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GB/T 26990-2023 PDF English

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GB/T 26990-2023: Fuel cell electric vehicles - Onboard hydrogen system technical specifications
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GB/T 26990: Evolution and historical versions

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GB/T 26990-2023English305 Add to Cart 0-9 seconds. Auto-delivery Fuel cell electric vehicles - Onboard hydrogen system technical specifications Valid
GB/T 26990-2011English70 Add to Cart 0-9 seconds. Auto-delivery [Including 2020XG1] Fuel cell electric vehicles -- Onboard hydrogen system -- Specifications Obsolete

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GB/T 26990-2023: Fuel cell electric vehicles - Onboard hydrogen system technical specifications

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GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 43.080.01 CCS T 47 Replacing GB/T 26990-2011, GB/T 29126-2012 Fuel cell electric vehicles - Onboard hydrogen system technical specifications Issued on. NOVEMBER 27, 2023 Implemented on. NOVEMBER 27, 2023 Issued by. State Administration for Market Regulation; Standardization Administration of PRC.

Table of Contents

Foreword... 3 1 Scope... 5 2 Normative references... 5 3 Terms and definitions... 5 4 Measurement parameters, units, accuracy, resolution... 6 5 Requirements... 6 5.1 General requirements... 6 5.2 Safety protection requirements... 7 5.3 Installation strength requirements... 7 5.4 Air tightness requirements... 8 5.5 Environmental adaptability requirements... 8 6 Test conditions... 9 7 Test methods... 9 7.1 Test method of main shut-off valve... 9 7.2 Test method of installation strength... 10 7.3 Test method of air tightness... 11 7.4 Test method of environmental adaptability... 13 Appendix A (Informative) Schematic diagram of onboard hydrogen system... 19 Appendix B (Informative) Conversion of hydrogen and helium leak rate... 20

Foreword

This document was drafted in accordance with the provisions of GB/T 1.1-2020 "Directives for standardization - Part 1.Rules for the structure and drafting of standardizing documents". This document replaces GB/T 26990-2011 "Fuel cell electric vehicles - Onboard hydrogen system - Specifications" and GB/T 29126-2012 "Fuel cell electric vehicles - - Onboard hydrogen system - Test methods". This document is based on GB/T 26990- 2011 and integrates the contents of GB/T 29126-2012.Compared with GB/T 26990- 2011, in addition to structural adjustments and editorial changes, the main technical changes are as follows. a) CHANGE the working pressure of the on-board hydrogen system in the Scope to not exceed 70 MPa (see Chapter 1; Chapter 1 of GB/T 26990-2011); b) CHANGE the definition of on-board hydrogen system (see 3.1; 3.1 of GB/T 26990-2011); c) CHANGE the pressure regulator into a pressure regulator (see 3.4; 3.4 of GB/T 26990-2011); d) DELETE the term of pressure relief valve (see 3.5 of GB/T 26990-2011); e) ADD the measurement parameters, units, accuracy, resolution requirements (see Chapter 4); f) DELETE part of the requirements (see Chapter 4 of GB/T 26990-2011); g) ADD the test requirements for main shut-off valve (see 5.2.3; 4.1.6 of GB/T 26990-2011); h) CHANGE the installation strength requirements and its test requirements (see 5.3; 4.2.4 of GB/T 26990-2011); i) ADD the air tightness requirements and test requirements (see 5.4); j) ADD the environmental adaptability requirements and test requirements (see 5.5); k) ADD the test conditions (see Chapter 6); l) ADD the test method of main shut-off valve (see 7.1); m) ADD the test method of installation strength (see 7.2); n) ADD the test method of air tightness (see 7.3); o) ADD the test method of environmental adaptability, including high and low temperature test, damp heat test, vibration test, salt spray test (see 7.4). Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents. This document was proposed by the Ministry of Industry and Information Technology of the People's Republic of China. This document shall be under the jurisdiction of the National Automotive Standardization Technical Committee (SAC/TC 114). Drafting organizations of this document. Zhejiang University, China Automotive Technology and Research Center Co., Ltd., China Automotive Research Institute New Energy Vehicle Inspection Center (Tianjin) Co., Ltd., Toyota Motor (China) Investment Co., Ltd., Shanghai Shunhua New Energy Systems Co., Ltd., Dongfeng Motor Group Co., Ltd., Beiqi Foton Motor Co., Ltd., Daimler (China) Commercial Vehicle Investment Co., Ltd., Xiamen King Long United Automotive Industry Co., Ltd., FAW Toyota Motor Co., Ltd. Technology R&D Branch, Shanghai Jenin New Energy Technology Development Co., Ltd., Baowu Clean Energy Co., Ltd. The main drafters of this document. Hua Zhengli, Lan Hao, Zheng Jinyang, Liu Guibin, He Yuntang, Hao Dong, Xu Nuo, Le Yu, Zheng Tianlei, Hao Weijian, Shi Jianpeng, Mao Zhifei, Zhang Yanyi, Liu Yongliang, Zhao Xiaoxiao, Yang Yunpeng, Ding Rui, Song Guangji, Zhang Aoteng, Gao Wei, Fan Yonggang, Xu Yixiang, Ji Haiyan. This standard replaces the standard previously issued as follows. - It was first published in 2011 as GB/T 26990-2011; - This is the first revision, which incorporates the contents of GB/T 29126-2012. Fuel cell electric vehicles - Onboard hydrogen system technical specifications

