| 摘要 |
PURPOSE:To decrease the resistance of a current collector to make high rate discharge possible by installing a projection which brings a lead into contact with a current collecting part in the part, facing the current collecting part, of the lead or the current collecting part. CONSTITUTION:When a battery is discharged, current flows from the end 1A of a cathode plate 1 to a cathode terminal 4C of a cover 4B through a current collecting part 5A of a current collector 5, and a lead 5B, and also flows through a short path of the current collecting part 5A, a projection 5E, and the part 5B1, facing the current collecting part, of the lead 5B. The current flow is not concentrated on the root of the lead 5B and is dispersed. The resistance is decreased and high rate discharge is made possible. Since the projection 5E is in contact with the center of the current collecting part 5A, uneven current collection caused by connecting the current collecting part 5A to the end 1A of the cathode plate 1 by blanket welding is prevented and uneven current flow from the current collecting part 5A is also prevented. The resistance is therefore decreased to make high rate discharge possible. |
