JP2708123B2 - Manufacturing method of paste electrode - Google Patents
Manufacturing method of paste electrodeInfo
- Publication number
- JP2708123B2 JP2708123B2 JP63095018A JP9501888A JP2708123B2 JP 2708123 B2 JP2708123 B2 JP 2708123B2 JP 63095018 A JP63095018 A JP 63095018A JP 9501888 A JP9501888 A JP 9501888A JP 2708123 B2 JP2708123 B2 JP 2708123B2
- Authority
- JP
- Japan
- Prior art keywords
- paste
- electrode substrate
- electrode
- substrate
- porosity
- 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 - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
-
- 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)
- Battery Electrode And Active Subsutance (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、各種の電池に使用されるペースト式電極の
製造方法に関する。Description: TECHNICAL FIELD The present invention relates to a method for producing a paste-type electrode used for various batteries.
［従来の技術及び課題］ 従来のペースト式電極では、ペーストの保持と集電作
用を兼ねる電極基板として金網、パンチドメタル又はラ
スメタル等の２次元構造のものが主に使用されている。
こうした電極基板を有するペースト式電極では、活物質
を含むペースト中に電極基板を通過させ、自然に付着さ
れたペーストをスクレーバーによって厚さを揃えるとい
った比較的簡単な方法で製造することができる。しかし
ながら、かかるペースト式電極でば電極基板が２次元構
造であるため集電性能及び引張りや曲げに対する強度が
不足するという問題があった。[Prior Art and Problems] In a conventional paste electrode, a two-dimensional structure such as a wire mesh, a punched metal or a lath metal is mainly used as an electrode substrate having both a paste holding function and a current collecting function.
A paste-type electrode having such an electrode substrate can be manufactured by a relatively simple method in which the paste containing the active material is passed through the electrode substrate and the thickness of the naturally attached paste is adjusted by a scraper. However, such a paste-type electrode has a problem that the current collecting performance and the strength against tension and bending are insufficient because the electrode substrate has a two-dimensional structure.
このようなことから、最近、発泡メタル、焼結金属繊
維等の３次元構造を持ち、かつ多孔度が90〜98％と高い
電極基板を有するペースト式電極が開発され、一部実用
化されている。かかる３次元構造の電極基板を用いたペ
ースト式電極では、全体に微細な金属マトリックスを有
するため、ペーストと電極基板との電子伝導性が良好と
なり、優れた集電性能を発揮できる。また、マトリック
スがペーストを強固に保持しているため、ペーストの剥
離が起り難く、かつ電極強度も優れている。このため、
大電流の充放電用電池であるニッケル−カドミウム電池
等に用いられている。Under these circumstances, recently, a paste type electrode having an electrode substrate having a three-dimensional structure of foamed metal, sintered metal fiber and the like and having a high porosity of 90 to 98% has been developed and partially put into practical use. I have. Since the paste type electrode using such a three-dimensional electrode substrate has a fine metal matrix as a whole, the electronic conductivity between the paste and the electrode substrate becomes good, and excellent current collecting performance can be exhibited. Further, since the matrix firmly holds the paste, peeling of the paste hardly occurs and the electrode strength is excellent. For this reason,
It is used for a nickel-cadmium battery or the like which is a large current charge / discharge battery.
上述した３次元構造の電極基板を有するペースト式電
極の製造においては、集電体の取付工程がある。一般に
集電体としては、ニッケル等の金属片を用い、かつ該集
電体が取付けられる電極基板部分はペーストを充填せ
ず、金属の地肌が完全に露出した状態を形成し、両者を
溶接にて一体化する。また、最近のタブレス電極におい
ては電極基板の一辺全てを金属の地肌が完全に露出した
状態にすることが要求される。In the production of the paste-type electrode having the above-described three-dimensionally structured electrode substrate, there is a process of attaching a current collector. Generally, as the current collector, a metal piece such as nickel is used, and the electrode substrate portion to which the current collector is attached is not filled with the paste, and a state where the ground of the metal is completely exposed is formed. And unite. Further, in recent tabless electrodes, it is required that the metal substrate be completely exposed on one side of the electrode substrate.
上記要求と量産性の観点から従来、ペースト式電極を
次のような方法により製造している。まず、３次元構造
を有する長尺電極基板を加圧して板金のように形成する
か、もしくは帯状金属をシーム溶接して電極基板の孔を
閉塞するかいずれかにより集電体が溶接される電極基板
部分にペーストが充填されない無充填部を形成する。つ
づいて、前記長尺電極基板に活物質を含むペーストを充
填した後、電極基板の無充填部のペーストを除去する。
次いで、電極基板内のペーストの充填密度を上げるため
にその長手方向に沿ってローラープレスを行い、切断加
工等を施した後、電極基板の無充填部に集電体を溶接し
てペースト式電極を製造する。From the viewpoint of the above requirements and mass productivity, a paste-type electrode has been conventionally manufactured by the following method. First, an electrode to which a current collector is welded by pressing a long electrode substrate having a three-dimensional structure to form like a sheet metal or by seam welding a strip-shaped metal to close a hole in the electrode substrate. An unfilled portion where the paste is not filled in the substrate portion is formed. Subsequently, after the long electrode substrate is filled with the paste containing the active material, the paste in the unfilled portion of the electrode substrate is removed.
Next, in order to increase the filling density of the paste in the electrode substrate, a roller press is performed along the longitudinal direction, and after performing a cutting process or the like, a current collector is welded to an unfilled portion of the electrode substrate to form a paste electrode. To manufacture.
しかしながら、従来のペースト式電極の製造方法にあ
っては集電体が溶接される電極基板の無充填部が板金の
ように成形されたり、帯状金属がシーム溶接されている
ため、前記ローラプレスに際して該無充填部と多孔度の
高いペースト充填部と間で伸延度差が生じるため、両者
の境界で電極基板が破損するという問題があった。However, in the conventional paste-type electrode manufacturing method, the unfilled portion of the electrode substrate to which the current collector is welded is formed like a sheet metal, or the band-shaped metal is seam-welded. Since there is a difference in elongation between the unfilled portion and the highly porous paste-filled portion, there is a problem that the electrode substrate is damaged at the boundary between the two.
本発明は、上記従来の課題を解決するためになされた
もので、ローラプレスに際して３次元構造を有する電極
基板のペースト充填部と無充填部との境界での破損を防
止でき、かつ該電極基板に集電体をスプラッシュや溶接
端子の食いつき等を招くことなく強固に溶接し得るペー
スト式電極の製造方法を提供しようとするものである。The present invention has been made to solve the above-mentioned conventional problems, and can prevent breakage at a boundary between a paste-filled portion and a non-filled portion of an electrode substrate having a three-dimensional structure during roller pressing, and It is another object of the present invention to provide a method of manufacturing a paste-type electrode capable of firmly welding a current collector without causing splash or biting of a welding terminal.
［課題を解決するための手段］ 本発明は、３次元構造を有する長尺電極基板を加圧し
て該基板を長手方向に沿って多孔度が20〜60体積％の１
本又は複数本の低多孔度領域を形成する工程と、前記長
尺電極基板に活物質を含むペーストを充填した後、前記
低多孔度領域のペーストを除去する工程と、前記電極基
板をその長手方向に沿ってローラプレスを行なう工程
と、電極基板の低多孔度領域に集電体を溶接する工程と
を具備したことを特徴とするペースト式電極の製造方法
である。Means for Solving the Problems According to the present invention, a long electrode substrate having a three-dimensional structure is pressurized so that the substrate has a porosity of 20 to 60% by volume along the longitudinal direction.
A step of forming one or a plurality of low porosity regions, a step of filling the long electrode substrate with a paste containing an active material, and then removing the paste of the low porosity region; A method of manufacturing a paste-type electrode, comprising: a step of performing roller pressing along a direction; and a step of welding a current collector to a low porosity region of an electrode substrate.
以下、本発明を図面を参照して詳細に説明する。 Hereinafter, the present invention will be described in detail with reference to the drawings.
