JP2003308835A - Method of cutting electrode plate - Google Patents

Method of cutting electrode plate

Info

Publication number
JP2003308835A
JP2003308835A JP2002114141A JP2002114141A JP2003308835A JP 2003308835 A JP2003308835 A JP 2003308835A JP 2002114141 A JP2002114141 A JP 2002114141A JP 2002114141 A JP2002114141 A JP 2002114141A JP 2003308835 A JP2003308835 A JP 2003308835A
Authority
JP
Japan
Prior art keywords
electrode plate
roll
cutting
blades
negative electrode
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.)
Pending
Application number
JP2002114141A
Other languages
Japanese (ja)
Inventor
Koji Higashimoto
晃二 東本
Tomohiro Iguchi
智博 井口
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Resonac Corp
Original Assignee
Shin Kobe Electric Machinery Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shin Kobe Electric Machinery Co Ltd filed Critical Shin Kobe Electric Machinery Co Ltd
Priority to JP2002114141A priority Critical patent/JP2003308835A/en
Publication of JP2003308835A publication Critical patent/JP2003308835A/en
Pending legal-status Critical Current

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

  • Secondary Cells (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of cutting an electrode plate to suppress a voltage drop of a lithium secondary battery caused by micro short circuit. <P>SOLUTION: Slurry made by mixing lithium manganate powder, carbon powder and PVDF is applied on aluminum foil and it is dried to obtain a roll- shaped positive electrode plate. Slurry made by mixing amorphous carbon and PVDF is applied on copper foil and it is dried to obtain a roll-shaped negative electrode plate. The roll-shaped positive and negative electrode plates are cut to make a battery. A cutting device 10 has blades 1, 1' fixed to rotation shafts 6, 6'. Scrapers 2, 2' of high density polypropylene to remove metal powder adhering to the blades 1, 1' are disposed face to face with the blades 1, 1'. The scrapers 2, 2' have wedgy cross sections at their tip part sides. The tip parts of the scrapers 2, 2 are pressed onto the blades 1, 1' by biasing force of a spring. Dendrite deposition of a metal ion from a negative electrode which is caused by mixture of metal powder is suppressed. <P>COPYRIGHT: (C)2004,JPO

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】本発明は、極板切断方法に係
り、特に、正極集電体にリチウム含有複酸化物を塗着し
たリチウム二次電池用正極板及び負極集電体に炭素材を
塗着したリチウム二次電池用負極板の少なくとも一方を
切断するための極板切断方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cutting an electrode plate, and more particularly to a positive electrode plate for a lithium secondary battery in which a lithium-containing complex oxide is applied to a positive electrode current collector, and a carbon material for a negative electrode current collector. The present invention relates to an electrode plate cutting method for cutting at least one of the coated negative electrode plates for lithium secondary batteries.

【０００２】[0002]

【従来の技術】リチウム二次電池に代表される非水電解
液二次電池は、高エネルギー密度であるメリットを活か
して、主にＶＴＲカメラやノートパソコン、携帯電話な
どのポータブル機器に使用されている。特に、近年で
は、負極に炭素材等のリチウムイオンの吸蔵・放出が可
能な材料を用いたリチウムイオン二次電池が普及してい
る。通常、リチウムイオン二次電池の内部構造は捲回式
とされている。すなわち、金属箔（集電体）に活物質が
結着剤で塗着された正極板及び負極板がセパレータを挟
んで捲回された捲回群が、容器となる円筒形の缶に収容
され、電解液が注液された後、キャップがつけられ封口
されている。2. Description of the Related Art Non-aqueous electrolyte secondary batteries, typified by lithium secondary batteries, are mainly used in portable devices such as VTR cameras, laptop computers, and mobile phones, taking advantage of their high energy density. There is. In particular, in recent years, lithium ion secondary batteries using a material capable of inserting and extracting lithium ions such as a carbon material have become widespread in the negative electrode. Usually, the internal structure of a lithium ion secondary battery is of a wound type. That is, a winding group in which a positive electrode plate and a negative electrode plate, in which an active material is applied to a metal foil (current collector) with a binder, are wound with a separator sandwiched between them, are housed in a cylindrical can that serves as a container. After the electrolyte is injected, a cap is attached and sealed.

【０００３】電池組立時では、負極活物質として用いら
れる炭素材は、いわばリチウムイオンが放出しきった状
態、すなわち放電状態である。従って、通常は正極も放
電状態、すなわちリチウムイオンが吸蔵された状態の正
極活物質、例えば、コバルト酸リチウム（ＬｉＣｏ
Ｏ２）、ニッケル酸リチウム（ＬｉＮｉＯ２）、マンガ
ン酸リチウム（ＬｉＭｎ２Ｏ４）等が用いられる。そし
て、リチウムイオン二次電池は、電池を組み立てた後に
初充電をすることによって、電池としての機能が付与さ
れる。At the time of assembling a battery, the carbon material used as the negative electrode active material is, so to speak, in a state in which lithium ions are completely discharged, that is, in a discharged state. Therefore, the positive electrode is usually in a discharged state, that is, a positive electrode active material in which lithium ions are occluded, such as lithium cobalt oxide (LiCo).
O 2 ), lithium nickel oxide (LiNiO 2 ), lithium manganate (LiMn 2 O 4 ) and the like are used. Then, the lithium-ion secondary battery is given the function as a battery by initially charging after assembling the battery.

