GB/T 38775.1-2020

Electric vehicle wireless power transfer—Part 1:General requirements (English Version)

Standard No.

GB/T 38775.1-2020

Language

Chinese, Available in English version

Release Date

2020

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Latest

GB/T 38775.1-2020

Scope

This part of GB/T38775 specifies the overall requirements, classification, interoperability requirements, communication requirements, environmental testing, safety requirements, structural requirements, material and component strength requirements, labeling and description requirements, etc. for electric vehicle wireless charging systems. This section applies to the static magnetic coupling wireless charging system of electric vehicles. The maximum rated voltage of the power supply is 1000V (AC) or 1500V (DC), and the maximum rated output voltage is 1000V (AC) or 1500V (DC).

Introduction

Interpretation of the core content of the standard

Technical dimensions	Indoor equipment requirements	Outdoor equipment requirements	Test methods
Operating temperature	-5℃~50℃	-20℃~50℃	GB/T2423.1/2
Protection grade	IP32	IP54	GB/T4208
Salt spray test	2 cycles	7 cycles	GB/T2423.17

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Detailed explanation of key technical indicators

1. Power level classification

The standard divides the system into 7 power levels (MF-WPT1~7), among which MF-WPT3 and above require the use of three-phase power supply, and the highest power level MF-WPT7 corresponds to high-power application scenarios of >66kW.

2. Interoperability requirements

The realization of interoperability needs to meet three core conditions:

1. Matched primary equipment and secondary equipment power levels
2. Working air gap deviation is controlled within ±100mm (X/Y axis)
3. System efficiency is ≥85% under rated conditions

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Safety protection system

1. Electric shock protection

A three-level protection mechanism is adopted:

• Basic protection: IPXXC shell protection
• Fault protection: residual current device (RCD)
• Additional protection: non-automatic reset circuit breaker

2. Thermal safety control

Temperature rise limit of key components:

• Winding: H-class insulation ≤130K
• Terminal: ≤35K
• Contactable surface: metal ≤55℃/non-metal ≤65℃

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Implementation suggestions

1. Equipment selection guide

Select the appropriate power level according to the application scenario:

• Home charging: MF-WPT1(≤3.7kW)
• Public charging pile: MF-WPT4(11.1~22kW)
• Fast charging station: MF-WPT7(>66kW)

2. Installation precautions

Underground installation must ensure:

1. Primary equipment IP67 and above protection
2. Mechanical air gap ≥ 150mm
3. Concrete cover thickness ≥ 100mm

GB/T 38775.1-2020 Referenced Document

• GB 4943.1-2011 Information technology equipment.Safety.Part 1:General requirements
• 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 Heat resistance of electrical insulating materials - Part 1: Aging 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—Part3: 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 156 Standard voltages
• GB/T 16895.10-2010 Low-voltage electrical installations.Part 4-44:Protection for safety.Protection against voltage disturbances and electromagnetic disturbances
• GB/T 16895.2 Low-voltage electrical installations—Part 4-42: Protection for safety—Protection against thermal effects
• GB/T 16895.21-2011 Low-voltage electrical installations - Part 4-41: Protection for safety-Protection against electric shock
• GB/T 16895.3 Low voltage electrical installations Part 5-54: Selection and installation of electrical equipment Earthing arrangements and protective conductors*， 2024-12-31 Update
• GB/T 16895.5-2012 Low-voltage electrical installations - Part 4-43: Protection for safety - Protection against overcurrent
• 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 2423.1 Environmental testing for electric and electronic products.Part 2:Test methods.Tests A:Cold
• GB/T 2423.17 Environmental testing Part 2: Test methods Test Ka: Salt spray*， 2024-08-23 Update
• GB/T 2423.2 Environmental testing for electric and electronic products.Part 2:Test methods.Tests B:Dry heat
• GB/T 2423.24 Environmental testing—Part 2: Test methods—Test S: Simulated solar radiation at ground level and guidance for solar radiation testing and weathering*， 2022-07-11 Update
• GB/T 2423.3 Environmental testing—Part 2：Testing method—Test Cab:Damp heat,steady state
• GB/T 2423.4 Environmental testing for electrical and electronic products - Part 2: Test method Test Db alternating damp heat (12h + 12h cycle)
• 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
• GB/T 4208 Enclosure protection level (IP code) "Amendment No. 1" GB/T 4208-2017
• GB/T 7251.1-2013 Low-voltage switchgear and controlgear assemblies―Part 1: General rules
• IEC 60364 Low-voltage electrical installations - Part 8-82: Functional aspects - Prosumer's low-voltage electrical installations*， 2022-10-20 Update
• QC/T 413-2002 Basic Technical Conditions of Automotive Electrical Equipment

GB/T 38775.1-2020 history

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

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