EP1201003A2 - Rechargeable ni/zn cell with soluble zinc anodes - Google Patents

Rechargeable ni/zn cell with soluble zinc anodes

Info

Publication number
EP1201003A2
EP1201003A2 EP01916991A EP01916991A EP1201003A2 EP 1201003 A2 EP1201003 A2 EP 1201003A2 EP 01916991 A EP01916991 A EP 01916991A EP 01916991 A EP01916991 A EP 01916991A EP 1201003 A2 EP1201003 A2 EP 1201003A2
Authority
EP
European Patent Office
Prior art keywords
rechargeable
plates
cell according
cell
auxiliary electrode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP01916991A
Other languages
German (de)
French (fr)
Inventor
Waldemar Solopa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Accumulatorenwerk Hoppecke Carl Zoellner and Sohn KG
Original Assignee
Accumulatorenwerk Hoppecke Carl Zoellner and Sohn KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Accumulatorenwerk Hoppecke Carl Zoellner and Sohn KG filed Critical Accumulatorenwerk Hoppecke Carl Zoellner and Sohn KG
Publication of EP1201003A2 publication Critical patent/EP1201003A2/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
    • 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
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/463—Separators, membranes or diaphragms characterised by their shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0468—Compression means for stacks of electrodes and separators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/24—Alkaline accumulators
    • H01M10/28—Construction or manufacture
    • H01M10/281—Large cells or batteries with stacks of plate-like electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/24—Alkaline accumulators
    • H01M10/28—Construction or manufacture
    • H01M10/286—Cells or batteries with wound or folded electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M6/00—Primary cells; Manufacture thereof
    • H01M6/50—Methods or arrangements for servicing or maintenance, e.g. for maintaining operating temperature
    • H01M6/5005—Auxiliary electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/24—Alkaline accumulators
    • H01M10/30—Nickel accumulators
    • 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
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/46—Separators, membranes or diaphragms characterised by their combination with 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the description refers to rechargeable Ni/Zn cells with soluble zinc anodes.
  • Ni/Zn cells with soluble zinc anodes are in an early stage of development at present. Particular features of these cells make them attractive as source of energy for electric vehicles. Works concerning this field have been focused mainly on electrolysis of alkali zincate solutions. The state of the art is described e.g. in the following references
  • the technical solution consists in providing a rechargeable Ni/Zn cell with soluble zinc anodes, comprising a stack of alternately arranged negative and positive plates, whereby adjacent plates are arranged with a fixed distance to each other to allow free movement of electrolyte and zinc particles between the plates.
  • the described technical solution concerns the way of oxidizing and dissolving the shedded, incoherent zinc particles. Oxidizing and dissolving the undesired residues is strictly connected with constructions and the way of charging of a cell utilizing such collectors.
  • the distance between adjacent plates is maintained by means of spacing elements fixed at least to one of said plates. So a defined space can be reproduced between the plates easily.
  • Said spacing elements can be spacing slugs fastened in holes made in one of the positive or negative plates. So a constant distance between conducting parts of the negative current collectors and surfaces of adjacent positive plates is maintained with the help of said spacing slugs. Those slugs can easily be produced and mounted to the plates. This construction is economic and a free flow of electrolyte and particles is guaranteed.
  • a third auxiliary electrode is positioned.
  • This additional electrode enables to avoid the drawbacks of the state of the art especially during charging.
  • said auxiliary electrode is being alternately electrically parallel connected with a positive and negative terminal of the cell during charge. This results in greater oxidizing of zinc at the lowest edges of current collectors and connections with negative terminal, and also in oxidizing and dissolving some zinc particles which have already fallen down to the bottom of the cell and/or connections with positive terminal.
  • said auxiliary electrode is permeable for electrolyte. So electrolyte-circulation is improved and colletion of zinc particles possible.
