GB/T 26990-2023 Fuel cell electric vehicles — Onboard hydrogen system technical specifications
1 Scope
This document specifies the technical requirements and test methods of onboard hydrogen system for fuel cell electric vehicles.
This document is applicable to fuel cell electric vehicles that use compressed gaseous hydrogen as fuel at an ambient temperature of 15°C and with operating pressure not exceeding 70MPa.
2 Normative references
The following referenced documents are indispensable for the application 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 2423.4 Environmental testing for electric and electronic products - Part 2: Test method - Test Db: Damp heat, cyclic (12h+12h cycle)
GB/T 2423.17 Environmental testing for electric and electronic products - Part 2: Test methods - Test Ka: Salt mist
GB/T 2423.43 Environmental testing for electric and electronic products - Part 2: Test methods - Mounting of specimens for vibration impact and similar dynamic tests
GB/T 2423.56 Environmental testing - Part 2: Test methods - Test Fh: Vibration, broadband random and guidance
GB/T 24548 Fuel cell electric vehicles - Terminology
GB/T 24549 Fuel cell electric vehicles - Safety requirements
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 24548 and GB/T 24549 and the following apply.
3.1
onboard hydrogen system
devices related to the filling, storage, delivery, supply and control of hydrogen, from hydrogen refueling ports to pressure regulator, of fuel cell electric vehicles
Note: See Annex A for the schematic diagram of onboard hydrogen system.
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3.2
hydrogen storage cylinder
devices used to store high-pressure hydrogen in fuel cell electric vehicles
3.3
check valve
a valve used to prevent the backflow of gas medium
3.4
pressure regulator
a valve used to reduce the pressure to the operating pressure required
4 Measurement parameter, unit, accuracy and resolution
Table 1 specifies the measurement parameter, unit, accuracy and resolution for the test.
Table 1 Requirements for measurement parameter, unit, accuracy and resolution
Foreword II
1 Scope
2 Normative references
3 Terms and definitions
4 Measurement parameter, unit, accuracy and resolution
5 Requirements
5.1 General requirements
5.2 Safety protection requirements
5.3 Requirements for installation strength
5.4 Requirements for air tightness
5.5 Requirements for environmental adaptability
6 Test conditions
7 Test methods
7.1 Test method of main shut off valve
7.2 Test method of installation strength
7.3 Test method of air tightness
7.4 Test methods of environmental adaptability
Annex A (Informative) Schematic diagram of onboard hydrogen system
Annex B (Informative) Leakage rate conversion of hydrogen and helium
