JP2018073658A - Electrode manufacturing apparatus - Google Patents
Electrode manufacturing apparatus Download PDFInfo
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- JP2018073658A JP2018073658A JP2016213034A JP2016213034A JP2018073658A JP 2018073658 A JP2018073658 A JP 2018073658A JP 2016213034 A JP2016213034 A JP 2016213034A JP 2016213034 A JP2016213034 A JP 2016213034A JP 2018073658 A JP2018073658 A JP 2018073658A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
- B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
- B26D1/25—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member
- B26D1/34—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut
- B26D1/40—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and coacting with a rotary member
- B26D1/405—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and coacting with a rotary member for thin material, e.g. for sheets, strips or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/20—Cutting beds
- B26D7/204—Anvil rollers
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Cell Electrode Carriers And Collectors (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
Description
本発明は、電極製造装置に関する。 The present invention relates to an electrode manufacturing apparatus.
蓄電装置の一種として、リチウムイオン二次電池が知られている。リチウムイオン二次電池は、正負の電極を備える。各極性の電極は、それぞれ金属箔を備える。金属箔は、例えば、矩形シート状の本体と、本体の一辺から突出した形状のタブとを備える。電極は、本体の少なくとも片面に活物質層を備える。電極の製造は、例えば、長尺の帯状金属箔の両面に活物質合剤の塗工部を有する電極材料を形成し、その電極材料を電極の形状に合わせて切断することで行われる。このような電極の製造方法は、例えば、特許文献１に記載されている。 A lithium ion secondary battery is known as a kind of power storage device. The lithium ion secondary battery includes positive and negative electrodes. Each polarity electrode includes a metal foil. The metal foil includes, for example, a rectangular sheet-shaped main body and a tab having a shape protruding from one side of the main body. The electrode includes an active material layer on at least one side of the main body. The production of the electrode is performed, for example, by forming an electrode material having a coated portion of the active material mixture on both sides of a long strip-shaped metal foil and cutting the electrode material according to the shape of the electrode. A method for manufacturing such an electrode is described in Patent Document 1, for example.
特許文献１に記載された電極材料は、長尺の帯状金属箔と、帯状金属箔の長手方向に延びる活物質合剤の塗工部と、帯状金属箔の短手方向の両縁に沿い、活物質合剤が塗工されていない未塗工部と、を備える。そして、帯状金属箔の短手方向の中心線で電極材料を二分して、中心線を挟んだ両側を電極の形状に合わせて切断して電極を製造している。電極のタブは、未塗工部をタブの形状に切断することで得られる。 The electrode material described in Patent Document 1 is a long strip-shaped metal foil, a coating portion of an active material mixture extending in the longitudinal direction of the strip-shaped metal foil, and both edges in the short direction of the strip-shaped metal foil, An uncoated portion on which the active material mixture is not coated. Then, the electrode material is divided into two by the center line in the short direction of the strip-shaped metal foil, and both sides sandwiching the center line are cut according to the shape of the electrode to manufacture the electrode. The electrode tab is obtained by cutting an uncoated portion into a tab shape.
ところで、電極材料の切断をロータリーダイカッタによって行う場合がある。ロータリーダイカッタを用いた電極材料の切断は、張力を働かせた状態で搬送される電極材料をロータリーダイとアンビルロールで挟み込むことで行われる。張力を働かせた状態での電極材料の搬送は、供給部から送り出された電極材料を、巻取装置で巻き取ることで行われるが、巻取装置で巻き取られる電極材料は、電極が切り出された後の端材である。即ち、未塗工部のうち電極として利用されない部分を巻き取ることで、電極材料の搬送と、電極材料の張力の維持とを可能にしている。 By the way, the electrode material may be cut by a rotary die cutter. The cutting of the electrode material using the rotary die cutter is performed by sandwiching the electrode material conveyed in a state where the tension is applied between the rotary die and the anvil roll. The electrode material in a state where tension is applied is transported by winding the electrode material sent from the supply unit with a winding device, but the electrode material is wound up by the winding device. It is the end material after. That is, by winding a portion that is not used as an electrode in the uncoated portion, it is possible to transport the electrode material and maintain the tension of the electrode material.
ところで、端材の巻き取りを可能にするには、例えば、特許文献１に記載のように帯状金属箔の短手方向両端に至るまで未塗工部が切断されないようにする必要がある。一方で、歩留まりを高めるためには、帯状金属箔の短手方向の両縁まで利用して電極を製造することが好ましい。しかし、帯状金属箔の短手方向の両縁に至るまで電極材料を切断してしまうと、電極材料が搬送方向の途中で分断されてしまうため端材を巻取装置で巻き取ることができず、電極材料の張力を維持することができずロータリーダイカッタによる電極の切り出しができない。 By the way, in order to enable winding of the end material, for example, as described in Patent Document 1, it is necessary to prevent the uncoated portion from being cut until both ends of the strip-shaped metal foil in the short direction. On the other hand, in order to increase the yield, it is preferable to manufacture the electrode using both edges of the strip-shaped metal foil in the short direction. However, if the electrode material is cut until it reaches both edges in the short direction of the strip-shaped metal foil, the electrode material is divided in the middle of the transport direction, so the end material cannot be wound by the winding device. The tension of the electrode material cannot be maintained, and the electrode cannot be cut out by the rotary die cutter.
本発明の目的は、帯状金属箔の短手方向の両縁に至るまで電極材料を切断して電極を切り出すことができる電極製造装置を提供することにある。 The objective of this invention is providing the electrode manufacturing apparatus which can cut | disconnect an electrode material to the both edges of the transversal direction of a strip | belt-shaped metal foil, and can cut out an electrode.
上記課題を解決する電極製造装置は、前記未塗工部は、前記帯状金属箔の短手方向の両縁に沿うように設けられ、前記周方向刃部は、前記塗工部を切断する少なくとも１つの第１周方向刃部と、前記第１周方向刃部に対して前記軸線方向の両側に前記第１周方向刃部と間隔を空けて配置された複数の第２周方向刃部と、を備え、前記軸線方向刃部は、一端が前記第１周方向刃部に繋がり、他端が前記第２周方向刃部に繋がる複数の第１軸線方向刃部と、一端が前記第２周方向刃部に繋がり、前記電極材料を前記帯状金属箔の短手方向の縁に至るまで切断する複数の第２軸線方向刃部と、を備え、前記軸線方向の両端の前記第２周方向刃部の間の複数の前記第１軸線方向刃部は、全ての前記第１軸線方向刃部が前記軸線方向に一直線上に位置しないように少なくとも１つの前記第１軸線方向刃部が前記周方向にずれて位置している。 In the electrode manufacturing apparatus that solves the above problem, the uncoated portion is provided along both edges in the short direction of the strip-shaped metal foil, and the circumferential blade portion cuts the coated portion at least. One first circumferential blade, and a plurality of second circumferential blades spaced from the first circumferential blade on both sides in the axial direction with respect to the first circumferential blade. The axial blade portion includes a plurality of first axial blade portions whose one end is connected to the first circumferential blade portion and the other end is connected to the second circumferential blade portion, and one end is the second blade. A plurality of second axial blade portions that are connected to the circumferential blade portion and cut the electrode material until reaching the edge in the short direction of the strip-shaped metal foil, and the second circumferential direction at both ends in the axial direction. In the plurality of first axial blade portions between the blade portions, all of the first axial blade portions are positioned on a straight line in the axial direction. At least one of the first axial edge portion is located offset in the circumferential direction odd.
供給部から供給された電極材料は、アンビルロールとロータリーダイの刃に挟まれ、電極材料が刃で切断されることで、電極を得ることができる。刃は、電極材料に進入し、電極材料を切断するまでの間、アンビルロールと電極材料を挟むことで電極材料に力を加えている。この力により電極材料は挟持されている。 The electrode material supplied from the supply unit is sandwiched between the anvil roll and the blade of the rotary die, and the electrode material is cut with the blade, whereby an electrode can be obtained. The blade applies force to the electrode material by sandwiching the anvil roll and the electrode material until the blade enters the electrode material and cuts the electrode material. The electrode material is sandwiched by this force.
アンビルロールとロータリーダイは、アンビルロールと刃で電極材料を挟持した状態で回転することで電極材料を搬送する。全ての軸線方向刃部が、軸線方向に一直線上に位置している場合、電極材料の短手方向に並んで電極が同時に切り出されることになる。すると、周方向刃部からの力が電極材料に加わりにくくなる。 The anvil roll and the rotary die convey the electrode material by rotating in a state where the electrode material is sandwiched between the anvil roll and the blade. When all the axial blade portions are positioned on a straight line in the axial direction, the electrodes are cut out side by side in the short direction of the electrode material. Then, it becomes difficult for the force from the circumferential blade portion to be applied to the electrode material.
これに対して、軸線方向刃部のうち、少なくとも１つの軸線方向刃部を周方向にずれて位置させることで、全ての軸線方向刃部が、軸線方向に一直線上に位置しないようにすると、帯状金属箔の短手方向に並んで切り出される複数の電極のうち、少なくとも１つは他の電極とは異なるタイミングで切り出される。周方向刃部の力が電極材料に加わっている状態が維持され、電極材料に張力を働かせながら電極材料を搬送することができる。 On the other hand, among the axial blade portions, by positioning at least one axial blade portion shifted in the circumferential direction so that all the axial blade portions are not positioned on a straight line in the axial direction, Of the plurality of electrodes cut out side by side in the short direction of the strip-shaped metal foil, at least one is cut out at a timing different from the other electrodes. The state where the force of the circumferential blade portion is applied to the electrode material is maintained, and the electrode material can be transported while applying tension to the electrode material.
