FR2711015A1 - Composite collector for electrode and method of manufacture of such a collector - Google Patents

Composite collector for electrode and method of manufacture of such a collector Download PDF

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Publication number
FR2711015A1
FR2711015A1 FR9312098A FR9312098A FR2711015A1 FR 2711015 A1 FR2711015 A1 FR 2711015A1 FR 9312098 A FR9312098 A FR 9312098A FR 9312098 A FR9312098 A FR 9312098A FR 2711015 A1 FR2711015 A1 FR 2711015A1
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France
Prior art keywords
collector
crushed
dimensional structure
composite
strips
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Granted
Application number
FR9312098A
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French (fr)
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FR2711015B1 (en
Inventor
Bronoel Guy
Bugnet Bernard
Potier Thierry
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SORAPEC SA
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SORAPEC SA
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Publication date
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Priority to FR9312098A priority Critical patent/FR2711015B1/en
Publication of FR2711015A1 publication Critical patent/FR2711015A1/en
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Publication of FR2711015B1 publication Critical patent/FR2711015B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • H01M4/64—Carriers or collectors
    • 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
    • H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
    • 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
    • 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
    • H01M4/64—Carriers or collectors
    • H01M4/70—Carriers or collectors characterised by shape or form
    • H01M4/80—Porous plates, e.g. sintered carriers
    • 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
    • H01M50/534—Electrode connections inside a battery casing characterised by the material of the leads or tabs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • 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
    • H01M4/64—Carriers or collectors
    • H01M4/70—Carriers or collectors characterised by shape or form
    • H01M4/80—Porous plates, e.g. sintered carriers
    • H01M4/808—Foamed, spongy materials
    • 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

A composite collector and a method of manufacture thereof are described, in which the three-dimensional structure is compressed over a part of its area in order to form crushed zones therein, then a metal foil is welded onto a three-dimensional structure by weld lines or successions of weld points (spot welds) located substantially in the central part of the crushed zones.

Description

COLLECTEUR COMPOSITE POUR ELECTRODE ET PROCEDE DE
FABRICATION D'UN TEL COLLECTEUR
La présente invention se rapporte à un collecteur composite pour électrode du type présentant une structure tridimensionnelle à porosité ouverte, appelée souvent collecteur tridimensionnel" ou collecteur d'électrode, associée à une structure plane, désignée souvent par collecteur plan" ou collecteur principal". Elle concerne ainsi, par exemple mais non exclusivement, les collecteurs pour électrodes bipolaires. L'invention se rapporte également à la fabrication d'un tel collecteur.COMPOSITE COLLECTOR FOR ELECTRODE AND METHOD FOR
MANUFACTURE OF SUCH A COLLECTOR
The present invention relates to a composite collector for an electrode of the type having a three-dimensional structure with open porosity, often called a three-dimensional collector "or electrode collector, associated with a planar structure, often designated by a flat collector" or main collector ". This relates, for example, but not exclusively, to collectors for bipolar electrodes The invention also relates to the manufacture of such a collector.

Dans un certain nombre de réalisations concernant, par exemple, les accumulateurs alcalins Ni-Cd,
Ni-hydrures, Ni-Zn, etc..., il peut être nécessaire de raccorder des collecteurs tridimensionnels à porosité ouverte (mousses ou feutres) qui sont remplis de la matière active, avec un collecteur plan (feuille ou feuillard métallique).In a certain number of embodiments relating, for example, to Ni-Cd alkaline accumulators,
Ni-hydrides, Ni-Zn, etc ..., it may be necessary to connect three-dimensional collectors with open porosity (foams or felts) which are filled with the active material, with a flat collector (sheet or metal strip).

