JP2002093407A - Manufacturing method and device for battery electrode sheet - Google Patents

Manufacturing method and device for battery electrode sheet

Info

Publication number
JP2002093407A
JP2002093407A JP2000276103A JP2000276103A JP2002093407A JP 2002093407 A JP2002093407 A JP 2002093407A JP 2000276103 A JP2000276103 A JP 2000276103A JP 2000276103 A JP2000276103 A JP 2000276103A JP 2002093407 A JP2002093407 A JP 2002093407A
Authority
JP
Japan
Prior art keywords
hot air
tape
region
running
paste
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
JP2000276103A
Other languages
Japanese (ja)
Inventor
Hideo Nagase
英雄 永瀬
Keisuke Itaba
啓介 板場
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.)
FDK Twicell Co Ltd
Original Assignee
Toshiba Battery 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 Toshiba Battery Co Ltd filed Critical Toshiba Battery Co Ltd
Priority to JP2000276103A priority Critical patent/JP2002093407A/en
Publication of JP2002093407A publication Critical patent/JP2002093407A/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

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method and a manufacturing device for a battery electrode sheet capable of reducing cost, and efficiently and safely drying the electrode sheet. SOLUTION: This manufacturing device comprises a running rollers 1a, 1b for running a tape-like support body 2 in a constant direction, a pasty electrode mix vessel 3 for passing and running the tape-like support body 2 and coating the main surface of the tape-like support body 2 with the pasty electrode mix 4, a coating amount control means 5 disposed in the running direction of the tape-like support body 2 for controlling the amount of the applied pasty electrode mix, and a tunnel-shaped drying oven 9 for drying through which a tape- like support body 2' controlled in the applied amount runs. The tunnel-shaped drying oven 9 comprises a first region having hot air blast nozzles 10a and 10b for jetting hot air to the applied surface of the electrode mix of the running tape-like support body 2', a second region 9b that is connected to the first region and is constricted, and has an orifice structure 9b' for increasing hot air speed, and a third region 9c that is connected to the second region 9b and has a hot air exhaust port for discharging the hot air.

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、テープ状支持体面
にペースト状電極合剤を塗工（塗布・充填）し、乾燥処
理を施す手段を含む電池用電極シートの製造方法、およ
び製造装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for producing a battery electrode sheet including means for applying (applying and filling) a paste-like electrode mixture to a tape-like support surface and performing a drying treatment. .

【０００２】[0002]

【従来の技術】たとえばニッケル亜鉛電池やニッケル水
素電池などは、携帯型の電源として各種の電気機器類も
しくは電子機器類に多用されている。そして、携帯型電
源として使用されている電池類は、いわゆる化学反応の
エネルギーを利用しており、負極活物質を含む負極系、
正極活物質を含む正極系および電解液（電解質）系を電
池の発電要素として構成されている。2. Description of the Related Art Nickel-zinc batteries, nickel-metal hydride batteries, and the like are widely used as portable power sources in various electric and electronic devices. Batteries used as portable power supplies utilize energy of a so-called chemical reaction, and a negative electrode system including a negative electrode active material,
A positive electrode system including a positive electrode active material and an electrolyte (electrolyte) system are configured as power generation elements of a battery.

【０００３】より具体的には、ニッケル水素電池の場
合、正極は、たとえば合成樹脂繊維不織布や合成樹脂発
泡体にニッケルメッキを施したものを支持体とし、この
支持体に水酸化ニッケルおよび水を主成分とするペース
ト状電極合剤を塗工し、乾燥処理して形成されている。
また、負極は、たとえば穴あき圧延鋼板を支持体とし、
この支持体に水素吸蔵合金および水を主成分とするペー
スト状電極合剤を塗工し、乾燥処理して形成されてい
る。More specifically, in the case of a nickel-metal hydride battery, the positive electrode is made of, for example, a synthetic resin fiber non-woven fabric or a synthetic resin foam plated with nickel, and this support is coated with nickel hydroxide and water. It is formed by applying and drying a paste-like electrode mixture as a main component.
Further, the negative electrode, for example, using a perforated rolled steel plate as a support,
This support is formed by applying a paste-form electrode mixture containing hydrogen storage alloy and water as main components and drying.

