JP2578649B2 - Method and apparatus for manufacturing battery electrode - Google Patents
Method and apparatus for manufacturing battery electrodeInfo
- Publication number
- JP2578649B2 JP2578649B2 JP63189101A JP18910188A JP2578649B2 JP 2578649 B2 JP2578649 B2 JP 2578649B2 JP 63189101 A JP63189101 A JP 63189101A JP 18910188 A JP18910188 A JP 18910188A JP 2578649 B2 JP2578649 B2 JP 2578649B2
- Authority
- JP
- Japan
- Prior art keywords
- substrate
- slurry
- filling
- roller
- relative speed
- 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.)
- Expired - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0409—Methods of deposition of the material by a doctor blade method, slip-casting or roller coating
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0416—Methods of deposition of the material involving impregnation with a solution, dispersion, paste or dry powder
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/043—Processes of manufacture in general involving compressing or compaction
- H01M4/0435—Rolling or calendering
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/24—Electrodes for alkaline accumulators
- H01M4/26—Processes of manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/24—Electrodes for alkaline accumulators
- H01M4/32—Nickel oxide or hydroxide electrodes
-
- 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
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Dispersion Chemistry (AREA)
- Battery Electrode And Active Subsutance (AREA)
Description
【発明の詳細な説明】 (イ) 産業上の利用分野 本発明はアルカリ蓄電池等に使用される、三次元的な
連通孔を有する金属多孔体を基体として用いる電池用電
極の製造方法、及びその装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION (a) Industrial application field The present invention relates to a method for producing a battery electrode using a porous metal body having three-dimensional communication holes as a base, which is used for an alkaline storage battery and the like, and its production method. It concerns the device.
(ロ) 従来の技術 密閉式アルカリ蓄電池等に用いられる電極の製造方法
として、近年、焼結式に代って、三次元的な連通孔を有
する金属多孔体に活物質粉末を充填して作られる非焼結
式製法が研究されている。この製造方法は、製造工程が
簡略化されるとともに製造所要時間も短縮でき、さらに
電極の高エネルギー密度化も容易なことから、コスト低
減、性能向上に有効な製造方法とみなされている。(B) Conventional technology As a method of manufacturing an electrode used in a sealed alkaline storage battery or the like, in recent years, instead of a sintering method, an active material powder has been filled in a porous metal body having three-dimensional communication holes. Non-sintering processes have been studied. This manufacturing method is regarded as an effective manufacturing method for cost reduction and performance improvement because the manufacturing process can be simplified, the manufacturing time can be shortened, and the energy density of the electrode can be easily increased.
この代表的な製造方法は、具体的には次の様な工程に
よるものである。ニツケル繊維のフエルト状結晶体(以
下ニツケルマツトと称する、繊維径20μm、平均孔径50
μm、多孔度93%の物性を有するもの)を基体として用
い、これに平均粒径20μmの水酸化ニツケル粉末を主体
とする活物質粉末と糊料液とを混合して調製したスラリ
ーを充填し、乾燥後、加圧圧縮して完成電極とするもの
である。This typical manufacturing method is specifically based on the following steps. Felt-like crystal of nickel fiber (hereinafter referred to as nickel matte, fiber diameter 20 μm, average pore diameter 50)
μm, having a physical property of porosity of 93%) as a substrate, and then filling a slurry prepared by mixing an active material powder mainly composed of nickel hydroxide powder having an average particle diameter of 20 μm with a paste liquid. After drying, compression is performed to obtain a completed electrode.
ところで、このニツケルマツトは本来フイルターとし
て開発されたものであるため、活物質スラリーを充填す
る際に、液体だけが内部に入り、活物質粉末がニツケル
マツト表面で過されて、所期必要量の活物質が充填で
きないという不都合が生じる。この欠点を改良するた
め、特公昭59−31832号公報、同59−24492号公報、同56
−37665号公報、特開昭59−81868号公報、同59−143270
号公報等の提案がなされた。前3者は、基体の上表面の
摺り具によって供給されるスラリーを機械的に摺り込も
うとするものであるが、装置の構成が複雑である上、充
填量の均一化が難しいという問題点がある。後2者はス
ラリーを空気とともに基体に吹き付けてその圧力で充填
しようというものであるが、高圧を用いるため十分剛性
のある基体でなければ耐えられない。また空気を一緒に
充填することになるため、充填量が少くなりまた定量性
が得にくいなどの難点がある。By the way, since this nickel matte was originally developed as a filter, when the active material slurry was filled, only the liquid entered the inside, the active material powder was passed over the nickel matte surface, and the required amount of the active material was Disadvantageously cannot be filled. In order to improve this disadvantage, Japanese Patent Publication Nos. 59-31832, 59-24492 and 56
-37665, JP-A-59-81868, JP-A-59-143270
And other proposals. The former three are intended to mechanically rub the slurry supplied by the rubbing tool on the upper surface of the substrate, but have the problems that the configuration of the apparatus is complicated and that the filling amount is difficult to equalize. There is. In the latter two, the slurry is sprayed onto the substrate together with air to fill the substrate with the pressure. However, since high pressure is used, the substrate cannot be used unless the substrate is sufficiently rigid. In addition, since air is filled together, the amount of filling is small, and it is difficult to obtain quantitative properties.
