https://docs.pybamm.org/en/latest/source/examples/notebooks/models/coupled-degradation.html
@DrSOKane This is the full experimental data for Lg 18650 Mh1 cell.
here is one more picture of same plot from 1 to 500 cycles
Can you give me some useful tips by looking this plot for simulation?
Hi DrSOKane,
You mentioned that " The experimental plot is consistent with the "solvent-diffusion limited" SEI model" above. So would you give more details on how to determine the type of SEI model for both cycling ageing and calender ageing?
I recommend the "interstitial-diffusion limited" model, for reasons explained in this paper. It shows the same square root of time dependence as the solvent-limited model, but also accounts for the battery’s state of charge.
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@DrSOKane hello, whate is the reason that you asked him to devide
param.update({ "Nominal cell capacity [A.h]": 3.2, "Electrode width [m]": 1.58 * 3.2 /5, })
and is there a way to determine the coefficient that devide by for exemple if i’m simulating a discharge of a battery with 100 A.h at C/5 how should it determine my electrode width ?
Hi Salah, the capacity of the OKane2022 cell is 5 Ah. If you want to use the same parameters but for a 100 Ah cell, you need to multiply the electrode width by 20.
Hello @DrSOKane thank you for the replay, actually i’m not using the same parameters i changed "Negative current collector thickness [m]": , "Positive current collector thickness [m]": , "Separator thickness [m]": , "Ambient temperature [K]":, "Cell volume [m3]": , "Negative electrode thickness [m]":, "Positive electrode thickness [m]":, "Electrode height [m]":, "Electrode width [m]":, "Positive electrode active material volume fraction":, "Positive electrode exchange-current density [A.m-2]":, "Negative electrode active material volume fraction":, "Negative electrode exchange-current density [A.m-2]":, "Negative current collector conductivity [S.m-1]": , "Positive current collector conductivity [S.m-1]": , "Negative current collector specific heat capacity [J.kg-1.K-1]":, "Positive current collector specific heat capacity [J.kg-1.K-1]": , "Negative current collector thermal conductivity [W.m-1.K-1]":, "Positive current collector thermal conductivity [W.m-1.K-1]": , "Separator porosity": , "Separator density [kg.m-3]": , "Lower voltage cut-off [V]": , "Upper voltage cut-off [V]": , "Open-circuit voltage at 100% SOC [V]": , "Open-circuit voltage at 0% SOC [V]": , "Nominal cell capacity [A.h]": , #"Current function [A]": , "Initial concentration in negative electrode [mol.m-3]":, "Initial concentration in positive electrode [mol.m-3]":, "Open-circuit voltage at 0% SOC [V]": ,
and i working on a NMC532 and i’m trying to compare the sim with experimental values i tryied to adjest the electrod width as i’m working with 120Ah but the same parameters does’nt give me the same results for discharging at 0.5C and 1C or C/3 for exemple. and for charging it gives completly innaccurat results, i don’t where should i look