| 摘要 |
The present invention relates to an all-solid battery system having high energy density. The all-solid battery system of the present invention comprises: an all-solid battery and a discharge control unit which controls discharge of the all-solid battery. A positive electrode active material layer comprises a positive electrode active material particle, and a sulfide solid electrolyte particle. A ratio (T/t) of the actual thickness (T) of the positive electrode active material layer to the valid thickness (t) of the positive electrode active material layer, which is calculated by an equation to be stated below, is satisfied with T/t greater than or equal to 0.01 and less than or equal to 0.15. The equation is t = V/i ×κ′, wherein V is an operation voltage width, i is the current density (mA/cm^2) during the discharging, and κ′ is the valid Li ion conductivity of the positive electrode active material layer (S/cm). |
