Cycling aging

[epsilon-smaller-zero]

Hello everyone,

I am quite new to PyBaMM and i have a question regarding cycling aging. I wanted to perform a cycling aging with the following experiment:

1. Loop:

• Charge until 4.2V with 0.2C
• Rest for 30 minutes
• Discharge until 60% (3.72V) with 0.2C
• Rest for 30 min
• Discharge for 30 seconds with 0.2C
• Rest for 30 min
• Discharge until 3V with 0.2C

2. Loop:

• Charge until 4.2V with 1C
• Discharge until 3 V with 1C

The cycling should look like (Loop 1, Loop2 *24)*20.

I used this example as a basis and I have just tried to change the experiment parameters.
The problem is the second loop. It is marked yellow with the error message:
"Expected type "list[tuple[str,str,str,str,str,str,str,str]]" (matched generic type "list[_T]"), got "list[tuple[str,str,str]]" instead."
What is the problem here and how can I solve it?
Secondly, how can I write the code, that the 2. loop is taken 24 times and the whole procedure 20 times?

My code:

pb.set_logging_level("NOTICE")
model = pb.lithium_ion.DFN(
    {
        "SEI": "ec reaction limited",
        "SEI film resistance": "distributed",
        "SEI porosity change": "true",
        "lithium plating porosity change": "true",
    }
)

param = pb.ParameterValues("Chen2020")

experiment = pb.Experiment(
    [
        (
            "Charge at 0.2 C until 4.2 V",
            "Rest for 30 minutes",
            "Discharge at 0.2 C until 3.72 V",
            "Rest for 30 minutes",
            "Discharge at 0.2 C for 30 seconds",
            "Rest for 30 minutes",
            "Discharge at 0.2 C at 3V",
        )
    ]
    + [
        (
            "Charge at 1C until 4.2 V",
            "Discharge at 1C until 3 V",
        )
    ]*24
)

sim = pb.Simulation(model, experiment=experiment, parameter_values=param)
sim.solve(solver=pb.CasadiSolver(mode="fast with events"))

Thank you for your help in advance!

[brosaplanella]

I got a different error, caused by a typo: it should say "Discharge at 0.2 C until 3V" instead of "Discharge at 0.2 C at 3V". Fixing that got the code running at my end.

[epsilon-smaller-zero]

Thank you for your help. It works now :)