Patent attributes
An electric charge management device for a vehicle includes a display screen and circuitry. The circuitry sets a first threshold value for a first discharge level of a battery of the vehicle. The first discharge level is greater than a zero state of charge (SOC) of the battery. The circuitry sets a second threshold value for a second discharge level of the battery based on first information associated with the vehicle and/or a user of the vehicle. The circuitry determines a first energy cost for an energy amount between the second discharge level and a current SOC of the battery. The circuitry controls the vehicle to transfer the energy amount to an external electric power system, which is different from the electric charge management device, based on the determined first energy cost.
