Patent 12132163 was granted and assigned to LG Energy Solution (Wrocław) on October, 2024 by the United States Patent and Trademark Office.
The present invention relates to a method for manufacturing a secondary battery and a secondary battery. The method for manufacturing the secondary battery comprises an accommodation step of accommodating an electrode assembly in an accommodation part of a battery case, a vent membrane mounting step of mounting a vent membrane on a discharge hole, which passes between the inside and outside of the battery case, in the battery case, and a case sealing step of sealing the battery case, wherein the vent membrane allows only a gas to pass through the discharge hole of the battery case, but blocks a liquid.