JP4565953B2 - Electrode plate manufacturing method and manufacturing apparatus - Google Patents

Electrode plate manufacturing method and manufacturing apparatus Download PDF

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JP4565953B2
JP4565953B2 JP2004289290A JP2004289290A JP4565953B2 JP 4565953 B2 JP4565953 B2 JP 4565953B2 JP 2004289290 A JP2004289290 A JP 2004289290A JP 2004289290 A JP2004289290 A JP 2004289290A JP 4565953 B2 JP4565953 B2 JP 4565953B2
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electrode plate
intermediate product
active material
roll
electrode active
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JP2006107787A (en
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智也 佐々木
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Dai Nippon Printing Co Ltd
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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
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Description

本発明は、電極板の製造方法及び製造装置に関する。   The present invention relates to an electrode plate manufacturing method and a manufacturing apparatus.

一般に電極板は、電極活物質層が集電体の少なくとも一面に設けられて構成されている。電極板の製造方法は、少なくとも、集電体を準備する工程と、電極活物質層用塗工組成物を調製する工程と、該電極活物質層用塗工組成物を集電体に塗布することにより電極活物質層を形成し、乾燥するコーティング工程と、該電極活物質層が形成された集電体を圧延するプレス工程と、該プレスした集電体を所定の大きさに切断するスリット工程を有する。電子機器の小型化・軽量化・高性能化に伴い、前記コーティング工程では、電極活物質層用塗工組成物を塗布した塗工部と塗布していない非塗工部を順次形成する間欠塗布方式が広く用いられている。   In general, an electrode plate is configured such that an electrode active material layer is provided on at least one surface of a current collector. The electrode plate manufacturing method includes at least a step of preparing a current collector, a step of preparing a coating composition for an electrode active material layer, and applying the electrode active material layer coating composition to a current collector. A coating step for forming and drying the electrode active material layer, a pressing step for rolling the current collector on which the electrode active material layer is formed, and a slit for cutting the pressed current collector into a predetermined size Process. As electronic devices become smaller, lighter, and higher in performance, in the coating process, an intermittent application is performed in which a coating part to which the electrode active material layer coating composition is applied and an uncoated part that has not been applied are sequentially formed. The method is widely used.

前記プレス工程においては、図３に示すように第１ロール１６ａと第２ロール１６ｂから成る一対のプレスロールを用い、電極活物質層１３が形成された集電体１４を圧延する。プレスを充分に行うために、第１ロール１６ａを支持する回転軸(中心軸)の両側に、押圧方向の付勢力Ｆが加えられる。この付勢力Ｆに対して第２ロール１６ｂ及びウエブ１７からの反力ｓが発生し、この反力ｓによって第１回転軸が撓み、第１ロール１６ａは、第１ロールの軸方向中央が付勢力Ｆの付勢方向と反対方向に浮き上がり、両側が付勢力Ｆの付勢方向に沈み込んだ形状に歪む。そこで、上記のロール歪みを防止するために、第１ロールを支持する回転軸（中心軸）の両側に付勢力Ｆに対して反対方向の付勢力ｆを負荷することが行われている。   In the pressing step, as shown in FIG. 3, the current collector 14 on which the electrode active material layer 13 is formed is rolled using a pair of press rolls composed of a first roll 16a and a second roll 16b. In order to sufficiently perform the pressing, an urging force F in the pressing direction is applied to both sides of the rotating shaft (center axis) that supports the first roll 16a. A reaction force s from the second roll 16b and the web 17 is generated against the urging force F. The first rotation shaft is bent by the reaction force s, and the first roll 16a is attached to the center in the axial direction of the first roll. It floats in the direction opposite to the urging direction of the force F, and both sides are distorted into a shape that sinks in the urging direction of the urging force F. Therefore, in order to prevent the above-described roll distortion, an urging force f in a direction opposite to the urging force F is applied to both sides of the rotation shaft (center axis) that supports the first roll.

図３に示すように、電極板の電極活物質層１３が均一に形成されている領域では、第１ロール１６ａの付勢力Ｆと反力ｓ及び矯正のための付勢力ｆとのバランスがとれているので、第１ロール１６ａは歪まず、プレス工程を支障なく行うことができる。   As shown in FIG. 3, in the region where the electrode active material layer 13 of the electrode plate is uniformly formed, the urging force F and the reaction force s of the first roll 16a and the urging force f for correction are balanced. Therefore, the first roll 16a is not distorted, and the pressing process can be performed without hindrance.

しかしながら、多くの場合に電極板には、端子取り出し等のために電極活物質層を形成しない領域（非塗工部）が存在する。この非塗工部は、長尺状の電極板又は中間製品であるウエブの薄い部分であり、この様なウエブの薄い部分では、付勢力Ｆと反力ｓ及び付勢力ｆとのバランスが崩れて、付勢力ｆによる歪み矯正力が過大になる。すると、図４に示すように第１ロール１６ａは、プレスロールの軸方向中央が付勢力Ｆの付勢方向に沈み込み、両側が付勢力Ｆの付勢方向の反対方向に浮き上がった形状に歪む。この時、ウエブ１７と第１ロール１６ａは、非塗工部の領域内の一点接触となる。   However, in many cases, the electrode plate has a region (non-coated portion) where an electrode active material layer is not formed for terminal extraction or the like. This non-coated part is a thin part of a long electrode plate or a web that is an intermediate product, and in such a thin part of the web, the balance between the urging force F, the reaction force s, and the urging force f is lost. Thus, the distortion correction force due to the biasing force f becomes excessive. Then, as shown in FIG. 4, the first roll 16 a is distorted into a shape in which the center in the axial direction of the press roll sinks in the urging direction of the urging force F and both sides are lifted in the opposite direction of the urging direction of the urging force F. . At this time, the web 17 and the first roll 16a are in one-point contact within the region of the non-coated portion.

ロール圧延の作業が不測の事態又は所定の理由によって中断される時に、ウエブの薄い部分がプレスロールの直下の位置でプレスロールの回転が停止（ウエブ搬送が停止）する場合がある。その場合、ウエブにテンションをかけた状態でプレスロールの回転を再開すると、図４に示すように、ウエブ１７は接点Ｐで固定されて搬送の前後方向に引っ張られるので、その接点Ｐを基点としてウエブの破断が発生しやすいという問題がある。   When the roll rolling operation is interrupted due to unforeseen circumstances or for a predetermined reason, the rotation of the press roll may stop at a position immediately below the press roll (web conveyance is stopped). In that case, when the rotation of the press roll is resumed with tension applied to the web, as shown in FIG. 4, the web 17 is fixed at the contact point P and pulled in the front-rear direction of conveyance. There is a problem that the web is easily broken.