【０００４】図３は、上記電池用電極シートの製造装置
の概略構成を示す断面図である。図３において、１ａ、
１ｂはテープ状支持体２を一定方向に走行させる走向ロ
ーラ（上、下ローラ）、３は前記テープ状支持体２を挿
通・走向させ、テープ状支持体２の両主面にペースト状
電極合剤４を塗工するペースト状電極合剤容器である。
また、５は前記テープ状支持体２の走行方向に配置さ
れ、塗工されたペースト状電極合剤量を制御する塗工量
制御手段であり、たとえば一定間隔を持たせて一対のス
リット部材を対向配置して成るスリット機構である。さ
らに、６は前記塗工量が制御されたテープ状支持体２′
が走行する乾燥用のトンネル型炉、７ａ、７ｂは前記ト
ンネル型乾燥炉内の入り口側に配置され、ペースト状電
極合剤の塗工面に熱風を吹き付ける熱風吹き出し口、８
ａ、８ｂは前記トンネル型乾燥炉６の出口側に配置され
熱風を排気する熱風排気口である。FIG. 3 is a cross-sectional view showing a schematic configuration of an apparatus for manufacturing the battery electrode sheet. In FIG. 3, 1a,
Reference numeral 1b denotes running rollers (upper and lower rollers) for running the tape-shaped support 2 in a predetermined direction. Reference numeral 3 denotes a tape-shaped support 2 which is inserted and runs. This is a paste-like electrode mixture container for applying the agent 4.
Reference numeral 5 denotes a coating amount control means which is arranged in the running direction of the tape-shaped support member 2 and controls the amount of the coated paste-like electrode mixture. This is a slit mechanism that is arranged to face each other. Further, reference numeral 6 denotes a tape-like support 2 'whose coating amount is controlled.
The tunnel-type furnace 7a, 7b for running the drying is disposed at the entrance side in the tunnel-type drying furnace, and a hot-air outlet for blowing hot air onto the coating surface of the paste-like electrode mixture;
Reference numerals a and 8b denote hot-air outlets that are disposed on the exit side of the tunnel type drying furnace 6 and exhaust hot air.

【０００５】上記電池用電極シートの製造装置による電
極シートの製造においては、その生産性ないし生産速度
は、テープ状支持体２にペースト状電極合剤４を塗工し
た後、乾燥用のトンネル型乾燥炉６内を通過する時間
（通過過程での乾燥時間）に規制される。つまり、
（ａ）トンネル型乾燥炉６の長さを長く設定するか、
（ｂ）ペースト状電極合剤を塗工したテープ状支持体
２′に吹き付ける熱風温度を高く設定するか、（ｃ）吹
き付ける熱風量を増大するかによって、電池用電極シー
トの生産速度を相対的に上げることができる。[0005] In the production of an electrode sheet by the above-mentioned apparatus for producing an electrode sheet for a battery, the productivity or production rate is determined by coating a paste-like electrode mixture 4 on a tape-like support 2 and then drying it by a tunnel type for drying. It is regulated by the time of passing through the drying furnace 6 (drying time in the passage process). That is,
(A) If the length of the tunnel type drying furnace 6 is set to be long,
The production speed of the battery electrode sheet can be relatively controlled by setting the temperature of the hot air blown to the tape-like support 2 ′ coated with the paste-like electrode mixture high, or (c) increasing the amount of hot air blown. Can be raised.

【０００６】[0006]

【発明が解決しようとする課題】しかし、（ａ）のトン
ネル型乾燥炉６を長くすることは、設置スペースの増大
となり、スペース効率の点で問題がある。また、（ｂ）
の吹き付ける熱風温度を高温化することは、塗工した電
極合剤が熱的な影響を受けて、電池性能の劣化ないし低
下を招来し易いだけでなく、電極活物質（たとえば水素
吸蔵合金）の発火事故などを起こす恐れがあり、作業の
安全性の点でも懸念される。さらに、（ｃ）の吹き付け
る熱風量を増大させた場合は、流路断面内（流れと直交
する面）で風速ムラが生じ易く、この風速ムラによるテ
ープ状支持体２′の揺れが発生し、乾燥の均一性や活物
質層厚の均一性が損なわれる。つまり、いずれの場合
も、生産性の向上に有効な手段とはいえない。However, increasing the length of the tunnel-type drying furnace 6 in (a) increases the installation space, and is problematic in terms of space efficiency. (B)
Increasing the temperature of the hot air that is blown by the hot air not only causes the coated electrode mixture to be thermally affected to cause deterioration or deterioration of the battery performance, but also causes deterioration of the electrode active material (for example, hydrogen storage alloy). There is a risk of fire accidents, and there is a concern about work safety. Further, when the amount of hot air blown by (c) is increased, wind speed unevenness is likely to occur in the cross section of the flow path (a surface orthogonal to the flow), and the tape-shaped support 2 'sway due to the wind speed unevenness occurs. The uniformity of drying and the uniformity of the thickness of the active material layer are impaired. That is, in any case, it is not an effective means for improving productivity.

【０００７】上記電池用電極シートの生産性対策とし
て、熱風乾燥に電気的な赤外線ヒータを併用する方式、
あるいは精度が高い熱風吹き出しノズルを使用する熱風
フローシステムなどが提案されている。しかし、これら
の方式・手段は、乾燥炉自体の構造が複雑化して製造装
置のコストアップとなり、また、結果として、電池用電
極シートの製造コストアップとなる。すなわち、操作な
どが煩雑化するとともに、電池製品の製造コストアップ
となるので、実用上、十分満足できる手段とはいえな
い。As a measure for productivity of the battery electrode sheet, a method of using an electric infrared heater in combination with hot air drying,
Alternatively, a hot air flow system using a hot air blowing nozzle with high accuracy has been proposed. However, these methods and means complicate the structure of the drying furnace itself and increase the cost of the manufacturing apparatus, and as a result, the manufacturing cost of the battery electrode sheet. That is, the operation becomes complicated and the production cost of the battery product increases, so that it cannot be said that it is a practically satisfactory means.

