Patent ID: 8880264

Claim:
A charging control apparatus for an electric vehicle in which a driving battery loaded on the vehicle is charged by power supplied from an external power supply via a charger, comprising: a charging efficiency computation device that computes a charging efficiency of the driving battery; a state of charge computation device that computes a state of charge of the driving battery; a switching device that switches, in response to a request from a user of the vehicle, between a first charging mode in which the charger is controlled based on the charging efficiency to charge the driving battery, and a second charging mode in which the charger is controlled based on the state of charge to charge the driving battery; a charger-supplied power computation device that computes power supplied from the external power supply to the charger, and a battery-supplied power computation device that computes power supplied from the charger to the driving battery, wherein the charging efficiency computation device computes the charging efficiency based on results of computations by the charger-supplied power computation device and the battery-supplied power computation device.