| 摘要 |
PROBLEM TO BE SOLVED: To provide a battery module that is able to restrict erroneous connection and reduce the number of components, by connecting a plurality of batteries in series or parallel by means of a plurality of bus bars.SOLUTION: The positive electrode terminal and negative electrode terminal of a battery are made the same in material and shape. A connection projecting part formed from at least part of each terminal in the axial direction thereof, and exposed outside the battery is given a shape with a cross-section that is not completely round in a radial direction. Each bus bar is provided with a plurality of connection recessed parts in which the corresponding connection projecting parts to be connected thereto can be accommodated, each connection recessed part being given a shape with an open cross-section that is not completely round. The respective short diameter directions of the positive electrode terminal and negative electrode terminal are made intersect each other. During connection, the respective short hole diameter directions of the connection recessed parts and the respective short diameter directions of the connection projecting parts are made the same direction, and the short hole diameters of the connection recessed parts are made shorter than the long diameters of the connection projecting parts. |
