An arrangement and method for generating electric power, the arrangement comprising several biocatalytic fuel cell units (1) for generating electric power. The arrangement also comprises one ore more capacitors (2, 3) for balancing and storing the voltage ...

A fuel cell unit (1) and energy storage unit (2) are connected directly together, in parallel.

A power controller has power storage means of storing DC power outputted from DC power generation means that generates DC power; power conversion means including at least a DC/DC converter that converts a voltage when receiving a DC input; charge and disch...

Process for regulating the methanol concentration of a direct methanol fuel cell system having a fuel cell and a separate methanol reservoir comprises varying a first system parameter; and introducing methanol from a methanol reservoir depending on the res...

A limiting device limits voltage, which a fuel cell can make available at maximum. A cell voltage (UBZ) supplied by a fuel cell is plotted in the drawing against current consumption (IBZ). If no limiting device is available, a terminal voltage amounts to U...

Fuel cell system, comprising an auxiliary power source which provides auxiliary power for starting up the fuel cell system and a switch by means of which the fuel cell system can be switched from energy uptake from the auxiliary power source to an energy o...

The electrical energy generating method has a fuel and an oxidizer supplied to one or more fuel cell blocks (16), in which the chemical energy is converted into electrical energy, with fixed feed parameters for the fuel and the oxidizer. Water can be used ...

The performance of a direct feed fuel cell such as, for example, a direct methanol fuel cell, with an anode having a CO-tolerant catalyst, such as a Pt-Ru catalyst, is improved by periodically reducing the output power of the cell to be less than the norma...

A proton exchange membrane fuel cell comprising a proton transmissive membrane, a catalytic anode layer on one face of the membrane, a catalytic cathode layer on the other face of the membrane, and a gas distribution layer on each of the cathode and anode ...