SECONDARY BATTERY POUCH CASE MANUFACTURING METHOD, SECONDARY BATTERY POUCH FILM, AND SECONDARY BATTERY POUCH CASE

The present invention relates to a method for manufacturing a pouch case of a secondary battery, and a pouch film of a secondary battery and a pouch case of a secondary battery. During a process of manufacturing a pouch case by forming a pouch film, an elongation rate can be measured by the color of...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	CHOI, Yang Lim, KIM, Kyoung Ha
Format:	Patent
Sprache:	eng ; fre ; ger
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 TRANSPORTING
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Beschreibung
Zusammenfassung:	The present invention relates to a method for manufacturing a pouch case of a secondary battery, and a pouch film of a secondary battery and a pouch case of a secondary battery. During a process of manufacturing a pouch case by forming a pouch film, an elongation rate can be measured by the color of an outer layer of the pouch film without separate sampling, and it can be determined whether or not elongation has occurred which causes a critical level in which a crack is about to occur or a defective level in which a crack is occurring.A method for manufacturing a pouch case of a secondary battery according to the present invention includes: stacking a metal layer above an inner layer and stacking an outer layer, which includes colored dye particles, above the metal layer, thereby producing a pouch film; forming the pouch film into a three-dimensional shape so that an electrode assembly is accommodated therein; and measuring an elongation rate of the pouch film through color of the outer layer.