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Technical roadmap review [2025]
#5064 · brosaplanella opened on Jun 17, 2025
7
Improve documentation (ongoing)
#3392 · brosaplanella opened on Oct 2, 2023
6

[Bug]: Ai2020 electrolyte_diffusivity_Ai2020 is 10^4 too large (cm²/s value returned as m²/s)
pybamm-team/PyBaMM#5887 · opened on Oct 9, 2026
Chayambuka2022: NVPF diffusivity interpolated at sto * c_e0 instead of sto * c_max (cathode 20-50x too fast)
pybamm-team/PyBaMM#5885 · opened on Oct 9, 2026
lead-acid example notebook intermittently times out in CI
pybamm-team/PyBaMM#5884 · opened on Oct 9, 2026
[Bug]: "contact resistance" lowers the voltage but adds no I²R heat with "x-full" and pouch thermal models
pybamm-team/PyBaMM#5879 · opened on Oct 8, 2026
[Bug]: Lumped thermal model fails to discretise with 1+1D current collectors
pybamm-team/PyBaMM#5878 · opened on Oct 8, 2026
[Bug]: Chen2020_composite cannot run a thermal model (per-phase electrode density)
pybamm-team/PyBaMM#5877 · opened on Oct 8, 2026
1
[Bug]: Heat of mixing fails to discretise with a quadratic or quartic particle profile
pybamm-team/PyBaMM#5876 · opened on Oct 8, 2026
[Bug]: ParameterValues.update silently adds a misspelt key; the simulation runs on the unchanged default (opt-in strict check?)
pybamm-team/PyBaMM#5874 · opened on Oct 8, 2026
2
Benchmark non-default model options (e.g. lumped thermal) in PR Bencher runs
pybamm-team/PyBaMM#5873 · opened on Oct 8, 2026
FiniteVolume: harmonic face averaging of a bare gradient's factor under Division/Addition
pybamm-team/PyBaMM#5863 · opened on Oct 7, 2026
[Bug]: upwind/downwind operators use the wrong ghost point
pybamm-team/PyBaMM#5860 · opened on Oct 7, 2026
Decide how an ExplicitTimeIntegral treats a gap between joined solutions
pybamm-team/PyBaMM#5847 · opened on Oct 5, 2026
[Bug]: An expression of a time integral fails when the integrand doesn't depend on the state
pybamm-team/PyBaMM#5846 · opened on Oct 5, 2026
[Bug]: Joining solutions with and without sensitivities returns another solve's sensitivities
pybamm-team/PyBaMM#5845 · opened on Oct 5, 2026
1
SEI film resistance loss is not included in heat generation
pybamm-team/PyBaMM#5820 · opened on Sep 28, 2026
1
Refactor battery-model option resolution and validation (tracking)
pybamm-team/PyBaMM#5812 · opened on Sep 28, 2026
[Bug]: Defaults derived from "SEI", "SEI on cracks" and "lithium plating" only handle the scalar and negative-electrode tuple forms
pybamm-team/PyBaMM#5807 · opened on Sep 26, 2026
[Bug]: SPM(options) mutates the caller's options dict
pybamm-team/PyBaMM#5801 · opened on Sep 25, 2026
[Bug]: SPM.__init__ compares a class to the string "MPM"
pybamm-team/PyBaMM#5800 · opened on Sep 25, 2026
[Bug]: Heat of mixing fails with a linear Interpolant OCP or entropic change
pybamm-team/PyBaMM#5799 · opened on Sep 25, 2026
1
[Bug]: Heat of mixing crashes with a cubic Interpolant OCP or entropic change
pybamm-team/PyBaMM#5798 · opened on Sep 25, 2026
Heat of mixing for composite (multi-phase) electrodes
pybamm-team/PyBaMM#5792 · opened on Sep 25, 2026
Positive Electrode Degradation
pybamm-team/PyBaMM#5780 · opened on Sep 23, 2026
Are standard DFN (1+1D) and custom BasicDFN2D mathematically equivalent? Questions on underlying architectures.
pybamm-team/PyBaMM#5778 · opened on Sep 23, 2026
BaseModel.parameters misses Parameter symbols in Variable metadata
pybamm-team/PyBaMM#5752 · opened on Sep 14, 2026

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[Bug]: Ai2020 electrolyte_diffusivity_Ai2020 is 10^4 too large (cm²/s value returned as m²/s)

Chayambuka2022: NVPF diffusivity interpolated at sto * c_e0 instead of sto * c_max (cathode 20-50x too fast)

lead-acid example notebook intermittently times out in CI

[Bug]: "contact resistance" lowers the voltage but adds no I²R heat with "x-full" and pouch thermal models

[Bug]: Lumped thermal model fails to discretise with 1+1D current collectors

[Bug]: Chen2020_composite cannot run a thermal model (per-phase electrode density)

[Bug]: Heat of mixing fails to discretise with a quadratic or quartic particle profile

[Bug]: ParameterValues.update silently adds a misspelt key; the simulation runs on the unchanged default (opt-in strict check?)

Benchmark non-default model options (e.g. lumped thermal) in PR Bencher runs

FiniteVolume: harmonic face averaging of a bare gradient's factor under Division/Addition

[Bug]: `upwind`/`downwind` operators use the wrong ghost point

Decide how an ExplicitTimeIntegral treats a gap between joined solutions

[Bug]: An expression of a time integral fails when the integrand doesn't depend on the state

[Bug]: Joining solutions with and without sensitivities returns another solve's sensitivities

SEI film resistance loss is not included in heat generation

Refactor battery-model option resolution and validation (tracking)

[Bug]: Defaults derived from "SEI", "SEI on cracks" and "lithium plating" only handle the scalar and negative-electrode tuple forms

[Bug]: `SPM(options)` mutates the caller's options dict

[Bug]: `SPM.init` compares a class to the string `"MPM"`

[Bug]: Heat of mixing fails with a linear `Interpolant` OCP or entropic change

[Bug]: Heat of mixing crashes with a cubic `Interpolant` OCP or entropic change

Heat of mixing for composite (multi-phase) electrodes

Positive Electrode Degradation

Are standard DFN (1+1D) and custom BasicDFN2D mathematically equivalent? Questions on underlying architectures.

BaseModel.parameters misses Parameter symbols in Variable metadata