| 摘要 |
The invention relates to fuel cells that are operated with liquid, vaporous, or gaseous fuels or fuel mixtures, the electric power generated in the fuel cell (BZ) being immediately supplied to a parallel electrical energy store or a device which can receive the entire electric power any time, especially during a regulation process. The method described herein allows the supplied power to be regulated in such a way that the maximum power can be drawn or a maximum efficiency can be achieved regardless of the fuel concentration in the individual cell, cell stack, or parts thereof. Said optimal operating point is reached exactly at the time that the current-voltage characteristic of the individual cell or stack changes from the ohmic range into the range with limited conveyance of material due to the drop in voltage above the membrane. The inventive method eliminates the effort required to control fuel delivery and/or air or oxygen delivery. Furthermore, the inventive regulation process allows methods to be supported and improved which aim to accurately deliver fuel. |