本発明は、上記の実状に鑑みて成し遂げられたものであり、その目的は、プレス工程においてウエブの破断を生じない、電極板の製造方法及び製造装置を提供することにある。   The present invention has been accomplished in view of the above circumstances, and an object of the present invention is to provide an electrode plate manufacturing method and a manufacturing apparatus that do not cause web breakage in a pressing process.

本発明に係る電極板の製造方法は、電極活物質層が集電体の両面に設けられている電極板中間品を、一対のプレスロール間を通過させて圧延する電極板の製造方法において、当該電極板中間品の少なくとも一部では、一方の面に塗工部が形成されており、他方の面の当該塗工部の直上又は直下となる位置には非塗工部が形成されており、前記電極板中間品の搬送を停止するときに、搬送路上を移動する電極板中間品の両面の塗工部と非塗工部をセンサーで判別し、その判別結果に基づいて少なくとも一面側の非塗工部が前記プレスロールの直下に停止しないように電極板中間品の停止位置を調節することを特徴とする。 In the method for producing an electrode plate according to the present invention, the electrode plate intermediate product in which the electrode active material layers are provided on both surfaces of the current collector is rolled by passing between a pair of press rolls. In at least a part of the electrode plate intermediate product, a coated portion is formed on one surface, and a non-coated portion is formed at a position directly above or directly below the coated portion on the other surface. , when stopping the conveyance of the electrode plate intermediate product, the coated portion and the uncoated portion of the surfaces of the electrode plates an intermediate product for movement of the conveyor path determined by a sensor, at least one side based on the determination result The stop position of the electrode plate intermediate product is adjusted so that the non-coated portion does not stop immediately below the press roll.

また、本発明に係る電極板の製造装置は、電極活物質層が集電体の両面に設けられている電極板中間品であって、当該電極板中間品の少なくとも一部では、一方の面に塗工部が形成されており、他方の面の当該塗工部の直上又は直下となる位置には非塗工部が形成されている電極板中間品を圧延する一対のプレスロール、前記電極板中間品を前記一対のプレスロール間に供給する搬送手段、前記搬送手段により搬送路上を移動する前記電極板中間品の両面の塗工部と非塗工部を判別するセンサー、前記センサーによる判別結果に基づいて少なくとも一面側の非塗工部が前記プレスロールの直下に停止しないように電極板中間品の停止位置を調節する制御手段、を備えることを特徴とする。 The electrode plate manufacturing apparatus according to the present invention is an electrode plate intermediate product in which electrode active material layers are provided on both surfaces of a current collector , and at least a part of the electrode plate intermediate product has one surface. A pair of press rolls for rolling an intermediate product of an electrode plate on which the non-coated portion is formed at a position directly above or directly below the coated portion on the other surface sensor for determining transfer means supplied between the pair of press rolls plate intermediate product, the non-coated portion and the coating portion of both surfaces of the electrode plates an intermediate product for movement of the conveyor path by the conveyor means, determination by the sensor Control means for adjusting the stop position of the electrode plate intermediate product so that at least one non-coated portion on the one surface side does not stop immediately below the press roll based on the result.

本発明によれば、電極板を製造するためのプレス工程において、電極板中間品の搬送を停止する時に、集電体上の塗工部と非塗工部の位置を判別し、その停止位置を調節することによって、非塗工部がプレスロール直下に停止することを回避する。したがって、搬送を再開する時にウエブの一点に荷重が集中せず、ウエブの破断を防止することができ、製造コストが低減されるとともに、製造効率を向上させることができる。   According to the present invention, in the pressing process for manufacturing the electrode plate, when stopping the conveyance of the electrode plate intermediate product, the position of the coated portion and the non-coated portion on the current collector is determined, and the stop position By adjusting, it is avoided that the non-coated part stops immediately below the press roll. Therefore, when the conveyance is resumed, the load is not concentrated on one point of the web, the web can be prevented from being broken, the production cost can be reduced, and the production efficiency can be improved.

本発明に係る電極板の製造方法は、電極活物質層が集電体の少なくとも一面に設けられている電極板中間品を、一対のプレスロール間を通過させて圧延する電極板の製造方法において、前記電極板中間品の搬送を停止するときに、搬送路上を移動する電極板中間品の少なくとも一面側の塗工部と非塗工部をセンサーで判別し、その判別結果に基づいて少なくとも一面側の非塗工部が前記プレスロールの直下に停止しないように電極板中間品の停止位置を調節することを特徴とする。   An electrode plate manufacturing method according to the present invention is an electrode plate manufacturing method in which an electrode plate intermediate product having an electrode active material layer provided on at least one surface of a current collector is rolled by passing between a pair of press rolls. When stopping the conveyance of the electrode plate intermediate product, at least one surface of the electrode plate intermediate product moving on the conveying path is determined by a sensor, and at least one surface is determined based on the determination result. The stop position of the electrode plate intermediate product is adjusted so that the non-coated portion on the side does not stop immediately below the press roll.

また、本発明に係る電極板の製造装置は、電極活物質層が集電体の少なくとも一面に設けられている電極板中間品を圧延する一対のプレスロール、前記電極板中間品を前記一対のプレスロール間に供給する搬送手段、前記搬送手段により搬送路上を移動する前記電極板中間品の少なくとも一面側の塗工部と非塗工部を判別するセンサー、前記センサーによる判別結果に基づいて少なくとも一面側の非塗工部が前記プレスロールの直下に停止しないように電極板中間品の停止位置を調節する制御手段、を備えることを特徴とする。   The electrode plate manufacturing apparatus according to the present invention includes a pair of press rolls for rolling an electrode plate intermediate product in which an electrode active material layer is provided on at least one surface of a current collector, and the electrode plate intermediate product as a pair of the electrode plate intermediate product. Conveying means to be supplied between press rolls, a sensor for discriminating between at least one coated part and non-coating part of the electrode plate intermediate product moving on the conveying path by the conveying means, at least based on the discrimination result by the sensor Control means for adjusting the stop position of the intermediate electrode plate so that the non-coating portion on the one surface side does not stop immediately below the press roll is provided.

図１に本発明の電極板製造装置の一構成例を示し、以下、本発明の実施の態様について、詳細に説明する。   FIG. 1 shows an example of the configuration of an electrode plate manufacturing apparatus according to the present invention. Hereinafter, embodiments of the present invention will be described in detail.

