This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Development of System Control for Fuel Cell Rapid Warm-Up Operation
Technical Paper
2012-08-0508
Sector:
Language:
Japanese
Abstract
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°C.