1 Scope

This document specifies the technical requirements and test methods for on-board hydrogen systems of fuel cell electric vehicles. This document applies to fuel cell electric vehicles, that use compressed gaseous hydrogen as fuel and have an operating pressure not exceeding 70 MPa, at an ambient temperature of 15 °C.

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, for dated reference documents, only the version corresponding to the date applies to this document; for undated reference documents, the latest version (including all amendments) applies to this document. GB/T 2423.4 Environmental testing for electric and electronic products - Part 2.Test method - Test Db. Damp heat, cyclic (12 h + 12 h cycle) GB/T 2423.17 Environmental testing for electric and electronic products - Part 2. Test method - Test Ka. Salt mist GB/T 2423.43 Environmental testing for electric and electronic products - Part 2. Test methods - Mounting of specimens for vibration, impact and similar dynamic tests GB/T 2423.56 Environmental testing - Part 2.Test methods - Test Fh. Vibration, broadband random and guidance GB/T 24548 Fuel cell electric vehicles - Terminology GB/T 24549 Fuel cell electric vehicles - Safety requirements

3 Terms and definitions

The terms and definitions as defined in GB/T 24548 and GB/T 24549, as well as the following terms and definitions, apply to this document. 3.1 Onboard hydrogen system On fuel cell electric vehicles, from the hydrogenation port to the pressure regulator, devices related to hydrogen filling, storage, transportation, supply, control. 3.2 Hydrogen storage cylinder A device used to store high-pressure hydrogen on fuel cell electric vehicles. 3.3 Check valve A valve used to prevent the backflow of gaseous media.

4 Measurement parameters, units, accuracy, resolution

Table 1 specifies the parameters, units, accuracy, resolution of the test measurements.

5 Requirements

5.1 General requirements 5.1.1 All components of the on-board hydrogen system shall be checked and inspected before installation. The specifications and models of each component shall match and be complete. 5.1.2 The on-board hydrogen system shall be manufactured in accordance with the product drawings and other technical documents approved by the prescribed procedures. The hydrogenation port, hydrogen storage cylinder, valves and other components shall comply with relevant standards; a product certificate and batch inspection certificate shall be provided. 5.2 Safety protection requirements 5.2.1 In order to prevent the pressure downstream of the pressure regulator from abnormally increasing, the following two methods can be used. 5.3 Installation strength requirements 5.3.1 After the hydrogen storage cylinder (group) is installed and tightened, conduct a dynamic impact test according to the provisions of 7.2.2.It shall be ensured that the hydrogen storage cylinder (group) is still fixed on the fixed seat; the fastening parts shall not be deformed, broken, loosen, etc. 5.4 Air tightness requirements 5.4.1 The cylinder, valve, pipeline and each connection shall be well sealed. They shall be tested according to the test method in 7.3. 5.4.2 When using a gas detector to test air tightness, the hydrogen leakage rate at each detection point in each stage shall not be greater than 0.167 mL/min or the leakage concentration shall not be greater than 300 mL/m3.See Appendix B for the calculation of leakage rate conversion between different gases. 5.5 Environmental adaptability requirements 5.5.1 The test pressure shall be the nominal working pressure of the on-board hydrogen system. 5.5.2 Environmental adaptability test includes high and low temperature test, damp heat test, vibration test, salt spray test. After each test, the air tightness of the system under the nominal working pressure shall be checked and meet the requirements of 5.4.2.

