After the remaining capacity operation device and its remaining capacity operation mannered null

摘要

PPROBLEM TO BE SOLVED: To provide a remaining capacity operating device and its method capable of reducing the difference between the capacity actually used in the secondary battery and the estimated remaining capacity. PSOLUTION: This remaining capacity operating device of the secondary battery has a count part counting the number of times of change from self-discharging state to charging state or from charging state to self-discharging state of the secondary battery, after the secondary battery is completely discharged, a temperature measuring part measuring a temperature, a remaining capacity estimating part estimating the remaining capacity of the secondary battery on the basis of the number of times, and an output part outputting the information on the remaining capacity. The remaining capacity estimating part derives the reduction of remaining capacity caused by memory effect on the basis of at least one of the number of times and the temperature during a self-discharging period, and estimates the present remaining capacity by subtracting self-discharge electric quantity and reduction of remaining capacity from original remaining capacity in self-discharging, and estimates a value obtained by adding charged electric quantity to a value obtained by adding reduction of remaining capacity to remaining capacity estimated in self-discharging, as remaining capacity in charging. PCOPYRIGHT: (C)2004,JPO&NCIPI