Electrochemical impedance spectroscopy excitation through battery passive balancing circuit

Abstract

Systems, apparatuses, and methods for electrochemical impedance spectroscopy (EIS) for use with batteries are provided, including for a battery passive balancing circuit that may be used to generate a stimulus signal for EIS analysis of one or more batteries. An exemplary system may comprise a first battery cell with a first charge and a second battery cell with a second charge. Battery balancing circuitry generates a balancing signal to balance the charges. The battery balancing circuitry transmits the balancing signal to an EIS circuitry. The EIS circuitry provides a stimulus signal to one of the battery cells based on the first balancing signal, receives a response signal based on the stimulus signal, and generates at least one output signal based on the response signal. A battery management system receives the at least one output signal and generates an impedance.