（製造装置の基本構成）
図１に示すロールプレス機（製造装置）１は、次のような構成要素を含んでいる：一対のプレスロール２（２ａ，２ｂ）；該プレスロールを駆動するモータ３ａ；電極板供給ロールを取り付けた電極板供給部４；電極板供給ロールを駆動するモータ３ｂ；電極板巻取りロールを取り付けた電極板巻取り部５；電極板巻取りロールを駆動するモータ３ｃ；搬送路上を移動する電極板中間品６を支持するガイドローラ７；外部から運転の開始、停止又は運転条件等の指示信号を入力する入力手段８；電極板中間品６の塗工部９と非塗工部１０を判別するセンサー１１；停止位置を調節する制御手段１２。 (Basic configuration of manufacturing equipment)
A roll press machine (manufacturing apparatus) 1 shown in FIG. 1 includes the following components: a pair of press rolls 2 (2a, 2b); a motor 3a for driving the press rolls; an electrode plate supply roll. Attached electrode plate supply unit 4; Motor 3b for driving electrode plate supply roll; Electrode plate take-up unit 5 attached with electrode plate take-up roll; Motor 3c for driving electrode plate take-up roll; Electrode moving on transport path Guide roller 7 for supporting the plate intermediate product 6; input means 8 for inputting an instruction signal for starting, stopping or operating conditions from the outside; discriminating between the coating part 9 and the non-coating part 10 of the electrode plate intermediate product 6 A sensor 11 for performing control;

この製造装置１において電極板中間品は、電極板供給ロールから繰り出され、搬送路を移動して一対のプレスロール２ａ，２ｂ間を通過し、その際に圧延され、さらに下流側へ移動して電極板巻取りロールに巻き取られる。   In this manufacturing apparatus 1, the electrode plate intermediate product is fed out from the electrode plate supply roll, moves through the conveyance path, passes between the pair of press rolls 2a and 2b, is rolled at that time, and further moves downstream. It is wound up on an electrode plate winding roll.

（電極板中間品）
本発明における電極板中間品は、電極活物質層が集電体の少なくとも一面に設けられている、製造工程途中の中間製品であり、代表的には細長い連続シート状の電極板中間品である。 (Electrode plate intermediate product)
The electrode plate intermediate product in the present invention is an intermediate product in the course of the manufacturing process in which the electrode active material layer is provided on at least one surface of the current collector, and is typically an electrode plate intermediate product in the form of an elongated continuous sheet. .

本発明により加工される正極用及び負極用の電極板中間品は、以下のようにして作成される。   The positive and negative electrode plate intermediate products processed according to the present invention are prepared as follows.

電極板には非水電解液二次電池用、燃料電池用、二重層キャパシタ用等、様々な形態があるが、一般に、正極板中間品は、少なくとも正極活物質及び結着材を含有する正極用活物質層塗工組成物を集電体の一面側又は両面に塗布して、正極活物質層を形成することによって作製される。一方、負極板中間品は、少なくとも負極活物質及び結着材を含有する負極用活物質層塗工組成物を集電体の一面側又は両面に塗布して、負極活物質層を形成することによって作製される。   There are various types of electrode plates, such as for non-aqueous electrolyte secondary batteries, fuel cells, and double layer capacitors. Generally, an intermediate product of a positive electrode plate is a positive electrode containing at least a positive electrode active material and a binder. The active material layer coating composition is applied to one side or both sides of the current collector to form a positive electrode active material layer. On the other hand, the negative electrode plate intermediate product is formed by applying a negative electrode active material layer coating composition containing at least a negative electrode active material and a binder to one side or both sides of a current collector to form a negative electrode active material layer. It is produced by.

正極活物質としては、従来から非水電解液二次電池用、燃料電池用、二重層キャパシタ等の正極活物質として用いられている材料を用いることができる。例えば、非水電解液二次電池用電極板であれば、ＬｉＭｎ2Ｏ4（マンガン酸リチウム）、ＬｉＣｏＯ2（コバルト酸リチウム）若しくはＬｉＮｉＯ2（ニッケル酸リチウム）等のリチウム酸化物、又はＴｉＳ2、ＭｎＯ2、ＭｏＯ3もしくはＶ2Ｏ5等のカルコゲン化合物を例示することができる。特に、ＬｉＣｏＯ２を正極用活物質として用い、炭素質材料を負極用活物質として用いることにより、４ボルト程度の高い放電電圧を有するリチウム系２次電池が得られる。 As the positive electrode active material, materials conventionally used as positive electrode active materials for non-aqueous electrolyte secondary batteries, fuel cells, double layer capacitors, and the like can be used. For example, in the case of an electrode plate for a non-aqueous electrolyte secondary battery, lithium oxide such as LiMn 2 O 4 (lithium manganate), LiCoO 2 (lithium cobaltate) or LiNiO 2 (lithium nickelate), or TiS 2 And chalcogen compounds such as MnO 2 , MoO 3 or V 2 O 5 . In particular, by using LiCoO 2 as the positive electrode active material and the carbonaceous material as the negative electrode active material, a lithium secondary battery having a high discharge voltage of about 4 volts can be obtained.

正極活物質は、塗工層中に均一に分散させるために、例えば、非水電解液二次電池用電極板であれば、１〜１００μｍの範囲の粒径を有し、且つ平均粒径が約10μｍの粉体であることが好ましい。これらの正極用活物質は単独で用いてもよいし、２種以上を組み合わせて用いてもよい。   In order to uniformly disperse the positive electrode active material in the coating layer, for example, in the case of an electrode plate for a non-aqueous electrolyte secondary battery, the positive electrode active material has a particle size in the range of 1 to 100 μm and an average particle size. A powder of about 10 μm is preferred. These positive electrode active materials may be used alone or in combination of two or more.

一方、負極活物質としては、従来から非水電解液二次電池用、燃料電池用、二重層キャパシタ等の負極活物質として用いられている材料を用いることができる。例えば、非水電解液二次電池用電極板であれば、天然グラファイト、人造グラファイト、アモルファス炭素、カーボンブラック、又は、これらの成分に異種元素を添加したもののような炭素質材料が好んで用いられる。溶媒が有機系の場合には金属リチウム又はリチウム合金のようなリチウム含有金属が好適に用いられる。   On the other hand, as the negative electrode active material, materials conventionally used as negative electrode active materials for non-aqueous electrolyte secondary batteries, fuel cells, double layer capacitors and the like can be used. For example, in the case of an electrode plate for a nonaqueous electrolyte secondary battery, a carbonaceous material such as natural graphite, artificial graphite, amorphous carbon, carbon black, or a material obtained by adding a different element to these components is preferably used. . When the solvent is organic, a lithium-containing metal such as lithium metal or a lithium alloy is preferably used.

負極活物質の粒子形状は特に限定されないが、例えば、鱗片状、塊状、繊維状、球状のものが使用可能である。負極活物質は、塗工層中に均一に分散させるために、例えば、非水電解液二次電池用電極板であれば、１〜１００μｍの範囲の粒径を有し、且つ平均粒径が約10μｍの粉体であることが好ましい。これらの負極用活物質は単独で用いてもよいし、２種以上を組み合わせて用いてもよい。   Although the particle shape of a negative electrode active material is not specifically limited, For example, a flaky shape, a lump shape, a fiber shape, and a spherical shape can be used. In order to uniformly disperse the negative electrode active material in the coating layer, for example, in the case of an electrode plate for a non-aqueous electrolyte secondary battery, the negative electrode active material has a particle size in the range of 1 to 100 μm and an average particle size. A powder of about 10 μm is preferred. These negative electrode active materials may be used alone or in combination of two or more.

