Python Battery Mathematical Modelling (PyBaMM)

Published June 8, 2021 | Version 22.8

Software Open

Features

Added CurrentSigmoidOpenCircuitPotential model to model voltage hysteresis for charge/discharge (#2256)
Added "Chen2020_composite" parameter set for a composite graphite/silicon electrode. (#2256)
Added new cumulative variables Throughput capacity [A.h] and Throughput energy [W.h] to standard variables and summary variables, to assist with degradation studies. Throughput variables are only calculated if calculate discharge energy is set to true. Time [s] and Time [h] also added to summary variables. (#2249)
Added lipf6_OKane2022 electrolyte to OKane2022 parameter set (#2249)
Reformated submodel structure to allow composite electrodes. Composite positive electrode is now also possible. With current implementation, electrodes can have at most two phases. (#2248)

Bug fixes

Added new parameter Ratio of lithium moles to SEI moles (short name z_sei) to fix a bug where this number was incorrectly hardcoded to 1. (#2222)
Changed short name of parameter Inner SEI reaction proportion from alpha_SEI to inner_sei_proportion, to avoid confusion with transfer coefficients. (#2222)
Deleted legacy parameters with short names beta_sei and beta_plating. (#2222)
Corrected initial SEI thickness for OKane2022 parameter set. (#2218)

Optimizations

Simplified scaling for the exchange-current density. The dimensionless parameter C_r is kept, but no longer used anywhere (#2238)
Added limits for variables in some functions to avoid division by zero, sqrt(negative number), etc (#2213)

Breaking changes

Parameters specific to a (primary/secondary) phase in a domain are doubly nested. e.g. param.c_n_max is now param.n.prim.c_max (#2248)

Notes

If you use PyBaMM, please cite it as below.

Name	Size	Download all
pybamm-team/PyBaMM-v22.8.zip md5:9ba36a4bfa9b28ce4229f27780830f15	13.7 MB	Preview Download