JP2003068287A - Cutting device for battery electrode - Google Patents
Cutting device for battery electrodeInfo
- Publication number
- JP2003068287A JP2003068287A JP2001254534A JP2001254534A JP2003068287A JP 2003068287 A JP2003068287 A JP 2003068287A JP 2001254534 A JP2001254534 A JP 2001254534A JP 2001254534 A JP2001254534 A JP 2001254534A JP 2003068287 A JP2003068287 A JP 2003068287A
- Authority
- JP
- Japan
- Prior art keywords
- battery electrode
- cutting
- battery
- electrode
- cutting means
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Nonmetal Cutting Devices (AREA)
- Shearing Machines (AREA)
- Accessories And Tools For Shearing Machines (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、電池電極切断装置
に関し、帯状の部材の表面に連続的に一様な厚さの塗布
層を形成した部材から所望の幅の電池電極を切断して製
造する電池電極切断装置に関する。
【０００２】
【従来の技術】携帯用の各種の機器に用いられている小
型の電子機器用の電源として用いられる電池として小型
で大容量のリチウムイオン二次電池等が用いられてい
る。これらの電池の正極電極は、アルミニウム箔からな
る帯状の集電体に正極活物質を塗布したものが用いられ
ており、また負極電極は、銅箔からなる帯状の負極集電
体に負極活物質を塗布したものが用いられている。そし
て、負極電極および正極電極をセパレータを介して多数
回巻回して作製した電池要素を円筒状の電池缶に収納し
たり、あるいは糸巻き状に巻回した電池要素を、扁平状
に成形を行って角型状の電池缶に収納し、電解液を注入
した後に封口して製造されている。
【０００３】帯状の集電体への電池活物質の塗布には、
各種の方法が採用されているが、連続的に走行する帯状
の部材へ電池活物質を液体中に分散したスラリーをスリ
ット状のノズルから流出させる方法が一般に用いられて
いる。正極電極あるいは負極電極は、それぞれ電池の大
きさに応じて幅あるいは長さが適宜選ばれている。電気
自動車等の動力用の電源等に用いられる電池には、電極
の幅が大きなものがあるが、携帯機器用電池に用いられ
る電極は一般には、幅は数十ｍｍである。このため、こ
れらの電池の電極の製造においては、幅が広い集電体上
に、正極活物質あるいは負極活物質を広い幅で一様に塗
布した後に、所定の幅に裁断することが行われていた。
【０００４】図３は、従来の電池電極の切断工程を説明
する図であり、図３（Ａ）は斜視図であり、図３（Ｂ）
は、切断手段の前後を上面から見た平面図であり、図３
（Ｃ）は、図３（Ａ）における切断手段の中心軸を含む
面で切断した断面を説明する図である。電池電極は、電
池活物質の塗布装置において、集電体となる帯状部材は
バックアップロールに巻きつけられながら走行し、スリ
ットノズル等から加圧された電池活物質の塗布液が押し
出されて帯状部材の表面に所望の厚さの塗膜が形成され
る。塗膜は乾燥手段において加熱乾燥された後に巻き取
られる。一方の面に塗膜が形成された後に他方の面にも
同様に塗布されて加熱乾燥が行われて電池電極の原反が
作製される。電池電極切断装置１において、電池電極の
原反２は、巻回体から引き出されて走行方向Ａに搬送さ
れ、所望の間隔で複数個の切断刃３を設けた切断手段４
によって走行状態で走行方向に平行に切断されて所望の
幅の電池電極５とされて巻き取りリール６によって巻き
取られる。
【０００５】このように帯状の部材を走行中に切断する
方法は、効率的に電極を製造することが可能な方法であ
るが、製造した電池電極５には裁断面の角部に形状が不
良であるバリや凹凸、ギザギザが生じることがある。電
池電極にバリや凹凸、ギザギザが生じると、セパレータ
を介して対極と対向させた際に、バリによってセパレー
タに傷をつけ、甚だしい場合には対極との間で短絡を生
じるという問題点があった。このために、バリが発生し
た電極は電池要素の作製工程で使用することができず廃
棄せざるを得ないという問題点があった。特に原反の端
部から切断した電池電極は、バリが発生しやすいとう問
題点があった。これは、図３（Ｃ）に示すように、電池
電極の原反の両端部７および８は長さ方向へ張力を与え
られるものの、両端部には保持部材がないために与えら
れている張力では両端部にたるみ等の現象が生じる結
果、切断刃との接触状態が好ましくないものとなる結
果、切断面が粗くなる等の現象が生じるものと考えられ
る。
