Method and device for stabilizing an on-board electrical system of a vehicle electrical system

• US 20040239184A1
• Filed: 07/23/2004
• Published: 12/02/2004
• Est. Priority Date: 08/30/2001
• Status: Active Grant

• Current Assignee: Volkswagen AG
• Original Assignee: Volkswagen AG
• Inventors: Wahnschaffe, Nikolaus, Brosig, Stefan, Manz, Holger
• Granted Patent: US 7,656,056 B2
• Time in Patent Office: Days
• US Class Current: 307/10.1
• CPC Class Codes: B60R 16/03 for supply of electrical power to vehicle subsystems or for circuit arrangements for charging batteries H02J7/00
• CPC Class Codes: H02J 2310/46 for ICE-powered road vehicles
• CPC Class Codes: H02J 7/0047 with monitoring or indicating devices or circuits
• CPC Class Codes: H02J 7/14 for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

A vehicle electrical system includes at least one battery, at least one fan and a device for detecting a critical state in the vehicle electrical system. The fan is activated when a critical state of the vehicle electrical system is detected. In this context, use is made of the fan'"'"'s ability to store mechanical energy in the form of inertias. The fan operates in a regenerative manner and electrically feeds the mechanically stored energy back into the on-board electrical system.

Claims

1. to 9. (Canceled).

10. A method for stabilizing an on-board electrical system of a vehicle electrical system, including at least one battery, at least one load driven by an electric motor and a device configured to detect a state that is critical to the on-board electrical system, comprising:

activating the load driven by the electric motor when a critical state of the on-board electrical system is detected.

11. The method as recited in claim 10, further comprising running up the load as a function of the detected critical state of the on-board electrical system.

12. The method as recited in claim 10, further comprising checking a functionality of the battery by the device configured to detect a critical state of the on-board electrical system.

13. The method as recited in claim 10, further comprising analyzing a ripple content of an on-board electrical voltage.

14. The method as recited in claim 10, further comprising switching off comfort loads.

15. The method as recited in claim 10, wherein the load includes a fan.

16. The method as recited in claim 15, wherein the fan includes a combustion-engine fan.

17. A device for stabilizing an on-board electrical system of a vehicle electrical system, comprising:

at least one battery;

at least one load driven by an electric motor; and

a device configured to detect a critical state of the on-board electrical system, the device configured to switch in the load driven by the electric motor.

18. The device as recited in claim 17, wherein the load includes a fan.

19. The device as recited in claim 18, wherein the fan includes a combustion-engine fan.

20. The device as recited in claim 17, wherein the device configured to detect the critical state of the on-board electrical system is configured to check a functionality of the battery.

21. The device as recited in claim 17, wherein the device is configured to detect and analyze a ripple content of an on-board electrical voltage.

22. A device for stabilizing an on-board electrical system of a vehicle electrical system, comprising:

at least one battery;

at least one load driven by an electric motor; and

means for detecting a critical state of the on-board electrical system and for switching in the load driven by the electric motor.