Skip to product information
1 of 11

PayPal, credit cards. Download editable-PDF and invoice in 1 second!

GB/T 38954-2020 English PDF (GBT38954-2020)

GB/T 38954-2020 English PDF (GBT38954-2020)

Regular price $245.00 USD
Regular price Sale price $245.00 USD
Sale Sold out
Shipping calculated at checkout.
Quotation: In 1-minute, 24-hr self-service. Click here GB/T 38954-2020 to get it for Purchase Approval, Bank TT...

GB/T 38954-2020: Hydrogen fuel cell power system for unmanned aerial vehicles

This standard specifies the general requirements, technical requirements, test methods, marking, packaging and transportation requirements for hydrogen fuel cell power systems for unmanned aerial vehicles. This standard applies to fuel cell power systems that use compressed hydrogen as fuel to provide power and non-powered electricity for unmanned aerial vehicles which have an unloaded mass not exceeding 116 kg and a maximum take-off mass not exceeding 150 kg.
GB/T 38954-2020
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 27.070
K 82
Hydrogen fuel cell power system for unmanned aerial
vehicles
ISSUED ON: JUNE 02, 2020
IMPLEMENTED ON: DECEMBER 01, 2020
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 4
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 6
4 General requirements ... 8
4.1 General ... 8
4.2 General safety requirements ... 10
4.3 Appearance and structure ... 11
4.4 Other general technical requirements ... 11
5 Technical requirements ... 12
5.1 Start-up time ... 12
5.2 Time to reach rated power ... 12
5.3 Rated output power ... 12
5.4 Power overload rate ... 12
5.5 Output voltage range ... 12
5.6 Power efficiency ... 12
5.7 Startup/shutdown method ... 13
5.8 Shutdown time... 13
5.9 Continuous operation time ... 13
5.10 Noise ... 13
5.11 Vibration resistance ... 13
5.12 Electromagnetic compatibility limits ... 13
5.13 Data transmission... 14
5.14 Hydrogen supply flow ... 14
5.15 Fuel concentration in cabin ... 14
5.16 Limitation of fuel concentration in exhaust gas ... 14
5.17 Degree of protection of cabin ... 14
5.18 Service life ... 14
5.19 Hydrogen leakage rate ... 15
5.20 Alarming function and monitoring function ... 15
6 Test method ... 16
6.1 Test preparation ... 16
6.2 Test of start-up time ... 16
6.3 Test of time to reach rated power ... 17
6.4 Test of rated output power ... 17
6.5 Test of power overload rate ... 17
6.6 Test of output voltage range ... 17
6.7 Electric efficiency test ... 17
6.8 Test of startup/shutdown mode ... 18
6.9 Test of shutdown time ... 18
6.10 Test of continuous operation time ... 18
6.11 Noise test ... 18
6.12 Vibration resistance test ... 19
6.13 Test of electromagnetic compatibility limit ... 19
6.14 Data transmission test ... 20
6.15 Hydrogen flow test... 20
6.16 Test of fuel concentration in cabin ... 20
6.17 Fuel concentration test in exhaust gas ... 21
6.18 Cabin protection level test ... 21
6.19 Service life test ... 21
6.20 Hydrogen leakage rate test ... 21
6.21 Test of alarming and monitoring function ... 23
7 Marking, packaging, transportation ... 23
7.1 Marking ... 23
7.2 Packaging ... 24
7.3 Documentation ... 24
Appendix A (Informative) Hydrogen cylinder requirements ... 25
Appendix B (Informative) Typical life test method ... 26
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed by China Electrical Equipment Industry
Association.
This standard shall be under the jurisdiction of the National Fuel Cell and Flow Battery Standardization Technical Committee (SAC/TC 342).
Drafting organizations of this standard: Xinyan Hydrogen Energy Technology Co., Ltd., Shouhang Guoyi (Wuhan) Technology Co., Ltd., Beijing Institute of Electrical Technology and Economics of Mechanical Industry, Dalian Institute of Chemical Physics of Chinese Academy of Sciences, Xinyuan Power Co., Ltd., Wuhan University of Technology University, Shanghai Shenli Technology Co., Ltd., Aerospace New Long March Electric Vehicle Technology Co., Ltd.,
Shanghai Panye Hydrogen Energy Technology Co., Ltd., China Quality
Certification Center, Wuhan Zhongyu Power System Technology Co., Ltd.,
Dongguan Zhongchuang New Energy Technology Co., Ltd., Beijing Shangdian Technology Co., Ltd., Shanghai Institute of Quality Supervision and Inspection Technology, Wuxi City Product Quality Supervision and Inspection Institute, Guangdong Hezhide Energy Technology Co., Ltd., Beijing Yihuatong
Technology Co., Ltd., Shanghai Hengjin Power Technology Co., Ltd., Shanghai Boxuan Energy Technology Co., Ltd., Zhejiang Gaocheng Green Energy
Technology Co., Ltd.
The main drafters of this standard: Qi Zhigang, Zhang Liang, Pan Mu, Yu Hongmei, Zhou Bin, Xing Danmin, Lu Chenyu, Jin Yinshi, Dong Hui, Wang
Gang, Li Songli, Chen Yao, Huang Ping, Zhao Feng, Chen Wei, Xu Weiqiang, Liu Ran, Hu Lei, Tian Binglun, Hou Xiangli.