Ce type de raccordement ou de liaison peut être effectué, par exemple, lorsqu'on veut réaliser des électrodes de capacité surfacique élevée. Dans ce cas, on cherchera à connecter une mousse (par exemple en nickel) sur chaque face d'un feuillard métallique perforé (nickel ou acier nickelé dans le cas, par exemple, d'électrodes positives pour accumulateurs alcalins), les mousses étant par la suite remplies de matière électrochimiquement active. On conçoit qu'en fonction de la capacité des électrodes et du régime de charge et décharge, il convienne de définir un nombre suffisant de points de liaison, de telle façon que le drainage des charges soit satisfaisant, n'entraînant pas de chutes ohmiques importantes et assurant une bonne homogénéité du champ électrique en fonctionnement. This type of connection or connection can be made, for example, when it is desired to produce electrodes with a high surface capacitance. In this case, we will try to connect a foam (for example nickel) on each side of a perforated metal strip (nickel or nickel-plated steel in the case, for example, of positive electrodes for alkaline accumulators), the foams being by subsequently filled with electrochemically active material. It is understood that, depending on the capacity of the electrodes and the charge and discharge regime, it is advisable to define a sufficient number of connection points, so that the drainage of the charges is satisfactory, not causing significant ohmic drops. and ensuring good homogeneity of the electric field in operation.

Ces problèmes se posent également lorsque l'on veut réaliser des électrodes bipolaires, dont l'une au moins des polarités intéresse une électrode comportant un collecteur tridimensionnel de type mousse ou feutre. These problems also arise when it is desired to produce bipolar electrodes, of which at least one of the polarities concerns an electrode comprising a three-dimensional collector of the foam or felt type.

Le problème est particulièrement délicat dans le cas, par exemple, de la réalisation d'un accumulateur Ni-Cd à électrodes bipolaires, car il faut mettre en oeuvre des mousses de masse surfacique faible (pour l'obtention de caractéristiques massiques intéressantes), et par conséquent, les caractéristiques mécaniques sont médiocres. The problem is particularly delicate in the case, for example, of the production of an Ni-Cd accumulator with bipolar electrodes, since it is necessary to use foams of low surface mass (for obtaining advantageous mass characteristics), and therefore, the mechanical properties are poor.

Les difficultés rencontrées tiennent à ce que si on effectue une soudure par points (uniformément répartis sur toute la surface de l'électrode) des mousses sur un feuillard, on constate en premier lieu qu'il est difficile d'obtenir des soudures de bonne qualité, ceci étant dû au caractère très aéré des structures du type mousse. The difficulties encountered are due to the fact that if spot welding (uniformly distributed over the entire surface of the electrode) of the foams is carried out on a strip, it is first observed that it is difficult to obtain good quality welds. , this being due to the very airy character of the foam type structures.

En deuxième lieu, les structures mousses vont être ensuite remplies, le plus souvent par voie mécanique, de la matière active. I1 est alors obligatoire de procéder à un compactage des matières actives dans les mousses. Ce compactage peut être effectué par passage sous une presse ou par laminage. Après ces opérations, dans le cas de points de soudure répartis sur toute la surface de l'électrode, on observe très souvent une rupture de brins constitutifs de la mousse dans les zones proches des points de soudure. Secondly, the foam structures will then be filled, most often mechanically, with the active material. It is then compulsory to compact the active materials in the foams. This compaction can be carried out by passing under a press or by rolling. After these operations, in the case of welding spots distributed over the entire surface of the electrode, very often a rupture of the strands constituting the foam is observed in the areas close to the welding spots.

Dans le cas où le feuillard constituant par exemple la paroi bipolaire, est de faible épaisseur (par exemple 5/100 mm), il a été également observé une fissuration de celui-ci. In the case where the strip constituting, for example, the bipolar wall, is thin (for example 5/100 mm), cracking of the latter has also been observed.