【０００４】また、近年、リチウムと豊富で低コストの
マンガンとを含むマンガン酸リチウム等のリチウムマン
ガン複酸化物を正極活物質とする非水電解液二次電池を
用いた電源システム、例えば、電気自動車用や内燃機関
と電気モータとを組み合わせたハイブリッド電気自動車
用の電源システムや、複数個の電池の負荷を平均化させ
るロードレベリングシステム等の研究、開発が盛んに行
われている。このような用途の電源システムでは、電池
は単電池で使われるのではなく、直列に数個から１００
個程度を接続した電池モジュールとして使われる。この
ため、電池モジュール内に一つでも電圧・容量等の電池
特性や経時変化による電池特性が他の電池と異なる電池
が入っていると、その異常特性の電池が他の電池の負荷
となって電池モジュール全体の特性を悪化させ信頼性を
低下させるおそれがある。この信頼性を確保するため
に、電池作製後に充電してから放置して異常特性の電池
を選別する方法があるが、この方法だけでは歩留まりも
悪く、信頼性も低い。In recent years, a power supply system using a non-aqueous electrolyte secondary battery having a lithium manganese oxide such as lithium manganate containing lithium and abundant and low cost manganese as a positive electrode active material, for example, electric BACKGROUND ART Research and development have been actively conducted on power supply systems for vehicles and hybrid electric vehicles that combine an internal combustion engine and an electric motor, and load leveling systems that average the loads of a plurality of batteries. In such a power supply system, the battery is not used as a single cell, but several to 100 in series.
It is used as a battery module in which about several pieces are connected. Therefore, if at least one battery in the battery module has different battery characteristics such as voltage / capacity and other characteristics due to aging, the battery with the abnormal characteristics becomes a load on the other battery. The characteristics of the entire battery module may be deteriorated and the reliability may be reduced. In order to ensure this reliability, there is a method of selecting a battery having abnormal characteristics by charging it after manufacturing the battery and then leaving it to stand. However, only this method has a low yield and low reliability.

【０００５】[0005]

【発明が解決しようとする課題】そこで、電圧低下を起
こす原因を鋭意調査した結果、極板中に金属粉が混入し
ており、これがセパレータを貫通させたり、充放電に伴
いこれらの金属粉が溶解して電解液中に溶出した金属イ
オンが、デンドライト状に負極から析出、成長し正負極
板間で僅かな電流がリークする微小短絡を起こすためで
あることが判った。更に、リチウム二次電池の製造工程
中で、特に金属粉が混入する工程は、極板を切断すると
きである可能性が高いことが判明した。通常、極板の切
断には、ロールカッタを使用し、切断部分で生じる集電
体の切りくずや刃の摩耗粉等の金属粉が極板中に混入す
ることを防止する対策として、切断時に空気を吹きつけ
たり、吸引したりしている。Therefore, as a result of an intensive investigation on the cause of the voltage drop, metal powder is mixed in the electrode plate, and this metal powder penetrates the separator, and these metal powders are generated by charging and discharging. It was found that the metal ions dissolved and eluted in the electrolytic solution were deposited and grown in the form of dendrites from the negative electrode to cause a minute short circuit in which a slight current leaked between the positive and negative electrode plates. Further, it has been found that there is a high possibility that the process in which the metal powder is mixed in the manufacturing process of the lithium secondary battery is when the electrode plate is cut. Usually, a roll cutter is used for cutting the electrode plate, and as a measure to prevent metal powder such as chips of the current collector and abrasion powder of the blade generated at the cutting part from mixing into the electrode plate, Blows or sucks air.

【０００６】しかしながら、空気を吹きつけると金属粉
が舞い上がり切断部分とは別の部分で極板に付着する可
能性があり、吸引しても除去能力が足りないことが多
い。また、切断部分では金属粉や結着剤等が刃や刃に対
向するロールに付着し、金属粉を含む付着物が別の部分
を切断するときに剥落して極板中に混入する。However, when air is blown, the metal powder may fly up and adhere to the electrode plate at a portion other than the cut portion, and the removal ability is often insufficient even if sucked. Further, at the cutting portion, metal powder, a binder and the like adhere to the blade and the roll facing the blade, and the deposit containing the metal powder is peeled off and mixed into the electrode plate when cutting another portion.

【０００７】本発明は、上記事案に鑑み、微小短絡によ
るリチウム二次電池の電圧低下を抑制する極板切断方法
を提供することを課題とする。In view of the above problems, it is an object of the present invention to provide a method of cutting an electrode plate which suppresses a voltage drop of a lithium secondary battery due to a minute short circuit.

【０００８】[0008]

【課題を解決するための手段】上記課題を解決するため
に、本発明は、正極集電体にリチウム含有複酸化物を塗
着したリチウム二次電池用正極板及び負極集電体に炭素
材を塗着したリチウム二次電池用負極板の少なくとも一
方を切断するための極板切断方法であって、前記切断に
使用する刃又は該刃に対向するロールに、前記刃又はロ
ールに付着した金属性付着物を除去する樹脂製のスクレ
ーパを押し付けながら前記極板を切断することを特徴と
する。In order to solve the above-mentioned problems, the present invention is directed to a positive electrode plate for a lithium secondary battery in which a lithium-containing complex oxide is applied to a positive electrode current collector, and a carbon material for a negative electrode current collector. A method for cutting at least one of the negative electrode plates for lithium secondary batteries coated with, a blade used for the cutting or a roll facing the blade, a metal adhered to the blade or the roll. It is characterized in that the electrode plate is cut while pressing a resin-made scraper for removing the sexually adhered substance.

【０００９】本発明によれば、正極板及び負極板の少な
くとも一方の切断に使用される刃又は該刃に対向するロ
ールに樹脂製のスクレーパが押し付けられ、刃又はロー
ルに付着した金属性付着物がスクレーパにより除去され
ながら極板が刃で切断されるので、金属性付着物が刃や
ロールから剥落して極板中に混入することを防止するこ
とができる。このため、作製されたリチウム二次電池で
は、金属粉に起因する微小短絡の発生が防止されるの
で、電圧低下を抑制することができる。According to the present invention, a resin scraper is pressed against a blade used for cutting at least one of a positive electrode plate and a negative electrode or a roll facing the blade, and a metallic deposit adhered to the blade or the roll. Since the electrode plate is cut by the blade while being removed by the scraper, it is possible to prevent metallic deposits from being removed from the blade or roll and being mixed into the electrode plate. For this reason, in the manufactured lithium secondary battery, the occurrence of a minute short circuit due to the metal powder is prevented, so that the voltage drop can be suppressed.

【００１０】この場合において、スクレーパの先端部を
凸形状とし、該凸形状部が刃又はロールに押し付けられ
れば、スクレーパの先端部が金属性付着物を除去しやす
くなるので、効率的に金属性付着物を除去することがで
きる。また、スクレーパが、金属性付着物を収容する収
容部を有すれば、金属性付着物が収容されるので、切断
部分とは別の部分で金属性付着物が極板中に混入するこ
とを防止することができる。In this case, if the tip of the scraper is formed into a convex shape and the convex portion is pressed against a blade or a roll, the tip of the scraper can easily remove metallic deposits, so that the scrap is efficiently made of metal. The deposit can be removed. In addition, if the scraper has a storage portion for storing the metallic deposit, the metallic deposit is stored, so that the metallic deposit may be mixed into the electrode plate at a portion other than the cut portion. Can be prevented.

