Patent ID: 11927663
Assignee: BAYERISCHE MOTOREN WERKE AKTIENGESELLSCHAFT
Field: Measurement (Instruments)
Classification: CPC G  Y | IPC G

Claim 0:
1. A calibration method for an electrochemical impedance measuring device that is provided for measuring an impedance of an electrochemical cell, the method comprising:
(a) connecting the impedance measuring device to an impedance normal that has at least two excitation connections for feeding in an excitation signal and two measurement connections for determining a measurement signal, and that has a fixed or variable impedance that corresponds to an impedance setpoint value ZSoll;
(b) applying a voltage signal UEin to the excitation connections and measuring the current IAus flowing through the impedance normal on account of the voltage signal UEin at the measurement connections; or supplying a current signal IEin to the excitation connections and measuring the voltage drop UAus at the measurement connections; and
(c) calibrating the impedance measuring device against the impedance normal to the impedance ZSoll using Z=UEin/IAus=ZSoll or Z=UAus/IEin=ZSoll,
wherein a geometric arrangement of the excitation connections and the measurement connections of the impedance normal corresponds to a geometric arrangement of connections of the electrochemical cell for which the impedance is to be measured, as a result of which the impedance normal can be contact-connected to the impedance measuring device in a same arrangement as the electrochemical cell.