Protecting a high voltage battery in a hybrid electric vehicle

摘要

The present invention protects a high voltage battery in a hybrid electric vehicle. More particularly, it makes it possible to prevent a battery from being overcharged when a motor or an inverter system breaks, with the hybrid vehicle traveling. The technique for protecting a high voltage battery in a hybrid electric vehicle illustratively comprises: checking whether a motor functions properly; setting a virtual acceleration pedal value and keeping a present desired shifting map, when the motor breaks; determining a desired shifting stage according to the present desired shifting map based on the virtual acceleration pedal value; and, in certain embodiments, switching or keeping the engine control mode by comparing a value of a predetermined maximum engine speed region with the present engine speed in order to prevent high-speed rotation of the motor.

主权项

1. A method for protecting a high voltage battery in a hybrid electric vehicle, comprising:
checking whether a motor functions properly; in response to the motor not functioning properly, setting a virtual acceleration pedal value while keeping a present desired shifting map; and determining a desired shifting stage according to the present desired shifting map based on the virtual acceleration pedal value.