My work is based on the details mentioned in this paper: Kim et al. (2008)
Article Effect of electrode configuration on the thermal behavior of...
The MSMD model solves two transport equations for the positive and negative potentials. In order to solve the equations, you need the current density J, which is estimated by using:
J = Y(Vp-Vn-U)
Vp and Vn are the potentials, but Y and U are fitting parameters that need to be determined experimentally. Y and U can be estimated by polynomials and need 7 or 8 coefficients.
Now my problem is, I do not fully understand how can I obtain these coefficients. Are experiments necessary? Or can I just use the battery characteristics curve?
J is not current, therefore I don't think it can be measured. U apparently has the units of voltage, but what does it mean?
Both U and Y are functions of the depth of discharge (DOD), is this the same as the discharge capacity? If not, then how am I going to obtain these coefficients?
Thank you
ANSYS Fluent does not have a specific method for determining fitting parameters for the MSMD battery model. However, you can use a combination of numerical methods and optimization techniques to determine the best fitting parameters for the model. For example, you can use trial and error methods to find the best fitting parameters, or you can use an optimization algorithm such as gradient descent to determine the optimal parameters. Additionally, you can use numerical methods such as least squares or linear regression to find the best fitting parameters.
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