| 摘要 |
PURPOSE:To provide a lead-acid battery having good airtightness in a passing hole by pushing out a flat electrode post into a passing hole of a partition of a container with cone-shaped welding electrodes, then by performing resistance welding. CONSTITUTION:An electrode group having flat electrode posts 3 and 3' is inserted in a container which has a passing hole 2 in its partition 1. Cone-shaped welding electrodes 4 and 4' which has a top angle theta of 90-150 deg. and a 1-2mm. larger base diameter D than the passing hole diameter d are pushed from the back of both electrodes 3 and 3' facing the passing hole 2 to deform the electrode posts 3 and 3' in a cone shape. The electrode posts 3 and 3' are pushed out into the passing hole 2 and brought into contact each other, then current is passed to both posts 3 and 3' to weld them. |
