| 摘要 |
PROBLEM TO BE SOLVED: To uniformly and precisely find a residual capacity all the time by evading influences of accumulation of errors due to current integration and load fluctuation. SOLUTION: A reference residual capacity SOCV(t) is calculated on the basis of an estimated value of a release voltage of a battery, and the reference residual capacity SOCV and a residual capacity SOC(t-1) before one computation period are filter-processed using a filter coefficient KB variable based on a current change rate and a battery temperature, to calculate the final residual capacity SOC. The accumulation of errors due to the current integration is eliminated thereby, and vibration due to the load fluctuation of the reference residual capacity SOCV is restrained thereby without accelerating a delay component, to find uniformly and precisely find the residual capacity all the time. COPYRIGHT: (C)2006,JPO&NCIPI
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