【０００８】本発明は、上記事情に鑑みてなされたもの
で、低コスト化を図りながら、電極シートの乾燥を効率
よく、かつ安全に行える電池用電極シートの製造方法、
および製造装置の提供を目的とする。The present invention has been made in view of the above circumstances, and provides a method of manufacturing an electrode sheet for a battery, which can efficiently and safely dry an electrode sheet while reducing costs.
And production equipment.

【０００９】[0009]

【課題を解決するための手段】請求項１の発明は、一定
方向に走行するテープ状支持体の主面にペースト状電極
合剤を塗工する工程と、前記ペースト状電極合剤の塗工
面にトンネル型乾燥炉内で熱風を吹き付け、かつテープ
状支持体の走行方向に熱風を排気してペースト状電極合
剤を乾燥する工程とを有し、前記熱風の吹き付け後に熱
風速度を一時的に増速させることを特徴とする電池用電
極シートの製造方法。A first aspect of the present invention is a step of applying a paste-like electrode mixture to a main surface of a tape-like support running in a predetermined direction, and a step of applying the paste-like electrode mixture. Blowing hot air in a tunnel-type drying furnace, and exhausting hot air in the traveling direction of the tape-shaped support to dry the paste-like electrode mixture, and temporarily changing the hot air speed after the blowing of the hot air. A method for producing an electrode sheet for a battery, comprising increasing the speed.

【００１０】請求項２の発明は、テープ状支持体を一定
方向に走行させる走向ローラと、前記テープ状支持体を
挿通・走向させ、テープ状支持体主面にペースト状電極
合剤を塗工するペースト状電極合剤容器と、前記テープ
状支持体の走行方向に配置され、塗工されたペースト状
電極合剤量を制御する塗工量制御手段と、前記塗工量を
制御されたテープ状支持体が走行する乾燥用のトンネル
型乾燥炉とを有する製造装置であって、前記トンネル型
乾燥炉は、走向するテープ状支持体の電極合剤塗工面に
熱風を吹き付ける熱風吹き出しノズルを有する第１の領
域と、前記第１の領域に連接して狭窄部化し、熱風速度
を増速させるオリフイス構造を有する第２の領域と、前
記第２の領域に連接し、増速された熱風速度を低減化す
る一方、熱風を排気する熱風排気口を有する第３の領域
とを具備した構成を採っていることを特徴とする電池用
電極シートの製造装置である。A second aspect of the present invention provides a running roller for running the tape-shaped support in a fixed direction, a tape-shaped support being inserted and running, and a paste-shaped electrode mixture coated on the main surface of the tape-shaped support. Paste electrode mixture container to be disposed, disposed in the running direction of the tape-shaped support, a coating amount control means for controlling the amount of coated paste electrode mixture, and a tape in which the coating amount is controlled A tunnel-type drying furnace for drying in which the support is running, wherein the tunnel-type drying furnace has a hot-air blowing nozzle that blows hot air onto the electrode mixture coating surface of the running tape-shaped support. A first region, a second region having an orifice structure connected to the first region to form a constricted portion and increase the speed of hot air, and a hot air speed connected to the second region and increased in speed. While reducing hot air It is a manufacturing apparatus of electrode sheet for a battery, characterized in that adopts a configuration provided with the third region having a hot air outlet to.

【００１１】請求項１および２の発明は、トンネル型の
乾燥炉内を走向する過程で電極活物質の塗工面に、熱風
を吹き付け、かつ熱風のフローによって塗工層を乾燥さ
せるに当たり、前記走向領域の一部で熱風の速度を増速
させることを骨子としている。すなわち、請求項１およ
び２の発明は、電極活物質塗工層の乾燥に作用する熱風
フローに、間欠的な速度差を付けた場合、定常的ないし
一様な熱風フローの場合に較べて、前記乾燥作用の効率
化が容易に図られるとの知見に基づいたものである。According to the first and second aspects of the present invention, when the hot air is blown onto the coating surface of the electrode active material in the process of running in the tunnel type drying furnace and the coating layer is dried by the flow of the hot air, the running is performed. The main point is to increase the speed of hot air in a part of the area. That is, the invention according to claims 1 and 2 is characterized in that, when an intermittent speed difference is applied to the hot air flow acting to dry the electrode active material coating layer, compared with the case of a steady or uniform hot air flow, This is based on the finding that the efficiency of the drying action can be easily improved.

