This application note examines and compares the different algorithms used to gauge batteries including voltage correlation, voltage + IR correction, coulomb counting, CEDV, and Impedance Track.
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Estimating a battery’s State of Charge is a challenging task, and many different types of algorithms have been used to try to achieve this with the lowest accuracy error. Some of the most common algorithms used today include: voltage correlation, voltage + IR correlation, and coulomb counting. By comparing these generic gauging algorithms to TI’s Impedance Track algorithm shows why Impedance Track has the highest accuracy battery gauging.