【００１１】[0011]

【発明の実施の形態】（第１実施形態）以下、図面を参
照して、本発明を円筒型リチウムイオン二次電池の作製
方法に適用した第１の実施の形態について説明する。BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment) A first embodiment in which the present invention is applied to a method for producing a cylindrical lithium ion secondary battery will be described below with reference to the drawings.

【００１２】（正極板）リチウム含有複酸化物（正極活
物質）としてマンガン酸リチウム粉末、導電材として炭
素粉末、及びバインダとしてポリフッ化ビニリデン（以
下、ＰＶＤＦと略す。）を、重量比８０：１５：５で混
合し、そこへ分散溶媒となるＮ−メチルピロリドン（以
下、ＮＭＰと略す。）を適量加えて十分に混練し、分散
させて、スラリとする。このスラリをロール・トゥ・ロ
ールの転写によって正極集電体となる厚さ２０μｍのア
ルミニウム箔の両面に塗着して乾燥させる。その後、８
０〜１２０°Ｃに加熱したロールを有するロールプレス
機により、プレス圧（線圧）１９６〜４９０Ｐａ・ｍ
（０．２〜０．５ｋｇｆ／ｃｍ）で、正極活物質層の密
度が約２．８ｇ／ｃｍ３となるまで圧縮し、ロール状に
巻き取ることによりロール状の正極板を得る。次いで、
ロール状の正極板から正極板を引き出し、切断装置（ロ
ールカッタ）で所定幅に切断して、フープ状に巻き取
る。フープ状の正極板から正極板を引き出し、はさみ状
カッタで所定長さに切断して短冊状とする。(Positive Electrode Plate) Lithium manganate powder as a lithium-containing composite oxide (positive electrode active material), carbon powder as a conductive material, and polyvinylidene fluoride (hereinafter abbreviated as PVDF) as a binder, in a weight ratio of 80:15. : N-methylpyrrolidone (hereinafter abbreviated as NMP) serving as a dispersion solvent is added thereto, and the mixture is sufficiently kneaded and dispersed to obtain a slurry. This slurry is applied onto both sides of a 20 μm thick aluminum foil which will be a positive electrode current collector by roll-to-roll transfer and dried. Then 8
By a roll press machine having a roll heated to 0 to 120 ° C, press pressure (linear pressure) 196 to 490 Pa · m
(0.2 to 0.5 kgf / cm), the positive electrode active material layer is compressed to a density of about 2.8 g / cm 3 and wound into a roll to obtain a roll-shaped positive electrode plate. Then
The positive electrode plate is pulled out from the roll-shaped positive electrode plate, cut into a predetermined width by a cutting device (roll cutter), and wound into a hoop shape. The positive electrode plate is pulled out from the hoop-shaped positive electrode plate, and cut into a predetermined length with a scissor cutter to form a strip shape.

【００１３】図１に示すように、正極板を幅方向に切断
する切断装置１０は、切断装置１０のケーシングとなる
図示しないフレームを有している。切断装置１０のフレ
ームには、略水平方向一側（矢印Ａ方向）に搬送される
極板３（正極板及び／又は後述する負極板）と交差する
方向に極板３を挟んで平行に配設された上回転軸６及び
下回転軸６’が回転可能に軸支されている。回転軸６、
６’には、極板３の両幅側（搬送方向と交差する方向
側）を切断する鋼鉄製円盤状の２枚の極板切断刃１、
１’が所定間隔を隔てて固定されている。刃１、１’の
円盤外周縁には研削された刃先が形成されている。As shown in FIG. 1, the cutting device 10 for cutting the positive electrode plate in the width direction has a frame (not shown) which serves as a casing of the cutting device 10. In the frame of the cutting device 10, the electrode plates 3 are arranged in parallel in a direction intersecting with the electrode plates 3 (positive electrode plate and / or negative electrode plate to be described later) conveyed to one side in the substantially horizontal direction (direction of arrow A). The upper rotary shaft 6 and the lower rotary shaft 6'provided are rotatably supported. Rotating shaft 6,
6'includes two steel disk-shaped electrode plate cutting blades 1 for cutting both width sides of the electrode plate 3 (directions intersecting the conveying direction),
1'is fixed at a predetermined interval. A ground edge is formed on the outer peripheral edge of the disk of each of the blades 1 and 1 '.

【００１４】回転軸６、６’は、図示しないモータのモ
ータ軸にギアを介して接続されており、モータの駆動力
により同一方向に回転される。すなわち、刃１は極板３
の搬送方向とは逆方向に回転され、刃１’は極板３の搬
送方向と同一方向に回転される（図１の参照符号１、
１’の矢印参照）。これらの刃１、１’は、対応する上
下の刃で擦れ違い刃を構成している。The rotating shafts 6 and 6'are connected to a motor shaft of a motor (not shown) via a gear and are rotated in the same direction by the driving force of the motor. That is, the blade 1 is the electrode plate 3
1 is rotated in the opposite direction to the transport direction, and the blade 1 ′ is rotated in the same direction as the transport direction of the electrode plate 3 (reference numeral 1 in FIG. 1,
(See 1'arrow). These blades 1 and 1'comprise the upper and lower blades corresponding to each other to form a mutually rubbing blade.

【００１５】また、極板３の搬送方向で回転軸６、６’
の下流側には、刃１、１’に対応して、高密度ポリプロ
ピレン製で刃１、１’に付着した極板３の金属粉末（金
属性付着物）を除去するスクレーパ２及びスクレーパ
２’が配設されている。スクレーパ２、２’は、先端部
側が断面略くさび形状（凸形状）、後端部側が断面矩形
状で、くさび形状先端部の上方が開口され、後端部側に
金属粉末を収容する収容部を有している。The rotating shafts 6 and 6'in the transport direction of the electrode plate 3 are also provided.
Scraper 2 and scraper 2'corresponding to blades 1 and 1 ', which are made of high-density polypropylene and remove metal powder (metallic deposits) of electrode plate 3 attached to blades 1 and 1', on the downstream side of Is provided. The scrapers 2 and 2'have a substantially wedge-shaped cross section (convex shape) on the front end side, a rectangular cross-section on the rear end side, an opening above the wedge-shaped front end, and a metal powder storage portion on the rear end side. have.