Afin de remédier aux inconvénients précités, il a été mis au point un collecteur composite comprenant une structure tridimensionnelle à porosité ouverte et une structure plane. La structure tridimensionnelle présente des zones écrasées et c'est au niveau des zones écrasées que la structure plane est raccordée par soudure à la structure tridimensionnelle.  In order to remedy the aforementioned drawbacks, a composite collector has been developed comprising a three-dimensional structure with open porosity and a planar structure. The three-dimensional structure has crushed zones and it is at the level of the crushed zones that the planar structure is connected by welding to the three-dimensional structure.

Une forme d'exécution avantageuse et de mise en oeuvre aisée est le cas où les zones écrasées se présentent sous forme de bandes parallèles. Dans une variante préférée, les bandes parallèles ont avantageusement une largeur comprise entre 4 et 12 mm, par exemple, de l'ordre de 8 mm. An advantageous embodiment and of easy implementation is the case where the crushed zones are in the form of parallel strips. In a preferred variant, the parallel strips advantageously have a width of between 4 and 12 mm, for example, of the order of 8 mm.

Alors, le collecteur composite se présente comme une alternance de bandes parallèles écrasées, séparées les unes des autres par des bandes non écrasées, la largeur des bandes non écrasées étant avantageusement comprise entre 12 et 50 mm. Then, the composite collector is presented as an alternation of crushed parallel strips, separated from each other by non-crushed strips, the width of the non-crushed strips being advantageously between 12 and 50 mm.

Le collecteur principal peut être un feuillard perforé, ou un feuillard non perforé destiné à constituer, par exemple, une paroi bipolaire. Quand les électrodes sont des électrodes pour accumulateur alcalin, les feuillards sont avantageusement en nickel ou acier nickelé. The main collector can be a perforated strip, or an unperforated strip intended to constitute, for example, a bipolar wall. When the electrodes are electrodes for an alkaline accumulator, the strips are advantageously made of nickel or nickel-plated steel.

Les structures tridimensionnelles peuvent être des mousses ou des feutres, par exemple des mousses ou feutres de nickel. The three-dimensional structures can be foams or felts, for example nickel foams or felts.

L'invention se rapporte également à un procédé qui donne toute satisfaction dans la réalisation du raccordement entre une structure tridimensionnelle servant de collecteur d'électrode et une feuille métallique servant de collecteur principal, le terme "raccordement" impliquant aussi bien le raccordement physique que le raccordement électrique, assurant une connexion électrique aussi parfaite que possible. The invention also relates to a method which gives all satisfaction in making the connection between a three-dimensional structure serving as an electrode collector and a metal sheet serving as the main collector, the term "connection" involving both the physical connection and the electrical connection, ensuring an electrical connection as perfect as possible.

Ce procédé se caractérise en ce qu'on comprime la structure tridimensionnelle sur une partie de sa surface pour y former des zones écrasées, puis qu'on raccorde la feuille métallique à la structure tridimensionnelle au moyen de lignes de soudure ou de successions de points de soudure au niveau des zones écrasées.  This process is characterized in that the three-dimensional structure is compressed over a part of its surface to form crushed zones there, and then the metallic foil is connected to the three-dimensional structure by means of welding lines or successions of points of weld at the level of the crushed areas.

De préférence, les lignes de soudure ou les successions de points de soudure sont situées sensiblement dans la partie médiane des zones écrasées. Preferably, the weld lines or the successions of weld points are located substantially in the middle part of the crushed areas.

L'invention sera mieux comprise en référence à l'exemple suivant, donné à titre purement illustratif et non limitatif. The invention will be better understood with reference to the following example, given purely by way of illustration and without limitation.

