Analog Devices International Unlimited Company

Analog Devices,inc.

Erfan Soltanmohammadi

Hemtej Gullapalli

Michael William O'Brien

Han Zhang

Omer Tanovic

Johannes Traa

Sensors and methods for determining the state of charge of a battery are described. The state of charge is determined in some instances by applying a current perturbation having a frequency to the battery terminals, monitoring the response signal, and determining the phase of the response signal. The phase may be correlated to the state of charge of the battery, so that once the phase is determined, a determination of the state of charge of the battery may be made. In some situations, the state of charge may be used to determine the operating condition of a load connected to the battery. In some embodiments, the state of charge may be used to determine whether the battery is defective.

Tracking state of charge of a non-rechargeable battery using impedance spectroscopy

The battery monitoring techniques described herein may be used for detection of battery anomalies or faults. Also, the battery monitoring techniques described herein may be used to generate estimates of total battery capacity. The battery monitoring techniques may employ an alternating current frequency response (ACFR) of the battery. The ACFR response of the battery may be used to detect anomalies and/or estimate a total capacity of the battery.

System and method for anomaly detection and total capacity estimation of a battery

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Melrose, MA, United States of America

Erfan Soltanmohammadi