| 摘要 |
PROBLEM TO BE SOLVED: To provide a secondary battery system in which capacity deterioration of a battery can be suppressed.SOLUTION: The secondary battery system includes: a battery controller 52 including a battery state calculation part 522 and a battery state detection part 523; and a cell controller 51. The battery state detection part 523 compares a SOC (State Of Charge) of a battery pack 41 calculated by the battery state calculation part 522 with a reference SOC (S003) when it is discriminated that the battery pack 41 becomes in a non-used state, and calculates a capacity value at which the SOC of the battery pack 41 becomes lower than the reference SOC, on the basis of difference between the SOC of the battery pack 41 and reference SOC when the SOC of the battery pack 41 is higher than the reference SOC and transmits the calculated capacity value to the cell controller 51 (S004). The cell controller 51 discharges the battery pack 41 on the basis of the capacity value transmitted from the battery state detection part 523 (S005). |