【０００６】このような問題点を解決する方法として、
特開平１０−６１２６号公報には、リチウムイオン電池
の原反の切断装置において、裁断された際に不要とされ
る原反の耳部は、下方に導かれるものの張力がかかって
おらず、単に下っていくだけであったので、耳部とその
隣の裁断後の帯状部材との間の切断面の形状が不良とな
ることを防止するために、帯状部材の端部を切断し、切
断した帯状の端部とその残部とを分離する際に残部に張
力を与える切断装置が提案されている。しかしながら、
このような装置でも切断面から、帯状体の端部から切断
した電極にはバリ等をなくすことはできなかった。
【０００７】また、特開２０００−２１５８８５号公報
には、円筒状ロールの外周面に一体的に嵌合された円筒
形切断刃の両側面を挾着してクッション性ゴム円筒体を
設けることによって、切断時に電極合剤の離脱やバリの
発生を防止する方法が提案されている。しかし、このよ
うな装置では、電池電極の走行速度とクッション性ゴム
円筒体の回転速度とが変動した場合には、電池電極の張
力が大きく変化し、バリの発生等が生じる危険性があっ
た。
【０００８】
【発明が解決しようとする課題】本発明は、連続して走
行する帯状の部材に一様な厚さの活物質層の塗膜を形成
した後に、所望の幅に切断して電極を製造する電池電極
切断装置において、切断面にバリが生じることがない電
池電極の製造が可能な電池電極切断装置を提供すること
を課題とするものである。
【０００９】
【課題を解決するための手段】本発明の課題は、集電体
上に活物質層を形成した帯状の部材を走行させながら切
断して複数の電池電極を製造する電池電極切断装置にお
いて、電池電極の両面に対向して配置した切断手段の両
端部に設けた切断刃の外側に、電池電極を両面から挟持
する電池電極押さえロールを、切断手段の回転軸に回転
自在に取り付けた電池電極切断装置によって解決するこ
とができる。また、電池電極押さえロールは、表面に緩
衝層を設けた前記の電池電極切断手段である。電池電極
が非水電解液電池用の電極である前記の電池電極切断手
段である。
【００１０】
【発明の実施の形態】本発明の電池電極切断装置は、帯
状の部材に電極活物質の塗膜を形成した後に、走行する
帯状の部材を切断手段によって、走行方向に所定の幅に
切断して複数の電極を製造した場合に生じるバリ、ある
いは寸法異常は、帯状部材の張力を一定に保持すること
によって防止することが可能であることを見いだしたも
のである。る。すなわち、バリは切断手段の前後におけ
る帯状部材と切断手段との相互の関係によって生じるも
のであり、特に両端部に位置する電池電極の切断は、電
池電極の原反の両端部に一定の張力が与えられないので
バリが発生しやすいが、両端部の切断刃の外側に電池電
極を両面から挟持し、切断手段の回転軸の周りを自由に
回転可能な電池電極押さえロールを設けることによっ
て、電池電極の走行速度、切断手段の回転速度等が変動
を生じた場合であっても電池電極を安定して切断するこ
とができるので、電極の端面にはバリが生じないことを
見いだしたものである。
【００１１】以下に図面を参照して本発明を説明する。
図１は、本発明の電池電極の切断装置を説明する図であ
り、図１（Ａ）は斜視図であり、図１（Ｂ）は切断手段
の前後の平面図である。電池電極は、電池活物質の塗布
装置において、集電体となる帯状部材はバックアップロ
ールに巻きつけられながら走行し、スリットノズル等か
ら加圧された電池活物質の塗布液が押し出されて帯状部
材の表面に所望の厚さの塗膜が形成される。塗膜は乾燥
手段において加熱乾燥された後に巻き取られる。一方の
面に塗膜が形成された後に他方の面にも同様に塗布され
て加熱乾燥が行われて電池電極の原反が作製される。
【００１２】電池電極切断装置１において、電池電極の
原反２は巻回体から走行方向Ａに引き出され、複数の切
断刃３を取り付けた上部切断手段４Ａ、および下部切断
手段４Ｂによって切断が行われて所望の幅の電池電極５
とされて、巻き取りロール６によって巻き取られる。上
部切断手段４Ａおよび下部切断手段４Ｂの両端部に配置
された切断刃３の外側には、上部電池電極押さえロール
９Ａおよび下部電池電極押さえロール９Ｂが配置されて
おり、電池電極の両端部７および８は、これらの上部電
池電極押さえロール９Ａおよび下部電池電極押さえロー
ル９Ｂによって上下から挟持された状態で切断が行われ
る。
【００１３】図２は、電池電極押さえロールを説明する
図であり、図２（Ａ）は、切断手段の軸の面で切断した
断面図の一部を示す図であり、また図２（Ｂ）は、電池
電極押さえロールを切断手段の軸に垂直な面で切断した
断面図である。図２（Ａ）に示すように、電池電極の本
発明の電池電極切断装置では、両端部の切断刃の外側に
は、上部電池電極押さえロール９Ａと下部電池電極押さ
えロール９Ｂが配置されている。したがって、電池電極
の原反の両端部７は、電池電極押さえロールによって挟
持された状態で電池電極の切断が行われる。しかも、図
２（Ｂ）に示すように、上部電池電極押さえロール９Ａ
および下部電池電極押さえロール９Ｂのいずれもが、切
断手段の軸１０の周囲を自由に回転可能な軸受１１によ
って取り付けられており、各電池電極押さえロールの表
面には、ゴム等のクッション性を有する緩衝層１２が形
