Forced charging method for PHEV vehicles using motor and HSG

摘要

A method of forcibly charging a high-voltage battery using a motor and a Hybrid Starter Generator (HSG) is provided. The method forcibly charges the high-voltage battery with maximum charging power using the motor and the HSG simultaneously. Particularly, the method includes calculating maximum chargeable power for the high-voltage battery using three dimensional (3D) maximum charging power maps of the motor and the HSG and adjusting maximum charging power using energy integration during forced charging using the motor and the HSG simultaneously. Additionally, excessive temperature prevention logics are applied for protecting the motor and the HSG from an excessive temperature in a forced charging mode.

主权项

1. A method of forcibly charging a high-voltage battery using a motor and a Hybrid Starter Generator (HSG), comprising:
sensing, by a controller, speeds and temperatures of the motor and the HSG; calculating, by the controller, maximum chargeable power using three dimensional (3D) maximum charging power maps based on speeds, and torque (power), and torque applying times of the motor and the HSG;
forcibly charging, by the controller, the high-voltage battery with the maximum chargeable power; adjusting, by the controller, maximum charging power using energy integration during the forced charging; executing, by the controller, a first excessive temperature prevention logic for the motor and the HSG to continuously perform the forced charging by one of the motor and the HSG, during the forced charging of the high-voltage battery using the motor and the HSG simultaneously; and executing, by the controller, a second excessive temperature prevention logic for adjusting current temperatures of the motor and the HSG below an operating power limiting temperature to maximize a time of an Electric Vehicle (EV) driving mode in which a vehicle is driven through motor-only operation, in response to the forced charging of the high voltage battery being completed.