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Bundesrepublik Deutschland, Vertreten Durch Das Bundesministerium Für Wirtschaft Und Technologie, Dieses Vertreten Durch Den Präsidenten Der Physikalisch-technischen Bundesanstalt

Clemens Elster

Gerd Wuebbeler

Rainer Fuessler

Steffen Seitz

Rainer Füssler

Martin Wuensch

Ingolf Weingaertner

Michael Schulz

Martin Wünsch

Gerd Wübbeler

A method for determining an ageing parameter Kof a rechargeable battery, especially a lithium rechargeable battery, featuring the steps (a) detecting an impedance Z of the rechargeable battery at different frequencies f, so that a Nyquist plot and a real part path, which plots a real part of the impedance Z against the frequency f, are obtained, determining at least one of the following SOH parameters, which can be selected from a predetermined list, establishing an SOH row vector {right arrow over (P)} from the SOH parameters and all mixed terms of the form p&#xb7;p, m=1, . . . , 11, n=1, . . . , m. The invention provides for the multiplication of the SOH row vector {right arrow over (P)} by a saved calibration vector {right arrow over (A)}, thereby obtaining the ageing parameter K.

Method for determining an ageing parameter, a state of charge parameter and a temperature of a rechargeable battery, especially a lithium rechargeable battery

The invention relates to a measuring arrangement comprising a sensor head () that can be displaced over a surface () at a distance therefrom in a scanning direction (R), a plurality of distance sensors which are suitable for distance measurement and are interspaced in the scanning direction in a fixed manner, a displacement device for displacing the sensor head () in such a way that points of the surface () are detected in successive scanning steps carried out by a plurality of distance sensors, and an evaluation device to which the output signals of the distance sensors are supplied. According to the invention, one such measuring arrangement is improved by an angle measuring device () for determining an angle value of the sensor head () in relation to the scanning direction (R), and for forwarding said angle value to the evaluation device. In this way, systematic measuring errors can be eliminated for the reconstruction of a topography of the surface () in the scanning direction (R). Furthermore, the sensor head () can be calibrated by means of the measuring arrangement.

System and method for correcting systematic error of, and calibrating for, tilt angle of surface topology sensor head having plurality of distance sensors

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Berlin, Germany

Clemens Elster