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This document is developed in accordance with the rules given in GB/T 1.1-2020 Directives for standardization—Part 1: Rules for the structure and drafting of standardizing documents.
This document replaces GB/T 26779-2011 Hydrogen fuel cell electric vehicle refueling receptacle. In addition to structural adjustment and editorial changes, the following main technical changes have been made compared with GB/T 26779-2011:
——The ozone aging resistance test is added (see 5.2.6);
——The salt spray corrosion resistance test is added (see 5.2.9);
——The temperature cycling resistance test is added (see 5.2.10);
——The compatibility test is added (see 5.2.11);
——The dimension of 70MPa receptacle is added (see Figure A.3);
——The informative for antifreeze design of receptacle is added (see Annex B);
——The processing requirements for 35MPa receptacle are modified (see Figure A.1, Figure A.2, Figure A.1 of Edition 2011 and Figure A.3 of Amendment No.1);
——The static electricity elimination design is deleted (see 5.1.4 of Edition 2011);
——The requirements for hydrogen embrittlement of material are deleted (see 5.1.6 of Edition 2011);
——The clause “Inspection rules” is deleted (see Clause 7 of Edition 2011);
——The dimension design of 25MPa receptacle is deleted (see Figure A.1 of Edition 2011).
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.
This document was proposed by the Ministry of Industry and Information Technology of the People's Republic of China.
This document is under the jurisdiction of the National Technical Committee of Auto Standardization (SAC/TC 114).
This document was firstly issued in 2011, and this edition is the first revision.
Hydrogen fuel cell electric vehicle refueling receptacle
1 Scope
This document specifies the types, marks, requirements and test methods of hydrogen fuel cell electric vehicle refueling receptacle.
This document is applicable to the hydrogen fuel cell electric vehicle refueling receptacle using compressed hydrogen as working medium, with rated filling pressure not exceeding 70MPa and working temperature ranging from -40°C to 85°C.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions 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 1690-2010 Rubber, vulcanized or thermoplastic—Determination of the effect of liquids
GB/T 10125 Corrosion tests in artificial atmospheres—Salt spray tests
GB/T 24548 Fuel cell electric vehicles—Terminology
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 24548 and the following apply.
3.1
receptacle
component assembly connected with the hydrogen refueling nozzle on the vehicle
3.2
nominal working pressure
rated refueling pressure which is designed under standard state
4 Model
The model of receptacle consists of the following four parts:
5 Requirements
5.1 General requirements
5.1.1 The type and dimension of the interface shall meet the requirements in Annex A. Chamfering, protective cover fixing groove, hexagonal shape and other designs for easy installation are allowed, and such designs shall not affect the normal joint of the hydrogen refueling nozzle.
5.1.2 In order to solve the freezing problem of hydrogen refueling nozzle caused by hydrogen precooling surface, the design of receptacle may refer to Annex B.
5.1.3 Check valves shall be included in the design of receptacle.
5.2 Performance requirements
5.2.1 Air tightness
The air tightness test shall be conducted in accordance with the method specified in 6.3. First, it shall be checked with liquid leak detector. If no air bubbles are generated within 1min, it shall be qualified. If bubbles are generated, continue to use leak detector or other methods for measurement, and the equivalent hydrogen leakage rate shall not exceed 0.02L/h (under standard state).
5.2.2 Vibration resistance
After the vibration resistance test is conducted in accordance with the method specified in 6.4, all connectors shall be free from looseness, and its air tightness shall meet those specified in 5.2.1.