(ハ) 発明が解決しようとする課題 本発明は前記問題点に鑑みなされたものであって、三
次元的な連通孔を有する金属多孔体からなる基体に、ス
ラリー状の活物椎を充填するに際して、電極製造工程上
効率良く、高い充填率で、しかも均一に充填することに
より、諸特性に優れた電池用電極を提供する電池用電極
の製造方法、及びその装置を提案するものである。(C) Problems to be Solved by the Invention The present invention has been made in view of the above-mentioned problems, and fills a slurry-like active material vertebra into a base made of a porous metal body having three-dimensional communication holes. In this regard, the present invention proposes a battery electrode manufacturing method and a device for providing a battery electrode having excellent various characteristics by efficiently filling the electrode at a high filling rate and uniformly in the electrode manufacturing process.
(ニ) 課題を解決するための手段 本発明の電池用電極の製造方法は、三次元的に連続す
る空孔を有する金属多孔体を基体とし、連続的に供給さ
れる該基体の空孔内に活物質粉末を主成分とするスラリ
ーを充填する方法であって、前記スラリーを満たした槽
と、該槽のスラリー内に少なくとも一部浸漬するが完全
には没しない位置にローラーを設置し、前記ローラーの
スラリー内に没していない少なくとも一点で接するよう
に前記基体を導き、前記ローラーを移動せる前記基体に
対し十分に速い相対速度をもつように回転させ、前記ス
ラリーを基体に充填することを特徴とするものである。
また本発明に用いるスラリーは、ニユートン流動を示す
粘性流体を用いるのが好ましく、その粘度としては1000
〜10000cpが適する。更に、ローラー表面の基体に対す
る相対速度は、基体の移動速度の3倍以上とするのが良
い。(D) Means for Solving the Problems The method for producing a battery electrode of the present invention is based on a method in which a porous metal body having three-dimensionally continuous pores is used as a base, and the pores of the base are continuously supplied. A method of filling a slurry containing the active material powder as a main component, a tank filled with the slurry, and a roller is installed at a position at least partially immersed in the slurry of the tank but not completely immersed, Guiding the substrate so as to be in contact with at least one point not submerged in the slurry of the roller, rotating the roller so as to have a sufficiently high relative speed to the moving substrate, and filling the substrate with the slurry. It is characterized by the following.
Further, the slurry used in the present invention is preferably a viscous fluid exhibiting Newtonian flow, the viscosity of which is 1000
~ 10000cp is suitable. Further, the relative speed of the roller surface to the substrate is preferably at least three times the moving speed of the substrate.
一方本発明の電池用電極の製造装置は、三次元的に連
続する空孔を有する金属多孔体を基体とし、連続的に供
給される該基体の空孔内に活物質粉末を主成分とするス
ラリーを充填する装置であって、前記基体を連続的に供
給する手段と、前記スラリーを満たした槽と、前記スラ
リーを前記基体に充填する充填ローラーと、不用な付着
スラリーを前記基体より除去するスクレパーと、前記充
填ローラーを回転駆動させる駆動装置とを備え、前記充
填ローラーは前記槽のスラリー内に少なくとも一部浸漬
するが完全には没しない位置に配置されると共に前記槽
のスラリー内に没していない少なくとも一点で前記基体
に接しており、前記駆動装置は前記充填ローラーを移動
せる前記基体に対し十分に速い相対速度をもつように回
転させることを特徴とするものである。ここで、充填ロ
ーラー表面の基体に対する相対速度は、基体の移動速度
の3倍以上とするのが良い。加えて、充填ローラーの外
周面には、回転方向に対し直角に掘られた複数の溝を形
成するのが好ましい。On the other hand, the apparatus for manufacturing a battery electrode according to the present invention is based on a porous metal body having three-dimensionally continuous pores as a base, and mainly containing an active material powder in pores of the base which are continuously supplied. An apparatus for filling a slurry, a means for continuously supplying the substrate, a tank filled with the slurry, a filling roller for filling the substrate with the slurry, and removing unnecessary adhered slurry from the substrate. A scraper and a driving device for rotating the filling roller, wherein the filling roller is disposed at a position where it is at least partially immersed in the slurry of the tank but is not completely immersed, and is immersed in the slurry of the tank. The driving device rotates the filling roller so as to have a sufficiently high relative speed to the moving substrate. It is intended to. Here, the relative speed of the surface of the filling roller with respect to the substrate is preferably at least three times the moving speed of the substrate. In addition, it is preferable to form a plurality of grooves dug at right angles to the rotation direction on the outer peripheral surface of the filling roller.