上記したように、刃によって電極材料を挟持する力で電極材料を搬送することで、帯状金属箔の短手方向の両縁に至るまで電極材料を切断しても電極材料を搬送することができる。したがって、帯状金属箔の短手方向の両縁に至るまで電極材料を切断して電極を切り出すことができる。 As described above, by transporting the electrode material with a force that sandwiches the electrode material with the blade, the electrode material can be transported even if the electrode material is cut to both edges in the short direction of the strip-shaped metal foil. . Therefore, the electrode can be cut by cutting the electrode material up to both edges in the short direction of the strip-shaped metal foil.
上記電極製造装置について、前記未塗工部は、前記帯状金属箔の短手方向の両縁に沿うように設けられ、前記周方向刃部は、前記塗工部を切断する少なくとも１つの第１周方向刃部と、前記第１周方向刃部と前記軸線方向に間隔を空けて配置された複数の第２周方向刃部と、を備え、前記軸線方向刃部は、一端が前記第１周方向刃部に繋がり、他端が前記第２周方向刃部に繋がる複数の第１軸線方向刃部と、一端が前記第２周方向刃部に繋がり、前記電極材料を前記帯状金属箔の短手方向の縁に至るまで切断する複数の第２軸線方向刃部と、を備え、前記軸線方向の両端の前記第２周方向刃部の間の複数の前記第１軸線方向刃部は、全ての前記第１軸線方向刃部が前記軸線方向に一直線上に位置しないように少なくとも１つの前記第１軸線方向刃部が前記周方向にずれて位置していてもよい。 About the said electrode manufacturing apparatus, the said uncoated part is provided so that both the edges of the transversal direction of the said strip | belt-shaped metal foil may be provided, and the said circumferential direction blade part cuts the said coated part at least 1st 1st 1st. A circumferential blade, and a plurality of second circumferential blades arranged at intervals in the axial direction, the axial blade having one end at the first end. A plurality of first axial blade portions that are connected to the circumferential blade portion, the other end is connected to the second circumferential blade portion, and one end is connected to the second circumferential blade portion, and the electrode material is made of the strip-shaped metal foil. A plurality of second axial blade portions that cut to the edge in the short direction, and the plurality of first axial blade portions between the second circumferential blade portions at both ends in the axial direction, At least one first axial direction so that all the first axial blade portions are not positioned in a straight line in the axial direction. Blade portion may be positioned offset in the circumferential direction.
少なくとも１つの第１軸線方向刃部が軸線方向に一直線上に位置しないようにすることで、帯状金属箔の短手方向に並んで切り出される複数の電極のうち、少なくとも１つは他の電極とは異なるタイミングで切り出される。このため、第２周方向刃部の力が電極材料に加わっている状態が維持され、電極材料に張力を働かせながら電極材料を搬送することができる。 By preventing the at least one first axial blade portion from being positioned in a straight line in the axial direction, at least one of the plurality of electrodes cut out side by side in the short direction of the strip-shaped metal foil is the other electrode. Are cut out at different times. For this reason, the state where the force of the second circumferential blade portion is applied to the electrode material is maintained, and the electrode material can be conveyed while applying tension to the electrode material.
上記電極製造装置について、前記第２周方向刃部は、前記塗工部を切断してもよい。
電極材料において塗工部が設けられた部位は、未塗工部に比べて厚い。このため、刃からの力を受けやすく電極材料を挟持しやすい。
About the said electrode manufacturing apparatus, the said 2nd circumferential direction blade part may cut | disconnect the said coating part.
The site | part in which the coating part was provided in electrode material is thick compared with an uncoated part. For this reason, it is easy to receive the force from a blade, and to hold an electrode material easily.
上記電極製造装置について、前記刃は、前記第１周方向刃部を１つ備え、前記第１周方向刃部における前記軸線方向の両側の複数の前記第１軸線方向刃部が前記一直線上に位置しないように前記周方向にずれて位置していてもよい。 About the said electrode manufacturing apparatus, the said blade is equipped with the said 1st circumferential direction blade part, and the said several 1st axial direction blade part of the both sides of the said axial direction in the said 1st circumferential direction blade part is on the said straight line. It may be displaced in the circumferential direction so as not to be positioned.
これによれば、帯状金属箔の短手方向に並んで２つの電極を電極材料から切り出すことができる。
上記電極材料製造装置について、前記未塗工部は、前記帯状金属箔の短手方向に間隔を空けて設けられた前記塗工部の間に設けられ、前記周方向刃部は、前記軸線方向に互いに対向する第１対向刃部及び第２対向刃部を備え、前記軸線方向刃部は、各対向刃部同士の間で延びる内側刃部と、各対向刃部から前記内側刃部の延びる方向とは反対方向に延び、前記電極材料を前記帯状金属箔の短手方向の縁に至るまで切断する外側刃部とを備え、全ての前記外側刃部が前記軸線方向に一直線上に位置しないように少なくとも１つの前記外側刃部が前記周方向にずれて位置している。
According to this, two electrodes can be cut out from the electrode material side by side in the short direction of the strip-shaped metal foil.
About the said electrode material manufacturing apparatus, the said uncoated part is provided between the said coating parts provided at intervals in the transversal direction of the said strip | belt-shaped metal foil, The said circumferential direction blade part is the said axial direction 1st counter blade part and 2nd counter blade part which mutually oppose to each other, the axial blade part extends between each of the counter blade parts, and the inner blade part extends from each counter blade part. An outer blade that extends in a direction opposite to the direction and cuts the electrode material to the edge in the short direction of the strip-shaped metal foil, and all the outer blades are not positioned in a straight line in the axial direction As described above, at least one of the outer blade portions is shifted in the circumferential direction.
少なくとも１つの外側刃部が軸線方向に一直線上に位置しないようにすることで、帯状金属箔の短手方向に並んで切り出される複数の電極のうち、少なくとも１つは他の電極とは異なるタイミングで切り出される。このため、内側刃部の力が電極材料に加わっている状態が維持され、電極材料に張力を働かせながら電極材料を搬送することができる。 By preventing the at least one outer blade portion from being positioned in a straight line in the axial direction, at least one of the plurality of electrodes cut out side by side in the short direction of the strip-shaped metal foil has a timing different from that of the other electrodes. Cut out at. For this reason, the state where the force of the inner blade portion is applied to the electrode material is maintained, and the electrode material can be conveyed while applying tension to the electrode material.
上記電極製造装置について、前記アンビルロールと前記ダイカットロールとの間で弾性変形する弾性部材を前記ダイカットロールの外周面に備えていてもよい。
これによれば、弾性部材により電極材料をアンビルロールに押し付け、電極材料の動きを抑制しながら、電極材料を切断することができる。また、この弾性部材とアンビルロールで電極材料を挟持することができるため、電極材料に張力を働かせながら電極材料を搬送することができる。
About the said electrode manufacturing apparatus, you may equip the outer peripheral surface of the said die cut roll with the elastic member elastically deformed between the said anvil roll and the said die cut roll.
According to this, the electrode material can be cut while pressing the electrode material against the anvil roll by the elastic member and suppressing the movement of the electrode material. Further, since the electrode material can be sandwiched between the elastic member and the anvil roll, the electrode material can be conveyed while applying tension to the electrode material.
本発明によれば、帯状金属箔の短手方向の両縁に至るまで電極材料を切断して電極を切り出すことができる。 According to the present invention, an electrode can be cut by cutting the electrode material up to both edges in the short direction of the strip-shaped metal foil.
（第１実施形態）
以下、電極製造装置の第１実施形態について説明する。
図１に示すように、リチウムイオン二次電池１０は、電極組立体２０と、図示しない電解液と、電極組立体２０及び電解液を収容しているケース１１と、電極組立体２０と電気を授受するための２つの端子１２と、を備える。
(First embodiment)
Hereinafter, a first embodiment of an electrode manufacturing apparatus will be described.
As shown in FIG. 1, the lithium ion secondary battery 10 includes an electrode assembly 20, an electrolyte solution (not shown), a case 11 that accommodates the electrode assembly 20 and the electrolyte solution, and the electrode assembly 20. And two terminals 12 for giving and receiving.
図２に示すように、電極組立体２０は、リチウムイオン二次電池用の電極としての複数の正極電極２１と、リチウムイオン二次電池用の電極としての複数の負極電極２２と、複数のセパレータ２６と、を備える。正極電極２１と負極電極２２とは、セパレータ２６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 20 includes a plurality of positive electrodes 21 as electrodes for a lithium ion secondary battery, a plurality of negative electrodes 22 as electrodes for a lithium ion secondary battery, and a plurality of separators. 26. The positive electrode 21 and the negative electrode 22 overlap each other in a state of being insulated from each other by the separator 26.
正極電極２１及び負極電極２２は、四角シート状の電極本体２４と、電極本体２４の第１辺２４ａから突出する形状のタブ２５とを備える。電極本体２４は、四角シート状の金属箔２３を備える。正極電極２１の金属箔２３は、例えばアルミニウム箔である。負極電極２２の金属箔２３は、例えば銅箔である。金属箔２３の厚みは、例えば、５〜３０μｍとすることができる。 The positive electrode 21 and the negative electrode 22 include a square sheet-like electrode body 24 and a tab 25 having a shape protruding from the first side 24 a of the electrode body 24. The electrode body 24 includes a square sheet-like metal foil 23. The metal foil 23 of the positive electrode 21 is, for example, an aluminum foil. The metal foil 23 of the negative electrode 22 is, for example, a copper foil. The thickness of the metal foil 23 can be 5-30 micrometers, for example.
