| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent an insulating ring from protruding from between each upper face of electrodes and underside of annular grooves, even if the projecting portion of the annular groove into a packaging can abuts against the insulating ring. <P>SOLUTION: This alkaline storage battery comprises an electrode assembly which is formed by welding an current collector 14 on the top portion of an electrode group, including positive electrodes 11, separators 13, and negative electrodes 12; and a packaging can 16 which contains an alkali electrolyte, and has a annular groove 16a at the upper circumference portion and is sealed with a seal-opening closure at the opening portion. A planar insulating ring 17, having a cut portion, is arranged between the underside of the annular groove 16a and the topside of the current collector 14, both ends of the cut portion 17a approaching each other due to the pressure applied from the ring-like groove 16a. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