【００１６】スクレーパ２、２’の後端部は、断面略コ
字状の支持部材の内側に挿入されている。支持部材は、
スクレーパ２、２’の後端部側を極板３の搬送方向とは
反対方向の刃１、１’の方向に付勢する図示しないバネ
を有している。このため、スクレーパ２、２’のくさび
形状先端部の長手方向略中央部は、支持部材のバネの付
勢力により、刃１、１’の刃先に交差するように押し付
けられており、くさび形状先端部及び開口を介してスク
レーパ２、２’内に進入した金属粉末は、後端部側のス
クレーパ２、２’の収容部内へ収容される。The rear ends of the scrapers 2 and 2'are inserted inside a support member having a substantially U-shaped cross section. The support member is
The scrapers 2 and 2 ′ have springs (not shown) for urging the rear end side of the scrapers 2 and 1 ′ in the direction of the blades 1 and 1 ′ opposite to the conveying direction of the electrode plate 3. For this reason, the substantially central portion in the longitudinal direction of the wedge-shaped tip portions of the scrapers 2 and 2'is pressed by the biasing force of the spring of the support member so as to intersect the blade edges of the blades 1 and 1 ', and the wedge-shaped tip portions. The metal powder that has entered the scraper 2, 2 ′ through the section and the opening is stored in the storage section of the scraper 2, 2 ′ on the rear end side.

【００１７】ロール状の正極板から略水平方向に搬送さ
れた正極板は、切断装置１０により刃１、１’の間を通
過することで、両幅側が所定幅に切断され、切断された
正極板がフープ状に巻き取られる。切断時に刃１、１’
に付着したアルミニウム箔や刃１、１’の金属粉末及び
ＰＶＤＦ等の付着物は、支持部材のバネの付勢力により
刃１、１’に押し付けられた高密度ポリプロピレン製の
スクレーパ２、２’のくさび形状先端部で除去され、後
端部側の収容部に収容される。なお、切断時に生じた両
幅側の切れ端は、回転軸６、６’への巻き付きを防止す
るために、図示しない吸引装置に接続された導管を通じ
て吸引除去され、装置１０の外部に集積される。The positive electrode plate conveyed in a substantially horizontal direction from the roll-shaped positive electrode plate is passed between the blades 1 and 1'by the cutting device 10 so that both width sides are cut into a predetermined width, and the cut positive electrode is cut. The board is wound into a hoop. Blades 1 and 1'when cutting
The aluminum foil and the metal powder of the blades 1 and 1'and the adhered matters such as PVDF adhere to the blades of the high density polypropylene scrapers 2 and 2'which are pressed against the blades 1 and 1'by the biasing force of the spring of the supporting member. It is removed at the wedge-shaped front end and stored in the rear end side storage portion. It should be noted that the cut ends on both width sides generated at the time of cutting are suctioned and removed through a conduit connected to a suction device (not shown) in order to prevent winding on the rotating shafts 6 and 6 ′, and are accumulated outside the device 10. .

【００１８】（負極板）炭素材（負極活物質）として非
晶質炭素（呉羽化学工業株式会社製、商品名：カーボト
ロンＰ）と、バインダとしてＰＶＤＦとを重量比で９
０：１０となるように混合し、そこへＮＭＰを適量加え
て十分に混練し、分散させてスラリとする。このスラリ
をロール・トゥ・ロールの転写により負極集電体となる
厚さ１０μｍの銅箔の両面に塗着して乾燥させる。その
後、８０〜１２０°Ｃに加熱したロールを有するロール
プレス機により、プレス圧（線圧）１９６〜４９０Ｐａ
・ｍ（０．２〜０．５ｋｇｆ／ｃｍ）で、負極活物質層
の密度が約１．０ｇ／ｃｍ３となるまで圧縮し、ロール
状に巻き取ることによりロール状の負極板を得る。次い
で、正極板を切断する切断装置１０と同様の切断装置を
用いることで、ロール状の極板から引き出された負極板
を所定幅に切断し、フープ状に巻き取る。フープ状の負
極板から負極板を引き出し、はさみ状カッタで所定長さ
に切断して短冊状とする。(Negative electrode plate) Amorphous carbon (trade name: Carbotron P, manufactured by Kureha Chemical Industry Co., Ltd.) as a carbon material (negative electrode active material) and PVDF as a binder in a weight ratio of 9
Mix so as to be 0:10, add an appropriate amount of NMP thereto, sufficiently knead, and disperse into slurry. The slurry is applied onto both surfaces of a copper foil having a thickness of 10 μm to be a negative electrode current collector by roll-to-roll transfer and dried. Then, with a roll press machine having a roll heated to 80 to 120 ° C., press pressure (linear pressure) of 196 to 490 Pa.
-It is compressed to a density of the negative electrode active material layer of about 1.0 g / cm 3 at m (0.2 to 0.5 kgf / cm) and wound into a roll to obtain a roll-shaped negative electrode plate. Then, by using a cutting device similar to the cutting device 10 for cutting the positive electrode plate, the negative electrode plate pulled out from the roll-shaped electrode plate is cut into a predetermined width and wound into a hoop shape. The negative electrode plate is pulled out from the hoop-shaped negative electrode plate, and cut into a predetermined length with a scissor cutter to form a strip.

