GB/T 44131-2024 English PDF (GBT44131-2024)

Delivery: 3 seconds. Download true-PDF + Invoice.
Get QUOTATION in 1-minute: Click GB/T 44131-2024
Historical versions: GB/T 44131-2024
Preview True-PDF (Reload/Scroll if blank)

GB/T 44131-2024: Post-crash safety requirement for fuel cell electric vehicle
GB/T44131-2024
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.020
CCS T 09
GB/T 44131-2024
Post-crash safety requirement for fuel cell electric vehicle
ISSUED ON. MAY 28, 2024
IMPLEMENTED ON. MAY 28, 2024
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Terms and definitions... 5
4 Measurement parameters, units, accuracy and resolution... 6
5 Safety requirements... 6
6 Test procedures... 9
7 Test methods... 10
Annex A (informative) Verification procedure of pressure and temperature sensors.. 19
Bibliography... 21
Post-crash safety requirement for fuel cell electric vehicle
1 Scope
This document specifies the special post-crash safety requirements for fuel cell electric
vehicles and describes the corresponding test methods.
This document applies to M and N fuel cell electric vehicles that use compressed
gaseous hydrogen and the nominal working pressure of the on-board hydrogen system
does not exceed 70 MPa.
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 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 Battery 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 purpose of this document, the terms and definitions defined in GB/T 19596,
GB/T 24548, GB/T 24549-2020, GB/T 26990, GB/T 15089 and the following apply to
this document.
3.1
main shut-off valve
A valve used to shut off the supply of hydrogen from the hydrogen storage cylinder to
the downstream.
[Source. GB/T 24549-2020, 3.1, modified]
3.2
enclosed or semi-enclosed spaces
Spaces in the vehicle that may be exposed to hydrogen storage cylinders and
environmental spaces and areas where hydrogen may accumulate.
NOTE. The passenger compartment, luggage compartment, cargo compartment, or space under the
front hatch are all enclosed or semi-enclosed spaces.
[Source. GB/T 24549-2020, 3.4, modified]
3.3
nominal working pressure; NWP
At the reference temperature (15 °C), the limit filling pressure when the gas pressure in
the hydrogen storage cylinder reaches full stability.
[Source. GB/T 24549-2020, 3.5, modified]
3.4
compressed hydrogen storage system; CHSS
A device for storing hydrogen in a fuel cell vehicle, consisting of a hydrogen storage
cylinder (set), 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 solid line in Figure 1.
5.1.2.1 The installation requirements for CHSS of M2, M3, N2 and N3 vehicles are as
follows.
a) The main shut-off valve of CHSS is located behind the vertical plane 420 mm
backward from the frontmost end of the vehicle, and the hydrogen storage
cylinder shall not be located at the outermost part of the vehicle.
b) The main shut-off valve of CHSS is located between the vertical planes 200 mm
inward from the outermost end of the vehicle body on both sides, and the
hydrogen storage cylinder shall not be located at the outermost part of the vehicle.
If the position of the CHSS does not meet this requirement, a side impact test
shall be conducted in accordance with 6.2.5, and the vehicle shall meet the
requirements of 5.2.1 and 5.2.3 after the test.
c) The main shut-off valve of CHSS is located in front of the vertical plane 300 mm
forward from the rearmost end of the vehicle, and the hydrogen storage cylinder
shall not be located at the outermost part of the vehicle. If the position of the
CHSS does not meet this requirement, a rear-end collision test shall be conducted
in accordance with 6.2.5, and the vehicle shall meet the requirements of 5.2.1 and
5.2.3 after the test.
NOTE. The frontmost and outermost parts do not contain external vision devices.
5.1.2.2 The CHSS of M2, M3, N2 and N3 vehicles shall meet the requirements of 5.2.3
after completing the sled test in accordance with 6.2.4.
5.1.2.3 M2 and M3 vehicles of which the lowest point of the rechargeable energy storage
system (REESS) is no more than 1 m above the ground when unloaded shall meet the
requirements of 5.3, 5.4.1 and 5.4.2 after the collision test in accordance with 5.5.1 of
GB 38032-2020.
5.1.2.4 M2 and M3 vehicles that meet the scope of GB 17578 shall meet the
requirements of 5.3, 5.4.1 and 5.4.2 after the upper structure strength test in accordance
with 5.5.2 of GB 38032-2020.
5.2 Post-crash safety requirements for CHSS
5.2.1 Fuel leakage limit of CHSS
According to the test method specified in 7.1, within the leakage test time Δt, the sum
of the average hydrogen leakage rates of all hydrogen storage cylinders shall not exceed
118 L/min (standard state).
NOTE. Δt is a calculated value, which is calculated either according to formula (2) or formula (10),
depending on the medium filled in the hydrogen storage cylinder during the test.
5.2.2 Concentration limit in closed or semi-closed spaces
REESS shall meet the requirements of 4.4 of GB/T 31498-2021.
5.4.3 Special safety requirements for hydrogen system
Within the leakage test time, Δt, after the collision, the CHSS and fuel cell engine shall
not catch fire or explode.
6 Test procedures
6.1 Vehicle preparation before test
6.1.1 For externally rechargeable fuel cell electric vehicles, the REESS shall be fully
charged according to the method specified in GB/T 18385 and tested within 24 hours.
6.1.2 For non-externally rechargeable fuel cell electric vehicles, the REESS shall be
prepared for test in normal operating conditions.
6.1.3 The manufacturer shall install pressure and temperature measuring equipment that
meets the requirements of Table 1 on the CHSS and provide a metrological certificate.
Before the test, the testing agency may refer to Annex A for verification and prepare for
the post-crash fuel leakage test in accordance with 7.1.1.
6.1.4 The gas concentration test in closed or semi-closed spaces shall be prepared in
accordance with 7.2.
6.1.5 For frontal collision, lateral collision and rear-end collision tests, preparations
shall be made in accordance with the test ...