Patents Assigned to Varta Batterie Aktiengesellschaft
  • Method for improving wettability of high temperature cell separators
    Patent number: 4242427
    Abstract: Separators for electrochemical high temperature cells with molten electrolytes, particularly consisting of the raw materials boron nitride or aluminum nitride, become better wettable through treatment with boron trifluoride. Preferably the separator, e.g. a BN fabric, may be sprinkled with a BF.sub.3 yielding material, e.g. KBF.sub.4 and activated through brief heating to about 400.degree. C.
    Type: Grant
    Filed: November 7, 1979
    Date of Patent: December 30, 1980
    Assignee: Varta Batterie, Aktiengesellschaft
    Inventor: Gerhard Sterr
  • Gas-tight galvanic cell
    Patent number: 4215187
    Abstract: The electrodes and separators are assembled into a plate package, which is slipped over a post extending upward from the cell housing bottom. Pole lead-through is provided in the lid, the lead-through includes a rivet and a sealing ring. The edges of the housing bottom and the tip of the post are welded to the lid to close the cell.
    Type: Grant
    Filed: August 2, 1978
    Date of Patent: July 29, 1980
    Assignee: Varta Batterie Aktiengesellschaft
    Inventors: Bernd Gnida, Gerhard Simon, Eckart Buder, Hans-Jurgen Schwartz
  • Pole seal for storage batteries
    Patent number: 4212934
    Abstract: The battery pole extends through a tubular opening in the plastic battery lid. The pole shaft is surrounded by a synthetic plastic mantle which adjoins the tubular opening in frictionally sealing manner.
    Type: Grant
    Filed: October 10, 1978
    Date of Patent: July 15, 1980
    Assignee: Varta Batterie Aktiengesellschaft
    Inventor: Klaus Salamon
  • Galvanic cell with alkaline electrolyte
    Patent number: 4209578
    Abstract: An Ag layer is formed upon an Ag.sub.2 O electrode by introducing a chemical reducing agent in such a manner that the transformation takes place after the electrode is already in place in the cell cup.
    Type: Grant
    Filed: December 20, 1978
    Date of Patent: June 24, 1980
    Assignee: Varta Batterie Aktiengesellschaft
    Inventor: Helmut Balters
  • Negative, highly active iron electrode
    Patent number: 4207383
    Abstract: A negative, highly active iron electrode for an electrical storage battery is coated with a sulfur based protective layer to impede premature oxidation and increase charge capacity.
    Type: Grant
    Filed: May 5, 1978
    Date of Patent: June 10, 1980
    Assignee: Varta Batterie Aktiengesellschaft
    Inventor: V. Anthony Oliapuram
  • Battery electrode with expander
    Patent number: 4189532
    Abstract: Expander is introduced into the negative electrode in the form of particles encapsulated with material which gradually releases the expander over the life of the battery.
    Type: Grant
    Filed: July 26, 1978
    Date of Patent: February 19, 1980
    Assignee: Varta Batterie Aktiengesellschaft
    Inventor: Hans-Joachim Golz
  • Storage battery with aqueous electrolyte and recombiner
    Patent number: 4180624
    Abstract: Bi-directional valve means are provided between the interior and the ambient, opening outward at a predetermined internal overpressure, and inward at a predetermined underpressure.
    Type: Grant
    Filed: January 24, 1979
    Date of Patent: December 25, 1979
    Assignee: Varta Batterie Aktiengesellschaft
    Inventor: August Winsel
  • Application of active mass to porous electrode support structures
    Patent number: 4172909
    Abstract: Precipitation of metal salts from solution onto the electrode support structure takes place in several consecutive stages, with the precipitating solution caused to move countercurrent to the electrodes being impregnated.
    Type: Grant
    Filed: August 11, 1977
    Date of Patent: October 30, 1979
    Assignee: Varta Batterie Aktiengesellschaft
    Inventor: August Winsel
  • Electrode and manufacturing method therefor
    Patent number: 4160747
    Abstract: An electrode for a primary cell is produced by first mixing a solid depolarizer, carbon, and a water-insoluble organic polymer binder. The mixture is then molded into an electrode body. The binder is in the mixture in the form of a dispersion in a hydrophilic medium.
    Type: Grant
    Filed: January 27, 1978
    Date of Patent: July 10, 1979
    Assignee: Varta Batterie Aktiengesellschaft
    Inventors: Gerhard Schneider, Werner Riedl, Hans-Martin Lippold
  • High energy electrochemical current source
    Patent number: 4158722
    Abstract: In a galvanic element having a negative metal electrode, and non-aqueous electrolyte, the electrochemically reducible component of the positive electrode mass is a chromium oxide of the formula CrO.sub.x, where x lies in the range between 2 and 2.9.
    Type: Grant
    Filed: May 31, 1978
    Date of Patent: June 19, 1979
    Assignee: Varta Batterie Aktiengesellschaft
    Inventors: Helmut Lauck, Franz-Josef Kruger
  • Positive electrode for storage battery
    Patent number: 4148978
    Abstract: The active mass is supported by an antimony free or antimony poor grid having embedded therein antimony-containing storage bodies from which the antimony is released in controlled manner during the life span of the electrode.
