This recommended practice is intended to serve as a procedure to verify the functional performance, design specifications or vendor claims of any PEM (Proton Exchange Membrane) type fuel cell stack sub-system for automotive applications. In this document, definitions, specifications, and methods for the functional performance characterization of the fuel cell stack sub-system are provided. The functional performance characterization includes evaluating electrical outputs and controlling fluid inputs and outputs based on the test boundary defined in this document.In this document, a fuel cell stack sub-system is defined to include the following:Fuel cell stack(s) – An assembly of membrane electrode assemblies (MEA), current collectors, separator plates, cooling plates, manifolds, and a supporting structure.Connections for conducting fuels, oxidants, cooling media, inert gases and exhausts.Electrical connections for the power delivered by the stack sub-system.Devices for monitoring electrical loads.Devices for monitoring cell voltage.Humidification devices.Instrumentation for detecting normal and/or abnormal operating conditions.Enclosures (that may qualify as pressure vessels), and ventilation systems for the enclosure.Not included in the sub-system are the following:Fuel and air processorsThermal management systemPower conditioner and distributorControllersThe committee cannot find users for the technical report.
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