| 摘要 |
PROBLEM TO BE SOLVED: To provide a storage residual amount estimation device capable of achieving the downsizing of the whole system while accurately estimating the storage residual amount of a storage battery.SOLUTION: The storage residual amount estimation device 3 includes sensors 5 and 6 for observing the state of a storage battery 2, and a residual amount estimation unit 15. The residual amount estimation unit 15 updates the state of the storage battery 2 using a Kalman filter, on the basis of the state vector xshowing the state of the storage battery 2 using a plurality of elements included in an equivalent circuit model 20 obtained by modeling the storage battery 2 and the observation vector yshowing the observation value based on the observation result, and estimates the SOC of the storage battery 2. The plurality of elements are expressed by a linear function of time and a constant number. |
