BATTERY PACK

PROBLEM TO BE SOLVED: To provide a battery pack that facilitates fastening of a busbar and maintains a stable connection state. SOLUTION: An external positive-electrode terminal 13 of a unit cell 10a has a tubular connection part fitted with a columnar busbar 30. The connection part has a notch, cut off along the tube axial direction, while whose cross-section orthogonal to the tube axial direction has an almost C-shape. In a state of prior to fitting, the inner diameter of the connection part of the external positive-electrode terminal 13 is slightly smaller than the outer diameter of the busbar 30. The external positive-electrode terminal 13 has spring characteristics. The tip of the busbar 30 is press-fitted to the connection part of the external positive-electrode terminal 13 from an opening part, formed by the notch, so as to be connected with the external positive-electrode terminal 13 while being held by the connection part. COPYRIGHT: (C)2011,JPO&INPIT