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Assignee: Varta Batterie Aktiengesellschaft


Location: Hanover, DE
No. of patents: 158

1        
NumberTitleIssue Date
6200699Mercury-free primary alkaline cell
A galvanic cell has an anode gel, an alkaline electrolyte, and a cathode material, separated from the anode gel by a separator. The anode gel has mercury-free zinc powder, and the cathode material has manganese dioxide, as well as salt-like calcium compou...
03/13/2001
6183910Electrochemical lithium secondary element
Suitable as active cathode material for an electrochemical lithium secondary cell are oxygen-deficient spinels Li1+x Mn2-x O4-δ , where 0ࣘxࣘ0.33 and 0.01ࣘδࣘ0.5. Their region of existence in a phase diagram l...
02/06/2001
6146783Multi-cell storage battery
A multi-cell storage battery, in particular to a lithium storage battery, which contains a temperature control device and in which groups of one or more individual cells arranged alongside one another are separated from one another by a thermally insulati...
11/14/2000
6110433Process for the recovery of metals from used nickel/metal/rare earth hydride storage batteries
The invention relates to a process for recovering metals from used nickel/hydride storage batteries, in which storage battery scrap has been mechanically comminuted and divided into at least a coarse fraction and a fine fraction capable of being treated s...
08/29/2000
6103416Laminated lithium-ion cell and process for fabricating same
The invention relates to a laminated lithium-ion cell which comprises flexible layers, wherein the negative electrode is lithium metal, lithium alloy or a metallic bonded fiber web or a foam, which comprises a lithium-intercalating material such as carbon...
08/15/2000
6077627Polymer electrolyte and method for preparing same
The invention relates to a method for preparing polymer electrolytes for rechargeable lithium intercalation cells which contain a dissociable lithium salt dispersed in a polymeric matrix, the polymeric matrix being a self-supporting film of a copolymer of...
06/20/2000
6066184Voltaic cell
In a voltaic cell, especially in the form of a button cell, with a metal housing sealed liquid-tight including a cell cup and a cell lid electrically insulated against it by a seal, the seal is formed from a sealing part produced by deep drawing from a pl...
05/23/2000
6060194Button cell with retaining ring for anode
The invention relates to a rechargeable button cell, which contains negative and positive electrodes in the form of tablets separated by a separator and an alkaline electrolyte in a casing which is formed from a lower part in the form of a cup and an uppe...
05/09/2000
6027830Battery having an electrode mounting cage and method for its manufacture
An electrode set (i.e., a separator between two electrodes) is placed within an electrically nonconductive mounting cage prior to sealing the mounting cage/electrode set assembly within a battery container having a cup-shaped lower part and a lid-shaped u...
02/22/2000
6025093Lithium ion cell
The invention relates to a lithium ion cell, comprising a positive electrode which contains a chalkogen compound, containing lithium, of a transition metal, a non-aqueous electrolyte and a negative electrode which is separator-isolated and contains carbon...
02/15/2000
6007944Rechargeable lithium-ion cell
The invention relates to a rechargeable lithium-ion cell, a method for its manufacture, and its application. The cell is distinguished by the fact that it has a metallic housing (21) which is electrically insulated internally by two half shells (15), whic...
12/28/1999
5974303Locking mechanism for battery housings
A battery housing for an electrical device, such as a portable telephone, has a locking mechanism that locks the battery housing in place onto the housing of the portable device. The locking mechanism has a locking finger that is inserted into an opening ...
10/26/1999
5919588Cathode additive for alkaline primary cells
The invention relates to alkaline primary cells comprising a zinc gel as the anode material, an aqueous alkaline electrolyte, a separator and a cathode material containing manganese dioxide, wherein the cathode material comprises 0.1-5% by weight of alkal...
07/06/1999
5858061Process for the recovery of metals from used nickel/metal hydride storage batteries
In the recycling of used nickel/metal hydride storage batteries, the battery scrap is dissolved in sulphuric acid after mechanical separation of the coarse constituents by magnetic and air separation. A solvent extraction is performed with the digestion s...
01/12/1999
5800947Gastight, sealed alkaline storage battery in the form of a button cell
A Ni/Cd or Ni/hydride storage battery of the button cell type has a positive electrode tablet based on a nickel hydroxide powder having an active mass comprised of spherical particles with a high pycnometric density (d>3.5 g/cm3). In contrast t...
09/01/1998
5786108Electrochemical cell
A prismatic electrochemical cell includes electrode plate blocks in which the stacked positive and negative electrode plates are separated by separators and are connected by current conductors to the corresponding terminal posts by crimping current conduc...
07/28/1998
5766798Prismatic galvanic cell having a current topping lug
A prismatic galvanic cell having a large number of electrode pairs separated by separators is provided with electrode plates having current tapping lugs which extend from upper or lateral edges of the plates, and which include flexible tongues extending a...
06/16/1998
5738958Alloys for use as active material for the negative electrode of an alkaline, rechargeable nickel-metal hydride battery, and process for its production
To provide an improved high-temperature cycle lifetime, an alloy for use as active material for the negative electrode of an alkaline, rechargeable nickel-metal hydride battery has the composition Mm1-u Eu Niv Cow Al...
04/14/1998
5738953Alkaline metal oxide/metal hydride battery
As an active material for its negative electrode, a hydrogen storage alloy for a Ni/H battery has the composition MmNiv Alw Mnx Coy Mz, where Mm is a misch metal, M is Fe, Cu, or a mixture of Fe and Cu, and ...
04/14/1998
5660944Multicell storage battery
A multicell storage battery, especially of the nickel/hydride type, is provided with pressure safeties for protection against high internal pressures. The pressure safeties respond at a preassigned critical pressure, causing mechanical changes in shape or...
