Patent ID: 7622894
Filing Date: 2009-11-24
Classification: B60L,G01R,H02J,Y02T

Abstract:
1. A status detector for a power supply, comprising: measuring means for obtaining measured values of at least current, voltage and temperature of electricity accumulating means; memory means for storing characteristic information of said electricity accumulating means; processing means for executing status detection of said electricity accumulating means by using the measured values and the characteristic information of said electricity accumulating means which is stored in said memory means to calculate a value of status detection; discrepancy detecting means for detecting from a theoretical value when the calculated value of the status detection obtained by said processing means is changed over a predetermined threshold or reversed with respect to the measured values obtained by said measuring means; and modifying means for modifying the characteristic information used subsequently for status detection value calculation by said processing means and stored in said memory means depending on the discrepancy detected by said discrepancy detecting means; wherein said modifying means make modification to increase internal DC resistance of said electricity accumulating means as one item of the characteristic information when the result of the status detection is changed over the predetermined threshold, and modification to decrease the internal DC resistance of said electricity accumulating means as one item of the characteristic information when the result of the status detection is reversed with respect to the measured values obtained by said measuring means.