成されているので、電池電極の原反の両端部には、張力
が与えられた状態で切断が行われる。
【００１４】以上のように本発明の切断手段には、上部
電池電極押さえロールと下部電池電極押さえロールが切
断手段の回転軸に自由に回転可能な軸によって取り付け
られているので、切断手段の回転軸の回転速度と電池電
極の走行速度とに変動が生じた場合でも、円滑に電池電
極の切断を行うことができ、電池電極の切断面にバリが
生じたり、あるいは寸法異常等が生じることがなくな
る。また、軸の周囲を自由に回転可能な軸受には、円滑
な回転が可能であればボールベアリング等をはじめとす
る任意の軸受けによって構成することができる。
【００１５】本発明の電池電極切断装置は、帯状の集電
体上に活物質の塗布層を形成した各種の電池電極の製造
に適用することが可能であるが、リチウムイオン二次電
池の正極電極および負極電極の製造の場合を例に挙げて
説明すると、正極電極は帯状のアルミニウム箔に、リチ
ウム遷移金属複合酸化物、例えば、ＬｉxＣｏＯ2、Ｌｉ
xＮｉＯ2、ＬｉxＭｎ2Ｏ4、ＬｉxＭｎＯ3、ＬｉxＮｉy
Ｃｏ(1-y)Ｏ2 などを、カーボンブラック等の導電性物
質、ポリフッ化ビニリデン（ＰＶＤＦ）等の結着剤をＮ
−メチル−２−ピロリドン（ＮＭＰ）等の溶剤と分散混
練した調製した正極塗料が本発明の塗布装置によって塗
布される。片面の塗布が終わったものは乾燥後に反対面
も同様に塗布し、両面を塗布される。
【００１６】負極電極は、帯状の銅箔等の表面に、リチ
ウムをドープ及び脱ドープ可能な、熱分解炭素類、ピッ
チコークス、ニードルコークス、石油コークスなどのコ
ークス類、グラファイト類、ガラス状炭素類、フェノー
ル樹脂、フラン樹脂などを焼成した有機高分子化合物焼
成体、炭素繊維、活性炭などの炭素質材料、ポリアセチ
レン、ポリピロール等の導電性高分子材料をカーボンブ
ラックなどの導電性物質、ポリフッ化ビニリデン（ＰＶ
ＤＦ）等の結着剤をＮ−メチル−２−ピロリドン（ＮＭ
Ｐ）等の溶剤とを分散混練した調製した負極塗布液を本
発明の塗布装置によって塗布される。片面の塗布が終わ
ったものは乾燥後に反対面も同様に塗布し、両面を塗布
される。
【００１７】
【発明の効果】本発明の電池電極切断装置によれば、幅
広の帯状の部材上に活物質層を形成して電池電極を切断
して所望の幅の電池電極を製造する際に、帯状の部材の
切り取り位置によらずに切断面にバリが生じることはな
いので、原反を有効に利用することができ、セパレータ
を介して巻回した場合には、セパレータに損傷を与えて
対極との間で短絡を生じる等の問題がない電池電極を製
造することができる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery electrode cutting device, and more particularly to a device for cutting a battery-like electrode from a member in which a coating layer having a uniform thickness is continuously formed on the surface of a belt-like member. The present invention relates to a battery electrode cutting device manufactured by cutting a battery electrode having a width of. 2. Description of the Related Art Small and large-capacity lithium-ion secondary batteries and the like are used as batteries used as power supplies for small electronic devices used in various portable devices. The positive electrode of these batteries is a material in which a positive electrode active material is applied to a band-shaped current collector made of aluminum foil, and the negative electrode is a negative electrode active material formed of a band-shaped negative electrode current collector made of copper foil. Is applied. Then, the battery element produced by winding the negative electrode and the positive electrode many times through a separator is housed in a cylindrical battery can, or the battery element wound in a thread form is formed into a flat shape. It is housed in a rectangular battery can, filled with an electrolyte, and sealed. [0003] To apply a battery active material to a belt-like current collector,