電極活物質層用塗工組成物中の正極又は負極活物質の配合割合は、例えば、非水電解液二次電池用電極板であれば、溶剤を除く配合成分を基準（固形分基準）とした時に通常、９０〜９８．５重量％とするが、特に高容量化を図る点からは、９５．２〜９６．６重量％であることが好ましい。   The proportion of the positive electrode or negative electrode active material in the electrode active material layer coating composition is, for example, an electrode plate for a non-aqueous electrolyte secondary battery, based on the components (solid content basis) excluding the solvent. However, it is preferably 95.2 to 96.6% by weight from the viewpoint of increasing the capacity.

結着材としては、従来から用いられているもの、例えば、非水電解液二次電池用電極板であれば、熱可塑性樹脂、より具体的にはポリエステル樹脂、ポリアミド樹脂、ポリアクリル酸エステル樹脂、ポリカーボネート樹脂、ポリウレタン樹脂、セルロース樹脂、ポリオレフィン樹脂、ポリビニル樹脂、フッ素系樹脂又はポリイミド樹脂等を使用することができる。この際、反応性官能基を導入したアクリレートモノマー又はオリゴマーを結着材中に混入させることも可能である。そのほかにも、ゴム系の樹脂や、アクリル樹脂、ウレタン樹脂等の熱硬化性樹脂、アクリレートモノマー、アクリレートオリゴマー或いはそれらの混合物からなる電離放射線硬化性樹脂、上記各種の樹脂の混合物を使用することもできる。   As a binder, if it is conventionally used, for example, an electrode plate for a non-aqueous electrolyte secondary battery, a thermoplastic resin, more specifically, a polyester resin, a polyamide resin, a polyacrylate resin Polycarbonate resin, polyurethane resin, cellulose resin, polyolefin resin, polyvinyl resin, fluorine-based resin, polyimide resin, or the like can be used. At this time, an acrylate monomer or oligomer into which a reactive functional group is introduced can be mixed in the binder. In addition, rubber-based resins, thermosetting resins such as acrylic resins and urethane resins, ionizing radiation curable resins composed of acrylate monomers, acrylate oligomers or mixtures thereof, and mixtures of the above various resins may be used. it can.

電極活物質層用塗工組成物中の結着材の配合割合は、例えば、非水電解液二次電池用電極板であれば、固形分基準で通常、０．５〜１０重量％、好ましくは２〜４重量％とするが、高容量化を図る点からは、１．６〜２．０重量％が好ましい。   The blending ratio of the binder in the coating composition for the electrode active material layer is, for example, 0.5 to 10% by weight, preferably on the basis of solid content, if it is an electrode plate for a non-aqueous electrolyte secondary battery. Is 2 to 4% by weight, but 1.6 to 2.0% by weight is preferable from the viewpoint of increasing the capacity.

正極又は負極用活物質層塗工組成物には、導電剤を添加しても良い。導電剤としては、例えば、非水電解液二次電池用電極板であれば、グラファイト、カーボンブラック又はアセチレンブラック等の炭素質材料が必要に応じて用いられる。塗工組成物中の導電剤の配合割合は、例えば、非水電解液二次電池用電極板であれば、通常、固形分基準で、１．５〜２．０重量％とする。   A conductive agent may be added to the positive electrode or negative electrode active material layer coating composition. As the conductive agent, for example, in the case of an electrode plate for a non-aqueous electrolyte secondary battery, a carbonaceous material such as graphite, carbon black, or acetylene black is used as necessary. For example, in the case of an electrode plate for a non-aqueous electrolyte secondary battery, the blending ratio of the conductive agent in the coating composition is usually 1.5 to 2.0% by weight based on the solid content.

正極又は負極用活物質層塗工組成物を調製する溶剤としては、例えば、非水電解液二次電池用電極板であれば、トルエン、メチルエチルケトン、Ｎ−メチル−２−ピロリドン或いはこれらの混合物のような有機溶剤を用いることができる。塗工組成物中の溶剤の割合は、例えば、非水電解液二次電池用電極板であれば、通常、３０〜６０重量％、好ましくは４５〜５５重量％とし、塗工液をスラリー状に調製する。   As a solvent for preparing the active material layer coating composition for the positive electrode or the negative electrode, for example, in the case of an electrode plate for a non-aqueous electrolyte secondary battery, toluene, methyl ethyl ketone, N-methyl-2-pyrrolidone or a mixture thereof Such an organic solvent can be used. If the ratio of the solvent in the coating composition is, for example, an electrode plate for a non-aqueous electrolyte secondary battery, it is usually 30 to 60% by weight, preferably 45 to 55% by weight. Prepare to.

正極又は負極活物質層用塗工組成物は、適宜選択した正極又は負極活物質、結着材、及び他の配合成分を適切な溶剤中にいれ、ホモジナイザー、ボールミル、サンドミル、ロールミル又はプラネタリーミキサー等の分散機により混合分散して、スラリー状に調製できる。   The coating composition for the positive electrode or negative electrode active material layer is prepared by placing an appropriately selected positive electrode or negative electrode active material, binder, and other compounding components in an appropriate solvent, and a homogenizer, ball mill, sand mill, roll mill or planetary mixer. It can be mixed and dispersed by a dispersing machine such as a slurry to prepare a slurry.

このようにして調製された正極又は負極活物質層用塗工組成物を、基体である集電体の一面又は両面に塗布、乾燥して正極又は負極活物質層を形成する。正極板の集電体としては、例えば、非水電解液二次電池用電極板であれば、通常、アルミニウム箔が好ましく用いられる。一方、負極板の集電体としては、例えば、非水電解液二次電池用電極板であれば、電解銅箔や圧延銅箔等の銅箔が好ましく用いられる。集電体の厚さは、例えば、非水電解液二次電池用電極板であれば、通常、５〜５０μｍ程度とする。   The positive electrode or negative electrode active material layer coating composition thus prepared is applied to one or both surfaces of the current collector as the substrate and dried to form a positive electrode or negative electrode active material layer. As the current collector of the positive electrode plate, for example, an aluminum foil is usually preferably used as long as it is an electrode plate for a non-aqueous electrolyte secondary battery. On the other hand, as the current collector of the negative electrode plate, for example, a copper foil such as an electrolytic copper foil or a rolled copper foil is preferably used in the case of an electrode plate for a non-aqueous electrolyte secondary battery. The thickness of the current collector is usually about 5 to 50 μm, for example, in the case of an electrode plate for a non-aqueous electrolyte secondary battery.

