CALCULATION DEVICE AND ALL SOLID STATE BATTERY SYSTEM

A main object of the present disclosure is to provide a calculation device capable of accurately calculating battery remaining of an all solid state battery. The present disclosure achieves the object by providing a calculation device configured to calculate battery remaining of an all solid state battery including a cathode layer, a solid electrolyte layer, and an anode layer, the calculation device comprising: a setting unit configured to set a Li occupancy state in a thickness direction of an electrode layer which is at least one of the cathode layer and the anode layer, based on operation history of the all solid state battery; and a calculating unit configured to calculate the battery remaining based on the Li occupancy state.