GB/T 38775.1-2020 PDF English
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Electric Vehicle Wireless Power Transfer - Part 1: General Requirements
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GB/T 38775.1-2020: Electric Vehicle Wireless Power Transfer - Part 1: General Requirements---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT38775.1-2020
NATIONAL STANDARD OF THE
PEOPLE’S 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’s 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
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)
GB 4943.1-2011 Information Technology Equipment - Safety - Part 1.General
Requirements
GB/T 7251.1-2013 Low-voltage Switchgear and Control-gear 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
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
Secondary device refers to an energy receiving terminal, a device that is coupled to
the primary device to receive the alternating electromagnetic field and convert it into
electrical energy.
3.3 Wireless Power Transfer; WPT
Wireless power transfer refers to a power supply mode that implements the
transmission of electrical energy from the power supply end to the electrical equipment
by means of spatial invisible soft medium (such as. electric field, magnetic field and
microwave, etc.).
NOTE. wireless power transfer is also known as contactless power transfer (CPT).
3.4 Electric Vehicle Wireless Power Transfer
Electric vehicle wireless power transfer refers to the use of AC or DC power grid (power
supply) to provide power for electric vehicle power batteries and on-board devices
through wireless power transfer technology.
3.5 Off-board Power Components
Off-board power components refer to power conversion unit that converts the electrical
energy of the power grid into the electrical energy required by the primary device.
3.6 On-board Power Components
On-board power components are installed on the vehicle to convert the electrical
energy received by the secondary device into DC power through the power converter
and supply it to electric vehicles.
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.
5.2 Schematic Diagram
Figure 2 provides a schematic diagram of the principle of an AC input electric vehicle
wireless power transfer system. The electric vehicle wireless power transfer system
chart is shown in Appendix A. An example of magnetic coupling is shown in Appendix
B.
5.3 Principle of Measurement
5.3.1 Coordinate system
The three-dimensional coordinate system that describes the primary and the
secondary device is shown in Figure 3.The X-axis is the driving direction. +X signifies
the rear direction of vehicle. The Y-axis is perpendicular to the driving direction. The Z-
axis is the height. The origin of the coordinate system is the reference point.
5.3.2 Parking location
The installation location of the primary device is shown in Figure 4.The description of
the parameters is shown in Table 2.
5.3.3 Offset
The offset in X and Y direction is the deviation between the center point of the
secondary side and the zero point, as it is shown in Figure 5.The description of the
parameters is shown in Table 3.
5.3.4 Size measurement of primary device
The definition of size measurement of primary device is shown in Table 4.
5.3.5 Measurement of mechanical air gap
The measurement of mechanical air gap is shown in Table 5.
5.4 Installation of Primary Device
5.4.1 Installation mode
The installation mode of primary device includes.
5.4.3 Above-ground installation
Above-ground installation is shown in Figure 7.The primary device is installed with a
certain height above the ground. The installation height above the pavement is
specified by the manufacturer’s installation guidelines.
6 Classification
6.1 Classification Basis
In this Part, the classification basis for magnetically coupled electric vehicle wireless
power transfer system has the following two factors.
6.2 Power Level
The classification by input power level of magnetically coupled electric vehicle wireless
power transfer system is shown in Table 8.
6.3 Environmental Conditions
In accordance with purposes and environmental conditions, off-board supply devices
of magnetically coupled electric vehicle wireless power transfer system may be
classified into.
7 Interoperability Requirements
7.1 General Requirements
When off-board supply devices and on-board supply devices satisfy the following
conditions, they are interoperable, and the off-board supply devices can implement
wireless transmission of electrical energy to electric vehicles.
7.2 Power Level
The interoperability requirements between off-board supply devices and on-board
supply devices of the same power level and different power levels are shown in Table 9.
7.3 Rated Working Frequency
Interoperable off-board supply devices and on-board supply devices shall use the
same rated working frequency.
7.4 Resonant Circuit
The resonant circuit topology of the primary device shall match the resonant circuit
topology of the secondary device.
7.5 Tuning (optional)
The operating frequency of the electric vehicle wireless power transfer system should
be tuned.
7.6 System Efficiency
Interoperability requires that system efficiency shall be not less than the minimum limit
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.
9.2 Operating Environment Temperature Requirements
The wireless power transfer devices shall be tested under the specified ambient
temperature, the highest and the lowest temperature.
9.3 Environmental Humidity Test
The wireless power transfer devices shall be designed to operate between 5% ~ 95%
relative humidity. In accordance with different installation environments, one of the
following two tests shall be selected.
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.
9.5 Low Temperature Test
The low temperature test shall comply with test Ab in GB/T 2423.1.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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