される請求項１に記載の電極の製造方法。   2. The method for manufacturing an electrode according to claim 1, wherein in the process of cutting the electrode material, the cutting edge is pressed against the uncut portion to form a cut in the exposed portion. 前記切れ込みは、前記電極材料の搬送方向に沿って延びる切刃の一部により前記露出部が切られて形成される請求項２に記載の電極の製造方法。   The method of manufacturing an electrode according to claim 2, wherein the cut is formed by cutting the exposed portion with a part of a cutting blade extending along a conveying direction of the electrode material. 前記非切断部を破断する工程を備え、該破断する工程では、前記電極材料のうち前記電極として切り出される部分を、前記電極材料の搬送方向である第１方向へ案内する一方で、前記電極として切り出される部分とは異なる部分を、前記第１方向とは異なる方向へ案内する請求項１〜請求項３のうちいずれか一項に記載の電極の製造方法。   A step of breaking the non-cut portion, and in the step of breaking, the portion of the electrode material cut out as the electrode is guided in a first direction which is a transport direction of the electrode material, The method for manufacturing an electrode according to any one of claims 1 to 3, wherein a portion different from the cut-out portion is guided in a direction different from the first direction. 帯状集電箔の表面に形成された塗工部と、前記塗工部に隣接し、前記帯状集電箔の長手方向に沿って存在し前記帯状集電箔の露出した露出部と、を備える電極材料を、個片の電極の形状に切断するロータリーダイカッタであって、
切刃を周面に備えるダイロール、及び前記ダイロールの周面に対向して配置されたアンビルロールを含み、
前記ダイロールと前記アンビルロールの間を通過する前記電極材料のうち前記露出部を前記アンビルロールの周面から嵩上げする嵩上げ部を有するとともに、
前記塗工部と前記嵩上げ部との間に存在する隙間を有し、
前記隙間に対応して前記切刃の一部が配置されていることを特徴とするロータリーダイカッタ。 A coated portion formed on the surface of the strip-shaped current collector foil; and an exposed portion adjacent to the coated portion and present along the longitudinal direction of the strip-shaped current collector foil and exposed of the strip-shaped current collector foil. A rotary die cutter that cuts an electrode material into the shape of an individual electrode,
Including a die roll having a cutting edge on the peripheral surface, and an anvil roll disposed to face the peripheral surface of the die roll,
Of the electrode material passing between the die roll and the anvil roll, and having a raised portion that raises the exposed portion from the peripheral surface of the anvil roll,
Having a gap existing between the coating part and the raised part,
A rotary die cutter, wherein a part of the cutting blade is disposed corresponding to the gap.
JP2016081144A 2016-04-14 2016-04-14 Electrode manufacturing method and rotary die cutter Expired - Fee Related JP6736953B2 (en)

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