Secondary battery and method for manufacturing the same, and pouch for secondary battery and method for manufacturing the same
AssigneeLG Chem, Ltd.
InventorsNa Yoon Kim, Yong Su Choi, Sang Hun Kim, Hyung Kyun Yu, Soo Ji Hwang, Min Hyeong Kang, Yong Kim
Life of this patent
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Abstract
To solve the above problems, a pouch for a battery according to an embodiment of the present invention includes: a cup part that accommodates an electrode assembly and is formed by laminating a surface protection layer, a gas barrier layer including a metal, and a sealant layer; and a degassing part in which a degassing aperture is punched when a degassing process is performed and in which no gas barrier layer is formed.
Claims20
A method for manufacturing a secondary battery, the method comprising steps of:
- forming a first adhesion surface by applying an adhesive to a portion of both surfaces of a metal plate while the metal plate is transferred;
- cutting the metal plate;
- forming a plurality of first lamination plates by respectively laminating a plurality of surface protection plates on the both surfaces of the metal plate;
- forming a second adhesion surface by applying the adhesive on an entire surface of at least one of the plurality of first lamination plates, on which the metal plate is laminated;
- forming a second lamination plate by laminating a sealant plate on the second adhesion surface to;
- cutting the second lamination plate to manufacture a pouch comprising a cup part in which the metal plate exists and a degassing part in which no metal plate exists;
- accommodating an electrode assembly in an accommodation space formed in the cup part;
- opening a portion of an edge of the pouch to form an opening and sealing a remaining portion of the edge;
- injecting an electrolyte through the opening;
- primarily sealing the opening;
- punching a degassing aperture in the degassing part;
- performing a degassing process;
- and
- secondarily sealing the degassing part.
A pouch for a secondary battery, the pouch comprising:
- a cup part configured to accommodate an electrode assembly, wherein the cup part is formed by laminating a surface protection layer, a gas barrier layer comprising a metal, and a sealant layer;
- and
- a degassing part configured to have a degassing aperture punched when a degassing process is performed, wherein the degassing part does not have the gas barrier layer.
A method for manufacturing a pouch for a secondary battery, the method comprising steps of:
- forming a first adhesion surface by applying an adhesive to a portion of both surfaces of a metal plate while the metal plate is transferred;
- cutting the metal plate;
- forming a plurality of first lamination plates by respectively laminating a plurality of surface protection plates on the both surfaces of the metal plate;
- forming a second adhesion surface by applying the adhesive on an entire surface of at least one of the plurality of first lamination plates, on which the metal plate is laminated;
- forming a second lamination plate by laminating a sealant plate on the second adhesion surface;
- and
- cutting the second lamination plate to form a piece comprising a cup part in which the metal plate exists and a degassing part in which no metal plate exists.
Dependencies are inferred from the claim text.