Patent · US Active

Method for determining a state of at least one cell of a battery, and data-processing system

US12130337B2 · kind B2 · utility

0Cited by

2References

12Claims

0Family size

Assignee

VOLKSWAGEN AKTIENGESELLSCHAFT · DE

Inventors

Christian Wick · Meitingen, DE
Stephan Gloger · Berlin, DE
Sascha Beaury · Gifhorn, DE

Key dates

Filing date	Apr 12, 2021
Grant date	Oct 29, 2024
Priority date	—
Expiry date	Oct 26, 2041

Classification

Technology area (CPC G)Physics
CPC primaryG01R25/04
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The invention relates to a method for determining a state of at least one cell of a battery, wherein the battery has a plurality of cells, which are connected in series with each other, the method comprising at least the following steps: a) applying an alternating current to the plurality of cells; b) measuring the alternating voltage produced thereby at at least a first cell and a second cell; c) analyzing a phase position of the measured alternating voltage of each cell; wherein a difference at least between a first phase position of a first alternating voltage measured at the first cell and a second phase position of a second alternating voltage measured at the second cell forms a conclusion about a difference between the states of at least the first cell and the second cell.

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