タブ２５は、電極本体２４の金属箔２３から突出する。正極電極２１のタブ２５は、例えばアルミニウム箔であり、負極電極２２のタブ２５は、例えば銅箔である。正極電極２１及び負極電極２２の電極本体２４は、金属箔２３の両面の全体に亘って活物質層２７を備える。活物質層２７は、それぞれの極性用の活物質、バインダ、及び導電助剤などを含有している。活物質層２７の厚みは、例えば、５〜２００μｍとすることができる。 The tab 25 protrudes from the metal foil 23 of the electrode body 24. The tab 25 of the positive electrode 21 is, for example, an aluminum foil, and the tab 25 of the negative electrode 22 is, for example, a copper foil. The electrode main body 24 of the positive electrode 21 and the negative electrode 22 includes an active material layer 27 over the entire both surfaces of the metal foil 23. The active material layer 27 contains an active material for each polarity, a binder, a conductive aid, and the like. The thickness of the active material layer 27 can be, for example, 5 to 200 μm.
電極本体２４において、タブ２５の存在する第１辺２４ａの対辺となる長辺を第２辺２４ｂとする。また、電極本体２４において、第１辺２４ａと第２辺２４ｂを繋ぐ一対の辺（短辺）のうち、一方の短辺を第３辺２４ｃとし、他方の辺を第４辺２４ｄとする。 In the electrode body 24, the long side that is the opposite side of the first side 24a where the tab 25 exists is defined as a second side 24b. In the electrode body 24, one short side of the pair of sides (short sides) connecting the first side 24a and the second side 24b is the third side 24c, and the other side is the fourth side 24d.
次に、電極製造設備４０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４０は、帯状の電極材料３０を切断し、予め定めた形状の正極電極２１又は負極電極２２を切り出す装置である。以下、正極電極２１の製造について説明する。電極製造設備４０には、電極材料３０が供給される。
Next, the electrode manufacturing equipment 40 will be described.
As shown in FIGS. 3A and 4, the electrode manufacturing facility 40 is a device that cuts the strip-shaped electrode material 30 and cuts the positive electrode 21 or the negative electrode 22 having a predetermined shape. Hereinafter, the production of the positive electrode 21 will be described. An electrode material 30 is supplied to the electrode manufacturing facility 40.
図３（ｂ）及び図４に示すように、長尺帯状の電極材料３０は、長尺の帯状金属箔３１と、帯状金属箔３１の両面に、活物質合剤を塗布した塗工部３２を備える。帯状金属箔３１は、シート状の金属箔２３を形成し得る。塗工部３２は、それぞれ正極電極２１が電極材料３０から切り出された際に、活物質層２７となる部位である。各塗工部３２は、帯状金属箔３１の長手方向に、帯状に一定の幅で延びている。 As shown in FIG. 3 (b) and FIG. 4, the long strip-shaped electrode material 30 is composed of a long strip-shaped metal foil 31 and a coating portion 32 in which an active material mixture is applied to both surfaces of the strip-shaped metal foil 31. Is provided. The strip-shaped metal foil 31 can form a sheet-shaped metal foil 23. The coating part 32 is a part that becomes the active material layer 27 when the positive electrode 21 is cut out from the electrode material 30. Each coating part 32 extends in a band shape with a certain width in the longitudinal direction of the band-shaped metal foil 31.
また、電極材料３０は、短手方向の両縁Ｅ１，Ｅ２に沿って未塗工部３３を備える。未塗工部３３は、帯状金属箔３１の長手方向に一定幅で設けられている。未塗工部３３は、活物質合剤（塗工部３２）が存在しない部位であり、帯状金属箔３１が露出した部分である。 Further, the electrode material 30 includes an uncoated portion 33 along both edges E1 and E2 in the short direction. The uncoated portion 33 is provided with a constant width in the longitudinal direction of the strip-shaped metal foil 31. The uncoated portion 33 is a portion where no active material mixture (coated portion 32) is present, and is a portion where the strip-shaped metal foil 31 is exposed.
帯状金属箔３１の厚みは、例えば、５〜３０μｍとすることができる。塗工部３２の厚みは、例えば、５〜２００μｍとすることができる。したがって、電極材料３０において、塗工部３２が設けられた部分の厚みは、１５〜４３０μｍとすることができ、未塗工部３３の厚みは、５〜３０μｍとすることができる。 The thickness of the strip | belt-shaped metal foil 31 can be 5-30 micrometers, for example. The thickness of the coating part 32 can be 5-200 micrometers, for example. Therefore, in the electrode material 30, the thickness of the part provided with the coating part 32 can be 15-430 micrometers, and the thickness of the uncoated part 33 can be 5-30 micrometers.
続けて、電極製造設備４０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４０は、電極材料３０を供給する供給部４１を備える。供給部４１は、ロール状に捲回された電極材料３０を支持するホルダ４２を備える。ホルダ４２は、電極材料３０の搬送速度にあわせて、電極材料３０を送り出す。電極製造設備４０は、電極材料３０を搬送する円柱状の搬送ロール４３を、電極材料３０を挟んで一対備える。搬送ロール４３の軸心は、帯状金属箔３１の短手方向に延びている。搬送ロール４３は、軸心まわりで回転できるように支持されている。
Next, the electrode manufacturing facility 40 will be described in detail.
As shown in FIG. 3A and FIG. 4, the electrode manufacturing facility 40 includes a supply unit 41 that supplies the electrode material 30. The supply unit 41 includes a holder 42 that supports the electrode material 30 wound in a roll shape. The holder 42 sends out the electrode material 30 in accordance with the conveying speed of the electrode material 30. The electrode manufacturing equipment 40 includes a pair of cylindrical transport rollers 43 that transport the electrode material 30 with the electrode material 30 interposed therebetween. The axis of the transport roll 43 extends in the short direction of the strip-shaped metal foil 31. The transport roll 43 is supported so that it can rotate around the axis.
電極製造設備４０は、電極製造装置としてのダイカット装置４４を備える。ダイカット装置４４は、電極材料３０を、正極電極２１の外形に沿って切断することにより、予め定めた形状の正極電極２１を電極材料３０から切り出す装置である。また、電極製造設備４０は、ダイカット装置４４によって得られた正極電極２１を搬送する搬送部４５を備える。 The electrode manufacturing equipment 40 includes a die cutting device 44 as an electrode manufacturing device. The die-cutting device 44 is a device that cuts out the positive electrode 21 having a predetermined shape from the electrode material 30 by cutting the electrode material 30 along the outer shape of the positive electrode 21. The electrode manufacturing facility 40 includes a transport unit 45 that transports the positive electrode 21 obtained by the die cutting device 44.
ダイカット装置４４は、ロータリーダイ５０と、アンビルロール５１とを備える。ロータリーダイ５０の軸心、及び、アンビルロール５１の軸心は、帯状金属箔３１の短手方向に延び、かつ互いに平行である。 The die cutting device 44 includes a rotary die 50 and an anvil roll 51. The axis of the rotary die 50 and the axis of the anvil roll 51 extend in the short direction of the strip-shaped metal foil 31 and are parallel to each other.
ロータリーダイ５０及びアンビルロール５１は、軸心まわりで回転できるように支持されている。ダイカット装置４４は、図示しないモータなどの駆動装置を備える。この駆動装置によって、ロータリーダイ５０及びアンビルロール５１は回転する。 The rotary die 50 and the anvil roll 51 are supported so as to be rotatable around the axis. The die cutting device 44 includes a driving device such as a motor (not shown). By this drive device, the rotary die 50 and the anvil roll 51 rotate.
ロータリーダイ５０は、ダイカットロール５２と、ダイカットロール５２の径方向外側に突出する形状の刃６０とを備える。ダイカットロール５２は、マグネットロール５３と、マグネットロール５３の外周面の全周に亘って巻き付けられたプレート５４とを備える。プレート５４は、マグネットロール５３の外周面に貼り付けられ、マグネットロール５３と同心の円筒状となっている。これにより、プレート５４の厚み方向の一面がダイカットロール５２の外周面となる。刃６０は、プレート５４の厚み方向の面のうち、マグネットロール５３側の面とは反対側の面（外周面）に一体である。刃６０の刃高（ダイカットロール５２の外周面からの突出長）は、電極材料３０を打ち抜くことができる寸法に設定されている。ダイカットロール５２の軸線方向の寸法は、帯状金属箔３１の短手方向の寸法よりも長い。 The rotary die 50 includes a die cut roll 52 and a blade 60 having a shape protruding outward in the radial direction of the die cut roll 52. The die cut roll 52 includes a magnet roll 53 and a plate 54 wound around the entire outer circumference of the magnet roll 53. The plate 54 is affixed to the outer peripheral surface of the magnet roll 53 and has a cylindrical shape concentric with the magnet roll 53. Thereby, one surface in the thickness direction of the plate 54 becomes the outer peripheral surface of the die cut roll 52. The blade 60 is integrated with a surface (outer peripheral surface) opposite to the surface on the magnet roll 53 side in the thickness direction surface of the plate 54. The blade height of the blade 60 (projection length from the outer peripheral surface of the die cut roll 52) is set to a dimension that allows the electrode material 30 to be punched out. The dimension in the axial direction of the die cut roll 52 is longer than the dimension in the short direction of the strip-shaped metal foil 31.
ロータリーダイ５０とアンビルロール５１が供給部４１から送り出された電極材料３０を挟持した状態で回転するとともに、回転による刃６０の打ち抜きにより電極材料３０を切断して、正極電極２１を得る。本実施形態では、ダイカット装置４４では、電極材料３０を搬送方向には分断せず、電極材料３０に張力を与えながら搬送を行えるようにすることで、巻取装置を用いることなく電極材料３０から正極電極２１を得ることを可能にしている。以下、電極材料３０の切断を行う刃６０について詳細に説明を行う。なお、以下の説明においてダイカットロール５２の軸線方向を「軸線方向」、ダイカットロール５２の周方向を「周方向」として説明を行う。図５は、プレート５４の展開図を平面視した図であり、言い換えれば、ダイカットロール５２の外周面を直線状に引き延した図であるともいえる。 The rotary die 50 and the anvil roll 51 rotate while sandwiching the electrode material 30 delivered from the supply unit 41, and the electrode material 30 is cut by punching the blade 60 by rotation to obtain the positive electrode 21. In the present embodiment, the die-cutting device 44 does not divide the electrode material 30 in the conveyance direction, and can perform conveyance while applying tension to the electrode material 30, so that the electrode material 30 can be removed from the electrode material 30 without using a winding device. The positive electrode 21 can be obtained. Hereinafter, the blade 60 for cutting the electrode material 30 will be described in detail. In the following description, the axial direction of the die cut roll 52 is referred to as “axial direction”, and the circumferential direction of the die cut roll 52 is referred to as “circumferential direction”. FIG. 5 is a plan view of the developed view of the plate 54. In other words, it can be said that the outer peripheral surface of the die cut roll 52 is linearly extended.
