Exterior for secondary battery and apparatus and method for manufacturing exterior for secondary battery

A method for manufacturing an exterior for a secondary battery, the method comprising:

• a first step of preparing a sheet and a mold in which a recess part having a recessed shape is formed;
• a second step of locating the sheet so that a portion of the sheet faces the recess part of the mold;
• and
• a third step of supplying a fluid from a side of the mold toward the recess part to form a forming part having a shape corresponding to a shape of the recess part in an area of the sheet, which is provided on the recess part,
• wherein, in the first step, the mold comprises a first mold and a second mold provided above the first mold,
• wherein, in the second step, a portion of the sheet is provided between the first mold and the second mold, wherein a first recess part of the first mold and a second recess part of the second mold are provided to face each other, wherein the recess part of the mold comprises the first and second recess parts, and
• wherein, in the second step, the sheet is folded, and the sheet is disposed between the first mold and the second mold in a state in which the sheet is divided into a first sheet part and a second sheet part by using a folded area as a boundary,
• wherein, in the second step, the folded area of the sheet defines a fold that extends across the recess part so that a portion of the recess part faces the sheet, and another portion of the recess part does not face the sheet, wherein the portion of the recess part and the another portion of the recess part are on opposing sides of the fold.