Patent · US Active

System and method for supplying voltage to electrical loads of a motor vehicle by using a supercap

US8026630B2 · kind B2 · utility

1Cited by

4References

9Claims

0Family size

Assignee

Bayerische Motoren Werke Aktiengesellschaft · DE

Inventors

Andreas Broesse · Munich, DE
Dieter Polenov · Munich, DE
Hartmut Proebstle · Augsburg, DE
Markus Fuchs · Bad Kreuznach, DE
Michael Roesler · Lexington, US
Maximilian Schmidl · Pullach, DE

Key dates

Filing date	Feb 3, 2009
Grant date	Sep 27, 2011
Priority date	—
Expiry date	Apr 25, 2029

Classification

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

Abstract

A system and method for supplying voltage to electrical loads in the onboard electrical system of a motor vehicle are provided. The onboard electrical system consists of at least two onboard electrical system regions. The first onboard electrical system region has an electric generator, a vehicle battery, as well as one or more first electrical loads. The second onboard electrical system region has a double-layer capacitor or a so-called supercap and one or more second electrical loads. Between the two onboard electrical system regions, a blocking device is provided, in particular, a semiconductor diode or a power switch, which permits a current flow from the first onboard electrical system region into the second electrical system region and largely prevents a reverse current flow from the second onboard electrical system region into the first onboard electrical system region. The output voltage of the electric generator is raised and the supercap is charged when a first threshold value of the electric voltage in the second onboard electrical system region is undershot.

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