ALL-SOLID-STATE BATTERY SYSTEM AND METHOD OF MANUFACTURING THE SAME

An all-solid-state battery system includes: an all-solid-state battery (6) that includes a positive electrode active material layer, a solid electrolyte layer, and a negative electrode active material layer; and a control device (100) that controls a charge-discharge voltage during use of the all-solid-state battery. The negative electrode active material layer contains alloy negative electrode active material particles. The amorphization degree of the alloy negative electrode active material particles is comprised between 27.8% and 82.8% and satisfies the following conditions 0.32¤Z/W¤0.60, where Z: a controlled discharge capacity (mAh) of the all-solid-state battery, and W: a theoretical capacity (mAh/g) of the alloy negative electrode active material particles×a total weight (g) of the alloy negative electrode active material particles×the amorphization degree (%).