| 摘要 |
[Problem] To provide a method for manufacturing a highly reliable rectangular secondary battery in which an intermediate conductive member is disposed between stacked core-body exposed portions obtained by being divided into two and even if spattered dust occurs between a collector member and a welding electrode during resistance welding, the dust is seldom released into the outside. [Solution] At least one of a positive electrode core-body exposed portion (14) and a negative electrode core-body exposed portion is divided into two groups and at least one intermediate conductive member (24) having protrusions formed thereon is disposed between the two groups. A collector member (16) having projections projecting to the side of the intermediate conductive member (24) are disposed so that the projections face the protrusions provided on the intermediate conductive member (24) with the core-body exposed portion (14) interposed therebetween. The stacked core-body exposed portion (14) is pressed from both sides thereof by a pair of resistance welding electrodes (31) each having a resistance welding face having a larger diameter than the diameter of the projections provided on the collector member (16), and resistance welding is performed while parts of the projections contact the resistance welding faces of the resistance welding electrodes. |
