Event: Minimum voltage' was triggered

[redchang111]

I want to use the parameter set of "Chen2020" to simulate Yang's experiment process to see the aging trajectory of the battery. But the error is that I triggered the minimum voltage which interrupted the experiment. Here is my code:

import pybamm
import numpy as np

aging_option={"SEI":"ec reaction limited"}
model = pybamm.lithium_ion.DFN(options=aging_option)
params_value= pybamm.ParameterValues("Chen2020")
#params_value["Lower voltage cut-off [V]"] = 2.7
geometry = model.default_geometry
params_value.process_model(model)
params_value.process_geometry(geometry)

experiment=pybamm.Experiment(
[
("Discharge at 0.1C until 2.8V",
"Charge at 1C until 4.2V",
"Hold at 4.2V until C/10",
"Rest for 5 minutes",)] * 5,
)#Yang's process
var_pts={'x_n': 20,
'x_s': 20,
'x_p': 20,
'r_n': 20,
'r_p': 20,
'r_n_prim': 20,
'r_p_prim': 20,
'r_n_sec': 20,
'r_p_sec': 20,
'y': 20,
'z': 20,
'R_n': 30,
'R_p': 30}
mesh=pybamm.Mesh(geometry,model.default_submesh_types,var_pts)
#t_eval =np.linspace(0,3600,100)

safe_solver = pybamm.CasadiSolver(atol=1e-3, rtol=1e-3, mode="safe")

sim=pybamm.Simulation(model,experiment=experiment,parameter_values=params_value,var_pts=var_pts,solver=safe_solver)
sim.solve()
sim.plot()
2023-03-20 22:03:16.215 - [WARNING] callbacks.on_experiment_infeasible(233):

Experiment is infeasible: 'event: Minimum voltage' was triggered during 'Charge at 1C until 4.2V'. The returned solution only contains up to step 2 of cycle 1.