  • said stack is arranged such that in operation said plates are arranged in a vertical position and said third auxiliary electrode is positioned horizontally under said stack. So falling particles are slummed down by electrolyte.
  • said stack and said third auxiliary electrode are arranged inside a closed housing and electrical positive and negative terminals are located outside said housing and connected to said plates respectively. Furthermore a third electrical terminal is located outside said housing and connected to said auxiliary electrode. So a useful and improved Ni/Zn cell is provided where cycling does not result in thickering of the lowest edges of negative current collectors and also not in an accumulation of incoherent particles of zinc at the bottom of cell container. Furthermore the Ni/Zn cell can be produced economic and easy and is reliable in operation.
  • Figure 1 a schematic crossection l-l of figure 2 of a negative plate current collector according to one embodiment of the invention
  • Figure 2 a schematic front view of the negative plate current collector according to Fig. 1 and
  • Figure 3 a schematic crossection of cells container according to an embodiment of the invention.
  • the main body of the current collector is made of flat, smooth plate (1 ). In the plate there are drilled holes (3). The holes serve as places where spacing slugs (2) are fastened.
  • spacing slugs means cylindrical, small elements/diameter about one millimetre made of an insulator. These slugs stand out of the collectors surface. The main role of spacing slugs is to maintain constant distance between conducting parts of adjacent plates. Number of spacing slugs depends on rigidity of introduced positive plates. Practically, one slug is sufficient to secure one square centimetre of adjacent plates. Described construction of current collectors enables unrestricted movement of incoherent zinc particles.
  • Constant distance between adjacent plates can bs also maintained with the help of specially shaped separators. They can be corrugated, perforated type or similar to, described above, negative current collectors construction (with small spacing slugs). The main principles are: to maintain distance between plates, to restrict movement of incoherent zinc particles as few as possible.
  • a secondary cell utilizing such current collectors should consist of even number of negative and odd number of positive plates.
  • a third, auxiliary electrode (5) Under the stack of plates, at the bottom of the cell, there is located a third, auxiliary electrode (5).
  • the third electrode is being alternately parallely connected with positive and negative terminal of the cell. Duration of these connections can vary in wide ranges, depending on construction and size of particular cell.
  • the action of the auxiliary electrode should result in greater oxidizing of zinc at the lowest edges of current collectors (connections with negative terminal), and also in oxidizing and dissolving some zinc particles which have already fallen down to the bottom of the cell (connections with positive terminal). Duration of particular connections should be enough to fulfil both of these conditions.
  • connections duration should be equal and should last about twenty seconds each. Elvolving gases should be catalitically recombined. It is the best if arrangement responsible for the auxiliary electrode connections is a part of charging device.
  • the main body of current collector should be made of smooth plate (1 ).
  • the spacing slugs can be made of polyethylene or similar material (2).
  • the third, auxiliary electrode (5) should be made of nickel net. It must be connected with terminal located outside the cell container (4).
  • the auxiliary electrode should be located above the bottom of the cell container (to separate mud falling from positives). The whole container and, at the same time, location of auxiliary electrode are shown on figure 3.
  • Device responsible for the third electrode connections should be a part of charging device. Charging of prototype cells were performed with the help of unit based on Polish patent application No P-316861 ("Thyrystor tripping method and a charching device based on such system"). The unit was supplemented with simple electronic "timer". Electrolyte was made of 8M KOH solution, supersaturated with zinc oxide (about 1.9M ZnO solution). Such supersaturated zincate solution was stabilized by about 0.6% addition of potassium silicate. Positives were sintered and nickel felt type.
  • the invention allows the possibility of reduction in amount of cadmium being used in battery industry today. From economic point of view construction of large and, at the same time, fairly cheap cells is possible.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Secondary Cells (AREA)

