Patent ID: 8340932
Filing Date: 2012-12-25
Classification: G01R,H01M,H02J,Y02E

Abstract:
1. A vehicle power supply device, comprising: a power storage device; a charging device being capable of performing an internal charging operation for charging said power storage device with an electric power generated by a power generator inside the vehicle and an external charging operation for charging said power storage device by coupling to a power supply outside the vehicle; a control device for sensing a state of charge of said power storage device and controlling said charging device; a current sensing unit for sensing a current flowing into said power storage device; and a voltage sensing unit for sensing a voltage of said power storage device, wherein said control device executes first estimation processing of estimating the state of charge of said power storage device based on the current sensed by said current sensing unit and the voltage sensed by said voltage sensing unit when said internal charging operation is being performed using said charging device, and second estimation processing of estimating the state of charge of said power storage device by arithmetic different from arithmetic used in said first estimation processing based on the current sensed by said current sensing unit and the voltage sensed by said voltage sensing unit when said external charging operation is being performed using said charging device.