【００１２】請求項１および２の発明は、電極活物質塗
工層の乾燥手段を除けば、基本的に、従来の手段・構成
と同様といえる。つまり、請求項１および２の発明で
は、電極活物質を塗工した後の乾燥手段が、熱風の吹き
付け領域と、吹き付けた熱風速度を増速する領域と、熱
風を増速速度から解放する領域とに意識的に分けられ
る。The inventions of claims 1 and 2 can be said to be basically the same as the conventional means and configuration except for the means for drying the electrode active material coating layer. In other words, according to the first and second aspects of the present invention, the drying means after the application of the electrode active material comprises a hot air blowing region, a region for increasing the speed of the blown hot air, and a region for releasing the hot air from the speed increasing speed. And consciously divided into

【００１３】より具体的には、電極活物質を塗工した支
持体を走向させるトンネル型乾燥炉は、第１の領域（熱
風の吹き付け領域）、第２の領域（吹き付けた熱風速度
を増速する領域）、および第３の領域（熱風を増速速度
から解放ないし低減化する領域）で構成される。ここ
で、第１および第３の領域は、いずれも電極活物質を塗
工した支持体が走向する空間の断面を、たとえば矩形な
いしそれに類似した形状にし、かつこの空間部が一定の
長さに設定される。なお、第１の領域には、走向路を成
す空間に所要の熱風を吹き出す（吹き付ける）ノズルが
設置され、第３の領域には、走向路を成す空間の熱風流
を排気する排気口が設置されている。More specifically, a tunnel-type drying furnace in which a support coated with an electrode active material runs is provided with a first region (a region where hot air is blown) and a second region (where the speed of the blown hot air is increased). And a third region (a region where hot air is released or reduced from the speed increase speed). Here, each of the first and third regions has a cross section of a space where the support coated with the electrode active material runs, for example, a rectangular or similar shape, and this space has a predetermined length. Is set. In the first area, a nozzle for blowing (spraying) a required hot air into a space forming the runway is installed, and in the third area, an exhaust port for exhausting a hot airflow in the space forming the runway is installed. Have been.

【００１４】また、前記第１および第３の領域を連接す
る第２の領域は、一端側の空間断面が前記第１の領域に
連接するため同形であるが、２５〜４０度程度のテーパ
ーで空間断面は縮径（狭窄）される。つまり、第２の領
域は、被乾燥体の走向速度や熱風量などを考慮して適度
にテーパー付けされ、所要の加速を図れるオリフイス構
造として機能する構成を採っている。そして、この空間
断面縮径部（狭窄部）も所要の長さに設定されている。
一方、他端側空間断面は、前記と同様のテーパー付きで
広大化され、第３の領域に連接する。The second region connecting the first and third regions has the same shape because the space section at one end is connected to the first region, but has a taper of about 25 to 40 degrees. The space cross section is reduced in diameter (narrowed). In other words, the second region is appropriately tapered in consideration of the running speed of the object to be dried, the amount of hot air, and the like, and has a configuration that functions as an orifice structure capable of achieving required acceleration. The reduced diameter section (narrowed section) of the space is also set to a required length.
On the other hand, the other end side space cross section is enlarged with the same taper as described above, and is connected to the third region.

【００１５】請求項１および請求項２で使用するテープ
状の支持体（集電体）は、負極系の場合、金属箔テープ
類、また、正極系の場合、金属製多孔質テープ類や繊維
状テープ類などである。さらに、ペースト状電極活物質
合剤は、対応する活物質、たとえば水素吸蔵合金などの
負極活物質、もしくは水酸化ニッケルなどの正極活物質
を含有するものである。そして、これらテープ状の支持
体の厚さや幅、電極活物質合剤の塗工量などは、電池の
種類や容量などによって選択・設定する。The tape-shaped support (current collector) used in the first and second aspects is a metal foil tape in the case of a negative electrode, and a metal porous tape or fiber in the case of a positive electrode. Tapes and the like. Further, the paste-like electrode active material mixture contains a corresponding active material, for example, a negative electrode active material such as a hydrogen storage alloy, or a positive electrode active material such as nickel hydroxide. The thickness and width of the tape-shaped support, the coating amount of the electrode active material mixture, and the like are selected and set according to the type and capacity of the battery.

【００１６】請求項１の発明では、一定方向に走行する
テープ状支持体の電極合剤塗工面に熱風を吹き付け、か
つその走行方向に熱風を排気する過程で電極合剤を乾燥
するに当たり、熱風は、吹き付け後に熱風速度が加速
（増速）され、その後、加速状態が解放さる（原状に戻
される）。つまり、加熱乾燥は、中間時、一時的に急速
ないし強力な加熱処理が施される形態を採るため、効率
的な乾燥処理が進行する。しかも、加熱・乾燥に作用す
る熱風流は、段階的に定速−増速−定速となっているた
め、電極活物質などに対する熱的な影響も緩和される。According to the first aspect of the present invention, hot air is blown onto the electrode mixture coated surface of the tape-shaped support running in a certain direction, and the hot air is exhausted in the running direction. After the spraying, the hot air velocity is accelerated (increased), and then the accelerated state is released (returned to the original state). That is, the heating and drying takes a form in which a rapid or strong heat treatment is temporarily performed during the intermediate period, so that the efficient drying process proceeds. In addition, since the hot air flow acting on the heating / drying has a constant speed-increase-constant speed in a stepwise manner, the thermal effect on the electrode active material and the like is reduced.