6 Test conditions

6.1 During the test, the atmospheric pressure shall be no less than 91 kPa; the temperature shall be between 5 °C and 35 °C; 6.2 Measure the wind speed at a height of 1.2 m above the ground at the test site. The average wind speed shall be less than 3 m/s and the gust shall be less than 5 m/s. 6.3 Unless otherwise specified, the test gas shall be clean dry hydrogen, dry helium or a mixture of 10% helium and 90% nitrogen.

7 Test methods

7.1 Test method of main shut-off valve Connect the pipeline downstream of the main shut-off valve to the flow detection device, pressure detection device, stop valve (as shown in Figure 1). For multiple cylinder groups, each main shut-off valve shall be tested one by one. During the test, the non- test main shut-off valve is in a manual cut-off closed state. 7.2 Test method of installation strength 7.2.1 Test preparation According to the product technical documents, fix the sample on the test bench. The fixing method shall not strengthen the fixation of the hydrogen storage cylinder (group). Fill the hydrogen storage cylinder (group) with the test gas to the rated filling mass, OR use a test tooling with the cylinder mass plus the rated filling mass instead. T 7.2.2 Dynamic test Apply an acceleration impact to the test object. Maintain the acceleration value specified below for at least 30 ms. Conduct one test in each specified direction, for a total of 3 times. 7.2.3 Static test The test method of static installation strength is as follows. 7.3 Test method of air tightness 7.3.1 Gas replacement Gas sampling and analysis shall be carried out after replacement. The volume concentration of oxygen shall not exceed 0.5%. 7.3.2 Air tightness test Test as follows. 7.4 Test method of environmental adaptability 7.4.1 High and low temperature test 7.4.1.1 Low temperature test The test steps are as follows. a) Place the system under test in a -40 °C test environment; let it stand for more than 12 hours; b) The test environment temperature rises to 25 °C; the system under test is left standing at this temperature for more than 12 hours; 7.4.1.2 High temperature test The test steps are as follows. a) Place the system under test in a 60 °C test environment; let it stand for more than 12 hours; b) The test environment temperature drops to 25 °C; the system under test is left standing at this temperature for more than 12 hours; 7.4.2 Damp heat test The test is carried out in accordance with GB/T 2423.4.The variables are shown in Figure 5.The maximum temperature is 60 °C ± 3 °C, for a total of 5 cycles. 7.4.3 Vibration test 7.4.3.1 According to the installation position of the test object and the requirements of GB/T 2423.43, install the test object on the vibration bench. Random and fixed- frequency vibration loads are applied in each direction; the loading sequence should be random on the z-axis, fixed-frequency on the z-axis, random on the y-axis, fixed frequency on the y-axis, random on the x-axis, fixed frequency on the x-axis. The test process is in accordance with GB/T 2423.56. 7.4.3.4 During the test, if any abnormalities such as shedding, wear, or deformation occur, the test shall be stopped immediately. 7.4.4 Salt spray test Conduct the test in accordance with the test conditions of GB/T 2423.17.The salt solution is prepared with sodium chloride and distilled or deionized water, which has a concentration of (5 ± 1)% (mass fraction). The pH value measured at 35 °C ± 2 °C is within 6.5 ~ 7.2. ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.


      

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