公开(公告)号：US11543461B2

公开(公告)日：2023-01-03

申请号：US16744892

申请日：2020-01-16

Applicant: Infineon Technologies AG

Inventor： Andreas Berger ,  Klaus Hoermaier ,  Guenter Hofer ,  Stefano Marsili ,  Akshay Misra ,  Matthias Rose ,  Christian Winkler

IPC: G01R31/396 ,  H03M1/12 ,  G01R31/3842 ,  G01R31/389 ,  G01R31/392

Abstract: 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.

公开(公告)号：US11372054B2

公开(公告)日：2022-06-28

申请号：US16657259

申请日：2019-10-18

Applicant: Infineon Technologies AG

Inventor： Stefano Marsili ,  Klaus Hoermaier ,  Akshay Misra ,  Filippo Rosetti

IPC: G01R31/389 ,  G01R31/36

Abstract: 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.

公开(公告)号：US20210223327A1

公开(公告)日：2021-07-22

申请号：US16744892

申请日：2020-01-16

Applicant: Infineon Technologies AG

Inventor： Andreas Berger ,  Klaus Hoermaier ,  Guenter Hofer ,  Stefano Marsili ,  Akshay Misra ,  Matthias Rose ,  Christian Winkler

IPC: G01R31/396 ,  H03M1/12 ,  G01R31/389 ,  G01R31/3842 ,  G01R31/392

Abstract: 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.