Bidirectional vehicle to load charging communication

1 . An electric vehicle, comprising:

a memory and one or more processors to:

execute a communication between a charger and the electric vehicle to establish a session for bidirectional power delivery between the charger and the electric vehicle via a power cable;

transmit, in the communication and prior to conveyance of power in the session, a data structure comprising a field designated to store a value that is less than zero which indicates that the electric vehicle is configured to discharge power during the bidirectional power delivery; and

cause, subsequent to transmission of the data structure comprising the field with the value that is less than zero and prior to delivery of power in the session to discharge power from the electric vehicle, a configuration of the session for the bidirectional power delivery between the charger and the electric vehicle via the power cable.

2 . The electric vehicle of claim 1 , wherein the field is for a minimum current.

3 . The electric vehicle of claim 1 , wherein the value is less than zero.

4 . The electric vehicle of claim 1 , comprising the one or more processors to:

determine the power cable between the charger and the electric vehicle is secure; and

transmit, subsequent to determination that the power cable is secure, a target value for current from the electric vehicle that is less than zero to cause the charger to initiate a discharge of the electric vehicle.

5 . The electric vehicle of claim 1 , comprising:

receive, subsequent to the configuration of the session for the bidirectional power delivery, an indication that a maximum current for the session is less than zero; and

discharge, subsequent to receipt of the indication that the maximum current is less than zero, the electric vehicle.

6 . The electric vehicle of claim 1 , comprising:

receive, subsequent to the configuration of the session for the bidirectional power delivery, an indication that a maximum current for the charger is less than zero;

provide, subsequent to receipt of the indication that the maximum current is less than zero, to the charger, an indication of a target value for current that is less than zero; and

discharge, responsive to the indication of the target value, power from the electric vehicle.

7 . The electric vehicle of claim 1 , wherein a protocol of the communication comprises a vehicle-to-home protocol.

8 . The electric vehicle of claim 1 , comprising the one or more processors to:

cause execution of a first state of the communication subsequent to detection that the charger is plugged into the electric vehicle, the first state comprising:

determination that a type of protocol of the charger matches the type of protocol of the electric vehicle; and

the configuration of the session for the bidirectional power delivery.

9 . The electric vehicle of claim 1 , comprising the one or more processors to:

cause execution of a first state of the communication subsequent to detection that the charger is plugged into the electric vehicle, the first state comprising determination that a type of protocol of the charger matches the type of protocol of the electric vehicle;

cause execution of a second state of the communication subsequent to the configuration of the session for the bidirectional power delivery, the second state comprising a pre-charge routine; and

initiate, subsequent to the configuration of the session for the bidirectional power delivery, a discharge of the electric vehicle.

10 . The electric vehicle of claim 1 , comprising the one or more processors to:

provide, subsequent to the configuration of the session for the bidirectional power delivery, a target current value to the charger that is less than zero;

cause, responsive to provision of the target current value, an initiation of a discharge of the electric vehicle;

receive, subsequent to the initiation of the discharge of the electric vehicle, an indication of a maximum current value from the charger that is greater than zero; and

charge, responsive to receipt of the indication of the maximum current value, the electric vehicle in the session.

11 . The electric vehicle of claim 1 , wherein transmission of the data structure comprising the field with the value that is less than zero is to trigger the configuration of the session for the bidirectional power delivery.

12 . A method, comprising:

executing, by an electric vehicle comprising one or more processors and memory, a communication between a charger and the electric vehicle to establish a session for bidirectional power delivery between the charger and the electric vehicle via a power cable;

transmitting, by the electric vehicle in the communication and prior to conveyance of power in the session, a data structure comprising a field designated to store a value that is less than zero which indicates that the electric vehicle is configured to discharge power during the bidirectional power delivery; and

causing, by the electric vehicle subsequent to transmission of the data structure comprising the field with the value that is less than zero and prior to delivery of power in the session to discharge power from the electric vehicle, a configuration of the session for the bidirectional power delivery between the charger and the electric vehicle via the power cable.

13 . The method of claim 12 , wherein:

the field is for a minimum current;

the value is less than zero; and

a protocol of the communication comprises a vehicle-to-home protocol.

14 . The method of claim 12 , comprising:

determining, by the electric vehicle, the power cable between the charger and the electric vehicle is secure; and

transmitting, by the electric vehicle subsequent to determining that the power cable is secure, a target value for current from the electric vehicle that is less than zero to cause the charger to initiate a discharge of the electric vehicle.

15 . The method of claim 12 , comprising:

receiving, by the electric vehicle subsequent to the configuration of the session for the bidirectional power delivery, an indication that a maximum current for the session is less than zero; and

discharging, by the electric vehicle subsequent to receipt of the indication that the maximum current is less than zero, the electric vehicle.

16 . The method of claim 12 , comprising:

receiving, by the electric vehicle subsequent to the configuration of the session for the bidirectional power delivery, an indication that a maximum current for the charger is less than zero;

providing, by the electric vehicle, subsequent to receipt of the indication that the maximum current is less than zero, to the charger, an indication of a target value for current that is less than zero; and

discharging, by the electric vehicle responsive to the indication of the target value, power from the electric vehicle.

17 . The method of claim 12 , comprising:

causing, by the electric vehicle, execution of a first state of the communication subsequent to detection that the charger is plugged into the electric vehicle, the first state comprising:

determination that a type of protocol of the charger matches the type of protocol of the electric vehicle; and

the configuration of the session for bidirectional charging.

18 . The method of claim 12 , comprising:

causing, by the electric vehicle, execution of a first state of the communication subsequent to detection that the charger is plugged into the electric vehicle, the first state comprising determination that a type of protocol of the charger matches the type of protocol of the electric vehicle;

causing, by the electric vehicle, execution of a second state of the communication subsequent to the configuration of the session for the bidirectional power delivery, the second state comprising a pre-charge routine; and

initiating, by the electric vehicle subsequent to the configuration of the session for the bidirectional power delivery, a discharge of the electric vehicle.

19 . The method of claim 12 , comprising:

providing, by the electric vehicle, subsequent to the configuration of the session for the bidirectional power delivery, a target current value to the charger that is less than zero;

causing, by the electric vehicle responsive to provision of the target current value that is less than zero, an initiation of a discharge of the electric vehicle;

receiving, by the electric vehicle, subsequent to the initiation of the discharge of the electric vehicle, an indication of a maximum current value from the charger that is greater than zero; and

charging, by the electric vehicle, responsive to receipt of the indication of the maximum current value, the electric vehicle in the session.

20 . A system, comprising:

a memory and one or more processors to:

execute a communication between a charger and an electric vehicle to establish a session for bidirectional power delivery between the charger and the electric vehicle via a power cable;

transmit, in the communication and prior to conveyance of power in the session, a data structure comprising a field designated to store a value that is less than zero which indicates that the electric vehicle is configured to discharge power during the bidirectional power delivery; and

cause, subsequent to transmission of the data structure comprising the field with the value that is less than zero and prior to delivery of power in the session to discharge power from the electric vehicle, a configuration of the session for the bidirectional power delivery between the charger and the electric vehicle via the power cable.

21 . The system of claim 20 , comprising the one or more processors to:

receive, subsequent to configuration of the session for bidirectional power delivery, an indication that a maximum current for the session is less than zero; and

discharge, subsequent to receipt of the indication that the maximum current is less than zero, the electric vehicle.