Various methods have been adopted, and a method in which a slurry in which a battery active material is dispersed in a liquid is allowed to flow out of a slit-shaped nozzle to a continuously running belt-shaped member is generally used. The width or length of the positive electrode or the negative electrode is appropriately selected according to the size of the battery. Some batteries used for power sources and the like for power of electric vehicles and the like have a large electrode width, but the electrodes used for batteries for portable devices generally have a width of several tens of mm. For this reason, in the production of the electrodes of these batteries, a positive electrode active material or a negative electrode active material is uniformly applied over a wide current collector over a wide width, and then cut into a predetermined width. I was FIG. 3 is a diagram for explaining a conventional battery electrode cutting process. FIG. 3A is a perspective view, and FIG.
FIG. 3 is a plan view of the front and rear of the cutting means as viewed from above, and FIG.
FIG. 3C is a diagram illustrating a cross-section taken along a plane including the central axis of the cutting unit in FIG. In the battery active material coating apparatus, the battery electrode runs while the belt-like member serving as a current collector is wound around a backup roll, and the coating liquid of the battery active material pressurized from a slit nozzle or the like is extruded to form a band-like member. A coating film having a desired thickness is formed on the surface of the substrate. The coating film is wound after being dried by heating in a drying means. After a coating film is formed on one surface, it is similarly applied to the other surface, and is heated and dried to produce a raw material of a battery electrode. In the battery electrode cutting device 1, the raw material 2 of the battery electrode is pulled out of the wound body and transported in the traveling direction A, and is provided with a cutting means 4 provided with a plurality of cutting blades 3 at desired intervals.
