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    • 2. 发明申请
    • FUEL CELL SYSTEM AND METHOD FOR REGULATING A FUEL CELL SYSTEM
    • 燃料电池系统及其控制方法的燃料电池系统
    • WO2008116579A3
    • 2009-04-30
    • PCT/EP2008002154
    • 2008-03-18
    • FORSCHUNGSZENTRUM JUELICH GMBHMUELLER MARTINMAINTZ ANDREASWILHELM JOERGJANSEN HOLGERSTOLTEN DETLEF
    • MUELLER MARTINMAINTZ ANDREASWILHELM JOERGJANSEN HOLGERSTOLTEN DETLEF
    • H01M8/04H01M16/00
    • H01M16/006H01M8/04365H01M8/0438H01M8/0444H01M8/04492H01M8/04559H01M8/0488H01M8/0491
    • The invention relates to a method for regulating a fuel cell voltage UBZ,ist in a fuel cell system, comprising a fuel cell (1), a DC/DC converter (2) coupled to the fuel cell (1) and adapted to be coupled to an energy store (3), and a control/regulation unit (4) arranged between the fuel cell (1) and the DC/DC converter (2). The method comprises the following steps: A minimum voltage value UBZ,min is determined and UBZ, Sollis selected in such a manner that UBZ, Soll =UBZ,min. The control/regulation unit (4) receives the regulating variable UBZ,ist,compares the regulating variable UBZ,ist with a predetermined desired value UBZ, SolI and determines a correcting variable IDC/DC,SoII therefrom. The control/regulation unit (4) forwards the correcting variable IDC/DC,SoII to the DC/DC converter (2). The DC/DC converter (2) impinges the fuel cell (2) with the current IBZ,ist,which limits the fuel cell voltage, depending on the correcting variable IDC/DC,SoII. The invention also relates to a fuel cell system.
    • 本发明涉及一种用于控制燃料电池电压UBZ是在包含(1),一个向燃料电池(1)连接的DC / DC转换器(2),其可耦合到能量存储装置(3)的燃料电池的燃料电池系统, 和燃料电池(1)和DC / DC转换器(2)之间的一个设置控制单元(4),包括以下步骤:有一个最小电压值UBZ,分钟确定并UBZ,目标选择,使得适用UBZ 中,设置= UBZ,分钟。 的控制和调节单元(4)接收到的控制变量是UBZ比较受控变量UBZ是与预定的期望尺寸UBZ,独奏并且确定一个操纵变量IDC / DC,SoII。 的控制和调节单元(4)导出的操纵变量IDC / DC,SoII到DC / DC转换器(2)上,在依赖收取操纵变量IDC / DC的直流/直流转换器(2),SoII燃料电池 (2)被连接到电流IBZ这限制了燃料电池的电压。 此外,本发明涉及一种燃料电池系统。
    • 5. 发明申请
    • EXHAUST GAS PURIFICATION SYSTEM FOR A FUEL CELL OR A FUEL CELL STACK
    • 排放控制燃料电池或 燃料电池堆
    • WO2008110138A2
    • 2008-09-18
    • PCT/DE2008000368
    • 2008-03-01
    • FORSCHUNGSZENTRUM JUELICH GMBHSTAEHLER MARKUSMUELLER MARTIN
    • STAEHLER MARKUSMUELLER MARTIN
    • H01M8/06
    • H01M8/1011H01M8/0662H01M8/1013H01M16/003H01M2008/1095Y02E60/522Y02E60/523
    • The invention relates to a fuel cell or a fuel cell stack, wherein a means for reducing the concentration of non-reacted alcohol is disposed on the cathode exhaust gas side. Said means particularly comprises an additional electrochemical cell, to which a voltage is applied, and the at least partially non-reacted alcohol is converted by an electrochemical reaction into CO 2 and hydrogen and/or water. Because the concentration of non-reacted alcohol is generally small, the loss of current required for the additional reduction reaction does not result in any notable impairment of the efficiency of the fuel cell stack. The invention is thus not limited to only direct methanol fuel cells; rather, it may be applied in an analog fashion to high-temperature fuel cells, particularly high-temperature PEM fuel cells, in which the additional electrochemical cell disposed on the cathode exhaust gas side is advantageously able to convert the remaining CO.
    • 本发明涉及一种燃料电池或其中减少的浓度的装置被设置未反应的醇的到阴极排气侧的燃料电池堆。 这特别是指由一个进一步的电化学电池的被施加的电压,并且至少部分地由在CO电化学还原反应 2 和氢或水的未反应的醇进行转换。 由于未反应的醇的浓度通常较小,的电流的损失导致需要额外的还原反应,在燃料电池堆的效率没有显著损害。 但本发明并不仅限于直接甲醇燃料电池中,而是通过类推适用于高温燃料电池,特别是高温PEM燃料电池,其中,布置在所述阴极排气侧进一步电化学电池可以有利地实现残留CO。