METHOD FOR SELECTING LEAD TAB METAL DEFECT OF SECONDARY BATTERY

The present invention relates to a method for screening defects of lead tab metal for a secondary battery, capable of screening lead tab metal defects having exterior stains using a metal surface etching method. The method for screening defects of lead tab metal for a secondary battery comprises the...

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Bibliographische Detailangaben
Hauptverfasser:	HAN MIN GOU, CHO KWANG YEON
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRICITY INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING PHYSICS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY TESTING
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Beschreibung
Zusammenfassung:	The present invention relates to a method for screening defects of lead tab metal for a secondary battery, capable of screening lead tab metal defects having exterior stains using a metal surface etching method. The method for screening defects of lead tab metal for a secondary battery comprises the steps of: (a) preparing a lead tab metal material for screening defects; (b) supporting the lead tab metal material in acid-based chemicals; (c) checking whether the time of being supported in the chemicals reaches a set time; (d) washing the lead tab metal material with distilled water when the time supported in the chemicals reaches the set time; and (e) checking the exterior of the washed lead tab metal material to determine defects. 금속 표면 에칭 방식을 이용하여 외관 얼룩을 갖는 리드탭 금속 불량을 선별할 수 있는 이차전지용 리드탭 금속 불량 선별 방법에 관한 것으로, (a) 불량 선별을 위한 리드탭 금속재를 준비하는 단계, (b) 상기 리드탭 금속재를 산계열의 약품에 담지하는 단계, (c) 상기 약품에 담지된 시간이 설정 시간에 도달하는지를 확인하는 단계, (d) 상기 약품에 담지된 시간이 설정 시간에 도달하면 상기 리드탭 금속재를 증류수로 세척하는 단계, 및 (e) 상기 세척된 리드탭 금속재의 외관을 확인하여 불량을 판단하는 단계를 포함할 수 있다.