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    • 3. 发明授权
    • Nickel-metal hydride storage cell having a high capacity and an excellent cycle characteristic and manufacturing
    • 具有高容量和优异的循环特性和制造的镍氢蓄电池
    • US06368748B1
    • 2002-04-09
    • US09531600
    • 2000-03-20
    • Masao TakeeMotoo TadokoroTadashi IseAkifumi Yamawaki
    • Masao TakeeMotoo TadokoroTadashi IseAkifumi Yamawaki
    • H01M452
    • H01M10/345H01M4/32H01M4/52H01M10/30
    • A nickel-metal hydride storage cell is composed of a non-sintered positive electrode which is filled with a nickel active material whose particles are coated with cobalt compound layers of divalent or greater and a metal hydride electrode which is filled with a surface-treated hydrogen-absorbing alloy. In the cell, the positive electrode non-reactive capacity rate (represented by the Equation 1) and the negative electrode charge depth (represented by the Equation 2) after the initial charge/discharge are 16% or lower, and 80% or lower, respectively. This construction makes it possible to take larger actual cell capacity by setting the value of the negative electrode charge depth to the degree which causes no rise in the cell internal pressure, thereby expanding the capacity of the cell. positive electrode non-reactive capacity rate %=(positive electrode theoretical capacity−actual cell capacity)/positive electrode theoretical capacity×100  Eq. 1; negative electrode charge depth %=(negative electrode remaining capacity+actual cell capacity)/negative electrode whole capacity×100  Eq. 2.
    • 镍氢蓄电池由非烧结正电极组成,其中填充有用二价以上的钴化合物层涂覆其颗粒的镍活性材料和填充有表面处理氢的金属氢化物电极 吸收合金。 在电池中,初始充放电后的正极非反应容量率(由式1表示)和负极电荷深度(以式2表示)为16%以下,80%以下, 分别。 这种结构使得可以通过将负极电荷深度的值设定为不使电池内部压力升高的程度来获得更大的实际电池容量,从而扩大电池的容量。
    • 5. 发明授权
    • Nickel electrode for alkaline storage battery and method of manufacturing the same
    • 碱性蓄电池用镍电极及其制造方法
    • US06740449B2
    • 2004-05-25
    • US09813998
    • 2001-03-22
    • Chihiro FujisawaTakuya TamagawaYoichiro Shibata
    • Chihiro FujisawaTakuya TamagawaYoichiro Shibata
    • H01M452
    • H01M4/366H01M4/32H01M4/38
    • A nickel electrode for an alkaline storage battery is made by filling a conductive porous member with an active material including a main active material layer substantially made of nickel hydroxide and containing cobalt in a state of a solid solution, and a compound layer containing at least one element selected from the group consisting of calcium, aluminum, strontium, scandium, yttrium, and lanthanoide series, the compound layer being formed on a surface of the main active material layer. A metal molar ratio of cobalt contained in the main active material layer to nickel contained in the main active material layer is in a range of 0.5% to 3.0%, and a metal molar ratio of the at least one element contained in the compound layer to nickel contained in the active material is in a range of 0.3% to 5.0%.
    • 用于碱性蓄电池的镍电极是通过用活性材料填充导电性多孔构件制成的,所述活性材料包括基本上由氢氧化镍制成的主要活性物质层,并且以固溶体状态含有钴,以及含有至少一种 选自钙,铝,锶,钪,钇和镧系元素的元素,所述化合物层形成在所述主活性物质层的表面上。 主活性物质层中所含的钴与包含在主活性物质层中的镍的金属摩尔比在0.5〜3.0%的范围内,化合物层中含有的至少一种元素的金属摩尔比与 活性物质中所含的镍为0.3〜5.0%的范围。
    • 8. 发明授权
    • Method of forming CoOOH and NiOOH in a NiMH electrochemical cell and an electrochemical cell formed thereby
    • 在NiMH电化学电池中形成CoOOH和NiOOH的方法以及由此形成的电化学电池
    • US06270535B1
    • 2001-08-07
    • US09148176
    • 1998-09-04
    • Deepika B. Singh
    • Deepika B. Singh
    • H01M452
    • H01M4/0447H01M4/52H01M10/288H01M10/345H01M10/44H01M10/446H02J7/0075Y10T29/49108
    • A formation procedure for a NiMH electrochemical cell is disclosed that significantly shortens the time required to fully form such a cell. The formation procedure includes a first step during which the cell is charged at a constant voltage of preferably 1.0 volt for approximately three hours. A second charging step is performed by applying either a constant charge current at a predetermined rate of C/3 for five hours or applying a constant voltage of 1.45 to 1.5 volts for five to nine hours. A third step may optionally be used whereby the cell is charged at a constant current of C/10 for about two hours. NiMH cells subjected to this formation procedure have a much greater percentage of the starting cobalt material in the positive electrode converted to CoOOH thereby improving the conductive matrix formed about the Ni(OH)2/NiOOH particles, which constitute the active material of the positive electrode. The disclosed inventive formation procedures result in higher utilization, higher cell capacities following long-term storage, or storage at high temperatures as well as improved capacity recovery following deep discharge.
    • 公开了一种NiMH电化学电池的形成方法,其显着缩短了完全形成这种电池所需的时间。 形成步骤包括第一步骤,在该步骤中,电池以优选1.0伏的恒定电压充电大约三个小时。 通过以C / 3的预定速率施加恒定充电电流5小时或施加1.45至1.5伏的恒定电压进行5至9小时来执行第二充电步骤。 可以任选地使用第三步骤,由此电池以C / 10的恒定电流充电约2小时。 经过这种形成过程的NiMH电池具有比正转化成CoOOH的起始钴材料的百分比大得多,从而改善了构成正极活性材料的Ni(OH)2 / NiOOH颗粒周围形成的导电基体 。 所公开的本发明形成方法导致更高的利用率,长期储存后的更高的电池容量或在高温下的储存以及在深度放电之后改进的容量恢复。