DETERMINATION OF NOMINAL CELL RESISTANCE FOR REAL-TIME ESTIMATION OF STATE-OF-CHARGE IN LITHIUM BATTERIES
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Aug 13, 2015
app pub date -
Feb 10, 2015
filing date -
Feb 12, 2014
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Abstract
A functional relation relationship has been established between SOC, nominal resistance (Rnom) and average applied load (Pavg), such that a function f(Rnom, Pavg)=SOC can be determined empirically. Load can be described using either average power or average current. The cell is tested initially to determine the relationships among these values prior to operation to create a look-up table. During operation, Rnom and Pavg can be sampled with no cell down time and can be used as input parameters with the look-up table to determine SOC accurately.
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