図５に示すように、刃６０は、周方向に延びる周方向刃部６０Ａと、軸線方向に延びる軸線方向刃部６０Ｂとを備える。周方向刃部６０Ａは、第１周方向刃部６１を１つ備える。第１周方向刃部６１は、ダイカットロール５２の軸線方向の中央に位置しており、周方向の全体に亘って設けられている。 As shown in FIG. 5, the blade 60 includes a circumferential blade portion 60A extending in the circumferential direction and an axial blade portion 60B extending in the axial direction. The circumferential blade portion 60 </ b> A includes one first circumferential blade portion 61. The 1st circumferential direction blade part 61 is located in the center of the axial direction of the die-cut roll 52, and is provided over the whole circumferential direction.
軸線方向刃部６０Ｂは、第１軸線方向刃部６２を備える。第１軸線方向刃部６２の軸線方向の寸法は、電極本体２４の短辺である第３辺２４ｃ及び第４辺２４ｄと同一である。第１軸線方向刃部６２は、第１周方向刃部６１に一端が繋がり、第１周方向刃部６１から軸線方向の両側に延びている。以下の説明において、第１軸線方向刃部６２のうち、第１周方向刃部６１から軸線方向の一方に向けて延びている第１軸線方向刃部６２を、適宜、第１刃部６３と称し、第１軸線方向刃部６２のうち、第１周方向刃部６１から軸線方向の他方に向けて延びている第１軸線方向刃部６２を、適宜、第２刃部６４と称する。 The axial blade part 60 </ b> B includes a first axial blade part 62. The dimension in the axial direction of the first axial blade portion 62 is the same as the third side 24 c and the fourth side 24 d that are the short sides of the electrode body 24. One end of the first axial blade portion 62 is connected to the first circumferential blade portion 61 and extends from the first circumferential blade portion 61 to both sides in the axial direction. In the following description, among the first axial blade parts 62, the first axial blade part 62 extending from the first circumferential blade part 61 toward one side in the axial direction is appropriately referred to as a first blade part 63. The first axial blade portion 62 that extends from the first circumferential blade portion 61 toward the other axial direction among the first axial blade portions 62 is appropriately referred to as a second blade portion 64.
本実施形態の第１軸線方向刃部６２は、第１刃部６３と第２刃部６４を２つずつ備える。第１刃部６３同士は、周方向に対向している。第１刃部６３同士の周方向の間隔は、電極本体２４の長辺である第１辺２４ａ及び第２辺２４ｂの寸法と同一である。第２刃部６４同士は、周方向に対向している。第２刃部６４同士の周方向の間隔は、電極本体２４の長辺である第１辺２４ａ及び第２辺２４ｂの寸法と同一である。 The first axial blade portion 62 of this embodiment includes two first blade portions 63 and two second blade portions 64. The first blade parts 63 are opposed to each other in the circumferential direction. The interval between the first blade portions 63 in the circumferential direction is the same as the dimensions of the first side 24 a and the second side 24 b that are the long sides of the electrode body 24. The second blade parts 64 are opposed to each other in the circumferential direction. The interval in the circumferential direction between the second blade portions 64 is the same as the dimensions of the first side 24 a and the second side 24 b that are the long sides of the electrode body 24.
第１刃部６３と第２刃部６４とは、軸線方向の異なる位置に設けられている。第１刃部６３と第２刃部６４とは、周方向にずれて位置しており、軸線方向において一直線上に位置していない。第２刃部６４は、全ての第１軸線方向刃部６２が軸線方向において一直線上に位置しないように周方向にずれて位置しているといえる。 The first blade portion 63 and the second blade portion 64 are provided at different positions in the axial direction. The 1st blade part 63 and the 2nd blade part 64 are displaced in the circumferential direction, and are not located on the straight line in the axial direction. It can be said that the 2nd blade part 64 has shifted | deviated to the circumferential direction so that all the 1st axial direction blade parts 62 may not be located on a straight line in an axial direction.
周方向刃部６０Ａは、各第１軸線方向刃部６２の両端部のうち第１周方向刃部６１に繋がる端部とは反対側の端部（他端）に繋がる第２周方向刃部６５を備える。各第２周方向刃部６５は、周方向の途中位置で分断された分断部６６を２つ備える。分断部６６は、第２周方向刃部６５が設けられていない箇所である。分断部６６の周方向の寸法は、タブ２５の第１辺２４ａに沿う寸法と同一である。 60 A of circumferential blade parts are the 2nd circumferential blade part connected to the edge part (other end) on the opposite side to the edge part connected to the 1st circumferential blade part 61 among the both ends of each 1st axial direction blade part 62 65. Each second circumferential blade portion 65 includes two dividing portions 66 that are divided at a midway position in the circumferential direction. The dividing part 66 is a place where the second circumferential blade part 65 is not provided. The dimension in the circumferential direction of the dividing portion 66 is the same as the dimension along the first side 24 a of the tab 25.
軸線方向刃部６０Ｂは、第２周方向刃部６５からプレート５４の長縁（軸線方向の縁）に向けて軸線方向に延びる第２軸線方向刃部６７を備える。第２軸線方向刃部６７の一端は第２周方向刃部６５に繋がり、第２軸線方向刃部６７の他端はプレート５４の長縁に繋がっている。第２軸線方向刃部６７は、第２周方向刃部６５のうち、分断部６６を挟んだ位置から延びている。分断部６６を挟んで位置する第２軸線方向刃部６７同士の周方向の間隔は、タブ２５の第１辺２４ａに沿う寸法と同一である。第２軸線方向刃部６７の軸線方向の寸法は、タブ２５の第１辺２４ａからの突出寸法以上である。 The axial blade portion 60B includes a second axial blade portion 67 extending in the axial direction from the second circumferential blade portion 65 toward the long edge (edge in the axial direction) of the plate 54. One end of the second axial blade portion 67 is connected to the second circumferential blade portion 65, and the other end of the second axial blade portion 67 is connected to the long edge of the plate 54. The second axial blade part 67 extends from a position of the second circumferential blade part 65 with the dividing part 66 interposed therebetween. The interval in the circumferential direction between the second axial blade portions 67 located with the dividing portion 66 interposed therebetween is the same as the dimension along the first side 24 a of the tab 25. The dimension in the axial direction of the second axial blade portion 67 is equal to or larger than the projecting dimension of the tab 25 from the first side 24a.
図６に示すように、ダイカット装置４４は、アンビルロール５１とダイカットロール５２の間で弾性変形する弾性部材７１をダイカットロール５２の外周面に備える。そして、弾性部材７１によって電極材料３０をアンビルロール５１に押し付け、ダイカットロール５２とアンビルロール５１との間での電極材料３０の動きを抑制しながら、電極材料３０を切断する。弾性部材７１は、ダイカットロール５２の外周面のうち、刃６０が突出する部分の周囲を除く箇所に設けられている。なお、弾性部材７１としては、例えば、スポンジやゴムなどが用いられる。 As shown in FIG. 6, the die-cutting device 44 includes an elastic member 71 that elastically deforms between the anvil roll 51 and the die-cut roll 52 on the outer peripheral surface of the die-cut roll 52. Then, the electrode material 30 is pressed against the anvil roll 51 by the elastic member 71, and the electrode material 30 is cut while suppressing the movement of the electrode material 30 between the die cut roll 52 and the anvil roll 51. The elastic member 71 is provided in a portion of the outer peripheral surface of the die cut roll 52 excluding the periphery of the portion where the blade 60 protrudes. As the elastic member 71, for example, sponge or rubber is used.
次に、本実施形態のダイカット装置４４の作用について説明する。
図７（ａ）に示すように、本実施形態のダイカット装置４４は、電極材料３０を短手方向の中央で二分して、短手方向の両側から正極電極２１を切り出す。また、本実施形態のダイカット装置４４は、ダイカットロール５２が１周する間に、電極材料３０の長手方向に並んで２つの正極電極２１を切り出す。したがって、ダイカットロール５２が１周する間には、計４つの正極電極２１が切り出される。
Next, the operation of the die cutting device 44 of this embodiment will be described.
As shown to Fig.7 (a), the die-cut apparatus 44 of this embodiment bisects the electrode material 30 in the center of a transversal direction, and cuts out the positive electrode 21 from both sides of a transversal direction. In addition, the die cutting device 44 of the present embodiment cuts out the two positive electrodes 21 side by side in the longitudinal direction of the electrode material 30 while the die cut roll 52 makes one round. Therefore, a total of four positive electrodes 21 are cut out while the die-cut roll 52 makes one round.