In the running state, the battery electrode 5 is cut in parallel to the running direction to form a battery electrode 5 having a desired width, and is wound up by the winding reel 6. [0005] The method of cutting the belt-like member while traveling is a method capable of efficiently manufacturing an electrode, but the manufactured battery electrode 5 has a defective shape at the corner of the cut surface. Burrs, unevenness and jaggedness may occur. When burrs, irregularities, and jaggedness occur on the battery electrode, when facing the counter electrode via the separator, there was a problem that the separator would be damaged by the burr, and in severe cases, a short circuit would occur with the counter electrode. . For this reason, there has been a problem that the electrode on which burrs are generated cannot be used in the process of manufacturing the battery element and must be discarded. Particularly, the battery electrode cut from the end of the raw material has a problem that burrs are easily generated. This is because, as shown in FIG. 3 (C), although tension is applied to both ends 7 and 8 of the raw material of the battery electrode in the length direction, the tension is applied because there is no holding member at both ends. In this case, it is considered that a phenomenon such as a slack occurs at both ends, a contact state with the cutting blade becomes unfavorable, and a phenomenon such as a roughened cut surface occurs. As a method for solving such a problem,
Japanese Patent Application Laid-Open No. H10-6126 discloses that in a device for cutting a raw material of a lithium ion battery, an ear portion of the raw material that is unnecessary when cut is guided downward but is not subjected to tension. Since it was only going down, in order to prevent the shape of the cut surface between the ear portion and the adjacent strip-shaped member from becoming defective, the end of the strip-shaped member was cut and the cut strip-shaped member was cut. There has been proposed a cutting device for applying tension to the remaining portion when separating the end portion from the remaining portion. However,
Even with such an apparatus, it was not possible to eliminate burrs and the like from the cut surface and from the electrode cut from the end of the strip. In Japanese Patent Application Laid-Open No. 2000-215885, a cushioning rubber cylinder is provided by sandwiching both sides of a cylindrical cutting blade integrally fitted on the outer peripheral surface of a cylindrical roll. In addition, there has been proposed a method of preventing detachment of the electrode mixture and generation of burrs at the time of cutting. However, in such a device, when the running speed of the battery electrode and the rotation speed of the cushioning rubber cylinder fluctuate, the tension of the battery electrode greatly changes, and there is a risk of generating burrs and the like. . SUMMARY OF THE INVENTION The present invention relates to a method for forming an electrode on a continuously running belt-like member by forming a coating film of an active material layer having a uniform thickness and cutting the active material layer into a desired width. It is an object of the present invention to provide a battery electrode cutting device capable of manufacturing a battery electrode in which no burr occurs on a cut surface in a battery electrode cutting device for manufacturing the same. An object of the present invention is to provide a battery electrode cutting apparatus for manufacturing a plurality of battery electrodes by cutting a belt-like member having an active material layer formed on a current collector while traveling. In the above, outside the cutting blades provided at both ends of the cutting means arranged opposite to both sides of the battery electrode, a battery electrode holding roll for holding the battery electrode from both sides was rotatably attached to the rotating shaft of the cutting means. This can be solved by a battery electrode cutting device. The battery electrode pressing roll is the above-mentioned battery electrode cutting means provided with a buffer layer on the surface. The battery electrode is the battery electrode cutting means, wherein the battery electrode is an electrode for a non-aqueous electrolyte battery. DETAILED DESCRIPTION OF THE INVENTION A battery electrode cutting apparatus of the present invention forms a coating of an electrode active material on a strip-shaped member and then cuts the running strip-shaped member by a cutting means to a predetermined width in the running direction. It has been found that burrs or dimensional abnormalities that occur when a plurality of electrodes are manufactured by cutting into pieces can be prevented by keeping the tension of the belt-shaped member constant. You. That is, the burrs are caused by the mutual relationship between the band-shaped member and the cutting means before and after the cutting means. In particular, when the battery electrodes located at both ends are cut, a constant tension is applied to both ends of the raw material of the battery electrodes. Since it is not provided, burrs are likely to occur, but the battery electrode is sandwiched from both sides outside the cutting blades at both ends, and the battery electrode holding roll that can freely rotate around the rotation axis of the cutting means is provided. Even when the running speed of the electrode, the rotation speed of the cutting means, etc. fluctuate, the battery electrode can be cut stably, so that no burrs are formed on the end face of the electrode. . The present invention will be described below with reference to the drawings.
