The new and old DC fast charge national standard mainly refers to the two generations of DC fast charge interface standards implemented in China, which are GB\/T (national standard) and GB\/T (national standard). There are some differences between the two standards in interface design, communication protocol and charging performance. Here are the main differences:
1. Interface design:
GB\/T (national standard) : The dual-gun charging interface design is used for DC charging and AC charging respectively. The interface type is GB\/T 20234.3-2011.
GB\/T (National standard) : The integrated charging interface design supports both DC charging and AC charging. The interface type is GB\/T 20234.3-2014.
2. Communication protocol:
GB\/T (National standard) : mainly adopts the wired communication protocol between the charging pile and the electric vehicle, based on CAN bus technology.
GB\/T (national standard) : a combination of wired and wireless communication technologies, including CAN bus and wired communication. At the same time, wireless communication functions, such as Bluetooth, Wi-Fi, etc. are added to improve communication efficiency and convenience.
3. Charging performance:
GB\/T (national standard) : The maximum charging current is 250A, the maximum charging voltage is 500V, and the maximum charging power is 125kW.
GB\/T (national standard) : The maximum charging current is 400A, the maximum charging voltage is 1000V, and the maximum charging power is 200kW.
4. Compatibility:
GB\/T (national standard) : poor compatibility with older electric vehicles.
GB\/T (national standard) : has good backward compatibility, can be compatible with old electric vehicles and new electric vehicles.
5. Safety and protection functions:
GB\/T (national standard) : It has certain security protection and communication functions.
GB\/T (national standard) : The safety protection and communication functions have been further enhanced, including charging gun plug protection, temperature protection, voltage protection, etc.
In short, GB\/T (national standard) and GB\/T (national standard) have certain differences in interface design, communication protocols, charging performance and so on. The GB\/T (National standard) charging standard has been improved in terms of performance and safety, and can better meet the needs of the electric vehicle market. However, the poor compatibility of GB\/T (national standard) may cause older electric vehicles to be unable to use the new charging pile. Therefore, when promoting the new national standard, it is also necessary to consider the compatibility issue.
The difference between the new and old DC fast charge national standard is mainly reflected in the following aspects:
1. Different charging power: the new national standard DC fast charge power has been greatly improved, usually 150 kW, while the old national standard DC fast charge power is usually 50 kW. The new national standard has higher power and faster charging speed. 2. Charging interface is different: the new national standard DC fast charge uses the second-generation DC national standard interface (GBT 20234.3-2015), which has the characteristics of anti-misplug, anti-miscontact, high reliability, etc. The old national standard DC fast charge uses a generation of DC national standard interface (GBT 20234.2-2011), and the interface is relatively simple.
3. Improvement of security performance: The new national standard considers the improvement of security performance in the interface design, by adding some functions and architecture improvements, such as adding anti-misinsertion function on the interface, stricter requirements for the implementation of the site's conduction test, and dividing the special user conditions to be met.
4. The charging communication protocol is different: the new national standard DC fast charge adopts the technology based on CAN FD and Ethernet. V2G" The communication protocol has a higher communication rate and more abundant functions, and the old national standard DC fast charge communication protocol is relatively simple. In general, the new national standard DC fast charge has been improved in terms of charging power, interface design, safety performance and communication protocol, and is more suitable for the current needs of the development of electric vehicles.
1. Interface type: The new national standard DC fast charge uses a smaller interface type, called GB\/T interface, while the old national standard DC fast charge uses CHadeMO and CCS interface types.
2. Communication protocol: The new national standard DC fast charge adopts a communication protocol that can support two-way energy transmission, which can realize the reverse energy supply of vehicles to the grid, while the old national standard DC fast charge communication protocol only supports one-way energy transmission. 3. Power capacity: The new GB DC fast charge can support up to 350 kW (kW) of power output, while the old GB DC fast charge can support up to 50 kW (kW) of power output. 4. Compatibility: The new national standard DC fast charge is more compatible and can be adapted to a variety of brands of electric vehicles, while the old national standard DC fast charge needs to be matched according to the interface type of the vehicle. In general, compared with the old national standard DC fast charge, the new national standard DC fast charge has been improved in terms of interface type, communication protocol, power capacity and compatibility, which is more in line with the development trend of electric vehicle fast charge demand.