Abstract

To provide a Ni/Zn cell where cycling does not result in thickering the lowest edges of negative current collectors and also in accumulating incoherent particles of zinc at the bottom of cell container, a rechargeable Ni/Zn cell is provided with soluble zinc anodes, comprising a stack of alternately arranged negative and positive plates, whereby adjacent plates are arranged with a fixed distance to each other to allow free movement of electrolyte and zinc particles between the plates.

Description

Rechargeable Ni/Zn cell with soluble zinc anodes
The description refers to rechargeable Ni/Zn cells with soluble zinc anodes.
The Ni/Zn cells with soluble zinc anodes are in an early stage of development at present. Particular features of these cells make them attractive as source of energy for electric vehicles. Works concerning this field have been focused mainly on electrolysis of alkali zincate solutions. The state of the art is described e.g. in the following references
Ref 1 : Journal of Power Sources, 34 /1991/, pp 243-255
Ref 2: Journal of Power Sources, 5 /19807, pp 235-244
Ref 3: Chimiczeskije Istoczniki Toka, Moskwa 1968, pp 304-333
Difficulties appeared at attempts to maintain proper quality of zinc layer during pronounced cell cycling. The difficulties start with the fact that deep discharges cause some limited negative active mass shedding. Cycling results in thickering the lowest edges of negative current collectors and also in accumulating incoherent particles of zinc at the bottom of cell container.
It is an object of the invention to provide a Ni/Zn cell where the described drawbacks can be avoided.
The technical solution consists in providing a rechargeable Ni/Zn cell with soluble zinc anodes, comprising a stack of alternately arranged negative and positive plates, whereby adjacent plates are arranged with a fixed distance to each other to allow free movement of electrolyte and zinc particles between the plates.
The described technical solution concerns the way of oxidizing and dissolving the shedded, incoherent zinc particles. Oxidizing and dissolving the undesired residues is strictly connected with constructions and the way of charging of a cell utilizing such collectors.
According to one preferred aspect of the invention the distance between adjacent plates is maintained by means of spacing elements fixed at least to one of said plates. So a defined space can be reproduced between the plates easily. Said spacing elements can be spacing slugs fastened in holes made in one of the positive or negative plates. So a constant distance between conducting parts of the negative current collectors and surfaces of adjacent positive plates is maintained with the help of said spacing slugs. Those slugs can easily be produced and mounted to the plates. This construction is economic and a free flow of electrolyte and particles is guaranteed.
According to a further aspect of the invention crosswise to said stack of positive and negative plates a third auxiliary electrode is positioned. This additional electrode enables to avoid the drawbacks of the state of the art especially during charging. With advantage said auxiliary electrode is being alternately electrically parallel connected with a positive and negative terminal of the cell during charge. This results in greater oxidizing of zinc at the lowest edges of current collectors and connections with negative terminal, and also in oxidizing and dissolving some zinc particles which have already fallen down to the bottom of the cell and/or connections with positive terminal. This is improved in that said auxiliary electrode is permeable for electrolyte. So electrolyte-circulation is improved and colletion of zinc particles possible. Usually said stack is arranged such that in operation said plates are arranged in a vertical position and said third auxiliary electrode is positioned horizontally under said stack. So falling particles are slummed down by electrolyte.
For practical use said stack and said third auxiliary electrode are arranged inside a closed housing and electrical positive and negative terminals are located outside said housing and connected to said plates respectively. Furthermore a third electrical terminal is located outside said housing and connected to said auxiliary electrode. So a useful and improved Ni/Zn cell is provided where cycling does not result in thickering of the lowest edges of negative current collectors and also not in an accumulation of incoherent particles of zinc at the bottom of cell container. Furthermore the Ni/Zn cell can be produced economic and easy and is reliable in operation.
Further features and advantages become obvious from the following description of embodiments in connection with the drawings. It is shown in
Figure 1 a schematic crossection l-l of figure 2 of a negative plate current collector according to one embodiment of the invention;
Figure 2 a schematic front view of the negative plate current collector according to Fig. 1 and
Figure 3 a schematic crossection of cells container according to an embodiment of the invention.
The main body of the current collector is made of flat, smooth plate (1 ). In the plate there are drilled holes (3). The holes serve as places where spacing slugs (2) are fastened. The notion "spacing slugs", means cylindrical, small elements/diameter about one millimetre made of an insulator. These slugs stand out of the collectors surface. The main role of spacing slugs is to maintain constant distance between conducting parts of adjacent plates. Number of spacing slugs depends on rigidity of introduced positive plates. Practically, one slug is sufficient to secure one square centimetre of adjacent plates. Described construction of current collectors enables unrestricted movement of incoherent zinc particles. Constant distance between adjacent plates can bs also maintained with the help of specially shaped separators. They can be corrugated, perforated type or similar to, described above, negative current collectors construction (with small spacing slugs). The main principles are: to maintain distance between plates, to restrict movement of incoherent zinc particles as few as possible.
An ideal solution is when there is nothing between the adjacent plates (apart from electrolyte). Practically, however, plates must be mechanically supported.
A secondary cell utilizing such current collectors should consist of even number of negative and odd number of positive plates. Under the stack of plates, at the bottom of the cell, there is located a third, auxiliary electrode (5). During charge, the third electrode is being alternately parallely connected with positive and negative terminal of the cell. Duration of these connections can vary in wide ranges, depending on construction and size of particular cell. The action of the auxiliary electrode should result in greater oxidizing of zinc at the lowest edges of current collectors (connections with negative terminal), and also in oxidizing and dissolving some zinc particles which have already fallen down to the bottom of the cell (connections with positive terminal). Duration of particular connections should be enough to fulfil both of these conditions.
Practically, connections duration should be equal and should last about twenty seconds each. Elvolving gases should be catalitically recombined. It is the best if arrangement responsible for the auxiliary electrode connections is a part of charging device.
The main body of current collector should be made of smooth plate (1 ). The spacing slugs can be made of polyethylene or similar material (2). The third, auxiliary electrode (5) should be made of nickel net. It must be connected with terminal located outside the cell container (4). The auxiliary electrode should be located above the bottom of the cell container (to separate mud falling from positives). The whole container and, at the same time, location of auxiliary electrode are shown on figure 3. Device responsible for the third electrode connections should be a part of charging device. Charging of prototype cells were performed with the help of unit based on Polish patent application No P-316861 ("Thyrystor tripping method and a charching device based on such system"). The unit was supplemented with simple electronic "timer". Electrolyte was made of 8M KOH solution, supersaturated with zinc oxide (about 1.9M ZnO solution). Such supersaturated zincate solution was stabilized by about 0.6% addition of potassium silicate. Positives were sintered and nickel felt type.
In the main body of current collector (1 ) there are drilled holes (3), where spacing slugs (2) are fastened. In the main body of current collector (1 ), there are distributed spacing slugs (2). The nickel net auxiliary electrode (5) is connected with current terminal (4). Auxiliary electrode is located above the bottom of cells container (to separate mud falling from positives).
The invention allows the possibility of reduction in amount of cadmium being used in battery industry today. From economic point of view construction of large and, at the same time, fairly cheap cells is possible.

