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    • 20. 发明授权
    • Lithium secondary battery
    • 锂二次电池
    • US08101295B2
    • 2012-01-24
    • US12056559
    • 2008-03-27
    • Shouichiro SawaTaizou SunanoMaruo Kamino
    • Shouichiro SawaTaizou SunanoMaruo Kamino
    • H01M6/10H01M2/02H01M2/18
    • H01M10/0587H01M4/0404H01M4/0435H01M4/131H01M4/133H01M4/1391H01M4/1393H01M4/622H01M4/625H01M4/661H01M10/0431H01M10/052H01M10/0525Y02T10/7011
    • A lithium secondary battery has a wound electrode assembly (5). The wound electrode assembly (5) has a negative electrode (2) having a negative electrode active material layer containing a negative electrode active material capable of alloying with lithium and having a filling density of 2.0 g/cc or less, a positive electrode (1) having a positive electrode active material layer containing a positive electrode active material made of a transition metal composite oxide, a separator (3) disposed between the positive and negative electrodes and having a penetration resistance of 500 g or greater, and a cylindrical hollow space (14) at a winding axis and in the vicinity thereof, wherein the positive electrode (1), the negative electrode (2), and the separator (3) are spirally wound. A columnar center pin (15) having a diameter of from 75% to 95% of the diameter of the hollow space is disposed in the hollow space.
    • 锂二次电池具有卷绕电极组件(5)。 卷绕电极组件(5)具有负极(2),其具有负极活性物质层,负极活性物质层含有与锂合金化的负极活性物质,填充密度为2.0g / cc以下,正极(1 ),其具有含有由过渡金属复合氧化物构成的正极活性物质的正极活性物质层,设置在正极和负极之间并具有500g以上的耐渗透性的隔膜(3)和圆筒状中空空间 (14)在卷绕轴及其附近,其中正极(1),负极(2)和隔板(3)螺旋卷绕。 具有中空空间直径的75%至95%直径的柱状中心销(15)设置在中空空间中。