(ホ) 作用 本発明者らは、スラリー状にした水酸化ニツケル粉末
を主成分とする活物質を種々作り、基体への充填性を調
べた。その結果、基体表面での過はスラリーに適当な
量の糊料液を入れるなどして、ニユートン流動を呈する
様に調製することにより、大幅に改良されることが判明
した。これは、液体−粉体の親和性が向上し、分離しに
くくなること、またそれにより基体表面の流動を妨げる
抵抗に、十分抗うだけの流動性を保持し続けるためと考
えられる。(E) Action The present inventors made various active materials containing a nickel hydroxide powder in a slurry form as a main component, and examined filling properties of the active material. As a result, the excess on the surface of the substrate was found to be greatly improved by adjusting the slurry so as to exhibit a Newtonian flow by adding an appropriate amount of paste liquid to the slurry. This is considered to be because the affinity between the liquid and the powder is improved and separation becomes difficult, and the fluidity enough to sufficiently resist the resistance that hinders the flow of the substrate surface is maintained.
しかし、この様なスラリーを使用しても、過性を完
全に防ぐことはできず、スラリー中にデイツプしただけ
の基体表面には、僅かではあるが、含水率の低下したケ
ーキ状のスラリーが付着し、また基体内部にはスラリー
の充填されていない空孔が残ってしまうということが判
った。そして、低含水率のケーキ状スラリーの付着と、
未充填空孔の残留を防ぐには、液体−粉体の分離を生じ
させない様な効率的な補助的充填操作と、基体内部の空
気とスラリーとの置換を効率良く行わせることが重要で
あることが、本発明者による検討で明らかになった。こ
の2要点をクリヤーできる方法について実験を行い、ス
ラリー内に少なくとも一部浸漬するが完全には没しない
位置にローラーを設置し、前記ローラーのスラリー内に
没していない少なくとも一点で接するように基体を導
き、前記ローラーを移動せる前記基体に対し十分に速い
相対速度をもつように回転させ、スラリーを基体に充填
することが最適であることを見い出した。However, even if such a slurry is used, the excess property cannot be completely prevented, and a cake-like slurry having a small but low moisture content is formed on the surface of the substrate which is simply dipped in the slurry. It was found that pores that adhered and that were not filled with slurry remained inside the substrate. And adhesion of a low water content cake slurry,
In order to prevent the remaining of unfilled vacancies, it is important to efficiently carry out the auxiliary filling operation so as not to cause the liquid-powder separation and to efficiently exchange the air inside the substrate with the slurry. This has been clarified by the study by the present inventors. An experiment was conducted on a method capable of clearing these two points. A roller was placed at a position where it was at least partially immersed in the slurry but was not completely immersed, and the substrate was contacted at at least one point not immersed in the slurry of the roller. It has been found that it is optimal to rotate the rollers with a sufficiently high relative speed to the moving substrate and to fill the substrate with the slurry.
そして第1図(a)、(b)に示す装置を開発し、本
発明を完成するに至った。Then, the apparatus shown in FIGS. 1A and 1B was developed, and the present invention was completed.
第1図(a)、(b)はいずれも本発明に係る電池用
電極の製造装置の一実施例であり、第1図中、1は槽、
2はスラリー、3は基体表面に付着した剰余のスラリー
をかき落とすスクレパー、4は反転ローラー、5は充填
ローラー、6は基体、7はガイドローラー、9は駆動ロ
ーラーを、各々示す。ここで、基体6は駆動ローラー9
により矢印方向に引っぱられ、連続的に供給、駆動され
る。そしてこの駆動ローラー9の直径と充填ローラー5
の直径とは、本実施例において略同等としている。その
結果、充填ローラー5の回転速度を、駆動ローラー9の
回転速度の、たとえば4倍とし、基体の移動方向と同一
方向に充填ローラー5を回転させる〔第1図(a)参
照〕と、充填ローラー表面の基体に対する相対速度は、
基体の移動速度を3倍に設定することができる。1 (a) and 1 (b) show an embodiment of a device for manufacturing a battery electrode according to the present invention. In FIG.
Reference numeral 2 denotes a slurry, 3 denotes a scraper for scraping off excess slurry adhering to the substrate surface, 4 denotes a reversing roller, 5 denotes a filling roller, 6 denotes a substrate, 7 denotes a guide roller, and 9 denotes a driving roller. Here, the base 6 is a driving roller 9
Is pulled in the direction of the arrow, and is continuously supplied and driven. The diameter of the driving roller 9 and the filling roller 5
Is substantially equal in this embodiment. As a result, the rotation speed of the filling roller 5 is set to, for example, four times the rotation speed of the driving roller 9, and the filling roller 5 is rotated in the same direction as the moving direction of the base (see FIG. 1A). The relative speed of the roller surface to the substrate is
The moving speed of the substrate can be set three times.
