Patent ID: 11892517
Assignee: DEKRA SE
Field: Measurement (Instruments)
Classification: CPC B  G  Y | IPC B  G

Claim 7:
8. The method according to claim 1, wherein establishing the ohmic internal resistance of the traction battery furthermore comprises at least one of the following steps:
for at least one value of a value pair, a respective valid measurement range is defined, wherein a value pair is not taken into account if one or both values are outside the respective measurement range, wherein the measurement range is defined on the basis of an absolute value or a rate of change of the associated value;
a measurement sequence of output voltage and load current value pairs is acquired, wherein the test load is connected throughout the duration of the measurement sequence, wherein the measurement sequence comprises a plurality of output voltage and load current value pairs acquired at succeeding points in time, wherein a value pair is not taken into account if one or both values of this pair are equal to the corresponding value of at least one value pair acquired at a previous point in time;
a measurement sequence of output voltage and load current value pairs is acquired, wherein the test load is connected throughout the duration of the measurement sequence, wherein the measurement sequence comprises a plurality of output voltage and load current value pairs acquired at succeeding points in time, wherein the measurement sequence is subjected to low-pass filtering; or
a measurement sequence of output voltage and load current value pairs is acquired, wherein the test load is connected throughout the duration of the measurement sequence, wherein the measurement sequence comprises a plurality of output voltage and load current value pairs acquired at succeeding points in time, wherein;
a moving average value of the ohmic internal resistance is established from the output voltage and load current value pairs of the measurement sequence, wherein the respective ohmic internal resistance for two respective value pairs acquired in immediate succession is established from the difference of the two output voltages divided by the difference of the two load currents and the moving average of the ohmic internal resistance is formed by the average of the respective ohmic resistances established in this manner, or
the ohmic internal resistance is established from the respective output voltage and load current value pairs on the basis of a mathematical adjustment calculus, according to the least square fit method.