DEVICE FOR SUPPLYING FUEL TO THE FUEL CELL OF A FUEL CELL SYSTEM AND FUEL CELL SYSTEM

摘要

The invention relates to a fuel cell system having a fuel cell and to a device for supplying fuel to the fuel cell, said device having a fuel supply line and a water supply line. Said device also has a device for generating/preparing the fuel. The device for supplying the fuel has a double pump, in which the feedstock for the fuel that is stored in a fuel tank, for instance methanol, and water that is fed to the water supply line via a partial line, said water being for instance process water produced during the fuel cell process, are mixed to form a fuel/water mixture. Said fuel/water mixture is temporarily stored in an intermediate tank before it is fed to the device for generating/preparing the fuel. In order to variably regulate the fuel/water mixture, bypass lines for the water or fuel are also provided for the purpose of bypassing the double pump and the intermediate tank, separate pumps being provided therein. Additional water or fuel can be directly fed into the device via the bypass lines if a temporary and brief change of the fuel/water mixture is needed.