Vehicle control system

1. A method, comprising:

coupling one or more contactors to a contactor drive device to form a contactor system;

coupling a vehicle control unit to the contactor drive device via a first connection and a second connection;

coupling one or more secondary control units to the contactor drive device via the second connection;

configuring a fault diagnostic system to monitor a fault status of the first connection and the second connection;

configuring the vehicle control unit to provide a controlling signal to the contactor system through at least one of the first connection and the second connection according to the fault status; and

configuring the secondary control units to provide a controlling signal to the contactor system through the second connection according to the fault status.

2. The method of claim 1 , wherein configuring the vehicle control unit further comprises providing the controlling signal to the contactor system through the second connection when a fault occurs in the first connection.

3. The method of claim 2 , wherein configuring the vehicle control unit further comprises controlling the one or more contactors to open when a fault occurs in the first connection.

4. The method of claim 1 , wherein configuring the vehicle control unit further comprises cross-checking signals being fed back from the secondary control units to identify whether a fault occurs.

5. The method of claim 1 , wherein configuring the vehicle control unit further comprises comparing a signal being fed back from a secondary control unit and an estimation signal to identify whether a fault occurs.

6. A system, comprising:

a contactor system comprising:

one or more contactors; and

a contactor drive device coupled to the one or more contactors;

a vehicle control unit coupled to the contactor drive device via a first connection and a second connection configured to provide a controlling signal to the contactor system through at least one of the first connection and the second connection to control the one or more contactors;

one or more secondary control units coupled to the contactor drive device via the second connection configured to control the one or more contactors according to the controlling signal from the vehicle control unit; and

a fault diagnostic system configured to identify faults occurring in the first connection and the second connection.

7. The system of claim 6 , wherein the vehicle control unit is configured to provide the controlling signal to the contactor system through the first connection to control the one or more contactors when there is no fault in the first connection and the second connection.

8. The system of claim 6 , wherein the one or more secondary control units are configured to provide the controlling signal to the contactor system through the second connection to control the one or more contactors when a fault occurs in the first connection.

9. The system of claim 6 , wherein the vehicle control unit is configured to provide the controlling signal to the contactor system through the first connection to control the one or more contactors when a fault occurs in the second connection.

10. The system of claim 6 , wherein the secondary control units are configured to control the one or more contactors to open when a fault occurs in the first connection.

11. The system of claim 6 , wherein the vehicle control unit comprises one or more ports coupled to one or more input devices.

12. The system of claim 6 , wherein the contactor drive device comprises a logic unit coupled to the first connection and the second connection.

13. The system of claim 12 , wherein the contactor drive device comprises an amplifying unit coupled to the logic unit.

14. The system of claim 6 , wherein the vehicle control unit is further configured to cross-check signals being fed back from the secondary control unit to identify whether a fault occurs.

15. The system of claim 6 , wherein the vehicle control unit is further configured to compare a signal being fed back from the secondary control unit and an estimation signal to identify whether a fault occurs.

16. A vehicle, comprising:

an energy storage system;

a motor drive system coupled to the energy storage system;

a contactor system comprising:

an energy storage system contactor coupled to the energy storage system;

a motor drive system contactor coupled to the motor drive system; and

a contactor drive device coupled to both the energy storage system contactor and motor drive system contactor;

a vehicle control unit coupled to the contactor drive device via a first connection and a second connection configured to control the contactor system through at least one of the first connection and the second connection;

a secondary control unit coupled to the contactor drive device via the second connection configured to control the contactor system through the second connection; and

a fault diagnostic system configured to identify faults occurring in the first connection and the second connection.

17. The vehicle of claim 16 , wherein the vehicle control unit is configured to control the contactor system through the first connection when there is no fault in the first connection.

18. The vehicle of claim 16 , wherein the secondary control unit is configured to control the contactor system through the second connection when a fault occurs in the first connection.

19. The vehicle of claim 16 , wherein the vehicle control unit is configured to control the contactor system through the first connection when a fault occurs in the second connection.

20. The vehicle of claim 16 , wherein the secondary control unit is configured to control the contactors to open when a fault occurs in the first connection.