NOVELTY - The body (10) has a part (15) comprising same material as a negative electrode lead and connected to the negative electrode lead. The part and another part (14) are joined to each other at a portion excluding a positive electrode joint as a portion to be joined to a positive electrode lead and a negative electrode joint as a portion to be joined to the negative electrode lead. Insulating material (20) e.g. thermoplastic resin, is provided at a position between the parts and near to a joint portion to join the parts to prevent a contact between the parts.    USE - Body for electrically connecting a positive electrode lead and a negative electrode lead of a laminated lithium-ion secondary battery cell in a nonaqueous electrolyte electricity storing device (claimed) utilized in devices. Uses include but are not limited to mobile communication devices, notebook computers, electric vehicles, hybrid vehicles and electric power storage systems.    ADVANTAGE - The insulating material is melted by heat generated during an ultrasonic joining and pushed out from a center portion of the joint toward a periphery of the joint such that the periphery of the joint is filled with the insulating material, thus insulating the joint from ambient atmosphere and preventing corrosive solvent from entering the joint, suppressing occurrence and progress of corrosion phenomenon at the joint caused by local cell effect in the parts and obtaining high joint reliability, and hence securing connection of the nonaqueous electrolyte electricity storing device and realizing simplification of assembly process of the device. The body is manufactured in different processes to utterly prevent manufacturing defect in the body from affecting production of the battery cell, thus reducing manufacturing cost of the body.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following:    (1) a nonaqueous electrolyte electricity storing device    (2) a method for manufacturing a nonaqueous electrolyte electricity storing device.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a body for electrically connecting a positive electrode lead and a negative electrode lead of a battery cell.    Body for electrically connecting positive electrode lead and negative electrode lead (10)    Parts (14, 15)    Joint (19)    Insulating material (20)