【００１７】請求項２の発明では、一定方向に走行する
テープ状支持体の電極合剤塗工面の加熱乾燥は、中間
時、一時的に急速ないし強力な加熱処理が施される形態
を自動的に採るため、効率的な乾燥処理を進める。しか
も、加熱・乾燥に作用する熱風流は、自動的に、定速−
増速−定速となるため、電極活物質などに対する熱的な
影響も緩和される。According to the second aspect of the present invention, the heating and drying of the electrode mixture-coated surface of the tape-shaped support running in a certain direction is performed automatically in a mode in which a rapid or strong heat treatment is temporarily performed. To promote efficient drying. In addition, the hot air flow that acts on heating and drying automatically
Since the speed is increased-constant, the thermal influence on the electrode active material and the like is reduced.

【００１８】[0018]

【発明の実施形態】以下、実施例に係る電池用電極シー
ト製造装置の要部構成を示す図１および図２を参照して
実施例を説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described below with reference to FIGS. 1 and 2 which show a main part of a device for manufacturing an electrode sheet for a battery according to the embodiment.

【００１９】実施例に係る電池用電極シートの製造装置
は、前記図３に図示した場合と基本的な点で同様な構成
を採っている。すなわち、図３に示すように、基本的に
は、テープ状支持体２を一定方向に走行させる走向ロー
ラ（上、下ローラ）１ａ、１ｂと、前記テープ状支持体
２を挿通・走向させ、テープ状支持体２の両主面にペー
スト状電極合剤４を塗工するペースト状電極合剤容器３
と、前記テープ状支持体２の走行方向に配置され、塗工
されたペースト状電極合剤量を制御する塗工量制御手段
５（たとえば一定間隔を持たせて一対のスリット部材を
対向配置して成るスリット機構）と、トンネル型乾燥炉
６とを備えている。The apparatus for manufacturing an electrode sheet for a battery according to the embodiment has the same basic configuration as that shown in FIG. That is, as shown in FIG. 3, basically, running rollers (upper and lower rollers) 1a and 1b for running the tape-shaped support 2 in a fixed direction and the tape-shaped support 2 are inserted and run, Paste electrode mixture container 3 for applying paste electrode mixture 4 to both main surfaces of tape-like support 2
And a coating amount control means 5 arranged in the running direction of the tape-shaped support member 2 for controlling the amount of the coated paste-like electrode mixture (for example, a pair of slit members are arranged opposite to each other with a certain interval. And a tunnel type drying furnace 6.

【００２０】この実施例に係る電池用電極シートの製造
装置は、前記ペースト状電極合剤４の塗工量を制御され
たテープ状支持体２′が、乾燥処理のため走行する乾燥
用のトンネル型炉の構成に大きな相違点がある。すなわ
ち、図３における乾燥用のトンネル型炉６の代りに、図
１に斜視的に、また、図２に縦断面的に示すような構成
を採ったトンネル型炉を使用する点で特徴付けられる。In the apparatus for manufacturing a battery electrode sheet according to this embodiment, a drying tunnel in which a tape-like support 2 ′ whose coating amount of the paste-like electrode mixture 4 is controlled runs for drying processing. There are major differences in the configuration of the mold furnace. That is, it is characterized in that, instead of the drying tunnel furnace 6 in FIG. 3, a tunnel furnace having a configuration shown in a perspective view in FIG. 1 and a longitudinal section in FIG. 2 is used. .

【００２１】図１および図２において、９はトンネル型
乾燥炉で、第１の領域（熱風の吹き付け領域）９ａ、第
２の領域（吹き付けた熱風速度を増速する領域）９ｂ、
および第３の領域（熱風を増速速度から解放する領域）
９ｃで構成される。ここで、第１および第３の領域９
ａ、９ｃは、いずれも電極活物質を塗工した支持体が走
向する空間の断面が１５ｘ８０ｃｍ程度の矩形で、かつ
この空間部の長さを５０〜１５０ｃｍ程度に設定されて
いる。In FIGS. 1 and 2, reference numeral 9 denotes a tunnel-type drying furnace, which includes a first region (a region for blowing hot air) 9a, a second region (a region for increasing the speed of blowing hot air) 9b,
And third area (area for releasing hot air from acceleration speed)
9c. Here, the first and third regions 9
In each of a and 9c, the cross section of the space in which the support coated with the electrode active material runs is a rectangle of about 15 × 80 cm, and the length of this space is set to about 50 to 150 cm.