まず、第１図に示すように３次元構造を有する電極基
板フープ１から供給された長尺電極基板２を外周面に１
本又は複数本（例えば２本）の環状突起３が形成された
一対の突起付ローラ4a、4b間を通して加圧し、長尺電極
基板２の長手方向に沿って多孔度が20〜60体積％の２本
の低多孔度領域５を形成する。ここに用いる３次元構造
を有する電極基板としては、例えば発泡メタル、焼結金
属繊維等を挙げることができる。特に、焼結金属繊維は
引張り力に応じて金属フィラメントが直線状に延伸した
り、強度的に弱い部分の焼結点が離れたりして伸延度が
大きいため好適である。前記突起付ローラ4a、4bの加圧
により長尺電極基板２に形成した低多孔度領域５の多孔
度を上記範囲に限定した理由は、その多孔度を20体積％
未満にすると板金に近い状態になり、この後の工程であ
るローラプレスに際して長尺電極基板のペースト充填部
と無充填部で伸延度の差が生じて電極基板に破損を発生
し、一方多孔度が60体積％を越えると低多孔度領域の孔
が充分に閉塞されず、ペースト充填工程において該低多
孔度領域にもペーストが充填され、この結果集電体の溶
接に際してスプラッシュの発生、溶接端子の食付きや溶
接強度不良を起こすからである。First, a long electrode substrate 2 supplied from an electrode substrate hoop 1 having a three-dimensional structure as shown in FIG.
Pressure is applied between a pair of projection-equipped rollers 4a and 4b on which one or a plurality of (for example, two) annular projections 3 are formed, and a porosity of 20 to 60% by volume along the longitudinal direction of the long electrode substrate 2. Two low porosity regions 5 are formed. Examples of the electrode substrate having a three-dimensional structure used here include foamed metal and sintered metal fiber. In particular, the sintered metal fiber is suitable because the metal filament is stretched linearly in response to the tensile force, or the sintering point of the weak portion is separated, and the elongation is large. The reason that the porosity of the low porosity region 5 formed on the long electrode substrate 2 by pressing the rollers 4a and 4b with protrusions is limited to the above range is that the porosity is 20% by volume.
If it is less than the above, it will be in a state close to a sheet metal, and in the subsequent process of roller pressing, a difference in elongation occurs between the paste filled part and the unfilled part of the long electrode substrate, causing damage to the electrode substrate, Exceeds 60% by volume, the pores in the low porosity region are not sufficiently clogged, and the low porosity region is also filled with the paste in the paste filling step. This causes biting and poor welding strength.
次いで、前記長尺電極基板２をペースト充填部材６を
通過させることにより該長尺電極基板２に活物質を含む
ペーストを充填した後、乾燥炉７を通して乾燥を行な
い、更にプラッシング等のペースト除去部材８を通して
長尺電極基板２の低多孔度領域５上に付着されたペース
トを除去する。ここに用いるペーストとしては、例えば
水酸化ニッケルなどの正極活物質とカルボキシメチル
セルロース、メチルセルロース、ポリアクリル酸ソーダ
などの結着剤と水などの分散剤の組成からなる正極用ペ
ースト、酸化カドミウムなどの負極活物質とポリビニ
ルアルコールなどの結着剤と水などの分散剤の組成から
なる負極用ペーストを挙げることができる。また、前記
正極用ペーストには必要に応じて利用率を高めるために
水酸化コバルト、特にβ−Co(OH)2を添加してもよい。
なお、ここではペーストの充填後に乾燥、ペースト除去
を行なったが、ペーストの充填後にペースト除去、乾燥
を行なってもよい。この時のペースト除去にあたって
は、長尺電極基板の低多孔度領域上のペーストが充分に
粘着性を有するため、ブレードの掻取り、バキューム吸
取りにより除去すればよい。Next, after the long electrode substrate 2 is filled with a paste containing an active material by passing the long electrode substrate 2 through a paste filling member 6, drying is performed through a drying furnace 7, and a paste removing member such as pushing is performed. The paste attached on the low porosity area 5 of the long electrode substrate 2 is removed through 8. Examples of the paste used here include a positive electrode active material such as nickel hydroxide, a carboxymethyl cellulose, a paste for a positive electrode comprising a composition of a binder such as methyl cellulose and sodium polyacrylate and a dispersant such as water, and a negative electrode such as cadmium oxide. A negative electrode paste comprising a composition of an active material, a binder such as polyvinyl alcohol, and a dispersant such as water can be used. Further, if necessary, cobalt hydroxide, particularly β-Co (OH) 2 , may be added to the positive electrode paste in order to increase the utilization factor.
Here, drying and paste removal are performed after filling the paste, but paste removal and drying may be performed after filling the paste. In removing the paste at this time, since the paste on the low porosity region of the long electrode substrate has sufficient adhesiveness, it may be removed by scraping a blade or vacuuming.
