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.