| abstract |
Provided is a battery pack which can reliably control the temperature of a plurality of unit cells and can operate a safety mechanism satisfactorily while being relatively low in cost. SOLUTION: A unit 52 is interposed between a metal wire (A line) 50 and a metal wire (B line) 51 for the unit cells 2 (2a to 2f) of the battery pack 1, and the metal wires 50, 51 are interposed. The heat sensitive body 5 constituted by separating them is arranged, and pressed to the unit cell 2 (2a to 2f) side with the tape 6. When the abnormal battery temperature rises, the fusible body 52 melts and the cut-off circuit 300 detects that the metal wires 50 and 51 are short-circuited, and the conduction of the external input / output lines 7a and 7b is cut off. [Selection] Figure 1 |