Executable envelope
84 tests and 10 subtests passed for integration methods, interval profiles, energy balance, radiation, reversible heat, external sources, limits, and invalid inputs.
Research notes · Engineering notes and validation guide
Battery Thermal Modeling Notes
Turn a thermal equation into an evidence chain another engineer can challenge.
An executable lumped-cell reference is surrounded by curated guidance for heat-source selection, boundary conditions, parameter traceability, data quality, uncertainty, and validation decisions.
Engineering question
What evidence chain is needed to move a battery thermal claim from an equation or source into a reviewable engineering decision?
Connect an executable lumped thermal reference to assumption control, boundary-condition review, source confidence, uncertainty, and validation traceability.
System and evidence boundary
The model is only one rung in the fidelity and evidence ladder.
The repository separates heat-flow logic, model-fidelity choice, and validation governance so a simple response is not mistaken for full pack evidence.
Heat-generation and rejection pathway
- 01Current + resistanceIrreversible I²R heat
- 02Entropic + external termsOptional signed sources
- 03Thermal capacitanceStored energy
- 04Convection + radiationBoundary-condition heat rejection
- 05Temperature + limitsTrace and exposure metrics
Model-fidelity ladder
- 01Lumped cellFast sensitivity and energy balance
- 02Module networkCell spread and coolant interaction
- 03Spatial modelInternal gradients and geometry
- 04CFD / FEA / experimentHigh-fidelity or measured validation
Validation evidence chain
- 01ClaimDecision-relevant statement
- 02Parameter sourceConfidence and provenance
- 03Model assumptionBoundary and omitted physics
- 04Test conditionProfile, sensors, environment
- 05MetricTolerance and uncertainty
- 06Human decisionAccept, revise, or escalate fidelity
Verified results
Figures keep scenario, units, source, and evidence class attached.
Every visual below points to its source data or retained source format and to the release- or commit-specific implementation behind it.
Pulse thermal response and energy flows
Regenerated from the committed pulse profile with the repository CLI. The explicit-Euler result reports peak and final temperature plus a near-zero energy-balance error; inputs are illustrative.
- Provenance
- 14e399f · 14e399fb20b3 · verified 2026-07-28
- Reproduce
python scripts/generate-open-engineering-figures.py --sources-root <audit-root>
Validation and evidence
What passed, what was demonstrated, and what remains unvalidated.
Eighty-four tests and ten subtests passed for the executable thermal model and its validation envelope.
Curated guidance
The public page selects the useful modeling and validation notes; achievement-practice files present in the repository are intentionally not surfaced.
Source confidence
Templates connect each parameter or literature claim to source strength, assumptions, test conditions, metrics, and decisions.
No qualification claim
The repository is a research and validation resource, not a calibrated cell, module, pack, runaway, or certification model.
Shortest verified path
Pin the audited source before running it.
git clone https://github.com/mohammadrezwankhan/battery-thermal-modeling-notes.git
cd battery-thermal-modeling-notes
git checkout 14e399fb20b37ae689f22189976fd259c2943970
python models/lumped_cell_thermal.py --profile-csv models/data/pulse_current_profile.csv --output-csv results/pulse_thermal_intervals.csv
python -m unittest discover -s tests -vVerification environment: Python 3.14.6 on Windows 11. Commands are concise entry points; repository documentation remains authoritative for setup details.
Documentation map
Go directly to the useful evidence.
Engineering boundary
The artifact cannot qualify the decision by itself.
- The plotted profile, coefficients, and boundary conditions are illustrative and are not cell-characterization data.
- A lumped result cannot establish internal gradients, local hotspots, cooling-channel performance, thermal propagation, or runaway safety.
- Material properties, heat generation, contact resistances, convection, radiation, sensors, and acceptance metrics require traceable project sources.
- Escalate to module networks, spatial models, CFD/FEA, or experiments when the decision depends on geometry or nonuniformity.
Related professional context
Follow the evidence into adjacent work.
Use the pinned source, inspect the evidence, and keep project authority with a qualified human reviewer.
Open 14e399f
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