Described from: literature
Parameter Set · published 2026-11-02
BPX export of the BattMo parameter set used in runValidation.m. Both electrodes: kinetics are approximated by a single BPX reaction-rate constant fitted to each BattMo j0(soc) table at nominal electrolyte concentration. Geometric surface areas preserve active volume; kinetic constants absorb area scaling. OCP tables are linearly extrapolated to stoichiometry endpoints. Geometry, nominal capacity and upper cutoff are supplementary inputs. Source: IMP5-70-120-H0B_graphite-lnmo_schmitt-2026_validation.battmo.json. Geometry: h0b-geometry-3d.json.
https://w3id.org/battinfo/dataset/7jnc-cjtw-5h3a-5t52Taken from the BPX parameter set HYDRA graphite/LNMO validation parameter set, written for a DFN model (BPX 1.0). Source: arxiv.org/abs/2601.10507. Curated by Simon Clark.
Parameters from Schmitt et al. 2026, 'Comprehensive parameter and electrochemical dataset for a 1 Ah graphite/LNMO battery cell for physical modelling' (arXiv:2601.10507), released by the authors under CC-BY-4.0. The file is the BPX export in BattMoTeam/schmitt-2026-lnmo-graphite-hydra-publication at commit 5109270; that repository's GPL-3.0-or-later licence covers its code.
Calibrated against the HYDRA0 measurements published at https://doi.org/10.5281/zenodo.18256663 (CC-BY-4.0). The file's Validation section holds five discharge-rate curves from that campaign.
| Parameter | Value | Unit |
|---|---|---|
| Electrode area, one electrode pair | 0.0025 | m² |
| External surface area | 0.005752 | m² |
| Cell volume | 9.4 × 10⁻⁶ | m³ |
| Number of electrode pairs | 20 | |
| Lower voltage cut-off | 3.5 | V |
| Upper voltage cut-off | 4.9 | V |
| Nominal cell capacity | 1 | Ah |
| Reference temperature | 298.15 | K |
| Parameter | Negative electrodeGraphite | Positive electrodeLNMO | Unit |
|---|---|---|---|
| Minimum stoichiometry | 0fitted | 0.12825fitted | |
| Maximum stoichiometry | 0.78583fitted | 0.88428fitted | |
| Maximum lithium concentration | 31360fitted | 23761fitted | mol/m³ |
| Particle radius | 1.63 × 10⁻⁵fitted | 8.94 × 10⁻⁶fitted | m |
| Solid-phase diffusivity | 1.4273 × 10⁻¹³fitted | 3.4597 × 10⁻¹⁴fitted | m²/s |
| Diffusivity activation energy | 13820fitted | 5630fitted | J/mol |
| Open-circuit potential | 42-point curveagainst stoichiometryfitted | 36-point curveagainst stoichiometryfitted | V |
| Entropic change coefficient | 0fitted | 0fitted | V/K |
| Reaction rate constant | 0.0015392fitted | 9.3006 × 10⁻⁵fitted | mol·m⁻²·s⁻¹ |
| Reaction rate constant activation energy | – | 0fitted | J/mol |
| Parameter | Negative electrode | Positive electrode | Unit |
|---|---|---|---|
| Surface area per unit volume | 1.0345 × 10⁵fitted | 1.8785 × 10⁵fitted | m⁻¹ |
| Layer thickness | 5.65 × 10⁻⁵fitted | 7.65 × 10⁻⁵fitted | m |
| Porosity | 0.40065fitted | 0.32664fitted | |
| Transport efficiency | 0.18205fitted | 0.152fitted | |
| Electronic conductivity | 62fitted | 18fitted | S/m |
| Parameter | Value | Unit |
|---|---|---|
| Layer thickness | 2.5 × 10⁻⁵fitted | m |
| Porosity | 0.48fitted | |
| Transport efficiency | 0.03593fitted |
| Parameter | Value | Unit |
|---|---|---|
| Cation transference number | 0.226fitted | |
| Electrolyte diffusivity | 301-point curveagainst concentration / mol/m³fitted | m²/s |
| Ionic conductivity | 301-point curveagainst concentration / mol/m³fitted | S/m |
| Parameter | Value | Unit |
|---|---|---|
| Initial temperature | 298.15 | K |
| Initial salt concentration | 1200 | 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.
The file carries these outside the BPX standard, in its User-defined block. The record keeps them as written and gives them no standard meaning.
| Negative electrode total solid volume fraction | 0.59935 |
|---|---|
| Positive electrode total solid volume fraction | 0.67336 |
| Negative electrode active material share within solids | 0.93783 |
| Positive electrode active material share within solids | 0.83133 |
| Negative electrode active material volume fraction | 0.56209 |
| Positive electrode active material volume fraction | 0.55978 |
| Negative electrode inactive solid volume fraction | 0.03726 |
| Positive electrode inactive solid volume fraction | 0.11358 |
| Open-circuit voltage at 0% SOC [V] | 2.6531 |
| Open-circuit voltage at 100% SOC [V] | 4.8759 |
| BattMo negative electrode volumetric surface area [m-1] | 1.54 × 10⁶ |
| BattMo positive electrode volumetric surface area [m-1] | 2.2228 × 10⁵ |
| BPX negative electrode surface area per unit volume [m-1] | 1.0345 × 10⁵ |
| BPX positive electrode surface area per unit volume [m-1] | 1.8785 × 10⁵ |
| BattMo negative electrode exchange-current density j0 [A.m-2] | 23-point table |
| BattMo positive electrode exchange-current density j0 [A.m-2] | 23-point table |
| BattMo negative electrode BPX-fitted reaction rate constant [mol.m-2.s-1] | 0.0015392 |
Held in the source file but not in this record: Validation.
PyBaMM 26.10.1.1, DFN, 25 °C. Dotted: measured data from the file.
| Measured discharge | Rate | RMSE | Largest difference | Capacity difference |
|---|---|---|---|---|
| 0.05 A | 0.05C | 9.5 mV | 55.8 mV | -0.3% |
| 0.2 A | 0.2C | 9.9 mV | 42.5 mV | -0.1% |
| 0.5 A | 0.5C | 22.5 mV | 90.4 mV | +0.4% |
| 1 A | 1C | 30.4 mV | 119 mV | +0.6% |
| 2 A | 2C | 18.7 mV | 114 mV | -0.8% |
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/7jnc-cjtw-5h3a-5t52"
# ?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 1 A until 3.5 V"])
solution = pybamm.Simulation(pybamm.lithium_ion.DFN(), 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 | 7jnc-cjtw-5h3a-5t52 | parameter set |
https://arxiv.org/abs/2601.10507. Described in Battery Genome as BPX LNMO pouch, https://w3id.org/battinfo/dataset/7jnc-cjtw-5h3a-5t52.
Contributors · Simon Clark