Patent ID: 6989644
Filing Date: 2006-01-24
Classification: B60L,H02M

Abstract:
1. A regenerative braking method for an electric vehicle, comprising: determining whether a brake of the electric vehicle is operating; calculating a regeneration current based on a brake operation value if it is determined that the brake is operating; determining whether the regeneration current is greater than a battery current limit; calculating a surplus regeneration power if it is determined that the regeneration current is greater than the battery current limit; and controlling an air conditioning system to consume a portion or all of the surplus regeneration power, wherein the controlling the air conditioning system comprises: calculating consumable power of an air heating device of the air conditioning system that can be currently consumed by the air heating device; determining whether the surplus regeneration power is less than the calculated consumable power of the air heating device; and controlling the air heating device to consume all of the surplus regeneration power, if it is determined that the surplus regeneration power is less than the consumable power of the air heating device; and wherein the consumable power of an air heating device is calculated based on a current duty of the air heating device and a rated power of the air heating device.