Apparatus for controlling charging of environment-friendly vehicle, system including the same, and method thereof

1. An apparatus for controlling charging of a vehicle, the apparatus comprising:

a high-voltage battery SOC determining unit configured to determine a state of charge (SOC) of a high-voltage battery that is a main power source;

an auxiliary battery SOC determining unit configured to determine an SOC of an auxiliary battery that assists power of the high-voltage battery; and

an auxiliary battery charging control unit configured to, when receiving a request for an operation of an engine for controlling heating from a full automatic temperature control (FATC), perform a control such that the auxiliary battery is charged by using the high-voltage battery,

wherein the auxiliary battery charging control unit performs a control such that, if the SOC of the auxiliary battery is less than a predetermined reference value, the auxiliary battery is charged by using the high-voltage battery.

2. The apparatus of claim 1 , wherein the high-voltage battery SOC determining unit determines the SOC of the high-voltage battery through interaction with a battery management unit.

3. The apparatus of claim 1 , wherein the auxiliary battery SOC determining unit determines the SOC of the auxiliary battery through interaction with an auxiliary battery SOC detecting unit that senses the SOC of the auxiliary battery.

4. The apparatus of claim 1 , wherein the auxiliary battery charging control unit performs a control to charge the auxiliary battery by using the high-voltage battery in one or more of a case in which the SOC of the auxiliary battery is a predetermined reference value or more, a case in which the gear of the vehicle is located in the P-stage, the R-stage, or the N-stage, a case of high-speed driving, a case of high hill-climbing driving, and a case in which a high-voltage part is operated.

5. The apparatus of claim 1 , wherein the auxiliary battery charging control unit performs a control such that, if the SOC of the high-voltage battery is not less than a predetermined reference value when a request for an operation of the engine for controlling heating is received from the full automatic temperature control (FATC), the auxiliary battery is charged by using the SOC of the high-voltage battery.

6. The apparatus of claim 1 , further comprising:

a driving mode determining unit configured to determine a driving mode according to the SOC of the high-voltage battery.

7. A system for controlling charging of a vehicle, the system comprising:

a high-voltage battery that is a main power source of the vehicle;

an auxiliary battery that is an auxiliary power source of the vehicle;

an auxiliary battery SOC detecting unit configured to detect a state of charge (SOC) of the auxiliary battery; and

a vehicle charging control unit configured to, when receiving a request for an operation of an engine for controlling heating from a full automatic temperature control (FATC), perform a control such that the auxiliary battery is charged by using the high-voltage battery,

wherein the vehicle charging control unit performs a control such that, if the SOC of the auxiliary battery is less than a predetermined reference value, the auxiliary battery is charged by using the high-voltage battery.

8. The system of claim 7 , wherein the auxiliary battery SOC detecting unit includes an intelligent battery sensor (IBS).

9. The system of claim 7 , wherein the vehicle charging control unit performs control to charge the auxiliary battery by using the high-voltage battery if the SOC of the high-voltage battery is not less than a predetermined reference value when a request for an operation of the engine for controlling heating is received from the full automatic temperature control (FATC).

10. The system of claim 7 , wherein the vehicle charging control unit is a hybrid control unit (HCU).

11. The system of claim 7 , wherein the vehicle charging control unit includes:

a high-voltage battery SOC determining unit configured to determine an SOC of a high-voltage battery that is a main power source;

an auxiliary battery SOC determining unit configured to determine an SOC of an auxiliary battery that assists power of the high-voltage battery; and

an auxiliary battery charging control unit configured to, when receiving a request for an operation of an engine for controlling heating from the full automatic temperature control (FATC), perform a control such that the auxiliary battery is charged by using the high-voltage battery.

12. A method for controlling charging of a vehicle, the method comprising:

determining, by a vehicle charging control unit, a state of charge (SOC) of a high-voltage battery that is a main power source;

determining, by the vehicle charging control unit, an SOC of an auxiliary battery that assists power of the high-voltage battery;

when receiving a request for an operation of an engine for controlling heating from a full automatic temperature control (FATC), performing, by the vehicle charging control unit, a control such that the auxiliary battery is charged by using the high-voltage battery; and

if the SOC of the auxiliary battery is less than a predetermined reference value, performing, by the vehicle charging control unit, a control to charge the auxiliary battery by using the high-voltage battery.

13. The method of claim 12 , wherein the determining of the SOC of the high-voltage battery includes:

determining the SOC of the high-voltage battery through interaction with a battery management unit.

14. The method of claim 12 , wherein the determining of the SOC of the auxiliary battery includes:

determining the SOC of the auxiliary battery through interaction with the auxiliary battery SOC detecting unit that senses the SOC of the auxiliary battery.

15. The method of claim 12 , further comprising:

performing, by the vehicle charging control unit, a control to charge the auxiliary battery by using the high-voltage battery in one or more of a case in which the SOC of the auxiliary battery is a predetermined reference value or more, a case in which the gear of the vehicle is located in the P-stage, the R-stage, or the N-stage, a case of high-speed driving, a case of high hill-climbing driving, and a case in which a high-voltage part is operated.

16. The method of claim 12 , wherein the performing of the control includes:

performing a control such that, if the SOC of the high-voltage battery is not less than a predetermined reference value when a request for an operation of the engine for controlling heating is received from the full automatic temperature control (FATC), the auxiliary battery is charged by using the SOC of the high-voltage battery.

17. The method of claim 12 , further comprising:

if the SOC of the high-voltage battery is less than a predetermined reference value and the SOC of the auxiliary battery is not less than the predetermined reference value when a request for an operation of the engine for controlling heating is received from the full automatic temperature control (FATC), performing, by the vehicle charging control unit, discharge control of the auxiliary.