Defining Diffusion Coefficient as a function of SOC

brosaplanella · 13 November 2024 14:34

This topic has been transferred from Github discussions.

I have a relation between diffusion coefficient of electrodes wrt SOC. Can we provide it as an input in pybamm model?

brosaplanella · 13 November 2024 14:34

Yes, diffusivity can be a function of stoichiometry and temperature. You need to define a function as part of your parameter set, e.g. like this:

github.com

pybamm-team/PyBaMM/blob/develop/src/pybamm/input/parameters/lithium_ion/Ecker2015.py#L5


      
          import pybamm
          import numpy as np
          
          
          def graphite_diffusivity_Ecker2015(sto, T):
              """
              Graphite diffusivity as a function of stoichiometry [1, 2, 3].
          
              References
              ----------
               .. [1] Ecker, Madeleine, et al. "Parameterization of a physico-chemical model of
              a lithium-ion battery i. determination of parameters." Journal of the
              Electrochemical Society 162.9 (2015): A1836-A1848.
              .. [2] Ecker, Madeleine, et al. "Parameterization of a physico-chemical model of
              a lithium-ion battery ii. model validation." Journal of The Electrochemical

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Defining Diffusion Coefficient as a function of SOC

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