Hey there,
I was following the basic eVTOL tutorial and came across this error:
\Anaconda3\lib\site-packages\suave-2.5.2-py3.9.egg\SUAVE\Methods\Power\Battery\Cell_Cycle_Models\LiNiMnCoO2_cell_cycle_model.py", line 51, in compute_NMC_cell_state_variables
V_ul = np.atleast_2d(battery_data.Voltage(pts)[:,1]).T
AttributeError: 'NoneType' object has no attribute 'Voltage'
I traced it back to the function Lithium_Ion_LiNiMnCoO2_18650.py where "battery" is correctly presented (I think, I will leave a print of this variable in the P.S) and found out that the "battery_data" is indeed "None".
This might be an error on my side but I can´t seem to figure it out. Can someone provide any guidance?
Best regards,
Diogo Tomas
P.S:
tag : Lithium_Ion_LiNiMnCoO2_Cell
origin : [[0. 0. 0.]]
generative_design_max_per_vehicle : 0
generative_design_characteristics : []
generative_design_special_parent : None
mass_properties :
mass : 453.59237
volume : 0.0
center_of_gravity : [[0. 0. 0.]]
moments_of_inertia :
center : [0. 0. 0.]
tensor : [[0. 0. 0.]
[0. 0. 0.]
[0. 0. 0.]]
symmetric : False
inputs :
outputs :
chemistry : None
energy_density : 0.0
current_energy : [[2.90866107e+08]
[2.90866107e+08]
[2.90866107e+08]
[2.90866107e+08]
[2.90866107e+08]
[2.90866107e+08]
[2.90866107e+08]
[2.90866107e+08]]
initial_temperature : 20.0
current_capacitor_charge : 0.0
resistance : 0.025
specific_heat_capacity : 1108
max_energy : 306174849.75000006
max_power : 86246436.54929578
max_voltage : 400
discharge_performance_map : None
ragone :
const_1 : 88818.0
const_2 : -4.258333333333333e-06
lower_bound : 216000.0
i : 0.0
upper_bound : 810000.0
cell :
mass : 0.048
charging_SOC_cutoff : 1.0
charging_current : 3.0
charging_voltage : 3.6
diameter : 0.0185
height : 0.0653
surface_area : 0.004332806048014702
volume : 1.7552804648907316e-05
density : 2734.6057202880147
electrode_area : 0.0342
max_voltage : 4.2
nominal_capacity : 3.55
nominal_voltage : 3.6
specific_heat_capacity : 1108
radial_thermal_conductivity : 0.4
axial_thermal_conductivity : 32.2
module :
pack_config :
series : 95
parallel : 70
total : 6654
module_config :
total : 1
normal_count : 1
parallel_count : 1
normal_spacing : 0.02
parallel_spacing : 0.02
age : 0
convective_heat_transfer_coefficient : 35.0
heat_transfer_efficiency : 1.0
cooling_fluid :
tag : air
molecular_mass : 28.96442
gas_specific_constant : 287.0528742
composition :
gas : 1.0
O2 : 0.20946
Ar : 0.00934
CO2 : 0.00036
N2 : 0.78084
other : 0.0
specific_heat_capacity : 1006
cooling_flowspeed : 0.01
thermal_conductivity : [[0.0254375 ]
[0.02543675]
[0.02543466]
[0.02543164]
[0.02542829]
[0.02542527]
[0.02542318]
[0.02542243]]
kinematic_viscosity : [[1.46071859e-05]
[1.46089161e-05]
[1.46137653e-05]
[1.46207763e-05]
[1.46285628e-05]
[1.46355827e-05]
[1.46404432e-05]
[1.46421783e-05]]
prandtl_number : [[0.70766259]
[0.70766463]
[0.70767033]
[0.70767857]
[0.70768772]
[0.70769596]
[0.70770166]
[0.70770369]]
density : [[1.225 ]
[1.22482252]
[1.22432533]
[1.22360715]
[1.22281041]
[1.22209291]
[1.22159658]
[1.22141947]]
specific_energy : 958500.0
specific_power : 270000.0
watt_hour_rating : 12.78
min_energy : 306174849.75000006
initial_max_energy : 306174849.75000006
charging_voltage : 342.0
charging_current : 210.0
pack_temperature : [[288.15]
[288.15]
[288.15]
[288.15]
[288.15]
[288.15]
[288.15]
[288.15]]
cell_charge_throughput : [[0.]
[0.]
[0.]
[0.]
[0.]
[0.]
[0.]
[0.]]
R_growth_factor : 1
E_growth_factor : 1
ambient_temperature : [[288.15 ]
[288.14018998]
[288.11270293]
[288.07298307]
[288.02889743]
[287.98917772]
[287.96169088]
[287.95188095]]
ambient_pressure : [[101325. ]
[101306.87066351]
[101256.08742698]
[101182.74005999]
[101101.3811704 ]
[101028.1248627 ]
[100977.45517526]
[100959.37637288]]