Impedance based battery diagnosis for automotive applications

In this paper, a procedure is presented, which determines and predicts the pulse power capability of a battery by means of an impedance-based model. This is achieved by a passive impedance measurement technique, which allows using current ripple and fluctuations as a signal source. The advantage of the procedure is its direct determination of the pulse power capability while no indirect and difficult to determine state variables such as state of charge and state of health are needed.