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    • 8. 发明申请
    • METHOD FOR CHARGING LITHIUM ION SECONDARY BATTERY
    • 锂离子二次电池充电方法
    • US20140191731A1
    • 2014-07-10
    • US13821497
    • 2012-09-04
    • Kazutoshi Miura
    • Kazutoshi Miura
    • H02J7/00
    • H02J7/0052H01M4/134H01M10/44H02J7/0073H02J7/0091Y02B40/90Y02E70/40
    • CCCV charging is applied to a lithium ion secondary battery. During CC charging, a transition point Ta appears in temperature rise gradient when battery temperature rises along with the charging, and with the transition point Ta being a border, a temperature rise gradient in an initial T1 period is steeper than a temperature rise gradient in a T2 period following the T1 period. Based on charging time tT corresponding to timing at which the transition point Ta appears after start of the CC charging from a condition of the SOC of 0%, changeover time ts is set in a range of tT≦ts≦(tT×1.2). The CC charging is performed at a first current value until changeover time tS elapses after its start, and after the changeover time ts elapses, the CC charging is performed with a second current value larger than the first current value.
    • 将CCCV充电应用于锂离子二次电池。 在CC充电期间,当电池温度随着充电而升高时,转变点Ta出现在温度升高梯度中,并且随着转变点Ta为边界,初始T1周期中的温度升高梯度比在 T1期后T2期。 基于从0%的SOC开始的CC充电开始之后出现转变点Ta的定时的充电时间tT,切换时间ts设定在tT< nlE; ts≦̸(tT×1.2)的范围内。 CC充电以第一电流值进行,直到开始后经过切换时间tS,经过转换时间ts之后,以大于第一电流值的第二电流值进行CC充电。
    • 10. 发明授权
    • Charging algorithm for lithium batteries
    • 锂电池充电算法
    • US08310208B2
    • 2012-11-13
    • US12829362
    • 2010-07-01
    • Surajit Sengupta
    • Surajit Sengupta
    • H01M10/44
    • H02J7/0081Y02B40/90Y02E70/40
    • A method of developing an optimum a lithium battery charging algorithm is conducted by providing a salt dissolved in solvent permitting lithium ions to leave a cathode in large format battery cells. Charge and discharge are then measured under different C-rate conditions. Using the cathode material phase transformations to ascertain a differential curve, peaks in the differential curve are observed with all data plotted against dV/dt and V, where V represents voltage and t represents time. Areas in voltage ranges are then observed where the rate of increase is higher than in other areas. By varying the charging current, an optimum charging voltage can be ascertained and maintained.
    • 通过提供溶解在允许锂离子的溶剂中的盐离开大尺寸电池单元中的阴极来进行开发最佳锂电池充电算法的方法。 然后在不同的C速率条件下测量充放电。 使用阴极材料相变来确定微分曲线,观察到差分曲线中的峰值,所有数据绘制在dV / dt和V上,其中V表示电压,t表示时间。 然后观察电压范围内的区域,其中增加率高于其他区域。 通过改变充电电流,可以确定并保持最佳的充电电压。