GB/T 18386.1-2021 English PDF (GBT18386.1-2021)

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GB/T 18386.1-2021: Test methods for energy consumption and range of electric vehicles -- Part 1: Light-duty vehicles
GB/T 18386.1-2021
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.020
CCS T 47
Partially replacing GB/T 18386-2017
Test methods for energy consumption and range of
electric vehicles - Part 1: Light-duty vehicles
ISSUED ON: MARCH 09, 2021
IMPLEMENTED ON: OCTOBER 01, 2021
Issued by: State Administration for Market Regulation;
Standardization Administration of the PRC.
Table of Contents
Foreword ... 4 
Introduction ... 6 
1 Scope ... 8 
2 Normative references ... 8 
3 Terms and definitions ... 8 
4 Test conditions ... 9 
4.1 Environmental requirements ... 9 
4.2 Test equipment ... 9 
4.3 Test vehicles ... 9 
4.4 Test cycle ... 10 
5 Test-related parameters and accuracy ... 10 
6 Test procedure ... 11 
6.1 General requirements ... 11 
6.2 Conditions for termination of tests ... 12 
6.3 Test code ... 12 
7 Calculation of energy consumption and range ... 19 
7.1 General ... 19 
7.2 Energy consumption ... 20 
7.3 Range ... 20 
7.4 Determination of type certification value ... 23 
8 Interpolation method for a certain vehicle ... 25 
8.1 Interpolation family ... 25 
8.2 Cycle energy demand of vehicles ... 26 
8.3 Interpolation coefficient ... 26 
8.4 Energy consumption of a certain vehicle ... 27 
8.5 Range of a certain vehicle ... 27 
8.6 Road load family and road load matrix family ... 27 
9 Production conformity ... 28 
9.1 General ... 28 
9.2 Production conformity assurance plan ... 28 
9.3 Production conformity requirements ... 29 
Appendix A (Informative) Test method for energy consumption and range when
heater is turned on in a low-temperature environment ... 31 
Appendix B (Informative) Test method for energy consumption and range when
air-conditioning refrigeration is turned on in a high-temperature environment 35 
Appendix C (Normative) Selection of driving mode ... 39 
Appendix D (Informative) REESS state-of-charge curve ... 42 
Appendix E (Normative) Determination of REESS current and voltage ... 44 
Appendix F (Informative) Location of temperature measuring point ... 46 
Test methods for energy consumption and range of
electric vehicles - Part 1: Light-duty vehicles
1 Scope
This document specifies the test methods for energy consumption and range of
pure electric vehicles.
This document is applicable to category N1 vehicles; categories M1 and M2
vehicles with the maximum design total mass not exceeding 3500 kg.
Categories M1 and L5 vehicles with a maximum design total mass of more than
3500 kg may refer to it for implementation.
2 Normative references
The contents of the following documents, through normative references in this
text, constitute indispensable provisions of this document. Among them, for
dated references, only the edition corresponding to that date applies to this
document. For undated references, the latest edition (including all amendments)
applies to this document.
GB/T 15089 Classification of power-driven vehicles and trailers
GB 18352.6-2016 Limits and measurement methods for emissions from
light-duty vehicles (CHINA 6)
GB/T 19233-2020 Measurement methods of fuel consumption for light-duty
vehicles
GB/T 19596 Terminology of electric vehicles
GB/T 38146.1-2019 China automotive test cycle - Part 1: Light-duty vehicles
3 Terms and definitions
The terms and definitions defined in GB/T 15089, GB/T 19596, GB 18352.6-
2016 and GB/T 38146.1-2019 apply to this document.
the interpolation family, it shall choose a representative vehicle in the
interpolation family. The same test vehicle should be used to represent vehicle
H and vehicle L through different road load settings.
4.3.3 The test vehicle can be run-in according to the needs of the vehicle
manufacturer or its authorized agent. And ensure that the machinery is in good
condition. At the same time, under the condition of installing REESS, a certain
range shall be run-in. The range must be greater than 300 km. At the same time,
REESS shall experience at least one process from full charge to the lowest
value of the state of charge (SOC).
4.3.4 The lubricant, specified by the vehicle manufacturer, shall be used and
indicated in the test result report.
4.3.5 Except for drive purposes, all energy storage systems shall be charged to
the maximum values (electric energy, hydraulic pressure, air pressure, etc.),
specified by the vehicle manufacturer.
4.3.6 Other test vehicle settings shall be carried out in accordance with the
requirements of C.1.2.4.2, C.1.2.4.4 and C.1.2.4.5 in GB 18352.6-2016.
4.4 Test cycle
4.4.1 The test cycle is in accordance with China light-duty vehicle test cycle
described in Appendix A of GB/T 38146.1-2019 (CLTC, including CLTC-P and
CLTC-C; where CLTC-P is suitable for category M1 vehicles; CLTC-C is suitable
for category N1 vehicles; and category M2 vehicles with a maximum design total
mass not exceeding 3500 kg). It includes 3 speed ranges: low speed (part 1),
medium speed (part 2), and high speed (part 3).
4.4.2 If the maximum vehicle speed declared for the vehicle is less than the
maximum speed of the CLTC, when the target vehicle speed is greater than the
maximum vehicle speed declared, the test cycle shall be amended in
accordance with the provisions of CA.5 in GB 18352.6-2016.
5 Test-related parameters and accuracy
The related parameters and accuracy of the test results shall meet the
requirements of Table 2. When calculating in accordance with the provisions of
Clause 7, unless otherwise specified, the process data shall not be rounded.
6.2 Conditions for termination of tests
6.2.1 When conducting the test specified in 6.3.3, when the following conditions
occur, the test shall be stopped.
a) When testing in accordance with the conventional working condition
method specified in 6.3.3.3; if the maximum vehicle speed declared for
the vehicle is not less than the maximum vehicle speed of the CLTC and
cannot meet the tolerance requirements specified in 6.1.4; the test shall
be stopped.
b) When testing in accordance with the conventional working condition
method specified in 6.3.3.3; if the maximum speed declared for the vehicle
is less than the maximum speed of CLTC; for the part exceeding the
maximum speed declared for the vehicle, the test cycle shall be amended
in accordance with the provisions of CA.5 in GB 18352.6-2016. At this time,
the driver is required to depress the accelerator pedal to the end. The
actual vehicle speed is allowed to exceed the upper tolerance limit
specified in 6.1.4. However, when the lower tolerance limit requirements
specified in 6.1.4 cannot be met, the test shall be stopped. When the
target vehicle speed does not exceed the maximum speed declared for
the vehicle, and the tolerance requirements specified in 6.1.4 cannot be
met, the test shall be stopped.
c) When testing in accordance with the shortening method specified in
6.3.3.4; in the constant-speed segment CSSE, if the vehicle fails to meet
the lower tolerance limit requirements specified in 6.1.4 for 4 consecutive
seconds; the test shall be stopped.
6.2.2 When the conditions for the end of the test are reached, the gear remains
unchanged. The vehicle is allowed to coast to the lowest stable speed or 5 km/h.
Then the brake pedal is depressed to stop.
6.3 Test code
6.3.1 Test steps
The same test procedure shall be used to determine energy consumption and
range. The test proced...