Method and device for controlling a connection between a battery and a socket of an electric motor vehicle

1. A device for controlling a connection, in a vehicle with an electric motor, between an electrical socket of said vehicle and a battery of said vehicle, said electrical socket being intended to interact with an electrical connector so as to charge said battery, and said battery being intended to supply power to the electric motor of said vehicle, wherein:

the device for controlling a connection comprises a first contactor arranged between a first terminal of the battery and a first terminal of the electrical socket, a second contactor arranged between a second terminal of the battery and a second terminal of the electrical socket, a first computer and a second computer,

the first contactor comprises a first control terminal and a second control terminal, and the second contactor comprises a first control terminal and a second control terminal,

the first computer comprises a high-side switch, arranged between a power supply line and the first control terminal of the first contactor, and a low-side switch arranged between the second control terminal of the second contactor and a ground line, and

the second computer comprises a low-side switch arranged between the second control terminal of the first contactor and the ground line, and a high-side switch arranged between the power supply line and the first control terminal of the second contactor.

2. The device for controlling a connection as claimed in claim 1 , wherein the first computer and the second computer are identical.

3. The device for controlling a connection as claimed in claim 1 , wherein the first control terminal of the first contactor and the first control terminal of the second contactor are connected to the power supply line by means of respective high-side resistive components, and the second control terminal of the first contactor and the second control terminal of the second contactor are connected to the ground line by means of respective low-side resistive components.

4. The device for controlling a connection as claimed in claim 3 , wherein the first computer comprises a processing circuit configured:

to measure a voltage at the first control terminal of the first contactor and to measure a voltage at the second control terminal of the second contactor, and

to diagnose the first contactor and the second contactor according to the voltage measurements.

5. The device for controlling a connection as claimed in claim 3 , wherein the second computer comprises a processing circuit configured:

to measure a voltage at the second control terminal of the first contactor and to measure a voltage at the first control terminal of the second contactor, and

to diagnose the first contactor and the second contactor according to the voltage measurements.

6. The device for controlling a connection as claimed in claim 1 , wherein the first computer and the second computer are connected by means of a communication bus so as to exchange diagnostic information and/or synchronization information, said first computer and said second computer being configured to control each high-side switch and each low-side switch taking into account the diagnostic information and/or the synchronization information received over said communication bus.

7. A vehicle comprising an electric motor, a battery intended to supply power to said electric motor and an electrical socket intended to interact with an electrical connector so as to charge said battery, further comprising a device for controlling a connection as claimed in claim 1 , arranged between said electrical socket and said battery of the motor vehicle.

8. A method for controlling a connection implemented by a device for controlling a connection as claimed in claim 1 , the method comprising, when each high-side switch and each low-side switch is in the open state, steps of:

the first contactor being diagnosed by the first computer, the high-side switch of the first computer being controlled so as to enter the closed state by the first computer only if no problem is detected at the first contactor by said first computer, and

the second contactor being diagnosed by the first computer, the low-side switch of the first computer being controlled so as to enter the closed state by the first computer only if no problem is detected at the second contactor by said first computer.

9. The method for controlling a connection as claimed in claim 8 , wherein:

the high-side switch of the first computer is controlled so as to be in the closed state by the first computer only if no problem is detected on the first contactor and/or on the second contactor by the second computer, and

the low-side switch of the first computer is controlled so as to enter the closed state by the first computer only if no problem is detected at the first contactor and/or at the second contactor by the second computer.

10. The method for controlling a connection as claimed in claim 8 , comprising, after the first computer has controlled the low-side switch so as to enter the closed state and before controlling the high-side switch so as to enter the closed state, a step of the first contactor being diagnosed by said first computer, the high-side switch of the first computer being controlled so as to enter the closed state by the first computer only if no problem is detected at the first contactor by said first computer.

11. The method for controlling a connection as claimed in claim 8 , wherein the high-side switch of the first computer is controlled so as to enter the closed state by the first computer only if said first computer has received, from the second computer, synchronization information indicating that the low-side switch of said second computer has been controlled so as to enter the closed state.

12. The device for controlling a connection as claimed in claim 2 , wherein the first control terminal of the first contactor and the first control terminal of the second contactor are connected to the power supply line by means of respective high-side resistive components, and the second control terminal of the first contactor and the second control terminal of the second contactor are connected to the ground line by means of respective low-side resistive components.

13. The device for controlling a connection as claimed in claim 4 , wherein the second computer comprises a processing circuit configured:

to measure a voltage at the second control terminal of the first contactor and to measure a voltage at the first control terminal of the second contactor, and

to diagnose the first contactor and the second contactor according to the voltage measurements.

14. The device for controlling a connection as claimed in claim 2 , wherein the first computer and the second computer are connected by means of a communication bus so as to exchange diagnostic information and/or synchronization information, said first computer and said second computer being configured to control each high-side switch and each low-side switch taking into account the diagnostic information and/or the synchronization information received over said communication bus.

15. The device for controlling a connection as claimed in claim 3 , wherein the first computer and the second computer are connected by means of a communication bus so as to exchange diagnostic information and/or synchronization information, said first computer and said second computer being configured to control each high-side switch and each low-side switch taking into account the diagnostic information and/or the synchronization information received over said communication bus.

16. The device for controlling a connection as claimed in claim 4 , wherein the first computer and the second computer are connected by means of a communication bus so as to exchange diagnostic information and/or synchronization information, said first computer and said second computer being configured to control each high-side switch and each low-side switch taking into account the diagnostic information and/or the synchronization information received over said communication bus.

17. The device for controlling a connection as claimed in claim 5 , wherein the first computer and the second computer are connected by means of a communication bus so as to exchange diagnostic information and/or synchronization information, said first computer and said second computer being configured to control each high-side switch and each low-side switch taking into account the diagnostic information and/or the synchronization information received over said communication bus.

18. A vehicle comprising an electric motor, a battery intended to supply power to said electric motor and an electrical socket intended to interact with an electrical connector so as to charge said battery, further comprising a device for controlling a connection as claimed in claim 2 , arranged between said electrical socket and said battery of the motor vehicle.

19. A vehicle comprising an electric motor, a battery intended to supply power to said electric motor and an electrical socket intended to interact with an electrical connector so as to charge said battery, further comprising a device for controlling a connection as claimed in claim 3 , arranged between said electrical socket and said battery of the motor vehicle.

20. A vehicle comprising an electric motor, a battery intended to supply power to said electric motor and an electrical socket intended to interact with an electrical connector so as to charge said battery, further comprising a device for controlling a connection as claimed in claim 4 , arranged between said electrical socket and said battery of the motor vehicle.