Patent ID: 9166219
Filing Date: 2015-10-20
Classification: H01M,Y02E,Y02P

Abstract:
1. An electric storage device, comprising: an outer covering; an external terminal having an exposed face exposed outside from the outer covering; a current collector disposed inside the outer covering and connected to the external terminal; and an electrode assembly disposed inside the outer covering and connected to the current collector, wherein the outer covering is substantially in a shape of a rectangular parallelepiped and formed by a lid body forming one face of the outer covering and an electric storage device case forming other faces of the outer covering, wherein the electrode assembly is formed by winding sheet-shaped positive electrode and negative electrode into a flat shape with a separator interposed therebetween and housed in the electric storage device case so that curved portions obtained by the winding are positioned on a lid body side and a bottom face side; wherein the lid body includes an electrolyte solution filling portion that opens to a clearance formed between one of the curved portions of the electrode assembly and the outer covering, wherein the electrolyte filling opening is entirely formed outside of a longitudinal centerline of the lid body and opens in a position displaced sideways from a position where said one of the curved portions of the electrode assembly protruded most, and wherein a single electrode assembly including the electrode assembly is housed in the electric storage device case.