Energy storage device and conductive member

An energy storage device, comprising:

• an electrode assembly that includes a positive electrode plate and a negative electrode plate, the positive electrode plate and the negative electrode plate being mutually insulated;
• a case that houses the electrode assembly;
• and
• a conductive member electrically coupled to the electrode assembly in the case, wherein the conductive member includes:
• a main body part that has a central axis passing through a wall surface of the case in a direction perpendicular to the wall surface;
• and
• a conductive connection part that protrudes from the main body part in a direction perpendicular to the central axis,
• wherein the main body part includes:
• a swage portion disposed at one end portion of the main body part and inserted into the wall surface of the case, wherein the swage portion is inserted into the wall surface of the case from an outside toward an inside of the case, wherein the conductive connection part is disposed outside of the case;
• and
• a non-circular head disposed at another end portion of the main body part, the non-circular head being protruded from the conductive connection part, along the central axis, away from the wall surface;
• and
• a body between the swage portion and the head,
• wherein the wall surface, the conductive connection part, and the non-circular head are disposed in this order in the direction perpendicular to the wall surface,
• wherein the non-circular head is disposed above an entirety of the conductive connection part,
• wherein the head and the body have approximately a same shape in a cross section approximately perpendicular to the central axis,
• wherein the non-circular head and the conductive connection part are a single piece of the conductive member,
• wherein, in a longitudinal direction of the conductive connection part, from an outer edge of the conductive connection part to another outer edge of the conductive connection part, the conductive connection part extends co-planar and extends parallel to the wall surface;
• and
• the energy storage device further comprising an external terminal disposed on the outside of the case, wherein the conductive connection part is electrically coupled to the external terminal.