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    • 1. 发明申请
    • CYLINDRICAL NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY
    • 圆柱形非水电解质二次电池
    • US20100233524A1
    • 2010-09-16
    • US12675296
    • 2009-05-26
    • Yasuhiko HinaAkira NagasakiTetsu Hashimoto
    • Yasuhiko HinaAkira NagasakiTetsu Hashimoto
    • H01M10/04H01M2/02
    • H01M2/0225H01M2/022H01M2/26H01M4/13H01M10/04H01M10/052H01M10/058H01M2010/4292
    • A cylindrical non-aqueous electrolyte secondary battery of the invention includes: an approximately columnar electrode group having a strip-shaped positive electrode including a positive electrode material mixture layer formed on a positive electrode current collector and a strip-shaped negative electrode including a negative electrode material mixture layer formed on a negative electrode current collector that are spirally wound with a strip-shaped separator interposed therebetween; a non-aqueous electrolyte; a bottomed cylindrical battery case housing the electrode group and the non-aqueous electrolyte; and a negative electrode lead electrically connecting the negative electrode and the battery case. The negative electrode includes a double-coated portion having a negative electrode material mixture layer formed on both surfaces of the negative electrode current collector, a single-coated portion having a negative electrode material mixture layer formed on one surface of the negative electrode current collector, and an uncoated portion where both surfaces of the negative electrode current collector are exposed. The single-coated and uncoated portions are disposed at an outermost layer of the electrode group. The negative electrode current collector exposed portions of the single-coated and uncoated portions are in direct contact with an inner surface of the battery case.
    • 本发明的圆柱形非水电解质二次电池包括:具有带状正极的近似柱状电极组,其包括在正极集电体上形成的正极合剂层和包含负极的带状负极 形成在负极集电体上的材料混合物层,其间插入有带状隔板螺旋卷绕; 非水电解质; 容纳电极组和非水电解质的有底圆筒形电池盒; 以及将负极和电池壳体电连接的负极引线。 负极包括在负极集电体的两面形成负极材料混合层的双面涂布部,在负极集电体的一个面上形成有负极复合材料层的单涂层部, 以及露出负极集电体的两面的未涂布部。 单涂层和未涂覆部分设置在电极组的最外层。 单涂层和未涂覆部分的负电极集电体露出部分与电池壳体的内表面直接接触。
    • 5. 发明申请
    • CHARGING METHOD AND CHARGING/DISCHARGING METHOD OF LITHIUM ION SECONDARY BATTERY
    • 锂离子二次电池的充电方法和充电/放电方法
    • US20100207583A1
    • 2010-08-19
    • US12680095
    • 2009-03-26
    • Ryoichi TanakaYasuhiko HinaAkira Nagasaki
    • Ryoichi TanakaYasuhiko HinaAkira Nagasaki
    • H02J7/00H02J7/04
    • H01M10/0525H01M4/525H01M10/44H02J7/0073
    • The present invention relates to a charging method of a lithium ion secondary battery including, as a positive electrode active material, a lithium-containing composite oxide containing nickel and cobalt and having a layered crystal structure. The charging method includes a first step of charging the battery at a first current of 0.5 to 0.7 It until the charge voltage of the battery reaches a first upper limit voltage of 3.8 to 4.0 V; a second step of charging the battery, upon completion of the first step, at a second current smaller than the first current until the charge voltage of the battery reaches a second upper limit voltage greater than the first upper limit voltage; and a third step of charging the battery, upon completion of the second step, at the second upper limit voltage. This provides a charging method of a lithium ion secondary battery, the method capable of achieving both a shortened charging time and an improvement in charge/discharge cycle life characteristics.
