NOVELTY - The module i.e. battery pack (71), has an electrical-connection unit (60) equipped with a main body. A plated layer (63) is formed in a contact part with an electric-pole part (45) of a negative electrode terminal (42) while an insertion part (60a) penetrates the main body. The electric-pole part and the electrical-connection unit of the negative electrode terminal are connected together by screwing a fastening unit (61) to an internal thread part (49a) while the electric-pole part and the electrical-connection unit of a positive electrode terminal (41) are connected by welding process.    USE - Electrical storage apparatus module i.e. battery pack, for use in a vehicle e.g. electric vehicle (EV) and plug in type hybrid Vehicle (PHV), for storing a power supply to a electric motor from an electrical storage apparatus e.g. secondary battery (claimed) such as lithium ion secondary battery. Can also be used for a nickel-hydrogen secondary battery, a nickel cadmium secondary battery, an electrical double layer capacitor and a lithium ion capacitor.    ADVANTAGE - The electric-pole part and the electrical-connection unit of the negative electrode terminal are connected together by screwing the fastening unit to the internal thread part while the electric-pole part and the electrical-connection unit of the positive electrode terminal are connected by the welding process such that an oxide film is not interposed between the electric-pole part of the negative electrode terminal and the contact part of the main body, so that increase of a contact resistance between electrical-connection units can be prevented by the positive electrode terminal and the negative electrode terminal, thus preventing output fall of the battery pack.    DETAILED DESCRIPTION - The main body is an aluminum alloy-made-main body (62).    DESCRIPTION OF DRAWING(S) - The drawing shows an exploded perspective view of a battery pack.    Positive electrode terminal (41)    Negative electrode terminal (42)    Electric-pole parts (45, 46)    Internal thread part (49a)    Electrical-connection unit (60)    Insertion part (60a)    Fastening unit (61)    Aluminum alloy-made-main body (62)    Plated layer (63)    Battery pack (71)