Method and apparatus for charging/discharging electric vehicle

1 . A method for charging/discharging an electric vehicle, the method comprising:

receiving one or more power grid codes and information on a charging/discharging fee rate policy corresponding to each of the one or more power grid codes as a received charging/discharging fee rate policy;

determining a charging/discharging schedule based on the received charging/discharging fee rate policy as a determined charging/discharging schedule; and

performing a charging/discharging for the electric vehicle with a charging station based on the determined charging/discharging schedule;

receiving, by the electric vehicle after the charging/discharging for the electric vehicle has been initiated, a power signal;

measuring, by the electric vehicle, an active power and an operating frequency based on the power signal;

comparing, by the electric vehicle, the measured active power value with an active power parameter to correct the active power value to be applied in subsequent charging/discharging operations; and

comparing, by the electric vehicle, the measured operating frequency value with a frequency parameter to correct the operating frequency value to be applied in subsequent charging/discharging operations.

2 . The method of claim 1 , further comprising:

measuring a current location of the electric vehicle as a measured current location; and

transmitting information on the measured current location to a server via a network,

wherein information on the charging/discharging fee rate policy corresponding to each of the one or more power grid codes mapped to the measured current location is received from the server.

3 . The method of claim 2 , further comprising:

receiving system parameters corresponding to an area code corresponding to the measured current location as received system parameters; and

correcting the received system parameters based on a measurement result for a power signal received from the charging station.

4 . The method of claim 1 , wherein the determining of the charging/discharging schedule based on the charging/discharging fee rate policy comprises:

predicting an available charging/discharging time period as a predicted available charging/discharging time period;

selecting a power grid for the charging/discharging based on the charging/discharging fee rate policy and the predicted available charging/discharging time period as a selected power grid; and

generating a charging/discharging scheduling table by determining a charging/discharging time period based on a charging/discharging fee rate policy corresponding to the selected power grid as a determined charging/discharging time period.

5 . The method of claim 4 , wherein the charging/discharging scheduling table comprises at least one of:

a fee rate field indicating a fee rate for the predicted available charging/discharging time period and the determined charging/discharging time period;

a mode field indicating a time period to be in one of a discharging mode, a discharging start time period, a time period to be in a charging mode, and a charging start time period;

a charging/discharging flag field indicating whether an actual discharging or an actual charging has been performed in a corresponding time period; and

a deposit and withdrawal state field indicating whether a deposit or a withdrawal of a fee to or from a user account has been completed for the discharging or the charging performed in the corresponding time period.

6 . The method of claim 4 , further comprising dynamically updating the charging/discharging fee rate policy based on power consumption statistics information for the predicted available charging/discharging time period and the determined charging/discharging time period of the selected power grid.

7 . The method of claim 1 , wherein the determining the charging/discharging schedule further comprises basing the determining on at least one of a future travel plan set by a user, a current travel path, a travel pattern, and a current battery charged state.

8 . The method of claim 7 , further comprising transmitting vehicle state information to a server via a network,

wherein the travel pattern is analyzed by the server via prior learning based on the vehicle state information, and then, information based on the travel pattern from the server is received by the electric vehicle.

9 . The method of claim 1 , wherein the determining of the charging/discharging schedule further comprises:

determining a discharging time period leading to a maximum discharging fee based on the charging/discharging fee rate policy; and

determining a charging time period leading to a minimum charging fee based on the charging/discharging fee rate policy.

10 . A non-transitory machine-readable storage medium, comprising executable instructions, that, when executed by a processing system including a processor, facilitate performance of operations comprising:

receiving a power grid code and information on a charging/discharging fee rate policy corresponding to each of the power grid code;

determining a charging/discharging schedule based on the charging/discharging fee rate policy;

performing the charging/discharging with a charging station based on the determined charging/discharging schedule;

receiving a power signal;

measuring an active power and an operating frequency based on the power signal;

comparing the measured active power value with an active power parameter to correct the active power value to be applied in subsequent charging/discharging operations; and

comparing the measured operating frequency value with a frequency parameter to correct the operating frequency value to be applied in subsequent charging/discharging operations.

11 . An electric vehicle, comprising:

a battery;

a vehicle communication terminal in communication with an external device via a network;

an electric vehicle charging controller configured to control charging and discharging of the battery; and

a charging/discharging device for charging or discharging the battery in association with a charging station being controlled by the electric vehicle charging controller,

wherein the electric vehicle charging controller is configured to:

receive information on a charging/discharging fee rate policy corresponding to a plurality of power grid codes via the vehicle communication terminal;

determine a charging/discharging schedule based on the charging/discharging fee rate policy

perform the charging/discharging with the charging station based on the charging/discharging schedule;

receive, after the charging/discharging for the electric vehicle has been initiated, a power signal;

measure an active power and an operating frequency based on the power signal;

compare the measured active power value with an active power parameter to correct the active power value to be applied in subsequent charging/discharging operations; and

compare the measured operating frequency value with a frequency parameter to correct the operating frequency value to be applied in subsequent charging/discharging operations.

12 . The electric vehicle of claim 11 , further comprising a positioning system for measuring a current location of the electric vehicle,

wherein the electric vehicle charging controller is configured to:

transmit location information based on the current location determined by the positioning system to a server via the network; and

receive the information on the charging/discharging fee rate policy corresponding to the plurality of power grid codes mapped to the location information from the server.

13 . The electric vehicle of claim 11 , wherein the electric vehicle charging controller is configured to:

predict an available charging/discharging time period as a predicted available charging/discharging time period;

select a power grid for the charging or the discharging based on the charging/discharging fee rate policy and the predicted available charging/discharging time period as a selected power grid; and

generate a charging/discharging scheduling table by determining a charging/discharging time period, as a determined charging/discharging time period, based on a charging/discharging fee rate policy corresponding to the selected power grid.

14 . The electric vehicle of claim 13 , wherein the charging/discharging scheduling table comprises at least one of:

a fee rate field indicating a fee rate for predicted available charging/discharging time period time period and the determined charging/discharging time period;

a mode field indicating a time period to be in a discharging mode, a discharging start time period, a time period to be in a charging mode, and a charging start time period;

a charging/discharging flag field indicating whether an actual discharging or an actual charging has been performed in a corresponding time period; and

a deposit and withdrawal state field indicating whether a deposit or a withdrawal of a fee to or from a user account has been completed for the discharging or the charging performed in the corresponding time period.

15 . The electric vehicle of claim 13 , wherein the charging/discharging fee rate policy is dynamically updated based on power consumption statistics information for the predicted available charging/discharging time period and the determined charging/discharging time period of the selected power grid.

16 . The electric vehicle of claim 11 , wherein the electric vehicle charging controller is configured to determine the charging/discharging schedule further based on at least one of a future travel plan set by a user, a current travel path, a travel pattern, and a current battery charged state.

17 . The electric vehicle of claim 16 , wherein the electric vehicle charging controller is configured to transmit vehicle state information to a server via the vehicle communication terminal,

wherein the travel pattern is analyzed by the server via prior learning based on the vehicle state information as an analyzed travel pattern, and then, information on the analyzed travel pattern is received from the server via the vehicle communication terminal.

18 . The electric vehicle of claim 11 , wherein the electric vehicle charging controller is configured to:

determine the charging/discharging schedule by determining a discharging time period leading to a maximum discharging fee based on the charging/discharging fee rate policy and determining a charging time period leading to a minimum charging fee based on the charging/discharging fee rate policy.