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GB/T 38775.1-2020 English PDF (GBT38775.1-2020)

GB/T 38775.1-2020 English PDF (GBT38775.1-2020)

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GB/T 38775.1-2020: Electric vehicle wireless power transfer -- Part 1: General requirements

This Part of GB/T 38775 specifies the overall requirements, classification, interoperability requirements, communication requirements, environmental testing, safety requirements, structural requirements, material and component strength requirements, identification and description requirements of wireless power transfer system of electric vehicles.
GB/T 38775.1-2020
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 43.040
T 35
Electric Vehicle Wireless Power Transfer -
Part 1: General Requirements
ISSUED ON: APRIL 28, 2020
IMPLEMENTED ON: NOVEMBER 1, 2020
Issued by: State Administration for Market Regulation;
Standardization Administration of the PEOPLE Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 6
4 Abbreviations ... 9
5 Overall Requirements for Power Transfer System ... 9
6 Classification ... 16
7 Interoperability Requirements ... 17
8 Communication Requirements ... 19
9 Environmental Tests ... 19
10 Safety Requirements ... 21
11 Structural Requirements ... 30
12 Strength Requirements for Materials and Components ... 31
13 Marking and Description Requirements ... 33
Appendix A (informative) Electric Vehicle Wireless Power Transfer System Chart ... 35
Appendix B (informative) Magnetic Coupling ... 37
Electric Vehicle Wireless Power Transfer -
Part 1: General Requirements
1 Scope
This Part of GB/T 38775 specifies the overall requirements, classification, interoperability requirements, communication requirements, environmental testing, safety requirements, structural requirements, material and component strength requirements, identification and description requirements of wireless power transfer system of electric vehicles
This Part is applicable to stationary magnetic coupling wireless power transfer system of electric vehicles, with the maximum rated voltage of power supply of 1,000 V (AC) or 1,500 V (DC); the maximum rated output voltage of 1,000 V (AC) or 1,500 V (DC). 2 Normative References
The following documents are indispensable to the application of this document. In terms of references with a specified date, only versions with a specified date are applicable to this document. In terms of references without a specified date, the latest version (including all the modifications) is applicable to this document. GB/T 156 Standard Voltages
GB/T 2423.1 Environmental Testing for Electric and Electronic Products - Part 2: Test Methods - Test A: Cold
GB/T 2423.2 Environmental Testing for Electric and Electronic Products - Part 2: Test Methods - Test B: Dry Heat
GB/T 2423.3 Environmental Testing for Electric and Electronic Products - Part 2: Test Methods - Test Cab: Damp Heat, Steady State
GB/T 2423.4 Environmental Testing for Electric and Electronic Products - Part 2: Test Methods - Test Db: Damp Heat, Cyclic (12 h + 12 h cycle)
GB/T 2423.17 Environmental Testing for Electric and Electronic Products - Part 2: Test Methods - 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)
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
What is defined in GB/T 19596, and the following terms and definitions are applicable to this document.
3.1 Primary Device
Primary device refers to an energy transmitting terminal, a device that is coupled to the secondary device to convert electrical energy into an electromagnetic field and directionally transmit it.
3.2 Secondary Device
3.14 System Efficiency
System efficiency refers to the efficiency of power transmission from AC (or DC) power input to electric vehicle?€?s battery / on-board supply device.
NOTE: the measuring points of system efficiency are shown in Figure 2.
3.15 Protection Areas
Protection areas refer to areas with the same kind of protection demands in and around an electric vehicle.
4 Abbreviations
The following abbreviations are applicable to this document.
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 Overall Requirements for Power Transfer System
5.1 General Requirements
General requirements for the power transfer system include:
a) The voltage level of off-board power supply device shall comply with the standard nominal voltage specified in GB/T 156. Specifically speaking, the alternating current frequency is 50 Hz ?? 1 Hz; other frequencies may be used for alternating current with special purposes.
b) On-board device shall have a good coupling with off-board supply device, through which, the safe operation of the electric vehicle wireless power transfer system can be ensured.
set by the manufacturer at the rated operating point and under the offset conditions. The rated operating point of the electric vehicle wireless power transfer system shall satisfy the following conditions:
a) System output at the rated power;
b) The primary and the secondary devices shall be in alignment;
c) The operational air gap is the only value set or specified by the manufacturer. 8 Communication Requirements
There shall be the capability of wireless communication between the off-board supply devices and on-board supply devices of the electric vehicle wireless power transfer system. Through the signaling, the control of the wireless electrical energy transmission process and the exchange of necessary relevant information are implemented, so as to ensure the safe and reliable operation of the electric vehicle wireless power transfer system.
