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

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.

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.