One-Sentence Summary
GB/T 20234 is the recommended national standard governing EV charging connectors (plugs/sockets) in China. It underwent a major revision in 2023, and the AC, DC, and high-power DC connector parts each have different current versions, so always check the year suffix when citing them.
Scope and Role of the Standard
GB/T 20234, "Connecting devices for conductive charging of electric vehicles", was jointly issued by China's State Administration for Market Regulation (SAMR) and the Standardization Administration of China (SAC), administered by the Ministry of Industry and Information Technology, and is the core charging-connector standard managed by the National Technical Committee of Auto Standardization. It specifies the forms of charging plugs and sockets, contact definitions, structural dimensions, and mechanical and electrical requirements, ensuring interoperability between different vehicle models and charging piles.
Note: a "T" in the standard number indicates a recommended (voluntary) standard; once cited in contracts, tender documents, or certification requirements, it becomes binding.
The Standard Series: Four Parts
| Part | Title | Current version | Publication / Effective date |
|---|---|---|---|
| Part 1 | General requirements | GB/T 20234.1-2023 | Published and effective 2023-09-07 |
| Part 2 | AC charging interface | GB/T 20234.2-2015 | Published 2015-12-28, effective 2016-01-01 |
| Part 3 | DC charging interface | GB/T 20234.3-2023 | Published and effective 2023-09-07 |
| Part 4 | High-power DC charging interface | GB/T 20234.4-2023 | Published 2023-09-07, effective 2024-04-01 |
Common mistakes to avoid:
- AC charging corresponds to Part 2 (20234.2), not Part 3.
- The 2023 revision updated Parts 1, 3, and 4; the AC charging interface still uses the 2015 version, and no "GB/T 20234.2-2023" exists.
- The current version of the DC charging interface is 20234.3-2023; do not carry over the old 2015 version when citing.
Key Points of the 2023 Revision
The 2023 revision responds to the industry's need for 800V high-voltage platforms and the spread of ultra-fast charging. The main changes include:
- Higher rated parameters: raises the rated voltage and current limits of the DC charging interface to suit high-voltage ultra-fast charging scenarios.
- Stronger safety protection: refines insulation safety, temperature monitoring, mechanical durability, and environmental tolerance requirements to handle high/low temperatures, heat and humidity, and vibration conditions.
- New ultra-high-power provisions: Part 3 upgrades the DC fast-charging requirements, and Part 4 establishes a separate high-power DC charging interface system (not interoperable with the Part 3 connector).
- Unified inspection rules: standardizes test methods and inspection rules to improve vehicle–charger interoperability.
Related Supporting Standards
| Standard | Scope | Type |
|---|---|---|
| GB/T 18487.1-2023 | General requirements for conductive charging systems (classification, electric shock protection, construction and performance) | Recommended |
| GB/T 27930 series | Digital communication protocol between charger and vehicle during DC charging | Recommended |
| GB 44263-2024 | Safety requirements for conductive charging systems | Mandatory |
| NB/T 33001/33002, etc. | Technical specifications and test methods for chargers/AC piles | Energy industry standards |
Recommendations for Citing in Engineering Work
- Verify the year suffix: when citing standard numbers in bids and product documentation, always use the exact year of the current version.
- Match the connector type: cite 20234.2 for AC piles and 20234.3 for DC piles; for ultra-fast charging plans, assess the rollout pace of 20234.4 support.
- Check vehicle support: the vast majority of DC fast-charging piles follow the GB/T 20234.3 connector; adoption of the new connector system will depend on how quickly vehicle models support it.
Sources and References
- National Public Service Platform for Standards Information (GB/T 20234.1-2023 standard details): openstd.samr.gov.cn
- Announcement of 2023 national standards issued by SAMR and SAC
- Guide to the national standard system for charging piles (TNC): tncxny.com