Patent ID: 9000728
Filing Date: 2015-04-07
Classification: H02J

Abstract:
1. An electric charge control apparatus for a vehicle having a backup battery, which is a secondary battery for supplying electric power to in-vehicle devices mounted in the vehicle in case of emergency, the electric charge control apparatus comprising: a residual charge amount monitor unit that monitors a residual charge amount of the backup battery; a time information acquisition unit that acquires present time information indicating a present time; a time-divided temperature information storage unit that stores time-divided temperature information, which indicates a temperature in each predetermined period at a battery location of the backup battery; a charge/discharge amount determination unit that determines a charge/discharge amount of the backup battery based on the time-divided temperature information and the residual charge amount, the time-divided temperature information being acquired based on the present time information and the time-divided temperature information; a residual charge amount control unit that controls the residual charge amount of the backup battery by charging and discharging the backup battery in accordance with the charge/discharge amount determined by the charge/discharge amount determination unit; a position detection unit that detects a present position of the vehicle, wherein the time-divided temperature information storage unit stores the time-divided temperature information for each geographical area, and wherein the charge/discharge amount determination unit selects the time-divided temperature information of an area, which corresponds to the present position of the vehicle, acquires the time-divided temperature information, which corresponds to the predetermined period of the present time and the area of the present position of the vehicle, based on the selected time-divided temperature information and the acquired present time information, and determines the charge/discharge amount of the backup battery based on the time-divided temperature information and the monitored residual charge amount.