A Parametric Open Circuit Voltage Model for Lithium Ion Batteries

By Christoph R. Birkl, Euan McTurk, M. Roberts, P. Bruce, David A. Howey. 2015

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We present an open circuit voltage (OCV) model for lithium ion (Li-ion) cells, which can be parameterized by measurements of the OCV of positive and negative electrode half-cells and a full cell. No prior knowledge of physical parameters related to particular cell chemistries is required. The OCV of the full cell is calculated from two electrode sub-models, which are comprised of additive terms that represent the phase transitions of the active electrode materials. The model structure is flexible and can be applied to any Li-ion cell chemistry. The model can account for temperature dependence and voltage hysteresis of the OCV. Fitting the model to

Subfields: Automotive Engineering, Electrical and Electronic Engineering

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