Electricity storage device

Abstract

The present disclosure provides an electricity storage device that includes a case and an electrode assembly accommodated in the case. The case includes a case body having an opening surrounded by side walls including a pair of first walls, and a lid configured to seal the opening. The electrode assembly includes a laminated part formed by laminating a positive electrode and a negative electrode in an insulated state in a direction toward the lid. The lid includes a base part and a pair of first bent parts extending from the base part along the pair of first walls of the case body, the pair of first bent parts facing each other. At least one of the pair of first bent parts is joined to at least one of the pair of first walls of the case body via a first welding joining part.

Dependencies are inferred from the claim text.