SECONDARY BATTERY SYSTEM

摘要

Provided is a secondary battery system capable of suppressing degradation of a battery capacity. When it is determined that a battery pack is brought into a non-use state, a battery state detection unit in a battery controller compares an SOC of the battery pack calculated by a battery state operation unit and a standard SOC. When the SOC of the battery pack is higher than the standard SOC, the battery state detection unit in the battery controller calculates a capacity value in which the SOC of the battery pack becomes lower than the standard SOC, from a difference of the SOC of the battery pack and the standard SOC, and transmits the calculated capacity value to a cell controller. The cell controller discharges the battery pack, on the basis of the capacity value transmitted from the battery state detection unit.

主权项

1. A secondary battery system for controlling charge/discharge of one or more battery packs,
wherein a negative electrode active material of the battery pack is a material having a first potential stabilized phase and a second potential stabilized phase of an SOC lower than an SOC of the first potential stabilized phase as stabilized phases in which a potential with respect to the SOC is almost constant, and the secondary battery system includes an SOC control device that executes at least discharge control of the battery pack such that the SOC of the battery pack becomes a value in a range of the second potential stabilized phase, at least when the battery pack is brought into a non-use state, on the basis of a use state of the future of the battery pack.