EXEMPLE
Avant leur fixation sur le feuillard, les structures tridimensionnelles (mousses ou feutres), sont préalablement écrasées pour y former des bandes dont la largeur est très supérieure au diamètre des points de soudure (donc généralement supérieure à 4 mm). Il s'ensuit que les bandes écrasées vont se trouver séparées les unes des autres par des bandes non écrasées ayant de préférence une largeur comprise entre 12 et 50 mm, par exemple, de l'ordre de 35 mm, bandes qui seront par la suite remplies de matière active et constitueront du point de vue électrique les bandes "actives". Le choix de la largeur des bandes actives dépend évidemment aussi de la capacité surfacique des électrodes et des régimes de charge et décharge.EXAMPLE
Before their attachment to the strip, the three-dimensional structures (foams or felts) are crushed beforehand to form bands whose width is much greater than the diameter of the weld points (therefore generally greater than 4 mm). It follows that the crushed strips will be separated from each other by non-crushed strips preferably having a width of between 12 and 50 mm, for example, of the order of 35 mm, strips which will subsequently be filled with active material and will constitute from the electrical point of view the "active" bands. The choice of the width of the active bands obviously also depends on the surface capacity of the electrodes and on the charge and discharge regimes.

Par exemple, pour une capacité surfacique de l'ordre de 45 mAh/cm2 et un régime n'excédant pas 2 C, la largeur des bandes actives (avant remplissage) sera de l'ordre de 40 mm. For example, for a surface capacity of the order of 45 mAh / cm2 and a speed not exceeding 2 C, the width of the active strips (before filling) will be of the order of 40 mm.

On procède alors à la soudure des bandes de mousse écrasées sur le feuillard en réalisant une ligne de soudure ou une succession de points de soudure, qui seront effectuées dans la zone médiane des bandes écrasées. We then weld the crushed foam strips on the strip by making a weld line or a succession of weld points, which will be carried out in the middle zone of the crushed strips.

Après remplissage des mousses par la matière active, on pourra sans difficulté procéder au compactage des électrodes.  After filling the foams with the active material, it will be possible without difficulty to compact the electrodes.

Cette opération peut avantageusement être effectuée, notamment pour l'obtention de l'épaisseur finale de l'électrode, par laminage. Dans ce cas, le sens de laminage sera avantageusement perpendiculaire à la longueur des bandes. This operation can advantageously be carried out, in particular for obtaining the final thickness of the electrode, by rolling. In this case, the rolling direction will advantageously be perpendicular to the length of the strips.

On constate, après compactage, que la matière active occupe une surface supérieure à la surface non écrasée des mousses avant compactage. It is noted, after compaction, that the active material occupies an area greater than the uncrushed surface of the foams before compaction.

L'existence d'une zone initialement non remplie par les matières actives, permet aux contraintes induites par le compactage de se libérer dans les zones déformables comprises entre la ou les soudures et le remplissage des matières actives.  The existence of a zone initially not filled with the active materials, allows the stresses induced by the compaction to be released in the deformable zones comprised between the weld (s) and the filling of the active materials.

Claims (12)

