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Frequency-Domain, Perturbation
Posted Jun 11, 2013, 8:42 a.m. EDT Low-Frequency Electromagnetics, Battery Design, Studies & Solvers Version 4.3b 1 Reply
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Dear all,
I'm simulating impedance spectra on a newman type lithium ion battery model. I use one single solver Step: Frequency-Domain, Perturbation. There is one single "Electrode Current Densitiy" -node in my model, with the harmonic perturbation option checked.
Everything works fine, the results are the same as with (unbiased) 'manual' time domain calculation.
I'm not sure though, what this Frequency-Domain, Perturbation solver actually does. Results aren't sensitive at all to changes in "Inward electrode current densitiy", the only parameter I can modify here. Only if put in a 0, results are NaN.
Is there a bias? What is the current value in "Inward electrode current densitiy"? If it would be the current bias, a 10C rate should influence the impedance spectrum, but it doesn't.
Thanks for your help.
I'm simulating impedance spectra on a newman type lithium ion battery model. I use one single solver Step: Frequency-Domain, Perturbation. There is one single "Electrode Current Densitiy" -node in my model, with the harmonic perturbation option checked.
Everything works fine, the results are the same as with (unbiased) 'manual' time domain calculation.
I'm not sure though, what this Frequency-Domain, Perturbation solver actually does. Results aren't sensitive at all to changes in "Inward electrode current densitiy", the only parameter I can modify here. Only if put in a 0, results are NaN.
Is there a bias? What is the current value in "Inward electrode current densitiy"? If it would be the current bias, a 10C rate should influence the impedance spectrum, but it doesn't.
Thanks for your help.
1 Reply Last Post Jun 14, 2013, 10:15 a.m. EDT
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Posted:
1 decade ago
does nobody have an idea? Also, it would be interesting to know how the linearized perturbation terms look like. I expect them to be a steady state variable_1 + Real(variable_2 * exp(j*w*t)). But I cannot find anything about it in the doc.