08/26/1997
5639569Gastight, sealed metal oxide/metal hydride storage battery
A gastight, sealed metal oxide/metal hydride storage battery, in particular, a nickel/metal hydride button cell, includes an auxiliary electrode with an active material composed of the same hydrogen storage alloy as that of the negative electrode with whi...
06/17/1997
5538809Automatic coupling system for traction batteries
A coupling for connecting a battery to a battery charger of a replacement station for electric road vehicles equipped with exchangeable batteries receivable upon a roller conveyor associated with the replacement station, or to a battery charger of the own...
07/23/1996
5514495Negative electrode for gastight alkaline storage batteries having a carbon-black-containing gas-consumption layer
A carbon-black-containing gas-consuming layer on the surface of a negative electrode is produced from a mixture of an aqueous carbon black dispersion and an aqueous PTFE dispersion, both of which contain a surfactant of the same type (either cationic, ani...
05/07/1996
5514488Electrochemical secondary cell
An Li/LiMn2 O4 secondary cell employing a SWING system (i.e., of the "rocking chair cell" type) includes a positive electrode formed as a metal gauze-reinforced, rolled electrode, and a negative electrode formed by impregnating a nic...
05/07/1996
5503949Plate block for lead batteries
In a plate block for lead batteries having plates of one polarity with plate lugs which are thicker than the plate lugs of the plates of the other polarity, an equalization of the volumes and of the areas of the two lug types is achieved by providing the ...
04/02/1996
5500309Ni/metal hydride accumulator
The positive electrode of a Ni/metal hydride accumulator is formed from a mass mixture of Ni(OH)2 and an oxidation-resistant graphite. The stable graphite is notable for a high degree of crystallinity and a low ash content. In conventional Ni/m...
03/19/1996
5496664Process for producing a positive electrode for lithium secondary batteries
An active material for a positive electrode for lithium secondary batteries and composed of a lithium-manganese oxide (Lix Mn2 O4) with a spinel structure is produced by mixing manganese dioxide with lithium formate (HCOOL...
03/05/1996
5486433Button cell
A button cell containing electrodes having a polygonal shape, preferably square or hexagonal, in a flat housing is advantageous when compared to such cells having conventional round pressed powder electrodes. The electrodes can be cut from a continuously ...
01/23/1996
5460730Process and apparatus for treating wastewater from lead battery production
Lead oxide is used for neutralizing the sulfuric acid wastewater received from washing charged (formed) electrodes during lead battery production. The neutralization product, including lead sulfate and excess lead oxide, is returned directly to production...
10/24/1995
5447806Gas-tight sealed nickel/hydride battery
A gas-tight nickel/hydride battery with a high oxygen consumption rate and a correspondingly low internal pressure has a stacked arrangement of positive and negative electrodes wherein the negative electrodes are divided in two with a coarse supporting fr...
09/05/1995
5407760Sealing plug for a lead battery
A sealing plug for a lead battery which prevents both the emergence of acid mist from the cell, and its harmful effects on the operation of the safety valve of the sealing plug, is configured to cause escaping cell gases to follow a path to the outside of...
04/18/1995
5389467Rechargeable galvanic lithium cell
Nontoxic, chemically stable lithium tris(fluorosulphonyl)methanide, LiC(SO2 F)3, is used as a conducting salt for rechargeable lithium cells containing nonaqueous electrolytes based on esters or polymeric electrolytes such as polyeth...
02/14/1995
5338596Process for producing a lead storage battery with a thixotropic gel electrolyte
A lead storage battery is filled with electrolyte in two steps. In a first step, the filling electrolyte is a sulfuric acid which does not contain a gelling agent, and the amount of electrolyte introduced into the battery casing is selected so that the el...
08/16/1994
5329681Process for preparing the porous metallic framework of an electrode carrier for the attachment of a take-off conductor
Discrete locations of an electrode web or electrode segment based on a porous metallic carrier framework, which are intended to receive the take-off conductor, are briefly heated to about 450° C. and then cleared of active mass with compressed air. The h...
07/19/1994
5215215Method and apparatus for introducing viscous active ingredients into the case of galvanic cell
Viscous active ingredients are introduced into the case of a galvanic cell by extrusion from a nozzle fed with the ingredients by a pumping device. The pumping device includes an elastic, substantially straight piece of hose, and a pressure roll which can...
06/01/1993
5203455Package for zinc-air batteries
A push-through, blister card package for zinc-air batteries includes a cardboard support to which is sealed a transparent plastic foil with cup-shaped recesses for holding button cells. The battery bases, which are provided with air supply holes, are atta...
04/20/1993
5192628Alkaline electrolyte for galvanic elements
Surface rich forms of magnesium hydroxide and/or basic magnesium salts, or titanium (IV) oxide, preferably with lye or an aqueous potassium carbonate solution in weight ratios of between about 1:0.5 and 1:2, or between about 1:1.5 and 1:4.5, respectively,...
03/09/1993
5169736Electrochemical secondary element
An electrochemical secondary element with a non-aqueous electrolyte, whose charge/discharge mechanism is predicated upon the reversible intercalation of active Li+ ions in electrode materials having an open skeletal structure. The positive electrode is es...
12/08/1992
5162176Electrochemical secondary element
In a lithium secondary cell of the intercalation type, with a positive electrode which includes a lithiated transition metal oxide Lix My O2, wherein 0.5ࣘx/yࣘ1.0 and M is a metal from Groups VIIb and VIIIb (preferably ...
11/10/1992
5158722Process for the production of a positive electrode in ribbon form for primary and secondary cells
Positive ribbon electrodes for primary and secondary cells are produced in a dry process wherein two strips of active material in powder form, preferably comprised of MnO2, FeS2, CuO, ଱-Cu2 V2 O7
10/27/1992
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