【００１９】（電池組立）図２に示すように、短冊状の
正極板と負極板とを、厚さ２５μｍ、微多孔性ポリエチ
レンフィルムの帯状のセパレータ１５を介して捲回し、
捲回群１６を作製する。このとき、正極板、負極板及び
セパレータ１５の長さを調節することにより捲回群１６
の外径が電池缶１７に挿入可能に捲回する。捲回群１６
を電池缶１７に挿入し、負極タブ端子２１の一端を負極
集電体１３に予め溶接しておき、他端を電池缶１７の内
底部に溶接する。正極タブ端子１９の一端を予め正極集
電体１１に溶接しておき、他端を正極キャップ１８に溶
接する。次に、電解液５ｍｌを電池缶１７内に注液す
る。電解液には、エチレンカーボネートとジメチルカー
ボネートを体積比で１：２に混合した溶媒に６フッ化リ
ン酸リチウム（ＬｉＰＦ ６）を１ｍｏｌ／ｌの濃度で溶
解したものが用いられる。次いで、正極キャップ１８を
電池缶１７上部に配置し、絶縁性のガスケット２０を介
して電池缶１７上部をかしめて密閉し、高さ６５ｍｍ、
直径１８ｍｍの円筒型リチウムイオン二次電池２５の組
立を完成させる。正極キャップ１８内には、電池内圧の
上昇に応じて作動する電流遮断機構（圧力スイッチ）
と、この電流遮断機構より高い圧力で作動する弁機構と
が組み込まれている。なお、本実施形態では、作動圧８
８２ｋＰａの電流遮断機構及び作動圧１．９６ＭＰａの
弁機構を用いた。(Battery assembly) As shown in FIG.
A positive electrode plate and a negative electrode plate are made of a 25 μm thick microporous polyethylene.
Wound via the strip-shaped separator 15 of the Ren film,
The winding group 16 is produced. At this time, the positive electrode plate, the negative electrode plate and
By adjusting the length of the separator 15, the winding group 16
The outer diameter of is wound so that it can be inserted into the battery can 17. Winding group 16
Insert the battery into the battery can 17 and connect one end of the negative electrode tab terminal 21 to the negative electrode.
It is previously welded to the current collector 13 and the other end is inside the battery can 17.
Weld to the bottom. Connect one end of the positive electrode tab terminal 19 to the positive electrode in advance.
Weld it to the electric body 11 and melt the other end into the positive electrode cap 18.
Contact. Next, 5 ml of electrolyte is poured into the battery can 17.
It The electrolytic solution contains ethylene carbonate and dimethyl car
A mixture of 1: 1 by volume of Bonate was added to hexafluorotrifluoride.
Lithium oxide (LiPF 6) At a concentration of 1 mol / l
The understood one is used. Then, the positive electrode cap 18
It is placed on the top of the battery can 17, and the insulating gasket 20 is interposed.
Then, the upper part of the battery can 17 is caulked and hermetically sealed, and the height is 65 mm,
A set of cylindrical lithium ion secondary batteries 25 having a diameter of 18 mm
Complete the standing. Inside the positive electrode cap 18,
Current interruption mechanism (pressure switch) that operates according to rising
And a valve mechanism that operates at a higher pressure than this current cutoff mechanism
Is built in. In this embodiment, the working pressure is 8
82 kPa current interruption mechanism and operating pressure 1.96 MPa
A valve mechanism was used.

【００２０】本実施形態では、バネの付勢力により刃
１、１’に押し付けられたスクレーパ２、２’のくさび
形状先端部で、刃1、1’に付着した金属粉末が除去され
ながら正極板及び負極板が切断されるので、極板切断中
に刃１、１’から金属粉末が剥がれ落ちて極板に混入す
ることを防止することができる。金属粉末は、スクレー
パ２、２’の後端部側のほぼ密閉された収容部内へ収容
されるので、金属粉末が極板の切断部分とは別の部分に
飛散することを防止することができる。また、スクレー
パ２、２’は、高密度ポリプロピレン製のため、くさび
形状先端部が刃１、１’に切り込まれるので、切り口が
刃１、１’の側面に付着した金属粉末をこすり取ること
ができる。In this embodiment, the wedge-shaped tip portions of the scrapers 2 and 2'which are pressed against the blades 1 and 1'by the biasing force of the spring remove the metal powder adhered to the blades 1 and 1'and the positive electrode plate. Also, since the negative electrode plate is cut, it is possible to prevent the metal powder from peeling off from the blades 1 and 1 ′ and cutting into the electrode plate during cutting of the electrode plate. Since the metal powder is stored in the substantially closed storage portion on the rear end side of the scrapers 2, 2 ', it is possible to prevent the metal powder from scattering to a portion other than the cut portion of the electrode plate. . Further, since the scrapers 2 and 2'are made of high-density polypropylene, the wedge-shaped tip portions are cut into the blades 1 and 1 ', so the cut ends should scrape off the metal powder adhering to the side surfaces of the blades 1 and 1'. You can

【００２１】作製された電池２５では、スクレーパ２、
２’の切りくずが極板に混入しても、高密度ポリプロピ
レンはデンドライト析出に影響しないので、電圧低下を
抑制することができると共に、電池２５の作製時の歩留
まりを向上させることができる。また、作製された電池
２５には、金属粉末が混入されていないので、充放電を
繰り返す使用時でも、微小短絡による電圧低下が抑制さ
れるため、電池２５を電池モジュールとして用いる場合
でも、電池モジュール全体の信頼性を確保することがで
きる。In the prepared battery 25, the scraper 2,
Even if the 2 ′ chips are mixed in the electrode plate, the high-density polypropylene does not affect the dendrite precipitation, so that the voltage drop can be suppressed and the yield at the time of manufacturing the battery 25 can be improved. In addition, since the manufactured battery 25 contains no metal powder, the voltage drop due to a minute short circuit is suppressed even when the battery 25 is repeatedly charged and discharged. Therefore, even when the battery 25 is used as a battery module, The overall reliability can be ensured.

【００２２】（第２実施形態）次に、本発明を円筒型リ
チウムイオン二次電池の作製方法に適用した第２の実施
の形態について説明する。本実施形態は、刃１’を固定
した回転軸６’に代えて、極板３を支持するロールを有
する切断装置を用いたものである。なお、本実施形態に
おいて、第１実施形態と同一の部材には同一の符号を付
してその説明を省略し、異なる箇所のみ説明する。(Second Embodiment) Next, a second embodiment in which the present invention is applied to a method for manufacturing a cylindrical lithium ion secondary battery will be described. In the present embodiment, a cutting device having a roll that supports the electrode plate 3 is used instead of the rotating shaft 6 ′ that fixes the blade 1 ′. In this embodiment, the same members as those in the first embodiment are designated by the same reference numerals, the description thereof will be omitted, and only different portions will be described.