【００２２】また、前記第１の領域９ａおよび第３の領
域９ｃを連接する第２の領域９ｂは、一端側の空間断面
が１５ｘ８０ｃｍ程度の矩形で、約３０度程度のテーパ
ーで空間断面は１０ｘ８０ｃｍ程度の矩形に縮径（狭
窄）９ｂ′されている。つまり、第２の領域９ｂは、オ
リフイス構造としての機能を呈する構成を採っている。
ここで、この空間断面縮径部（狭窄部）９ｂ′は、長さ
５０〜１５０ｃｍ程度に設定されている。なお、第１の
領域９ａには、走向路を成す空間に所要の熱風を吹き出
す（吹き付ける）ノズル１０ａ、１０ｂが、第３の領域
９ｃには、図示を省略してあるが、走向路を成す空間の
熱風流を排気する排気口が（図３に準じて）、それぞれ
設置されている。The second region 9b connecting the first region 9a and the third region 9c has a rectangular cross section at one end of about 15 × 80 cm, a taper of about 30 ° and a spatial cross section of 10 × 80 cm. The diameter (constriction) 9b 'is reduced to a rectangular shape. That is, the second region 9b has a configuration exhibiting a function as an orifice structure.
Here, the space cross-section reduced diameter portion (constriction portion) 9b 'is set to have a length of about 50 to 150 cm. In the first region 9a, nozzles 10a and 10b for blowing (spraying) required hot air into a space forming the runway are formed, and in the third region 9c, although not shown, the nozzle forms the runway. An exhaust port for exhausting the hot air flow in the space (according to FIG. 3) is provided.

【００２３】次ぎに、上記製造装置による電池用電極シ
ートの製造例を説明する。Next, an example of manufacturing a battery electrode sheet by the above manufacturing apparatus will be described.

【００２４】たとえば厚さ０．０１ｍｍ程度、幅５００
ｍｍ程度のテープ状支持体（金属箔）２を走向ローラ
（上、下ローラ）１ａ、１ｂによって、一定方向に走行
するようにセットする。なお、このテープ状支持体２の
セットに当たっては、ペースト状電極合剤容器内３を挿
通・走向させる。その後、前記テープ状支持体２を挿通
・走向させた状態で、ペースト状電極合剤容器３内に、
ペースト状電極合剤（水素吸蔵金属を活物質として含
む）４を充填し、このペースト状電極合剤４中の通過段
階で、テープ状支持体２の両主面にペースト状電極合剤
４を塗工する。For example, a thickness of about 0.01 mm and a width of 500
A tape-like support (metal foil) 2 of about mm is set to run in a fixed direction by running rollers (upper and lower rollers) 1a and 1b. When the tape-shaped support 2 is set, the paste-shaped electrode mixture container 3 is inserted and run. Then, in a state where the tape-like support 2 is inserted and run, the paste-like electrode mixture container 3 is
The paste-like electrode mixture (containing a hydrogen storage metal as an active material) 4 is filled, and the paste-like electrode mixture 4 is applied to both main surfaces of the tape-shaped support 2 during the passage through the paste-like electrode mixture 4. Apply.

【００２５】前記ペースト状電極合剤４が塗工されたテ
ープ状支持体２′は、その走行方向に配置された塗工量
制御手段５において、塗工されたペースト状電極合剤量
が制御された後、トンネル型乾燥炉９内を走向して、所
要の乾燥処理が施される。The amount of the paste-like electrode mixture applied to the tape-like support 2 'on which the paste-like electrode mixture 4 has been applied is controlled by an application amount control means 5 arranged in the running direction. After that, a required drying process is performed while traveling in the tunnel type drying furnace 9.

【００２６】すなわち、前記塗工量が制御されたテープ
状支持体２′は、先ず、トンネル型乾燥炉９の第１の領
域９ａで、熱風吹き出しノズル１０ａ、１０ｂから、揺
れなどを生じないように予めバランス調整した乾燥用熱
風の吹き付けが行われる。その後に、第２の領域９ｂに
おいて、前記吹き付けられた熱風は、狭窄部９ｂ′によ
る絞り作用で熱風速度が加速ないし増速され、ペースト
状電極合剤４の塗工面の乾燥を効率的に進めながら、第
３の領域９ｃ側に流れる。That is, the tape-like support 2 ′ whose coating amount is controlled is first controlled so that the hot-air blowing nozzles 10 a and 10 b do not shake in the first region 9 a of the tunnel type drying furnace 9. Of hot air for drying, the balance of which is adjusted in advance. Thereafter, in the second region 9b, the blown hot air is accelerated or increased in speed by the squeezing action of the constricted portion 9b ', and the drying of the coated surface of the paste electrode mixture 4 is efficiently advanced. While flowing to the third region 9c side.

【００２７】加速状態で第２の領域９ｂ通過する熱風
は、第３の領域９ｃ側の逆テーパー面で減速される。つ
まり、第３の領域９ｃでは、熱風速度が第１の領域９ａ
における速度に戻され（増速速度から解放）、乾燥処理
が最終的な段階に入る。この間、トンネル型乾燥炉９内
においては、一定の方向に走向・移動するペースト状電
極合剤４の塗工面が、定速的な熱風流に曝され、引き続
いて高速ないし加速的な熱風流に曝され、さらに、定速
的な熱風流に曝される。The hot air passing through the second region 9b in the accelerated state is decelerated on the reverse tapered surface on the third region 9c side. That is, in the third region 9c, the hot air velocity is reduced to the first region 9a.
(Released from the speed increase speed), and the drying process enters the final stage. During this time, in the tunnel type drying furnace 9, the coated surface of the paste-like electrode mixture 4 that runs and moves in a fixed direction is exposed to a constant-speed hot air flow, and subsequently, a high-speed or accelerated hot air flow. Exposed to a constant velocity hot air stream.

