Patent ID: 8466708
Filing Date: 2013-06-18
Classification: G01R

Abstract:
1. A state detection device for power supply system comprising: a measurement unit that obtains current, voltage, and temperature at a chargeable and dischargeable power storage unit as measurement values; a storage unit that stores property information of the power storage unit; an arithmetic unit that uses different methods to calculate a first state of charge and a second state of charge, each of which indicates a state of charge of the power storage unit, based upon the measurement values and the property information stored in the storage unit; a conflict detection unit that monitors a calculation result of a state of charge by the arithmetic unit during charging or discharging of the power storage unit, and detects the calculation result as a conflict in an event that a difference between the first state of charge and the second state of charge is equal to or greater than a predetermined threshold; and a correction unit that corrects the property information stored in the storage unit in response to the conflict having been detected by the conflict detection unit.