Recently China National Energy Administration (NEA) published an official explnantion on two EV charging standards- “GB 39752–2024 Safety Requirements for Conductive Charging Systems of Electric Vehicles Standard Highlights” and “GB 44323–2024 Safety Requirements for Wireless Charging Systems of Electric Vehicles Standard Highlights” as below.

GB 39752–2024

Safety Requirements for Conductive Charging Systems of Electric Vehicles Standard Highlights

• Specifies basic safety requirements for electric vehicle conductive charging systems.

• Covers systems that deliver electrical energy via conductive means while the vehicle is stationary.

• Applie to electric vehicles (including plug-in hybrids) and supply devices within the conductive charging system.

• Covers electrical safety, mechanical safety, environmental adaptability, and functional safety of charging systems.

Key Safety Requirements

1. General Electrical Safety Requirements

• Insulation resistance

• Di-electric withstand voltage

• Protective grounding

• Short-circuit protection

• Overcurrent protection

• Overvoltage protection

• Undervoltage protection

• Emergency shutdown

2. Connection Interface Safety Requirements

• Protection against incorrect insertion

• Protection  against electric shock

• Mechanical  strength of the connector

• Durability  of plug-in operations

3. Mechanical Safety Requirements

• Resistance to mechanical impact

• Prevention of tripping hazards

• Vibration and shock resistance

4. Environmental Adaptability Requirements

• Protection against water and dust (IP rating)

• Resistance to high and low temperatures

• UV  resistance

• Corrosion resistance

5. Functional Safety Requirements

• Communication between vehicle and charger

• Authentication

• Functiona error detection and protection

GB 44323–2024

Safety Requirements for Wireless Charging Systems of Electric Vehicles Standard Highlights

• Specifies basic safety requirements for wireless power transfer (WPT) systems used  for stationary electric vehicle charging.

• Covers electric vehicles (including plug-in hybrids) and wireless supply equipment.

• Focuses on ensuring safe energy transmission through magnetic fields while avoiding harm to humans, animals, and the environment.

• Addresses  electrical safety, electromagnetic field (EMF) safety, mechanical safety, and environmental adaptability.

Key Safety Requirements

1. General Electrical Safety Requirements

• Insulation resistance

• Dielectric withstand voltage

• Short-circuit protection

• Overcurrent protection

• Overvoltage protection

• Emergency shutdown

2. Wireless Energy Transmission Safety Requirements

• Field strength limit

• Human exposure assessment

• Detection and protection for foreign objects (FOD)

• Accurate  positioning between the vehicle and the wireless charger

3. Mechanical Safety Requirements

• Structural strength

• Resistance to mechanical impact

• Prevention of tripping hazards

4. Environmental Adaptability Requirements

• Protection  against water and dust (IP rating)

• Resistance to temperature extremes

• UV resistance

• Corrosion  resistance

5. Functional Safety Requirements

• Communication between vehicle and charger

• Misalignment detection

• Fault detection and protection

• System shutdown under abnormal conditions

Background

These two national standards—GB 39752–2024 and GB 44323–2024—fill the regulatory gap for safety requirements in electric vehicle charging systems, both conductive and wireless.

They:

• Promote the safe, reliable, and efficient development of electric vehicle infrastructure.

• Enhance user safety during charging.

• Ensure the technical advancement and sustainable growth of the electric vehicle industry.

Published by:

• Nationa Technical Committee of Auto Standardization (SAC/TC114)

• National Technical Committee of Electric Vehicle Charging Facilities  Standardization (SAC/TC482)

  
  

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