Hydrogen fuel cell power system for unmanned aerial
vehicles
1 Scope
This standard specifies the general requirements, technical requirements, test methods, marking, packaging and transportation requirements for hydrogen fuel cell power systems for unmanned aerial vehicles.
This standard applies to fuel cell power systems that use compressed hydrogen as fuel to provide power and non-powered electricity for unmanned aerial vehicles which have an unloaded mass not exceeding 116 kg and a maximum take-off mass not exceeding 150 kg.
2 Normative references
The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this standard.
GB/T 191 Packaging - Pictorial marking for handling of goods
GB/T 2893.2-2008 Graphical symbols - Safety colors and safety signs - Part 2: Design principles for product safety labels
GB/T 4208-2017 Degrees of protection provided by enclosure (IP code)
GB/T 4980-2003 Determination of sound level for noise emitted by
displacement compressors
GB/T 15329-2019 Rubber hoses and hose assemblies - Textile-reinforced
hydraulic types for oil-based or water-based fluids - Specification
GB/T 17626.2-2018 Electromagnetic compatibility - Testing and
measurement techniques - Electrostatic discharge immunity test
GB/T 17626.3-2016 Electromagnetic compatibility - Testing and
measurement techniques - Radiated, radio-frequency, electromagnetic field immunity test
GB/T 20042.1 Proton exchange membrane fuel cell - Part 1: Terminology
GB/T 20438.1 Functional safety of electrical/electronic/programmable
electronic safety-related systems - Part 1: General requirements
GB/T 20972.1 Petroleum and natural gas industries - Material for use in H2S-containing environments in oil and gas production - Part 1: General principles for selection of cracking resistant materials
GB/T 28816 Fuel cell - Terminology
GB/T 36288-2018 Fuel cell electric vehicles - Safety requirement of fuel cell stack
YD/T 122 Nameplates of products for posts and telecommunications
industry
3 Terms and definitions
The terms and definitions as defined in GB/T 20042.1 and GB/T 28816 as well as the following terms and definitions apply to this document.
3.1
Unmanned aerial vehicle
An unmanned aerial vehicle controlled and managed by a remote-control
system (including remote control or autonomous flight).
3.2
Fuel cell power system for unmanned aerial vehicle
A fuel cell power system that provides power and non-power electricity for unmanned aerial vehicles.
Note: In this standard, fuel cell power systems include fuel cell systems (including auxiliary energy storage modules) and fuel storage modules and fuel supply modules (both collectively referred to as fuel systems) that provide hydrogen to it.
3.3
Start-up time
The duration of the fuel cell power system from the moment of power-on (the moment when the manual power-on starts from the starting action) to the moment when there is net electric power output.
3.4
Shut-down time
The length of time from the moment when the fuel cell power system
receives the shutdown instruction (the moment when the manual shutdown
starts from the shutdown action) to the moment when all components stop working.
3.5
Rated output power
The maximum continuous output power of the fuel cell power system under normal operating conditions as specified by the manufacturer.
3.6
Output voltage range
Under the normal operating conditions specified by the manufacturer, the output voltage range of the fuel cell power system from startup, operation to shut down.
3.7
Continuous running time
Under normal operating conditions specified by the manufacturer, the
continuous time that the output voltage of the fuel cell power system does not exceed the output voltage range when operating at the rated output
power.
3.8
Fuel storage module
Pressure device used to store hydrogen (such as hydrogen cylinder).
3.9
Fuel supply module
The assembly of all the components, pipe connections and controls which is used to deliver hydrogen to the fuel cell hydrogen inlet, from the hydrogen cylinder to the stack hydrogen inlet.
Note: The fuel supply module consists of some or all of the following
components: stop valve, filter (optional), solenoid valve (optional), pressure reducing valve, fuse valve (optional), overflow valve (optional), pressure relief valve (optional), one-way valve (optional), fuel filling interface, pressure sensor, temperature sensor (optional), pressure gauge (optional), flow meter (optional), electronic control device (optional) etc.
3.10
Hydrogen leakage ratio
The ratio of the amount of hydrogen leakage to the theoretical amount of hydrogen required by the fuel cell power system at rated power.
3.11
Alarm
The function of transmitting the alarm status and fault status to the alarm device and giving sound and light alarm.
4 General requirements
4.1 General
