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US 12,770,961 B2Granted
Pouch film laminate body and battery case manufactured using same
AssigneeLG Energy Solution, Ltd.
InventorsSoo Ji Hwang, Dae Woong Song, Sang Hun Kim, Hyung Kyun Yu, Min Hyeong Kang, Hun Hee Lim
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Abstract
Disclose herein is a pouch film laminate body including a gas barrier layer, a base layer disposed on one surface of the gas barrier layer, and a sealant layer disposed on the other surface of the gas barrier layer. A loop stiffness of the pouch film laminate body in machine direction of the pouch film laminate body may be 750 mN to 1300 mN.
Claims8
A battery case manufactured by drawing molding a pouch film laminate body, the pouch film laminate body comprising:
- a gas barrier layer defining a thickness of 60 μm to 100 μm;
- a base layer disposed on one surface of the gas barrier layer, the base layer including a laminate structure of a polyethylene terephthalate film and a nylon film;
- and
- a sealant layer disposed on an opposite surface of the gas barrier layer, the sealant layer defining a thickness of 60 μm to 100 μm,
- wherein a loop stiffness of the pouch film laminate body in a machine direction (MD) of the pouch film laminate body is 750 mN to 1300 mN, a ratio of a loop stiffness of the pouch film laminate body in a transverse direction of the pouch film laminate body to the loop stiffness in the machine direction is 0.9 to 1.1,
- wherein the battery case includes at least one cup portion, wherein the cup portion has a depth of 10 mm or greater, and a curl height of 25 mm or less.
3 more elements
Dependencies are inferred from the claim text.