Pouch and secondary battery comprising the same
AssigneeLG Chem, Ltd.
InventorsSeung Yeob Park, Han Ho Lee, Young Joon Shin
Life of this patent
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Abstract
Disclosed is a pouch including a first sealing portion wherein an upper sheet and a lower sheet are sealed, and a second sealing portion present in a partial or entire region of the first sealing portion. The pouch further includes a second sealing portion present in a partial or entire region of the first sealing portion, thus efficiently preventing permeation of external moisture and leakage of electrolyte solution through the first sealing portion and enabling fabrication of batteries with improved capacitance maintenance and resistance increase.
Claims14
A pouch comprising:
- a first sealing portion wherein an upper sheet and a lower sheet are sealed;
- and
- a second sealing portion, the second sealing portion being formed of an aluminum metal foil tape or an aluminum metal foil tape having at least one surface coated with an electrical insulator in a partial or entire region of at least one surface where the first sealing portion is formed, wherein the second sealing portion has a thickness of 0.1 to 400 μm, and wherein the second sealing portion is formed in a portion of the first sealing portion where electrode taps are not formed.
A pouch having an upper sheet and a lower sheet, comprising:
- a first sealing portion to be sealed;
- and
- a second sealing portion that is formed in a partial or entire region of at least one surface where the first sealing portion is formed, wherein the second sealing portion is present in a region of the first sealing portion where electrode taps are not formed, and wherein the second sealing portion has a thickness of 0.1 to 400 μm.
A pouch having an upper sheet and a lower sheet, comprising:
- a first sealing portion to be sealed;
- and
- a second sealing portion that is formed in a part of at least one surface where the first sealing portion is formed, among four surfaces of the pouch where the first sealing portion is formed, wherein the second sealing portion extends from an end of the sealing portion, wherein the second sealing portion has a thickness of 0.1 to 400 μm, and wherein the second sealing portion is formed in a portion of the first sealing portion where electrode taps are not formed.
Dependencies are inferred from the claim text.