DC-voltage vehicle electrical system

• US 20050067898A1
• Filed: 09/16/2004
• Published: 03/31/2005
• Est. Priority Date: 09/25/2003
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Gronbach, Roman
• Granted Patent: US 7,513,323 B2
• Time in Patent Office: Days
• US Class Current: 307/10.100
• CPC Class Codes: B60L 58/20 having different nominal voltages
• CPC Class Codes: F02N 11/0866 comprising several power sources, e.g. battery and capacitor or two batteries
• CPC Class Codes: F02N 2011/0888 DC/DC converters
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

A DC-voltage vehicle electrical system for a motor vehicle, having a current source and a user. The DC-voltage vehicle electrical system is preferably developed as a 42V multi-voltage vehicle electrical system. A device for the cyclical interruption of the current is provided in the DC-voltage vehicle electrical system, in order to prevent the formation of arcs during switching and plugging procedures under a load at the DC-voltage vehicle electrical system or to end rapidly the formation of arcs, in a simple manner and without expensive constructive or switching technology measures.

Claims

1. A DC-voltage vehicle electrical system comprising:

a current source;

a user; and

a device situated for a cyclical interruption of a current in the DC-voltage vehicle electrical system.

2. The DC-voltage vehicle electrical system according to claim 1, wherein the system is for a motor vehicle.

3. The DC-voltage vehicle electrical system according to claim 1, wherein the device clocks the current at a constant period/interval ratio.

4. The DC-voltage vehicle electrical system according to claim 3, wherein a period duration of the current amounts to about 10 ms.

5. The DC-voltage vehicle electrical system according to claim 1, wherein the system is a multi-voltage vehicle electrical system having at least one first voltage level and a second voltage level.

6. The DC-voltage vehicle electrical system according to claim 5, wherein the voltage levels of the system are connected to at least one DC/DC converter.

7. The DC-voltage vehicle electrical system according to claim 6, wherein the device for the cyclical interruption of the current is formed by a control device of the DC/DC converter.

8. The DC-voltage vehicle electrical system according to claim 1, wherein the device includes a smart power switch.

9. The DC-voltage vehicle electrical system according to claim 1, further comprising a feed arrangement for an external energy supply by an external loading terminal point.

10. The DC-voltage vehicle electrical system according to claim 9, wherein the external loading terminal point is capable of connecting to the system via a DC/DC converter.

11. The DC-voltage vehicle electrical system according to claim 1, further comprising at least two DC/DC converters connected in parallel, which are capable of being controlled in an upwards operation and a downwards operation.