Varta Microbattery Gmbh

Volkswagen Varta Microbattery Forschungsgesellschaft Mbh & Co. Kg

Rainer Hald

Winfried Gaugler

Markus Kohlberger

Thomas Woehrle

Bernd Kreidler

Goran Kilibarda

Claus-Christian Fischer

Peter Birke

Konrad Holl

Rolf Brenner

Dejan Ilic

Werner Schreiber

Edward Pytlik

Arno Perner

Jürgen Ernsperger

Peter Haug

Juergen Ernsperger

Willi Wallkum

Calin Wurm

Markus Pompetzki

Robert Hieber

Thomas Wöhrle

Johannes Maier

An energy storage cell includes a cylindrical housing that encloses an interior space and a housing casing, a wound composite body arranged in the interior space and having a helical structure including at least two electrode strips and at least one separator strip arranged between the electrode strips, each including a strip-shaped current collector having an active material coating, the wound composite body includes two terminal end faces, a circumferential outer composite body lateral surface and a circumferential inner composite body lateral surface, the inner composite body lateral surface defines an axially oriented cavity, a winding core having a substantially cylindrical or hollow cylindrical shape and has an outer circumferential surface that rests flat on the inner composite body lateral surface, and the winding core has a local deviation from the cylindrical or hollow cylindrical shape in at least one region of the outer circumferential surface.

Electrochemical energy storage cell

An electrochemical cell includes an annular electrode composite body; and an annular liquid-tight housing formed as a hollow cylinder and including an annular interior space, wherein the housing is arranged around a central aperture or recess, the housing has a height of 5 mm to 40 mm and an external diameter of 6 mm to 20 mm, and the annular electrode composite body is arranged in the annular interior space.

Electrochemical cell and apparatus containing the cell

An electrochemical cell includes a composite electrode body with at least one positive and at least one negative electrode; an electrolyte that impregnates the composite electrode body; and a housing with a liquid-impervious interior, wherein the composite electrode body impregnated with the electrolyte is disposed in the interior, and the housing consists of PEK or a PEK based material.

Electrochemical cell

An emergency system for power failures includes a single-cell or multiple-cell rechargeable battery selected from the group consisting of NiMH, NiCd, NiZn, AgO/Zn or lithium-ion, and a charging electronics system that charges the battery, wherein the charging electronics system provides a charging voltage at which the battery does not overcharge at a temperature of up to 80&#xb0; C., and wherein the charging electronics system supplies a charging voltage at which the battery is transferred into a charging state and/or is kept in a charging state, in which the battery is charged to 5% to 30%.

Emergency system for power failures

An emergency system for a motor vehicle having an onboard power supply system which triggers in an emergency a radio emergency call regardless of the state of the on-board power supply system of the motor vehicle, including a radio communication device that triggers the emergency call, a back-up battery including one or more electrochemical cells that supply the radio communication device with electric energy, and an electric heating device supplied with power by the on-board power supply system with which the back-up battery can be heated when its temperature is below or drops below a lower limit value, wherein the electric heating device is a heating foil including heating resistors laminated between electrically insulating foils and having a thickness &#x3c;2 mm, and the heating foil is arranged in a substantially planar, two-dimensional contact to the electrochemical cell(s) of the battery.

System and method for heating back-up battery of motor vehicle emergency radio communication device when temperature is below a limit value

A method for fault tracing in automatically operating electronic measurement and test arrangements for a large number of electrochemical elements, wherein holders for the electrochemical elements are provided on the measurement and test arrangements and wherein cell simulators are provided with an external shape and size, including electrical connections, which approximately simulate one of the electrochemical elements to be tested, and contain test electronics, with a behaviour of the cell simulators with inverse polarity differing to a major extent from a behaviour with polarity based on the application, including the steps of inserting of the cell simulators into the holders, activating one of the cell simulators and applying a measurement current applied to it, measuring the voltage on the cell simulator and comparing the voltage with the nominal voltage predetermined for the cell simulator.

Method for fault tracing in electronic measurement and test arrangements for electrochemical elements

Growing community of inventors

Ellwangen, Germany

Rainer Hald