Patent ID: 9063200
Filing Date: 2015-06-23
Classification: G01R,H01M,Y02E

Abstract:
1. A method of determining malfunction that detects rechargeable battery voltage and charging and discharging current as a time series with a voltage detection section and a current detection section provided in a malfunction decision circuit, and judges whether or not the current detection section is malfunctioning, the method comprising: detecting rechargeable battery voltage and charging and discharging current as a time series with the voltage detection section and the current detection section, respectively; and judging whether or not there is a malfunction based on whether or not the voltage detected by the voltage detection section rises while the charging and discharging current detected by the current detection section is below a prescribed current, wherein the current detection section is judged as malfunctioning when the voltage detected by the voltage detection section rises from a voltage below a second voltage, which is below a first voltage that is lower than the rechargeable battery full-charge voltage, to a voltage above the first voltage, wherein the number of times that the voltage detected by the voltage detection section rises from a voltage below the second voltage to a voltage above the first voltage is counted, and wherein the current detection section is judged as malfunctioning when the count becomes greater than or equal to a prescribed number.