GB/T 24548-2009Fuel cell electric vehicles - Terminology (English PDF)

3.1 General

3.1.1 Fuel cell

power generation device which directly converts external supplied fuel and chemical energy in oxidant to electricity, heat and other reaction products via electrochemical reaction

3.1.9 Purge

the process of emptying high pressure vessel or piping with the help of external conditions

3.1.10 Off gas; tail gas

gas exhausted from fuel cell stack, including unreacted gas, generated gas, and/or inert gas

3.1.11 Gas cleanup

the process of removing impurities in gas by use of physical methods or chemical methods

3.1.12 Hydrogen embrittlement

phenomenon of which lattice is strained and increased after hydrogen atom goes into metal, so as to weaken toughness and ductility and cause embrittlement

3.1.20 Output characteristics

characteristics of the relation between fuel cell voltage and current

3.2.2 Auxiliary system

3.2.2.1 Air supply system

the system which performs filtration, humidification and pressure adjustment to air in fuel cell

3.3 Vehicle hydrogen supply system

3.3.1 High pressure hydrogen storage cylinder

the device to store high pressure hydrogen

3.3.2 Hydrogen fueling receptacle

connection device of hydrogen fuel filling at vehicle side

3.3.3 Rated refueling pressure

normal working pressure under designed refueling and standard conditions

3.3.4 Max. refueling pressure

the maximum refueling pressure within a safe operating range (usually 1.25 times rated refueling pressure)

3.4 Fuel cell electric vehicle system

3.4.1 Complete fuel cell vehicle diagram

the diagram which indicates each component of fuel vehicle, as shown in Figure A. External fuel supply B. On-board fuel storage C. Fuel treatment system (indirect hydrogen fuel cell)

D. Fuel cell stack E. Controller and motor F. Transmission system G. Vehicle H. On-board fuel supply I. Fuel cell system J. Fuel cell dynamic system K. On-board energy storage device (internal) L. Fuel cell electric vehicle

3.4.2 Fuel cell power system

the system including fuel cell system, DC/DC converter, driving motor as well as its control system and on-board energy storage

3.4.3 Fuel cell system

including fuel cell stack and fuel cell auxiliary system; it can work as normal under external hydrogen source

3.4.4 Fuel cell auxiliary system

including. air supply system, fuel supply system (or hydrogen supply system), water / thermal management system, control system, security system, etc.

3.5.1.3 Maximum allowable working pressure, MAWP

the maximum gage pressure at which system or part certified by relevant regulations or instructions can work

3.5.1.4 Maximum operating pressure

the maximum working pressure of internal fuel and oxidant at which fuel cell specified by manufacture can continuously work safely

3.5.1.5 Allowable differential working pressure

the maximum pressure difference between each fluid specified by manufacturer, of which the fuel cell module can withstand and not damage or permanently lose functions or characteristics

3.5.1.6 Maximum power

the maximum power value which the system or component can output

3.5.1.7 Maximum operating temperature; MOT

the maximum transient or steady-state temperature of which the system or component can perform non-failure work

3.5.2 Test methods for performance of fuel cell system

3.5.2.1 Standby state

the state of which fuel cell system is well prepared for start and can start any time under start order

3.5.2.6 Start response time to rated power

the time required by fuel cell system from standby state to rated power state, including rated power cold start and rated power hot start

3.5.2.7 Start response time to idle state

the time of fuel cell system from standby state to idle state, including idle cold start and idle hot start; it can operate stably after it reaches to idle state [Translator. 3.5.2.8 is not existed in Chinese version]

3.5.2.9 Heat recovery efficiency (of a fuel cell power system)

the ratio between fuel cell system recovery heat and fed fuel heating value (low heat value) of fuel cell system

3.5.2.10 Fuel cell engine net output power

the power left after fuel cell stack output power minus the power consumed by auxiliary system

3.5.2.15 Hydrogen utilization

the ration between theoretical hydrogen consumption and the amount of hydrogen actually into fuel cell system under specified stable operating conditions

3.5.2.16 Fuel consumption rate

the fuel consumption required by fuel cell electric vehicle to operate 100 km under specific operating conditions, in kg/100 km English index […]