Patent · US Active

Method for detecting a fault state of a battery cell, detection device, and motor vehicle

US11888126B2 · kind B2 · utility

0Cited by

0References

10Claims

0Family size

Assignee

AUDI AG · DE

Inventors

Sebastian Koch · Bohmte, DE
Christian Roettinger · Ingolstadt, DE
Markus Goebel · Nassenfels, DE

Key dates

Filing date	Apr 15, 2022
Grant date	Jan 30, 2024
Priority date	—
Expiry date	Jun 2, 2042

Classification

Technology area (CPC H)Electricity
CPC primaryH01M2220/20
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method for detecting a fault state of at least one battery cell of a battery having multiple battery cells. A cell voltage of a respective battery cell of the multiple battery cells is registered at a measurement time and a comparison value is determined as a function of at least one of the cell voltages and is compared to a provided first reference value. The fault state is detected as a function of a result of the comparison. A scatter value is determined, which represents a scatter of at least part of the cell voltages registered at the specific measurement time, and the fault state is determined as a function of the scatter value.

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