Test methods for durability of fuel cell engine and its key components
1 Scope
This document describes the test methods for durability of fuel cell engine, fuel cell stack, membrane electrode, air compressor and hydrogen recirculation pump.
This document is applicable to a proton exchange membrane fuel cell engine for vehicle and its key components.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting values
GB/T 20042.2-2023 Proton exchange membrane fuel cell - Part 2: General technical specification of fuel cell stacks
GB/T 24548 Fuel cell electric vehicles - Terminology
GB/T 24554-2022 Performance test methods for fuel cell system
GB/T 36288-2018 Fuel cell electric vehicles - Safety requirement of fuel cell stack
GB/T 37244 Fuel specification for proton exchange membrane fuel cell vehicles - Hydrogen
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 24548 and the following apply.
3.1
average cell voltage
ratio of the voltage of a fuel cell stack to the number of cells in the fuel cell stack
Note: Cells in the fuel cell stack that do not output electric energy, if any, are not included in the above-mentioned number of cells.
3.2
reference current of fuel cell engine
current of fuel cell stack corresponding to the selected power point when a fuel cell engine is subjected to a steady-state characteristic test before the durability test
Note: PE is the rated power of the fuel cell engine (initial value), and the currents of fuel cell stack, I100, I50 and I10, corresponding to 100%PE, 50%PE and 10%PE of the fuel cell engine, are selected as the reference currents in this document.
3.3
reference current of fuel cell stack
current of fuel cell stack corresponding to the average cell voltage of 0.700V±0.005V in the initial polarization curve test in the durability test
3.4
hydrogen recirculation system
apparatus for circulating the fluid medium from the anode outlet to the anode inlet of a fuel cell stack
Note: It is generally formed by a single or multiple combinations of hydrogen circulation pumps and ejectors.
4 Measurement parameters, units and accuracy
Table 1 specifies the measurement parameters, units and accuracy in the test.
Table 1 Requirements for measurement parameters, units and accuracy
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Measurement parameters, units and accuracy
5 Test methods for durability of fuel cell engine
5.1 Test requirements
5.2 Test method
5.3 Data processing
6 Test methods for durability of fuel cell stack for vehicle
6.1 Test requirements
6.2 Test method
6.3 Data processing
7 Test methods for durability of fuel cell membrane electrode for vehicle
7.1 Test requirements
7.2 Test method
7.3 Data processing
8 Test methods for durability of air compressor for fuel cell engine
8.1 Test requirements
8.2 Test method
8.3 Data processing
9 Test methods for durability of hydrogen recirculation pump for fuel cell engine
9.1 Test requirements
9.2 Test methods
9.3 Data processing
Annex A (Normative) Durability test process of fuel cell engine
Annex B (Normative) Cycling conditions for durability of fuel cell engine
Annex C (Normative) Cycling conditions for durability of fuel cell stack
Annex D (Informative) Test fixture and assembly requirements for membrane electrode
Annex E (Normative) Cycling conditions for durability of fuel cell membrane electrode
Annex F (Informative) Operating conditions for activation of fuel cell membrane electrode and recovery procedures for reversible losses in membrane electrode
Annex G (Informative) Record forms for maintenance, failure and force majeure in test of fuel cell engine
Annex H (Informative) Data record forms for durability test of fuel cell engine
Annex I (Informative) Data record form for durability test of fuel cell stack
