SYSTEM AND METHOD FOR HIGH-VOLTAGE DISCONNECTION IN A VEHICLE

• US 20130307326A1
• Filed: 12/13/2011
• Published: 11/21/2013
• Est. Priority Date: 01/25/2011
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Fassnacht, Jochen
• Granted Patent: US 9,475,437 B2
• Time in Patent Office: Days
• US Class Current: 307/9.1
• CPC Class Codes: B60L 2210/10 DC to DC converters
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2240/34 Cabin temperature
• CPC Class Codes: B60L 3/0069 relating to the isolation, e.g. ground fault or leak current
• CPC Class Codes: B60L 3/04 Cutting off the power supply under fault conditions protective devices and circuit arrangements in general H01H; H02H
• CPC Class Codes: B60L 50/51 characterised by AC-motors
• CPC Class Codes: B60L 50/66 Arrangements of batteries
• CPC Class Codes: B60L 53/11 DC charging controlled by the charging station, e.g. mode 4
• CPC Class Codes: B60L 53/65 involving identification of vehicles or their battery types
• CPC Class Codes: B60L 58/20 having different nominal voltages
• CPC Class Codes: B60R 16/02 electric constitutive elements
• CPC Class Codes: B60R 2021/01252 Devices other than bags
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles
• CPC Class Codes: Y02T 90/167 Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: Y04S 30/14 Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Abstract

The invention relates to a system (2) for high-voltage disconnection in a vehicle having at least two high-voltage carrying components (10, 12a, b, 14, 16, 18, 20) , each component having a housing (11), at least one connecting element for a data bus (4) and at least one connecting element for a high-voltage supply (9), each high-voltage carrying component (10, 12a, b, 14, 16, 18, 20) being designed to detect locally an event which is intended to trigger a high-voltage disconnection, wherein said system is characterized in that each high-voltage carrying component (10, 12a, b, 14, 16, 18, 20) is designed locally to trigger a high-voltage disconnection of the high-voltage carrying component (10, 12a, b, 14, 16, 18, 20) as a reaction to the detection of the event. As an advantageous development, access to components having a hazardous voltage is possible only after the connecting element of the data bus has been removed, the removal or disruption of which leads to rapid disconnection of the electric system.

Claims

1. A system (2) for high-voltage disconnection in a vehicle;

having at least two high-voltage-carrying components (10, 12a, b, 14, 16, 18, 20);

each component having

a housing (11);

at least one connection element for a data bus (4); and

at least one connection element for a high-voltage supply (9);

wherein each high-voltage-carrying component (10, 12a, b, 14, 16, 18, 20) is designed to locally detect an event, which event is intended to trigger high-voltage disconnection;

characterized in that

each high-voltage-carrying component (10, 12a, b, 14, 16, 18, 20) is designed locally to trigger high-voltage disconnection of at least one high-voltage-carrying component (10, 12a, b, 14, 16, 18, 20) in response to the detection of the event.

2. The system as claimed in claim 1, each high-voltage-carrying component (10, 12a, b, 14, 16, 18, 20) having a detector element (8) for locally detecting the event.

3. The system as claimed in claim 1, wherein the high-voltage-carrying components (10, 12a, b, 14, 16, 18, 20) are coupled such that they can communicate using the data bus (4), in particular CANBUS, LIN and/or FLEXRAY.

4. The system as claimed in claim 1, wherein the event is an event from the group comprising disconnecting the connection element of the data bus from the high-voltage-carrying component, breakdown of or disturbance in the data bus, interruption of a local pilot line/HV interlock line when opening the housing of the high-voltage-carrying component, and triggering of a local detector element (8) of the high-voltage-carrying component.

5. The system as claimed in claim 1,

wherein at least one high-voltage-carrying component (10, 12a, b, 14, 16, 18, 20) is formed in such a way

that the housing (11) can only be opened after the connection element of the data bus (4) is disconnected from the high-voltage-carrying component (10, 12a, b, 14, 16, 18, 20);

and/or that the connection element of a high-voltage line (9) can only be disconnected after the connection element of the data bus (4) is disconnected from the high-voltage-carrying component (10, 12a, b, 14, 16, 18, 20); and

/or

electric-shock protection of the high-voltage-carrying components (10, 12a, b, 14, 16, 18, 20) can only be reduced after the connection element of the data bus (4) is disconnected from the high-voltage-carrying component (10, 12a, b, 14, 16, 18, 20).

