| 摘要 |
Provided is an apparatus that highly accurately estimates the state of charge of a secondary cell. The apparatus is provided with: a voltage measuring unit (22), which measures the terminal voltage of a secondary cell (30); a current measuring unit (23), which measures a charge/discharge current of the secondary cell (30); and a control unit (26), which estimates the state of charge (SOC) of the secondary cell (30). The control unit (26) estimates the SOC by integrating the charge/discharge current obtained by reducing a current offset from the charge/discharge current. Furthermore, the terminal voltage of the secondary cell (30) is estimated on the basis of a measurement model, a first correction value for an estimated current offset, and a second correction value for the estimated SOC are calculated using an error between the estimated terminal voltage and the terminal voltage measured by means of the voltage measuring unit (22), and the current offset and the SOC are corrected. |