FIG. 1 is a view for explaining a device for cutting a battery electrode of the present invention. FIG. 1 (A) is a perspective view, and FIG. 1 (B) is a plan view before and after cutting means. In the battery active material coating apparatus, the battery electrode runs while the belt-like member serving as a current collector is wound around a backup roll, and the coating liquid of the battery active material pressurized from a slit nozzle or the like is extruded to form a band-like member. A coating film having a desired thickness is formed on the surface of the substrate. The coating film is wound after being dried by heating in a drying means. After a coating film is formed on one surface, it is similarly applied to the other surface, and is heated and dried to produce a raw material of a battery electrode. In the battery electrode cutting device 1, the raw material 2 of the battery electrode is pulled out from the wound body in the running direction A, and cut by the upper cutting means 4A and the lower cutting means 4B to which a plurality of cutting blades 3 are attached. Battery electrode 5 of desired width
And taken up by the take-up roll 6. Outside the cutting blades 3 arranged at both ends of the upper cutting means 4A and the lower cutting means 4B, an upper battery electrode pressing roll 9A and a lower battery electrode pressing roll 9B are arranged, and both ends 7 of the battery electrode and 8 is cut while being held from above and below by the upper battery electrode pressing roll 9A and the lower battery electrode pressing roll 9B. FIG. 2 is a view for explaining a battery electrode pressing roll. FIG. 2A is a view showing a part of a cross-sectional view taken along the axis of the cutting means, and FIG. () Is a cross-sectional view of the battery electrode pressing roll cut along a plane perpendicular to the axis of the cutting means. As shown in FIG. 2 (A), in the battery electrode cutting apparatus of the present invention for a battery electrode, an upper battery electrode pressing roll 9A and a lower battery electrode pressing roll 9B are arranged outside the cutting blades at both ends. . Therefore, the battery electrode is cut in a state in which both ends 7 of the original battery electrode are sandwiched by the battery electrode pressing rolls. In addition, as shown in FIG.
Each of the lower battery electrode pressing rolls 9B is attached by a bearing 11 that can freely rotate around a shaft 10 of the cutting means, and the surface of each battery electrode pressing roll has a cushioning property such as rubber. Since the buffer layer 12 is formed, both ends of the original material of the battery electrode are cut under tension. As described above, in the cutting means of the present invention, the upper battery electrode pressing roll and the lower battery electrode pressing roll are attached to the rotating shaft of the cutting means by freely rotatable shafts. Even when the rotation speed of the shaft and the traveling speed of the battery electrode fluctuate, the battery electrode can be cut smoothly, and burrs may occur on the cut surface of the battery electrode, or dimensional abnormalities may occur. Disappears. In addition, the bearing that can freely rotate around the shaft can be constituted by an arbitrary bearing such as a ball bearing if smooth rotation is possible. The battery electrode cutting device of the present invention can be applied to the manufacture of various battery electrodes in which an active material coating layer is formed on a belt-shaped current collector. The case of manufacturing an electrode and a negative electrode will be described by way of example. The positive electrode is formed on a strip-shaped aluminum foil by using a lithium transition metal composite oxide, for example, Li x CoO 2 , Li
x NiO 2 , Li x Mn 2 O 4 , Li x MnO 3 , Li x Ni y
Co (1-y ) O 2 or the like, a conductive substance such as carbon black, a binder such as polyvinylidene fluoride (PVDF) or the like.