REVENDICATIONS 1. Collecteur composite comprenant une structure tridimensionnelle à porosité ouverte et une structure plane ou collecteur principal, caractérisé en ce que la structure tridimensionnelle présente des zones écrasées et en ce que le collecteur principal est raccordé à la structure tridimensionnelle par soudure au niveau des zones écrasées.1. Composite collector comprising a three-dimensional structure with open porosity and a flat structure or main collector, characterized in that the three-dimensional structure has crushed zones and in that the main collector is connected to the three-dimensional structure by welding at the level of the crushed zones . 2. Collecteur composite selon la revendication 1, caractérisé en ce que les zones écrasées se présentent sous forme de bandes parallèles.2. Composite collector according to claim 1, characterized in that the crushed zones are in the form of parallel strips. 3. Collecteur composite selon la revendication 2, caractérisé en ce que les bandes parallèles ont une largeur comprise entre 4 et 12 mm.3. Composite collector according to claim 2, characterized in that the parallel strips have a width of between 4 and 12 mm. 4. Collecteur composite selon la revendication 1, caractérisé par des bandes écrasées séparées les unes des autres par des bandes non écrasées.4. Composite collector according to claim 1, characterized by crushed strips separated from each other by non-crushed strips. 5. Collecteur composite selon la revendication 4, caractérisé en ce que la largeur des bandes non écrasées est comprise entre 12 et 50 mm.5. Composite collector according to claim 4, characterized in that the width of the non-crushed strips is between 12 and 50 mm. 6. Collecteur composite selon la revendication 1, caractérisé en ce que la structure tridimensionnelle est une mousse ou un feutre de nickel.6. Composite collector according to claim 1, characterized in that the three-dimensional structure is a foam or a nickel felt. 7. Collecteur composite selon la revendication 1, caractérisé en ce que le collecteur principal est un feuillard perforé.7. Composite collector according to claim 1, characterized in that the main collector is a perforated strip. 8. Collecteur composite selon la revendication 1, caractérisé en ce que le collecteur principal est un feuillard non perforé destiné à constituer une électrode bipolaire. 8. Composite collector according to claim 1, characterized in that the main collector is a non-perforated strip intended to constitute a bipolar electrode. 9. Procédé de fabrication d'un collecteur composite selon la revendication 1, caractérisé en ce qu'on comprime la structure tridimensionnelle sur une partie de sa surface pour y former des zones écrasées, puis qu'on raccorde le collecteur principal à la structure tridimensionnelle au moyen de lignes de soudure ou de successions de points de soudure au niveau des zones écrasées.9. A method of manufacturing a composite collector according to claim 1, characterized in that the three-dimensional structure is compressed over a part of its surface to form crushed zones there, and then that the main collector is connected to the three-dimensional structure by means of welding lines or successions of welding points at the level of the crushed zones. 10. Procédé de fabrication selon la revendication 9, caractérisé en ce que les lignes de soudure ou les successions de points de soudure sont situées sensiblement dans la partie médiane des zones écrasées.10. The manufacturing method according to claim 9, characterized in that the weld lines or the successions of weld points are located substantially in the middle part of the crushed areas. 11. Utilisation du collecteur selon la revendication 1 dans la fabrication d'électrodes par laminage, caractérisée en ce que le compactage des électrodes est tel que le sens du laminage est perpendiculaire à la longueur des bandes écrasées.11. Use of the collector according to claim 1 in the manufacture of electrodes by rolling, characterized in that the compacting of the electrodes is such that the direction of the rolling is perpendicular to the length of the crushed strips. 12. Utilisation selon la revendication 11 dans la fabrication d'électrodes pour accumulateur alcalin, caractérisée en ce que le collecteur principal est en nickel ou acier nickelé. 12. Use according to claim 11 in the manufacture of electrodes for an alkaline accumulator, characterized in that the main collector is made of nickel or nickel-plated steel.
FR9312098A 1993-10-06 1993-10-06 Composite collector for an electrode and method of manufacturing such a collector. Expired - Fee Related FR2711015B1 (en)

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FR9312098A FR2711015B1 (en) 1993-10-06 1993-10-06 Composite collector for an electrode and method of manufacturing such a collector.

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FR9312098A FR2711015B1 (en) 1993-10-06 1993-10-06 Composite collector for an electrode and method of manufacturing such a collector.

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FR2711015A1 true FR2711015A1 (en) 1995-04-14
FR2711015B1 FR2711015B1 (en) 1995-11-24

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0710995A3 (en) * 1994-11-07 1996-05-15 Sumitomo Electric Industries, Ltd. Electrode plate for battery and process for producing the same
EP0742600A1 (en) * 1995-05-09 1996-11-13 Matsushita Electric Industrial Co., Ltd. Electrodes for battery and method for fabricating the same
US5721073A (en) * 1995-10-09 1998-02-24 Matsushita Electric Industrial Co., Ltd. Electrodes for battery and method for fabricating the same
US5981108A (en) * 1995-10-09 1999-11-09 Matsushita Electric Industrial Co, Ltd. Electrodes for battery and method of fabricating the same
WO2000021149A1 (en) * 1998-10-07 2000-04-13 Matsushita Electric Industrial Co., Ltd. Electrode for battery, manufacturing method thereof, and apparatus for it