Claims

Patent claims.
1. Rechargeable Ni/Zn cell with soluble zinc anodes, comprising a stack of alternately arranged negative and positive plates, characterized . in that adjacent plates are arranged with a fixed distance to each other to allow free movement of electrolyte and zinc particles between the plates.
2. Rechargeable Ni/Zn cell according to claim 1 , characterized in that the distance between adjacent plates is maintained by means of spacing elements fixed at least to one of said plates.
3. Rechargeable Ni/Zn cell according to claim 2, characterized in that said spacing elements are spacing slugs fastened in holes made in the negative plates.
4. Rechargeable Ni/Zn cell according to claim 2, characterized in that a constant distance between conducting parts of the negative current collectors and surfaces of adjacent positive plates is maintained with the help of said spacing slugs.
5. Rechargeable Ni/Zn cell according to claim 1 , characterized in that crosswise to said stack a third auxiliary electrode is positioned.
6. Rechargeable Ni/Zn cell according to claim 5, characterized in that said auxiliary electrode is being alternately electrically parallel connected with a positive and negative terminal of the cell during charge.
7. Rechargeable Ni/Zn cell according to claim 5, characterized in that said auxiliary electrode is permeable for electrolyte.
8. Rechargeable Ni/Zn cell according to claim 1 , characterized in that said stack is arranged such that in operation said plates are arranged in a vertical position and said third auxiliary electrode is positioned horizontally under said stack.
. Rechargeable Ni/Zn cell according to claim 8, characterized in that said stack and said third auxiliary electrode are arranged inside a closed housing and electrical positive and negative terminals are located outside said housing and connected to said plates respectively.
10. Rechargeable Ni/Zn cell according to claim 8, characterized in that a third electrical terminal is located outside said housing and connected to said auxiliary electrode.
EP01916991A 2000-02-14 2001-02-13 Rechargeable ni/zn cell with soluble zinc anodes Withdrawn EP1201003A2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
PL33840700 2000-02-14
PL00338407A PL338407A1 (en) 2000-02-14 2000-02-14 Anode current collector and special design of ni-zn voltaic cells incorporating anodes with such current collectors
PCT/EP2001/001573 WO2001059867A2 (en) 2000-02-14 2001-02-13 Rechargeable ni/zn cell with soluble zinc anodes

