METHOD AND APPARATUS FOR CONTROL OF A HYBRID ELECTRIC VEHICLE TO ACHIEVE A TARGET LIFE OBJECTIVE FOR AN ENERGY STORAGE DEVICE

摘要

A method for determining a preferred operating gradient for use in attaining a life objective for an electrical energy storage device in a hybrid vehicle is disclosed. A present state-of-life of the electrical energy storage device is provided and a life target for the electrical energy storage device is established as a predetermined limit in a predetermined metric at a predetermined state-of-life of the electrical energy storage device. A state-of- life gradient is then determined with respect to the predetermined metric which converges the state-of-life of the electrical energy storage device to the life target.