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FR1231142A (en) * 1959-04-07 1960-09-27 Accumulateurs Fixes Process for manufacturing sintered electrode bodies for electrochemical cells
US3055963A (en) * 1957-11-27 1962-09-25 Krebs Willi Porous electrodes
DE1671475A1 (en) * 1966-10-12 1971-09-23 Rheinisch Westfaelisches Elek Current collector framework for electrochemical cells made of a metallically solidified graphite base, such as graphite felt, graphite wool or graphite fabric
JPS62136756A (en) * 1985-12-10 1987-06-19 Matsushita Electric Ind Co Ltd Electrode plate for battery
DE3739735A1 (en) * 1987-11-24 1989-06-08 Peter Dr Faber Nickel fibre electrode and a method for its production
JPH01265452A (en) * 1988-04-18 1989-10-23 Toshiba Battery Co Ltd Manufacture of paste type electrode
FR2677812A1 (en) * 1991-06-13 1992-12-18 Sorapec Alkaline accumulator (battery) with bipolar electrodes and methods of manufacture
NL9102117A (en) * 1991-12-18 1993-02-01 Stork Screens Bv Porous metal-containing laminate and method for its production

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Publication number Priority date Publication date Assignee Title
US3055963A (en) * 1957-11-27 1962-09-25 Krebs Willi Porous electrodes
FR1231142A (en) * 1959-04-07 1960-09-27 Accumulateurs Fixes Process for manufacturing sintered electrode bodies for electrochemical cells
DE1671475A1 (en) * 1966-10-12 1971-09-23 Rheinisch Westfaelisches Elek Current collector framework for electrochemical cells made of a metallically solidified graphite base, such as graphite felt, graphite wool or graphite fabric
JPS62136756A (en) * 1985-12-10 1987-06-19 Matsushita Electric Ind Co Ltd Electrode plate for battery
DE3739735A1 (en) * 1987-11-24 1989-06-08 Peter Dr Faber Nickel fibre electrode and a method for its production
JPH01265452A (en) * 1988-04-18 1989-10-23 Toshiba Battery Co Ltd Manufacture of paste type electrode
FR2677812A1 (en) * 1991-06-13 1992-12-18 Sorapec Alkaline accumulator (battery) with bipolar electrodes and methods of manufacture
NL9102117A (en) * 1991-12-18 1993-02-01 Stork Screens Bv Porous metal-containing laminate and method for its production

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PATENT ABSTRACTS OF JAPAN vol. 11, no. 363 (E - 560) 26 November 1987 (1987-11-26) *
PATENT ABSTRACTS OF JAPAN vol. 14, no. 28 (E - 875) 19 January 1990 (1990-01-19) *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0710995A3 (en) * 1994-11-07 1996-05-15 Sumitomo Electric Industries, Ltd. Electrode plate for battery and process for producing the same
EP0742600A1 (en) * 1995-05-09 1996-11-13 Matsushita Electric Industrial Co., Ltd. Electrodes for battery and method for fabricating the same
US5721073A (en) * 1995-10-09 1998-02-24 Matsushita Electric Industrial Co., Ltd. Electrodes for battery and method for fabricating the same
US5981108A (en) * 1995-10-09 1999-11-09 Matsushita Electric Industrial Co, Ltd. Electrodes for battery and method of fabricating the same
WO2000021149A1 (en) * 1998-10-07 2000-04-13 Matsushita Electric Industrial Co., Ltd. Electrode for battery, manufacturing method thereof, and apparatus for it
US6656232B1 (en) 1998-10-07 2003-12-02 Matsushita Electric Industrial Co., Ltd. Electrode for battery, manufacturing method thereof, and apparatus for it

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Publication number Publication date
FR2711015B1 (en) 1995-11-24

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