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    • 9. 发明申请
    • Mehotd for determining a maximum power point voltage of a fuel cell, as well as fuel cell control system and power controller used in the fuel cell control system
    • 用于确定燃料电池的最大功率点电压的Mehotd,以及用于燃料电池控制系统中的燃料电池控制系统和功率控制器
    • US20060222916A1
    • 2006-10-05
    • US11354920
    • 2006-02-16
    • Yasuaki NorimatsuAkihiko KanoudaMutsumi Kikuchi
    • Yasuaki NorimatsuAkihiko KanoudaMutsumi Kikuchi
    • H01M8/04G05D11/00
    • H01M8/04007H01M8/04365H01M8/04559H01M8/04567H01M8/04597H01M8/04619H01M8/04626H01M8/0488H01M8/04888H01M8/0494H01M8/04947H01M8/1011H01M2008/1095Y02E60/523
    • A detection voltage, which is obtained by dividing the voltage of a fuel cell 1 by resistors, is compared with a first reference voltage Vref1 by a differential amplifier. The differential voltage is input to a control section. The control section performs PWM control for the circuit section according to the difference. The first reference voltage Vref1 is set according to the dividing ratio of the resistors, based on the output voltage when the fuel cell generates power at the maximum power point. To determine the output voltage for maximum power generation, a characteristic curve representing a current-voltage characteristic is approximated by an approximating line within a range excluding an area in which the output voltage changes abruptly when the output current is nearly zero, and an extrapolated voltage is obtained on the extension line of the approximating line at an output current of zero. Fifty percent of the extrapolated voltage is then determined as the output voltage when the fuel cell generates power at the maximum power point. Thus, a fuel cell control system that identifies a highly precise output voltage for power generation at a maximum power point and controls power so that the maximum power point is not exceeded could be provided.
    • 通过将电阻器将燃料电池1的电压分压而获得的检测电压通过差分放大器与第一基准电压Vref 1进行比较。 差分电压被输入到控制部分。 控制部根据差异对电路部进行PWM控制。 基于当燃料电池在最大功率点发电时的输出电压,根据电阻器的分压比设定第一基准电压Vref 1。 为了确定用于最大发电的输出电压,表示电流 - 电压特性的特性曲线在输出电压几乎为零时输出电压急剧变化的范围内的范围内的近似线近似,并且外推电压 在输出电流为零时在近似线的延长线上获得。 然后将50%的外推电压确定为当燃料电池在最大功率点发电时的输出电压。 因此,可以提供一种燃料电池控制系统,其识别用于在最大功率点发电的高精度输出电压并且控制功率以便不超过最大功率点。