Hello, I'm using COMSOL to model batteries (not the battery module) and I need to define the applied current as: charge (CCCV) + rest + discharge (CCCV) + rest
I'm wondering if it is possible to limit the CV part by the current (or SOC) which is declining and the rest part by time? i.e. charge (CCCV) until current reaches 0.05 of the CC, then rest for a certain period and the same thing for discharge.
To start, I used "Events" and an analytical function to switch between charge and discharge and it is working but since the rest duration is constant and does not depend on current (or SOC), we need the applied current to be a function of SOC and time. I'm wondering if it is possible to do so in COMSOL?
Thanks.
Divide your study in 3 steps, for CC apply constant flux, for rest remove the flux and let it solve and for CV apply constant concentration. Stop CC by achieving some sort of max concentration. Stop the CV by calculating the minimum current flow/ flux with integartion operator.
Use the end results as initial conditions for the next step.
I have done above steps to solve for cccv for single particle models...
Noman Iqbal Thanks for your answer,
My model goes from CC to CV when it reaches cut-off voltage so I think I don't need any max concentration for that. Also, I can stop CV at a threshold (0.05*CC) and make it go to rest. The problem is that I need this rest to be a certain time (like 10 min) and then make it go to discharge, so I guess removing the flux does not solve this problem.
How do you "use end results as the initial conditions of the next step"? Do you mean manually doing that? I need this to run for multiple cycles.
Please let me know if I'm missing anything.
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