DATA DRIVEN/PHYSICAL HYBRID MODEL FOR SOC DETERMINATION IN LITHIUM BATTERIES
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United States of America Patent
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Mar 19, 2015
app pub date -
Sep 19, 2013
filing date -
Sep 19, 2013
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Abstract
A hybrid model to determine state-of-charge for lithium batteries includes both a physical model and an empirical or data-driven model. The physical model is an electrochemical model, based on the battery materials properties and structure and describes dynamic electrochemical reactions. The empirical model uses coulomb counting and a relaxation filter, plus a Kalman filter for adaptive compensation of the system parameters. In some SOC regimes, one model is strongly favored over the other. In some SOC regions, a weighted combination of the two models is used.
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