AIR SUPPLY APPARATUS FOR FUEL CELL SYSTEMS, AND FUEL CELL SYSTEM

The invention relates to an air supply device () for fuel cell systems (, ) with a flow compressor and an electric drive motor () for the flow compressor, wherein the flow compressor has two compressor wheels (, ) which are essentially symmetrical and which are arranged, together with the electric drive motor () there between, on a common shaft (). The air supply device according to the invention is characterized in that the two compressor wheels (, ) are connected on the pressure side to two systems (, , , ) which are pneumatically not permanently connected. A fuel cell system (, ) which uses such an air supply device () is also claimed.