Detail of GB/T 38775.1-2020

Introduction of GB/T 38775.1-2020

Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative. GB/T 38775 consists of the following 4 parts under the general title of Electric vehicle wireless power transfer: ——Part 1: General; ——Part 2: Communication protocols between on-board charger and wireless power transfer device ——Part 3: Specific requirements ——Part 4: Limits and test methods of electromagnetic environment This is Part 1 of GB/T 38775. This part is developed in accordance with the rules given in GB/T 1.1-2009. This part was proposed by the Ministry of Industry and Information Technology of the People's Republic of China. This part is under the jurisdiction of the National Technical Committee on Automobiles of Standardization Administration of China (SAC/TC 114). Electric vehicle wireless power transfer – Part 1: General requirements 1 Scope This part of GB/T 38775 specifies the general requirements, classification, interoperability requirements, communication requirements, environmental testing, safety requirements, structural requirements, material and component strength requirements, identification and description requirements for electric vehicle wireless power transfer system. This part is applicable to the static magnetically coupled wireless power transfer system for electric vehicles, whose power supply has a maximum rated voltage of 1,000 V(AC) or 1,500 V(DC) and a maximum rated output voltage of 1,000 V(AC) or 1,500 V(DC). 2 Normative references The following referenced documents are indispensable for the application 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 156 Standard voltages GB/T 2423.1 Environmental testing for electric and electronic products-Part 2: Test methods-Tests A: Cold GB/T 2423.2 Environmental testing - Part 2: Test methods - Tests B: Dry heat GB/T 2423.3 Environmental testing-Part2: Testing method-Test Cab: Damp heat, steady state GB/T 2423.4 Environmental testing for electric and electronic products - Part 2: Test method - Test Db: Damp heat, cyclic (12h+12h cycle) GB/T 2423.17 Environmental testing for electric and electronic products - Part 2: Test method - Test Ka: Salt mist GB/T 2423.24 Environmental testing - Part 2: Test methods - Test Sa: Simulated solar radiation at ground level and guidance for solar radiation testing GB/T 4208 Degrees of protection provided by enclosure (IP code) GB 4943.1-2011 Information technology equipment - Safety - Part 1: General requirements GB/T 7251.1-2013 Low-voltage switchgear and controlgear assemblies - Part 1: General rules GB/T 10963.1-2005 Electrical accessories-Circuit-breakers for overcurrent protection for household and similar installation Part 1: Circuit-breakers for a.c. operation GB/T 11021-2014 Electrical insulation―Thermal evaluation and designation GB/T 11026.1-2016 Electrical insulating materials -Thermal endurance properties- Part 1: Ageing procedures and evaluation of test results GB/T 12113-2003 Methods of measurement of touch current and protective conductor current GB/T 14048.2-2008 Low-voltage switchgear and controlgear - Part 2: Circuit-breakers GB/T 14048.3-2017 Low-voltage switchgear and controlgear-Part 3: Switches, disconnectors, switch-disconnectors and fuse-combination units GB/T 14048.4-2010 Low-voltage switchgear and controlgear—Part 4-1:Contactors and motor-starters—Electromechanical contactors and motor-starters(Including motor protector) GB/T 16895.2 Low-voltage electrical installations-Part 4-42:Protection for safety-Protection against thermal effects GB/T 16895.3 Low-voltage electrical installations - Part 5-54: Selection and erection of electrical equipment-Earthing arrangements and protective conductors GB/T 16895.5-2012 Low-voltage electrical installations - Part 4-43: Protection for safety - Protection against overcurrent GB/T 16895.10-2010 Low-voltage electrical installations - Part 4-44: Protection for safety - Protection against voltage disturbances and electromagnetic disturbances GB/T 16895.21-2011 Low-voltage electrical installations - Part 4-41: Protection for safety-Protection against electric shock GB/T 16916.1-2014 Residual current operated circuit-breakers without integral overcurrent protection for household and similar uses (RCCB) - Part 1: General rules GB/T 16917.1-2014 Residual current operated circuit-breakers with integral overcurrent protection for household and similar uses (RCBOs)—Part 1: General rules GB/T 17627.1-1998 High-voltage test techniques for low voltage equipment--Part 1:Definitions，test and procedure requirements GB/T 19596 Terminology of electric vehicles GB/T 22794-2017 Type F and type B residual current operated circuit-breakers with and without integral overcurrent protection for household and similar uses GB/T 30789.2 Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and size of defects, and of intensity of uniform changes in appearance - Part 2: Assessment of degree of blistering GB/T 30789.3 Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and size of defects, and of intensity of uniform changes in appearance - Part 3: Assessment of degree of rusting GB/T 30789.4 Paints and varnishes-Evaluation of degradation of coatings-Designation of quantity and size of defects, and of intensity of uniform changes in appearance-Part 4:Assessment of degree of cracking GB/T 30789.5 Paints and varnishes-Evaluation of degradation of coatings-Designation of quantity and size of defects, and of intensity of uniform changes in appearance-Part 5: Assessment of degree of flaking GB/T 33594-2017 Charging cables for electric vehicles QC/T 413-2002 Basic Technical Requirements for Automotive Electric Equipment IEC 60364-7-722:2015 Low-voltage electrical installations - Part 7-722: Requirements for special installations or locations - Supplies for electric vehicles 3 Terms and definitions For the purposes of this document, the terms and definitions given in GB/T 19596 and the following apply. 3.1 primary device transmitting terminal of energy, which is the device coupled with the secondary device to convert the electric energy into an alternating electromagnetic field and transmit it directionally 3.2 secondary device receiving terminal of energy, which is the device coupled with the primary device to receive alternating electromagnetic field and convert it into electric energy 3.3 wireless power transfer; WPT a power supply mode that realizes the transfer of electric energy from the power supply terminal to the electrical equipment by means of intangible soft space medium (e.g., electric field, magnetic field, microwave, etc.) Note: Wireless power transfer technology may also be called contactless power transfer (CPT). 3.4 electric vehicle wireless power transfer supply of electric energy for the power battery of electric vehicle by AC or DC power grid (power supply) via wireless power transfer technology, which may also be used to supply power for on-board supply device 3.5 off-board power components power conversion unit that converts electric energy of the power grid into electric energy required by the primary device 3.6 on-board power components components installed on the vehicle, which converts the electric energy received by the secondary device into direct current through power converter so as to power the electric vehicle 3.7 off-board supply device generic term for off-board devices of electric vehicle wireless power transfer system Note: Off-board supply devices include primary devices, off-board power components, communication units, etc. 3.8 on-board supply device generic term for on-board devices of electric vehicle wireless power transfer system Note: On-board supply devices include secondary devices, on-board power components, communication units, etc. 3.9 wireless charging spot generic term for off-board supply facilities that provide wireless charging service for an electric vehicle Note: Wireless charging spots include parking spaces, off-board supply devices and other auxiliary facilities (e.g., device wells accommodating primary devices, off-board limiting devices, positioning auxiliary equipment, etc.). 3.10 mechanical air gap the shortest distance between the upper surface of the primary device and the lower surface of the secondary device 3.11 operational air gap distance between the upper surface of the magnetic field transmitting coil of the primary device and the lower surface of the magnetic field receiving coil of the secondary device 3.12 foreign objects any object between the primary device and the secondary device, which is neither part of the electric vehicle nor part of the electric vehicle wireless charging spot 3.13 arm's reach vertical distance from the ground to the fingertip of a person, or one-third of this distance in any direction (see Figure 1) Key: a——the distance when a person stretches the body completely; b——the distance of a person to reach something. Figure 1 Arm's reach 3.14 system efficiency efficiency of power transfer from AC (or DC) power supply input to battery/on-board supply device of electric vehicle Note: See Figure 2 for the measuring points of system efficiency. 3.15 protection areas areas with the same kind of protection requirements in and around an electric vehicle 4 Abbreviations For the purposes of this document, the following abbreviations apply. CSU: Communication Service Unit CB: Circuit Breaker EMC: Electromagnetic Compatibility EMF: Electromagnetic Fields IVU: In-Vehicle Unit MF-WPT: Wireless Power Transfer Through Magnetic Field RCBO: Residual Current Circuit Breaker with Overcurrent Protection RCD: Residual Current Device 5 General requirements for power transfer system 5.1 General The general requirements for power transfer system include: a) The voltage class of off-board supply device shall conform to the standard nominal voltage specified in GB/T 156. The alternating current frequency is 50Hz±1Hz, and other frequencies may be used for the alternating current for special purposes. b) The on-board supply device shall have good coupling with the off-board supply device, so as to ensure the safe operation of the electric vehicle wireless power transfer system. c) The off-board supply device of the electric vehicle wireless power transfer system shall ensure stable performance during normal use, and shall also be able to ensure the safety of the users of the electric vehicle wireless power transfer system and the surrounding environment to the greatest extent. 5.2 Schematic diagram Figure 2 shows the schematic diagram for a wireless power transfer system of AC input electric vehicles. See Annex A for the block diagram of the electric vehicle wireless power transfer system. See Annex B for an example of magnetic coupling.

