| 摘要 |
PURPOSE:To secure safety sufficiently even if a battery is improperly used by forming at least a part of a current path connecting a nickel positive electrode and a battery positive electrode terminal by a fusible alloy having a melting point of 100-200 deg.C. CONSTITUTION:At least a part of a current path connecting a nickel positive electrode and a battery positive electrode terminal 1 is formed by a fusible alloy 2 having a melting point of 100-200 deg.C in an alkaline secondary battery containing a group of plates having a nickel positive electrode. First a paste type nickel positive electrode is made, and to its end portion one end of a tab is welded so as to form a terminal for welding 1, whose both end portions are made of Ni or Ni plated Fe. The center portion of the tab is formed by a fusible metal 2 having a melting point of 120 deg.C. The alloy 2 is covered by a heat contraction tube made of fluororesin, so that the alloy 2 is isolated from electrolyte and so as to prevent the fused alloy 2 from causing an internal short circuit. Thereby it is possible to secure safety sufficiently even if the battery itself is used improperly. |