The schematic diagram of the boundary of the proton exchange membrane fuel cell power system for unmanned aerial vehicle is as shown in Figure 1.
Input power
Vibration, wind,
rain, temperature,
humidity, etc.
Residual
heat
Vibration,
noise
Output
power
Drainage
water
Electromagnetic
disturbance Electromagnetic disturbance
Air
Water
Fuel
storage
module Thermal manageme
nt module
Internal
power
demand
Power
regulating
module
Auxiliary
energy
storage
module
Fuel
supply
module Fuel cell
module
Air supply
module
Water
manageme
nt module
Control
module
Ventilation
module
Figure 1 -- Schematic diagram of the boundary of the hydrogen fuel cell power system for unmanned aerial vehicles
According to actual needs, the fuel cell power system for unmanned aerial vehicle consists of some or all of the following modules:
- Fuel cell module (mandatory): It is composed of one or more stacks,
electrical connection devices that transmit the electricity as generated by the stacks, monitoring devices, etc.;
- Air supply module (mandatory): The general name of the device that
measures, regulates, pressurizes, or treats otherwise the air required by the fuel cell power system;
- Fuel storage module (mandatory): A device for storing hydrogen;
- Fuel supply module (mandatory): The assembly of all components, pipe
connections and their controls from the hydrogen cylinder to the hydrogen inlet of stacks which is used for storing hydrogen and transporting hydrogen to the hydrogen inlet of the fuel cell;
- Control module (mandatory): A module composed of sensors, actuators,
valves, switches and logic elements, which is used to maintain the
parameters of the fuel cell power system within the manufacturer's setting range without manual intervention;
- Thermal management module (optional): The relevant components which
provide cooling and heat dissipation functions to keep the interior of the fuel cell power system in the normal temperature range, meanwhile recover
residual heat, heat the relevant components of the system during startup when necessary;
- Water management module (optional): A module that manages the water
required or produced by the fuel cell system;
- Power regulating module: A module used to match the electric energy
generated by the stack module and the auxiliary energy storage module
with the specified electricity demand;
- Ventilation module (optional): A module that delivers air to the space around the fuel cell power system through natural or mechanical methods;
- Auxiliary energy storage module (optional): The energy storage device inside the system, which is used to store electrical energy, start the fuel cell power system, cooperate with the fuel cell module to supply power to
internal or external loads.
4.2 General safety requirements
4.2.1 The design and manufacture of fuel cell power systems shall fully consider the safety risks of various failures and/or accidents that may be encountered during normal or abnormal use; take corresponding measures to avoid safety risks or reduce safety risk to an acceptable degree.
4.2.2 For possible safety risks, the fuel cell power system shall provide safety reminders or sound, light, electricity and other warning signals; provide automatic and/or manual handling measures.
4.2.3 For the heating components of the fuel cell power system, it shall take corresponding measures to avoid personal injury caused by contact with or close to hot surface components.
4.2.4 The design of the fuel cell power system shall ensure that a single failure of the system components will not be escalated. Methods to prevent failure escalation include but are not limited to:
- Install protective devices (such as interlocking protective devices and tripping devices) in the fuel cell power system;
- Set the protective interlock function of the circuit;
- Use proven technologies and components;
- Provide partial or complete redundant devices or diversify the protective measures;
- Issue an alarm to the superior system of the fuel cell power system.
4.2.5 The main components that make up the fuel cell power system for
unmanned aerial vehicles shall meet the specific safety requirements of their respective fields. For details, refer to the following documents:
- The safety of fuel cell modules shall be in accordance with the requirements specified in GB/T 36288-2018;
- The control device components shall be designed in accordance with the provisions of GB/T 20438.1;
- The hose and hose assembly shall meet the requirements of the type 1TE hose in GB/T 15329-2019;
- Metal pipelines and their connecting parts shall meet the requirements of GB/T 20972.1.
4.3 Appearance and structure
4.3.1 The appearance of the fuel cell power system shall be clean, free of mechanical damage, free of cracks, stains and obvious deformation; there is no rust on the interface contacts.