正極又は負極活物質層用塗工組成物の塗布方法は、特に限定されないが、例えばスライドダイコート、コンマダイレクトコート、コンマリバースコート等のように、厚い塗工層を形成できる方法が適している。ただし、活物質層に求められる厚さが比較的薄い場合には、グラビアコートやグラビアリバースコート等により塗布してもよい。活物質層は、複数回塗布、乾燥を繰り返すことにより形成してもよい。   A method for applying the coating composition for the positive electrode or the negative electrode active material layer is not particularly limited, but a method capable of forming a thick coating layer such as a slide die coat, a comma direct coat, a comma reverse coat, and the like is suitable. However, when the thickness required for the active material layer is relatively thin, it may be applied by gravure coating or gravure reverse coating. The active material layer may be formed by repeating application and drying a plurality of times.

集電体上に、電極活物質層を設けた塗工部と、端子取り付け等の目的に利用される非塗工部を間欠的なパターン状に形成するには、例えば、ダイヘッドを機械的に制御しながら電極活物質層用塗工組成物を集電体上に塗工して塗工部と非塗工部のパターンを直接形成する。具体的には、塗工部又は非塗工部のパターンに合わせてダイヘッド及び／又は集電体を動かしながらダイヘッドからの電極活物質層用塗工組成物の吐出開始と吐出停止を繰り返したり、ダイヘッドの離脱と再接近を、電極活物質層用塗工組成物の吐出停止とその再開にそれぞれ同調させて繰り返せばよい。   In order to form a coated part provided with an electrode active material layer on a current collector and a non-coated part used for the purpose of terminal attachment in an intermittent pattern, for example, a die head is mechanically The electrode active material layer coating composition is coated on the current collector while being controlled to directly form the pattern of the coated part and the non-coated part. Specifically, repeating the discharge start and discharge stop of the coating composition for the electrode active material layer from the die head while moving the die head and / or current collector according to the pattern of the coated part or non-coated part, The separation and re-approaching of the die head may be repeated in synchronism with stopping and restarting the discharge of the electrode active material layer coating composition.

乾燥工程における熱源としては、熱風、赤外線、マイクロ波、高周波、或いはそれらを組み合わせて利用できる。乾燥工程において集電体をサポート又はプレスする金属ローラーや金属シートを加熱して放出させた熱によって乾燥してもよい。また、乾燥後、電子線又は放射線を照射することにより、結着材を架橋反応させて活物質層を得ることもできる。塗布と乾燥は、複数回繰り返してもよい。   As a heat source in the drying process, hot air, infrared rays, microwaves, high frequencies, or a combination thereof can be used. You may dry with the heat which discharge | released the metal roller and metal sheet which support or press a collector in a drying process. Moreover, an active material layer can also be obtained by carrying out the crosslinking reaction of a binder by irradiating an electron beam or a radiation after drying. Application and drying may be repeated a plurality of times.

このようにして得られる電極活物質層は、少なくとも正極又は負極活物質及び結着材を含有し、さらに必要に応じて導電剤やその他の成分を含有してなるものであり、乾燥後の活物質層に含有される各成分の配合割合は、電極活物質層用塗工組成物の固形分基準での配合割合と同じである。正極又は負極活物質層の塗工量は通常、２０〜３５０ｇ／ｍ２とし、その厚さは、乾燥、プレス後に通常１０〜２００μｍ、好ましくは５０〜１７０μｍの範囲にする。 The electrode active material layer thus obtained contains at least a positive electrode or negative electrode active material and a binder, and further contains a conductive agent and other components as necessary. The blending ratio of each component contained in the material layer is the same as the blending ratio on the basis of the solid content of the electrode active material layer coating composition. The coating amount of the positive electrode or negative electrode active material layer is usually 20 to 350 g / m 2 , and the thickness is usually 10 to 200 μm, preferably 50 to 170 μm after drying and pressing.

（プレスロール）
図１の例では、一対のプレスロール２と、該プレスロールを駆動するモータ３ａと、必要に応じてその他の部材からプレス手段が構成される。電極板中間品６は、少なくとも一対のプレスロール２ａ，２ｂ間を通過する際に圧延され、これにより、電極活物質層の密度、集電体に対する密着性、均質性を向上させることができる。 (Press roll)
In the example of FIG. 1, a press means is comprised from a pair of press roll 2, the motor 3a which drives this press roll, and another member as needed. The electrode plate intermediate product 6 is rolled when passing between at least the pair of press rolls 2a and 2b, and thereby the density of the electrode active material layer, the adhesion to the current collector, and the homogeneity can be improved.

本発明におけるプレスロールとしては、金属製のもの同士又は硬質プラスチック製のもの同士を対にして、あるいは金属製のロールと硬質プラスチック製のロールとを組み合わせて使用することができる。プレスロールの直径は、導電性基材の材質、厚さなどにより適宜決定される。プレスロールの配置段数は図に示したような１段でも良いが、複数対のロールを多段に配置しても良い。また、多段ロールでは、通常ロールニップを直列に配置する方法が採られるが、複数対のロールを１列に配置し、これらのロール間を千鳥状に通す方法も採ることができる。さらに、このような多段ロールにおいては、各ロールの直径は同じでも良いし異なっていても良い。   As a press roll in this invention, it can be used combining metal things or hard plastic things, or combining a metal roll and a hard plastic roll. The diameter of the press roll is appropriately determined depending on the material and thickness of the conductive substrate. The number of press rolls arranged may be one as shown in the figure, but a plurality of pairs of rolls may be arranged in multiple stages. In a multi-stage roll, a method in which roll nips are normally arranged in series is adopted, but a method in which a plurality of pairs of rolls are arranged in a row and these rolls are passed in a staggered manner can also be adopted. Furthermore, in such a multistage roll, the diameter of each roll may be the same or different.

プレスを行う際には定位プレス、定圧プレスいずれを行っても良い。加圧の際の圧力は、線圧で１００〜７００ｋｇ／ｃｍとすることが好ましく、特に好ましい圧力は、２００〜５５０ｋｇ／ｃｍである。プレス圧力が小さすぎると電極活物質層の均質性が得られにくく、プレス圧力が大きすぎると電極板の機械的損傷が生じやすい。従って、電極活物質層を圧延する一対のプレスロールの間隙は、集電体厚さ以上、且つ、集電体厚さと電極活物質層厚さとの和よりも小さい距離に調節することが好ましい。つまり、集電体厚さより小さい間隙にすると集電体を含めて電極板自体が破損してしまう恐れがあり好ましくなく、また集電体厚さと電極活物質層厚さとの和よりも大きな間隙にするとプレスにむらが生じるか、あるいはプレス不充分となるので好ましくない。電極活物質層は、一回のプレスで所定の厚さにしてもよく、均質性を向上させる目的で数回に分けてプレスしてもよい。また、ロールの温度は、特に限定されるものではなく、室温から２００℃までの温度に加温して使用される。   When performing the pressing, either a stereotaxic press or a constant pressure press may be performed. The pressure at the time of pressurization is preferably 100 to 700 kg / cm in terms of linear pressure, and particularly preferably 200 to 550 kg / cm. If the pressing pressure is too low, it is difficult to obtain the homogeneity of the electrode active material layer, and if the pressing pressure is too high, mechanical damage to the electrode plate is likely to occur. Therefore, the gap between the pair of press rolls for rolling the electrode active material layer is preferably adjusted to a distance that is greater than the current collector thickness and smaller than the sum of the current collector thickness and the electrode active material layer thickness. In other words, if the gap is smaller than the current collector thickness, the electrode plate itself including the current collector may be damaged, which is not preferable, and the gap is larger than the sum of the current collector thickness and the electrode active material layer thickness. Then, unevenness in the press occurs or the press becomes insufficient, which is not preferable. The electrode active material layer may have a predetermined thickness by a single press, or may be pressed several times for the purpose of improving homogeneity. Moreover, the temperature of a roll is not specifically limited, It heats and uses it to the temperature from room temperature to 200 degreeC.

