• Patent Title: Fuel cell system and method of operating a fuel cell system
  • Application No.: US12743158
    Application Date: 2008-11-07
  • Publication No.: US08173308B2
    Publication Date: 2012-05-08
  • Inventor: Hans-Joerg Heidrich
  • Applicant: Hans-Joerg Heidrich
  • Applicant Address: DE Stuttgart
  • Assignee: Daimler AG
  • Current Assignee: Daimler AG
  • Current Assignee Address: DE Stuttgart
  • Agency: Crowell & Moring LLP
  • Priority: DE102007054826 20071116
  • International Application: PCT/EP2008/009402 WO 20081107
  • International Announcement: WO2009/062636 WO 20090522
  • Main IPC: H01M8/04
  • IPC: H01M8/04 H01M8/06
Fuel cell system and method of operating a fuel cell system
Abstract:
In a fuel cell system a specific connection and a valve arrangement make it possible for a compressor to supply precompressed air to a fuel cell stack via a waste gas line, said air then leaving the fuel cell stack via a line which is otherwise an air feed line. In this way, a humidifier 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 may be operated both in the start phase or stop phase and during conventional operation by the same mode of operation.
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