SAFETY MECHANISM FOR RECTANGULAR BATTERY AND METHOD OF MANUFACTURING THE SAME

摘要

A safety mechanism for rectangular battery having a groove (10) cut in the long side face (1a) of a battery case (1) and provided with a thin easy-to-tear part (12) provided between the bottom of the groove (10) and the inner face of the battery case (1) and torn when the inner pressure of the battery case (1) reaches a specified level. When the safety mechanism is manufactured, a cutter (37) rotating at high speed through a high speed rotator (30) is positioned in a relative position of a specified depth cut into the long side face (1a) of the battery case (1) of a completed rectangular battery and then the high speed rotator (30) or the rectangular battery is relatively moved linearly.