虽然正在开发各种类型的燃料电池架构，但本文件的重点是质子交换膜（PEM）燃料电池堆和汽车推进应用的辅助组件。本文件的范围包括:燃料供应和储存、燃料处理器、燃料电池组和电厂平衡，如图1所示。

While there are various types of Fuel Cell architectures being developed, the focus of this document is on Proton Exchange Membrane (PEM) fuel cell stacks and ancillary components for automotive propulsion applications. Within the boundaries of this document are the: Fuel Supply and Storage, Fuel Processor, Fuel Cell Stack, and Balance of Plant, as shown in Figure 1.