また、本発明においては、ロール圧延の作業が不測の事態又は所定の理由によって中断される時でも、ウエブの薄い部分がプレスロール直下の位置でプレスロールの回転が停止（ウエブ搬送が停止）しないよう、センサー、制御手段等によって回避するため、本発明の電極板中間品は、図３に示すように、プレスを充分に行うための第１ロール１６ａへの付勢力Ｆとウエブ１７からの反力ｓ及び矯正のための付勢力ｆとのバランスがとれている状態になる。従って、第１ロール１６ａは歪まず、搬送を再開する時にウエブ１７の一点に荷重が集中することもなく、プレス工程を支障なく行うことができる。   Further, in the present invention, even when the roll rolling operation is interrupted due to unforeseen circumstances or for a predetermined reason, the rotation of the press roll does not stop at the position immediately below the press roll (web conveyance does not stop). As shown in FIG. 3, the intermediate product of the electrode plate according to the present invention has a biasing force F applied to the first roll 16a and a reaction from the web 17 to sufficiently perform pressing. The force s and the biasing force f for correction are balanced. Therefore, the first roll 16a is not distorted, and the load is not concentrated on one point of the web 17 when the conveyance is resumed, and the pressing process can be performed without any trouble.

（搬送手段）
搬送手段は、電極板中間品を一対のプレスロール間に供給するための手段である。図１の例では、電極板供給ロールを取り付けた電極板供給部４と、該電極板供給部を駆動するモータ３ｂと、電極板巻取りロールを取り付けた電極板巻取り部５と、該電極板巻取り部５を駆動するモータ３ｃと、搬送路上を移動する電極板中間品６を支持するガイドローラ７と、必要に応じてその他の部材から搬送手段が構成される。搬送速度は通常、５〜５０ｍ／ｍｉｎ．とする。 (Conveying means)
A conveyance means is a means for supplying an electrode plate intermediate product between a pair of press rolls. In the example of FIG. 1, an electrode plate supply unit 4 to which an electrode plate supply roll is attached, a motor 3 b that drives the electrode plate supply unit, an electrode plate take-up unit 5 to which an electrode plate take-up roll is attached, and the electrode The motor 3c that drives the plate winding unit 5, the guide roller 7 that supports the electrode plate intermediate product 6 that moves on the conveyance path, and other members as necessary constitute conveyance means. The conveyance speed is usually 5 to 50 m / min. And

（入力手段）
入力手段は、ロールプレス機１を運転するために必要な開始、停止又は運転条件等の指示を入力して信号化（指示信号の作成）し、指示信号を制御手段に伝達する手段である。入力手段は、例えば、指示を入力するためのインターフェイス部と、入力した情報を信号化する変換部と、生成した指示信号を制御手段に送る送信部から構成され、さらに必要に応じて、自動運転のために信号を蓄積し、蓄積された信号の一部を適切な時刻に発信するプログラム記録部等の他の部材を含んでいても良い。 (Input means)
The input means is means for inputting an instruction such as start, stop, or operation condition necessary for operating the roll press machine 1 to generate a signal (creating an instruction signal) and transmitting the instruction signal to the control means. The input means includes, for example, an interface unit for inputting an instruction, a conversion unit that converts the input information into a signal, and a transmission unit that sends the generated instruction signal to the control unit. For this purpose, other members such as a program recording unit for accumulating signals and transmitting a part of the accumulated signals at an appropriate time may be included.

（センサー）
本発明において用いられるセンサーは、搬送路上を移動する電極板中間品上の塗工部と非塗工部の形成位置を判別し、判別結果を制御手段に伝達する。 (sensor)
The sensor used in the present invention discriminates the formation positions of the coating part and the non-coating part on the electrode plate intermediate product moving on the conveyance path, and transmits the discrimination result to the control means.

本発明に用いるセンサーは、超音波やレーザー等を使った一般的な手法を用いることができる。   For the sensor used in the present invention, a general method using ultrasonic waves, lasers, or the like can be used.

図１に示すように、センサー１１を設置する位置としては、通常、プレスロールよりも搬送路の上流側とする。但し、電極活物質層組成物が集電体上に規則的に間欠塗布されている場合、上流側の非塗工部の位置を特定することにより、下流側の非塗工部の位置も特定できるため、プレスロールよりも下流側の搬送路上にセンサーを設置してもよい。   As shown in FIG. 1, the position where the sensor 11 is installed is usually on the upstream side of the conveyance path from the press roll. However, when the electrode active material layer composition is regularly and intermittently applied on the current collector, the position of the non-coated part on the downstream side is also specified by specifying the position of the non-coated part on the upstream side. Therefore, a sensor may be installed on the conveyance path downstream of the press roll.

また、本発明においては、搬送路上を移動する電極板中間品の少なくとも一面側の塗工部と非塗工部の形成位置をセンサーで判別し、必要に応じて両面ともセンサーにより判別するが、集電体の一面側に間欠塗布された電極活物質層と他面側に間欠塗布された電極活物質層の位置関係に規則性がある場合には、片面側だけセンサーで判別し、他面側の塗工部と非塗工部の形成位置は、反対面側のセンサー判別結果に基づいて特定し、電極板中間体の両面とも塗工部である位置がプレスロール直下に止まるように制御してもよい。   In the present invention, the sensor determines the formation position of the coated part and the non-coated part on at least one side of the electrode plate intermediate product that moves on the transport path, and both sides are also determined by the sensor if necessary. If there is regularity in the positional relationship between the electrode active material layer intermittently applied to one side of the current collector and the electrode active material layer intermittently applied to the other side, the sensor determines only one side and the other side The formation position of the coated part and the non-coated part on the side is specified based on the sensor discrimination result on the opposite side, and control is performed so that the position of the coated part on both sides of the electrode plate intermediate stops just below the press roll May be.

