Patent ID: 7595129

Claim:
A battery pack, comprising: a secondary battery unit formed by a connection of more than one sheet-shaped secondary battery through a terminal block; and an exterior case adapted to hold said secondary battery unit so as to allow a power of said secondary battery unit to be supplied to an external apparatus, wherein, said secondary battery has, on one width end surface, a positive terminal and a negative terminal, said secondary battery unit has more than one secondary battery cell pair obtained by a multi-layered thickness-wise arrangement of said more than one secondary battery cell with their respective positive and negative terminals facing the same direction, provides a sequentially width-wise arrangement of said more than one secondary battery cell pair, and is fabricated by providing, through said terminal block, a connection of said positive terminal and said negative terminal of each secondary battery cell, and each of said secondary battery cell pairs is provided in a multi-layered arrangement, such that one terminal of one battery of the second battery cell pair oppositely faces a polarity opposite terminal of the other battery of the second battery cell pair along the thickness of the second battery cell pair.