Methods and apparatus to charge electric vehicles

An apparatus comprising:

• a battery charge level monitor to monitor a battery charge level of an electric vehicle receiving a battery charge from a mobile charging unit;
• a trip route analyzer to determine a remaining trip distance of the electric vehicle from a location of the battery charge to a trip destination;
• a charge monitoring system to determine a first target charge level for the battery charge, the first target charge level corresponding to when the battery charge level provides a first probability that the electric vehicle will reach the trip destination without an additional battery charge, wherein the first probability is associated with a first cost,
• the charge monitoring system to determine a second target charge level for the battery charge, the second target charge level corresponding to when the battery charge level provides a second probability that the electric vehicle will reach the trip destination, wherein the second probability is associated with a second cost that is different than the first cost;
• the charge monitoring system to present the first probability and the second probability to a user;
• the charge monitoring system to receive a first user selection of the first probability;
• and
• the charge monitoring system to generate a first signal to stop the battery charge when the battery charge level reaches the first target charge level, at least one of the battery charge level monitor, the trip route analyzer, or the charge monitoring system to be implemented via a processor.

A tangible computer readable storage medium comprising instructions that, when executed, cause a machine to at least:

• monitor a battery charge level of an electric vehicle receiving a battery charge from a mobile charging unit;
• determine a remaining trip distance of the electric vehicle from a location of the battery charge to a trip destination;
• determine a first target charge level for the battery charge, the first target charge level corresponding to when the battery charge level provides a first probability that the electric vehicle will reach the trip destination without an additional battery charge, wherein the first probability is associated with a first cost;
• determine a second target charge level for the battery charge, the second target charge level corresponding to when the battery charge level provides a second probability that the electric vehicle will reach the trip destination, wherein the second probability is associated with a second cost that is different than the first cost;
• present the first probability and the second probability to a user;
• receive a first user selection of the first probability;
• and
• generate a first signal to stop the battery charge when the battery charge level reaches the first target charge level.