9 Environmental Tests
9.1 General Requirements
Among the tests required in this Chapter, wireless power transfer devices shall be operated at the nominal voltage, the maximum output power and current, and the safety characteristics shall not be reduced. The environmental testing and related design of the wireless power transfer system shall satisfy:
a) The power supply devices of the electric vehicle wireless power transfer system are designed to satisfy the use of the wireless power transfer system under normal operating conditions.
b) The tests of the wireless power transfer devices shall be conducted under the atmospheric pressure of 86 kPa ~ 106 kPa.
c) The tests of the wireless power transfer devices shall be conducted below the altitude of 2,000 m. In terms of devices which are used above the altitude of 2,000 m, the reduction in dielectric strength, the switching capacity of the devices, the cooling effect of the air and the de-rated operation of the devices shall be taken into consideration.
d) In terms of enclosed devices and components for outdoor and indoor
installations, if they are used in environments with high humidity and a large range of temperature variation, measures shall be taken to prevent the
generation of harmful condensation in the devices. Measures like ventilation 2) 2 cycles of 24 h salt mist test: comply with GB/T 2423.17; temperature is (35 ?? 2) ??C (test Ka: salt mist).
b) Humidity test for outdoor installation
When the temperature is 25 ??C, the highest relative humidity may be 100%. The following test conditions shall be passed:
1) 5 cycles of 24 h damp heat cyclic test: comply with GB/T 2423.4-2008; temperature is (40 ?? 3) ??C; relative humidity is 95% (test Db);
2) 7 cycles of 24 h salt mist test: comply with GB/T 2423.17; temperature is (35 ?? 2) ??C (test Ka: salt mist).
9.4 Dry Heat Test
In accordance with the requirements in 10.2.3.1 of GB/T 7251.1-2013, conduct the dry heat test. The test shall comply with the requirements of test Sa, Process B in GB/T 2423.24.
NOTE: dry heat test may be combined with thermal stability test of enclosure. 9.5 Low Temperature Test
The low temperature test shall comply with test Ab in GB/T 2423.1:
a) Outdoor devices: -20 ??C ?? 3 ??C, operate for 16 h.
b) Indoor devices: -5 ??C ?? 3 ??C, operate for 16 h.
When the operating environment of the devices is lower than the above specified temperature, in accordance with the demands, the low temperature test of extreme cold climates shall be conducted according to GB/T 2423.1 (test Ab); run at the lowest rated temperature defined by the manufacturer for 16 h.
10 Safety Requirements
10.1 General Requirements
Among the tests in this Chapter, in terms of tests involving the electric vehicle wireless power transfer system in the operating state, the system shall be operated at the rated voltage, and the maximum output power and current. If the devices are designed to operate at multiple different rated voltages, the tests shall be conducted at the maximum rated voltage being supported.
10.2 Requirements for Protection against Electric Shock
accessible metal parts (fixed)
Between inaccessible and accessible non-charged metal parts
Between inaccessible and accessible metal parts that are fixedly
connected together and externally insulated metal foil (additional
insulation)
Inapplicable 0.5 mA
NOTE: live electrode does not include coils in the primary device, and connectors and connecting cables of the coil in the primary device under the operating state of the system.
10.2.3 Requirements for insulation resistance
Use a test instrument, whose open-circuit voltage is the voltage level specified in Table 11 for measurement. The insulation resistance between the non-electrically connected live circuits of the electric vehicle wireless power transfer system, and between each independent live circuit and the ground (metal casing) shall not be less than 500 ???/V. 10.2.4 Requirements for dielectric strength
10.2.4.1 Dielectric compressive strength
Between the non-electrically connected live circuits of the electric vehicle wireless power transfer system, and between each independent live circuit and the ground (metal casing), in accordance with its working voltage, it shall be able to withstand the power-frequency voltage-withstand test for 1 min specified in Table 11. During the test, there shall be no insulation breakdown or arcing.
10.2.4.2 Impulse withstand voltage
Between the live circuits of the electric vehicle wireless power transfer system, and between each live circuit and the ground (metal casing), in accordance with its working voltage, it shall be able to withstand the short-term impulse voltage test of the specified standard lightning strike wave. The voltage level of the impulse withstand voltage test is shown in Table 11.
In accordance with the stipulations of Table 11, apply short-term impulse voltage of positive standard lightning wave for 3 times and negative standard lightning wave for 3 times between the non-electrically connected live circuits of the control cabinet of the wireless power transfer system, and between each independent live circuit and the ground (metal casing). Each time, the interval shall be not less than 5 s. During the test, the other circuits and the exposed conductive parts are grounded; the test part shall not manifest any breakdown or discharge; flashover that does not cause damage to the insulation is allowed. If flashover occurs, then, the dielectric strength shall be reviewed; the dielectric strength test voltage is 75% of the specified value. two shall prevail.
