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    • 4. 发明授权
    • Non-aqueous electrolytic solution secondary battery
    • 非水电解液二次电池
    • US06803149B2
    • 2004-10-12
    • US09977214
    • 2001-10-16
    • Kenji NakaiYoshimasa KoishikawaYoushin YagiKensuke Hironaka
    • Kenji NakaiYoshimasa KoishikawaYoushin YagiKensuke Hironaka
    • H01M450
    • H01M4/505H01M2/12H01M2/1241H01M2/20H01M4/131H01M4/133H01M4/485H01M4/587H01M6/10H01M10/0525H01M2004/021H01M2010/4292
    • The present invention is to provide a non-aqueous electrolytic solution secondary battery which has high safety while maintaining high capacity and high power. A cylindrical lithium-ion battery 20 is provided in a battery lid which is a portion of a battery container with a cleavage valve 11 which cleaves at a predetermined pressure, and includes an electrode winding group 6 prepared by winding a positive electrode, a negative electrode and a separator, connection portions for connecting the electrode winding group 6 to respective electrode terminals, and non-aqueous electrolytic solution therein. As a positive electrode active material, lithium manganate where the amount of elution of manganese into the non-aqueous electrolytic solution is 5% or less based on the lithium manganate in a region where an electrode potential to metal lithium is 4.8V or more is used. As a negative electrode active material, graphite in/from which lithium ions can be occluded/released according to charging and discharging is used.
    • 本发明提供一种保持高容量,高功率的高安全性的非水电解液二次电池。 圆筒形锂离子电池20设置在电池盖中,该电池盖是具有在预定压力下切割的切割阀11的电池容器的一部分,并且包括通过卷绕正电极,负极 以及分离器,用于将电极绕组6连接到各个电极端子的连接部分和其中的非水电解液。 作为正极活性物质,使用其中非电解电解液中锰析出量相对于金属锂的电极电位为4.8V以上的区域中的锰酸锂为5%以下的锰酸锂 。 作为负极活性物质,使用可以根据充放电使锂离子被吸留/释放的石墨。
    • 5. 发明授权
    • Cylindrical lithium-ion battery
    • 圆柱形锂离子电池
    • US06509114B1
    • 2003-01-21
    • US09525263
    • 2000-03-14
    • Kenji NakaiTakeshi NakanoKensuke Hironaka
    • Kenji NakaiTakeshi NakanoKensuke Hironaka
    • H01M400
    • H01M10/0431H01M4/505H01M4/587H01M10/0525H01M10/0587Y02T10/7011
    • A cylindrical lithium-ion battery with excellent safety where abnormal heat generation and remarkable deformation of a battery container do not occur even at an abnormal time is provided. When an average diameter of a winding group 6 is A mm, an inner diameter of the battery container 5 is B mm, a longitudinal length of the winding group 6 except for lead pieces extending from the winding group 6 is H mm, and the number of windings where a layer of one unit comprising a negative electrode member/separator/negative electrode member/separator is wound around a shaft core 11 is W, a calculation value K obtained by a formula; K=(B−A)×(10000/(W×H) is set to 0.89 or more. When the calculation value K is 0.89 or more, a gap (B−A) between an outer periphery of the winding group 6 and an inner periphery of the battery container 5 that enables the winding group 6 to expand in its diameter direction at an abnormal time is properly secured.
    • 提供了即使在异常时也不会发生具有优异安全性的圆柱形锂离子电池,其中异常发热和电池容器的显着变形。 当卷绕组6的平均直径为Amm时,电池容器5的内径为Bmm,除了从卷绕组6延伸的引线片以外的卷绕组6的纵向长度为Hmm, 其中包括负极构件/隔板/负极构件/隔板的一个单元的层缠绕在轴芯11上的绕组是W,通过公式获得的计算值K; K =(BA)×(10000 /(W×H))为0.89以上,当计算值K为0.89以上时,卷绕组6的外周与电池内周之间的间隙(BA) 适当地确保使绕组6在异常时沿其直径方向膨胀的容器5。
    • 6. 发明授权
    • Lithium secondary battery
    • 锂二次电池
    • US06506518B1
    • 2003-01-14
    • US09525264
    • 2000-03-14
    • Koutaro KobayashiYoshimasa KoishikawaKensuke Hironaka
    • Koutaro KobayashiYoshimasa KoishikawaKensuke Hironaka
    • H01M458
    • H01M4/505H01M4/133H01M4/587H01M10/0525H01M2010/4292Y02T10/7011Y10T29/49108Y10T29/49115
    • A lithium secondary battery capable of improving high temperature cycle life characteristic effectively without decreasing discharge capacity. Amorphous carbon powder with a specific surface area of 10.0 m2/g and a mean particle diameter of 7.0 &mgr;m is used as negative electrode active material and lithium manganate with a Li/Mn ratio of 0.58 is used as positive electrode active material. Since a surface area of the negative electrode active material layer is made large by setting the mean particle diameter of the amorphous carbon powder to 10 &mgr;m or less, the surface area of the negative electrode active material layer is sufficiently large that, even when inert coating is formed on the surface of the negative electrode due to manganese deposition caused by manganese elution from the positive electrode, high temperature cycle life characteristic can be improved without high temperature deterioration.
    • 能够有效地提高高温循环寿命特性而不降低放电容量的锂二次电池。 使用比表面积为10.0m 2 / g,平均粒径为7.0μm的无定形碳粉末作为负极活性物质,Li / Mn比为0.58的锰酸锂用作正极活性物质。 由于通过将非晶碳粉末的平均粒径设定为10μm以下,使负极活性物质层的表面积变大,所以负极活性物质层的表面积足够大,即使在惰性涂布 由于由正极中的锰洗脱引起的锰沉积而形成在负极的表面上,可以提高高温循环寿命特性,而不会导致高温劣化。