US Patent 8981723 Air battery system

An air battery system that can inhibit production of hydrogen. The air battery system includes a battery cell which is provided with an air electrode, an anode containing an active material capable of releasing lithium ions, and a solid electrolyte layer and aqueous electrolytic solution layer having lithium ion conductivity which are disposed between the air electrode and the anode; a detecting device which is capable of detecting a voltage between the anode and the air electrode; and a signaling device which emits a signal when the voltage detected by the detecting device becomes 2.2 V or less.