NOVELTY - The terminal assembly comprises: a terminal having a first portion and a second portion, where the second portion is made from a material that is different than a material from which the first portion is made; and a sealing tape for surrounding the terminal and sealingly covering a portion of a transition region. The first and second portions are separated from each other by the transition region. The materials from the first portion and the second portion extend from a first end and a second end of the sealing tape, respectively. The sealing tape has an inner layer and an outer layer.    USE - The terminal assembly is useful for a battery cell of a battery pack (all claimed) for electric vehicles.    ADVANTAGE - The economic terminal assembly has light-weight materials in the battery packs, so that weight of the electric vehicles can be effectively reduced, exhibits excellent mechanical strength and electrical conductivity, and reduces amount of galvanic corrosion and/or oxidation, so that performance and longevity of the battery cell can be improved.    DETAILED DESCRIPTION - The terminal assembly comprises: a terminal having a first portion and a second portion, where the second portion is made from a material that is different than a material from which the first portion is made; and a sealing tape for surrounding the terminal and sealingly covering a portion of a transition region. The first and second portions are separated from each other by the transition region. The materials from the first portion and the second portion extend from a first end and a second end of the sealing tape, respectively. The sealing tape has an inner layer that is sealingly joined to the terminal, and an outer layer that is made from a material that is thermally joinable to an inner layer of a housing of the battery cell. The material from which the outer layer is made has a lower melting temperature than a material from which the inner layer is made. INDEPENDENT CLAIMS are included for:    (1) a battery cell; and    (2) a battery pack.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic plan view of a battery cell.    Stack (20)    Anode terminal (26)    Cathode terminal (28)    Proximal portion (52)    Distal portion. (54)