Contents of GB/T 38775.1-2020

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Abbreviations 5 General requirements for power transfer system 5.1 General 5.2 Schematic diagram 5.3 Measurement principle 5.4 Installation of primary device 6 Classification 6.1 Classification bases 6.2 Power level 6.3 Environmental conditions 7 Interoperability requirements 7.1 General 7.2 Power level 7.3 Rated operating frequency 7.4 Resonant circuit 7.5 Tuning (optional) 7.6 System efficiency 8 Communication requirements 9 Environmental testing 9.1 General 9.2 Requirement for operating ambient temperature 9.3 Ambient humidity test 9.4 Dry heat test 9.5 Low temperature test 10 Safety requirements 10.1 General 10.2 Requirements for electric shock protection 10.3 Requirements for overload protection and short circuit withstand 10.4 Requirements for temperature rise and overheating prevention 10.5 Protection requirements for mechanical accidents 10.6 Protection areas 11 Structural requirements 11.1 General 11.2 Requirements for breaking capacity of switchgears 11.3 Structural requirements for on-board supply device 11.4 Requirements for power cable components 12 Material and component strength requirements 12.1 Corrosion protection 12.2 Enclosure inspection 12.3 Vehicle rolling 13 Identification and description requirements 13.1 General 13.2 Identification of device Annex A (Informative) Block diagram for electric vehicle wireless power transfer system Annex B (Informative) Magnetic coupling