次いで、ペーストの充填がなされた長尺電極基板２を
ペーストの充填密度を更に上げるために一対のローラ9
a、9b間に通してその長手方向に沿ってローラプレスを
行なう。つづいて、長尺電極基板２を一対のカッタ10
a、10bで切断加工等を施す。Next, the long electrode substrate 2 filled with the paste is removed by a pair of rollers 9 in order to further increase the filling density of the paste.
Roller press is carried out along the longitudinal direction by passing between a and 9b. Subsequently, the long electrode substrate 2 is connected to a pair of cutters 10.
Cutting is performed at a and 10b.
次いで、上記工程により得られた例えば第２図に示す
ペースト充填部11及び中央に無充填部12を有する電極基
板13の無充填部12にニッケル片からなる集電体14を熔接
してタブつきペースト式電極を製造する。また、第３図
に示すようにペースト充填部11及び一辺に無充填部12を
有する電極基板13′の無充填部12にニッケル片からなる
集電体14を熔接してタブレスペースト式電極を製造す
る。Next, a current collector 14 made of a nickel piece is welded to the paste-filled portion 11 obtained by the above process and the unfilled portion 12 of the electrode substrate 13 having the unfilled portion 12 in the center as shown in FIG. Manufacture paste electrode. As shown in FIG. 3, a current collector 14 made of a nickel piece is welded to the unfilled portion 12 of the electrode substrate 13 'having a paste filled portion 11 and an unfilled portion 12 on one side to form a tabless paste type electrode. To manufacture.
［作用］ 本発明によれば、３次元構造を有する長尺電極基板を
加圧して該基板の長手方向に沿って多孔度が20〜60体積
％の１本又は複数本の低多孔度領域を形成し、この長尺
電極基板への活物質を含むペーストの充填、前記低多孔
度領域のペースト除去、更に電極基板のローラプレスを
行なった後、電極基板の低多孔度領域に集電体を熔接す
ることによって、前記ローラプレスに際して電極基板の
ペースト充填部と無充填部との間の伸延度の差を緩和し
てそれらの境界で破損するのを防止でき、かつ該電極基
板の低多孔度領域に集電体がスプラシュや溶接端子の食
いつき等を招くことなく強固に溶接されたペースト式電
極を量産的に製造することができる。[Operation] According to the present invention, a long electrode substrate having a three-dimensional structure is pressurized to form one or more low porosity regions having a porosity of 20 to 60% by volume along the longitudinal direction of the substrate. After forming and filling the paste containing the active material into the long electrode substrate, removing the paste in the low porosity region, and further performing roller pressing of the electrode substrate, a current collector is formed in the low porosity region of the electrode substrate. By welding, the difference in elongation between the paste-filled portion and the unfilled portion of the electrode substrate during the roller pressing can be reduced to prevent breakage at the boundary between them, and the electrode substrate has a low porosity. It is possible to mass-produce a paste-type electrode in which a current collector is firmly welded to a region without causing splash or biting of a welding terminal.
［実施例］ 以下、本発明の実施例を前述した第１図及び第２図を
参照して詳細に説明する。Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2 described above.
実施例１ まず、第１図に示すように３次元構造を有する電極基
板フープ１を装置内にセットした。この電極基板フープ
１としては、ニッケルインゴットをびびり振動切削法に
よって繊維化し、焼結した焼結ニッケル繊維からなる３
次元構造を有する幅20cm,厚さ1.3mmの長尺電極基板を巻
回したものを用いた。つづいて、前記電極基板フープ１
から供給された長尺電極基板２を外周面に２本の環状突
起３が形成された一対の突起付ローラ4a、4b間を通して
該突起３に対応する電極基板２の厚さが112μｍとなる
ように加圧し、長尺電極基板２の両側から各5mmの位置
を中心として幅3cmの２本の低多孔度領域５（多孔度;20
体積％）を該電極基板２の長手方向に沿って形成した。Example 1 First, as shown in FIG. 1, an electrode substrate hoop 1 having a three-dimensional structure was set in an apparatus. The electrode substrate hoop 1 is made of sintered nickel fiber obtained by fibrillating a nickel ingot by chatter vibration cutting and sintering.