一方、充填ローラー5を基体の移動方向と反対方向に
回転させ〔第1図(b)参照〕、充填ローラー5の回転
速度を、駆動ローラー9の回転速度の2倍とすると、充
填ローラー5表面の基体に対する相対速度は、基体の移
動速度の3倍に相当することになる。On the other hand, when the filling roller 5 is rotated in a direction opposite to the moving direction of the substrate (see FIG. 1B), and the rotation speed of the filling roller 5 is twice the rotation speed of the driving roller 9, the surface of the filling roller 5 is Of the substrate corresponds to three times the moving speed of the substrate.
そして連続的に供給されるこのニツケルマツト等の基
体は、ガイドローラーを介して、スラリー中に没してい
ない充填ローラー上(8)へ導かれる。この充填ローラ
ー5は、十分な量のスラリー中に、少くとも一部は没す
る様に設置し、駆動装置(図示せず)により、設定速度
で基体の移動方向と同一方向に回転するように構成され
ている。この回転により、スラリーは液面より上部では
ローラー表面に膜状になって付着し、基体との接触点8
へ選ばれ、基体へ充填される。ここでは、スラリーは自
らの持つ流動性と、基体の移動速度と、ローラーの周速
度を変えることによって得られる摺り込み作用により、
基体内部へ含水率を変えることなく充填される。また、
この充填法においては、基体が充填ローラー面に接した
点から、ローラー面より離れてスラリー池中に没するま
での間に行われる。したがって充填されるべきスラリー
は、常に下方から供給され上方に押し上げられていくた
め、基体中の空気との置換がスムーズに行え、空孔が残
ることなく均一な充填状態が得られるのである。The substrate, such as nickel matte, which is continuously supplied, is guided via guide rollers onto the filling roller (8) not immersed in the slurry. The filling roller 5 is installed so that at least a part thereof is immersed in a sufficient amount of slurry, and is rotated by a driving device (not shown) at a set speed in the same direction as the moving direction of the substrate. It is configured. Due to this rotation, the slurry adheres in a film form on the roller surface above the liquid surface, and at the contact point 8 with the substrate.
And filled into the substrate. Here, the slurry has its own fluidity, the moving speed of the base, and the sliding action obtained by changing the peripheral speed of the roller,
The substrate is filled without changing the water content. Also,
This filling method is carried out from the point at which the substrate comes into contact with the filling roller surface to the point at which it is separated from the roller surface and submerged in the slurry pond. Therefore, since the slurry to be filled is always supplied from below and pushed upward, the replacement with the air in the substrate can be performed smoothly, and a uniform filling state can be obtained without leaving holes.
ところで、上述の充填法を採る際、充填ローラーの摺
速度と基体の移動速度の関係によって充填状態が変化す
ることが知得された。そこで本発明者らは、両者の相対
速度を変化させた場合の充填量の変化とそのバラツキを
測定した。第2図及び第3図に、その結果を示す。By the way, when the above-mentioned filling method is adopted, it has been found that the filling state changes depending on the relationship between the sliding speed of the filling roller and the moving speed of the substrate. Then, the present inventors measured the change of the filling amount and the variation when the relative speed of both was changed. FIG. 2 and FIG. 3 show the results.
第2図は、第1図(a)において示す如く、基体の移
動方向と充填ローラーの回転方向(第1図(a)中の矢
印α方向)を同一方向とした時の、基体移動速度に対す
る充填ローラー表面の相対速度(V、S、基体)と、活
物質充填量の関係を示す図である。充填ローラーの周速
度が基体移動速度の4倍程度になる、即ち充填ローラー
表面の基体に対する相対速度が基体の移動速度の3倍程
度になると、ほぼ均一で高密度な充填ができることが理
解される。尚、図中に引いた一点鎖線は、テストに用い
たスラリーの密度から求めた理論的な最大充填量であ
る。またテストに用いた基体は、平均孔径50μm、繊維
径20μm、多孔度93%のニツケルマツト、スラリーは平
均粒径20μmの水酸化ニツケル粉末とメチルセルロース
(MC)水溶液とを混合し、B型粘度計による測定で3000
cpになる様調製した、ニユートン流動を示すものであ
る。FIG. 2 is a graph showing the relationship between the moving speed of the substrate and the rotational speed of the filling roller (the direction of the arrow α in FIG. 1A) as shown in FIG. 1 (a). It is a figure which shows the relationship between the relative speed (V, S, base | substrate) of the filling roller surface, and active material filling amount. It is understood that when the peripheral speed of the filling roller is about four times the moving speed of the substrate, that is, when the relative speed of the surface of the filling roller to the substrate is about three times the moving speed of the substrate, almost uniform and high-density filling can be performed. . The dashed line drawn in the figure is the theoretical maximum filling amount obtained from the density of the slurry used for the test. The base used for the test was nickel matte having an average pore diameter of 50 μm, a fiber diameter of 20 μm, and a porosity of 93%. The slurry was prepared by mixing nickel hydroxide powder having an average particle diameter of 20 μm with an aqueous solution of methylcellulose (MC), and using a B-type viscometer. 3000 in measurement
It shows Newtonian flow prepared to be cp.