（制御手段）
制御手段は、センサーによる判別結果に基づいて電極板中間品の少なくとも一面側の非塗工部がプレスロール直下で停止しないように停止位置を調節するための手段である。制御手段は、停止時の制御だけでなく、停止時以外の運転過程を制御できるものであっても良い。制御手段は、例えば、制御プログラムを蓄積するプログラム部、入力手段からの指示信号や各種センサーからのフィードバック情報を制御プログラムに照合して運転条件の適否判定又は最適条件の決定を行う演算部、制御信号を各駆動手段に送る発信部、及び、必要に応じてその他の部材から構成される。 (Control means)
The control means is a means for adjusting the stop position so that the non-coated portion on at least one surface side of the electrode plate intermediate product does not stop immediately below the press roll based on the determination result by the sensor. The control means may be capable of controlling not only the control at the time of stop but also the operation process other than at the time of stop. The control means includes, for example, a program section for accumulating a control program, a calculation section for checking the suitability of the operating conditions or determining the optimum conditions by collating the instruction signal from the input means and feedback information from various sensors with the control program, It is comprised from the transmission part which sends a signal to each drive means, and another member as needed.

図１の例では、制御手段は前記入力手段８、電極板中間品６のセンサー１１、図示されていないその他のセンサー、及び、３つのモータ３ａ、ｂ及びｃに接続され、入力手段から受信する指示信号、制御手段内に予め記録された制御プログラム、各種センサーからのフィードバック情報を総合的に判断して、電極板供給ロール（電極板供給部４）と電極板巻取りロール（電極板巻取り部５）と一対のプレスロール２の駆動を協調させ、運転の開始から停止まで全過程の制御を行う。   In the example of FIG. 1, the control means is connected to the input means 8, the sensor 11 of the electrode plate intermediate product 6, other sensors not shown, and the three motors 3a, 3b, and 3c, and receives from the input means. The electrode plate supply roll (electrode plate supply unit 4) and the electrode plate winding roll (electrode plate winding) are judged comprehensively based on the instruction signal, the control program recorded in advance in the control means, and feedback information from various sensors. Part 5) and the drive of the pair of press rolls 2 are coordinated, and the entire process is controlled from the start to the stop of the operation.

本発明において、電極板中間品の搬送を停止するときの停止位置の調節は、例えば、次にように行うことができる。   In the present invention, the adjustment of the stop position when stopping the conveyance of the electrode plate intermediate product can be performed as follows, for example.

先ず、ロール圧延の作業が不測の事態又は所定の理由により中断されるときには、停止の指示信号が生成され、これを制御手段が検知する。停止の指示信号は、入力手段８への個別入力又は入力手段８内の指示プログラムからの自動発信により、入力手段８から制御手段１２に送られるものであってもよいし、又は、制御手段１２内の制御プログラムによって所定時刻に又は運転状況に関し制御手段１２にフィードバックされた情報に基づいて適時に、制御手段１２内に生成されるものであってもよい。   First, when the roll rolling operation is interrupted due to an unexpected situation or for a predetermined reason, a stop instruction signal is generated, which is detected by the control means. The stop instruction signal may be sent from the input means 8 to the control means 12 by individual input to the input means 8 or automatic transmission from the instruction program in the input means 8, or the control means 12 It may be generated in the control means 12 at a predetermined time by the control program in the system or on the basis of information fed back to the control means 12 regarding the driving situation.

次に、停止の指示信号を検知した制御手段１２は、電極板中間品６の少なくとも一面側の塗工部９と非塗工部１０の位置を判別するセンサー１１の出力信号に基づき、停止指示から実際に停止するまでの設定された時間、センサー１１からプレスロール２までの距離、搬送速度等を考慮して、停止位置を予想し、少なくとも一面側の非塗工部１０のプレスロール直下の停止を回避すべく、停止位置は予想通り無変更でよいか、又は、停止位置の短縮又は延長といった変更が必要かを判定し、電極板中間品６の停止位置を調節する。   Next, the control means 12 that has detected the stop instruction signal, based on the output signal of the sensor 11 that determines the position of the coating part 9 and the non-coating part 10 on at least one side of the electrode plate intermediate product 6, The stop position is predicted in consideration of the set time from the sensor 11 to the actual stop, the distance from the sensor 11 to the press roll 2, the transport speed, etc., and at least immediately below the press roll of the non-coated portion 10 on one side. In order to avoid the stop, it is determined whether the stop position may be unchanged as expected or a change such as shortening or extending the stop position is necessary, and the stop position of the electrode plate intermediate product 6 is adjusted.

図２に本発明のオペレーションダイヤグラムを示す。例えば、停止指示から原則として３秒後に止まる設定とした場合、停止の指示信号が制御手段１２に伝達されると、センサー１１が搬送路上のプレスロール２と一定の位置関係にある地点にて塗工部９と非塗工部１０を判別する。その判別結果が制御手段１２に速やかに伝達され、制御手段１２はセンサー１１からプレスロール２までの距離、搬送速度等から３秒後の停止位置を予想し、少なくとも一面側の非塗工部１０がプレスロール２の直下に停止しないように電極板中間品６の停止位置の回避の判定を行う。この判定の結果、プレスロール直下には塗工部９が停止すると予想される場合には、変更不要であり、そのまま予定通り３秒後に停止する。しかし、電極板中間品６の両面とも非塗工部１０の位置がプレスロールの直下に停止すると予想された場合は、搬送速度又は停止までの所用時間等を調節し、停止位置までの距離の短縮又は延長といった変更を行い、必要に応じて、一旦変更した後の停止位置をさらに予想して、変更を１回又はそれ以上繰り返し、最終的に両面とも非塗工部の位置がプレスロール直下に停止することを回避する。   FIG. 2 shows an operation diagram of the present invention. For example, when the stop instruction signal is transmitted to the control means 12 in principle when the stop instruction signal is set to stop after 3 seconds from the stop instruction, the sensor 11 is applied at a point in a certain positional relationship with the press roll 2 on the conveyance path. The construction part 9 and the non-coating part 10 are discriminated. The determination result is promptly transmitted to the control means 12, and the control means 12 predicts a stop position after 3 seconds from the distance from the sensor 11 to the press roll 2, the conveyance speed, and the like, and at least the non-coated part 10 on the one side. Is determined to avoid the stop position of the intermediate electrode plate product 6 so as not to stop immediately below the press roll 2. As a result of this determination, if it is predicted that the coating unit 9 stops immediately below the press roll, no change is necessary, and it stops as it is after 3 seconds as planned. However, if it is expected that the position of the non-coated portion 10 on both sides of the electrode plate intermediate product 6 is stopped immediately below the press roll, the conveyance speed or the time required until the stop is adjusted, and the distance to the stop position is adjusted. Make a change such as shortening or extending, and if necessary, further predict the stop position after the change, repeat the change once or more, and finally the position of the uncoated part on both sides is directly under the press roll Avoid stopping at.