Publications (1)

Publication Number Publication Date
EP1201003A2 true EP1201003A2 (en) 2002-05-02

Family

ID=20076050

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01916991A Withdrawn EP1201003A2 (en) 2000-02-14 2001-02-13 Rechargeable ni/zn cell with soluble zinc anodes

Country Status (4)

Country Link
EP (1) EP1201003A2 (en)
CA (1) CA2366567A1 (en)
PL (1) PL338407A1 (en)
WO (1) WO2001059867A2 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1496326B1 (en) * 1965-05-13 1970-10-15 Varta Ag Process for the production of electrode packages for fuel elements
FR2096365A7 (en) * 1970-06-23 1972-02-11 Varta Ag
DE2422577C3 (en) * 1974-05-09 1979-10-11 Deutsche Automobilgesellschaft Mbh, 3000 Hannover Rechargeable galvanic cell and method of operating this cell
IL50024A (en) * 1976-07-12 1979-05-31 Israel State Secondary cells
JPS5543769A (en) * 1978-09-22 1980-03-27 Japan Storage Battery Co Ltd Layer-built wet cell
EP0048559A3 (en) * 1980-09-24 1982-08-11 General Electric Company Pile structure and method of making same
DE19809665B4 (en) * 1998-03-06 2009-02-19 Hoppecke Batterie Systeme Gmbh Accumulator with a separator combination

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0159867A2 *

Also Published As

Publication number Publication date
WO2001059867A2 (en) 2001-08-16
CA2366567A1 (en) 2001-08-16
WO2001059867A3 (en) 2002-02-14
PL338407A1 (en) 2001-08-27

Similar Documents

Publication Publication Date Title
Chakkaravarthy et al. Zinc—air alkaline batteries—A review
US5318861A (en) Electrochemical metal-air cell and electrically and mechanically rechargeable anodes for use therein
Müller et al. Optimized zinc electrode for the rechargeable zinc–air battery
US3378406A (en) Metal-oxygen-containing electro-chemical battery
US4113921A (en) Secondary cells
US4039729A (en) Rechargeable galvanic cell with zinc electrode and auxiliary structure
US3069486A (en) Electrochemical electrode structure
KR100687273B1 (en) Electrode unit for rechargeable electrochemical cell
CA2154212A1 (en) Rechargeable Batteries Having a Specific Anode and Process for the Production of Them
US5059496A (en) Nickel-hydrogen battery with oxygen and electrolyte management features
US4957830A (en) Rechargeable metal oxide-hydrogen battery
US3607403A (en) Self-charging battery incorporating a solid-gas battery and storage battery within a honeycomb matrix
SE446489B (en) ENDED, RECHARGEABLE BATTERY WITH NEGATIVE LANTANNICKEL HYDRADE ELECTRODE AND POSITIVE METAL OXIDE ELECTRODE
US3551208A (en) Cell with displaceable electrode
KR101123636B1 (en) Cartridge seperate type metal-air battery
GB2023918A (en) Galvanic cell
US3288642A (en) Rechargeable dry cell having gelled electrolyte
US6680140B1 (en) Maintenance-free industrial type vented cell storage battery
US3907603A (en) Storage cell with dissoluble negative line electrodes
US3076860A (en) Battery arrangement
EP1201003A2 (en) Rechargeable ni/zn cell with soluble zinc anodes
RU2264004C2 (en) Rechargeable electrochemical cell
CA2172975A1 (en) Alkaline storage cell
US3505115A (en) Alkaline battery
US3457488A (en) Method of recharging an electrochemical cell

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20011114

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 20020906