| 摘要 |
There are implemented a method which allows a present state of charge to be precisely estimated not only for a new battery, but also for a lead accumulator that has deteriorated with the lapse of a certain period since fist use thereof, and a lead accumulator which can be increased in lifetime and reduced in cost using information on the precisely determined state of charge. An accumulator device includes an accumulator, a terminal voltage measurement unit for measuring a terminal voltage of the accumulator, a current measurement unit for measuring a current flowing in the accumulator, multi-dimensional characteristic models in which a plurality of relational models each between the measured terminal voltage, current and the state of charge are prepared for each of deterioration degrees, a deterioration degree estimation unit for estimating a present deterioration degree of the accumulator, a corresponding model selective determination unit for selectively determining, based on the deterioration degree determined by the deterioration degree estimation unit, a corresponding model from among the multi-dimensional characteristic models, and a state of charge estimation unit for estimating the present state of charge using the model selectively determined by the corresponding model selective determination unit. |
