Patent · US Active

Protective device and method for shutting down at least one battery cell in a battery system in case of an electrical short circuit, and also motor vehicle, battery system, and battery cell having the protective device

US11303139B2 · kind B2 · utility

5Cited by

0References

8Claims

0Family size

Assignee

AUDI AG · DE

Inventors

Michael Hinterberger · Großmehring, DE
Berthold Hellenthal · Schwanstetten, DE
Peter Pilgram · Leibnizweg, DE

Key dates

Filing date	Feb 5, 2020
Grant date	Apr 12, 2022
Priority date	—
Expiry date	Jul 2, 2040

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/70
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A protective device for shutting down at least one battery cell in a battery system of a motor vehicle in case of an electrical short circuit. The protective device is configured to conduct an electric current, which flows through the at least one battery cell, through a measurement element, in which the current generates an electrical measurement voltage in dependence on its amperage and/or its amperage gradient. The measurement element is coupled to an analog monitoring circuit, in which a comparison unit is configured to trigger a triggering signal for the case that the amperage rises at least by a predetermined delta value within a predetermined duration, and a switching unit is configured to receive the triggering signal and to interrupt the current upon receiving the triggering signal by switching at least one switching element.

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