第2図において、充填ローラー表面の基体に対する相
対速度と、基体移動の速度比が小さくて充填量が少なか
ったものは、いずれも基体表面付近で目詰まりを起こし
ており、過現象が観察された。In FIG. 2, in all cases where the ratio of the relative speed of the surface of the filling roller to the substrate and the speed of the movement of the substrate were small and the amount of filling was small, clogging occurred near the substrate surface, and an excessive phenomenon was observed. .
第3図は、第1図(b)において示す如く、基体の移
動方向と充填ローラーの回転方向(第1図(b)中の矢
印β方向)を反対方向とした時の、基体に対する充填ロ
ーラー表面の相対速度(V、S、基体)と、活物質充填
量の関係を示す図である。尚、第3図の横軸は、充填ロ
ーラー周速度において方向性を考慮せず絶対値により示
してある。充填ローラーの回転方向が異なっても、充填
ローラー表面の基体に対する相対速度が基体の移動速度
の3倍程度になると、やはりほぼ均一で高密度な充填が
できることが理解される。尚、図中に引いた一点鎖線は
テストに用いたスラリーの密度から求めた理論的な最大
充填量である。ここにおける条件は、前記試験と同一と
した。FIG. 3 is a view showing the filling roller with respect to the substrate when the moving direction of the substrate and the rotation direction of the filling roller (the direction of arrow β in FIG. 1B) are opposite to each other, as shown in FIG. 1 (b). It is a figure which shows the relationship between the relative speed (V, S, base | substrate) of a surface, and active material filling amount. The horizontal axis in FIG. 3 indicates the absolute value of the peripheral speed of the filling roller without considering the directionality. It can be understood that even when the rotation direction of the filling roller is different, if the relative speed of the surface of the filling roller to the substrate is about three times the moving speed of the substrate, almost uniform and high-density filling can also be performed. The dashed line drawn in the figure is the theoretical maximum filling amount obtained from the density of the slurry used in the test. The conditions here were the same as in the above test.
次にスラリーの粘度変化が充填性に及ぼす影響につい
ても実験を行った。第1表はこの時の結果であり、これ
よりニユートン流動を示すスラリーであれば粘度が1000
〜10000cpの範囲で問題なく充填できることが理解され
る。また低粘度スラリーは、充填ローラー表面の基体に
対する相対速度が小さくなっても良好な充填状態が得ら
れ易い傾向が実験で認められた。そして、粘度1000cpよ
りも小さいときでは、粉末の沈降が速かに起こり、均一
なスラリーを保持しにくくなり、また含水率が高くなり
スラリー中の活物質密度が下がって充填量が少くなる、
などの不具合が現われる。一方、10000cpを越えた場合
では、スラリーの流動性が低く、基体内部まで流入しな
いという現象が生じた。尚、ここで用いたスラリーは、
全てニユートン流動を示すものである。また、基体の流
動方向と充填ローラーの回転方向を同一方向とし、充填
ローラー表面の基体に対する相対速度は、基体の移動速
度の6倍に設定している。そして、充填量単位(g/cc−
void)は、基体内の実空間単位体積当り充填された活物
質重量、を示すものである。Next, an experiment was conducted on the effect of the change in viscosity of the slurry on the filling property. Table 1 shows the results at this time. From this, if the slurry shows Newtonian flow, the viscosity is 1000
It is understood that filling can be performed without any problem in the range of ~ 10000cp. In addition, it was confirmed in experiments that the low-viscosity slurry tends to easily obtain a good filling state even when the relative speed of the surface of the filling roller to the substrate becomes small. And, when the viscosity is less than 1000 cp, sedimentation of the powder occurs quickly, it is difficult to maintain a uniform slurry, and the water content increases, the active material density in the slurry decreases, and the filling amount decreases.
Such defects as appear. On the other hand, when it exceeded 10,000 cp, the phenomenon that the fluidity of the slurry was low and did not flow into the inside of the substrate occurred. The slurry used here was
All show Newtonian flow. The flow direction of the substrate and the rotation direction of the filling roller are set to be the same direction, and the relative speed of the surface of the filling roller to the substrate is set to be six times the moving speed of the substrate. And the filling amount unit (g / cc-
void) indicates the weight of the active material filled per unit volume of the real space in the substrate.
(ヘ) 実施例 以下に本発明の実施例と比較例との対比に言及し、詳
述する。 (F) Examples Hereinafter, the present invention will be described in detail with reference to comparison between examples of the present invention and comparative examples.