4.3.2 The accessible parts of the fuel cell power system shall not have sharp edges and corners that may cause personal injury.
4.3.3 During the normal operation of the fuel cell power system, its parts and their connectors shall be stable and reliable; there shall be no instability, deformation, fracture or wear.
4.3.4 The communication interface, power interface, user interface, hydrogen inlet and outlet of the fuel cell power system shall be clearly identified. 4.3.5 The positive and negative terminals and polarity of the fuel cell power system shall be clearly identified for easy connection.
4.4 Other general technical requirements
4.4.1 Environmental requirements for the use of fuel cell power systems: temperature: -5 ??C ~ 40 ??C; relative humidity: ??? 100%; altitude: ??? 3000 m. 4.4.2 The fuel cell power system shall be able to provide sufficient power for the normal flight of the unmanned aerial vehicles.
4.4.3 In the case of normal transmission of communication signals, the fuel cell power system itself or the communication system through the unmanned aerial vehicles shall be able to communicate normally with the ground control system. 4.4.4 The main parameters of the fuel cell power system shall be able to be monitored in real time.
4.4.5 In the case that the unmanned aerial vehicles and the ground control system lose communication, the fuel cell power system shall be able to continue to provide power for the unmanned aerial vehicles and execute the
predetermined plan.
4.4.6 The hydrogen cylinders in the fuel cell power system shall have detailed filling records during use.
4.4.7 The minimum design burst pressure of the hydrogen cylinder in the fuel cell power system and the design fatigue resistance counts of the hydrogen cylinder shall meet the relevant requirements of the national standards; in the absence of these standards, please refer to Appendix A.
5 Technical requirements
5.1 Start-up time
The start-up time of the fuel cell power system shall be less than 1 min. 5.2 Time to reach rated power
When the ambient temperature is higher than 0 ??C, the time for the fuel cell power system to reach the rated power shall be less than 1 min.
When the ambient temperature is -5 ??C ~ 0 ??C, the time for the fuel cell power system to reach the rated power shall be less than 5 minutes.
5.3 Rated output power
The rated output power of the fuel cell power system shall not be lower than the manufacturer's indicated value; at this power, the continuous operation time of the fuel cell power system shall not be lower than the manufacturer's indicated value.
In the specified minimum continuous operation time, the output power of the fuel cell power system shall be maintained at ??5% of the nominal rated output power.
5.4 Power overload rate
The fuel cell power system shall be able to continuously output more than 2 minutes at 150% of the rated output power.
5.5 Output voltage range
The output voltage of the fuel cell power system shall be within the output voltage range of the fuel cell power system as indicated by the manufacturer. 5.6 Power efficiency
Under the rated power output, the power efficiency of the fuel cell power system shall be greater than 40%.
5.7 Startup/shutdown method
The fuel cell power system shall have at least one of the following
startup/shutdown methods:
- Manual;
- Remote control;
- Automatic.
5.8 Shutdown time
The shutdown time of the fuel cell power system shall be less than 2 minutes. 5.9 Continuous operation time
The continuous operation time of the fuel cell power system used on the fixed- wing unmanned aerial vehicle shall not be less than 6 h. The continuous operation time of the fuel cell power system used on the multi-rotor unmanned aerial vehicle shall not be less than 3 h. The continuous operation time can also be determined according to the fuel cell power system?€?s purchase agreement. 5.10 Noise
Under the rated power output, the noise of the fuel cell power system shall not exceed 78 dB.
5.11 Vibration resistance
Under normal operating conditions, the fuel cell power system shall be able to resist vibration; keep its mechanical and electrical connections normal; the hydrogen leakage rate shall meet the requirements in 5.19; the fuel
concentration in the cabin shall meet the requirements in 5.15.
5.12 Electromagnetic compatibility limits
The electrostatic discharge immunity limit of fuel cell power system shall meet the requirements of test level 3 in GB/T 17626.2-2018. During the test, the sample under test shall not be damaged, malfunction or change of state; however, the indicator light is allowed to flash; the system shall work normally after the test.
The radio-frequency electromagnetic field radiation immunity limit of...

View full details