摘要

In this paper, a service life evaluation method for vehicular PEM fuel cell - fuel cell economical lifetime is proposed with its math model set up. Fuel cell economical lifetime is defined as the service time of fuel cell when its average service cost (total cost, i.e. the manufacture cost plus the consumption costs of fuel and accessory devices divided by service time) is minimum. When fuel cell reaches its economical lifetime, its membrane-electrode assembly is renewed and the fuel cell enters its second life cycle. The results of analysis indicate that both the average service cost and corresponding economical lifetime in second life cycle is slightly less than those in first life cycle. Finally the effects of factors including hydrogen price and fuel cell decay rate on the economical lifetime of fuel cell are analyzed.