Patent ID: 8260564
Filing Date: 2012-09-04
Classification: B60L,G01R,Y02T

Abstract:
1. An apparatus for calculating a state of charge of a power storage system provided with a first power storage device and a second power storage device, the apparatus comprising: a device to calculate a first state of charge of said first power storage device; a device to calculate a second state of charge of said second power storage device; a selection device to select a higher one of said first state of charge and said second state of charge when a sum of said first state of charge and said second state of charge is larger than or equal to a predetermined first value, and to select a lower one of said first state of charge and said second state of charge when the sum of said first state of charge and said second state of charge is smaller than said first value; a setting device to set a first coefficient in accordance with a selected state of charge, and set a second coefficient so as to be lower than said first coefficient; and a calculation device to add a product of said first coefficient and said selected state of charge to a product of said second coefficient and the other state of charge, to thereby calculate the state of charge of said power storage system.