第１周方向刃部６１は、塗工部３２が設けられた部位を帯状金属箔３１の長手方向に連続的に切断することで、正極電極２１の第２辺２４ｂを形成する。第１軸線方向刃部６２は、塗工部３２が設けられた部位を切断することで、正極電極２１の第３辺２４ｃ及び第４辺２４ｄを形成する。第２周方向刃部６５は、塗工部３２が設けられた部位を切断することで、正極電極２１の第１辺２４ａを形成する。縁切断刃部としての第２軸線方向刃部６７は、未塗工部３３を両縁Ｅ１，Ｅ２に至るまで切断することで、タブ２５を形成する。 The first circumferential blade portion 61 forms the second side 24 b of the positive electrode 21 by continuously cutting the portion where the coating portion 32 is provided in the longitudinal direction of the strip-shaped metal foil 31. The first axial direction blade portion 62 forms the third side 24 c and the fourth side 24 d of the positive electrode 21 by cutting the portion where the coating portion 32 is provided. The 2nd circumferential direction blade part 65 forms the 1st edge | side 24a of the positive electrode 21 by cut | disconnecting the site | part in which the coating part 32 was provided. The 2nd axial direction blade part 67 as an edge cutting blade part forms the tab 25 by cut | disconnecting the uncoated part 33 until it reaches both edges E1, E2.
ここで、電極材料３０に張力を働かせながら、電極材料３０を搬送するためには、アンビルロール５１及びロータリーダイ５０からの力が電極材料３０に加わり、電極材料３０が挟持された状態に維持されている必要がある。即ち、供給部４１とダイカット装置４４で、電極材料３０を支持する必要がある。 Here, in order to convey the electrode material 30 while applying tension to the electrode material 30, the force from the anvil roll 51 and the rotary die 50 is applied to the electrode material 30, and the electrode material 30 is maintained in a sandwiched state. Need to be. In other words, the electrode material 30 needs to be supported by the supply unit 41 and the die cutting device 44.
ロータリーダイ５０のうち電極材料３０に力を加えているのは刃６０である。刃６０は、電極材料３０に進入し、電極材料３０を切断するまでの間、アンビルロール５１と電極材料３０を挟むことで電極材料３０に力を加えている。この力により電極材料３０は挟持されている。 Of the rotary die 50, the blade 60 applies a force to the electrode material 30. The blade 60 enters the electrode material 30 and applies force to the electrode material 30 by sandwiching the anvil roll 51 and the electrode material 30 until the electrode material 30 is cut. The electrode material 30 is clamped by this force.
ここで各軸線方向刃部６２，６７は、ロータリーダイ５０が１周する間に僅かしか電極材料３０に進入しないのに対し、各周方向刃部６１，６５は、ロータリーダイ５０が１周する間中、連続的に電極材料３０に進入する。このため、刃６０のうち、電極材料３０を挟持するのに起因しているのは主として各周方向刃部６１，６５といえる。図７（ａ）及び図７（ｂ）では、各周方向刃部６１，６５のうちアンビルロール５１の外周面と電極材料３０を挟んでいる箇所、即ち、各周方向刃部６１，６５からの力が最も強く加わっている箇所を点Ｐ１〜Ｐ３で示している。また、図７（ａ）及び図７（ｂ）では、刃６０で切断されることで電極材料３０から分離された部分をドットで示している。 Here, each of the axial direction blade portions 62 and 67 slightly enters the electrode material 30 while the rotary die 50 makes one turn, whereas each of the circumferential direction blade portions 61 and 65 makes one turn of the rotary die 50. The electrode material 30 is continuously entered throughout. For this reason, it can be said that it is mainly each circumferential direction blade part 61 and 65 that originates in clamping the electrode material 30 among the blades 60. 7 (a) and 7 (b), each circumferential blade portion 61, 65 has a portion sandwiching the outer peripheral surface of the anvil roll 51 and the electrode material 30, that is, from each circumferential blade portion 61, 65. The locations where the force is most strongly applied are indicated by points P1 to P3. Further, in FIGS. 7A and 7B, a portion separated from the electrode material 30 by being cut by the blade 60 is indicated by dots.
まず、比較例として、第１刃部６３と第２刃部６４とが周方向の同一位置に設けられ、軸線方向において一直線上に並んでいる場合のダイカット装置について説明する。
図７（ｂ）に示すように、第１刃部６３と第２刃部６４とが軸線方向において一直線上に並んでいる場合、電極材料３０の短手方向に並んで２つの正極電極２１が同時に切り出される。すると、点Ｐ１〜Ｐ３は電極材料３０と、電極材料３０から分離された部分である正極電極２１との境界に位置することになる。この場合、各周方向刃部６１，６５からの力が電極材料３０に加わらなくなる、あるいは、電極材料３０を挟持できるだけの力を維持できず、電極材料３０に張力を働かせることができなくなるおそれがある。すると、電極材料３０は、アンビルロール５１とダイカットロール５２との間から抜けてしまい、電極材料３０の搬送、ひいては、正極電極２１の製造を行うことができない。
First, as a comparative example, a description will be given of a die cutting apparatus in which the first blade portion 63 and the second blade portion 64 are provided at the same position in the circumferential direction and are aligned in a straight line in the axial direction.
As shown in FIG. 7B, when the first blade portion 63 and the second blade portion 64 are aligned in a straight line in the axial direction, the two positive electrodes 21 are aligned in the short direction of the electrode material 30. Cut out at the same time. Then, the points P <b> 1 to P <b> 3 are located at the boundary between the electrode material 30 and the positive electrode 21 that is a portion separated from the electrode material 30. In this case, the force from each of the circumferential blade portions 61 and 65 may not be applied to the electrode material 30, or the force sufficient to hold the electrode material 30 may not be maintained, and it may not be possible to apply tension to the electrode material 30. is there. Then, the electrode material 30 comes out between the anvil roll 51 and the die-cut roll 52, and the electrode material 30 cannot be transported and thus the positive electrode 21 cannot be manufactured.
図７（ａ）に示すように、本実施形態のダイカット装置４４では、第１刃部６３によって電極材料３０が切断されるタイミングと、第２刃部６４によって電極材料３０が切断されるタイミングが異なる。このため、第１刃部６３によって電極材料３０から正極電極２１が切り出されたタイミングでは、点Ｐ１、点Ｐ２は電極材料３０と、正極電極２１との境界に位置している。これに対し、第２刃部６４によっては正極電極２１が切り出されていないため、第２周方向刃部６５からの力（点Ｐ３）は電極材料３０に加わっている。 As shown in FIG. 7A, in the die-cutting device 44 of this embodiment, the timing at which the electrode material 30 is cut by the first blade portion 63 and the timing at which the electrode material 30 is cut by the second blade portion 64 are present. Different. For this reason, at the timing when the positive electrode 21 is cut out from the electrode material 30 by the first blade portion 63, the points P <b> 1 and P <b> 2 are located at the boundary between the electrode material 30 and the positive electrode 21. On the other hand, since the positive electrode 21 is not cut out by the second blade portion 64, the force (point P3) from the second circumferential blade portion 65 is applied to the electrode material 30.
即ち、電極材料３０の短手方向に並ぶ正極電極２１が切り出される周期（位相）をずらすことで、電極材料３０の短手方向に並ぶ正極電極２１が同時に切り出されないようにしている。すると、電極材料３０の短手方向に並ぶ正極電極２１のうち、いずれかは常に切断途中となる。切断途中の正極電極２１は、電極材料３０から分離されていないため、少なくとも１つの第２周方向刃部６５からの力を電極材料３０で受けることができる。図７（ａ）では、点Ｐ３で示すように、第２周方向刃部６５からの力が電極材料３０に加わっている。 That is, by shifting the cycle (phase) in which the positive electrodes 21 aligned in the short direction of the electrode material 30 are shifted, the positive electrodes 21 aligned in the short direction of the electrode material 30 are prevented from being simultaneously cut. Then, any one of the positive electrodes 21 arranged in the short direction of the electrode material 30 is always in the middle of cutting. Since the positive electrode 21 in the middle of cutting is not separated from the electrode material 30, the electrode material 30 can receive a force from at least one second circumferential blade portion 65. In FIG. 7A, the force from the second circumferential blade portion 65 is applied to the electrode material 30 as indicated by a point P3.
また、ダイカットロール５２の外周面に弾性部材７１を設けていることで、アンビルロール５１の外周面と弾性部材７１によっても電極材料３０は挟持されている。この場合であっても、電極材料３０の短手方向に並んで２つの正極電極２１が同時に切り出されると、電極材料３０に加わる力が、電極材料３０から分離された正極電極２１に分散してしまう。これに対して、電極材料３０の短手方向に並ぶ正極電極２１が同時に切り出されないようにすることで、電極材料３０に加わる力が大きく、電極材料３０を挟持しやすい。 In addition, since the elastic member 71 is provided on the outer peripheral surface of the die cut roll 52, the electrode material 30 is also sandwiched between the outer peripheral surface of the anvil roll 51 and the elastic member 71. Even in this case, when the two positive electrodes 21 are cut out simultaneously in the short direction of the electrode material 30, the force applied to the electrode material 30 is dispersed to the positive electrode 21 separated from the electrode material 30. End up. On the other hand, by preventing the positive electrodes 21 arranged in the short direction of the electrode material 30 from being cut out at the same time, the force applied to the electrode material 30 is large and the electrode material 30 is easily held.
したがって、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）軸線方向の両端の第２周方向刃部６５の間に位置している第１刃部６３と第２刃部６４とは、周方向にずれて位置している。このため、電極材料３０を切断する際に、少なくとも１つの第２周方向刃部６５からの力が電極材料３０に加わる状態が維持される。したがって、電極材料３０をロータリーダイ５０とアンビルロール５１で挟持して、電極材料３０に張力を働かせつつ、電極材料３０の搬送をダイカット装置４４で行うことができる。電極材料３０に張力を働かせつつ電極材料３０を搬送するために未塗工部３３の一部を残すように電極材料３０を切断する必要がなく、未塗工部３３の両縁Ｅ１，Ｅ２に至るまで電極材料３０を切断して、正極電極２１を得ることができる。したがって、正極電極２１の歩留まりが向上する。更に、巻取装置が不要となるため、電極製造設備４０の低コスト化が図られる。
Therefore, according to the above embodiment, the following effects can be obtained.
