GB/T 26991-2023 English PDF (GBT26991-2023)

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GB/T 26991-2023: Test methods for power performance of fuel cell electric vehicles
GB/T 26991-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.080.01
CCS T 47
Replacing GB/T 26991-2011
Test methods for power performance of fuel cell electric
vehicles
ISSUED ON: DECEMBER 28, 2023
IMPLEMENTED ON: JULY 01, 2024
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 6
4 Test conditions ... 6
4.1 Environmental requirements ... 6
4.2 Test equipment ... 7
4.3 Test mass and load distribution ... 7
4.4 Vehicle conditions ... 8
4.5 Road conditions ... 9
5 Test vehicle preparation ... 11
5.1 Hydrogenation ... 11
5.2 Power regulation of conventional REESS ... 11
5.3 Warm-up ... 11
6 Test items ... 11
6.1 Arrangement of test items ... 11
6.2 Driving mode setting ... 12
7 Test method ... 13
7.1 Maximum speed test ... 13
7.2 Maximum thirty-minutes speed test ... 16
7.3 Acceleration capacity test ... 16
7.4 Speed uphill test (unnecessary for the fuel cell electric vehicles other than M1, M2 and
N1 vehicles) ... 18
7.5 Maximum gradient test ... 19
7.6 Hill starting ability test ... 21
Appendix A (Normative) Determination method of correction factor on circular road
... 22
Test methods for power performance of fuel cell electric
vehicles
1 Scope
This document describes the test methods for power performance – such as acceleration
performance, maximum speed and gradeability – of fuel cell electric vehicles.
This document applies to the power performance tests of M and N fuel cell electric
vehicles using compressed hydrogen (hereinafter referred to as “vehicles”).
2 Normative references
The following documents are referred to in the text in such a way that some or all of
their content constitutes requirements 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 3730.2, Road vehicle - Masses - Vocabulary and codes
GB/T 12428, Laden mass calculating method for bus
GB/T 12534, Motor vehicles - General rules of road test method
GB/T 12539, Motor vehicles steep hill climbing test method
GB/T 12545.1-2008, Measurement methods of fuel consumption for automobiles
- Part 1: Measurement methods of fuel consumption for passenger cars
GB/T 15089, Classification of power-driven vehicles and trailers
GB 18384, Electric vehicles safety requirements
GB/T 18385, Electric vehicles - Power performance - Test method
GB/T 19596, Terminology of electric vehicles
GB/T 19752, Hybrid electric vehicle - Power performance - Test method
GB/T 24548, Fuel cell electric vehicles - Terminology
GB/T 37244, Fuel specification for proton exchange membrane fuel cell vehicles -
Hydrogen
in 4.3.2 and 4.3.3; when conducting the 4% and 12% speed uphill test, maximum
gradient and hill starting ability test, the vehicle shall be loaded according to the
maximum authorized pay mass (including the mass of the tester and instrument), and
the load shall be uniformly distributed and firmly fixed.
4.3.2 M1 vehicles AND N1 vehicles of maximum design total mass less than 2 t
The M1 vehicles AND N1 vehicles of maximum design total mass less than 2 t are
classified as follows according to the maximum authorized pay mass:
— If the maximum authorized pay mass is less than or equal to 180 kg, the mass shall
be the maximum authorized pay mass;
— If the maximum authorized pay mass is more than 180 kg and less than or equal to
360 kg, the mass shall be 180 kg;
— If the maximum authorized pay mass is more than 360 kg, the mass shall be 50% of
the maximum authorized pay mass (including the mass of the driver and necessary
test equipment).
The load distribution shall be in accordance with the requirements of 6.1.2 in GB/T
12545.1-2008.
4.3.3 M2, M3 vehicles AND N vehicles of maximum design total mass not less than
2 t
Unless otherwise specified, the load applicable to the M2 and M3 city-bus shall be 65%
of the maximum authorized pay mass; the load for other vehicles shall be the maximum
authorized pay mass (including the mass of the tester and instrument). The load
distribution of M2 and M3 vehicles shall be according to the regulations in GB/T 12428,
while the load distribution of N vehicles shall be according to the regulation in GB/T
12534.
4.4 Vehicle conditions
4.4.1 The shape structure and technical parameters of the vehicle must be maintained
as that when it leaves the factory.
4.4.2 The vehicle under test shall be loaded according to the technical requirements in
4.3.
4.4.3 In the ambient temperature, except for the maximum gradient test, the tire pressure
of vehicle shall meet the requirements of the manufacturer. During the maximum
gradient test, the tire pressure shall be 20 kPa above the factory-set tire charging
pressure under the cold state; the tread pattern depth shall be at least 75% above the
original pattern depth, and the tread shall be in good condition.
4.4.4 The viscosity of lubricating oil for mechanical parts shall meet the manufacturer’s
requirements.
4.4.5 The lighting, signal device and auxiliary equipment on the vehicle shall be
powered off, unless required by the test and daytime operation.
4.4.6 The vehicle shall be clean; the windows and vents not affecting the normal
operation of vehicle and driving system shall be closed through normal operation.
4.4.7 The drive system and tires shall be running-in according to the requirements of
the manufacturer’s manual.
4.4.8 Before test, the vehicle under test shall at least run for 300 km under the support
of fuel cell system on the vehicle.
4.4.9 The hydrogen fuel of vehicle shall meet the regulations of GB/T 37244.
4.5 Road conditions
4.5.1 General conditions
The test shall be conducted on a dry straight or circular track. The pavement shall be
hard, flat, clean and good in adhesion coefficient.
4.5.2 Straight conditions
The length of measurement area shall be at least 1 000 m.
The acceleration area shall be long enough so that the vehicle can achieve the maximum
speed within 200 m before entering the measurement area. The longitudinal gradient of
both the measurement area and the area 200 m after the acceleration area shall not
exceed 0.5%. The longitudinal gradient of the acceleration area shall not exceed 4%.
The lateral gradient of the measurement area shall not exceed 3%.
To reduce the test errors, the test shall be conducted in two directions of the test track
and in the same path as far as possible. If the test cannot be conducted in two directions
due to limited conditions, the vehicle can be tested in one direction according to 4.5.4.
When testing in one direction, the longitudinal gradient of the straight track shall not
exceed 0.1%.
4.5.3 Circular track
The length of the circular track shall be at least 1 000 m. The circular track is not a
complete circle, but being connected by a linear part and a part approximate to a ring.
The curvature radius of the curve shall be no less than 200 m.
5 Test vehicle preparation
5.1 Hydrogenation
Hydrogen shall be added according to the manufacturer’s hydrogenation procedures.
5.2 Power regulation of conventional REESS
To ensure the normal operation of fuel cell system in the vehicle and avoid the single
o...