Sealed secondary battery and manufacturing apparatus and manufacturing method therefor

摘要

According to one embodiment, a manufacturing apparatus for a sealed secondary battery includes a chamber, pressure reduction unit, sealer transfer unit, and welding unit. The chamber accommodates therein a battery container injected with an electrolyte through an injection hole and is hermetically closed. The pressure reduction unit reduces pressure inside the chamber. The sealer transfer unit is configured to mount a sealer for sealing the injection hole on the injection hole of the battery container in the chamber decompressed by the pressure reduction unit. The welding unit is configured to laser-weld the sealer to the battery container by applying a laser beam to the peripheral edge portion of the sealer on the battery container through a laser transmission window formed in one surface of the chamber.

主权项

1. A manufacturing apparatus for a sealed secondary battery, comprising:
a chamber which accommodates therein a battery container injected with an electrolyte through an injection hole and is hermetically closed; a pressure reduction unit for reducing pressure inside the chamber; a sealer transfer unit configured to position and mount a sealer having a plate peripheral edge portion on the injection hole of the battery container in the chamber decompressed by the pressure reduction unit and maintain the sealer at a mount state in the chamber; and a welding unit configured to laser-weld the sealer maintained at the mount state to the battery container under a reduced pressure by applying a laser beam from outside the chamber to the peripheral edge portion of the sealer through a laser transmission region formed in one surface of the chamber, wherein the injection hole of the battery container is sealed by said laser-welding the sealer to the battery container.