Patent ID: 8577529
Filing Date: 2013-11-05
Classification: B60L,G01R,H02J,Y02T

Abstract:
1. A control apparatus for a vehicle, wherein the vehicle includes a battery and a motor that drives by receiving electrical power from the battery, and characteristics of changes in open circuit voltage relative to a status of charge of the battery include a first region in which an amount of change in the open circuit voltage relative to an amount of change in the status of charge exceeds a threshold value, and a second region in which the amount of change in the open circuit voltage relative to the amount of change in the status of charge does not exceed the threshold value, the control apparatus comprising: a first estimation unit that, in the case an estimated value of the status of charge of the battery falls within the first region, updates the estimated value of the status of charge of the battery by estimating the status of charge according to a first estimation method that uses the voltage of the battery; a second estimation unit that, in the case the estimated value of the status of charge of the battery falls within the second region, updates the estimated value of the status of charge of the battery by estimating the status of charge according to a second estimation method that uses current that is input and output to and from the battery; and a third estimation unit that, in the case a period, during which the estimated value of the status of charge of the battery falls within the second region, exceeds a prescribed period, temporarily changes the status of charge of the battery so that the status of charge of the battery falls within the first region and estimates the status of charge by the first estimation method.