GB T 43255-2023 English Foreign Language Version Translated Version Test Method for Low Low Temperature Cold Start Performance of Fuel Cell Electric Vehicles.
GBT 43255-2023 English Foreign Language Translation GB 43255-2023 English Foreign Language Translation
1 Fan Guo. This document describes the cold start and starting performance test methods of fuel cell electric vehicles in low temperature (below 0 C) environments. This document applies to Class M and Class N fuel cell electric vehicles (hereinafter referred to as "Vehicles") using compressed gaseous hydrogen
2. Normative references.
The content of the following documents constitutes an essential provision of this document by means of normative references in the text. Among them, the reference document with the date is noted, and only the version corresponding to that date applies to this document;For undated references, the most recent version of the document (including all change orders) applies to this document.
gb 18352.6-2016 Emission Limits and Measurement Methods for Light Vehicles (Phase VI in China).
gb/t 18386.1-2021 Test methods for energy consumption and driving range of electric vehicles Part 1: Light vehicles.
GB T 24548 Fuel Cell Electric Vehicles Terminology.
GB T27840-2021 Fuel Consumption Measurement Method for Heavy Commercial Vehicles.
GB T 37154-2018 Fuel cell electric vehicles -- Test method for hydrogen emissions of the whole vehicle.
GB T 37244 Proton Exchange Membrane Fuel Cell Fuel Cell Vehicle Fuel Hydrogen.
gb/t 38146.1-2019 China Automobile Driving Conditions Part 1: Light Vehicles.
gb/t 38146.2-2019 China Automobile Driving Conditions Part 2: Heavy Commercial Vehicles.
3Terms and Definitions.
The terms and definitions defined in GB T 24548 and below apply to this document.
sub-zero cold start duration
The time between the start of the vehicle and the time when the vehicle's drive system is ready (i.e., when the vehicle's gauges show "ready" or "OK") to when the fuel cell stack first reaches 1kW of output.
4Measurement parameters, units, accuracy and resolution.
Table 1 specifies the parameters, units, accuracy and resolution requirements for the test measurements.
5. Test vehicle requirements.
The test vehicle should meet the following requirements:
Maintain the external structure and technical parameters of the vehicle when it leaves the factory;
The viscosity of lubricants for mechanical moving parts is in accordance with the manufacturer's specifications;
Select the appropriate coolant and glass washer fluid at different ambient temperatures, according to the manufacturer's specifications: the fuel used in the vehicle complies with GB T 37244.
6. Test conditions.
6.1. Low temperature environment.
The low temperature environmental conditions should meet the following requirements:
The low ambient temperature is selected from one 10C, 20C, 30C or one 40C;--From the beginning of the immersion to the end of the test, the temperature of the environmental chamber is controlled within the set temperature of the taxi 2C.
6.2 environmental cabins.
The test environment chamber should be equipped with hydrogen volume concentration monitoring and alarm devices and ventilation devices.
Test Method. 7.1. Cryogenic immersion car.
The test vehicle should be immersed in the following steps:
Before the immersion begins, it is allowed to adjust the state of charge (SOC) of the rechargeable energy storage system (REESS) according to the manufacturer's regulations, and record a) the SOC before and after the adjustment, and the state of the fuel cell engine during the adjustment processSet up the environmental chamber to bring the ambient temperature down to the set temperature (from 61. The ambient temperature can also be set in accordance with the manufacturer's B regulations
7.3. Low temperature starting performance test.
7.3.1. Setting of vehicle road load.
7.3.1.1 M class N vehicles and M class vehicles with a total mass of not more than 3 500 kg The chassis dynamometer is set in accordance with GB 183526-2016 in Annex CC. The chassis dynamometer setting for other types of vehicles is carried out in accordance with the provisions of Appendix C in GB T 27840-2021, where the additional mass of the city bus is 65% of the maximum design loading mass. When carrying out the coasting test of the road and chassis dynamometer, the function of the braking energy** system should be turned off. If the driving resistance curve is provided by the automobile manufacturer, the test report, calculation report or other relevant information needs to be provided and inspected by the test institute.
7.3.1.2 The resistance setting of the chassis dynamometer should be adjusted to simulate the vehicle's operation on the road in a low temperature environment. This adjustment can be based on changes in road driving resistance determined at low temperatures;It can also be used in accordance with 7,31.1. The resistance obtained by reducing the coasting time by 10% of the determined driving resistance as an alternative road driving resistance.
7.3.2. Selection of driving mode.
The driving mode should be in accordance with GB T 183861-2021 C2 in the selection of driving mode to set 73.3 Test Methods.
7.3.5. Conditions for trial termination.
The test should be stopped when:
On-board instrument shows stop indication;81
On-board instrument display alarm or fault signal:
During the trial. The vehicle appears 734 There are more than 10 times of the specified speed deviation;c
d. The maximum speed declared by the vehicle is less than the maximum speed under working conditions, and the vehicle cannot reach the declared maximum speed.
7.4. Data collection requirements.
The test data collection should meet the following requirements;
Data in the test should be sampled at a frequency of at least 5 Hz8
If the voltage and current of the fuel cell stack cannot be directly collected due to the structure of the vehicle, the output voltage and output current of the DC DC converter can be collected as an alternative, and the power of the fuel cell stack can be converted according to the DC DC converter efficiency of 97%.
8. Energy consumption data processing.
The energy consumption data processing shall meet the following requirements:
Calculated as per Appendix A 72. The total output energy of the fuel cell stack and REESS in the low-temperature cold start performance test of the vehicle is the energy consumption of the vehicle a) low-temperature cold start
b) Calculation in accordance with Appendix A 73 The total output energy of the battery stack and REESS in the vehicle low-temperature starting performance test is the energy consumption of the vehicle at low temperature.
9. Test data recording.
Refer to Appendix B for the test results of the low-temperature cold start performance test results of fuel cell electric vehicles, and fill in the basic test information table and test record form.