Post-crash safety requirement for fuel cell electric vehicle
1 Scope
This document specifies the special post-crash safety requirement for fuel cell electric vehicles and describes the corresponding test methods.
This document is applicable to Categories M and N fuel cell electric vehicles that use compressed gaseous hydrogen with the nominal working pressure of the onboard hydrogen system of not exceeding 70 MPa.
2 Normative references
The following documents contain requirements 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 11551 The protection of the occupants in the event of a frontal collision for motor vehicle
GB/T 15089 Classification of power-driven vehicles and trailers
GB 17578 Requirements and test methods of strength for the superstructure of bus
GB/T 18385 Electric vehicles Power performance Test method
GB/T 19596 Terminology of electric vehicles
GB 20071 The protection of the occupants in the event of a lateral collision
GB 20072 The requirements of fuel system safety in the event of rear-end collision for passenger car
GB/T 24548 Fuel cell electric vehicles - Terminology
GB/T 24549-2020 Fuel cell electric vehicles - Safety requirements
GB 26512-2021 The protection of the occupants of the cab of commercial vehicles
GB/T 26990 Fuel cell electric vehicles - Onboard hydrogen system technical specifications
GB/T 31498-2021 Post crash safety requirement for electric vehicle
GB 38032-2020 Electric buses safety requirements
ISO 6487: 2015 Road vehicles - Measurement techniques in impact tests - Instrumentation
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 19596, GB/T 24548, GB/T 24549-2020, GB/T 26990, GB/T 15089, and the following apply.
3.1
main shut-off valve
valve used to shut off the supply of hydrogen gas downstream from a hydrogen storage cylinder
[Source: GB/T 24549-2020, 3.1, modified]
3.2
enclosed or semi-enclosed spaces
space inside the vehicle that may be exposed to the hydrogen storage cylinder and an environmental space or area where hydrogen gas may accumulate
Note: For example, the passenger compartment, luggage compartment, cargo compartment or the space under the front hatch cover are enclosed or semi-enclosed spaces.
[Source: GB/T 24549-2020, 3.4, modified]
3.3
nominal working pressure; NWP
limited charging pressure at which the gas pressure inside the hydrogen storage cylinder reaches a completely stable state at the reference temperature (15°C)
[Source: GB/T 24549-2020, 3.5, modified]
3.4
compressed hydrogen storage system; CHSS
device for storing hydrogen in a fuel cell vehicle consisting of a hydrogen storage cylinder (group), a safety pressure relief device, and a closing device for isolating the stored hydrogen from the rest of the fuel system and its environment
Note: See the thick line part specified in Figure 1.
Contents
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Measurement parameters, units, accuracy, and resolution
5 Safety requirements
6 Test procedures
7 Test methods
Annex A (Informative) Verification of pressure and temperature sensors
Bibliography
