SECONDARY BATTERY CURRENT COLLECTOR COPPER ALLOY ROLLED FOIL AND METHOD FOR PRODUCING THE SAME

• Main Authors: KANEKO HIROSHI, MITANI YOJI, IGARASHI MINORU, KUSAMA TOMOE, EGUCHI TATEHIKO
• Format: Patent
• Language: English; Japanese
• Published: 29.01.2015
• Subjects: ALLOYS; BASIC ELECTRIC ELEMENTS; CABLES; CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; CHEMISTRY; CONDUCTORS; ELECTRICITY; FERROUS OR NON-FERROUS ALLOYS; INSULATORS; METALLURGY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES; TREATMENT OF ALLOYS OR NON-FERROUS METALS

PROBLEM TO BE SOLVED: To provide a secondary battery current collector copper alloy rolled foil that is difficult to be plastic-deformed or be broken because of its high strength (proof strength), furthermore that is also excellent in heat tolerance after heating at 300°C (heating time of one hour) and that has also a high conductivity and can improve the yield during the manufacturing process of battery or the like, and the electrical properties, and to provide a method for producing the same.SOLUTION: A secondary battery current collector copper alloy rolled foil is a copper alloy rolled foil obtained from Cu-Cr-based alloy, formed by rolling, and in which, regarding the crystal orientation of the copper alloy rolled foil, when the crystal orientation densities oriented to Brass orientation {110} , Copper orientation {121} , S orientation {231} , and Goss orientation {110} are respectively denoted as B, C, S, and G, then [B/C/(G+S)] is 0.16 or more. A method for producing the same is also provided. 【課題】強度（耐力）が高いために塑性変形や破断し難く、更に３００℃加熱後（加熱時間１時間）の耐熱性にも優れ、かつ導電性も高くて、電池等の製造工程の歩留および電気的特性を向上させることができる二次電池集電体用銅合金圧延箔およびその製造方法を提供する。【解決手段】圧延により形成したＣｕ−Ｃｒ系合金から得られる銅合金圧延箔であって、前記銅合金圧延箔の結晶方位について、Ｂｒａｓｓ方位｛１１０｝＜１１２＞、Ｃｏｐｐｅｒ方位｛１２１｝＜１１１＞、Ｓ方位｛２３１｝＜３４６＞、Ｇｏｓｓ方位｛１１０｝＜００１＞に配向している結晶方位密度をそれぞれＢ、Ｃ、Ｓ、Ｇとしたとき、［Ｂ／Ｃ／（Ｇ＋Ｓ）］が、０．１６以上である二次電池集電体用銅合金圧延箔、およびその製造方法。【選択図】なし