GB/T 38775.8-2023 in English

《GB/T 38775.8-2023电动汽车无线充电系统 第8部分：商用车应用特殊要求》由524（中国电力企业联合会）归口，主管部门为中国电力企业联合会。

Electric vehicle wireless power transfer—
Part 8: Specific requirements of commercial vehicle

1 Scope

This document specifies the special application requirements for commercial vehicles with electric vehicle wireless power transfer.

This document is applicable to the static magnetic coupling wireless power transfer of electric commercial vehicles with power level greater than 22 kW, the maximum nominal voltage of power supply of 1,500 V (DC), and the maximum nominal output voltage of 1,500 V (DC). This document may be used for reference for other nominal output voltages.

2 Normative references

The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB/T 19596 Terminology of electric vehicles
GB/T 38775.1-2020 Electric vehicle wireless power transfer - Part 1: General requirements
GB/T 38775.3-2020 Electric vehicle wireless power transfer - Part 3: Specific requirements
GB/T 38775.4-2020 Electric vehicle wireless power transfer - Part 4: Limits and test methods of electromagnetic environment
GB/T 38775.5-2021 Electric vehicle wireless power transfer - Part 5: Electromagnetic compatibility requirements and test methods
GB/T 38775.6-2021 Electric vehicle wireless power transfer - Part 6: Interoperability requirements and testing - Ground side

3 Terms and definitions

For the purposes of this document, the terms and definitions given in GB/T 19596, GB/T 38775.1 -2020 and GB/T 38775.3 -2020 and the following apply.

3.1
commercial vehicle
automobile designed for and technically featured by transporting people and goods

Note: Commercial vehicles can tow trailers, excluding passenger cars.

[Source: 2.2.2 of GB/T 3730.1-2001, modified]

3.2
ground clearance
minimum vertical distance between the lower surface of on-board equipment and the ground

3.3
system efficiency
ratio of the output power of on-board equipment to the input power of ground equipment

3.4
alignment tolerance area
area where the MF-WPT system can meet the requirements of interoperability for wireless power transmission in the X-axis and Y-axis directions, with the ground clearance of the secondary device determined

[Source: 3.10 of GB/T 38775.6-2021]

3.5
center alignment point
geometric center point of the alignment tolerance area

[Source: 3.8 of GB/T 38775.6-2021]

4 Symbols and abbreviations

4.1 Symbols

For the purposes of this document, the following symbols apply.

Uout-min: the minimum charging voltage for load, i.e., the minimum output voltage of the MF-WPT system.

Uout-max: the maximum charging voltage for load, i.e., the maximum output voltage of the MF-WPT system.

Uout-nom: the nominal voltage for load, i.e., the nominal output voltage of MF-WPT system.

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations
4.1 Symbols
4.2 Abbreviations
5 General
5.1 System architecture
5.2 Classification
6 Requirements
6.1 Requirements for preparation phase before charging
6.2 Requirements for charging start phase
6.3 Requirements for charging transmission phase
6.4 Requirements for charging stop phase
7 Test preparation
7.1 Frequency setting
7.2 Setting of alignment tolerance area and center alignment point
7.3 Selection of output voltage measuring point
7.4 Layout of test devices
8 Test methods
8.1 Test during preparation phase before charging
8.2 Test during charging start phase
8.3 Test during charging transmission phase
Annex A (Informative) Commercial vehicle MF-WPT system-ground equipment
A.1 Mechanical structure of ground equipment
A.2 Circuit design of ground equipment
Annex B (Informative) Commercial vehicle MF-WPT system-on-board equipment
B.1 Mechanical structure of on-board equipment
B.2 Circuit design of on-board equipment
Annex C (Informative) System efficiency test record table
Bibliography