本発明によれば、集電体の少なくともどちらか一方の面が塗工部である位置をプレスロール直下に停止させればロール歪みの影響を軽減できる。停止位置の調節は、ロール歪みの影響をどの程度まで防止すべきかによって、より厳しい条件設定をしても良く、例えば、集電体の特定の一面側が塗工部である位置（さらなる条件として、他面側が必ず非塗工部であるという条件設定、或いは、他面側が塗工部、非塗工部いずれであってもよいという条件設定も可能である）がプレスロール直下に停止するようにしても良い。さらに、集電体の両面とも塗工部である位置がプレスロール直下に停止するようにすることが最も好ましい。   According to the present invention, the influence of roll distortion can be reduced if the position where at least one surface of the current collector is the coating portion is stopped immediately below the press roll. The adjustment of the stop position may be set more severe conditions depending on how much the influence of roll distortion should be prevented, for example, the position where the specific one side of the current collector is the coating part (as further conditions, It is possible to set the condition that the other side is always a non-coated part, or the condition that the other side can be either a coated part or a non-coated part). May be. Further, it is most preferable that the positions where the both surfaces of the current collector are the coating portions stop immediately below the press roll.

上記のような、電極板の製造方法及び製造装置を用いることで、搬送停止以前に、塗工部と非塗工部の位置を判別し、その判別結果を制御手段に伝達し、電極板中間品とプレスロールとが一点で接触した状態で停止しないよう制御手段で搬送中の電極板中間品の停止位置を調節することができる。したがって、搬送を再開する時にウエブ上の一点に荷重が集中せず、ウエブの破断を防止することができ、製造コストが低減されるとともに、製造効率を向上させることができる。   By using the electrode plate manufacturing method and manufacturing apparatus as described above, the positions of the coating part and the non-coating part are determined before the conveyance is stopped, and the determination result is transmitted to the control means. The stop position of the intermediate product of the electrode plate being conveyed can be adjusted by the control means so that the product and the press roll do not stop at a single point of contact. Therefore, when the conveyance is resumed, the load is not concentrated on one point on the web, the web can be prevented from being broken, the production cost can be reduced, and the production efficiency can be improved.

本発明における、電極板製造装置の一例を示す説明図である。It is explanatory drawing which shows an example of the electrode plate manufacturing apparatus in this invention. 本発明における、オペレーションダイヤグラムを示す図である。It is a figure which shows the operation diagram in this invention. 従来技術における、プレスロールを示す説明図である。It is explanatory drawing which shows the press roll in a prior art. 従来技術における、プレスロールを示す説明図である。It is explanatory drawing which shows the press roll in a prior art.

符号の説明Explanation of symbols

１ ロールプレス機
２（２ａ，２ｂ） プレスロール
３ａ モータ
３ｂ モータ
３ｃ モータ
４ 電極板供給部
５ 電極板巻取り部
６ 電極板中間品
７ ガイドローラ
８ 入力手段
９ 塗工部
１０ 非塗工部
１１ センサー
１２ 制御手段
１３ 電極活物質層
１４ 集電体
１５ 搬送方向
１６ａ 第１ロール
１６ｂ 第２ロール
１７ ウエブ
Ｆ 付勢力
ｆ 付勢力
ｓ 反力
Ｐ 接点
DESCRIPTION OF SYMBOLS 1 Roll press machine 2 (2a, 2b) Press roll 3a Motor 3b Motor 3c Motor 4 Electrode plate supply part 5 Electrode plate winding part 6 Electrode plate intermediate product 7 Guide roller 8 Input means 9 Coating part 10 Non-coating part 11 Sensor 12 Control means 13 Electrode active material layer 14 Current collector 15 Transport direction 16a 1st roll 16b 2nd roll 17 Web F urging force f urging force s reaction force P contact

Claims (2)

電極活物質層が集電体の両面に設けられている電極板中間品を、一対のプレスロール間を通過させて圧延する電極板の製造方法において、当該電極板中間品の少なくとも一部では、一方の面に塗工部が形成されており、他方の面の当該塗工部の直上又は直下となる位置には非塗工部が形成されており、前記電極板中間品の搬送を停止するときに、搬送路上を移動する電極板中間品の両面の塗工部と非塗工部をセンサーで判別し、その判別結果に基づいて少なくとも一面側の非塗工部が前記プレスロールの直下に停止しないように電極板中間品の停止位置を調節することを特徴とする、電極板の製造方法。
In an electrode plate manufacturing method in which an electrode plate intermediate product having electrode active material layers provided on both sides of a current collector is rolled by passing between a pair of press rolls , at least a part of the electrode plate intermediate product, A coated portion is formed on one surface, and a non-coated portion is formed at a position directly above or directly below the coated portion on the other surface, and the conveyance of the intermediate electrode plate is stopped. Sometimes, the sensor detects the both coated and non-coated parts of the intermediate electrode plate moving on the transport path, and at least one non-coated part is directly under the press roll based on the determination result. A method of manufacturing an electrode plate, wherein the stop position of the intermediate electrode plate is adjusted so as not to stop.
電極活物質層が集電体の両面に設けられている電極板中間品であって、当該電極板中間品の少なくとも一部では、一方の面に塗工部が形成されており、他方の面の当該塗工部の直上又は直下となる位置には非塗工部が形成されている電極板中間品を圧延する一対のプレスロール、前記電極板中間品を前記一対のプレスロール間に供給する搬送手段、前記搬送手段により搬送路上を移動する前記電極板中間品の両面の塗工部と非塗工部を判別するセンサー、前記センサーによる判別結果に基づいて少なくとも一面側の非塗工部が前記プレスロールの直下に停止しないように電極板中間品の停止位置を調節する制御手段、を備えることを特徴とする、電極板の製造装置。 An electrode plate intermediate product in which an electrode active material layer is provided on both sides of the current collector , and at least a part of the electrode plate intermediate product has a coating portion formed on one surface and the other surface A pair of press rolls for rolling an electrode plate intermediate product in which a non-coating portion is formed at a position directly above or directly below the coating portion, and supplying the electrode plate intermediate product between the pair of press rolls conveying means, sensor for determining the non-coated portion and the coating portion of both surfaces of the electrode plates an intermediate product for movement of the conveyor path by the conveyor means, the non-coated portion of at least one side based on the determination result by the sensor An apparatus for manufacturing an electrode plate, comprising: control means for adjusting a stop position of the intermediate electrode plate so as not to stop immediately below the press roll.
JP2004289290A 2004-09-30 2004-09-30 Electrode plate manufacturing method and manufacturing apparatus Expired - Fee Related JP4565953B2 (en)

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