公开(公告)号：US20220026496A1

公开(公告)日：2022-01-27

申请号：US17384148

申请日：2021-07-23

Applicant: Hemtej Gullapalli ,  Erfan Soltanmohammadi ,  Han Zhang ,  Michael W. O'Brien

Inventor： Hemtej Gullapalli ,  Erfan Soltanmohammadi ,  Han Zhang ,  Michael W. O'Brien

IPC: G01R31/3835 ,  G01R31/367 ,  G01K7/02 ,  G01R31/378 ,  G01R31/374 ,  G01R31/389

Abstract: 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.