Patent · US Active

Multi-cell AC impedance measurement system

US11543461B2 · kind B2 · utility

0Cited by

0References

7Claims

0Family size

Assignee

Infineon Technologies AG · DE

Inventors

Andreas Berger · Therwil, CH
Klaus Hoermaier · Krumpendorf, AT
Guenter Hofer · St. Oswald, AT
Stefano Marsili · Faak am See, AT
Akshay Misra · Munich, DE
Matthias Rose · Eindhoven, NL
Christian Winkler · Wernberg, AT

Key dates

Filing date	Jan 16, 2020
Grant date	Jan 3, 2023
Priority date	—
Expiry date	Jan 1, 2041

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02E60/10
WIPO fieldMeasurement
WIPO sectorInstruments

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.