Patent ID: 9236745
Filing Date: 2016-01-12
CPC Classification: B60K,B60L,B60W,G01R,H02J,Y02T

Claim Text:
1. A control device for a vehicle, the vehicle including a battery, an auxiliary load, an electric power controller, and a charger, the electrical power controller being configured to control electric power exchanged between the battery and the auxiliary load, the charger being configured to carry out external charging in which a power supply outside the vehicle is used to charge the battery, the control device comprising: a first controller configured to, during drive control of the vehicle, control the electric power controller so that a state of charge that is a ratio of an actual amount of charge to a full charge capacity of the battery falls within a predetermined range; a second controller configured to, when the power supply is connected to the vehicle, control the electric power controller and the charger so as to carry out extended charging in which a variation in the state of charge during the external charging is larger than a width of the predetermined range that is a control range from a control lower limit value to a control upper limit value during drive control; and a calculator configured to calculate the full charge capacity by multiplying a ratio of a maximum value of the state of charge, which is a value of 100 percent, to a variation in the state of charge during the extended charging by an accumulated value of current flowing into the battery from a start of the extended charging; wherein when the power supply is connected to the vehicle, the second controller carries out first discharging in which the battery is discharged until the state of charge decreases to a first state of charge that falls within a first range lower than a lower limit value of the predetermined range, starts the extended charging after the first discharging is ended, and ends the extended charging at the time when the state of charge has reached a second state of charge that falls within a second range higher than an upper limit value of the predetermined range; wherein the battery has a characteristic such that a variation in the state of charge with respect to a unit variation in voltage of the battery in the first and second ranges is smaller than a variation in voltage of the state of charge with respect to a unit variation in voltage of the battery in the predetermined range, wherein the control device further comprises a voltage sensor detecting a voltage of the battery, and wherein the calculator calculates a state of charge at the time when the extended charging is started on the basis of an output from the voltage sensor at the time when the extended charging is started, calculates a state of charge at the time when the extended charging is ended on the basis of an output from the voltage sensor at the time when the extended charging is ended, and calculates a difference between the calculated state of charge at the time when the extended charging is started and the calculated state of charge at the time when the extended charging is ended as a variation in the state of charge during the extended charging.