Patent ID: 9299964
Filing Date: 2016-03-29
CPC Classification: H01M,Y02E

Claim Text:
1. An energy storage element comprising: a container; an electrode assembly housed in the container; an electrode terminal; a current collector which electrically connects the electrode terminal and the electrode assembly; and an internal insulation sealing member which insulates the container and the current collector, wherein the container includes a wall having an outer surface and an inner surface, the outer surface has a protrusion part formed to protrude outward from the outer surface, the inner surface has a recess part formed at a position corresponding to a position of the protrusion part, the recess part has a bottom surface which is outermost and an inner side surface formed continuously between the bottom surface and the inner surface of the wall of the container, at least part of the inner side surface of the recess part is formed to be tilted with respect to a direction in which the protrusion part protrudes, and the internal insulation member is positioned between the current collector and the recess part of the container, and has a first wall part which is parallel to the at least part of the inner side surface of the recess part.