【００２８】つまり、トンネル型乾燥炉９内において、
相対的に弱・強・弱の熱風に曝される段階を経ること、
および塗工されたペースト状電極合剤中の揮発成分もス
ムースに揮散・排除されことなどに伴って、加熱・乾燥
処理は、効率的に進められる。たとえば、トンネル型乾
燥炉９の構成を、全体的に第１の領域９ａを延長させた
構成とした場合と比較して、品質が同等の電池用電極シ
ートを製造する速度は、約２倍であり、生産性の大幅な
向上が確認された。That is, in the tunnel type drying furnace 9,
Going through relatively weak / strong / weak hot air,
The heating / drying process can be efficiently performed with the volatile components in the applied paste-like electrode mixture being smoothly volatilized and eliminated. For example, as compared with the case where the configuration of the tunnel type drying furnace 9 is configured to extend the first region 9a as a whole, the speed of manufacturing the battery electrode sheet having the same quality is about twice as high. There was a significant increase in productivity.

【００２９】本発明は、上記実施例に限定されるもので
なく、発明の趣旨を逸脱しない範囲でいろいろの変形を
採ることができる。たとえばトンネル型乾燥炉における
第１の領域、第２の領域、および第３の領域の各中空断
面の形状・寸法、それらの長さ、あるいは対象となる電
池用電極シートの種類など、適宜設定することができ
る。The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the invention. For example, the shapes and dimensions of the hollow sections of the first region, the second region, and the third region in the tunnel type drying furnace, their lengths, and the type of the target electrode sheet for the battery are appropriately set. be able to.

【００３０】[0030]

【発明の効果】請求項１の発明によれば、電極合剤が塗
工されたテープ状支持体の加熱乾燥は、中間時、一時的
に急速ないし強力な加熱処理が施される形態を採るため
効率的ないし生産性の高い乾燥処理を行える。しかも、
加熱・乾燥に作用する熱風流は、段階的に定速−増速−
定速となっているため、電極活物質などに対する熱的な
影響も緩和され、高品質な電池用電極シートを歩留まり
よく製造できる。According to the first aspect of the present invention, the heating and drying of the tape-shaped support coated with the electrode mixture takes a form in which a rapid or strong heat treatment is temporarily performed during the intermediate period. Therefore, the drying process can be performed efficiently or with high productivity. Moreover,
The flow of hot air acting on heating and drying is gradually increased at a constant speed.
Since the speed is constant, the thermal influence on the electrode active material and the like is reduced, and a high-quality battery electrode sheet can be manufactured with high yield.

【００３１】請求項２の発明によれば、テープ状支持体
に塗工した電極合剤の加熱乾燥は、中間時、一時的に急
速ないし強力な加熱処理が施される形態を自動的に採る
ため、効率的ないし生産性の高い乾燥処理を行える。し
かも、加熱・乾燥に作用する熱風流は、自動的に、定速
−増速−定速となるため、電極活物質などに対する熱的
な影響も緩和され、高品質な電池用電極シートを歩留ま
りよく製造できる。According to the second aspect of the present invention, the heating and drying of the electrode mixture applied to the tape-shaped support automatically takes a form in which a rapid or strong heat treatment is temporarily performed during the intermediate period. Therefore, the drying process can be performed efficiently or with high productivity. In addition, since the hot air flow acting on heating and drying automatically becomes constant speed-increase-constant speed, the thermal influence on the electrode active material and the like is reduced, and the yield of the high quality battery electrode sheet is reduced. Can be manufactured well.

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

【図１】実施例に係る電池用電極シートの製造装置の要
部構成を示す斜視図。FIG. 1 is a perspective view showing a main configuration of an apparatus for manufacturing a battery electrode sheet according to an embodiment.

【図２】実施例に係る電池用電極シートの製造装置の要
部構成を示す縦断面図。FIG. 2 is a longitudinal sectional view showing a configuration of a main part of an apparatus for manufacturing a battery electrode sheet according to an example.

【図３】従来の電池用電極シートの製造装置の要部構成
を示す縦断面図。FIG. 3 is a longitudinal sectional view showing the configuration of a main part of a conventional apparatus for manufacturing a battery electrode sheet.

