Patent ID: 11970077
Assignee: DAIMLER AG
Field: Measurement (Instruments)
Classification: CPC B  G  Y | IPC B  G

Claim 0:
1. A method for determining a cell voltage of a battery cell of a traction battery of a vehicle, comprising the steps of:
detecting the cell voltage of the battery cell by a first sensor;
filtering the detected cell voltage of the battery cell by a filtering device;
sampling the filtered cell voltage by an analogue to digital converter;
transferring the filtered and sampled cell voltage as a cell voltage signal to a computing device;
evaluating the cell voltage signal by the computing device;
determining a total voltage of the traction battery by a second sensor; and
evaluating the cell voltage signal depending on the ripple value;
wherein a voltage ripple of the total voltage is determined and wherein the voltage ripple of the total voltage is scaled for the battery cell by dividing the voltage ripple of the total voltage by a number of battery cells switched in series to obtain a result and then adding the result to a detected maximum cell voltage of the battery cell.