(1) The 1st blade part 63 and the 2nd blade part 64 which are located between the 2nd circumferential blade parts 65 of the both ends of an axial direction are shifted | deviated and located in the circumferential direction. For this reason, when the electrode material 30 is cut, a state in which the force from at least one second circumferential blade portion 65 is applied to the electrode material 30 is maintained. Accordingly, the electrode material 30 can be transported by the die cutting device 44 while the electrode material 30 is sandwiched between the rotary die 50 and the anvil roll 51 and tension is applied to the electrode material 30. It is not necessary to cut the electrode material 30 so as to leave a part of the uncoated portion 33 in order to convey the electrode material 30 while exerting tension on the electrode material 30, and the both edges E1 and E2 of the uncoated portion 33 are left. The positive electrode 21 can be obtained by cutting the electrode material 30 to the end. Therefore, the yield of the positive electrode 21 is improved. Furthermore, since no winding device is required, the cost of the electrode manufacturing facility 40 can be reduced.
（２）第２周方向刃部６５は、塗工部３２を切断している。塗工部３２は、未塗工部３３に比べて厚い。このため、各周方向刃部６１，６５からの力が電極材料３０に加わりやすく、ダイカット装置４４による電極材料３０の搬送を行いやすい。 (2) The second circumferential blade portion 65 cuts the coating portion 32. The coated part 32 is thicker than the uncoated part 33. For this reason, the force from each circumferential direction blade part 61 and 65 tends to be applied to the electrode material 30, and it is easy to carry the electrode material 30 by the die-cutting device 44.
（３）ダイカット装置４４は、ダイカットロール５２の外周面に弾性部材７１を備える。したがって、弾性部材７１とアンビルロール５１でも電極材料３０を挟持することができ、ダイカット装置４４による電極材料３０の搬送を行いやすい。 (3) The die cut device 44 includes an elastic member 71 on the outer peripheral surface of the die cut roll 52. Therefore, the electrode material 30 can be sandwiched between the elastic member 71 and the anvil roll 51, and the electrode material 30 can be easily conveyed by the die cutting device 44.
（第２実施形態）
次に、電極製造装置の第２実施形態について説明する。以下の説明において、第１実施形態と同様の構成については同一の符合を付すことで説明を省略する。
(Second Embodiment)
Next, a second embodiment of the electrode manufacturing apparatus will be described. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
図８（ａ）に示すように、第２実施形態では、帯状金属箔３１の短手方向の両縁Ｅ１，Ｅ２に沿って塗工部３２が設けられた電極材料３０から正極電極２１が切り出される。電極材料３０は、帯状金属箔３１の短手方向における一対の塗工部３２の間に、両塗工部３２の長手方向に延びる縁に沿う未塗工部３３を備える。第２実施形態と、第１実施形態では刃の形状が異なることを除き、ダイカット装置４４は同一の構成を備える。以下、第２実施形態の刃の形状について説明する。 As shown in FIG. 8A, in the second embodiment, the positive electrode 21 is cut out from the electrode material 30 provided with the coating portion 32 along both short-side edges E1, E2 of the strip-shaped metal foil 31. It is. The electrode material 30 includes an uncoated portion 33 along an edge extending in the longitudinal direction of both coated portions 32 between the pair of coated portions 32 in the short direction of the strip-shaped metal foil 31. The die cutting device 44 has the same configuration except that the shape of the blade is different between the second embodiment and the first embodiment. Hereinafter, the shape of the blade of the second embodiment will be described.
図８（ｂ）に示すように、刃９０は、周方向に延びる周方向刃部９０Ａと、軸線方向に延びる軸線方向刃部９０Ｂとを備える。周方向刃部９０Ａは、軸線方向に互いに対向する第１対向刃部９１及び第２対向刃部９２を備える。２つの対向刃部９１，９２は、ダイカットロール５２の軸線方向の中央を挟んで位置している。各対向刃部９１，９２は、周方向の途中位置で分断された分断部９３を２つ備える。分断部９３は、各対向刃部９１，９２が設けられていない箇所である。分断部９３の周方向の寸法は、タブ２５の第１辺２４ａに沿う寸法と同一である。各対向刃部９１，９２の分断部９３は、軸線方向に重なり合わないように配置されている。 As shown in FIG. 8B, the blade 90 includes a circumferential blade portion 90A extending in the circumferential direction and an axial blade portion 90B extending in the axial direction. The circumferential blade portion 90A includes a first opposed blade portion 91 and a second opposed blade portion 92 that face each other in the axial direction. The two opposing blade portions 91 and 92 are located across the center of the die cut roll 52 in the axial direction. Each of the opposing blade portions 91 and 92 includes two dividing portions 93 that are divided at a midway position in the circumferential direction. The dividing portion 93 is a location where the opposing blade portions 91 and 92 are not provided. The dimension of the dividing portion 93 in the circumferential direction is the same as the dimension along the first side 24 a of the tab 25. The dividing part 93 of each opposing blade part 91 and 92 is arrange | positioned so that it may not overlap in an axial direction.
刃９０の軸線方向刃部９０Ｂは、各対向刃部９１，９２の間で延び、各対向刃部９１，９２に繋がる複数の内側刃部９４を備える。各内側刃部９４は、分断部９３を挟んだ位置から延びている。分断部９３を挟んで位置する内側刃部９４同士の周方向の間隔は、タブ２５の第１辺２４ａに沿う寸法と同一である。内側刃部９４の軸線方向の寸法は、タブ２５の第１辺２４ａからの突出寸法と同一である。 The axial blade part 90 </ b> B of the blade 90 includes a plurality of inner blade parts 94 that extend between the opposing blade parts 91 and 92 and are connected to the opposing blade parts 91 and 92. Each inner blade portion 94 extends from a position sandwiching the dividing portion 93. The interval in the circumferential direction between the inner blade portions 94 positioned with the dividing portion 93 interposed therebetween is the same as the dimension along the first side 24 a of the tab 25. The dimension of the inner blade portion 94 in the axial direction is the same as the protruding dimension of the tab 25 from the first side 24a.
刃９０の軸線方向刃部９０Ｂは、各対向刃部９１，９２から内側刃部９４の延びる方向とは反対方向に延びる外側刃部９５を備える。外側刃部９５の軸線方向の寸法は、電極本体２４の短辺である第３辺２４ｃ及び第４辺２４ｄの寸法以上である。外側刃部９５は、対向刃部９１，９２に一端が繋がり、プレート５４の長縁（軸線方向の縁）に他端が繋がる。以下の説明において、外側刃部９５のうち、第１対向刃部９１に繋がる外側刃部９５を、適宜、第１刃部９６と称し、外側刃部９５のうち、第２対向刃部９２に繋がる外側刃部９５を、適宜、第２刃部９７と称する。 The axial blade portion 90B of the blade 90 includes an outer blade portion 95 that extends from the opposing blade portions 91 and 92 in a direction opposite to the direction in which the inner blade portion 94 extends. The dimension in the axial direction of the outer blade portion 95 is equal to or larger than the dimensions of the third side 24 c and the fourth side 24 d that are the short sides of the electrode body 24. One end of the outer blade portion 95 is connected to the opposed blade portions 91 and 92, and the other end is connected to the long edge (edge in the axial direction) of the plate 54. In the following description, the outer blade portion 95 connected to the first opposing blade portion 91 among the outer blade portions 95 is appropriately referred to as a first blade portion 96, and among the outer blade portions 95, the second opposing blade portion 92 is referred to as the second opposing blade portion 92. The connected outer blade part 95 is appropriately referred to as a second blade part 97.
本実施形態の外側刃部９５は、第１刃部９６と第２刃部９７を２つずつ備える。第１刃部９６同士は、周方向に対向している。第１刃部９６同士の周方向の間隔は、電極本体２４の長辺である第１辺２４ａ及び第２辺２４ｂの寸法と同一である。第２刃部９７同士は、周方向に対向している。第２刃部９７同士の周方向の間隔は、電極本体２４の長辺である第１辺２４ａ及び第２辺２４ｂの寸法と同一である。 The outer blade portion 95 of the present embodiment includes two first blade portions 96 and two second blade portions 97. The first blade parts 96 face each other in the circumferential direction. The interval between the first blade portions 96 in the circumferential direction is the same as the dimensions of the first side 24 a and the second side 24 b that are the long sides of the electrode body 24. The second blade portions 97 are opposed to each other in the circumferential direction. The interval in the circumferential direction between the second blade portions 97 is the same as the dimensions of the first side 24 a and the second side 24 b that are the long sides of the electrode body 24.
第１刃部９６と第２刃部９７とは、軸線方向の異なる位置に設けられている。第１刃部９６と第２刃部９７とは、周方向にずれて位置しており、軸線方向において一直線上に位置していない。第２刃部９７は、全ての外側刃部９５が軸線方向において一直線上に位置しないように周方向にずれて位置しているといえる。 The first blade portion 96 and the second blade portion 97 are provided at different positions in the axial direction. The 1st blade part 96 and the 2nd blade part 97 are shifted | deviated to the circumferential direction, and are not located on the straight line in the axial direction. It can be said that the 2nd blade part 97 has shifted | deviated to the circumferential direction so that all the outer blade parts 95 may not be located on a straight line in an axial direction.
第２実施形態のダイカット装置４４は、第１実施形態と同様に電極材料３０の短手方向に並んで二つの正極電極２１を切り出す。本実施形態では、塗工部３２の間に設けられた１つの未塗工部３３から、電極材料３０の短手方向に並んで切り出される各正極電極２１のタブ２５が切り出される。 The die cutting device 44 of the second embodiment cuts out the two positive electrodes 21 side by side in the short direction of the electrode material 30 as in the first embodiment. In this embodiment, the tab 25 of each positive electrode 21 cut out along with the short direction of the electrode material 30 is cut out from one uncoated part 33 provided between the coating parts 32.
