Help, some questions about calendar aging

[jxnu-liguobin]

Thanks for this very nice repository. I have some questions for pybamm.

At present, in the example, calendar aging is stored directly, but in the literature and practical application of calendar aging, batteries often need to test their capacity at regular intervals, which seems to be called "capacity characterization testing"? I don't know very well, but I'm sure it's for getting capacity.

I'm not sure if pybamm can implement such a calendar aging experiment? There are 2 problems I am facing here.

The first one is if I write a cycle test experiment, can I use a long rest as a part of calendar aging?

The second question is, is it possible to change the temperature when the temperature of calendar and cycle is different?

[valentinsulzer]

• Yes, long rest is exactly how we simulate calendar aging
• You can specify the temperature for individual steps by setting the temperature argument of a step e.g. pybamm.step.current(..., temperature="25oC")

If you need more control, you can also do something like

sim1 = pybamm.Simulation(...)
sol1 = sim1.solve()
sim2 = pybamm.Simulation(...)
sol2 = sim2.solve(starting_solution=sol1)

sol2 will initialize using the final state of sol1

[jxnu-liguobin]

Thank you for your reply. I will try tomorrow.