Patent ID: 9500713
Filing Date: 2016-11-22
CPC Classification: G01R

Claim Text:
1. A method to determine a state of charge of a battery using monitoring circuitry and control circuitry, wherein the battery includes at least two terminals and an anode that exhibits hysteretic voltage-state of charge dependence, the method comprising: determining whether the battery is in a charge mode of operation or a discharge mode of operation; measuring, with the monitoring circuitry, a terminal voltage of the battery, wherein the terminal voltage is a voltage measured between two terminals of the battery, wherein one of the two terminals is connected to the anode and the other of the two terminals is connected to a cathode of the battery; selecting, using the control circuitry, a predetermined relationship between (i) the terminal voltage of the battery and (ii) the state of charge of the battery from a plurality of relationships comprising: determining, using the control circuitry, the state of charge of the battery using the terminal voltage and the selected relationship.