A long electrode substrate having a two-dimensional structure and a width of 20 cm and a thickness of 1.3 mm was used. Subsequently, the electrode substrate hoop 1
The long electrode substrate 2 supplied from above is passed through a pair of protrusion-provided rollers 4a and 4b having two annular protrusions 3 formed on the outer peripheral surface so that the electrode substrate 2 corresponding to the protrusions 3 has a thickness of 112 μm. And two low porosity regions 5 (porosity; 20 cm) each having a width of 3 cm centered on a position of 5 mm each from both sides of the long electrode substrate 2.
(% By volume) along the longitudinal direction of the electrode substrate 2.
次いで、前記長尺電極基板２をペースト充填部材６を
通過させることにより該長尺電極基板２に活物質を含む
ペーストを充填した後、乾燥炉７を通して乾燥を行な
い、更にペースト除去部材８を通して長尺電極基板２の
低多孔度領域５上に付着されたブラッシングしてペース
トを除去した。前記ペーストには、水酸化ニッケル粉末
100重量部にカルボキシメチルセルロース0.5重量部及び
蒸溜水35重量部を添加、混練したものを使用した。つづ
いて、ペーストの充填がなされた長尺電極基板２を一対
のローラ9a、9b間に通してその厚さが0.6mmになるまで
ローラプレスを行なった。この時、ペースト充填部は約
30％延伸した。ひきつづき、長尺電極基板２を一対のカ
ッタ10a、10bで切断加工等を施すことにより、第２図に
示すペースト充填部11及び中央に無充填部12を有する電
極基板13を作製した。この後、同第２図に示すように電
極基板13の無充填部12に幅3mmのニッケル片からなる集
電体14を当接させ、50kA/cm2の電流密度でスポット溶接
してタブつきペースト式電極を製造した。Next, after the long electrode substrate 2 is filled with a paste containing an active material by passing the long electrode substrate 2 through a paste filling member 6, the paste is dried through a drying furnace 7 and further passed through a paste removing member 8. The paste attached on the low porosity region 5 of the long electrode substrate 2 was brushed to remove the paste. The paste contains nickel hydroxide powder
A mixture obtained by adding and kneading 0.5 part by weight of carboxymethyl cellulose and 35 parts by weight of distilled water to 100 parts by weight was used. Subsequently, the long electrode substrate 2 filled with the paste was passed between a pair of rollers 9a and 9b and subjected to roller pressing until the thickness became 0.6 mm. At this time, the paste filling part
Stretched 30%. Subsequently, by cutting the long electrode substrate 2 with a pair of cutters 10a and 10b, an electrode substrate 13 having a paste filling portion 11 and a non-filling portion 12 in the center shown in FIG. 2 was produced. Thereafter, as shown in FIG. 2, a current collector 14 made of a nickel piece having a width of 3 mm was brought into contact with the unfilled portion 12 of the electrode substrate 13 and spot-welded at a current density of 50 kA / cm 2 to form a tab. A paste electrode was manufactured.
実施例２ 長尺電極基板を外周面に２本の条線が形成された一対
の条線付ローラ間を通して該環状突起に対応する基板の
厚さが150μｍとなるように加圧し、長尺電極基板の両
側から各5mmの位置を中心として幅3cmの２本の低多孔度
領域（多孔度;40体積％）を該電極基板の長手方向に沿
って形成した以外、実施例１と同様な方法によりタブつ
きペースト式電極を製造した。Example 2 A long electrode substrate was pressed through a pair of striped rollers having two strips formed on the outer peripheral surface thereof so that the thickness of the substrate corresponding to the annular projection became 150 μm. A method similar to that of Example 1, except that two low-porosity regions (porosity; 40% by volume) having a width of 3 cm centered on a position of 5 mm each from both sides of the substrate were formed along the longitudinal direction of the electrode substrate. To produce a tab-type paste electrode.
実施例３ 長尺電極基板を外周面に２本の条線が形成された一対
の条線付ローラ間を通して該環状突起に対応する基板の
厚さが225μｍとなるように加圧し、長尺電極基板の両
側から各5mmの位置を中心として幅3cmの２本の低多孔度
領域（多孔度;60体積％）を該電極基板の長手方向に沿
って形成した以外、実施例１と同様な方法によりタブつ
きペースト式電極を製造した。Example 3 A long electrode substrate was pressed through a pair of striped rollers having two strips formed on the outer peripheral surface so that the thickness of the substrate corresponding to the annular projection was 225 μm. A method similar to that of Example 1 except that two low porosity regions (porosity; 60% by volume) with a width of 3 cm centered on a position of 5 mm each from both sides of the substrate were formed along the longitudinal direction of the electrode substrate. To produce a tab-type paste electrode.