(実施例1) 活物質である水酸化ニツケル粉末と、MC水溶液とを混
合し、粘度3000cpのニユートン流動を示すスラリーを調
製、繊維径20μm、平均孔径50μm、多孔度93%のニツ
ケルマツトに、第1図(a)に示すごとき充填装置を用
い、基体の移動方向と充填ローラーの回転方向を同一方
向とし、充填ローラー表面の基体に対する相対速度を、
基体の移動速度に比べて4倍となるよう設定し、上記ス
ラリーを充填した。(Example 1) A nickel hydroxide powder as an active material and an aqueous MC solution were mixed to prepare a slurry exhibiting a Newtonian flow of 3000 cp in viscosity. The nickel matte having a fiber diameter of 20 µm, an average pore diameter of 50 µm, and a porosity of 93% was prepared. 1 Using a filling device as shown in FIG. 1A, the moving direction of the substrate and the rotation direction of the filling roller are set to the same direction, and the relative speed of the surface of the filling roller to the substrate is
The slurry was filled so as to be four times as fast as the moving speed of the substrate.
(実施例2) 実施例1と同一のスラリー、基体及び第1図(b)に
示す充填装置を用い、基体の移動方向と充填ローラーの
回転方向を反対方向とすると共に充填ローラー表面の基
体に対する相対速度を基体の移動速度に比べて6倍とな
るように充填ローラーを回転させ、スラリーを充填し
た。(Example 2) Using the same slurry, substrate, and filling device shown in Fig. 1 (b) as in Example 1, the moving direction of the substrate and the rotation direction of the filling roller were set to be opposite directions, and the surface of the filling roller against the substrate was used. The filling roller was rotated so that the relative speed was 6 times the moving speed of the substrate, and the slurry was filled.
(実施例3) 実施例1と同一のスラリー、基体及び充填装置を用
い、外周面に回転に対し直角方向に切った槽を多数設け
た充填ローラーを用い、その他は実施例1と同一条件で
スラリーを充填した。(Example 3) Using the same slurry, substrate, and filling device as in Example 1, using a filling roller provided with a number of tanks cut on the outer peripheral surface in a direction perpendicular to the rotation, and otherwise using the same conditions as in Example 1. The slurry was filled.
(比較例1) 添加せるMC水溶液の糊料を減らし、同一含水量ではあ
るがニユートン流動を示さないスラリーを用いて、その
他は実施例に準じてスラリーの充填を行った。(Comparative Example 1) The amount of paste in the MC aqueous solution to be added was reduced, and a slurry having the same water content but not showing Newtonian flow was used.
(比較例2) 充填ローラー表面の基体に対する相対速度を、基体の
移動速度に比べて2倍に設定した他は、実施例1に準じ
スラリーを充填した。(Comparative Example 2) A slurry was filled in the same manner as in Example 1 except that the relative speed of the surface of the filling roller to the substrate was set to be twice the moving speed of the substrate.
(比較例3) 基体の上表面を往復運動する摺り具を用い、実施例1
と同じスラリーを同基体上に連続的に供給しつつ、充填
を行った。(Comparative Example 3) Example 1 using a sliding tool that reciprocates on the upper surface of the substrate.
Filling was performed while continuously supplying the same slurry as above on the same substrate.
実施例で示した充填基体を、乾燥後重量を測定し、実
際の充填量を求めた。その結果を、第2表に示す。The weight of the filled substrate shown in the examples was measured after drying, and the actual amount of the filled substrate was determined. Table 2 shows the results.
充填量のレベル、均一性、生産性、いずれをとっても
本発明による電極は優れていることがわかる。また、充
填ローラーの回転方向によって受ける影響が、少ないこ
とが理解される。そして実施例3に示した様に、充填ロ
ーラーの表面に溝をつけることにより、さらに充填の効
率が上がることが判った。これは、基体と充填ローラー
との接点での接触角が大きくなり、圧入力が増大するた
めと考えられる。 It can be seen that the electrode according to the present invention is excellent in any of the filling level, uniformity and productivity. It is also understood that the influence of the rotation direction of the filling roller is small. Then, as shown in Example 3, it was found that the filling efficiency was further increased by forming a groove on the surface of the filling roller. It is considered that this is because the contact angle at the contact point between the base and the filling roller increases, and the press-in force increases.
尚、スラリーの充填量を変動させる要素として、上述
した他に基体が充填ローラーと接触した後ローラー面と
接したまま移動する距離の長短、即ち基体とローラーと
の接触面積があるが、実際的には接触点で大部分の充填
が行われてしまうため、これを変えても大きな差はあら
われなかった。In addition to the factors described above that vary the filling amount of the slurry, the length of the distance in which the substrate moves while being in contact with the roller surface after contacting the filling roller, that is, the contact area between the substrate and the roller is practical. Since most of the filling was performed at the contact points, no significant difference appeared even if this was changed.