    Type: Grant
    Filed: November 23, 1977
    Date of Patent: April 10, 1979
    Assignee: Varta Batterie Aktiengesellschaft
    Inventors: August Winsel, Ernst Voss, Welf Dennstedt, Waldemar Borger
  • Galvanic element with negative light metal or zinc electrode
    Patent number: 4139683
    Abstract: The positive electrode consisting of the chalcogenide of an at least bi-valent metal is connected to the positive current take-off solely through an electrically conductive connector having an exceptionally small contact area with the higher valent metal.
    Type: Grant
    Filed: December 28, 1977
    Date of Patent: February 13, 1979
    Assignee: Varta Batterie Aktiengesellschaft
    Inventors: Hans Sauer, Hans-Martin Lippold, Dieter Spahrbier
  • Dust reduction for electrode plates
    Patent number: 4135041
    Abstract: Lead dust evolution from battery plates is reduced by applying a coating containing a silicate. Also plates so produced.
    Type: Grant
    Filed: March 13, 1978
    Date of Patent: January 16, 1979
    Assignee: Varta Batterie Aktiengesellschaft
    Inventors: Margarete Jung, Ernst Voss, Tsvetko Chobanov
  • Galvanic element, particularly alkaline storage battery
    Patent number: 4128705
    Abstract: In a galvanic element which has a tendency to leak electrolyte at the lid seal, there is formed, on the metal enclosure portion which bears against the seal, a passive oxide surface layer which is not reducible at the negative electrode potential.
    Type: Grant
    Filed: July 29, 1977
    Date of Patent: December 5, 1978
    Assignee: Varta Batterie Aktiengesellschaft
    Inventor: August Winsel
  • Vibratory chemical reactor having insulation which acquires an electrostatic charge during vibration
    Patent number: 4125378
    Abstract: The mantle of a vibratory spiral reactor is filled with powdery material for insulation which acquires an electrostatic charge during vibration, thereby providing air spaces and resisting compaction during operation of the reactor.
    Type: Grant
    Filed: September 29, 1977
    Date of Patent: November 14, 1978
    Assignee: Varta Batterie Aktiengesellschaft
    Inventor: Hans von Dohren
  • Seal construction for primary cells
    Patent number: 4124738
    Abstract: The cell cup of a primary element has a turned-over (crimped) rim engaging the underside of a synthetic plastic sealing member. The cell rim is turned over to between 140.degree. and 190.degree. and is engaged by the underside of the sealing member to the extent of 50 to 100.degree.. The end of the crimped rim abuts against a protrusion from the sealing member.
    Type: Grant
    Filed: April 4, 1977
    Date of Patent: November 7, 1978
    Assignee: Varta Batterie Aktiengesellschaft
    Inventor: Werner Riedl
  • Electric storage battery
    Patent number: 4122244
    Abstract: A synthetic plastic insert is attached to the top of the plate block and bears against the cell lid.
    Type: Grant
    Filed: August 17, 1977
    Date of Patent: October 24, 1978
    Assignee: Varta Batterie Aktiengesellschaft
    Inventors: Gerhard Kammerer, Friedrich Bohne
  • Electric storage battery, particularly for vehicles
    Patent number: 4117211
    Abstract: Battery with terminal posts having low resistance, high-strength tubular loop inserts. A lead receptacle encircled by a synthetic plastic molding surrounds the post. A weldment bead is between the post and the lead receptacle. Preferably the top of the post is rectangular and the connector cable crimped into the insert protrudes at about 45.degree. from the battery.
    Type: Grant
    Filed: April 11, 1977
    Date of Patent: September 26, 1978
    Assignee: Varta Batterie Aktiengesellschaft
    Inventors: Heinz Schuster, Rolf Prange
  • Lead dosing valve
    Patent number: 4114649
    Abstract: A valve body has outlet ducts to be positioned below the surface of the molten lead, and a head rotatable with respect to the body. The head has recesses which terminate in slots that can be aligned with the outlet ducts to open the valve. These slots have smaller cross-sections than the ducts. The body also has open ended passages which align with the outlet ducts when the valve is closed.
    Type: Grant
    Filed: June 25, 1976
    Date of Patent: September 19, 1978
    Assignee: Varta Batterie Aktiengesellschaft
    Inventors: Hans-Georg Lindenberg, Joachim Illmann, Hans-Joachim Golz
  • Air/zinc flat cell
    Patent number: 4115626
    Abstract: Perforted plastic half shells enclose series of components, each including a conductive foil, a take-off conductor, the positive pressed carbon electrode, and separator. Between these components there is the negative zinc plate electrode, which is framed in plastic. The half shells have electrolyte access passages and connector lead-throughs.
    Type: Grant
    Filed: March 23, 1977
    Date of Patent: September 19, 1978
    Assignee: Varta Batterie Aktiengesellschaft
    Inventors: Hans Sauer, Dieter Spahrbier