【００２３】図３に示すように、切断装置１０’は、第
１実施形態の回転軸６’に代えて、極板３を挟んで回転
軸６と平行に極板３を支持する円柱状のロール４を有し
ている。ロール４は、極板３の搬送速度と同一速度で極
板３の搬送方向と同一方向に回転される（図３の矢印参
照）。ロール４の長さは、刃１の所定間隔より長く設定
されている。刃１の刃先に対応するロール４の位置に
は、図示しない溝が形成されている。極板３の搬送方向
でロール４の下流側には、第１実施形態のスクレーパ
２’に代えて、くさび形状先端部の長手方向の幅がロー
ル４より長いロールスクレーパ５が配置されている。ロ
ールスクレーパ５のくさび形状先端部の長手方向は、ロ
ール４の長さ方向と同じとされている。ロールスクレー
パ５のくさび形状先端部は、バネの付勢力でロール４の
長さ方向全体に押し付けられている。As shown in FIG. 3, the cutting device 10 'has a columnar shape that supports the electrode plate 3 in parallel with the rotating shaft 6 with the electrode plate 3 sandwiched in place of the rotating shaft 6'of the first embodiment. It has a roll 4. The roll 4 is rotated in the same direction as the conveyance direction of the electrode plate 3 at the same speed as the conveyance speed of the electrode plate 3 (see the arrow in FIG. 3). The length of the roll 4 is set longer than the predetermined interval of the blade 1. A groove (not shown) is formed at a position of the roll 4 corresponding to the cutting edge of the blade 1. Instead of the scraper 2 ′ of the first embodiment, a roll scraper 5 having a wedge-shaped tip portion whose longitudinal width is longer than that of the roll 4 is arranged downstream of the roll 4 in the transport direction of the electrode plate 3. The longitudinal direction of the wedge-shaped tip of the roll scraper 5 is the same as the longitudinal direction of the roll 4. The wedge-shaped tip of the roll scraper 5 is pressed against the entire length of the roll 4 by the urging force of a spring.

【００２４】正極板及び負極板は、切断装置１０’によ
り刃１とロール４との間を通過することで、ロール４に
支持され刃１で所定幅に切断される。ロール４に付着し
た金属粉末等の付着物は、バネの付勢力でロール４に押
し付けられたロールスクレーパ５のくさび形状先端部で
除去され、収容部へ収容される。The positive electrode plate and the negative electrode plate are supported by the roll 4 and cut into a predetermined width by the blade 1 by passing between the blade 1 and the roll 4 by the cutting device 10 '. Deposits such as metal powder attached to the roll 4 are removed by the wedge-shaped tip of the roll scraper 5 pressed against the roll 4 by the urging force of the spring, and are stored in the storage portion.

【００２５】本実施形態では、切断時に極板３がロール
４に支持されるので、刃１で極板３を切り損なうことな
く安定して所定幅に切断することができる。ロールスク
レーパ５は、ロール４の長さ方向全体に押し付けられる
ので、ロール４全体に付着した金属粉末を除去すること
ができる。In this embodiment, since the electrode plate 3 is supported by the roll 4 during cutting, it is possible to stably cut the electrode plate 3 into a predetermined width without damaging the electrode plate 3 with the blade 1. Since the roll scraper 5 is pressed against the entire length of the roll 4, the metal powder attached to the entire roll 4 can be removed.

【００２６】なお、上記実施形態では、スクレーパ２、
２’及びロールスクレーパ５の材質として高密度ポリプ
ロピレンを例示したが、本発明はこれに限定されるもの
ではなく、ポリアミド、ポリカーボネート、ポリオキシ
メチレン等の樹脂を用いてもよい。切断に使用する刃に
押し付ける場合を考慮すれば、硬度に優れるものを用い
ることが好ましい。In the above embodiment, the scraper 2,
Although high density polypropylene is exemplified as the material of 2'and the roll scraper 5, the present invention is not limited to this, and resins such as polyamide, polycarbonate and polyoxymethylene may be used. Considering the case of pressing against a blade used for cutting, it is preferable to use one having excellent hardness.

【００２７】また、スクレーパ２、２’及びロールスク
レーパ５の収容部に金属粉末が収容される例を示した
が、スクレーパ２、２’及びロールスクレーパ５の収容
部側面から導管を通じて金属粉末が吸引排出されるよう
にしてもよい。このようにすれば、収容部に金属粉末が
蓄積する都度廃棄することがなく、継続使用が可能とな
る。Further, an example has been shown in which the metal powder is stored in the storage portions of the scrapers 2, 2'and the roll scraper 5, but the metal powder is sucked through the conduits from the side surfaces of the storage portions of the scrapers 2, 2'and the roll scraper 5. It may be discharged. In this way, it is possible to continue use without discarding the metal powder every time it accumulates in the accommodating portion.

【００２８】更に、スクレーパ２、２’を刃１、１’
に、ロールスクレーパ５をロール４に押し付ける方法と
して、バネの付勢力を利用する例を示したが、本発明は
これに限定されるものではなく、油圧等を利用するよう
にしてもよい。また、スクレーパ２、２’を刃１、１’
の２枚ずつの刃先それぞれに押し付ける例を示したが、
刃１、１’の所定間隔より大きい幅のスクレーパ、例え
ばロールスクレーパ５と同様のスクレーパを刃１、１’
ごとに押し付けるようにしてもよい。Further, the scrapers 2 and 2'are attached to the blades 1 and 1 '.
Although the example in which the biasing force of the spring is used as the method of pressing the roll scraper 5 against the roll 4 is shown in the above, the present invention is not limited to this, and hydraulic pressure or the like may be used. In addition, scraper 2 and 2'to blade 1 and 1 '
I have shown an example of pressing each of the two blades of
A scraper having a width larger than a predetermined interval between the blades 1 and 1 ', for example, a scraper similar to the roll scraper 5 is used as the blades 1 and 1'.
You may push it for each.

【００２９】更にまた、上記実施形態では、正極板及び
負極板を、切断装置１０、１０’で切断する例を示した
が、本発明はこれに限定されるものではなく、例えば、
正極板の切断にロールカッタを、負極板の切断にレーザ
光線や高圧水流による切断装置を用い、正、負極板で異
なる切断方法としてもよい。Furthermore, in the above embodiment, an example in which the positive electrode plate and the negative electrode plate are cut by the cutting device 10, 10 'has been shown, but the present invention is not limited to this, and for example,
A roll cutter may be used to cut the positive electrode plate, and a cutting device using a laser beam or a high-pressure water stream may be used to cut the negative electrode plate, and different cutting methods may be used for the positive and negative electrode plates.

