NOVELTY - An electrical energy storage device has plate like member (140) on at least one of the first terminal and second terminal located outside of the metallic casing (130). An inner cathode terminal contacts plate like member to form a boundary between the inner cathode terminal and plate like member. A laser welded portion is formed along the boundary between the inner cathode terminal and plate like member to connect the plate like member with the inner cathode terminal.    USE - Electrical energy storage device e.g. ultracapacitor for use as main or auxiliary power supply of e.g. electric vehicle, road indicator lamp or uninterrupted power supply (UPS), and as well as auxiliary power supply of mobile communication equipment such as mobile phone, laptop computer or personal digital assistant (PDA).    ADVANTAGE - Provides electrical energy storage device with improved connection strength and resistance characteristics by the precision welding between the outer anode terminal and inner cathode terminal. Improves resistance characteristics by increasing the contact area and contact stability between the metallic casing and the inner cathode terminal of the electrical energy storage device. Improves pressure resistance performance by optimizing the thickness distribution of the metallic casing. Simplifies manufacturing operation so to reduce the manufacturing cost of the electrical energy storage device. Improves contact resistance characteristics so to enable to precisely control the size or pitch of the welding points, which makes it easy to control the tensile strength of the welded portion. Enables slope portion of the inner cathode terminal to prevent the offset of the inner cathode terminal when contacting the metallic casing and stably maintain the contact resistance. Enables side of the metallic casing near the terminal that is relatively weak against the internal pressure to be reinforced and consequently resistant against the shape deformation so that pressure resistance performance can be easily controlled by adjusting the thickness gradient of the side of the metallic casing. Provides protrusion for concentricity on the metallic casing to enable the inner cathode terminal to be correctly arranged inside of the center of the metallic casing so to reinforce the metallic casing and improve the shape deformation prevention performance of the metallic casing.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a manufacturing method for electrical energy storage device.    DESCRIPTION OF DRAWING(S) - The drawing shows the perspective view of the electrical energy storage device.    Metallic casing (130)    Bead portion (135)    Plate like member (140)    Outer anode terminal (141)