10.2.6 Energy storage - capacitor discharge
In terms of portable wireless power transfer system, within 1 s after the standard plug is disconnected from the standard socket, the voltage between any accessible conductive part of the standard plug and the protective conductor shall be not greater than 60 V (DC), or, the equivalent stored charge shall be less than, or equals to 0.2 J. 10.2.7 Fault protection
The fault protection mode shall comply with GB/T 16895.21-2011.
10.2.8 Protective grounding conductor
In terms of the off-board part of the electric vehicle wireless power transfer system, there shall be a protective conductor to establish an equipotential connection between the grounding terminal of the main power supply and the externally connected exposed conductive part. This protective grounding conductor shall satisfy the requirements of GB/T 16895.3.
10.2.9 Supplementary measures
10.2.9.1 Additional protection
In order to avoid electric shock caused by the failure of the basic protection or fault protection, or user?€?s mis-operation, there shall be additional protection. In addition to circuits using electrical isolation protective measures, the off-board supply devices shall adopt Type-A or Type-B residual current operated circuit-breakers (RCD). RCD shall comply with relevant requirements of GB/T 14048.2-2008, GB/T 16917.1-2014, GB/T 16916.1-2014 and GB/T 22794-2017.
10.2.9.2 Manual / automatic reset requirements
Circuit breakers, RCD and other devices that provide personal protection against electric shock shall not be automatically reset.
10.2.10 Telecommunication network requirements
If there is any telecommunication network or telecommunication port in the electric vehicle wireless power transfer system, the test shall comply with the requirements for telecommunication network in Chapter 6 of GB 4943.1-2011.
10.3 Overload Protection and Short-circuit Withstanding Requirements
10.3.1 General requirements
Overload protection and short-circuit withstanding requirements include: a) In AC application, the category of use shall be not lower than AC-2; b) In DC application, the category of use shall be not lower than DC-3. 11.2.3 Circuit breakers and relays
Circuit breakers and relays shall comply with the requirements of GB/T 10963.1-2005. 11.3 Structural Requirements for On-board Supply Devices
The temperature resistance of on-board supply devices shall satisfy relevant stipulations of 3.10 in QC/T 413-2002.
The resistance to temperature and humidity changes of on-board supply devices shall satisfy relevant stipulations of 3.11 in QC/T 413-2002.
The vibration resistance of on-board supply devices shall satisfy relevant stipulations of 3.11 in QC/T 413-2002.
11.4 Requirements for Power Cable Components
In terms of portable electric vehicle wireless power transfer system, in addition to cable components, cable extension components shall not be used to connect primary devices and power supply devices.
12 Strength Requirements for Materials and
Components
12.1 Anti-corrosion Protection
Under the normal use of the wireless power transfer system, anti-corrosion protection shall be ensured by using suitable materials or protective coatings for exposed surfaces.
Test samples shall comply with the clean state specified in the test procedure in 10.2.2.1 of GB/T 7251.1-2013, and satisfy:
a) Rigorous test A of indoor devices; see 10.2.2.2 of GB/T 7251.1-2013 for details;
b) Rigorous test B of indoor devices; see 10.2.2.3 of GB/T 7251.1-2013 for details.
Devices submitted for inspection shall satisfy the tests in 10.2.2.1 and 10.2.2.4, and 10.2.2.2 (indoor) or 10.2.2.3 (outdoor) of GB/T 7251.1-2013.
12.2 Inspection of Enclosure
the functions of the device;
c) The device or its cable clamp cannot provide suitable tension to the power supply cable;
d) Other damages that might result in fire or electric shock risks.
13 Marking and Description Requirements
13.1 General Requirements
Marking and description shall comply with the requirements of Chapter 12. Devices shall be marked with grades or other information that can indicate rigorous or unusual environmental conditions during the operation, see Chapter 12.
13.2 Device Marking
Off-board supply devices shall be marked in a distinct mode, but not limited to the following marks:
a) Company name, abbreviation, trademark or logo, which can clearly identify the manufacturer; (required)
b) Device label, product No.; (required)
c) Serial No. or production batch No.; (required)
d) Date of manufacturer; (required)
e) Power level; (required)
f) Rated input AC or DC; (required)
g) Rated working frequency (kHz); (required)
h) Rated output current (A), rated output voltage (V); (required)
i) Marking of indoor use or outdoor use; (required)
j) Interoperability-related information, which shall at least include: input power level, operational air gap, rated working frequency, type of coil and topology of compensating circuit; (required)
k) Number of input phases; (optional)
l) IP level (protection level); (optional)
m) All necessary information related to categories, characteristics and product

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