【００３０】また更に、上記実施形態では、切断装置１
０、１０’の刃の材質として鋼鉄製を例示したが、材質
をジルコニア等のセラミックスとするようにしてもよ
い。このような材質を用いることで、刃が摩耗しても金
属性ではないので、刃に起因する金属粉の極板中への混
入を防止することができる。Furthermore, in the above embodiment, the cutting device 1
Although steel is exemplified as the material of the blades 0 and 10 ′, the material may be ceramics such as zirconia. By using such a material, even if the blade is worn, it is not metallic, so that it is possible to prevent the metal powder from being mixed into the electrode plate due to the blade.

【００３１】また、上記実施形態では、正極活物質とし
て、マンガン酸リチウムを用いる例を示したが、本発明
はこれに限定されることなく、放電・充電によりリチウ
ムイオンの吸蔵・放出が可能なリチウム含有複酸化物で
あればよく、例えば、コバルト酸リチウム、ニッケル酸
リチウム等を用いることも可能である。また、マンガン
やリチウムの一部が他の元素で置換されていてもよい。In the above embodiment, an example in which lithium manganate is used as the positive electrode active material has been shown, but the present invention is not limited to this, and lithium ions can be inserted / extracted by discharging / charging. Any lithium-containing composite oxide may be used, and for example, lithium cobalt oxide, lithium nickel oxide, or the like can be used. Further, part of manganese or lithium may be replaced with another element.

【００３２】更に、上記実施形態では、負極活物質とし
て、非晶質炭素を用いる例を示したが、本発明はこれに
限定されることなく、充電・放電によりリチウムイオン
の吸蔵・放出が可能な炭素材であればよく、例えば、天
然黒鉛や人造の各種黒鉛材等を用いることも可能であ
る。また、その粒子形状においても、鱗片状、球状、繊
維状、塊状等、特に制限されるものではない。Furthermore, in the above embodiment, an example in which amorphous carbon is used as the negative electrode active material has been shown, but the present invention is not limited to this, and lithium ions can be inserted and extracted by charging and discharging. Any carbon material may be used, and for example, natural graphite or various artificial graphite materials may be used. Also, the particle shape is not particularly limited, and may be scale-like, spherical, fibrous, lump-like, or the like.

【００３３】[0033]

【実施例】次に、上記実施形態に従って作製した電池２
５の実施例について説明する。なお、比較のために作製
した比較例についても併記する。EXAMPLE Next, the battery 2 manufactured according to the above-mentioned embodiment
Example 5 will be described. A comparative example prepared for comparison is also shown.

【００３４】（実施例１）下表１に示すように、実施例
１では、第１実施形態に従って、正極板及び負極板の切
断を装置１０で行い、電池２５を作製した。(Example 1) As shown in Table 1 below, in Example 1, according to the first embodiment, the positive electrode plate and the negative electrode plate were cut by the apparatus 10 to prepare a battery 25.

【００３５】[0035]

【表１】 [Table 1]

【００３６】（実施例２）表１に示すように、実施例２
では、第２実施形態に従って、正極板及び負極板の切断
を装置１０’で行い、電池２５を作製した。(Example 2) As shown in Table 1, Example 2
Then, according to the second embodiment, the positive electrode plate and the negative electrode plate were cut by the device 10 ′ to manufacture the battery 25.

【００３７】（比較例１）表１に示すように、比較例１
では、正極板及び負極板の切断を、スクレーパのない切
断装置で行う以外は、実施例１と同様に電池を作製し
た。すなわち、図４に示すように、比較例１では、刃
１、１’にスクレーパが押し付けられていない従来の切
断装置を用いた。Comparative Example 1 As shown in Table 1, Comparative Example 1
Then, a battery was produced in the same manner as in Example 1 except that the cutting of the positive electrode plate and the negative electrode plate was performed using a cutting device without a scraper. That is, as shown in FIG. 4, in Comparative Example 1, a conventional cutting device in which the scraper was not pressed against the blades 1, 1 ′ was used.

【００３８】（微小短絡電池の選別試験）作製した実施
例及び比較例の電池それぞれ４００セルについて、以下
の条件で充放電容量を測定した後、４．２Ｖ充電後に２
５°Ｃ中に放置して電圧低下速度を測定した。このと
き、１４日めと２１日めとの電圧差を求め、１日当りの
電圧低下速度が、２．７ｍＶ／ｄａｙ以下の電池を合格
とした。電圧低下速度の値から合格率（合格電池数／全
試験電池数×１００）を求めた。試験結果を下表２に示
す。(Short-circuit test for micro-short-circuited battery) The 400 cells of each of the manufactured examples and comparative examples were measured for charge / discharge capacity under the following conditions, and after charging at 4.2 V, 2
It was left to stand at 5 ° C. and the voltage decrease rate was measured. At this time, the voltage difference between the 14th day and the 21st day was obtained, and the battery whose voltage reduction rate per day was 2.7 mV / day or less was regarded as acceptable. The pass rate (the number of passing batteries / the number of all test batteries × 100) was determined from the value of the voltage decrease rate. The test results are shown in Table 2 below.

【００３９】（充放電条件） 充電：定電圧充電４．２Ｖ、制限電流１４００ｍＡ、３
ｈ、２５°Ｃ 放電：定電流放電１４００ｍＡ、２４分、２５°Ｃ 充電：定電圧充電４．２Ｖ、制限電流１４００ｍＡ、３
ｈ、２５°Ｃ （充電、放電の間に、休止時間を１０分間設けた。）(Charging / Discharging Conditions) Charging: Constant voltage charging 4.2V, limiting current 1400mA, 3
h, 25 ° C discharge: constant current discharge 1400 mA, 24 minutes, 25 ° C charge: constant voltage charge 4.2 V, limiting current 1400 mA, 3
h, 25 ° C (A rest time of 10 minutes was provided between charging and discharging.)

【００４０】[0040]

【表２】 [Table 2]

【００４１】表２に示すように、刃や刃に対向するロー
ルの付着物をスクレーパで除去しながら正極板及び負極
板を切断した実施例１及び実施例２の電池では、電圧低
下速度の合格率が高くなった。これに対して、スクレー
パを使用せずに正極板及び負極板を切断した比較例１の
電池では、合格率が大きく低下した。従って、実施例１
及び実施例２の電池は、電池作製時の歩留まり及び信頼
性が向上する。As shown in Table 2, in the batteries of Examples 1 and 2 in which the positive electrode plate and the negative electrode plate were cut while removing the blades and the deposits of the rolls facing the blades with a scraper, the voltage drop rate passed. The rate has increased. On the other hand, in the battery of Comparative Example 1 in which the positive electrode plate and the negative electrode plate were cut without using the scraper, the pass rate was significantly reduced. Therefore, Example 1
Also, the battery of Example 2 has improved yield and reliability during battery production.

