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    • 1. 发明授权
    • Fuel cell system
    • 燃料电池系统
    • US09240602B2
    • 2016-01-19
    • US12743911
    • 2008-11-11
    • Hiroyuki ImanishiKota ManabeTomoya Ogawa
    • Hiroyuki ImanishiKota ManabeTomoya Ogawa
    • H01M8/04B60L11/18
    • H01M8/04559B60L11/1894B60L2240/545B60L2240/547H01M8/04268H01M8/0488Y02E60/50Y02T90/34
    • Provided is a fuel cell system capable of supplying electric power to external loads without excess or deficiency even when switching occurs between operation states. A warm-up timing judgment part judges whether it is time to operate warm-up based on the temperature of a fuel cell stack. A target shift voltage determination part determines a target output voltage of the fuel cell stack used during a warm-up operation, and a voltage change speed determination part determines a voltage change speed based on electric power required from the fuel cell stack, the target output voltage of the fuel cell stack used during the warm-up operation which is output from the target shift voltage determination part and a current output voltage detected by a voltage sensor. A voltage decrease execution part operates voltage decrease processing according to the voltage change speed indicated by the voltage change speed determination part.
    • 提供一种即使在操作状态之间发生切换的情况下也能够向外部负载提供电力而没有过多或不足的燃料电池系统。 预热定时判断部判断是否有时间基于燃料电池堆的温度进行预热。 目标偏移电压确定部分确定在预热操作期间使用的燃料电池堆的目标输出电压,并且电压变化速度确定部分基于从燃料电池堆所需的电力来确定电压变化速度,目标输出 从目标换档电压判定部输出的预热运转中使用的燃料电池堆的电压和由电压传感器检测出的电流输出电压。 电压降低执行部根据电压变化速度决定部所表示的电压变化速度进行电压降低处理。
    • 5. 发明授权
    • Fuel cell system
    • 燃料电池系统
    • US08460835B2
    • 2013-06-11
    • US12675709
    • 2008-08-22
    • Hiroyuki ImanishiKota ManabeTomoya Ogawa
    • Hiroyuki ImanishiKota ManabeTomoya Ogawa
    • H01M8/04
    • H01M8/0488H01M8/04223H01M8/04225H01M8/04619H01M2250/20Y02T90/32
    • A fuel cell system increases an output voltage of a fuel cell if an electric power generation command value Pref for the fuel cell abruptly reduces while the fuel cell is being warmed up at a low-efficiency operation, which has lower electric power generation efficiency than that of a normal operation. Thus, the surplus electric power Ws corresponding to the difference between an electric power generation amount Pmes of the fuel cell and the electric power generation command value Pref is stored into a capacitive component of the fuel cell, thereby matching the electric power supplied to an external load of the fuel cell (Pmes-Ws) with the electric power generation command value Pref. This makes it possible to conduct control not to supply the surplus electric power to the external load when the electric power required from the fuel cell suddenly reduces during the low-efficiency operation.
    • 如果燃料电池的发电指令值Pref在燃料电池处于低效率运行时被加热的情况下,燃料电池的发电指令值Pref突然降低,则燃料电池系统增加燃料电池的输出电压,其发电效率比其低 的正常操作。 因此,对应于燃料电池的发电量Pmes与发电指令值Pref的差的剩余电力Ws被存储在燃料电池的电容部件中,从而将供给到外部的电力的电力 具有发电指令值Pref的燃料电池(Pmes-Ws)的负载。 这使得当在低效率操作期间当燃料电池所需的电力突然降低时,可以进行不向外部负载供应剩余电力的控制。
    • 7. 发明申请
    • FUEL CELL SYSTEM AND CURRENT CONTROL METHOD OF SAME
    • 燃料电池系统及其电流控制方法
    • US20100136451A1
    • 2010-06-03
    • US12598532
    • 2008-06-27
    • Hiroyuki ImanishiKota ManabeTomoya Ogawa
    • Hiroyuki ImanishiKota ManabeTomoya Ogawa
    • H01M8/04
    • H01M8/04552B60L11/1881B60L11/1887B60L11/1892B60L11/1894H01M8/0491Y02T90/34
    • A control unit 80, when calculating a request current I0 according to a system request electric power Preq and calculating a target current I1 by correcting the request current I0 with PI compensation calculation based on a minimum cell voltage Vm detected by a cell monitor 101, variably changes a proportional gain Kp according to the current value at the present time when calculating a current limit value ΔI as the amount of correction of a request current I0 according to the equation ΔI=ΔV×Kp+ΔΣV×Ki, thereby enhancing controllability to control the current of a fuel cell 20 to a target current value I1. When controlling the current of a fuel cell by determining a target current value by correcting a request current by PI compensation using the difference between a minimum cell voltage and a threshold voltage, controllability to control the current of the fuel cell to the target current value can be enhanced.
    • 控制单元80,当根据系统请求电力Preq计算请求电流I0并且通过基于由单元监视器101检测到的最小单元电压Vm的PI补偿计算来校正请求电流I0来计算目标电流I1时,可变地 根据等式&Dgr计算电流限制值&Dgr; I作为请求电流I0的校正量,根据当前值根据当前值改变比例增益Kp; I =&Dgr; V×Kp +&Dgr;&Sgr ; V×Ki,从而提高了将燃料电池20的电流控制为目标电流值I1的可控性。 当通过使用最小单元电压和阈值电压之间的差校正PI补偿的PI补偿来确定目标电流值来控制燃料电池的电流时,可以将燃料电池的电流控制到目标电流值 加强。