Development of System Control for Fuel Cell Rapid Warm-up Operation below Freezing

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  • Naganuma Yoshiaki
    トヨタ自動車（株）FC 技術部 FC 車両システム設計室
  • Imanishi Hiroyuki
    トヨタ自動車（株）FC 技術部 FC 車両システム設計室
  • Manabe Kota
    トヨタ自動車（株）FC 技術部 FC 車両システム設計室
  • Nonobe Yasuhiro
    トヨタ自動車（株）FC 技術部 FC 車両システム設計室

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  • 氷点下環境での燃料電池急速暖機制御の開発
  • ヒョウテン カ カンキョウ デ ノ ネンリョウ デンチ キュウソクダンキ セイギョ ノ カイハツ

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Cold weather operation has been a major issue for fuel cell vehicles (FCV). To counteract the effects of low temperatures on FCV operation, an approach for rapid warm-up operation based on concentration overvoltage increase and conversion efficiency decrease by limiting oxygen or hydrogen supply was adopted. In order to suppress increases in waste hydrogen concentration due to pumping hydrogen during rapid warm-up, dilution control using bypass air and reduction of concentration overvoltage by a minimum voltage guard were implemented. These approaches effectively control waste heat generation and suppress waste hydrogen concentrations during cold start and warm-up. These developments were incorporated into the 2008 Toyota FCHV-adv and it was confirmed that the rapid warm-up operation strategy allowed the FCHV-adv to be successfully and repeatedly started at -30℃.

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