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    • 4. 发明授权
    • Fast search algorithm for finding initial diffusion voltage in electro-chemical systems
    • 用于在电化学系统中寻找初始扩散电压的快速搜索算法
    • US08054046B2
    • 2011-11-08
    • US12018653
    • 2008-01-23
    • Jian LinBrian J. KochDamon R. FrischMichael J. Gielniak
    • Jian LinBrian J. KochDamon R. FrischMichael J. Gielniak
    • H02J7/04
    • B60L11/1851B60L2210/20G01R31/362G01R31/3651H01M10/441H01M10/482Y02T10/7005Y02T10/705Y02T10/725Y10S903/903
    • A method for rapidly determining an initial diffusion voltage (Vdiff)initial as a starting point in calculating a diffusion voltage in an electro-chemical cell (e.g., a battery used in an automotive vehicle) includes obtaining a time difference toff between a time when the cell was last turned-OFF and a time when the cell was next turned-ON, selecting a starting diffusion voltage (Vdiff)start based on toff, determining a trial diffusion voltage Vdiff based on a diffusion circuit model and (Vdiff)start, calculating an error voltage Verror=(Vdiff)−|VOFF−VON| where VOFF and VON are cell voltages at turn-OFF and turn-ON respectively, repeating the foregoing determining and calculating steps using for each iteration (Vdiff)start=(Vdiff)previous+Verror until Verror is less than or equal to a first predetermined tolerance amount ε, storing in a memory a value of Vdiff corresponding to the condition Verror≦ε, and setting (Vdiff)initial equal to the just stored value of Vdiff. A further diffusion voltage Vdiff is then determined using the same diffusion circuit model and the just obtained (Vdiff)initial and is advantageously used by a controller in an electric propulsion vehicle to determine a state of charge of the propulsion battery.
    • 一种用于在计算电化学电池(例如,汽车中使用的电池)中的扩散电压的初始点的初始扩散电压(Vdiff)初始化的起始点的方法包括获得时间差toff, 电池最后关闭,电池下一次接通的时间,基于toff选择起始扩散电压(Vdiff)开始,基于扩散电路模型确定试验扩散电压Vdiff(Vdiff)开始,计算 误差电压Verror =(Vdiff) - | VOFF-VON | 其中VOFF和VON分别是关断和导通时的电池电压,重复上述确定和计算步骤,用于每次迭代(Vdiff)开始=(Vdiff)先前+ Verror,直到Verror小于或等于第一预定 容许量&egr;在存储器中存储与条件Verror≦̸&egr相对应的Vdiff的值,以及设置(Vdiff)初始值等于刚刚存储的Vdiff值。 然后使用相同的扩散电路模型和刚刚获得的(Vdiff)初始值确定另外的扩散电压Vdiff,并且有利地由电动推进车辆中的控制器使用以确定推进电池的充电状态。