比較例１ 長尺電極基板を外周面に２本の条線が形成された一対
の条線付ローラ間を通して該環状突起に対応する基板の
厚さが100μｍとなるように加圧し、長尺電極基板の両
側から各5mmの位置を中心として幅3cmの２本の低多孔度
領域（多孔度;10体積％）を該電極基板の長手方向に沿
って形成した以外、実施例１と同様な方法によりタブつ
きペースト式電極を製造した。Comparative Example 1 A long electrode substrate was pressed through a pair of striped rollers having two strips formed on the outer peripheral surface so that the thickness of the substrate corresponding to the annular protrusion became 100 μm. A method similar to that of Example 1 except that two low-porosity regions (porosity; 10% by volume) having a width of 3 cm centered on a position of 5 mm each from both sides of the substrate were formed along the longitudinal direction of the electrode substrate. To produce a tab-type paste electrode.
比較例２ 長尺電極基板を外周面に２本の条線が形成された一対
の条線付ローラ間を通して該環状突起に対応する基板の
厚さが300μｍとなるように加圧し、長尺電極基板の両
側から各5mmの位置を中心として幅3cmの２本の低多孔度
領域（多孔度;70体積％）を該電極基板の長手方向に沿
って形成した以外、実施例１と同様な方法によりタブつ
きペースト式電極を製造した。Comparative Example 2 A long electrode substrate was pressed through a pair of striped rollers having two strips formed on the outer peripheral surface so that the thickness of the substrate corresponding to the annular projection was 300 μm. A method similar to that of Example 1 except that two low-porosity regions (porosity; 70% by volume) having a width of 3 cm were formed along the longitudinal direction of the electrode substrate, each centered at a position of 5 mm from both sides of the substrate. To produce a tab-type paste electrode.
しかして、本実施例１〜３及び比較例１、２のペース
ト式電極の製造において、ローラプレス後の電極基板
（特に無充電部）の外観を検査すると共に、各々100回
のスポット溶接時でのスプラッシュや溶接端子の食付き
回数を調べた。その結果を下記第１表に示す。Thus, in the production of the paste type electrodes of Examples 1 to 3 and Comparative Examples 1 and 2, the appearance of the electrode substrate (particularly, the non-charged portion) after the roller pressing was inspected, and each time the spot welding was performed 100 times. The number of splashes and bites on the welding terminals were examined. The results are shown in Table 1 below.
上記第１表から明らかなように、ペースト充填前に電
極基板に形成した低多孔度領域の多孔度を10体積％とし
た比較例１では、無充填部に約2cm間隔で大きさ5mmの欠
落が見られ、その周囲のペースト充填部も引張られたよ
うに歪んでいることが認められた他、破損等の異常が見
られた。これに対し、ペースト充填前に電極基板に形成
した低多孔度領域が多孔度を20、40、60、70体積％とし
た実施例１〜３及び比較例２では無充填部が一旦板状に
成形されたが、再び元通りの状態に戻っていた。 As is clear from Table 1 above, in Comparative Example 1 in which the porosity of the low porosity region formed on the electrode substrate before filling the paste was 10% by volume, the unfilled portions had a size of 5 mm at intervals of about 2 cm. Was observed, and the surrounding paste-filled portion was also warped as if pulled, and abnormalities such as breakage were observed. In contrast, in Examples 1 to 3 and Comparative Example 2 in which the low porosity region formed on the electrode substrate before filling with the paste had a porosity of 20, 40, 60, and 70% by volume, the unfilled portion was once in a plate shape. It was molded but returned to its original state.
また、スポット溶接においてはペースト充填前に電極
基板に形成した低多孔度領域の多孔度を70体積％とした
比較例２のみがスプラッシュや溶接端子食付き等の欠陥
が36％の確率で発生したが、これ以外の実施例１〜３及
び比較例１ではその欠陥が10％未満であった。Further, in the spot welding, only the comparative example 2 in which the porosity of the low porosity region formed on the electrode substrate before filling the paste was 70% by volume resulted in a 36% probability of defects such as splashes and welding terminal bites. However, in Examples 1 to 3 and Comparative Example 1, the defects were less than 10%.