The prepared positive electrode paint dispersed and kneaded with a solvent such as -methyl-2-pyrrolidone (NMP) is applied by the coating apparatus of the present invention. After the coating on one side is completed, the opposite side is similarly coated after drying, and both sides are coated. The negative electrode is made of a pyrolytic carbon, a pitch coke, a needle coke, a petroleum coke, a coke, a graphite, a glassy carbon which can be doped and dedoped with lithium on the surface of a strip-shaped copper foil or the like. Baked organic polymer compound obtained by firing phenol resin, furan resin, etc., carbon fiber materials such as carbon fiber and activated carbon, conductive polymer materials such as polyacetylene and polypyrrole, conductive materials such as carbon black, polyvinylidene fluoride ( PV
DF) and the like as N-methyl-2-pyrrolidone (NM
The negative electrode coating solution prepared by dispersing and kneading a solvent such as P) is applied by the coating apparatus of the present invention. After the coating on one side is completed, the opposite side is similarly coated after drying, and both sides are coated. According to the battery electrode cutting device of the present invention, an active material layer is formed on a wide band-shaped member and the battery electrode is cut to produce a battery electrode of a desired width. Since the burr does not occur on the cut surface regardless of the cutting position of the band-shaped member, the raw material can be effectively used, and when wound through a separator, the separator may be damaged. It is possible to manufacture a battery electrode free from problems such as short-circuiting with the counter electrode.
【図面の簡単な説明】
【図１】図１は、本発明の電池電極の切断装置を説明す
る図である。
【図２】図２は、電池電極押さえロールを説明する図で
ある。
【図３】図３は、従来の電池電極の切断工程を説明する
図である。
【符号の説明】
１…電池電極切断装置、２…電池電極の原反、３…切断
刃、４…切断手段、４Ａ…上部切断手段、４Ｂ…下部切
断手段、５…電池電極、７，８…電池電極の原反の両端
部、９Ａ…上部電池電極押さえロール、９Ｂ…下部電池
電極押さえロール、１０…切断手段の軸、１１…軸受、
１２…緩衝層、Ａ…走行方向BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram illustrating a battery electrode cutting device according to the present invention. FIG. 2 is a diagram illustrating a battery electrode pressing roll. FIG. 3 is a view for explaining a conventional battery electrode cutting step. DESCRIPTION OF SYMBOLS 1 ... Battery electrode cutting device, 2 ... Battery of battery electrode, 3 ... Cutting blade, 4 ... Cutting means, 4A ... Upper cutting means, 4B ... Lower cutting means, 5 ... Battery electrode, 7, 8 ... Both ends of the raw material of the battery electrode, 9A... Upper battery electrode pressing roll, 9B... Lower battery electrode pressing roll, 10... Shaft of cutting means, 11.
12: buffer layer, A: running direction
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 5H029 AJ14 AK03 AL06 AL07 CJ04 CJ30 EJ04 EJ12 5H050 AA19 BA17 CA08 CA09 CB07 CB08 EA10 EA23 GA04 GA29 ────────────────────────────────────────────────── ─── Continuation of front page F term (reference) 5H029 AJ14 AK03 AL06 AL07 CJ04 CJ30 EJ04 EJ12 5H050 AA19 BA17 CA08 CA09 CB07 CB08 EA10 EA23 GA04 GA29
Claims (1)
材を走行させながら切断して複数の電池電極を製造する
電池電極切断装置において、電池電極の両面に対向して
配置した切断手段の両端部に設けた切断刃の外側に、電
池電極を両面から挟持する電池電極押さえロールを、切
断手段の回転軸に回転自在に取り付けたことを特徴とす
る電池電極切断装置。Claims: 1. A battery electrode cutting apparatus for manufacturing a plurality of battery electrodes by cutting a belt-shaped member having an active material layer formed thereon on a current collector while running the battery member. A battery electrode, wherein a battery electrode holding roll for holding a battery electrode from both sides is rotatably attached to a rotating shaft of the cutting means, outside of a cutting blade provided at both ends of the cutting means arranged to face each other. Cutting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001254534A JP4669641B2 (en) | 2001-08-24 | 2001-08-24 | Battery electrode cutting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001254534A JP4669641B2 (en) | 2001-08-24 | 2001-08-24 | Battery electrode cutting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003068287A true JP2003068287A (en) | 2003-03-07 |
