Bag film for secondary battery, preparation method of bag film, secondary battery and preparation method of secondary battery

The present invention relates to a secondary battery pouch film and a method for manufacturing the same, the secondary battery pouch film comprising a laminate in which at least an outer layer, a barrier layer, and a sealant layer are laminated in this order, the sealant layer comprising an extruded...

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Bibliographische Detailangaben
Hauptverfasser:	SONG LUZHENG, KIM YOO-HAN, JANG JI-EUN, HAN HEE-SIK, LEE DOO-HEE
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRICITY INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM MEASURING PERFORMING OPERATIONS PHYSICS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY TESTING TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR TRANSPORTING
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Beschreibung
Zusammenfassung:	The present invention relates to a secondary battery pouch film and a method for manufacturing the same, the secondary battery pouch film comprising a laminate in which at least an outer layer, a barrier layer, and a sealant layer are laminated in this order, the sealant layer comprising an extruded layer and a polypropylene layer positioned below the extruded layer, the thickness ratio of the polypropylene layer in the sealant layer being greater than 0.5, and the thickness ratio of the polypropylene layer in the sealant layer being greater than 0.5. The sealant layer has a yield strength of 17.50 to 19.99 N/mm2 in the MD direction, an upper yield strength of 17.00 to 19.99 N/mm2 in the TD direction, and a glass transition temperature (Tg) of-20 DEG C to-10 DEG C. The bag film not only has excellent normal-temperature sealing strength and high-temperature sealing strength, but also has excellent normal-temperature sealing strength maintaining characteristics and high-temperature sealing strength maintaining