［発明の効果］ 以上詳述した如く、本発明によればローラプレスに際
して３次元構造を有する電極基板のペースト充電部と無
充電部との境界での破損を防止でき、かつ該電極基板に
集電体がスプラッシュや溶接端子の食いつき等を招くこ
となく強固に溶接されたペースト式電極を量産的に製造
し得る方法を提供できる。[Effects of the Invention] As described in detail above, according to the present invention, it is possible to prevent breakage at the boundary between the paste charging portion and the non-charging portion of the electrode substrate having a three-dimensional structure during roller pressing, and to collect the electrode substrate. It is possible to provide a method capable of mass-producing a paste-type electrode in which an electric body is firmly welded without causing splash or biting of a welding terminal.
第１図は本発明のペースト式電極を製造するための装置
を示す概略斜視図、第２図はダブつきペースト式電極を
示す平面図、第３図はタブレスペースト式電極を示す平
面図である。 １……電極基板フープ、２……長尺電極基板、4a、4b…
…突起付ローラ、５……低多孔度領域、６……ペースト
充填部材、9a、9b……ローラ、11……ペースト充填部、
12……無充填部、13、13′……電極基板、14……集電
体。FIG. 1 is a schematic perspective view showing an apparatus for manufacturing the paste type electrode of the present invention, FIG. 2 is a plan view showing a paste type electrode with a dub, and FIG. 3 is a plan view showing a tabless paste type electrode. is there. 1 ... electrode substrate hoop, 2 ... long electrode substrate, 4a, 4b ...
... Roller with projection, 5 ... Low porosity area, 6 ... Paste filling member, 9a, 9b ... Roller, 11 ... Paste filling part,
12: Unfilled portion, 13, 13 ': Electrode substrate, 14: Current collector.
Claims (1)
て該基板の長手方向に沿って多孔度が20〜60体積％の１
本又は複数本の低多孔度領域を形成する工程と、前記長
尺電極基板に活物質を含むペーストを充填した後、前記
低多孔度領域のペーストを除去する工程と、前記電極基
板をその長手方向に沿ってローラプレスを行なう工程
と、電極基板の低多孔度領域に集電体を溶接する工程と
を具備したことを特徴とするペースト式電極の製造方
法。1. A long electrode substrate having a three-dimensional structure is pressurized to have a porosity of 20 to 60% by volume along the longitudinal direction of the substrate.
A step of forming one or a plurality of low porosity regions, a step of filling the long electrode substrate with a paste containing an active material, and then removing the paste of the low porosity region; A method for producing a paste-type electrode, comprising: a step of performing roller pressing along a direction; and a step of welding a current collector to a low porosity region of an electrode substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63095018A JP2708123B2 (en) | 1988-04-18 | 1988-04-18 | Manufacturing method of paste electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63095018A JP2708123B2 (en) | 1988-04-18 | 1988-04-18 | Manufacturing method of paste electrode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01265452A JPH01265452A (en) | 1989-10-23 |
| JP2708123B2 true JP2708123B2 (en) | 1998-02-04 |
Family
ID=14126300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63095018A Expired - Fee Related JP2708123B2 (en) | 1988-04-18 | 1988-04-18 | Manufacturing method of paste electrode |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2708123B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2711015B1 (en) * | 1993-10-06 | 1995-11-24 | Sorapec | Composite collector for an electrode and method of manufacturing such a collector. |
| US6020089A (en) * | 1994-11-07 | 2000-02-01 | Sumitomo Electric Industries, Ltd. | Electrode plate for battery |
| KR20100114934A (en) | 2008-06-25 | 2010-10-26 | 파나소닉 주식회사 | Electrode structural body for non-aqueous electrolyte secondary battery, method of manufacture thereof and non-aqueous electrolyte secondary battery |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01120761A (en) * | 1987-11-02 | 1989-05-12 | Yuasa Battery Co Ltd | Manufacture of alkaline storage battery plate |
-
1988
- 1988-04-18 JP JP63095018A patent/JP2708123B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01265452A (en) | 1989-10-23 |
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