AUXILIARY CHARGE CONTROL DEVICE FOR ELECTRIC VEHICLE

PROBLEM TO BE SOLVED: To suppress occurrence of exhaustion of a battery for accessories as well as enhancing efficiency of electric consumption of an electric vehicle.SOLUTION: A vehicle control ECU20 of an auxiliary charge device 10 determines, after a system of an electric vehicle 12 stops, a voltage drop planned value V0, referring to tables indicating relationships of a voltage V of a battery for accessories, and with an auxiliary charge start time Ts_table(V), and with a voltage drop planned value V0_table(V), calculates a correction coefficient k, using the determined voltage drop planned value V0, and adjust a next auxiliary charge start time Ts on the basis of the calculated correction coefficient k.SELECTED DRAWING: Figure 1 【課題】補機用電池のバッテリ上がりの発生を抑制すると共に、電動車両の電費を向上させる。【解決手段】補充電制御装置１０の車両制御ＥＣＵ２０は、電動車両１２のシステム停止後、補機用電池電圧Ｖと補充電開始時間Ｔｓ＿ｔａｂｌｅ（Ｖ）及び電圧低下目論見値Ｖ０＿ｔａｂｌｅ（Ｖ）との関係を示すテーブルを参照して、電圧低下目論見値Ｖ０を求め、求めた電圧低下目論見値Ｖ０等を用いて補正係数ｋを算出し、算出した補正係数ｋに基づき次回の補充電開始時間Ｔｓを調整する。【選択図】図１