| 摘要 |
In a fuel cell system a specific connection (30) and a valve arrangement (24, 26, 28) make it possible for a compressor (12) to supply precompressed air to a fuel cell stack (10) via a waste gas line (20), said air then leaving the fuel cell stack (10) via a line which is otherwise an air feed line (18). In this way, a humidifier (14) may be bypassed. This is sensible in particular during a start phase at low ambient temperatures, during which the fuel cell system is intended to warm up without moisture in the fuel cell stack having a negative effect, for instance by freezing. The compressor (12) may be operated both in the start phase or stop phase and during conventional operation by the same mode of operation. |
