AG Electrical Technology Co., Ltd
What is a GBT Charger?

What is a GBT Charger?

1. Charging standards for mainstream electric vehicles


Thanks to the boom in the new energy industry, the electric vehicle charger industry also develops rapidly. Many countries engage in fierce competition specific to the electric vehicle charger market, among which the main one is the electric vehicle charging standard. At present, there are three main groups of charging standards for new energy vehicles: Type1 (American standard); Type2 (European standard), utilizing the SAE J1772 standard led by the international society of automotive engineers (SAE); and GBT, Chinese standard as well as CHAdeMO (Japanese standard), first introduced in 2010 by the Japan Electric Vehicle Association and the Japan Electric Vehicle Charging Association.


As the name implies, the GBT charger of AG ELECTRICAL is based on the Chinese standard.


2. GB/T standard


On December 28, 2015, five newly revised national standards for charging interfaces and communication protocols for electric vehicles were issued in Beijing by the Standardization Administration of the Chinese General Administration of Quality Supervision, Inspection and Quarantine together with the National Energy Administration, the Ministry of Industry and Information Technology and the Ministry of Science and Technology. The new standards took effect on January 1, 2016. The GB/T standard is divided into three parts: the general requirements, AC and DC and the communication between the charger and BMS, specifically listed as follows:


(1) GB/T 18487.1-2015 Conducting Charging Systems for Electric Vehicles – Part 1: General Requirements


(2) GBT/T 20234.1-2015 Connectors for Conducting Charging for Electric Vehicles – Part 1: General Requirements


(3) GB/T 20234.2-2015 Connectors for Conducting Charging for Electric Vehicles – Part 2: Alternating Current Charging Interfaces


(4) GB/T 20234.3-2015 Connectors for Conducting Charging for Electric Vehicles – Part 3: Direct Current Charging Interfaces


(5) GB/T 27930-2015 Communication Protocol between Off-board Conductive Charger and Battery Management System of Electric Vehicle


The introduction of GB/T standard improves the safety and compatibility of charging.


(1) Security

GB/T standards increase the functions like charging interface temperature monitoring, electronic lock, insulation monitoring, discharge circuit, etc., elaborate the vehicle interface of DC charging security protection measures and explicitly prohibit unsafe charging mode application. Thanks to the efforts, personnel electric shock, equipment combustion and other accidents are effectively avoided, and the safety of electric vehicles and users during charging are guaranteed.


(2) Compatibility

The type and structure of AC-DC charging interface are compatible with the original standard. The GB/T standard modifies the size of some contacts and mechanical locks, but the new and old plugs and sockets can cooperate with each other, and the electronic locking device added to the DC charging interface does not affect the electrical connection between the new and old products. Users only need to update the communication protocol version to realize the basic charging function of new power supply equipment and electric vehicles.


The GBT charger manufactured by AG ELECTRICAL complies with the regulations and requirements of GB/T20234.2-2015 and GB/T18487.1-2015, which, with higher compatibility, can charge all electric vehicles made in China and correctly and effectively convert them to applicable point current.

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