CELL POUCH FILM MAINTAINING OR INCREASING HIGH-TEMPERATURE SEALING STRENGTH, METHOD FOR PREPARING THE SAME, SECONDARY BATTERY USING THE CELL POUCH AND METHOD FOR MANUFACTURING THE SECONDARY BATTERY

CELL POUCH FILM MAINTAINING OR INCREASING HIGH-TEMPERATURE SEALING STRENGTH, METHOD FOR PREPARING THE SAME, SECONDARY BATTERY USING THE CELL POUCH AND METHOD FOR MANUFACTURING THE SECONDARY BATTERY

Disclosed is a cell pouch film, comprising at least an outer layer, a barrier layer, and a sealant layer structured in that order, wherein the sealant layer is formed by extrusion on the barrier layer, wherein the sealant layer has a glass transition temperature (Tg) of -10°C to -7°C, and wherein a...

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Bibliographische Detailangaben
Hauptverfasser: HAN, Hee Sik, KIM, Geon Ryong, JANG, Jee Eun, LEE, Doohee, KIM, Yoohan, SONG, Nok Jung
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
BASIC ELECTRIC ELEMENTS
ELECTRICITY
LAYERED PRODUCTS
LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
PERFORMING OPERATIONS
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR
SHAPING OR JOINING OF PLASTICS
TRANSPORTING
WORKING OF PLASTICS
WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Zusammenfassung:Disclosed is a cell pouch film, comprising at least an outer layer, a barrier layer, and a sealant layer structured in that order, wherein the sealant layer is formed by extrusion on the barrier layer, wherein the sealant layer has a glass transition temperature (Tg) of -10°C to -7°C, and wherein a crystallinity of the sealant layer is 28% to 32%, a preparation method thereof, a secondary battery using the cell pouch film, and a manufacturing method for the secondary battery. The sealing strength of the pouch film may be maintained or increased at high temperatures, thereby providing excellent high-temperature stability, which prevents electrolyte leakage during battery use in high-temperature environments and ensures battery safety with fewer defects.