An electric vehicle comprising: a charging socket ; a battery configured to be charged with a predetermined voltage; a converter configured to convert an input voltage to an output voltage, and configured to boost, when the input voltage received through the charging socket is lower than the predetermined voltage, the input voltage to the predetermined voltage, the converter further configured to transfer the predetermined voltage to the battery so that the battery is charged with power having the predetermined voltage; and a switch device (1302; 1502), including a plurality of switches, disposed between the charging socket and an input side of the converter , and configured to open or close a path through which the input voltage is transferred to the converter and the battery , wherein when the input voltage received through the charging socket is equal to the predetermined voltage, the input voltage is directly transferred to the battery , without converting it, to charge the battery ; wherein the converter includes a motor and an inverter of the electric vehicle , and the motor and the inverter operate as the converter ; wherein the switch device (1302; 1502) includes a first switch (R1), a second switch (R2), and a third switch (R3); the first switch (R1) and the third switch (R3) are turned on and the second switch (R2) is turned off when the input volt-age equal to the predetermined voltage is received so that the input voltage is transferred to the battery ; and the second switch (R2) and the third switch (R3) are turned on and the first switch (R1) is turned off when the input voltage lower than the predetermined voltage is received so that the input voltage is boosted by the converter and then transferred to the battery ; wherein the coils of the motor are a first, second and third inductor (L1, L2, L3) which at a respective first end are connected together and to the second switch (R2) and at a respective second end are connected to the inverter . a charging socket ; a battery configured to be charged with a predetermined voltage; a converter configured to convert an input voltage to an output voltage, and configured to boost, when the input voltage received through the charging socket is lower than the predetermined voltage, the input voltage to the predetermined voltage, the converter further configured to transfer the predetermined voltage to the battery so that the battery is charged with power having the predetermined voltage; and a switch device (1302; 1502), including a plurality of switches, disposed between the charging socket and an input side of the converter , and configured to open or close a path through which the input voltage is transferred to the converter and the battery , wherein when the input voltage received through the charging socket is equal to the predetermined voltage, the input voltage is directly transferred to the battery , without converting it, to charge the battery ; wherein the converter includes a motor and an inverter of the electric vehicle , and the motor and the inverter operate as the converter ; wherein the switch device (1302; 1502) includes a first switch (R1), a second switch (R2), and a third switch (R3); the first switch (R1) and the third switch (R3) are turned on and the second switch (R2) is turned off when the input volt-age equal to the predetermined voltage is received so that the input voltage is transferred to the battery ; and the second switch (R2) and the third switch (R3) are turned on and the first switch (R1) is turned off when the input voltage lower than the predetermined voltage is received so that the input voltage is boosted by the converter and then transferred to the battery ; wherein the coils of the motor are a first, second and third inductor (L1, L2, L3) which at a respective first end are connected together and to the second switch (R2) and at a respective second end are connected to the inverter . <EOS>