LiB Battery (Table-Based) Dynamics impedance error

Hallo!

I have been trying to use diffrent allready made blocks to model a LiB but get the reverse effect or nothing when i either make my own RC net.

I sweep from 1mHz to 100Hz in 1000 sec.

Any help is much appriciated!

the model i have tried but failed below

The result of the impedance from own made ladder

what it is supposed to look like with the same parameters (Green)

Thatnks in advance!

[Alfred Kulldorff]

I tried with an earlier version (2018) and get same result. The voltage increaseswhen it shuld decrease over the impedance

Answer 1

[Joel Van Sickel]

Hello Alfred,

it looks like the plot you are showing from simulink, is a standard scope plot, which means that it is a time based plot and not a frequency response. To get the frequency response (such as a bode plot) you will need the simulink control design toolbox. With that, you can set up your inputs and outputs to measure frequency response (including impedance).

Here is a brief tutorial on that: http://electronicsbeliever.com/how-to-setup-bode-plot-in-simulink/

Alternatively, you will need to do manually implement a FFT on the sweep that you applied.

Regards,

Joel