第１刃部９６と第２刃部９７とが軸線方向に一直線上に位置しないようにすることで、帯状金属箔３１の短手方向に並んで切り出される正極電極２１は、異なるタイミングで切り出される。このため、対向刃部９１，９２の力が電極材料３０に加わっている状態が維持され、電極材料３０に張力を働かせながら電極材料３０を搬送することができる。 By preventing the first blade portion 96 and the second blade portion 97 from being positioned in a straight line in the axial direction, the positive electrode 21 cut out side by side in the short direction of the strip-shaped metal foil 31 is cut out at different timings. . For this reason, the state where the force of the opposing blade portions 91 and 92 is applied to the electrode material 30 is maintained, and the electrode material 30 can be conveyed while applying tension to the electrode material 30.
各対向刃部９１，９２は、塗工部３２が設けられた部位を切断することで、正極電極２１の第１辺２４ａを形成する。各内側刃部９４は、未塗工部３３を切断することでタブ２５を形成する。 Each opposing blade part 91,92 forms the 1st edge | side 24a of the positive electrode 21 by cut | disconnecting the site | part in which the coating part 32 was provided. Each inner blade portion 94 forms the tab 25 by cutting the uncoated portion 33.
縁切断刃部としての各外側刃部９５は、各塗工部３２を両縁Ｅ１，Ｅ２に至るまで切断することで、正極電極２１の第３辺２４ｃ及び第４辺２４ｄを形成する。
したがって、上記実施形態によれば、第１実施形態の効果（１）に加えて、以下のような効果を得ることができる。
Each outer blade part 95 as an edge cutting blade part forms the third side 24c and the fourth side 24d of the positive electrode 21 by cutting each coating part 32 until reaching both edges E1, E2.
Therefore, according to the said embodiment, in addition to the effect (1) of 1st Embodiment, the following effects can be acquired.
（４）帯状金属箔３１の短手方向に並んで切り出される各正極電極２１のタブ２５を、共通の未塗工部３３から切り出している。帯状金属箔３１の両縁Ｅ１，Ｅ２に沿う未塗工部３３のそれぞれからタブ２５を切り出す場合に比べて、未塗工部３３の数を少なくすることができ、電極材料３０の端材を減らすことができる。 (4) The tab 25 of each positive electrode 21 cut out in the short direction of the strip-shaped metal foil 31 is cut out from the common uncoated portion 33. Compared with the case where the tab 25 is cut out from each of the uncoated portions 33 along both edges E1 and E2 of the strip-shaped metal foil 31, the number of uncoated portions 33 can be reduced, and the end material of the electrode material 30 can be reduced. Can be reduced.
なお、上記実施形態は以下のように変更してもよい。
○第１実施形態において、ダイカット装置４４は、１つの電極材料３０から短手方向に並んで３つ以上の電極を切り出す装置であってもよい。この場合、電極材料３０は、帯状金属箔３１の短手方向に並んで複数の塗工部３２を備える。１つの電極材料３０から短手方向に並んで４つの電極を切り出す場合、刃は、例えば、図９に示す形状となる。図９に実線で示す刃８０は、第１実施形態に記載の刃６０を、ダイカットロール５２の軸線方向に２つ並べた形状である。また、図９に二点鎖線で示すように、刃８０は、軸線方向に隣り合う２つの第１軸線方向刃部６２同士が軸線方向において一直線上に位置する刃６０を、軸線方向に２つ並べた形状であってもよい。この場合、刃６０同士の第１軸線方向刃部６２を周方向にずらして位置させる。
In addition, you may change the said embodiment as follows.
In the first embodiment, the die cutting device 44 may be a device that cuts out three or more electrodes side by side from one electrode material 30 in the short direction. In this case, the electrode material 30 includes a plurality of coating portions 32 arranged in the short-side direction of the strip-shaped metal foil 31. In the case where four electrodes are cut out from one electrode material 30 in the lateral direction, the blade has a shape shown in FIG. 9, for example. A blade 80 indicated by a solid line in FIG. 9 has a shape in which two blades 60 described in the first embodiment are arranged in the axial direction of the die cut roll 52. Further, as shown by a two-dot chain line in FIG. 9, the blade 80 includes two blades 60 in the axial direction in which two first axial blade parts 62 adjacent in the axial direction are positioned in a straight line in the axial direction. It may be a side-by-side shape. In this case, the first axial blade portions 62 between the blades 60 are shifted and positioned in the circumferential direction.
即ち、１つの電極材料３０から短手方向に並んで３つ以上の電極を切り出す場合、刃６０は、軸線方向において異なる位置に設けられた第１軸線方向刃部６２を３つ以上備える。この場合、全ての第１軸線方向刃部６２が軸線方向に一直線上に位置しないように少なくとも１つの第１軸線方向刃部６２が周方向にずれて位置する。 That is, when three or more electrodes are cut out from one electrode material 30 in the lateral direction, the blade 60 includes three or more first axial blade portions 62 provided at different positions in the axial direction. In this case, at least one first axial blade 62 is displaced in the circumferential direction so that all the first axial blades 62 are not positioned in a straight line in the axial direction.
また、第２実施形態において、ダイカット装置４４は、１つの電極材料３０から短手方向に並んで３つ以上の電極を切り出す装置であってもよい。この場合、電極材料３０は、帯状金属箔３１の短手方向に並んで複数の未塗工部３３を備える。電極材料３０から４つの電極を切り出す場合、刃は、例えば、第２実施形態に記載の刃９０をダイカットロール５２の軸線方向に２つ並べ、かつ、軸線方向に並ぶ刃９０の境界に周方向に延びる刃を備えた形状となる。 Moreover, in 2nd Embodiment, the die-cut apparatus 44 may be an apparatus which cuts out three or more electrodes side by side from the one electrode material 30 in the transversal direction. In this case, the electrode material 30 includes a plurality of uncoated portions 33 arranged in the short-side direction of the strip-shaped metal foil 31. When four electrodes are cut out from the electrode material 30, for example, two blades 90 described in the second embodiment are arranged in the axial direction of the die-cut roll 52, and the blade is circumferential in the boundary of the blades 90 arranged in the axial direction. It becomes the shape provided with the blade extended in.
○各実施形態では、ダイカットロール５２が１周する間に、帯状金属箔３１の長手方向に２つの正極電極２１が切り出されるようにしたが、これに限られない。例えば、ダイカットロール５２が１周する間に、帯状金属箔３１の長手方向に３つ以上の正極電極２１が切り出されるようにしてもよいし、１つの正極電極２１が切り出されるようにしてもよい。この場合、ダイカットロール５２が１周する間に切り出したい正極電極２１の数に合わせて第１軸線方向刃部６２又は外側刃部９５の数を適宜変更する。 In each embodiment, the two positive electrodes 21 are cut out in the longitudinal direction of the strip-shaped metal foil 31 while the die-cut roll 52 makes one round, but the present invention is not limited to this. For example, three or more positive electrodes 21 may be cut out in the longitudinal direction of the strip-shaped metal foil 31 while the die cut roll 52 makes one round, or one positive electrode 21 may be cut out. . In this case, the number of the first axial blade portions 62 or the outer blade portions 95 is appropriately changed according to the number of the positive electrodes 21 to be cut while the die cut roll 52 makes one round.
○各実施形態において、弾性部材７１は設けられていなくてもよい。この場合であっても、第２周方向刃部６５で塗工部３２が切断されるようにすることで、第２周方向刃部６５とアンビルロール５１によって電極材料３０を挟持することができる。 In each embodiment, the elastic member 71 may not be provided. Even in this case, the electrode material 30 can be sandwiched between the second circumferential blade portion 65 and the anvil roll 51 by cutting the coating portion 32 with the second circumferential blade portion 65. .
○第１実施形態において、第２周方向刃部６５は、未塗工部３３を切断するようにしてもよい。この場合、ダイカットロール５２の外周面に弾性部材７１を設けて、弾性部材７１とアンビルロール５１とで電極材料３０を挟持する。この場合、電極本体２４の第１辺２４ａに沿って、活物質層２７の設けられていない露出部を備える電極が切り出される。 In the first embodiment, the second circumferential blade portion 65 may cut the uncoated portion 33. In this case, the elastic member 71 is provided on the outer peripheral surface of the die cut roll 52, and the electrode material 30 is sandwiched between the elastic member 71 and the anvil roll 51. In this case, an electrode including an exposed portion where the active material layer 27 is not provided is cut out along the first side 24 a of the electrode body 24.
○第２実施形態において、各対向刃部９１，９２は、未塗工部３３を切断するようにしてもよい。この場合、電極本体２４の第１辺２４ａに沿って、活物質層２７の設けられていない露出部を備える電極が切り出される。 In the second embodiment, the opposing blade portions 91 and 92 may cut the uncoated portion 33. In this case, an electrode including an exposed portion where the active material layer 27 is not provided is cut out along the first side 24 a of the electrode body 24.
○各実施形態において、刃６０，９０のうち、未塗工部３３を切断する部分の刃高を、塗工部３２を切断する刃６０，９０の刃高よりも高くしてもよい。また、アンビルロール５１のうち、未塗工部３３に接する部分の直径を塗工部３２に接する部分の直径よりも大きくしてもよい。これにより、ダイカットロール５２やアンビルロール５１の摩耗を抑制できる。 In each embodiment, the blade heights of the blades 60 and 90 that cut the uncoated portion 33 may be higher than the blade heights of the blades 60 and 90 that cut the coated portion 32. Moreover, you may make the diameter of the part which touches the uncoated part 33 among the anvil rolls 51 larger than the diameter of the part which contact | connects the coating part 32. FIG. Thereby, abrasion of the die cut roll 52 and the anvil roll 51 can be suppressed.
