| 摘要 |
<p>A battery pack (60) is configured to repeatedly estimate an SOC of a cell (14) that alternately enters a charge/discharge state and a non-charge/discharge state alternately by a current accumulation method and an open circuit voltage (OCV) method. To estimate the SOC of the cell (14) by the OCV method, an error ”C in the previous SOC estimation by the OCV method is read out of a memory (S22) and an error ”C in the previous SOC estimation by the current accumulation method is read out of the memory (S24). A total error ”CS is calculated from the errors ”C read out of the memory (S26). The reference time KT is set using the total error ”CS and the SOC is estimated using the set reference time KT.</p> |
