SEALED BATTERY AND MANUFACTURING METHOD OF SAME

摘要

In a manufacturing method of a sealed battery, a positive terminal is provided on one end portion of a lid and a negative terminal is provided on another end portion of the lid. An end surface on the positive terminal side of the lid is inserted into an opening, and made to contact an inside wall of the opening. Then, an end surface on the negative terminal side of the lid is inserted into the opening, and the battery can and the lid are welded together. Therefore, even if metal foreign bodies get into the battery can at the time of manufacture, they will get in on the negative terminal side, so a decrease in voltage of the sealed battery is able to be suppressed.

主权项

1. A manufacturing method of a sealed battery that includes a battery can and a lid, the battery can having a stepped opening, and the lid including a first end portion provided with a positive terminal and a second end portion provided with a negative terminal, the manufacturing method comprising:
(a) a first step of inserting an end surface of the first end portion of the lid into the opening of the battery can, and making the end surface of the first end portion of the lid contact an inside wall of the opening; (b) a second step of inserting an end surface of the second end portion of the lid into the opening, and fitting the lid into the opening; and (c) a third step of welding the battery can and the lid together.