This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Methods for State-Of-Function Algorithm Validation
Technical Paper
2017-01-1219
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Validation of the State-Of-Function (SOF) algorithm and associated cell models are critical for battery management as they are responsible for optimal pack power utilization as well as safety protection and life. The SOF accomplishes this optimization task by communicating pack level operation limits related to power, current, voltage and temperature. These operation limits are, in some cases, estimated via parameters and equations derived from cell models. Correspondingly, any errors within the cell models will propagate into the model-dependent SOF limits.
Understanding the source of errors and thus finding areas for improvement requires a visualization-based SOF validation strategy. In this work, we define and demonstrate an automated validation approach comprised of: (1) creating an array of pulse events that span the operation boundaries for the application of interest; (2) modeling the cell and SOF pack response for each pulse event (3) measuring the cell and SOF pack response for each pulse event (4) comparing the modeled and measured responses for each pulse event, and (5) creating an interactive software environment to explore each pulse event visually.
Our initial goal is to develop an environment in which model, SOF and measurement responses can be qualitatively contrasted and compared in order to facilitate rapid error identification and correction.
Authors
Topic
Citation
Rinaldo, S., Jin, Z., and Wyatt, P., "Methods for State-Of-Function Algorithm Validation," SAE Technical Paper 2017-01-1219, 2017, https://doi.org/10.4271/2017-01-1219.Also In
References
- Doyle , M. , Fuller , T. F. , and Newman , J. Modeling of galvanostatic charge and discharge of the lithium/polymer/insertion cell Journal of the Electrochemical Society 140 6 1526 1533 1993
- Harris , S. J. Direct in situ measurements of Li transport in Li-ion battery negative electrodes Chemical Physics Letters 485 4 265 274 2010
- Hu , X. , Li , S. , and Peng , H. A comparative study of equivalent circuit models for Li-ion batteries Journal of Power Sources 198 359 367 2012
- Liaw , B. Y. Modeling of lithium ion cells: A simple equivalent-circuit model approach Solid State Ionics 175 1 835 839 2004
- Plett , G. L. ECE5710: Equivalent-Circuit Cell Models http://mocha-java.uccs.edu/ECE5710/ECE5710-Notes02.pdf 2016
- Wampler , I. Battery Impedance and Power Capability Estimator and Methods of Making and Using the Same US Patent 20160077160A1 Mar. 2016