| JP4669641B2 JP4669641B2 (en) | 2011-04-13 |
Family
ID=19082686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001254534A Expired - Lifetime JP4669641B2 (en) | 2001-08-24 | 2001-08-24 | Battery electrode cutting device |
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| Country | Link |
|---|---|
| JP (1) | JP4669641B2 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006172827A (en) * | 2004-12-14 | 2006-06-29 | Dainippon Printing Co Ltd | Clearance determination method of gang edge cutting device, cutting method by gang edge cutting device, and gang edge cutting device |
| CN100453280C (en) * | 2005-03-30 | 2009-01-21 | 深圳市比克电池有限公司 | Cutter head assembly and bar breaking tool device |
| WO2011016243A1 (en) * | 2009-08-07 | 2011-02-10 | パナソニック株式会社 | Non-aqueous electrolyte secondary battery and method for manufacturing same |
| KR101211804B1 (en) * | 2005-12-19 | 2012-12-12 | 삼성에스디아이 주식회사 | Slitting device of electrode plate for lithium rechargeable battery |
| CN104589146A (en) * | 2014-12-31 | 2015-05-06 | 长兴荣力机械有限公司 | Electrode lug cutting machine |
| CN105382345A (en) * | 2015-11-25 | 2016-03-09 | 铜陵市金利电子有限公司 | Stripping blade for lithium pole piece |
| CN110546785A (en) * | 2017-11-20 | 2019-12-06 | 株式会社Lg化学 | Method for manufacturing irregular electrode |
| CN112247590A (en) * | 2020-10-24 | 2021-01-22 | 江西美特芯新能源有限公司 | Automatic cutting device for lithium core pole pieces |
| US11508986B2 (en) | 2018-01-24 | 2022-11-22 | Lg Energy Solution, Ltd. | Electrode transfer device for battery cell |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000094385A (en) * | 1998-09-18 | 2000-04-04 | Sony Chem Corp | Slitter device |
| JP2000215885A (en) * | 1999-01-20 | 2000-08-04 | Toshiba Battery Co Ltd | Cutting device for polymer battery electrode |
-
2001
- 2001-08-24 JP JP2001254534A patent/JP4669641B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000094385A (en) * | 1998-09-18 | 2000-04-04 | Sony Chem Corp | Slitter device |
| JP2000215885A (en) * | 1999-01-20 | 2000-08-04 | Toshiba Battery Co Ltd | Cutting device for polymer battery electrode |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006172827A (en) * | 2004-12-14 | 2006-06-29 | Dainippon Printing Co Ltd | Clearance determination method of gang edge cutting device, cutting method by gang edge cutting device, and gang edge cutting device |
| CN100453280C (en) * | 2005-03-30 | 2009-01-21 | 深圳市比克电池有限公司 | Cutter head assembly and bar breaking tool device |
| KR101211804B1 (en) * | 2005-12-19 | 2012-12-12 | 삼성에스디아이 주식회사 | Slitting device of electrode plate for lithium rechargeable battery |
| WO2011016243A1 (en) * | 2009-08-07 | 2011-02-10 | パナソニック株式会社 | Non-aqueous electrolyte secondary battery and method for manufacturing same |
| CN104589146A (en) * | 2014-12-31 | 2015-05-06 | 长兴荣力机械有限公司 | Electrode lug cutting machine |
| CN105382345A (en) * | 2015-11-25 | 2016-03-09 | 铜陵市金利电子有限公司 | Stripping blade for lithium pole piece |
| CN110546785A (en) * | 2017-11-20 | 2019-12-06 | 株式会社Lg化学 | Method for manufacturing irregular electrode |
| US11508986B2 (en) | 2018-01-24 | 2022-11-22 | Lg Energy Solution, Ltd. | Electrode transfer device for battery cell |
| CN112247590A (en) * | 2020-10-24 | 2021-01-22 | 江西美特芯新能源有限公司 | Automatic cutting device for lithium core pole pieces |
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|---|---|
| JP4669641B2 (en) | 2011-04-13 |
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