実施例においては水酸化ニツケルを主活物質とする電
極について例示したが何らこれに限定されるものでな
く、酸化沿等を用いても良い。また三次元的な連通孔を
有する金属多孔体としてニツケルマツトを用いたが、発
泡ニツケル等を使用しうることは言うまでもない。In the embodiment, the electrode using nickel hydroxide as a main active material has been exemplified. However, the present invention is not limited to this, and an oxide layer may be used. Also, nickel matte is used as the metal porous body having three-dimensional communication holes, but it goes without saying that foam nickel or the like can be used.
(ト) 発明の効果 本発明の電池用電極の製造方法及びその装置によれ
ば、電極製造工程上効率良く、高い充填率で、しかも均
一に基体に活物質を充填することが可能となり、その工
業的価値はきわめて大きい。(G) Effect of the Invention According to the method and apparatus for manufacturing a battery electrode of the present invention, it is possible to efficiently and efficiently fill a substrate with an active material at a high filling rate in an electrode manufacturing process. The industrial value is extremely large.
第1図(a)及び(b)はいずれも本発明に係る電池用
電極の製造装置の一実施例を示すものであり、第1図
(a)は基体の移動方向と充填ローラーの回転方向を同
一方向とした時の例、第1図(b)は基体の移動方向と
充填ローラーの回転方向を反対方向とした時の例を示
し、第2図及び第3図はいずれも基体の移動速度に対す
る充填ローラー表面の相対速度(V、S、基体)と充填
量との関係を示す図であり、第2図は基体の移動方向と
充填ローラーの回転方向を同一方向とした時の前記関係
を示す図、第3図は基体の移動方向と充填ローラーの回
転方向を反対方向とした時の前記関係を示す図である。 1……槽、2……スラリー、3……スクレパー、4……
反転ローラー、5……充填ローラー、6……基体、7…
…ガイドローラー、8……充填ローラーと基体との接触
点、9……駆動ローラー。1 (a) and 1 (b) show one embodiment of the apparatus for manufacturing a battery electrode according to the present invention, and FIG. 1 (a) shows the moving direction of the base and the rotating direction of the filling roller. 1 (b) shows an example in which the direction of movement of the substrate and the direction of rotation of the filling roller are opposite to each other, and FIGS. 2 and 3 both show movement of the substrate. FIG. 2 is a diagram showing the relationship between the relative speed (V, S, substrate) of the filling roller surface and the amount of filling with respect to the speed, and FIG. 2 shows the relationship when the moving direction of the substrate and the rotating direction of the filling roller are set to the same direction. FIG. 3 is a view showing the relationship when the moving direction of the base and the rotating direction of the filling roller are set to opposite directions. 1 ... tank, 2 ... slurry, 3 ... scraper, 4 ...
Reversing roller, 5 ... Filling roller, 6 ... Base, 7 ...
... guide roller, 8 ... contact point between filling roller and substrate, 9 ... drive roller.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 富田 正仁 大阪府守口市京阪本通2丁目18番地 三 洋電機株式会社内 (72)発明者 原口 洋 大阪府守口市京阪本通2丁目18番地 三 洋電機株式会社内 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masahito Tomita 2-18-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Hiroshi Haraguchi 2-18-18 Keihanhondori, Moriguchi-shi, Osaka Yo Electric Co., Ltd.
Claims (7)
体を基体とし、連続的に供給される該基体の空孔内に活
物質粉末を主成分とするスラリーを充填する方法であっ
て、前記スラリーを満たした槽と、該槽のスラリー内に
少なくとも一部浸漬するが完全には没しない位置にロー
ラーを設置し、前記ローラーのスラリー内に没していな
い少なくとも一点で接するように前記基体を導き、前記
ローラーを移動せる前記基体に対し十分に速い相対速度
をもつように回転させ、前記スラリーを前記基体に充填
することを特徴とする電池用電極の製造方法。1. A method of filling a slurry containing an active material powder as a main component into pores of a continuously supplied substrate having a porous metal body having three-dimensionally continuous pores as a substrate. A tank filled with the slurry, a roller is installed at a position at least partially immersed in the slurry of the tank but not completely immersed, and contacted at at least one point not immersed in the slurry of the roller. A method for manufacturing an electrode for a battery, comprising: guiding the substrate, rotating the roller so as to have a sufficiently high relative speed to the substrate to be moved, and filling the substrate with the slurry.
性流体であることを特徴とする請求項記載の電池用電
極の製造方法。2. The method according to claim 1, wherein the slurry is a viscous fluid exhibiting Newtonian flow.
が、基体の移動速度の3倍以上であることを特徴とする
請求項記載の電池用電極の製造方法。3. The method for manufacturing an electrode for a battery according to claim 1, wherein a relative speed of the roller surface to the substrate is at least three times a moving speed of the substrate.