【００４２】[0042]

【発明の効果】以上説明したように、本発明によれば、
正極板及び負極板の少なくとも一方の切断に使用される
刃又は該刃に対向するロールに樹脂製のスクレーパが押
し付けられ、刃又はロールに付着した金属性付着物がス
クレーパにより除去されながら極板が刃で切断されるの
で、金属性付着物が刃やロールから剥落して極板中に混
入することを防止することができ、このため、作製され
たリチウム二次電池では、金属粉に起因する微小短絡の
発生が防止されるので、電圧低下を抑制することができ
る、という効果を得ることができる。As described above, according to the present invention,
A scraper made of resin is pressed against a blade used for cutting at least one of the positive electrode plate and the negative electrode plate or a roll facing the blade, and the electrode plate is formed while the metallic deposit adhered to the blade or the roll is removed by the scraper. Since it is cut with a blade, it is possible to prevent metallic deposits from being stripped from the blade or roll and being mixed in the electrode plate. Therefore, in the produced lithium secondary battery, it is caused by the metal powder. Since the occurrence of a minute short circuit is prevented, it is possible to obtain the effect of suppressing a voltage drop.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明が適用可能な第１実施形態の電池作製方
法に用いた切断装置の概略斜視図である。FIG. 1 is a schematic perspective view of a cutting device used in a battery manufacturing method according to a first embodiment to which the present invention is applicable.

【図２】実施形態の電池作製方法で作製された円筒型リ
チウムイオン二次電池の断面図である。FIG. 2 is a cross-sectional view of a cylindrical lithium ion secondary battery manufactured by the battery manufacturing method of the embodiment.

【図３】本発明が適用可能な第２実施形態の電池作製方
法に用いた切断装置の概略斜視図である。FIG. 3 is a schematic perspective view of a cutting device used in the battery manufacturing method of the second embodiment to which the present invention is applicable.

【図４】比較例の電池作製方法に用いた切断装置の概略
斜視図である。FIG. 4 is a schematic perspective view of a cutting device used in a battery manufacturing method of a comparative example.

【符号の説明】[Explanation of symbols]

１、１’ 極板切断刃（刃） ２、２’ スクレーパ ４ ロール ５ ロールスクレーパ（スクレーパ） ２５ 円筒型リチウムイオン二次電池（リチウム二次電
池）1, 1'Pole plate cutting blade (blade) 2, 2'Scraper 4 Roll 5 Roll scraper (scraper) 25 Cylindrical lithium ion secondary battery (lithium secondary battery)

───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 5H029 AJ01 AJ14 AK03 AL06 AL08 AM03 AM05 AM07 CJ04 CJ22 CJ30 DJ14 EJ04 EJ12 5H050 AA01 AA19 BA17 CA07 CA09 CB07 CB09 EA08 EA24 FA15 GA04 GA22 GA30    ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 5H029 AJ01 AJ14 AK03 AL06 AL08                       AM03 AM05 AM07 CJ04 CJ22                       CJ30 DJ14 EJ04 EJ12                 5H050 AA01 AA19 BA17 CA07 CA09                       CB07 CB09 EA08 EA24 FA15                       GA04 GA22 GA30

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 正極集電体にリチウム含有複酸化物を塗
着したリチウム二次電池用正極板及び負極集電体に炭素
材を塗着したリチウム二次電池用負極板の少なくとも一
方を切断するための極板切断方法であって、前記切断に
使用する刃又は該刃に対向するロールに、前記刃又はロ
ールに付着した金属性付着物を除去する樹脂製のスクレ
ーパを押し付けながら前記極板を切断することを特徴と
する極板切断方法。1. At least one of a positive electrode plate for a lithium secondary battery in which a lithium-containing complex oxide is applied to a positive electrode current collector and a negative electrode plate for a lithium secondary battery in which a carbon material is applied to a negative electrode current collector are cut. A method for cutting an electrode plate, wherein the blade used for the cutting or a roll facing the blade, the electrode plate while pressing a resin scraper for removing metallic deposits attached to the blade or the roll A method for cutting an electrode plate, which comprises cutting 【請求項２】 前記スクレーパの先端部が凸形状であ
り、該凸形状部が前記刃又はロールに押し付けられるこ
とを特徴とする請求項１に記載の極板切断方法。2. The method of cutting an electrode plate according to claim 1, wherein the scraper has a tip end portion having a convex shape, and the convex shape portion is pressed against the blade or the roll. 【請求項３】 前記スクレーパは、前記金属性付着物を
収容する収容部を有することを特徴とする請求項１又は
請求項２に記載の極板切断方法。3. The method of cutting an electrode plate according to claim 1, wherein the scraper has a housing portion for housing the metallic deposit.
JP2002114141A 2002-04-17 2002-04-17 Method of cutting electrode plate Pending JP2003308835A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002114141A JP2003308835A (en) 2002-04-17 2002-04-17 Method of cutting electrode plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002114141A JP2003308835A (en) 2002-04-17 2002-04-17 Method of cutting electrode plate

Publications (1)

Publication Number Publication Date
JP2003308835A true JP2003308835A (en) 2003-10-31

Family

ID=29396068

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002114141A Pending JP2003308835A (en) 2002-04-17 2002-04-17 Method of cutting electrode plate

Country Status (1)

Country Link
JP (1) JP2003308835A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007273125A (en) * 2006-03-30 2007-10-18 Matsushita Electric Ind Co Ltd Forming method of porous heatproof layer and forming device of porous heatproof layer
CN116422775A (en) * 2023-06-12 2023-07-14 上海治臻新能源股份有限公司 Rolling forming equipment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007273125A (en) * 2006-03-30 2007-10-18 Matsushita Electric Ind Co Ltd Forming method of porous heatproof layer and forming device of porous heatproof layer
CN116422775A (en) * 2023-06-12 2023-07-14 上海治臻新能源股份有限公司 Rolling forming equipment
CN116422775B (en) * 2023-06-12 2023-09-08 上海治臻新能源股份有限公司 Rolling forming equipment

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