System and method for controlling charging/discharging of vehicle

1 . A system for controlling charging/discharging of a vehicle, the system comprising:

a vehicle battery;

an external controller connected to the vehicle and configured to control an exchange of power;

a switch configured to connect/disconnect the vehicle battery to/from the external controller; and

a charging/discharging controller configured to:

control the vehicle battery and the external controller to be connected to each other by closing the switch in response to determining that the vehicle is started or a charging door is opened;

determine whether the vehicle battery is connected to a charger or to the external controller after the power is activated;

open the switch in response to determining that the vehicle battery is connected to the charger; and

maintain the switch in a closed state in response to determining that the vehicle battery is connected to the external controller for discharging the vehicle battery.

2 . The system according to claim 1 , wherein the charging/discharging controller is configured to activate the power of the charging/discharging controller in response to determining that the vehicle is started or the charging door is opened.

3 . The system according to claim 1 , wherein the vehicle battery and the external controller are connected through a charging inlet of the vehicle.

4 . The system according to claim 3 , wherein the charging inlet of the vehicle is configured to use a pin that is unused among a plurality of pins of a charging port in an event a charging cable is connected to charge the vehicle.

5 . The system according to claim 1 , wherein the charging/discharging controller comprises a microcontroller unit (MCU) and is configured to control the vehicle battery and the external controller to be connected to each other by closing the switch using a signal from the MCU.

6 . The system according to claim 1 , wherein the charging/discharging controller is configured to perform control such that only power of systems related to charging/discharging is activated.

7 . The system according to claim 1 , wherein the charging/discharging controller is configured to open the switch in response to the external controller being turned off and switch to a power saving mode in which a cable is removable.

8 . The system according to claim 1 , wherein the external controller is configured to set a termination command or a minimum state of charge (SOC) of the vehicle battery using a mobile device.

9 . A method for controlling charging/discharging of a vehicle, the method comprising:

activating power of a charging/discharging controller upon recognition of a starting of the vehicle or an opening of a charging door;

closing a switch connected between a vehicle battery and an external controller by the charging/discharging controller; and

activating power of the external controller by supplying power of the vehicle battery to the external controller,

wherein closing the switch comprises:

determining, by the charging/discharging controller, whether the vehicle battery is connected to a charger or to the external controller;

opening the switch in response to determining that the vehicle battery is connected to the charger; and

maintaining the switch in a closed state in response to determining that the vehicle battery is connected to the external controller for discharging the vehicle battery.

10 . The method according to claim 9 , wherein activating the power of the external controller comprises supplying the power of the vehicle battery to the external controller through a pin that is unused among a plurality of pins of a charging port in response to a charging cable being connected to charge the vehicle.

11 . The method according to claim 9 , wherein closing the switch comprises controlling, by the charging/discharging controller, the vehicle battery and the external controller to be connected to each other by closing the switch using a signal of a microcontroller unit.

12 . The method according to claim 9 , further comprising performing control, by the charging/discharging controller, such that only power of systems related to charging/discharging is activated.

13 . The method according to claim 9 , further comprising setting a termination command or a minimum state of charge (SOC) of the vehicle battery by the external controller using a mobile device.

14 . A vehicle comprising:

a vehicle body;

a vehicle battery disposed within the vehicle body;

a charging inlet configured to be coupled to an external controller;

a switch configured to connect/disconnect the vehicle battery to/from the external controller; and

a charging/discharging controller configured to:

control a connection of the vehicle battery and the charging inlet by closing the switch in response to determining that the vehicle is started or a charging door is opened;

determine whether the vehicle battery is connected to a charger or to the external controller after power is activated;

open the switch in response to determining that the vehicle battery is connected to the charger; and

maintain the switch in a closed state in response to determining that the vehicle battery is connected to the external controller for discharging the vehicle battery.

15 . The vehicle according to claim 14 , wherein the charging inlet of the vehicle is configured to use a pin that is unused among a plurality of pins of a charging port in an event a charging cable is connected to charge the vehicle.

16 . The vehicle according to claim 14 , wherein the charging/discharging controller comprises a microcontroller unit (MCU) and is configured to control the vehicle battery and the external controller to be connected to each other through the charging inlet by closing the switch using a signal from the MCU.

17 . The vehicle according to claim 16 , wherein the MCU is configured to receive a termination command or a minimum state of charge (SOC) of the vehicle battery from an audio video navigation telematics of the vehicle.

18 . The vehicle according to claim 14 , wherein the external controller is configured to set a termination command or a minimum state of charge (SOC) of the vehicle battery using a mobile device.

19 . The vehicle according to claim 14 , wherein the charging/discharging controller is further configured to open the switch in response to the external controller being turned off and switch to a power saving mode.