ELECTRIC STORAGE APPARATUS AND POWER PATH SWITCH APPARATUS

An electric storage apparatus includes an electric storage device and a protective circuit for cutting off a power path when detecting abnormality including overcharge, the protective circuit being connected to an outside connecting terminal, to which a power generator and an outside load operated by electric power from the electric storage apparatus are connected. The protective circuit includes a charging or discharging path connecting the electric storage device to the outside connecting terminal, a potential difference measuring unit for measuring a potential difference at two points on the charging or discharging path, the two points on the charging or discharging path being located between a positive electrode of the electric storage device and the outside connecting terminal, a self-holding switch disposed between the two points on the charging or discharging path, and a current measuring unit for measuring a current.