How to estimate the Polarization Resistance and Polarization Capacitance with the lest square method?

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Kavishanth Srikumar 2022-12-17

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回答： Dallas Perkins 2022-12-21

Hi,

i want to estimate the Polarization Resistance (Rth) and Polarization Capacitance (Cth) with the least square method in MATLAB or Simulink. I want to use these formulas:

Rth = a/I (a is △th)

Cth = 1/(Rth • b)

Can u help me to create an Algorithm in MATLAB or Simulink?

Thanks for the help

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Answer 1

Dallas Perkins 2022-12-21

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Hi Kavishanth,

You can use Simulink Design Optimization and the Parameter Estimator tool to estimate the equivalent circuit battery parameters based on measured data. This tool can also produce equivalent MATLAB code if you want to automate the process. We have a couple of examples at the links below that can help you get started:

https://www.mathworks.com/help/sps/ug/battery-parameter-extraction-from-data.html

https://www.mathworks.com/matlabcentral/fileexchange/36019-battery-modeling?s_tid=prof_contriblnk

Best,

Dallas