Charge / discharge control device, charge / discharge control method, battery pack, electronic device, electric vehicle, electric tool, and power storage system

摘要

Provided are a charge / discharge control device and a charge / discharge control method capable of improving cycle characteristics without lowering the volumetric energy density of a secondary battery. In the present disclosure, a determination unit 1 that determines an ion diffusion rate responsible for electrical conduction in the secondary battery 4 and determines a time integrated value of an overcharge amount of the active material based on the ion diffusion rate and a charging condition; Based on the determination result obtained by the unit 1, the evaluation unit 2 that evaluates the charging condition of the secondary battery 4, and when the secondary battery 4 is charged or discharged based on the evaluation result obtained by the evaluation unit 2 The charging / discharging control apparatus 10 provided with the charging / discharging control part 3 which controls the state of the electric current application to the secondary battery 4 in this and a voltage application is provided.