Daimler Ag

Cellcentric Gmbh & Co. Kg

Oliver Harr

Andreas Knoop

Philipp Hausmann

Cosimo Mazzotta

Hans-Joerg Schabel

Patrick L Padgett

Klaus Scherrbacher

Benjamin Pieck

The invention relates to a fuel cell system with at least one fuel cell stack, which comprises an anode chamber and a cathode chamber, with at least one air conveying device for the supply of the cathode chamber with air via a feed air line, with an outlet air line from the cathode chamber, with at least one fuel supply device for the supply of the anode chamber with fuel, with at least one anode circuit for the recirculation of unused fuel around the anode chamber, furthermore with a cathode bypass. The fuel cell system according to the invention is characterized in that the cathode bypass line branches off from the feed air line upstream of or in the region of a valve device in said feed air line, and opens into the outlet air line downstream of or in the region of a further valve device in said outlet air line, wherein a gas jet pump which can be driven by the air which flows around the cathode chamber is arranged in the cathode bypass, which gas jet pump is connected switchably on the suction side to the anode chamber and/or the cathode chamber.

Fuel cell system

A pump has a shaft, an impeller arranged on the shaft, and a labyrinth seal which is arranged between stationary and moving parts of the pump. A plurality of blades are arranged on the rotor and a labyrinth seal extends at least between the shaft and a rear portion of the blades. A gap in the labyrinth seal is designed such that liquid water can be actively carried away, with the labyrinth seal for this purpose being designed at least in places with a channel in the form of a spiral and/or a staircase. The invention also relates to a fuel cell system having such a pump.

Pump and fuel cell system having a pump

Growing community of inventors

Reichenbach, Germany

Oliver Harr