Patent · US Expired

Power supply system for a motor vehicle having a low-voltage onboard power supply and having a higher-voltage onboard power supply

US6693368B2 · kind B2 · utility

37Cited by

8References

8Claims

0Family size

Assignee

Bayerische Motoren Werke Aktiengesellschaft · DE

Inventors

Anton Schumann · Munich, DE
Karl Kapfhammer · Germering, DE
Xaver Pfab · Füssen, DE
Alfred Grom · Glonn, DE

Key dates

Filing date	Jun 11, 2001
Grant date	Feb 17, 2004
Priority date	—
Expiry date	Jun 13, 2022

Classification

Technology area (CPC H)Electricity
CPC primaryH02H3/202
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A power supply system for a motor vehicle has a low-voltage onboard power supply and a higher-voltage onboard power supply. Either the minus connection or the plus connection of at least the high-power consuming devices of the higher-voltage onboard power supply is coupled via a central bus line with the corresponding (minus or plus) connection of the low-voltage onboard power supply. The central bus line is provided with a controllable switch. Devices are provided for measuring the voltage of the low-voltage onboard power supply, and/or for measuring the differential current between the current flowing on the plus line and the current flowing on the minus line in the higher-voltage onboard power supply. The controllable switch is opened when the voltage in the low-voltage onboard power supply has exceeded a defined voltage threshold and/or when the differential current has exceeded a defined current threshold.

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