○各実施形態において、ダイカット装置４４は、負極電極用の電極材料３０を切断して負極電極２２を製造する装置であってもよい。
○鵜各実施形態では、マグネットロール５３にプレート５４を貼り付けることで、ロータリーダイ５０を構成したが、これに限られない。例えば、円筒状のダイカットロール５２と刃６０が一体のロータリーダイ５０を用いてもよい。
In each embodiment, the die cutting device 44 may be a device that manufactures the negative electrode 22 by cutting the electrode material 30 for the negative electrode.
In the embodiments, the rotary die 50 is configured by attaching the plate 54 to the magnet roll 53. However, the present invention is not limited to this. For example, the rotary die 50 in which the cylindrical die cut roll 52 and the blade 60 are integrated may be used.
○各実施形態において、電極材料３０は、帯状金属箔３１の片面に活物質合剤を塗布したものでもよい。 In each embodiment, the electrode material 30 may be one in which an active material mixture is applied to one side of the strip-shaped metal foil 31.
Ｅ１，Ｅ２…縁、１０…リチウムイオン二次電池、２１…正極電極（リチウムイオン二次電池用の電極）、３０…電極材料、３１…帯状金属箔、３２…塗工部、３３…未塗工部、４１…供給部、４４…ダイカット装置（電極製造装置）、５０…ロータリーダイ、５１…アンビルロール、５２…ダイカットロール、６０，９０…刃、６０Ａ，９０Ａ…周方向刃部、６０Ｂ，９０Ｂ…軸線方向刃部、６１…第１周方向刃部、６２…第１軸線方向刃部、６５…第２周方向刃部、６７…第２軸線方向刃部（縁切断刃部）、７１…弾性部材、９１，９２…対向刃部、９４…内側刃部、９５…外側刃部（縁切断刃部）。 E1, E2 ... edge, 10 ... lithium ion secondary battery, 21 ... positive electrode (electrode for lithium ion secondary battery), 30 ... electrode material, 31 ... strip metal foil, 32 ... coated part, 33 ... uncoated Engineering part, 41 ... Supply part, 44 ... Die cut device (electrode manufacturing device), 50 ... Rotary die, 51 ... Anvil roll, 52 ... Die cut roll, 60, 90 ... Blade, 60A, 90A ... Circumferential blade, 60B, 90B ... Axial direction blade part, 61 ... First circumferential direction blade part, 62 ... First axial direction blade part, 65 ... Second circumferential direction blade part, 67 ... Second axial direction blade part (edge cutting blade part), 71 ... elastic member, 91, 92 ... opposing blade part, 94 ... inner blade part, 95 ... outer blade part (edge cutting blade part).
Claims (6)
前記ダイカットロールの外周面に対向して配置されたアンビルロールと、を備え、
供給部から供給された長尺帯状の電極材料を前記ロータリーダイと前記アンビルロールとの間に通すことで前記刃によって切断されたリチウムイオン二次電池用の電極を得る電極製造装置であって、
前記電極材料は、長尺の帯状金属箔と、前記帯状金属箔の長手方向に延びるように前記帯状金属箔に活物質合剤を塗布した塗工部と、前記塗工部の長手方向に沿い、前記活物質合剤が塗布されていない未塗工部と、を備えるものであり、
前記刃は、
前記ダイカットロールの周方向に延びる複数の周方向刃部と、
前記周方向刃部からダイカットロールの軸線方向に延びる複数の軸線方向刃部と、を備え、
前記軸線方向刃部は、前記電極材料を前記帯状金属箔の短手方向の縁に至るまで切断する縁切断刃部を含み、
全ての前記軸線方向刃部が前記軸線方向に一直線上に位置しないように少なくとも１つの前記軸線方向刃部が前記周方向にずれて位置している電極製造装置。 A rotary die having a blade on the outer peripheral surface of the die cut roll;
An anvil roll disposed opposite the outer peripheral surface of the die cut roll,
An electrode manufacturing apparatus for obtaining an electrode for a lithium ion secondary battery cut by the blade by passing a long belt-like electrode material supplied from a supply unit between the rotary die and the anvil roll,
The electrode material includes a long strip-shaped metal foil, a coating portion obtained by applying an active material mixture to the strip-shaped metal foil so as to extend in the longitudinal direction of the strip-shaped metal foil, and a longitudinal direction of the coating portion. And an uncoated part to which the active material mixture is not applied, and
The blade is
A plurality of circumferential blade portions extending in the circumferential direction of the die cut roll;
A plurality of axial blade portions extending in the axial direction of the die cut roll from the circumferential blade portion, and
The axial blade portion includes an edge cutting blade portion that cuts the electrode material up to a short edge of the strip-shaped metal foil,
The electrode manufacturing apparatus in which at least one of the axial blade portions is shifted in the circumferential direction so that all the axial blade portions are not positioned in a straight line in the axial direction.
前記周方向刃部は、
前記塗工部を切断する少なくとも１つの第１周方向刃部と、
前記第１周方向刃部に対して前記軸線方向の両側に前記第１周方向刃部と間隔を空けて配置された複数の第２周方向刃部と、を備え、
前記軸線方向刃部は、
一端が前記第１周方向刃部に繋がり、他端が前記第２周方向刃部に繋がる複数の第１軸線方向刃部と、
一端が前記第２周方向刃部に繋がり、前記電極材料を前記帯状金属箔の短手方向の縁に至るまで切断する複数の第２軸線方向刃部と、を備え、
前記軸線方向の両端の前記第２周方向刃部の間の複数の前記第１軸線方向刃部は、全ての前記第１軸線方向刃部が前記軸線方向に一直線上に位置しないように少なくとも１つの前記第１軸線方向刃部が前記周方向にずれて位置している請求項１に記載の電極製造装置。 The uncoated part is provided along both edges in the short direction of the strip-shaped metal foil,
The circumferential blade is
At least one first circumferential blade portion for cutting the coating portion;
A plurality of second circumferential blade portions disposed at a distance from the first circumferential blade portion on both sides in the axial direction with respect to the first circumferential blade portion;
The axial blade portion is
A plurality of first axial blade portions having one end connected to the first circumferential blade portion and the other end connected to the second circumferential blade portion;
A plurality of second axial blade portions, one end of which is connected to the second circumferential blade portion and cuts the electrode material up to the short edge of the strip-shaped metal foil,
The plurality of first axial blade portions between the second circumferential blade portions at both ends in the axial direction are at least 1 so that all the first axial blade portions are not positioned in a straight line in the axial direction. The electrode manufacturing apparatus according to claim 1, wherein the first axial blade portions are shifted in the circumferential direction.
前記第１周方向刃部を１つ備え、
前記第１周方向刃部における前記軸線方向の両側の複数の前記第１軸線方向刃部が前記一直線上に位置しないように前記周方向にずれて位置している請求項２又は請求項３に記載の電極製造装置。 The blade is
One of the first circumferential blades,
The plurality of first axial blade portions on both sides in the axial direction of the first circumferential blade portion are shifted in the circumferential direction so as not to be positioned on the straight line. The electrode manufacturing apparatus as described.
前記周方向刃部は、
前記軸線方向に互いに対向する第１対向刃部及び第２対向刃部を備え、
前記軸線方向刃部は、
各対向刃部同士の間で延びる内側刃部と、
各対向刃部から前記内側刃部の延びる方向とは反対方向に延び、前記電極材料を前記帯状金属箔の短手方向の縁に至るまで切断する外側刃部とを備え、
全ての前記外側刃部が前記軸線方向に一直線上に位置しないように少なくとも１つの前記外側刃部が前記周方向にずれて位置している請求項１に記載の電極製造装置。 The uncoated part is provided between the coated parts provided at intervals in the short direction of the strip-shaped metal foil,
The circumferential blade is
A first opposed blade portion and a second opposed blade portion facing each other in the axial direction;
The axial blade portion is
An inner blade extending between the opposing blades, and
An outer blade that extends from each opposing blade in a direction opposite to the direction in which the inner blade extends, and cuts the electrode material to the edge in the short direction of the strip-shaped metal foil,
The electrode manufacturing apparatus according to claim 1, wherein at least one of the outer blade portions is displaced in the circumferential direction so that all the outer blade portions are not positioned in a straight line in the axial direction.
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| JPS5894997A (en) * | 1981-11-25 | 1983-06-06 | マツク・エンジニアリング・アンド・イクウイプメント・カンパニ−・インコ−ポレ−テツド | Cutter for battery plate |
| JPS60167262A (en) * | 1984-02-10 | 1985-08-30 | Matsushita Electric Ind Co Ltd | Device for manufacturing expanded plate |
| JP2001093515A (en) * | 1999-09-28 | 2001-04-06 | Honda Motor Co Ltd | Method of manufacturing electrode plate and apparatus using same |
| JP2002110146A (en) * | 2000-10-03 | 2002-04-12 | Mekatekku Kk | Manufacturing method of electrode member using rotary blade and manufacturing method of battery |
| JP2009181730A (en) * | 2008-01-29 | 2009-08-13 | Panasonic Corp | Lead-acid storage battery |
| JP2011081964A (en) * | 2009-10-05 | 2011-04-21 | Toshiba Corp | Manufacturing device of electrode, manufacturing method of electrode, electrode, and nonaqueous electrolyte battery |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020197266A1 (en) * | 2019-03-28 | 2020-10-01 | 주식회사 엘지화학 | Apparatus for manufacturing electrode for secondary battery, and electrode for secondary battery and secondary battery manufactured by same |
| CN115332542A (en) * | 2022-10-12 | 2022-11-11 | 楚能新能源股份有限公司 | Battery core pole piece substrate and pole piece production equipment |
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