    • 本发明涉及一种锂离子二次电池的充电方法,其包括含有镍和钴并具有层状晶体结构的含锂复合氧化物作为正极活性物质。 充电方法包括以0.5至0.7的第一电流对电池充电的第一步骤,直到电池的充电电压达到3.8至4.0V的第一上限电压; 第二步骤,在第一步骤完成时,以小于第一电流的第二电流进行充电,直到电池的充电电压达到大于第一上限电压的第二上限电压; 以及在第二步骤完成时,在第二上限电压下对电池充电的第三步骤。 这提供了一种锂离子二次电池的充电方法,该方法能够缩短充电时间并提高充放电循环寿命特性。
    • 8. 发明申请
    • METHOD OF CHARGING NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, AND BATTERY PACK
    • 非水电解二次电池充电方法及电池组
    • US20120133338A1
    • 2012-05-31
    • US13388636
    • 2010-12-02
    • Tatsuhiko SuzukiAkira Nagasaki
    • Tatsuhiko SuzukiAkira Nagasaki
    • H02J7/00
    • H01M10/44H01M4/525H01M10/052H02J7/0073Y02E60/122
    • In the present method, a non-aqueous electrolyte secondary battery is charged by repeating n+1 times a constant current charge and a subsequent constant voltage charge, where n is an integer of 1 or more. (1) An nth charge comprises charging the secondary battery at a current Ic(n) to a voltage Ec(n), and subsequently charging the secondary battery at the voltage Ec(n) until the current decreases from Ic(n) to Ic(n+1). (2) An (n+1)th charge comprises charging the secondary battery at the current Ic(n+1) to a voltage Ec(n+1), and subsequently charging the secondary battery at the voltage Ec(n+1) until the current decreases from Ic(n+1) to Ic(n+2). Consequently, the charge time of the non-aqueous electrolyte secondary battery can be shortened while deterioration of the battery can be suppressed.
    • 在本方法中,非水电解质二次电池通过重复n + 1次恒定电流充电和随后的恒定电压充电而充电,其中n为1以上的整数。 (1)第n个电荷包括以电流Ic(n)将二次电池充电到电压Ec(n),然后以电压Ec(n)对二次电池充电直到电流从Ic(n)减小到Ic (n + 1)。 (2)第(n + 1)次充电包括以电流Ic(n + 1)将二次电池充电至电压Ec(n + 1),然后以电压Ec(n + 1)对二次电池充电, 直到电流从Ic(n + 1)减小到Ic(n + 2)。 因此,可以缩短非水电解质二次电池的充电时间,同时可以抑制电池的劣化。
    • 10. 发明申请
    • LITHIUM ION SECONDARY BATTERY CHARGING METHOD AND BATTERY PACK
    • 锂离子二次电池充电方法和电池组
    • US20110316487A1
    • 2011-12-29
    • US13254410
    • 2010-11-26
    • Haruya NakaiRyouichi TanakaAkira Nagasaki
    • Haruya NakaiRyouichi TanakaAkira Nagasaki
    • H02J7/00
    • H01M10/48H01M4/485H01M4/525H01M2200/103
    • A lithium ion secondary battery which includes: a power generation element including a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte; a case accommodating the power generation element and having an opening; and a sealing plate sealing the opening of the case is charged. The sealing plate has an external terminal of the positive or negative electrode, and an internal terminal electrically connected to the positive or negative electrode. The external and internal terminals are connected to each other and have an electrical resistance therebetween of 0.1 to 2 mΩ. Two or more constant-current charging steps in each of which the secondary battery is charged at a constant charge current until a charge voltage reaches an end-of-charge voltage are performed. In the two or more constant-current charging steps, the secondary battery is subjected to constant-current charging at a current Ic(1) of 1 to 5 C until the charge voltage reaches a target voltage Ecs(1). After the charge voltage reached the target voltage Ecs(1), the secondary battery is subjected to constant-current charging at a current Ic(k) satisfying Ic(k)
    • 一种锂离子二次电池,包括:发电元件,其包括正电极,负电极,插入在所述正电极和所述负极之间的隔膜和非水电解质; 容纳所述发电元件并具有开口的壳体; 并且密封壳体的开口的密封板被充电。 密封板具有正极或负极的外部端子和与正极或负极电连接的内部端子。 外部和内部端子彼此连接并且其间的电阻为0.1至2mΩ。 在恒定充电电流下对二次电池进行充电,直到充电电压达到充电结束电压为止,进行两个以上的恒流充电步骤。 在两个以上的恒流充电步骤中,二次电池以1〜5C的电流Ic(1)进行恒流充电,直到充电电压达到目标电压Ecs(1)为止。 在充电电压达到目标电压Ecs(1)之后,二次电池以满足Ic(k)