Patent ID: 8188705
Filing Date: 2012-05-29
Classification: B60L,Y02T

Abstract:
1. A charge method of a battery for an electric motor vehicle, in which a battery is charged by an outside electric source, comprising: a residual charge quantity detecting step for detecting a residual charge quantity of the battery before charging; a maximum-quantity charge time calculating step for calculating a maximum-quantity charge time which is required for the residual charge quantity of the battery becoming the maximum quantity based on detection result of said residual charge quantity detecting step; a driving-start time estimating step for estimating a driving-start time of the electric motor vehicle; a first charge step for executing a first charge in which the charge of the battery is started from a driving stop of the electric motor vehicle, continued for a specified period of charge time which is shorter than the maximum-quantity charge time calculated by said maximum-quantity charge time calculating step, and completed before the driving-start time of the electric motor vehicle estimated by said driving-start time estimating step; and a second charge step for executing a second charge in which the charge of the battery is started after said first charge step is completed and completed at the driving-start time of the electric motor vehicle estimated by said driving-start time estimating step.