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Fixed domain mismatch bug when using lithium plating with SPM #4844

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merged 14 commits into from
Feb 24, 2025
Merged

Fixed domain mismatch bug when using lithium plating with SPM #4844

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5e86050
Fixed bug that caused a domain mismatch when using lithium plating wi…
DrSOKane Feb 13, 2025
c9bd67e
Updated cycling_ageing example to prove the fix works
DrSOKane Feb 13, 2025
40e2fa9
style: pre-commit fixes
pre-commit-ci[bot] Feb 13, 2025
01f04de
Merge branch 'develop' of https://github.com/pybamm-team/PyBaMM into …
DrSOKane Feb 13, 2025
a46f7dd
changelog
DrSOKane Feb 13, 2025
006f9ac
Merge branch 'lithium-plating-SPM' of https://github.com/DrSOKane/PyB…
DrSOKane Feb 13, 2025
9cd455e
Added missing comma in cycling_ageing example
DrSOKane Feb 13, 2025
58dfb6c
cycling_ageing definitely works this time
DrSOKane Feb 13, 2025
2c4c9ba
Added 'Volume-averaged' lithium plating variables
DrSOKane Feb 14, 2025
013617f
Merge branch 'develop' into lithium-plating-SPM
rtimms Feb 17, 2025
4ea262b
changelog
DrSOKane Feb 21, 2025
bedb484
changelog
DrSOKane Feb 21, 2025
aefa246
Merge branch 'lithium-plating-SPM' of https://github.com/DrSOKane/PyB…
DrSOKane Feb 21, 2025
8b226de
Merge branch 'develop' into lithium-plating-SPM
rtimms Feb 23, 2025
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1 change: 1 addition & 0 deletions CHANGELOG.md
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Expand Up @@ -22,6 +22,7 @@

## Bug fixes

- Fixed a bug that caused the variable `"Loss of lithium due to {domain} lithium plating"`to have the domain `"current collector"` (should not have any domain at all) if the `"x-average side reactions"` option was set to `"true"`. ([#4844](https://github.com/pybamm-team/PyBaMM/pull/4844))
- Fixed a bug which caused the ec-reaction limited SEI model to give
incorrect results ([#4774](https://github.com/pybamm-team/PyBaMM/pull/4774))

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6 changes: 4 additions & 2 deletions examples/scripts/cycling_ageing.py
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Expand Up @@ -66,14 +66,16 @@
"Discharge capacity [A.h]",
"Electrolyte potential [V]",
"Electrolyte concentration [mol.m-3]",
"Negative total SEI thickness [m]",
"Negative electrode porosity",
"X-averaged negative electrode porosity",
"X-averaged negative electrode SEI interfacial current density [A.m-2]",
"X-averaged negative electrode lithium plating interfacial current density "
"[A.m-2]",
"X-averaged negative total SEI thickness [m]",
"X-averaged negative dead lithium concentration [mol.m-3]",
[
"Total lithium lost [mol]",
"Loss of lithium to negative SEI [mol]",
"Loss of lithium to negative lithium plating [mol]",
],
]
)
12 changes: 7 additions & 5 deletions src/pybamm/models/submodels/interface/lithium_plating/base_plating.py
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Expand Up @@ -79,12 +79,14 @@ def _get_standard_concentration_variables(self, c_plated_Li, c_dead_Li):
c_to_L = self.param.V_bar_Li / phase_param.a_typ
L_k = self.param.p.L

c_plated_Li_av = pybamm.x_average(c_plated_Li)
c_plated_Li_xav = pybamm.x_average(c_plated_Li)
c_plated_Li_av = pybamm.yz_average(c_plated_Li_xav)
L_plated_Li = c_plated_Li * c_to_L # plated Li thickness
L_plated_Li_av = pybamm.x_average(L_plated_Li)
Q_plated_Li = c_plated_Li_av * L_k * self.param.L_y * self.param.L_z

c_dead_Li_av = pybamm.x_average(c_dead_Li)
c_dead_Li_xav = pybamm.x_average(c_dead_Li)
c_dead_Li_av = pybamm.yz_average(c_dead_Li_xav)
# dead Li "thickness", required by porosity submodel
L_dead_Li = c_dead_Li * c_to_L
L_dead_Li_av = pybamm.x_average(L_dead_Li)
Expand All @@ -94,12 +96,12 @@ def _get_standard_concentration_variables(self, c_plated_Li, c_dead_Li):
f"{Domain} {phase_name}lithium plating concentration "
"[mol.m-3]": c_plated_Li,
f"X-averaged {domain} {phase_name}lithium plating concentration "
"[mol.m-3]": c_plated_Li_av,
"[mol.m-3]": c_plated_Li_xav,
f"{Domain} {phase_name}dead lithium concentration [mol.m-3]": c_dead_Li,
f"X-averaged {domain} {phase_name}dead lithium concentration "
"[mol.m-3]": c_dead_Li_av,
"[mol.m-3]": c_dead_Li_xav,
f"{Domain} {phase_name}lithium plating thickness [m]": L_plated_Li,
f"X-averaged {domain} {phase_name} lithium plating thickness "
f"X-averaged {domain} {phase_name}lithium plating thickness "
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Thanks @DrSOKane looks good! Can you also add the relevant “Volume-averaged…” variables?

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That would be consistent with the definition of "volume-averaged" in the thermal submodel. However, in the particle submodel, "volume-averaged" is used to denoted the x-average of the r-averaged concentration. What term should be used instead?

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I think it is ok, since plated Lithium is on the surface (i.e. doesn’t depend on r).

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OK, I did that. Now I can start on the variable change for the SEI. That PR is so old I will probably just close it and start a new one.

"[m]": L_plated_Li_av,
f"{Domain} {phase_name}dead lithium thickness [m]": L_dead_Li,
f"X-averaged {domain} {phase_name}dead lithium thickness [m]": L_dead_Li_av,
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