When completion of timer charge before elapse of a designated time is designated by a timer charge reservation means for allowing a user to designate a predetermined charge time zone and a target amount of electric power to be charged to the battery, a timer charge start time is determined. Upon carrying out the timer charge, when it is predicted that the timer charge and battery heating are simultaneously carried out, a required amount of extension of a charge time period is determined so as to complete charge of the battery by the designated time, and starts charge of the battery at a time advanced relative to the timer charge start time by the required amount of extension of a charge time period. With this control, charge of the battery can be completed at a predetermined time without unnecessary enhancement in a required capacity of a battery heater.