Regenerative braking apparatus for vehicle and method using the same

A method of controlling regenerative braking of a vehicle, the method comprising:

• calculating, by a vehicle controller, a total braking amount based on driving state information;
• calculating, by the vehicle controller, a regenerative braking possible amount based on a generatable power of a drive motor and a chargeable power of a battery;
• determining, by the vehicle controller, whether the regenerative braking possible amount is greater than the total braking amount;
• performing, by the vehicle controller, the regenerative braking when the regenerative braking possible amount is greater than the total braking amount;
• and
• preparing, by the vehicle controller, a hydraulic pressure braking based on a regenerative braking amount based on the regenerative braking possible amount and the regenerative braking,
• wherein the preparing the hydraulic pressure braking includes:
• calculating a calculation value based on the regenerative braking possible amount and the regenerative braking amount;
• determining whether the calculation value is less than a reference value;
• supplying a hydraulic pressure to a brake cylinder connected with a brake pad when the calculation value is less than the reference value, and
• wherein in the preparing the hydraulic pressure braking, the hydraulic pressure is supplied to the brake cylinder connected with the brake pad until the brake pad and a brake disk are a state of a kiss point.