ることを特徴とする請求項記載の電池用電極の製造方
法。4. The method according to claim 1, wherein the slurry has a viscosity of 1,000 to 10,000 cp.
体を基体とし、連続的に供給される該基体の空孔内に活
物質粉末を主成分とするスラリーを充填する装置であっ
て前記基体を連続的に供給する手段と、前記スラリーを
満たした槽と、前記スラリーを前記基体に充填する充填
ローラーと、不用な付着スラリーを前記基体より除去す
るスクレパーと、前記充填ローラーを回転駆動させる駆
動装置とを備え、前記充填ローラーは前記槽のスラリー
内に少なくとも一部浸漬するが完全には没しない位置に
配置されると共に前記槽のスラリー内に没していない少
なくとも一点で前記基体に接しており、前記駆動装置は
前記充填ローラーを移動せる前記基体に対し十分に速い
相対速度をもつように回転させることを特徴とする電池
用電極の製造装置。5. An apparatus in which a porous metal body having three-dimensionally continuous pores is used as a base, and a slurry containing an active material powder as a main component is filled in the continuously supplied pores of the base. A means for continuously supplying the substrate, a tank filled with the slurry, a filling roller for filling the slurry with the substrate, a scraper for removing unnecessary adhered slurry from the substrate, and rotating the filling roller. A driving device for driving, wherein the filling roller is disposed at a position where it is at least partially immersed in the slurry of the tank but is not completely immersed, and at least one point not immersed in the slurry of the tank. Wherein the driving device rotates the filling roller so as to have a sufficiently high relative speed with respect to the substrate to be moved.
速度が、基体の移動速度の3倍以上であることを特徴と
する請求項記載の電池用電極の製造装置。6. The apparatus for manufacturing a battery electrode according to claim 1, wherein a relative speed of the surface of the filling roller to the substrate is at least three times a moving speed of the substrate.
方向に対し直角に掘られた複数の溝を有するものである
ことを特徴とする請求項記載の電池用電極の製造装
置。7. An apparatus for manufacturing an electrode for a battery according to claim 1, wherein said filling roller has a plurality of grooves dug at right angles to a rotation direction on an outer peripheral surface.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19195487 | 1987-07-30 | ||
JP62-191954 | 1987-07-30 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH01105467A JPH01105467A (en) | 1989-04-21 |
JP2578649B2 true JP2578649B2 (en) | 1997-02-05 |
Family
ID=16283214
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63189101A Expired - Lifetime JP2578649B2 (en) | 1987-07-30 | 1988-07-28 | Method and apparatus for manufacturing battery electrode |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2578649B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4909955B2 (en) * | 2008-07-30 | 2012-04-04 | グローブライド株式会社 | Fishing electric reel |
-
1988
- 1988-07-28 JP JP63189101A patent/JP2578649B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH01105467A (en) | 1989-04-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7566385B2 (en) | Apparatus adapted for membrane-mediated electropolishing | |
JP2578649B2 (en) | Method and apparatus for manufacturing battery electrode | |
CN1576400B (en) | Electroplating apparatus and method for electronic parts,and the same electronic parts | |
US4887349A (en) | Method and apparatus for manufacturing electrode for battery | |
US4582098A (en) | Method of fabricating electrodes for battery | |
JP3492307B2 (en) | Paste filling method and device | |
JP3557043B2 (en) | Apparatus for filling active material slurry into battery electrode and method for manufacturing electrode using this apparatus | |
CN110787966B (en) | Lithium battery pole piece coating machine | |
CN211467658U (en) | Glue conveying and applying mechanism | |
JPH02288067A (en) | Manufacture of battery electrode and device therefor | |
JP2514149B2 (en) | Paste filling method and paste filling device for porous substrate for electrode | |
JP3561585B2 (en) | Method and apparatus for manufacturing non-sintered electrode | |
CN114050059B (en) | Foamed aluminum pole piece coating equipment and pole piece manufacturing method applying same | |
CN221366213U (en) | Printing machine convenient to coating | |
JPH0410182B2 (en) | ||
JPS61203560A (en) | Method for packing active material for battery | |
CN106622855A (en) | Filtering material production equipment | |
JP3306179B2 (en) | Manufacturing method of electrode plate | |
JPH10294108A (en) | Device for applying active material of pole plate for alkaline storage battery | |
JPS62105363A (en) | Manufacture of paste type plate | |
KR20070021162A (en) | Apparatus adapted for membrane mediated electropolishing | |
JPH04312767A (en) | Manufacture of paste-type nickel positive electrode | |
JP2000323136A (en) | Device for processing upper end of electrode sheet for battery | |
JPH0415582B2 (en) | ||
JP2022108573A (en) | Manufacturing method for positive electrode plate of alkali storage battery |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term | ||
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081107 Year of fee payment: 12 |