GB/Z 44116-2024Test methods for durability of fuel cell engine and its key components (English PDF)

1 Scope

This document describes the durability test methods for fuel cell engines, fuel cell stacks, membrane electrode, air compressors, and hydrogen circulation pumps:

This document applies to automotive proton exchange membrane fuel cell engines and key components:

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document:

For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to

This document:

GB/T 8170 Rules for rounding off values and expression and determination of limit values

GB/T 20042:2-2023 Proton exchange membrane fuel cells Part 2: General technical requirements for cell stacks

GB/T 24548 Terminology for Fuel Cell Electric Vehicles

GB/T 24554-2022 Fuel cell engine performance test method

GB/T 36288-2018 Safety requirements for fuel cell stacks of fuel cell electric vehicles

GB/T 37244 Hydrogen fuel for proton exchange membrane fuel cell vehicles

3 Terms and definitions

The terms and definitions defined in GB/T 24548 and the following apply to this document:

3:1

Average cell voltage averagecelvoltage

The ratio of the voltage of a fuel cell stack to the number of cells in the fuel cell stack:

Note: If there are single cells in the fuel cell stack that do not output electrical energy, they are not included in the number of single cells:

3:3

The fuel cell stack current corresponding to the selected power point when the fuel cell engine is subjected to a steady-state characteristic test before the durability test:

Note: PE is the rated power (initial value) of the fuel cell engine: This document selects the fuel cell engine at 100% PE, 50% PE and 10% PE corresponding to the rated power (initial value):

The fuel cell stack currents I100, I50, and I10 are used as reference currents:

3:3

In the durability test, the initial polarization curve test of the fuel cell stack corresponds to an average single cell voltage of 0:700V±0:005V:

Electric current:

3:4

A device for circulating the fluid medium at the anode outlet of the fuel cell stack to the anode inlet of the fuel cell stack:

Note: It is generally composed of a single or multiple combination of hydrogen circulation pumps and ejectors: