Infineon Technologies Ag

Akshay Misra

Stefano Marsili

Klaus Hoermaier

Guenter Hofer

Andreas Berger

Matthias Rose

Filippo Rosetti

Christian Winkler

A method for measuring a complex impedance of a plurality of battery cells in a battery pack comprises controlling an excitation current through the plurality of battery cells in the battery pack; receiving, in a single common measurement circuit, a plurality of voltage signals corresponding to the plurality of battery cells; measuring the excitation current; and calculating a complex impedance of each of the battery cells in the plurality of battery cells based on the plurality of voltage signals and the measured excitation current in a single measurement cycle using either one analog-to-digital converter (ADC) per battery cell or two matched ADCs per battery cell.

Multi-cell AC impedance measurement system

A device for battery impedance measurement includes a switched capacitor network, a controller configured to operate the switched capacitor network to cause an alternating current to flow between a battery and an energy storage; and measurement circuitry configured to measure the alternating current flowing to or from the battery and a voltage across the battery.

Device and method for battery impedance measurement

Growing community of inventors

Munich, Germany

Akshay Misra