Described from: literature
Parameter Set · published 2026-11-02
Taken from the BPX parameter set Test case: blended electrode definition with two particle sizes but equivalent chemistry. Compare to nmc_pouch_cell_BPX.json in About:Energy open-source release., written for a DFN model (BPX 0.4.0). Source: github.com/FaradayInstitution/BPX. Curated by Simon Clark.
A test case in the BPX standard's examples (FaradayInstitution/BPX, MIT licence, commit 9b73d69), built from About:Energy Limited's NMC111 pouch cell parameterisation (December 2022).
| Parameter | Value | Unit |
|---|---|---|
| Reference temperature | 298.15 | K |
| Lower voltage cut-off | 2.7 | V |
| Upper voltage cut-off | 4.2 | V |
| Nominal cell capacity | 12.5 | Ah |
| Specific heat capacity | 913 | J/(kg·K) |
| Thermal conductivity | 2.04 | W/(m·K) |
| True density | 1847 | kg/m³ |
| Electrode area, one electrode pair | 0.016808 | m² |
| Number of electrode pairs | 34 | |
| External surface area | 0.0379 | m² |
| Cell volume | 1.28 × 10⁻⁴ | m³ |
| Parameter | Value | Unit |
|---|---|---|
| Particle radius | 4.12 × 10⁻⁶fitted | m |
| Solid-phase diffusivity | 2.728 × 10⁻¹⁴fitted | m²/s |
| Open-circuit potential | 9.47057878e-01 * exp(-1.59418743e+02 * x) - 3.50928033e+04 + 1.64230269e-01 * tanh(-4.55509094e+01 * (x - 3.24116012e-02 )) + 3.69968491e-02 * tanh(-1.96718868e+01 * (x - 1.68334476e-01)) + 1.91517003e+04 * tanh(3.19648312e+00 * (x - 1.85139824e+00)) + 5.42448511e+04 * tanh(-3.19009848e+00 * (x - 2.01660395e+00))of xfitted | |
| Entropic change coefficient | (-0.1112 * x + 0.02914 + 0.3561 * exp(-((x - 0.08309) ** 2) / 0.004616)) / 1000of xfitted | |
| Reaction rate constant | 5.199 × 10⁻⁶fitted | mol·m⁻²·s⁻¹ |
| Minimum stoichiometry | 0.005504fitted | |
| Maximum stoichiometry | 0.75668fitted | |
| Maximum lithium concentration | 29730fitted | mol/m³ |
| Diffusivity activation energy | 30000fitted | J/mol |
| Reaction rate constant activation energy | 55000fitted | J/mol |
| Parameter | Negative electrode | Positive electrode | Unit |
|---|---|---|---|
| Layer thickness | 5.62 × 10⁻⁵fitted | 5.23 × 10⁻⁵fitted | m |
| Electronic conductivity | 0.222fitted | 0.789fitted | S/m |
| Surface area per unit volume | 499522fitted | – | m⁻¹ |
| Porosity | 0.25399fitted | 0.27749fitted | |
| Transport efficiency | 0.128fitted | 0.1462fitted |
| Parameter | Value | Unit |
|---|---|---|
| Layer thickness | 2 × 10⁻⁵fitted | m |
| Porosity | 0.47fitted | |
| Transport efficiency | 0.3222fitted |
| Parameter | Value | Unit |
|---|---|---|
| Cation transference number | 0.2594fitted | |
| Ionic conductivity | 0.1297 * (x / 1000) ** 3 - 2.51 * (x / 1000) ** 1.5 + 3.329 * (x / 1000)of xfitted | |
| Electrolyte diffusivity | 8.794e-11 * (x / 1000) ** 2 - 3.972e-10 * (x / 1000) + 4.862e-10of xfitted | |
| Conductivity activation energy | 17100fitted | J/mol |
| Diffusivity activation energy | 17100fitted | J/mol |
| Parameter | Value | Unit |
|---|---|---|
| Initial temperature | 298.15 | K |
| Initial salt concentration | 1000 | mol/m³ |
| Ambient temperature | 298.15 | K |
Values are rounded to five significant figures. Hover a value for the number as stated, or download the file for the full set.
Held in the source file but not in this record: Parameterisation/Positive electrode/Particle.
PyBaMM 26.10.1.1, DFN, 25 °C. No measured data in the file.
Loading the profiles through the cell…
# pip install "pybamm[bpx]==26.10.1.1"
import json
import urllib.request
import pybamm
iri = "https://w3id.org/battinfo/dataset/dpj6-1j9x-eetd-gs81"
# ?format=bpx redirects to the BPX file; the file host refuses Python's default User-Agent.
request = urllib.request.Request(iri + "?format=bpx", headers={"User-Agent": "bpx-example"})
params = pybamm.ParameterValues.create_from_bpx_obj(json.loads(urllib.request.urlopen(request).read()))
experiment = pybamm.Experiment(["Discharge at 12.5 A until 2.7 V"])
solution = pybamm.Simulation(pybamm.lithium_ion.DFN({"particle phases": ("1", "2")}), parameter_values=params, experiment=experiment).solve()
print(solution["Discharge capacity [A.h]"].entries[-1], "A h")| # | Role | Record | Identifier | Type |
|---|---|---|---|---|
| 01 | Parameter set | This record | dpj6-1j9x-eetd-gs81 | parameter set |
https://github.com/FaradayInstitution/BPX. Described in Battery Genome as BPX NMC111 pouch blended, https://w3id.org/battinfo/dataset/dpj6-1j9x-eetd-gs81.
Contributors · Simon Clark