Method and system for charging battery for hybrid electric vehicle

摘要

Disclosed herein is a method and system for charging a battery of a hybrid electric vehicle driven with power of an engine and/or a motor, the method including detecting an accelerator pedal position by an accelerator position detector, detecting a brake pedal position by a brake position detector, determining, by a controller, when the vehicle is coasting based on manipulation of the accelerator pedal and the brake pedal; determining when a state of charge of the battery is a charged state having a value equal to or smaller than a set value; and maintaining the engine in a driving state and rotating the driving motor with engine power to charge the battery with generated power of the driving motor when the state of charge of the battery is the charged state having the value equal to or smaller than the set value and the hybrid electric vehicle is coasting.

主权项

1. A method of charging a battery for supplying driving power to a vehicle operated with power of an engine and a driving motor, the method comprising:
detecting, by an accelerator position detector, a position of an accelerator pedal; detecting, by a brake position detector, a position of a brake pedal; and charging, by a controller, the battery based on a plurality of signals from the accelerator position detector and the brake position detector and a state of charge of the battery; determining, by the controller, when the vehicle is coasting in response to a manipulation of the accelerator pedal and the brake pedal; determining, by the controller, when the state of charge of the battery is a charged state having a value equal to or smaller than a set value; maintaining, by the controller, the engine in a driving state and rotating the driving motor with power of the engine to charge the battery with power generated by the driving motor, when the state of charge of the battery is the charged state having the value equal to or smaller than the set value and the vehicle is coasting; and controlling, by the controller, a torque of the engine to a set torque by controlling the engine while maintaining revolutions per minute of the engine within a set range of revolutions per minute, wherein charging the battery comprises:
rotating, by the controller, a starting/generating motor configured to generate power using the engine power to charge the battery with the generated power when the state of charge of the battery is the charged state having the value equal to or smaller than the set value and the vehicle is coasting; andwhile charging the battery using the starting/generating motor, transferring, by the controller, a torque of a plurality of vehicle wheels to the driving motor to generate power and charge the battery with the generated power when the state of charge of the battery is the charged state having the value equal to or smaller than the set value and the vehicle is coasting.