Battery voltameter circuit

Abstract

A circuit includes a processing circuit (400). The processing circuit (400) is configured to model a battery using a battery model. The battery model includes a voltage terminal, an RC stage having a first resistor and a first capacitor in parallel, a second resistor, a second capacitor, and a ground terminal. The second resistor is coupled between the voltage terminal and the RC stage. The RC stage is coupled between the second resistor and the second capacitor. The second capacitor is coupled between the RC stage and the ground terminal. The processing circuit is further configured to determine a first resistance of the first resistor based on a first ratio of the first resistance to a total battery resistance, determine a second resistance based on a second ratio of a second resistance of the second resistor to the total battery resistance, and determine the total battery resistance.

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