1 Scope
This standard specifies test methods of onboard hydrogen system of fuel cell electric vehicles.
This standard is applicable to fuel cell electric vehicles with compressed hydrogen as fuel, nominal working pressure of onboard hydrogen system not exceeding 70 MPa at 15℃ of environment temperature.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the dated versions apply to this standard. For undated references, the latest editions of the normative documents (include all the amendments) are applicable to this standard.
GB/T 24548 Fuel Cell Electric Vehicles - Terminology
GB/T 24549 Fuel Cell Electric Vehicles - Safety Requirements
GB/T 26779-2011 Fuel Cell Electric Vehicles - Refuelling Receptacle
GB/T 26990-2011 Fuel Cell Electric Vehicles-Onboard Hydrogen System-Specifications
3 Terms and Definitions
For the purposes of this standard, the terms and definitions given in GB/T 24548 apply.
4 Test Conditions
4.1 Vehicle conditions
4.1.1 Onboard hydrogen system shall be manufactured according to product drawing and other technical documents approved by specified procedures, and shall be provided with certificate.
4.1.2 Onboard hydrogen system shall meet the requirements of GB/T 24549, installation of hydrogen system and its device shall be able to operate safely and reliably under normal application condition.
4.2 Environmental conditions
4.2.1 In the test process, atmospheric pressure shall not be less than 91 kPa, temperature shall be 5℃~35℃, relative humidity shall be less than 95%, and the proving ground shall be kept dry.
4.2.2 Measure wind speed 1.2m above the ground in the proving ground, the average wind speed shall be less than 3 m/s, and the gust speed shall be less than 5 m/s.
5 Test Equipment and Instrument
Test equipment and instrument shall be tested, maintained and calibrated according to the requirements of manufacturer. Accuracy for measurement of hydrogen leakage shall meet the requirements of Table 1.
Table 1 Requirements for Test Instrument
No. Parameters Requirements
1 Time Instrument precision is not less than 60 s
2 Distance Instrument precision is 1%
3 Pressure Accuracy is not inferior to Grade 1.5, measuring range is 1.5 ~ 3 times of the measured value.
4 Flow Accuracy is not inferior to Grade 1.5, measuring range is 1.5 ~ 3 times of the measured value.
6 Test Methods
6.1 General
6.1.1 Hydrogen storage vessel and pipeline
6.1.1.1 Inspect whether the installation position and direction of pipelines in the hydrogen system are kept away from heat source and places where it's possible for electrical appliances and storage battery to generate arc, inspect whether high pressure pipelines and components are grounded reliably.
6.1.1.2 Inspect whether hydrogen storage vessel and pipeline are installed in passenger compartment, luggage compartment or other places with poor ventilation; but if it's unavoidable, inspect whether isolation measures in the passenger compartment and luggage compartment have been taken.
