Shifting from SPM model to ElectrodeSOH model while using sim_func

[cyasing]

I declared a sim_func to enable using PyBaMM's SPM model, but it ended up shifting to ElectrodeSOH model anyway. The function declares the parameters, model and solver configuration just as I used when doing a single cell, and I return the simulation object and parameters.

Note that this same thing happened even with the format given in tutorial 8 of the liionpack website. More annoyingly, I get a capacity related error that was not an issue with the SPM or DFN with the same inputs in PyBaMM.

The error messages:

The output fuction and sim_func call:

    simf, param = pybamm_sim(drive_cycle) # sim_func

    # Solve pack
    output = lp.solve(
        netlist=netlist,
        parameter_values=param,
        experiment=experiment,
        sim_func=simf,
        output_variables=output_variables,
        initial_soc=1,
    )

[cyasing]

The actual error:

Traceback (most recent call last):
File "/mnt/c/Users/Knight/Documents/PyBaMM/lptp/lib/python3.9/site-packages/pybamm/models/full_battery_models/lithium_ion/electrode_soh.py", line 237, in solve
sol = self._solve_full(inputs, ics)
File "/mnt/c/Users/Knight/Documents/PyBaMM/lptp/lib/python3.9/site-packages/pybamm/models/full_battery_models/lithium_ion/electrode_soh.py", line 303, in _solve_full
sol = sim.solve([0], inputs=inputs)
File "/mnt/c/Users/Knight/Documents/PyBaMM/lptp/lib/python3.9/site-packages/pybamm/simulation.py", line 608, in solve
self._solution = solver.solve(self.built_model, t_eval, **kwargs)
File "/mnt/c/Users/Knight/Documents/PyBaMM/lptp/lib/python3.9/site-packages/pybamm/solvers/base_solver.py", line 875, in solve
new_solution = self._integrate(
File "/mnt/c/Users/Knight/Documents/PyBaMM/lptp/lib/python3.9/site-packages/pybamm/solvers/algebraic_solver.py", line 224, in _integrate
raise pybamm.SolverError(
pybamm.expression_tree.exceptions.SolverError: Could not find acceptable solution: solver terminated successfully, but maximum solution error (0.2535227622370124) above tolerance (1e-06)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/mnt/f/Programming/Computation/Battery/CEC/liionpack/examples/try2.py", line 140, in
output = lp.solve(
File "/mnt/f/Programming/Computation/Battery/CEC/liionpack-power-trial/liionpack/solver_utils.py", line 428, in solve
output = rm.solve(
File "/mnt/f/Programming/Computation/Battery/CEC/liionpack-power-trial/liionpack/solvers.py", line 371, in solve
self.setup_actors(nproc, self.inputs_dict, initial_soc)
File "/mnt/f/Programming/Computation/Battery/CEC/liionpack-power-trial/liionpack/solvers.py", line 669, in setup_actors
a.setup(
File "/mnt/f/Programming/Computation/Battery/CEC/liionpack-power-trial/liionpack/solvers.py", line 47, in setup
_, _ = lp.update_init_conc(parameter_values, initial_soc, update=True)
File "/mnt/f/Programming/Computation/Battery/CEC/liionpack-power-trial/liionpack/sim_utils.py", line 53, in update_init_conc
x, y = lp.get_initial_stoichiometries(SoC, param)
File "/mnt/f/Programming/Computation/Battery/CEC/liionpack-power-trial/liionpack/sim_utils.py", line 31, in get_initial_stoichiometries
return esoh_solver.get_initial_stoichiometries(initial_soc)
File "/mnt/c/Users/Knight/Documents/PyBaMM/lptp/lib/python3.9/site-packages/pybamm/models/full_battery_models/lithium_ion/electrode_soh.py", line 442, in get_initial_stoichiometries
x_0, x_100, y_100, y_0 = self.get_min_max_stoichiometries()
File "/mnt/c/Users/Knight/Documents/PyBaMM/lptp/lib/python3.9/site-packages/pybamm/models/full_battery_models/lithium_ion/electrode_soh.py", line 510, in get_min_max_stoichiometries
sol = self.solve(inputs)
File "/mnt/c/Users/Knight/Documents/PyBaMM/lptp/lib/python3.9/site-packages/pybamm/models/full_battery_models/lithium_ion/electrode_soh.py", line 246, in solve
raise split_error
File "/mnt/c/Users/Knight/Documents/PyBaMM/lptp/lib/python3.9/site-packages/pybamm/models/full_battery_models/lithium_ion/electrode_soh.py", line 241, in solve
sol = self._solve_split(inputs, ics)
File "/mnt/c/Users/Knight/Documents/PyBaMM/lptp/lib/python3.9/site-packages/pybamm/models/full_battery_models/lithium_ion/electrode_soh.py", line 316, in _solve_split
x0_sol = x0_sim.solve([0], inputs=inputs)
File "/mnt/c/Users/Knight/Documents/PyBaMM/lptp/lib/python3.9/site-packages/pybamm/simulation.py", line 608, in solve
self._solution = solver.solve(self.built_model, t_eval, **kwargs)
File "/mnt/c/Users/Knight/Documents/PyBaMM/lptp/lib/python3.9/site-packages/pybamm/solvers/base_solver.py", line 875, in solve
new_solution = self._integrate(
File "/mnt/c/Users/Knight/Documents/PyBaMM/lptp/lib/python3.9/site-packages/pybamm/solvers/algebraic_solver.py", line 224, in _integrate
raise pybamm.SolverError(
pybamm.expression_tree.exceptions.SolverError: Could not find acceptable solution: solver terminated successfully, but maximum solution error (0.2534958140144239) above tolerance (1e-06)

[cyasing]

Yeah, you may be right. Here you go, both the script and the data:
pack.zip

[cyasing]

ElectrodeSOH model is used in simulation class for calculating SOC so is pretty standard. Post the full script you are running and I'll take a look. Might be an issue with your parameters

Did you find anything of note?

[TomTranter]

Not had chance to look. Very busy right now.

[cyasing]

Understandable

[cyasing]

Just a reminder to check this if you can give time to it.

Not had chance to look. Very busy right now.