Addressing the Observability Problem in Batteries: Algorithm Design for Electrode-level Charge and Health Estimation

Sara Sattarzadeh, Satadru Dey, Andrew Colclasure, Kandler Smith

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

From real-time battery estimation viewpoint, weak observability of individual electrode states from terminal voltage measurement is a major barrier. Nevertheless, such electrode-level information can help expand usable energy/power as well as lifespan of the battery cell by enabling electrode-level limit based battery control. Motivated by these promising improvements, we present a real-time framework for estimating charge and health of individual electrodes. Essentially, the weak observability of the electrodes is addressed by decomposing the overall estimation problem into two sub-estimators that work in a cascaded manner to provide charge and health information for individual electrodes. The performance of the proposed scheme is illustrated by using an experimentally identified battery model that considers essential nonlinearities in electrodes' Open Circuit Potential (OCP) functions and resistances as well as dominant Solid Electrolyte Interphase (SEI) aging mechanism. Simulation case studies are presented based on this identified model which validate the effectiveness of the proposed framework.

Original languageEnglish (US)
Title of host publication2020 American Control Conference, ACC 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1131-1136
Number of pages6
ISBN (Electronic)9781538682661
DOIs
StatePublished - Jul 2020
Event2020 American Control Conference, ACC 2020 - Denver, United States
Duration: Jul 1 2020Jul 3 2020

Publication series

NameProceedings of the American Control Conference
Volume2020-July
ISSN (Print)0743-1619

Conference

Conference2020 American Control Conference, ACC 2020
CountryUnited States
CityDenver
Period7/1/207/3/20

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Addressing the Observability Problem in Batteries: Algorithm Design for Electrode-level Charge and Health Estimation'. Together they form a unique fingerprint.

Cite this