HYBRID VEHICLE AND METHOD OF OPERATION

摘要

Some vehicle maneuvers in a hybrid electric vehicle require a high discharge current from the battery. The capacity of a battery to supply a large discharge current depends on, among other things, the recent charge and discharge history. When the demand can be predicted in advance, the vehicle is operated to aggressively charge the battery during a time period close in time to the predicted event. As a result of this aggressive charging, the battery delivers more current to satisfy the power demand without allowing the terminal voltage to decrease below a minimum level than the battery would be capable of delivering at the same state of charge following a period of rest.

主权项

1. A vehicle comprising:
a battery having a time constant; a motor configured to draw current from the battery and to deliver torque to vehicle wheels; an internal combustion engine configured to deliver torque to the vehicle wheels; and a controller configured to respond to a prediction of a future power demand event by waiting until within two time constants of the event and then operating the vehicle to supply a charging current to the battery.