6. The system as claimed in claim 1,

wherein the detector element (8) is a constituent part of the connection element of the data bus (4);

and

wherein each high-voltage-carrying component (10, 12a, b, 14, 16, 18, 20) triggers the response of the system by communication using the data bus (5) after detection of the event.

7. The system as claimed claim 1,

wherein the high-voltage-carrying component (10, 12a, b, 14, 16, 18, 20) is a component from the group comprising pulse-controlled inverter (12a, b), battery (16), electrical machine (18), charging device (20), on-board electrical system distributor (10) and DC voltage converter (14);

and/or

wherein disconnection of the high-voltage involves deactivating feeding sources, deactivating electrical drives and discharging energy storage devices.

8. The system as claimed in claim 1,

wherein the event is disconnection of a connection element of the data bus (4) from the high-voltage-carrying component;

and

wherein at least one high-voltage-carrying component (10, 12a, b, 14, 16, 18, 20) is formed in such a way that electric-shock protection of the high-voltage-carrying components (10, 12a, b, 14, 16, 18, 20) can only be reduced after the connection element of the data bus (4) is disconnected from the high-voltage-carrying component (10, 12a, b, 14, 16, 18, 20).

9. A vehicle having a system (2) as claimed in claim 1.

11. The system as claimed in claim 3, wherein the the data bus (4) is at least one of CANBUS, LIN and FLEXRAY.

12. The system as claimed in claim 1, wherein at least one high-voltage-carrying component (10, 12a, b, 14, 16, 18, 20) is formed in such a way that the housing (11) can only be opened after the connection element of the data bus (4) is disconnected from the high-voltage-carrying component (10, 12a, b, 14, 16, 18, 20).

13. The system as claimed in claim 1, wherein at least one high-voltage-carrying component (10, 12a, b, 14, 16, 18, 20) is formed in such a way that the connection element of a high-voltage line (9) can only be disconnected after the connection element of the data bus (4) is disconnected from the high-voltage-carrying component (10, 12a, b, 14, 16, 18, 20).

14. The system as claimed in claim 1, wherein at least one high-voltage-carrying component (10, 12a, b, 14, 16, 18, 20) is formed in such a way electric-shock protection of the high-voltage-carrying components (10, 12a, b, 14, 16, 18, 20) can only be reduced after the connection element of the data bus (4) is disconnected from the high-voltage-carrying component (10, 12a, b, 14, 16, 18, 20).

15. The system as claimed in claim 1, wherein the detector element (8) is a constituent part of the connection element of the data bus (4).

16. The system as claimed in claim 1, wherein each high-voltage-carrying component (10, 12a, b, 14, 16, 18, 20) triggers the response of the system by communication using the data bus (5) after detection of the event.

17. The system as claimed in claim 1, wherein the high-voltage-carrying component (10, 12a, b, 14, 16, 18, 20) is a component from the group comprising pulse-controlled inverter (12a, b), battery (16), electrical machine (18), charging device (20), on-board electrical system distributor (10) and DC voltage converter (14).

18. The system as claimed in claim 1, wherein disconnection of the high-voltage involves deactivating feeding sources, deactivating electrical drives and discharging energy storage devices.

19. The vehicle as claimed in claim 9, wherein the vehicle is an electric vehicle.

20. The vehicle as claimed in claim 9, wherein the vehicle is a hybrid vehicle.

10. A method (30) for high-voltage disconnection in a vehicle having at least one high-voltage-carrying component, the method comprising:

locally detecting (32) an event in a high-voltage-carrying component, which event is intended to trigger high-voltage disconnection, wherein the event is disconnection of a connection element of the data bus (4) from the high-voltage-carrying component; and

locally triggering (34) high-voltage disconnection of the high-voltage-carrying component in the vehicle, wherein electric-shock protection of the high-voltage-carrying component (10, 12a, b, 14, 16, 18, 20) can only be reduced after the connection element of the data bus (4) is disconnected from the high-voltage-carrying component (10, 12a, b, 14, 16, 18, 20).