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Charging facilities: New and old national standards have different requirements for charging facilities. The old standard has higher requirements for voltage, current, power and other indicators of charging facilities, while the new standard has relatively lower requirements for voltage, current, power and other indicators of charging facilities.
Charging equipment: New and old national standards for charging equipment requirements are also different. The old standard has high technical requirements for charging equipment, including output voltage, output current, charging efficiency and other indicators, while the new standard has relatively low technical requirements for charging equipment, mainly the requirements for wiring terminals.
Charging method: The new and old national standards have different requirements for charging methods. The old standard has high requirements for fast charging methods, including charging power, charging time and other indicators, while the new standard has relatively low requirements for fast charging methods, mainly for power and time indicators.
Safety: New and old national standards for charging safety are also different. The old standard has high safety requirements for charging equipment, including safety measures to prevent overcharge, overdischarge, and overcurrent, while the new standard has relatively low safety requirements for charging equipment, mainly for overcharge and overdischarge.
In short, there are certain differences between the new and old DC fast charge national standards in charging facilities, charging equipment, charging methods and safety. When purchasing charging equipment, it is recommended that you refer to the latest requirements of national standards to ensure the quality and safety of charging.
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Hi~ About the difference between the new and old DC fast charger national standard, I can give you some simple explanation.
The new and old DC fast charge national standard mainly refers to two different fast charge standards in China, GB\/T 20234.3-2011 and GB\/T 27930-2015.
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GB\/T 20234.3-2011: This is the old DC fast charge national standard, also known as " National standard 1.0" . It specifies the technical requirements and test methods of DC fast charging equipment, including voltage range, current range, charging time, etc. This standard was released in 2011 for early DC fast charge devices.
GB\/T 27930-2015: This is the new DC fast charging national standard, also known as " National standard 2.0" . Compared with the old standard, the new standard has improved and promoted the technical requirements and test methods. It increases the requirements for the safety, stability and compatibility of the charging equipment, and improves the charging efficiency and charging speed. This standard was released in 2015 and applies to the current newer DC fast charge devices.
In general, the difference between the new and old DC fast charging national standard mainly lies in the different technical requirements and test methods, and the new standard is more stringent and advanced. If you want to buy DC fast charging equipment, it is recommended to choose products that meet the latest national standard to obtain better charging effect and security.
There are the following differences between the old and new DC fast charging national standard:
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1. Standard name: The old national standard is GB\/T 20234.3-2011 \"Electrical equipment for road vehicles Part 3: Special connectors and sockets for electric vehicles\". The new national standard is GB\/T 20234.3-2015 \"Electric vehicles and external charging equipment Part 3: Special connectors and sockets for electric vehicles\".
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2. Charging power: the maximum power of the DC fast charge standard in the old national standard is 50kW, while the new national standard increases the maximum charging power to 120kW.
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3. Socket design: The DC fast charging socket in the new national standard is different from the old national standard, mainly from the plug shape, the number of leads and the connection method has been improved and optimized.
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4. Compatibility: The design of the new national standard DC fast charging socket is more in line with international standards, so it has better compatibility and can meet the charging needs of different brands and models of electric vehicles.
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These differences are mainly reflected in the further improvement and standardization of DC fast charging technology by the new national standard to meet the growing demand of the electric vehicle market and promote the development and standardization of charging equipment. When selecting charging equipment and using services, it is necessary to ensure that it matches the applicable national standard according to its own model and needs.
The difference between the new and old DC fast charging national standard lies in the charging power and charging interface. The old national standard DC fast charge power is generally 50kW, while the new national standard DC fast charge power can reach 350kW, which greatly reduces the charging time.
In addition, the old national standard uses the GB\/T interface, while the new national standard uses the CCS (Combined Charging System) interface, which is compatible with AC and DC charging, improving the versatility of charging equipment.
The new national standard also adds some safety protection measures, such as temperature monitoring and fault self-diagnosis functions, to improve the safety and reliability of charging. In general, the new national standard DC fast charging technology is more advanced, able to charge electric vehicles more quickly and safely.
The difference is that the 2015 new national standard mainly increases the electric vehicle battery voltage detection function, detecting whether the battery voltage is between the maximum voltage and the minimum voltage of the charging pile output, colleagues also detect whether the message sent by the electric vehicle is consistent with the battery voltage, at present, several domestic testing institutions use the Zhiyuan electronic charging pile test system.