Electric car and control method thereof

A control method of an electric vehicle, comprising:

• calculating an estimated charge power level from a request torque value obtained when a driver operates a brake and a currently consumed power level discharged from a battery pack to each element of the electric vehicle;
• comparing the estimated charge power level with a maximum rechargeable power level of the battery pack;
• and
• calculating a possible maximum torque value from the maximum rechargeable power level if the estimated charge power level is greater than the maximum rechargeable power level, to allow a motor to charge the battery pack by the possible maximum torque value.

A motor torque control method of an electric vehicle, comprising:

• calculating a request torque value based on acceleration information, braking information, and a vehicle speed;
• determining an allowable maximum torque value with respect to the request torque value based on a residual power quantity and voltage of a battery;
• calculating a corrected torque value by applying a weighted torque value based on an one-side torque output factor to the allowable maximum torque value when one-sided torque output occurs;
• and
• controlling a motor using a final torque value that is calculated by changing the corrected torque value and a current torque value used for motor control based on a preset rate.

An electric vehicle comprising:

• an interface unit including an accelerator sensor to output acceleration information as a driver operates an accelerator, and a brake sensor to output braking information as the driver operates a brake;
• a battery pack to discharge electric power;
• a vehicle control module for calculating an estimated required power level from a request torque value based on the acceleration information and a currently consumed power level discharged from the battery pack, and comparing the estimated required power level with a maximum dischargeable power level of the battery pack;
• and
• a motor to be driven a possible maximum torque value that is calculated from the maximum dischargeable power level by the vehicle control module if the estimated required power level is greater than the maximum dischargeable power level.

An electric vehicle comprising:

• an interface unit to output braking information as a driver operates a brake;
• a battery pack to discharge electric power;
• a vehicle control module for calculating an estimated charge power level from a request torque value based on the braking information and a currently consumed power level discharged from the battery pack, and comparing the estimated charge power level with a maximum rechargeable power level of the battery pack;
• and
• a motor to charge the battery pack by a possible maximum torque value that is calculated from the maximum rechargeable power level by the vehicle control module if the estimated charge power level is greater than the maximum rechargeable power level.