【符号の説明】 １ａ、１ｂ……走向ローラ ２……テープ状支持体 ２……活物質塗工のテープ状支持体 ３……ペースト状活物質合剤用容器 ４……ペースト状活物質合剤 ５……活物質塗工量制御手段 ６、９……トンネル型乾燥炉 ７ａ、７ｂ……熱風吹き出し口 ８ａ、８ｂ……熱風排出口 ９ａ……熱風流吹き付け領域 ９ｂ′……熱風流増速解放領域 ９ｃ……熱風流増速解放領域 １０ａ、１０ｂ……熱風吹き出しノズルDESCRIPTION OF SYMBOLS 1a, 1b ... Running roller 2 ... Tape-like support 2 ... Tape-like support for active material coating 3 ... Container for paste-like active material mixture 4 ... Paste-like active material Agent 5: Active material coating amount control means 6, 9, Tunnel type drying furnace 7a, 7b Hot air outlet 8a, 8b Hot air outlet 9a Hot air flow blowing area 9b ': Hot air flow increase Fast release area 9c Hot air flow speed increase release area 10a, 10b Hot air blowing nozzle

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 一定方向に走行するテープ状支持体の主
面にペースト状電極合剤を塗工する工程と、 前記ペースト状電極合剤の塗工面にトンネル型乾燥炉内
で熱風を吹き付け、かつテープ状支持体の走行方向に熱
風を排気してペースト状電極合剤を乾燥する工程とを有
し、 前記熱風の吹き付け後に熱風速度を一時的に増速させる
ことを特徴とする電池用電極シートの製造方法。1. A step of applying a paste-like electrode mixture to a main surface of a tape-like support running in a fixed direction, and blowing hot air in a tunnel-type drying furnace on a coating surface of the paste-like electrode mixture; And drying the paste-like electrode mixture by exhausting hot air in the running direction of the tape-like support, and temporarily increasing the speed of the hot air after blowing the hot air. Sheet manufacturing method. 【請求項２】 テープ状支持体を一定方向に走行させる
走向ローラと、前記テープ状支持体を挿通・走向させ、
テープ状支持体主面にペースト状電極合剤を塗工するペ
ースト状電極合剤容器と、前記テープ状支持体の走行方
向に配置され、塗工されたペースト状電極合剤量を制御
する塗工量制御手段と、前記塗工量を制御されたテープ
状支持体が走行する乾燥用のトンネル型乾燥炉とを有す
る製造装置であって、前記トンネル型乾燥炉は、走向す
るテープ状支持体の電極合剤塗工面に熱風を吹き付ける
熱風吹き出しノズルを有する第１の領域と、前記第１の
領域に連接して狭窄部化し、熱風速度を増速させるオリ
フイス構造を有する第２の領域と、前記第２の領域に連
接し、増速された熱風速度を下げる一方、熱風を排気す
る熱風排気口を有する第３の領域とを具備した構成を採
っていることを特徴とする電池用電極シートの製造装
置。2. A running roller for running the tape-shaped support in a fixed direction, and a tape-shaped support being inserted and run,
A paste-like electrode mixture container for applying a paste-like electrode mixture to the main surface of the tape-like support; and a coating material disposed in the running direction of the tape-like support to control the amount of the paste-like electrode mixture. A manufacturing apparatus having a work amount control unit and a tunnel-type drying furnace for drying in which the tape-shaped support whose coating amount is controlled travels, wherein the tunnel-type drying furnace includes a running tape-shaped support. A first region having a hot air blowing nozzle for blowing hot air onto the electrode mixture coated surface of the first region, and a second region having an orifice structure connected to the first region to form a constricted portion and increase the speed of the hot air, An electrode sheet for a battery, comprising: a third region connected to the second region and having a hot air exhaust port for discharging hot air while reducing the increased hot air velocity. Manufacturing equipment.
JP2000276103A 2000-09-12 2000-09-12 Manufacturing method and device for battery electrode sheet Pending JP2002093407A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000276103A JP2002093407A (en) 2000-09-12 2000-09-12 Manufacturing method and device for battery electrode sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000276103A JP2002093407A (en) 2000-09-12 2000-09-12 Manufacturing method and device for battery electrode sheet

Publications (1)

Publication Number Publication Date
JP2002093407A true JP2002093407A (en) 2002-03-29

Family

ID=18761625

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000276103A Pending JP2002093407A (en) 2000-09-12 2000-09-12 Manufacturing method and device for battery electrode sheet

Country Status (1)

Country Link
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004042847A1 (en) * 2002-11-08 2004-05-21 Nilar International Ab An apparatus for manufacturing an electrode
US9431676B2 (en) 2002-11-08 2016-08-30 Nilar International Ab Electrode, method for manufacturing electrode, biplate assembly and bipolar battery
CN107826657A (en) * 2017-12-04 2018-03-23 深圳市鹏翔运达机械科技有限公司 Lithium battery tunnel type automatic drying line

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004042847A1 (en) * 2002-11-08 2004-05-21 Nilar International Ab An apparatus for manufacturing an electrode
US9431676B2 (en) 2002-11-08 2016-08-30 Nilar International Ab Electrode, method for manufacturing electrode, biplate assembly and bipolar battery
US9548488B2 (en) 2002-11-08 2017-01-17 Nilar International Ab Method for manufacturing electrode
CN107826657A (en) * 2017-12-04 2018-03-23 深圳市鹏翔运达机械科技有限公司 Lithium battery tunnel type automatic drying line
CN107826657B (en) * 2017-12-04 2023-10-27 深圳市鹏翔运达机械科技有限公司 Tunnel type automatic drying line for lithium battery

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