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    • 4. 发明授权
    • Nonaqueous electrolyte secondary battery
    • 非水电解质二次电池
    • US08399113B2
    • 2013-03-19
    • US12596579
    • 2008-04-10
    • Kensuke NakuraHajime NishinoMiyuki NakaiMikinari Shimada
    • Kensuke NakuraHajime NishinoMiyuki NakaiMikinari Shimada
    • H01M10/50H01M2/00
    • H01M10/0525H01M2/1673H01M2/348H01M4/131H01M4/485H01M4/525H01M4/62H01M4/66H01M4/667H01M10/4235H01M2004/021Y02T10/7011
    • An object of the present invention is to provide a high-energy density nonaqueous electrolyte secondary battery that controls the rise in temperature during short circuiting.Used is a nonaqueous electrolyte secondary battery 1, including a battery case 2, and a positive electrode plate 5 having a positive electrode current collector and a positive electrode mixture layer containing a cathode material capable of absorbing and desorbing lithium, a negative electrode plate 6 having a negative electrode current collector and a negative electrode mixture layer containing an anode material capable of absorbing and desorbing lithium, a separator 7 held between the positive and negative electrode plates, and a nonaqueous electrolyte that are enclosed in the battery case, wherein at least one of the positive electrode plate 5 and the negative electrode plate 6 has an electrode plate resistance, as determined in the charged state in the thickness direction when pressurized at 50 kg/cm2, of 0.4 Ω·cm2 or more.
    • 本发明的目的是提供一种控制短路时的温度上升的高能密度非水电解质二次电池。 使用的是具有电池壳体2的非水电解质二次电池1和具有正极集电体的正极板5和含有能够吸收和解吸锂的正极材料的正极合剂层,负极板6具有 含有能够吸收和解吸锂的负极材料的负极集电体和负极混合物层,保持在正极板和负极板之间的隔板7和封入电池壳体中的非水电解质,其中至少一个 正极板5和负极板6的电极板电阻在50kg / cm 2的加压下,在厚度方向的充电状态下测定为0.4Ω·cm 2·cm 2以上。
    • 6. 发明申请
    • LITHIUM ION SECONDARY BATTERY
    • 锂离子二次电池
    • US20090081547A1
    • 2009-03-26
    • US11915781
    • 2006-06-26
    • Kensuke Nakura
    • Kensuke Nakura
    • H01M4/54H01M4/50H01M4/52H01M4/48
    • H01M10/0525H01M4/131H01M4/366H01M4/485H01M4/525H01M10/4235Y02T10/7011
    • The present invention aims to achieve both safety upon shorting by a nail penetration and safety upon overcharging.In a lithium ion secondary battery including a positive electrode, a negative electrode, and a non-aqueous electrolyte, the positive electrode includes active material particles, the active material particles include secondary particles of the lithium composite oxide, and some of the secondary particles have a crack. At least a surface layer portion of the active material particles includes element Me of at least one selected from the group consisting of Mn, Al, Mg, Ca, Zr, B, W, Nb, Ta, In, Mo, and Sn. Element Me is distributed more in the surface layer portion compared with the inner portion of the active material particles.
    • 本发明的目的在于通过钉子穿透来实现短路的安全性和在过充电时的安全性。 在包括正极,负极和非水电解质的锂离子二次电池中,正极包括活性物质粒子,活性物质粒子包括锂复合氧化物的二次粒子,一些二次粒子具有 一个裂缝 至少活性物质粒子的表层部分包含选自Mn,Al,Mg,Ca,Zr,B,W,Nb,Ta,In,Mo和Sn中的至少一种的元素Me。 与活性物质颗粒的内部相比,元素Me更多地分布在表层部分中。
    • 9. 发明申请
    • NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
    • 非电解电解质二次电池
    • US20120088137A1
    • 2012-04-12
    • US13378210
    • 2010-06-24
    • Kensuke Nakura
    • Kensuke Nakura
    • H01M10/0525H01M10/05H01M10/02H01M4/13
    • H01M10/052H01M2/26H01M4/661H01M10/0585H01M10/0587Y02T10/7011
    • A battery case houses an electrode group formed by winding a positive electrode plate where a positive electrode active material layer is provided on a positive electrode current collector and a negative electrode plate where a negative electrode active material layer is provided on a negative electrode current collector with a porous insulating layer interposed therebetween. The current collectors are made of metal foil of an identical material. An end of the positive electrode current collector has a first exposed portion provided with no positive electrode active material layer. An end of the negative electrode current collector has a second exposed portion provided with no negative electrode active material layer. The exposed portions and project from the porous insulating layer in opposite directions. The first and second exposed portions and are connected to positive and negative electrode current collector plates, respectively.
    • 电池壳体容纳通过在正极集电体上设置正极活性物质层的正极板和在负极集电体上设置负极活性物质层的负极板卷绕正极板而形成的电极组, 插入其间的多孔绝缘层。 集电器由相同材料的金属箔制成。 正极集电体的端部具有不具有正极活性物质层的第一露出部。 负极集电体的端部具有不具有负极活性物质层的第二露出部。 暴露部分并从相反方向从多孔绝缘层突出。 第一和第二暴露部分分别连接到正极和负极集电板。