System and method for anomaly detection and total capacity estimation of a battery
AssigneeAnalog Devices, Inc.
InventorsHemtej Gullapalli, Omer Tanovic, Johannes Traa, Erfan Soltanmohammadi
Life of this patent
Estimating the term…
Abstract
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.
Claims14
A method to monitor a battery, the method comprising:
- receiving a first impedance measurement from the battery in response to a first multi-frequency sweep after the battery is charged to substantially full charge using a constant current;
- receiving a second impedance measurement from the battery in response to a second multi-frequency sweep after a specified wait time measured from when the substantially full charge is saturated using a constant voltage;
- and
- based on the first and second impedance measurements, determining an estimated capacity of the battery using a regression model.
A method to detect an anomaly in a battery, the method comprising:
- receiving a first impedance measurement from the battery in response to a first multi-frequency sweep after the battery is charged to substantially full charge using a constant current;
- receiving a second impedance measurement from the battery in response to a second multi-frequency sweep after a specified wait time measured from when the substantially full charge is saturated using a constant voltage;
- and
- based on the first and second impedance measurements, detecting the anomaly in the battery.
A battery management system comprising:
- at least one hardware processor;
- and
- at least one memory storing instructions that, when executed by the at least one hardware processor, cause the at least one hardware processor to perform operations comprising:
- receiving a first impedance measurement from the battery in response to a first multi-frequency sweep after the battery is charged to substantially full charge using a constant current;
- receiving a second impedance measurement from the battery in response to a second multi-frequency sweep after a specified wait time measured from when the substantially full charge is saturated using a constant voltage;
- based on the first and second impedance measurements, generating an estimated capacity of the battery using a regression model;
- and
- detecting an anomaly in the battery.
Dependencies are inferred from the claim text.